diff options
Diffstat (limited to 'src/window.c')
| -rw-r--r-- | src/window.c | 7721 |
1 files changed, 7721 insertions, 0 deletions
diff --git a/src/window.c b/src/window.c new file mode 100644 index 0000000..a804b4f --- /dev/null +++ b/src/window.c @@ -0,0 +1,7721 @@ +/* vi:set ts=8 sts=4 sw=4 noet: + * + * VIM - Vi IMproved by Bram Moolenaar + * + * Do ":help uganda" in Vim to read a list of people who contributed. + * Do ":help credits" in Vim to see a list of people who contributed. + * See README.txt for an overview of the Vim source code. + */ + +#include "vim.h" + +static void cmd_with_count(char *cmd, char_u *bufp, size_t bufsize, long Prenum); +static void win_init(win_T *newp, win_T *oldp, int flags); +static void win_init_some(win_T *newp, win_T *oldp); +static void frame_comp_pos(frame_T *topfrp, int *row, int *col); +static void frame_setheight(frame_T *curfrp, int height); +static void frame_setwidth(frame_T *curfrp, int width); +static void win_exchange(long); +static void win_rotate(int, int); +static void win_totop(int size, int flags); +static void win_equal_rec(win_T *next_curwin, int current, frame_T *topfr, int dir, int col, int row, int width, int height); +static void trigger_winclosed(win_T *win); +static win_T *win_free_mem(win_T *win, int *dirp, tabpage_T *tp); +static frame_T *win_altframe(win_T *win, tabpage_T *tp); +static tabpage_T *alt_tabpage(void); +static win_T *frame2win(frame_T *frp); +static int frame_has_win(frame_T *frp, win_T *wp); +static void win_fix_scroll(int resize); +static void win_fix_cursor(int normal); +static void frame_new_height(frame_T *topfrp, int height, int topfirst, int wfh); +static int frame_fixed_height(frame_T *frp); +static int frame_fixed_width(frame_T *frp); +static void frame_add_statusline(frame_T *frp); +static void frame_new_width(frame_T *topfrp, int width, int leftfirst, int wfw); +static void frame_add_vsep(frame_T *frp); +static int frame_minwidth(frame_T *topfrp, win_T *next_curwin); +static void frame_fix_width(win_T *wp); +static int win_alloc_firstwin(win_T *oldwin); +static void new_frame(win_T *wp); +static tabpage_T *alloc_tabpage(void); +static int leave_tabpage(buf_T *new_curbuf, int trigger_leave_autocmds); +static void enter_tabpage(tabpage_T *tp, buf_T *old_curbuf, int trigger_enter_autocmds, int trigger_leave_autocmds); +static void frame_fix_height(win_T *wp); +static int frame_minheight(frame_T *topfrp, win_T *next_curwin); +static int may_open_tabpage(void); +static int win_enter_ext(win_T *wp, int flags); +static void win_free(win_T *wp, tabpage_T *tp); +static void win_append(win_T *after, win_T *wp); +static void frame_append(frame_T *after, frame_T *frp); +static void frame_insert(frame_T *before, frame_T *frp); +static void frame_remove(frame_T *frp); +static void win_goto_ver(int up, long count); +static void win_goto_hor(int left, long count); +static void frame_add_height(frame_T *frp, int n); +static void last_status_rec(frame_T *fr, int statusline); + +static void make_snapshot_rec(frame_T *fr, frame_T **frp); +static void clear_snapshot(tabpage_T *tp, int idx); +static void clear_snapshot_rec(frame_T *fr); +static int check_snapshot_rec(frame_T *sn, frame_T *fr); +static win_T *restore_snapshot_rec(frame_T *sn, frame_T *fr); +static win_T *get_snapshot_curwin(int idx); + +static int frame_check_height(frame_T *topfrp, int height); +static int frame_check_width(frame_T *topfrp, int width); + +static win_T *win_alloc(win_T *after, int hidden); + +#define NOWIN ((win_T *)-1) // non-existing window + +#define ROWS_AVAIL (Rows - p_ch - tabline_height()) + +// flags for win_enter_ext() +#define WEE_UNDO_SYNC 0x01 +#define WEE_CURWIN_INVALID 0x02 +#define WEE_TRIGGER_NEW_AUTOCMDS 0x04 +#define WEE_TRIGGER_ENTER_AUTOCMDS 0x08 +#define WEE_TRIGGER_LEAVE_AUTOCMDS 0x10 +#define WEE_ALLOW_PARSE_MESSAGES 0x20 + +static char *m_onlyone = N_("Already only one window"); + +// When non-zero splitting a window is forbidden. Used to avoid that nasty +// autocommands mess up the window structure. +static int split_disallowed = 0; + +// When non-zero closing a window is forbidden. Used to avoid that nasty +// autocommands mess up the window structure. +static int close_disallowed = 0; + +/* + * Disallow changing the window layout (split window, close window, move + * window). Resizing is still allowed. + * Used for autocommands that temporarily use another window and need to + * make sure the previously selected window is still there. + * Must be matched with exactly one call to window_layout_unlock()! + */ + static void +window_layout_lock(void) +{ + ++split_disallowed; + ++close_disallowed; +} + + static void +window_layout_unlock(void) +{ + --split_disallowed; + --close_disallowed; +} + +/* + * When the window layout cannot be changed give an error and return TRUE. + * "cmd" indicates the action being performed and is used to pick the relevant + * error message. + */ + int +window_layout_locked(enum CMD_index cmd) +{ + if (split_disallowed > 0 || close_disallowed > 0) + { + if (close_disallowed == 0 && cmd == CMD_tabnew) + emsg(_(e_cannot_split_window_when_closing_buffer)); + else + emsg(_(e_not_allowed_to_change_window_layout_in_this_autocmd)); + return TRUE; + } + return FALSE; +} + +// #define WIN_DEBUG +#ifdef WIN_DEBUG +/* + * Call this method to log the current window layout. + */ + static void +log_frame_layout(frame_T *frame) +{ + ch_log(NULL, "layout %s, wi: %d, he: %d, wwi: %d, whe: %d, id: %d", + frame->fr_layout == FR_LEAF ? "LEAF" + : frame->fr_layout == FR_ROW ? "ROW" : "COL", + frame->fr_width, + frame->fr_height, + frame->fr_win == NULL ? -1 : frame->fr_win->w_width, + frame->fr_win == NULL ? -1 : frame->fr_win->w_height, + frame->fr_win == NULL ? -1 : frame->fr_win->w_id); + if (frame->fr_child != NULL) + { + ch_log(NULL, "children"); + log_frame_layout(frame->fr_child); + if (frame->fr_next != NULL) + ch_log(NULL, "END of children"); + } + if (frame->fr_next != NULL) + log_frame_layout(frame->fr_next); +} +#endif + +/* + * Return the current window, unless in the cmdline window and "prevwin" is + * set, then return "prevwin". + */ + win_T * +prevwin_curwin(void) +{ + // In cmdwin, the alternative buffer should be used. + return is_in_cmdwin() && prevwin != NULL ? prevwin : curwin; +} + +/* + * All CTRL-W window commands are handled here, called from normal_cmd(). + */ + void +do_window( + int nchar, + long Prenum, + int xchar) // extra char from ":wincmd gx" or NUL +{ + long Prenum1; + win_T *wp; + char_u *ptr; + linenr_T lnum = -1; +#ifdef FEAT_FIND_ID + int type = FIND_DEFINE; + int len; +#endif + char_u cbuf[40]; + + if (ERROR_IF_ANY_POPUP_WINDOW) + return; + +#define CHECK_CMDWIN \ + do { \ + if (cmdwin_type != 0) \ + { \ + emsg(_(e_invalid_in_cmdline_window)); \ + return; \ + } \ + } while (0) + + Prenum1 = Prenum == 0 ? 1 : Prenum; + + switch (nchar) + { +// split current window in two parts, horizontally + case 'S': + case Ctrl_S: + case 's': + CHECK_CMDWIN; + reset_VIsual_and_resel(); // stop Visual mode + // When splitting the quickfix window open a new buffer in it, + // don't replicate the quickfix buffer. + if (bt_quickfix(curbuf)) + goto newwindow; +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + (void)win_split((int)Prenum, 0); + break; + +// split current window in two parts, vertically + case Ctrl_V: + case 'v': + CHECK_CMDWIN; + reset_VIsual_and_resel(); // stop Visual mode + // When splitting the quickfix window open a new buffer in it, + // don't replicate the quickfix buffer. + if (bt_quickfix(curbuf)) + goto newwindow; +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + (void)win_split((int)Prenum, WSP_VERT); + break; + +// split current window and edit alternate file + case Ctrl_HAT: + case '^': + CHECK_CMDWIN; + reset_VIsual_and_resel(); // stop Visual mode + + if (buflist_findnr(Prenum == 0 + ? curwin->w_alt_fnum : Prenum) == NULL) + { + if (Prenum == 0) + emsg(_(e_no_alternate_file)); + else + semsg(_(e_buffer_nr_not_found), Prenum); + break; + } + + if (!curbuf_locked() && win_split(0, 0) == OK) + (void)buflist_getfile( + Prenum == 0 ? curwin->w_alt_fnum : Prenum, + (linenr_T)0, GETF_ALT, FALSE); + break; + +// open new window + case Ctrl_N: + case 'n': + CHECK_CMDWIN; + reset_VIsual_and_resel(); // stop Visual mode +newwindow: + if (Prenum) + // window height + vim_snprintf((char *)cbuf, sizeof(cbuf) - 5, "%ld", Prenum); + else + cbuf[0] = NUL; +#if defined(FEAT_QUICKFIX) + if (nchar == 'v' || nchar == Ctrl_V) + STRCAT(cbuf, "v"); +#endif + STRCAT(cbuf, "new"); + do_cmdline_cmd(cbuf); + break; + +// quit current window + case Ctrl_Q: + case 'q': + reset_VIsual_and_resel(); // stop Visual mode + cmd_with_count("quit", cbuf, sizeof(cbuf), Prenum); + do_cmdline_cmd(cbuf); + break; + +// close current window + case Ctrl_C: + case 'c': + reset_VIsual_and_resel(); // stop Visual mode + cmd_with_count("close", cbuf, sizeof(cbuf), Prenum); + do_cmdline_cmd(cbuf); + break; + +#if defined(FEAT_QUICKFIX) +// close preview window + case Ctrl_Z: + case 'z': + CHECK_CMDWIN; + reset_VIsual_and_resel(); // stop Visual mode + do_cmdline_cmd((char_u *)"pclose"); + break; + +// cursor to preview window + case 'P': + FOR_ALL_WINDOWS(wp) + if (wp->w_p_pvw) + break; + if (wp == NULL) + emsg(_(e_there_is_no_preview_window)); + else + win_goto(wp); + break; +#endif + +// close all but current window + case Ctrl_O: + case 'o': + CHECK_CMDWIN; + reset_VIsual_and_resel(); // stop Visual mode + cmd_with_count("only", cbuf, sizeof(cbuf), Prenum); + do_cmdline_cmd(cbuf); + break; + +// cursor to next window with wrap around + case Ctrl_W: + case 'w': +// cursor to previous window with wrap around + case 'W': + CHECK_CMDWIN; + if (ONE_WINDOW && Prenum != 1) // just one window + beep_flush(); + else + { + if (Prenum) // go to specified window + { + for (wp = firstwin; --Prenum > 0; ) + { + if (wp->w_next == NULL) + break; + else + wp = wp->w_next; + } + } + else + { + if (nchar == 'W') // go to previous window + { + wp = curwin->w_prev; + if (wp == NULL) + wp = lastwin; // wrap around + } + else // go to next window + { + wp = curwin->w_next; + if (wp == NULL) + wp = firstwin; // wrap around + } + } + win_goto(wp); + } + break; + +// cursor to window below + case 'j': + case K_DOWN: + case Ctrl_J: + CHECK_CMDWIN; + win_goto_ver(FALSE, Prenum1); + break; + +// cursor to window above + case 'k': + case K_UP: + case Ctrl_K: + CHECK_CMDWIN; + win_goto_ver(TRUE, Prenum1); + break; + +// cursor to left window + case 'h': + case K_LEFT: + case Ctrl_H: + case K_BS: + CHECK_CMDWIN; + win_goto_hor(TRUE, Prenum1); + break; + +// cursor to right window + case 'l': + case K_RIGHT: + case Ctrl_L: + CHECK_CMDWIN; + win_goto_hor(FALSE, Prenum1); + break; + +// move window to new tab page + case 'T': + CHECK_CMDWIN; + if (one_window()) + msg(_(m_onlyone)); + else + { + tabpage_T *oldtab = curtab; + tabpage_T *newtab; + + // First create a new tab with the window, then go back to + // the old tab and close the window there. + wp = curwin; + if (win_new_tabpage((int)Prenum) == OK + && valid_tabpage(oldtab)) + { + newtab = curtab; + goto_tabpage_tp(oldtab, TRUE, TRUE); + if (curwin == wp) + win_close(curwin, FALSE); + if (valid_tabpage(newtab)) + goto_tabpage_tp(newtab, TRUE, TRUE); + } + } + break; + +// cursor to top-left window + case 't': + case Ctrl_T: + win_goto(firstwin); + break; + +// cursor to bottom-right window + case 'b': + case Ctrl_B: + win_goto(lastwin); + break; + +// cursor to last accessed (previous) window + case 'p': + case Ctrl_P: + if (!win_valid(prevwin)) + beep_flush(); + else + win_goto(prevwin); + break; + +// exchange current and next window + case 'x': + case Ctrl_X: + CHECK_CMDWIN; + win_exchange(Prenum); + break; + +// rotate windows downwards + case Ctrl_R: + case 'r': + CHECK_CMDWIN; + reset_VIsual_and_resel(); // stop Visual mode + win_rotate(FALSE, (int)Prenum1); // downwards + break; + +// rotate windows upwards + case 'R': + CHECK_CMDWIN; + reset_VIsual_and_resel(); // stop Visual mode + win_rotate(TRUE, (int)Prenum1); // upwards + break; + +// move window to the very top/bottom/left/right + case 'K': + case 'J': + case 'H': + case 'L': + CHECK_CMDWIN; + win_totop((int)Prenum, + ((nchar == 'H' || nchar == 'L') ? WSP_VERT : 0) + | ((nchar == 'H' || nchar == 'K') ? WSP_TOP : WSP_BOT)); + break; + +// make all windows the same width and/or height + case '=': + { + int mod = cmdmod.cmod_split & (WSP_VERT | WSP_HOR); +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_equal(NULL, FALSE, + mod == WSP_VERT ? 'v' : mod == WSP_HOR ? 'h' : 'b'); + } + break; + +// increase current window height + case '+': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setheight(curwin->w_height + (int)Prenum1); + break; + +// decrease current window height + case '-': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setheight(curwin->w_height - (int)Prenum1); + break; + +// set current window height + case Ctrl__: + case '_': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setheight(Prenum ? (int)Prenum : 9999); + break; + +// increase current window width + case '>': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setwidth(curwin->w_width + (int)Prenum1); + break; + +// decrease current window width + case '<': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setwidth(curwin->w_width - (int)Prenum1); + break; + +// set current window width + case '|': +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_setwidth(Prenum != 0 ? (int)Prenum : 9999); + break; + +// jump to tag and split window if tag exists (in preview window) +#if defined(FEAT_QUICKFIX) + case '}': + CHECK_CMDWIN; + if (Prenum) + g_do_tagpreview = Prenum; + else + g_do_tagpreview = p_pvh; +#endif + // FALLTHROUGH + case ']': + case Ctrl_RSB: + CHECK_CMDWIN; + // keep Visual mode, can select words to use as a tag + if (Prenum) + postponed_split = Prenum; + else + postponed_split = -1; +#ifdef FEAT_QUICKFIX + if (nchar != '}') + g_do_tagpreview = 0; +#endif + + // Execute the command right here, required when "wincmd ]" + // was used in a function. + do_nv_ident(Ctrl_RSB, NUL); + postponed_split = 0; + break; + +// edit file name under cursor in a new window + case 'f': + case 'F': + case Ctrl_F: +wingotofile: + CHECK_CMDWIN; + if (check_text_or_curbuf_locked(NULL)) + break; + + ptr = grab_file_name(Prenum1, &lnum); + if (ptr != NULL) + { + tabpage_T *oldtab = curtab; + win_T *oldwin = curwin; +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + setpcmark(); + if (win_split(0, 0) == OK) + { + RESET_BINDING(curwin); + if (do_ecmd(0, ptr, NULL, NULL, ECMD_LASTL, + ECMD_HIDE, NULL) == FAIL) + { + // Failed to open the file, close the window + // opened for it. + win_close(curwin, FALSE); + goto_tabpage_win(oldtab, oldwin); + } + else if (nchar == 'F' && lnum >= 0) + { + curwin->w_cursor.lnum = lnum; + check_cursor_lnum(); + beginline(BL_SOL | BL_FIX); + } + } + vim_free(ptr); + } + break; + +#ifdef FEAT_FIND_ID +// Go to the first occurrence of the identifier under cursor along path in a +// new window -- webb + case 'i': // Go to any match + case Ctrl_I: + type = FIND_ANY; + // FALLTHROUGH + case 'd': // Go to definition, using 'define' + case Ctrl_D: + CHECK_CMDWIN; + if ((len = find_ident_under_cursor(&ptr, FIND_IDENT)) == 0) + break; + + // Make a copy, if the line was changed it will be freed. + ptr = vim_strnsave(ptr, len); + if (ptr == NULL) + break; + + find_pattern_in_path(ptr, 0, len, TRUE, + Prenum == 0 ? TRUE : FALSE, type, + Prenum1, ACTION_SPLIT, (linenr_T)1, (linenr_T)MAXLNUM); + vim_free(ptr); + curwin->w_set_curswant = TRUE; + break; +#endif + +// Quickfix window only: view the result under the cursor in a new split. +#if defined(FEAT_QUICKFIX) + case K_KENTER: + case CAR: + if (bt_quickfix(curbuf)) + qf_view_result(TRUE); + break; +#endif + +// CTRL-W g extended commands + case 'g': + case Ctrl_G: + CHECK_CMDWIN; +#ifdef USE_ON_FLY_SCROLL + dont_scroll = TRUE; // disallow scrolling here +#endif + ++no_mapping; + ++allow_keys; // no mapping for xchar, but allow key codes + if (xchar == NUL) + xchar = plain_vgetc(); + LANGMAP_ADJUST(xchar, TRUE); + --no_mapping; + --allow_keys; + (void)add_to_showcmd(xchar); + + switch (xchar) + { +#if defined(FEAT_QUICKFIX) + case '}': + xchar = Ctrl_RSB; + if (Prenum) + g_do_tagpreview = Prenum; + else + g_do_tagpreview = p_pvh; +#endif + // FALLTHROUGH + case ']': + case Ctrl_RSB: + // keep Visual mode, can select words to use as a tag + if (Prenum) + postponed_split = Prenum; + else + postponed_split = -1; + + // Execute the command right here, required when + // "wincmd g}" was used in a function. + do_nv_ident('g', xchar); + postponed_split = 0; + break; + + case 'f': // CTRL-W gf: "gf" in a new tab page + case 'F': // CTRL-W gF: "gF" in a new tab page + cmdmod.cmod_tab = tabpage_index(curtab) + 1; + nchar = xchar; + goto wingotofile; + + case 't': // CTRL-W gt: go to next tab page + goto_tabpage((int)Prenum); + break; + + case 'T': // CTRL-W gT: go to previous tab page + goto_tabpage(-(int)Prenum1); + break; + + case TAB: // CTRL-W g<Tab>: go to last used tab page + if (goto_tabpage_lastused() == FAIL) + beep_flush(); + break; + + default: + beep_flush(); + break; + } + break; + + default: beep_flush(); + break; + } +} + +/* + * Figure out the address type for ":wincmd". + */ + void +get_wincmd_addr_type(char_u *arg, exarg_T *eap) +{ + switch (*arg) + { + case 'S': + case Ctrl_S: + case 's': + case Ctrl_N: + case 'n': + case 'j': + case Ctrl_J: + case 'k': + case Ctrl_K: + case 'T': + case Ctrl_R: + case 'r': + case 'R': + case 'K': + case 'J': + case '+': + case '-': + case Ctrl__: + case '_': + case '|': + case ']': + case Ctrl_RSB: + case 'g': + case Ctrl_G: + case Ctrl_V: + case 'v': + case 'h': + case Ctrl_H: + case 'l': + case Ctrl_L: + case 'H': + case 'L': + case '>': + case '<': +#if defined(FEAT_QUICKFIX) + case '}': +#endif + case 'f': + case 'F': + case Ctrl_F: +#ifdef FEAT_FIND_ID + case 'i': + case Ctrl_I: + case 'd': + case Ctrl_D: +#endif + // window size or any count + eap->addr_type = ADDR_OTHER; + break; + + case Ctrl_HAT: + case '^': + // buffer number + eap->addr_type = ADDR_BUFFERS; + break; + + case Ctrl_Q: + case 'q': + case Ctrl_C: + case 'c': + case Ctrl_O: + case 'o': + case Ctrl_W: + case 'w': + case 'W': + case 'x': + case Ctrl_X: + // window number + eap->addr_type = ADDR_WINDOWS; + break; + +#if defined(FEAT_QUICKFIX) + case Ctrl_Z: + case 'z': + case 'P': +#endif + case 't': + case Ctrl_T: + case 'b': + case Ctrl_B: + case 'p': + case Ctrl_P: + case '=': + case CAR: + // no count + eap->addr_type = ADDR_NONE; + break; + } +} + + static void +cmd_with_count( + char *cmd, + char_u *bufp, + size_t bufsize, + long Prenum) +{ + if (Prenum > 0) + vim_snprintf((char *)bufp, bufsize, "%s %ld", cmd, Prenum); + else + STRCPY(bufp, cmd); +} + +/* + * If "split_disallowed" is set give an error and return FAIL. + * Otherwise return OK. + */ + static int +check_split_disallowed(void) +{ + if (split_disallowed > 0) + { + emsg(_(e_cant_split_window_while_closing_another)); + return FAIL; + } + if (curwin->w_buffer->b_locked_split) + { + emsg(_(e_cannot_split_window_when_closing_buffer)); + return FAIL; + } + return OK; +} + +/* + * split the current window, implements CTRL-W s and :split + * + * "size" is the height or width for the new window, 0 to use half of current + * height or width. + * + * "flags": + * WSP_ROOM: require enough room for new window + * WSP_VERT: vertical split. + * WSP_TOP: open window at the top-left of the shell (help window). + * WSP_BOT: open window at the bottom-right of the shell (quickfix window). + * WSP_HELP: creating the help window, keep layout snapshot + * + * return FAIL for failure, OK otherwise + */ + int +win_split(int size, int flags) +{ + if (ERROR_IF_ANY_POPUP_WINDOW) + return FAIL; + + if (check_split_disallowed() == FAIL) + return FAIL; + + // When the ":tab" modifier was used open a new tab page instead. + if (may_open_tabpage() == OK) + return OK; + + // Add flags from ":vertical", ":topleft" and ":botright". + flags |= cmdmod.cmod_split; + if ((flags & WSP_TOP) && (flags & WSP_BOT)) + { + emsg(_(e_cant_split_topleft_and_botright_at_the_same_time)); + return FAIL; + } + + // When creating the help window make a snapshot of the window layout. + // Otherwise clear the snapshot, it's now invalid. + if (flags & WSP_HELP) + make_snapshot(SNAP_HELP_IDX); + else + clear_snapshot(curtab, SNAP_HELP_IDX); + + return win_split_ins(size, flags, NULL, 0); +} + +/* + * When "new_wp" is NULL: split the current window in two. + * When "new_wp" is not NULL: insert this window at the far + * top/left/right/bottom. + * Return FAIL for failure, OK otherwise. + */ + int +win_split_ins( + int size, + int flags, + win_T *new_wp, + int dir) +{ + win_T *wp = new_wp; + win_T *oldwin; + int new_size = size; + int i; + int need_status = 0; + int do_equal = FALSE; + int needed; + int available; + int oldwin_height = 0; + int layout; + frame_T *frp, *curfrp, *frp2, *prevfrp; + int before; + int minheight; + int wmh1; + int did_set_fraction = FALSE; + + if (flags & WSP_TOP) + oldwin = firstwin; + else if (flags & WSP_BOT) + oldwin = lastwin; + else + oldwin = curwin; + + // add a status line when p_ls == 1 and splitting the first window + if (ONE_WINDOW && p_ls == 1 && oldwin->w_status_height == 0) + { + if (VISIBLE_HEIGHT(oldwin) <= p_wmh && new_wp == NULL) + { + emsg(_(e_not_enough_room)); + return FAIL; + } + need_status = STATUS_HEIGHT; + } + +#ifdef FEAT_GUI + // May be needed for the scrollbars that are going to change. + if (gui.in_use) + out_flush(); +#endif + + if (flags & WSP_VERT) + { + int wmw1; + int minwidth; + + layout = FR_ROW; + + /* + * Check if we are able to split the current window and compute its + * width. + */ + // Current window requires at least 1 space. + wmw1 = (p_wmw == 0 ? 1 : p_wmw); + needed = wmw1 + 1; + if (flags & WSP_ROOM) + needed += p_wiw - wmw1; + if (flags & (WSP_BOT | WSP_TOP)) + { + minwidth = frame_minwidth(topframe, NOWIN); + available = topframe->fr_width; + needed += minwidth; + } + else if (p_ea) + { + minwidth = frame_minwidth(oldwin->w_frame, NOWIN); + prevfrp = oldwin->w_frame; + for (frp = oldwin->w_frame->fr_parent; frp != NULL; + frp = frp->fr_parent) + { + if (frp->fr_layout == FR_ROW) + FOR_ALL_FRAMES(frp2, frp->fr_child) + if (frp2 != prevfrp) + minwidth += frame_minwidth(frp2, NOWIN); + prevfrp = frp; + } + available = topframe->fr_width; + needed += minwidth; + } + else + { + minwidth = frame_minwidth(oldwin->w_frame, NOWIN); + available = oldwin->w_frame->fr_width; + needed += minwidth; + } + if (available < needed && new_wp == NULL) + { + emsg(_(e_not_enough_room)); + return FAIL; + } + if (new_size == 0) + new_size = oldwin->w_width / 2; + if (new_size > available - minwidth - 1) + new_size = available - minwidth - 1; + if (new_size < wmw1) + new_size = wmw1; + + // if it doesn't fit in the current window, need win_equal() + if (oldwin->w_width - new_size - 1 < p_wmw) + do_equal = TRUE; + + // We don't like to take lines for the new window from a + // 'winfixwidth' window. Take them from a window to the left or right + // instead, if possible. Add one for the separator. + if (oldwin->w_p_wfw) + win_setwidth_win(oldwin->w_width + new_size + 1, oldwin); + + // Only make all windows the same width if one of them (except oldwin) + // is wider than one of the split windows. + if (!do_equal && p_ea && size == 0 && *p_ead != 'v' + && oldwin->w_frame->fr_parent != NULL) + { + frp = oldwin->w_frame->fr_parent->fr_child; + while (frp != NULL) + { + if (frp->fr_win != oldwin && frp->fr_win != NULL + && (frp->fr_win->w_width > new_size + || frp->fr_win->w_width > oldwin->w_width + - new_size - 1)) + { + do_equal = TRUE; + break; + } + frp = frp->fr_next; + } + } + } + else + { + layout = FR_COL; + + /* + * Check if we are able to split the current window and compute its + * height. + */ + // Current window requires at least 1 space. + wmh1 = (p_wmh == 0 ? 1 : p_wmh) + WINBAR_HEIGHT(curwin); + needed = wmh1 + STATUS_HEIGHT; + if (flags & WSP_ROOM) + needed += p_wh - wmh1; + if (flags & (WSP_BOT | WSP_TOP)) + { + minheight = frame_minheight(topframe, NOWIN) + need_status; + available = topframe->fr_height; + needed += minheight; + } + else if (p_ea) + { + minheight = frame_minheight(oldwin->w_frame, NOWIN) + need_status; + prevfrp = oldwin->w_frame; + for (frp = oldwin->w_frame->fr_parent; frp != NULL; + frp = frp->fr_parent) + { + if (frp->fr_layout == FR_COL) + FOR_ALL_FRAMES(frp2, frp->fr_child) + if (frp2 != prevfrp) + minheight += frame_minheight(frp2, NOWIN); + prevfrp = frp; + } + available = topframe->fr_height; + needed += minheight; + } + else + { + minheight = frame_minheight(oldwin->w_frame, NOWIN) + need_status; + available = oldwin->w_frame->fr_height; + needed += minheight; + } + if (available < needed && new_wp == NULL) + { + emsg(_(e_not_enough_room)); + return FAIL; + } + oldwin_height = oldwin->w_height; + if (need_status) + { + oldwin->w_status_height = STATUS_HEIGHT; + oldwin_height -= STATUS_HEIGHT; + } + if (new_size == 0) + new_size = oldwin_height / 2; + if (new_size > available - minheight - STATUS_HEIGHT) + new_size = available - minheight - STATUS_HEIGHT; + if (new_size < wmh1) + new_size = wmh1; + + // if it doesn't fit in the current window, need win_equal() + if (oldwin_height - new_size - STATUS_HEIGHT < p_wmh) + do_equal = TRUE; + + // We don't like to take lines for the new window from a + // 'winfixheight' window. Take them from a window above or below + // instead, if possible. + if (oldwin->w_p_wfh) + { + // Set w_fraction now so that the cursor keeps the same relative + // vertical position using the old height. + set_fraction(oldwin); + did_set_fraction = TRUE; + + win_setheight_win(oldwin->w_height + new_size + STATUS_HEIGHT, + oldwin); + oldwin_height = oldwin->w_height; + if (need_status) + oldwin_height -= STATUS_HEIGHT; + } + + // Only make all windows the same height if one of them (except oldwin) + // is higher than one of the split windows. + if (!do_equal && p_ea && size == 0 && *p_ead != 'h' + && oldwin->w_frame->fr_parent != NULL) + { + frp = oldwin->w_frame->fr_parent->fr_child; + while (frp != NULL) + { + if (frp->fr_win != oldwin && frp->fr_win != NULL + && (frp->fr_win->w_height > new_size + || frp->fr_win->w_height > oldwin_height - new_size + - STATUS_HEIGHT)) + { + do_equal = TRUE; + break; + } + frp = frp->fr_next; + } + } + } + + /* + * allocate new window structure and link it in the window list + */ + if ((flags & WSP_TOP) == 0 + && ((flags & WSP_BOT) + || (flags & WSP_BELOW) + || (!(flags & WSP_ABOVE) + && ( (flags & WSP_VERT) ? p_spr : p_sb)))) + { + // new window below/right of current one + if (new_wp == NULL) + wp = win_alloc(oldwin, FALSE); + else + win_append(oldwin, wp); + } + else + { + if (new_wp == NULL) + wp = win_alloc(oldwin->w_prev, FALSE); + else + win_append(oldwin->w_prev, wp); + } + + if (new_wp == NULL) + { + if (wp == NULL) + return FAIL; + + new_frame(wp); + if (wp->w_frame == NULL) + { + win_free(wp, NULL); + return FAIL; + } + + // make the contents of the new window the same as the current one + win_init(wp, curwin, flags); + } + + /* + * Reorganise the tree of frames to insert the new window. + */ + if (flags & (WSP_TOP | WSP_BOT)) + { + if ((topframe->fr_layout == FR_COL && (flags & WSP_VERT) == 0) + || (topframe->fr_layout == FR_ROW && (flags & WSP_VERT) != 0)) + { + curfrp = topframe->fr_child; + if (flags & WSP_BOT) + while (curfrp->fr_next != NULL) + curfrp = curfrp->fr_next; + } + else + curfrp = topframe; + before = (flags & WSP_TOP); + } + else + { + curfrp = oldwin->w_frame; + if (flags & WSP_BELOW) + before = FALSE; + else if (flags & WSP_ABOVE) + before = TRUE; + else if (flags & WSP_VERT) + before = !p_spr; + else + before = !p_sb; + } + if (curfrp->fr_parent == NULL || curfrp->fr_parent->fr_layout != layout) + { + // Need to create a new frame in the tree to make a branch. + frp = ALLOC_CLEAR_ONE(frame_T); + *frp = *curfrp; + curfrp->fr_layout = layout; + frp->fr_parent = curfrp; + frp->fr_next = NULL; + frp->fr_prev = NULL; + curfrp->fr_child = frp; + curfrp->fr_win = NULL; + curfrp = frp; + if (frp->fr_win != NULL) + oldwin->w_frame = frp; + else + FOR_ALL_FRAMES(frp, frp->fr_child) + frp->fr_parent = curfrp; + } + + if (new_wp == NULL) + frp = wp->w_frame; + else + frp = new_wp->w_frame; + frp->fr_parent = curfrp->fr_parent; + + // Insert the new frame at the right place in the frame list. + if (before) + frame_insert(curfrp, frp); + else + frame_append(curfrp, frp); + + // Set w_fraction now so that the cursor keeps the same relative + // vertical position. + if (!did_set_fraction) + set_fraction(oldwin); + wp->w_fraction = oldwin->w_fraction; + + if (flags & WSP_VERT) + { + wp->w_p_scr = curwin->w_p_scr; + + if (need_status) + { + win_new_height(oldwin, oldwin->w_height - 1); + oldwin->w_status_height = need_status; + } + if (flags & (WSP_TOP | WSP_BOT)) + { + // set height and row of new window to full height + wp->w_winrow = tabline_height(); + win_new_height(wp, curfrp->fr_height - (p_ls > 0) + - WINBAR_HEIGHT(wp)); + wp->w_status_height = (p_ls > 0); + } + else + { + // height and row of new window is same as current window + wp->w_winrow = oldwin->w_winrow; + win_new_height(wp, VISIBLE_HEIGHT(oldwin)); + wp->w_status_height = oldwin->w_status_height; + } + frp->fr_height = curfrp->fr_height; + + // "new_size" of the current window goes to the new window, use + // one column for the vertical separator + win_new_width(wp, new_size); + if (before) + wp->w_vsep_width = 1; + else + { + wp->w_vsep_width = oldwin->w_vsep_width; + oldwin->w_vsep_width = 1; + } + if (flags & (WSP_TOP | WSP_BOT)) + { + if (flags & WSP_BOT) + frame_add_vsep(curfrp); + // Set width of neighbor frame + frame_new_width(curfrp, curfrp->fr_width + - (new_size + ((flags & WSP_TOP) != 0)), flags & WSP_TOP, + FALSE); + } + else + win_new_width(oldwin, oldwin->w_width - (new_size + 1)); + if (before) // new window left of current one + { + wp->w_wincol = oldwin->w_wincol; + oldwin->w_wincol += new_size + 1; + } + else // new window right of current one + wp->w_wincol = oldwin->w_wincol + oldwin->w_width + 1; + frame_fix_width(oldwin); + frame_fix_width(wp); + } + else + { + // width and column of new window is same as current window + if (flags & (WSP_TOP | WSP_BOT)) + { + wp->w_wincol = 0; + win_new_width(wp, Columns); + wp->w_vsep_width = 0; + } + else + { + wp->w_wincol = oldwin->w_wincol; + win_new_width(wp, oldwin->w_width); + wp->w_vsep_width = oldwin->w_vsep_width; + } + frp->fr_width = curfrp->fr_width; + + // "new_size" of the current window goes to the new window, use + // one row for the status line + win_new_height(wp, new_size); + if (flags & (WSP_TOP | WSP_BOT)) + { + int new_fr_height = curfrp->fr_height - new_size + + WINBAR_HEIGHT(wp) ; + + if (!((flags & WSP_BOT) && p_ls == 0)) + new_fr_height -= STATUS_HEIGHT; + frame_new_height(curfrp, new_fr_height, flags & WSP_TOP, FALSE); + } + else + win_new_height(oldwin, oldwin_height - (new_size + STATUS_HEIGHT)); + if (before) // new window above current one + { + wp->w_winrow = oldwin->w_winrow; + wp->w_status_height = STATUS_HEIGHT; + oldwin->w_winrow += wp->w_height + STATUS_HEIGHT; + } + else // new window below current one + { + wp->w_winrow = oldwin->w_winrow + VISIBLE_HEIGHT(oldwin) + + STATUS_HEIGHT; + wp->w_status_height = oldwin->w_status_height; + if (!(flags & WSP_BOT)) + oldwin->w_status_height = STATUS_HEIGHT; + } + if (flags & WSP_BOT) + frame_add_statusline(curfrp); + frame_fix_height(wp); + frame_fix_height(oldwin); + } + + if (flags & (WSP_TOP | WSP_BOT)) + (void)win_comp_pos(); + + // Both windows need redrawing. Update all status lines, in case they + // show something related to the window count or position. + redraw_win_later(wp, UPD_NOT_VALID); + redraw_win_later(oldwin, UPD_NOT_VALID); + status_redraw_all(); + + if (need_status) + { + msg_row = Rows - 1; + msg_col = sc_col; + msg_clr_eos_force(); // Old command/ruler may still be there + comp_col(); + msg_row = Rows - 1; + msg_col = 0; // put position back at start of line + } + + /* + * equalize the window sizes. + */ + if (do_equal || dir != 0) + win_equal(wp, TRUE, + (flags & WSP_VERT) ? (dir == 'v' ? 'b' : 'h') + : dir == 'h' ? 'b' : 'v'); + else if (*p_spk != 'c' && !is_aucmd_win(wp)) + win_fix_scroll(FALSE); + + // Don't change the window height/width to 'winheight' / 'winwidth' if a + // size was given. + if (flags & WSP_VERT) + { + i = p_wiw; + if (size != 0) + p_wiw = size; + +# ifdef FEAT_GUI + // When 'guioptions' includes 'L' or 'R' may have to add scrollbars. + if (gui.in_use) + gui_init_which_components(NULL); +# endif + } + else + { + i = p_wh; + if (size != 0) + p_wh = size; + } + + /* + * make the new window the current window + */ + (void)win_enter_ext(wp, WEE_TRIGGER_NEW_AUTOCMDS + | WEE_TRIGGER_ENTER_AUTOCMDS | WEE_TRIGGER_LEAVE_AUTOCMDS); + if (flags & WSP_VERT) + p_wiw = i; + else + p_wh = i; + + return OK; +} + + +/* + * Initialize window "newp" from window "oldp". + * Used when splitting a window and when creating a new tab page. + * The windows will both edit the same buffer. + * WSP_NEWLOC may be specified in flags to prevent the location list from + * being copied. + */ + static void +win_init(win_T *newp, win_T *oldp, int flags UNUSED) +{ + int i; + + newp->w_buffer = oldp->w_buffer; +#ifdef FEAT_SYN_HL + newp->w_s = &(oldp->w_buffer->b_s); +#endif + oldp->w_buffer->b_nwindows++; + newp->w_cursor = oldp->w_cursor; + newp->w_valid = 0; + newp->w_curswant = oldp->w_curswant; + newp->w_set_curswant = oldp->w_set_curswant; + newp->w_topline = oldp->w_topline; +#ifdef FEAT_DIFF + newp->w_topfill = oldp->w_topfill; +#endif + newp->w_leftcol = oldp->w_leftcol; + newp->w_pcmark = oldp->w_pcmark; + newp->w_prev_pcmark = oldp->w_prev_pcmark; + newp->w_alt_fnum = oldp->w_alt_fnum; + newp->w_wrow = oldp->w_wrow; + newp->w_fraction = oldp->w_fraction; + newp->w_prev_fraction_row = oldp->w_prev_fraction_row; + copy_jumplist(oldp, newp); +#ifdef FEAT_QUICKFIX + if (flags & WSP_NEWLOC) + { + // Don't copy the location list. + newp->w_llist = NULL; + newp->w_llist_ref = NULL; + } + else + copy_loclist_stack(oldp, newp); +#endif + newp->w_localdir = (oldp->w_localdir == NULL) + ? NULL : vim_strsave(oldp->w_localdir); + newp->w_prevdir = (oldp->w_prevdir == NULL) + ? NULL : vim_strsave(oldp->w_prevdir); + + if (*p_spk != 'c') + { + newp->w_botline = oldp->w_botline; + newp->w_prev_height = oldp->w_height - WINBAR_HEIGHT(oldp); + newp->w_prev_winrow = oldp->w_winrow + 2 * WINBAR_HEIGHT(oldp); + } + + // copy tagstack and folds + for (i = 0; i < oldp->w_tagstacklen; i++) + { + taggy_T *tag = &newp->w_tagstack[i]; + *tag = oldp->w_tagstack[i]; + if (tag->tagname != NULL) + tag->tagname = vim_strsave(tag->tagname); + if (tag->user_data != NULL) + tag->user_data = vim_strsave(tag->user_data); + } + newp->w_tagstackidx = oldp->w_tagstackidx; + newp->w_tagstacklen = oldp->w_tagstacklen; + + // Keep same changelist position in new window. + newp->w_changelistidx = oldp->w_changelistidx; + +#ifdef FEAT_FOLDING + copyFoldingState(oldp, newp); +#endif + + win_init_some(newp, oldp); +#ifdef FEAT_TERMINAL + term_update_wincolor(newp); +#endif +} + +/* + * Initialize window "newp" from window "old". + * Only the essential things are copied. + */ + static void +win_init_some(win_T *newp, win_T *oldp) +{ + // Use the same argument list. + newp->w_alist = oldp->w_alist; + ++newp->w_alist->al_refcount; + newp->w_arg_idx = oldp->w_arg_idx; + + // copy options from existing window + win_copy_options(oldp, newp); +} + +/* + * Return TRUE if "win" is a global popup or a popup in the current tab page. + */ + int +win_valid_popup(win_T *win UNUSED) +{ +#ifdef FEAT_PROP_POPUP + win_T *wp; + + FOR_ALL_POPUPWINS(wp) + if (wp == win) + return TRUE; + FOR_ALL_POPUPWINS_IN_TAB(curtab, wp) + if (wp == win) + return TRUE; +#endif + return FALSE; +} + +/* + * Check if "win" is a pointer to an existing window in the current tab page. + */ + int +win_valid(win_T *win) +{ + win_T *wp; + + if (win == NULL) + return FALSE; + FOR_ALL_WINDOWS(wp) + if (wp == win) + return TRUE; + return win_valid_popup(win); +} + +/* + * Find window "id" in the current tab page. + * Also find popup windows. + * Return NULL if not found. + */ + win_T * +win_find_by_id(int id) +{ + win_T *wp; + + FOR_ALL_WINDOWS(wp) + if (wp->w_id == id) + return wp; +#ifdef FEAT_PROP_POPUP + FOR_ALL_POPUPWINS(wp) + if (wp->w_id == id) + return wp; + FOR_ALL_POPUPWINS_IN_TAB(curtab, wp) + if (wp->w_id == id) + return wp; +#endif + return NULL; +} + +/* + * Check if "win" is a pointer to an existing window in any tab page. + */ + int +win_valid_any_tab(win_T *win) +{ + win_T *wp; + tabpage_T *tp; + + if (win == NULL) + return FALSE; + FOR_ALL_TABPAGES(tp) + { + FOR_ALL_WINDOWS_IN_TAB(tp, wp) + { + if (wp == win) + return TRUE; + } +#ifdef FEAT_PROP_POPUP + FOR_ALL_POPUPWINS_IN_TAB(tp, wp) + if (wp == win) + return TRUE; +#endif + } + return win_valid_popup(win); +} + +/* + * Return the number of windows. + */ + int +win_count(void) +{ + win_T *wp; + int count = 0; + + FOR_ALL_WINDOWS(wp) + ++count; + return count; +} + +/* + * Make "count" windows on the screen. + * Return actual number of windows on the screen. + * Must be called when there is just one window, filling the whole screen + * (excluding the command line). + */ + int +make_windows( + int count, + int vertical UNUSED) // split windows vertically if TRUE +{ + int maxcount; + int todo; + + if (vertical) + { + // Each window needs at least 'winminwidth' lines and a separator + // column. + maxcount = (curwin->w_width + curwin->w_vsep_width + - (p_wiw - p_wmw)) / (p_wmw + 1); + } + else + { + // Each window needs at least 'winminheight' lines and a status line. + maxcount = (VISIBLE_HEIGHT(curwin) + curwin->w_status_height + - (p_wh - p_wmh)) / (p_wmh + STATUS_HEIGHT); + } + + if (maxcount < 2) + maxcount = 2; + if (count > maxcount) + count = maxcount; + + /* + * add status line now, otherwise first window will be too big + */ + if (count > 1) + last_status(TRUE); + + /* + * Don't execute autocommands while creating the windows. Must do that + * when putting the buffers in the windows. + */ + block_autocmds(); + + // todo is number of windows left to create + for (todo = count - 1; todo > 0; --todo) + if (vertical) + { + if (win_split(curwin->w_width - (curwin->w_width - todo) + / (todo + 1) - 1, WSP_VERT | WSP_ABOVE) == FAIL) + break; + } + else + { + if (win_split(curwin->w_height - (curwin->w_height - todo + * STATUS_HEIGHT) / (todo + 1) + - STATUS_HEIGHT, WSP_ABOVE) == FAIL) + break; + } + + unblock_autocmds(); + + // return actual number of windows + return (count - todo); +} + +/* + * Exchange current and next window + */ + static void +win_exchange(long Prenum) +{ + frame_T *frp; + frame_T *frp2; + win_T *wp; + win_T *wp2; + int temp; + + if (ERROR_IF_ANY_POPUP_WINDOW) + return; + if (ONE_WINDOW) // just one window + { + beep_flush(); + return; + } + +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + + /* + * find window to exchange with + */ + if (Prenum) + { + frp = curwin->w_frame->fr_parent->fr_child; + while (frp != NULL && --Prenum > 0) + frp = frp->fr_next; + } + else if (curwin->w_frame->fr_next != NULL) // Swap with next + frp = curwin->w_frame->fr_next; + else // Swap last window in row/col with previous + frp = curwin->w_frame->fr_prev; + + // We can only exchange a window with another window, not with a frame + // containing windows. + if (frp == NULL || frp->fr_win == NULL || frp->fr_win == curwin) + return; + wp = frp->fr_win; + +/* + * 1. remove curwin from the list. Remember after which window it was in wp2 + * 2. insert curwin before wp in the list + * if wp != wp2 + * 3. remove wp from the list + * 4. insert wp after wp2 + * 5. exchange the status line height and vsep width. + */ + wp2 = curwin->w_prev; + frp2 = curwin->w_frame->fr_prev; + if (wp->w_prev != curwin) + { + win_remove(curwin, NULL); + frame_remove(curwin->w_frame); + win_append(wp->w_prev, curwin); + frame_insert(frp, curwin->w_frame); + } + if (wp != wp2) + { + win_remove(wp, NULL); + frame_remove(wp->w_frame); + win_append(wp2, wp); + if (frp2 == NULL) + frame_insert(wp->w_frame->fr_parent->fr_child, wp->w_frame); + else + frame_append(frp2, wp->w_frame); + } + temp = curwin->w_status_height; + curwin->w_status_height = wp->w_status_height; + wp->w_status_height = temp; + temp = curwin->w_vsep_width; + curwin->w_vsep_width = wp->w_vsep_width; + wp->w_vsep_width = temp; + + frame_fix_height(curwin); + frame_fix_height(wp); + frame_fix_width(curwin); + frame_fix_width(wp); + + (void)win_comp_pos(); // recompute window positions + + if (wp->w_buffer != curbuf) + reset_VIsual_and_resel(); + else if (VIsual_active) + wp->w_cursor = curwin->w_cursor; + + win_enter(wp, TRUE); + redraw_all_later(UPD_NOT_VALID); +} + +/* + * rotate windows: if upwards TRUE the second window becomes the first one + * if upwards FALSE the first window becomes the second one + */ + static void +win_rotate(int upwards, int count) +{ + win_T *wp1; + win_T *wp2; + frame_T *frp; + int n; + + if (ONE_WINDOW) // nothing to do + { + beep_flush(); + return; + } + +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + + // Check if all frames in this row/col have one window. + FOR_ALL_FRAMES(frp, curwin->w_frame->fr_parent->fr_child) + if (frp->fr_win == NULL) + { + emsg(_(e_cannot_rotate_when_another_window_is_split)); + return; + } + + while (count--) + { + if (upwards) // first window becomes last window + { + // remove first window/frame from the list + frp = curwin->w_frame->fr_parent->fr_child; + wp1 = frp->fr_win; + win_remove(wp1, NULL); + frame_remove(frp); + + // find last frame and append removed window/frame after it + for ( ; frp->fr_next != NULL; frp = frp->fr_next) + ; + win_append(frp->fr_win, wp1); + frame_append(frp, wp1->w_frame); + + wp2 = frp->fr_win; // previously last window + } + else // last window becomes first window + { + // find last window/frame in the list and remove it + for (frp = curwin->w_frame; frp->fr_next != NULL; + frp = frp->fr_next) + ; + wp1 = frp->fr_win; + wp2 = wp1->w_prev; // will become last window + win_remove(wp1, NULL); + frame_remove(frp); + + // append the removed window/frame before the first in the list + win_append(frp->fr_parent->fr_child->fr_win->w_prev, wp1); + frame_insert(frp->fr_parent->fr_child, frp); + } + + // exchange status height and vsep width of old and new last window + n = wp2->w_status_height; + wp2->w_status_height = wp1->w_status_height; + wp1->w_status_height = n; + frame_fix_height(wp1); + frame_fix_height(wp2); + n = wp2->w_vsep_width; + wp2->w_vsep_width = wp1->w_vsep_width; + wp1->w_vsep_width = n; + frame_fix_width(wp1); + frame_fix_width(wp2); + + // recompute w_winrow and w_wincol for all windows + (void)win_comp_pos(); + } + + redraw_all_later(UPD_NOT_VALID); +} + +/* + * Move the current window to the very top/bottom/left/right of the screen. + */ + static void +win_totop(int size, int flags) +{ + int dir; + int height = curwin->w_height; + + if (ONE_WINDOW) + { + beep_flush(); + return; + } + if (check_split_disallowed() == FAIL) + return; + + // Remove the window and frame from the tree of frames. + (void)winframe_remove(curwin, &dir, NULL); + win_remove(curwin, NULL); + last_status(FALSE); // may need to remove last status line + (void)win_comp_pos(); // recompute window positions + + // Split a window on the desired side and put the window there. + (void)win_split_ins(size, flags, curwin, dir); + if (!(flags & WSP_VERT)) + { + win_setheight(height); + if (p_ea) + win_equal(curwin, TRUE, 'v'); + } + +#if defined(FEAT_GUI) + // When 'guioptions' includes 'L' or 'R' may have to remove or add + // scrollbars. Have to update them anyway. + gui_may_update_scrollbars(); +#endif +} + +/* + * Move window "win1" to below/right of "win2" and make "win1" the current + * window. Only works within the same frame! + */ + void +win_move_after(win_T *win1, win_T *win2) +{ + int height; + + // check if the arguments are reasonable + if (win1 == win2) + return; + + // check if there is something to do + if (win2->w_next != win1) + { + if (win1->w_frame->fr_parent != win2->w_frame->fr_parent) + { + iemsg("INTERNAL: trying to move a window into another frame"); + return; + } + + // may need to move the status line/vertical separator of the last + // window + if (win1 == lastwin) + { + height = win1->w_prev->w_status_height; + win1->w_prev->w_status_height = win1->w_status_height; + win1->w_status_height = height; + if (win1->w_prev->w_vsep_width == 1) + { + // Remove the vertical separator from the last-but-one window, + // add it to the last window. Adjust the frame widths. + win1->w_prev->w_vsep_width = 0; + win1->w_prev->w_frame->fr_width -= 1; + win1->w_vsep_width = 1; + win1->w_frame->fr_width += 1; + } + } + else if (win2 == lastwin) + { + height = win1->w_status_height; + win1->w_status_height = win2->w_status_height; + win2->w_status_height = height; + if (win1->w_vsep_width == 1) + { + // Remove the vertical separator from win1, add it to the last + // window, win2. Adjust the frame widths. + win2->w_vsep_width = 1; + win2->w_frame->fr_width += 1; + win1->w_vsep_width = 0; + win1->w_frame->fr_width -= 1; + } + } + win_remove(win1, NULL); + frame_remove(win1->w_frame); + win_append(win2, win1); + frame_append(win2->w_frame, win1->w_frame); + + (void)win_comp_pos(); // recompute w_winrow for all windows + redraw_later(UPD_NOT_VALID); + } + win_enter(win1, FALSE); +} + +/* + * Make all windows the same height. + * 'next_curwin' will soon be the current window, make sure it has enough + * rows. + */ + void +win_equal( + win_T *next_curwin, // pointer to current window to be or NULL + int current, // do only frame with current window + int dir) // 'v' for vertically, 'h' for horizontally, + // 'b' for both, 0 for using p_ead +{ + if (dir == 0) + dir = *p_ead; + win_equal_rec(next_curwin == NULL ? curwin : next_curwin, current, + topframe, dir, 0, tabline_height(), + (int)Columns, topframe->fr_height); + if (*p_spk != 'c' && !is_aucmd_win(next_curwin)) + win_fix_scroll(TRUE); +} + +/* + * Set a frame to a new position and height, spreading the available room + * equally over contained frames. + * The window "next_curwin" (if not NULL) should at least get the size from + * 'winheight' and 'winwidth' if possible. + */ + static void +win_equal_rec( + win_T *next_curwin, // pointer to current window to be or NULL + int current, // do only frame with current window + frame_T *topfr, // frame to set size off + int dir, // 'v', 'h' or 'b', see win_equal() + int col, // horizontal position for frame + int row, // vertical position for frame + int width, // new width of frame + int height) // new height of frame +{ + int n, m; + int extra_sep = 0; + int wincount, totwincount = 0; + frame_T *fr; + int next_curwin_size = 0; + int room = 0; + int new_size; + int has_next_curwin = 0; + int hnc; + + if (topfr->fr_layout == FR_LEAF) + { + // Set the width/height of this frame. + // Redraw when size or position changes + if (topfr->fr_height != height || topfr->fr_win->w_winrow != row + || topfr->fr_width != width || topfr->fr_win->w_wincol != col + ) + { + topfr->fr_win->w_winrow = row; + frame_new_height(topfr, height, FALSE, FALSE); + topfr->fr_win->w_wincol = col; + frame_new_width(topfr, width, FALSE, FALSE); + redraw_all_later(UPD_NOT_VALID); + } + } + else if (topfr->fr_layout == FR_ROW) + { + topfr->fr_width = width; + topfr->fr_height = height; + + if (dir != 'v') // equalize frame widths + { + // Compute the maximum number of windows horizontally in this + // frame. + n = frame_minwidth(topfr, NOWIN); + // add one for the rightmost window, it doesn't have a separator + if (col + width == Columns) + extra_sep = 1; + else + extra_sep = 0; + totwincount = (n + extra_sep) / (p_wmw + 1); + has_next_curwin = frame_has_win(topfr, next_curwin); + + /* + * Compute width for "next_curwin" window and room available for + * other windows. + * "m" is the minimal width when counting p_wiw for "next_curwin". + */ + m = frame_minwidth(topfr, next_curwin); + room = width - m; + if (room < 0) + { + next_curwin_size = p_wiw + room; + room = 0; + } + else + { + next_curwin_size = -1; + FOR_ALL_FRAMES(fr, topfr->fr_child) + { + if (!frame_fixed_width(fr)) + continue; + // If 'winfixwidth' set keep the window width if possible. + // Watch out for this window being the next_curwin. + n = frame_minwidth(fr, NOWIN); + new_size = fr->fr_width; + if (frame_has_win(fr, next_curwin)) + { + room += p_wiw - p_wmw; + next_curwin_size = 0; + if (new_size < p_wiw) + new_size = p_wiw; + } + else + // These windows don't use up room. + totwincount -= (n + (fr->fr_next == NULL + ? extra_sep : 0)) / (p_wmw + 1); + room -= new_size - n; + if (room < 0) + { + new_size += room; + room = 0; + } + fr->fr_newwidth = new_size; + } + if (next_curwin_size == -1) + { + if (!has_next_curwin) + next_curwin_size = 0; + else if (totwincount > 1 + && (room + (totwincount - 2)) + / (totwincount - 1) > p_wiw) + { + // Can make all windows wider than 'winwidth', spread + // the room equally. + next_curwin_size = (room + p_wiw + + (totwincount - 1) * p_wmw + + (totwincount - 1)) / totwincount; + room -= next_curwin_size - p_wiw; + } + else + next_curwin_size = p_wiw; + } + } + + if (has_next_curwin) + --totwincount; // don't count curwin + } + + FOR_ALL_FRAMES(fr, topfr->fr_child) + { + wincount = 1; + if (fr->fr_next == NULL) + // last frame gets all that remains (avoid roundoff error) + new_size = width; + else if (dir == 'v') + new_size = fr->fr_width; + else if (frame_fixed_width(fr)) + { + new_size = fr->fr_newwidth; + wincount = 0; // doesn't count as a sizeable window + } + else + { + // Compute the maximum number of windows horiz. in "fr". + n = frame_minwidth(fr, NOWIN); + wincount = (n + (fr->fr_next == NULL ? extra_sep : 0)) + / (p_wmw + 1); + m = frame_minwidth(fr, next_curwin); + if (has_next_curwin) + hnc = frame_has_win(fr, next_curwin); + else + hnc = FALSE; + if (hnc) // don't count next_curwin + --wincount; + if (totwincount == 0) + new_size = room; + else + new_size = (wincount * room + ((unsigned)totwincount >> 1)) + / totwincount; + if (hnc) // add next_curwin size + { + next_curwin_size -= p_wiw - (m - n); + if (next_curwin_size < 0) + next_curwin_size = 0; + new_size += next_curwin_size; + room -= new_size - next_curwin_size; + } + else + room -= new_size; + new_size += n; + } + + // Skip frame that is full width when splitting or closing a + // window, unless equalizing all frames. + if (!current || dir != 'v' || topfr->fr_parent != NULL + || (new_size != fr->fr_width) + || frame_has_win(fr, next_curwin)) + win_equal_rec(next_curwin, current, fr, dir, col, row, + new_size, height); + col += new_size; + width -= new_size; + totwincount -= wincount; + } + } + else // topfr->fr_layout == FR_COL + { + topfr->fr_width = width; + topfr->fr_height = height; + + if (dir != 'h') // equalize frame heights + { + // Compute maximum number of windows vertically in this frame. + n = frame_minheight(topfr, NOWIN); + // add one for the bottom window if it doesn't have a statusline + if (row + height == cmdline_row && p_ls == 0) + extra_sep = 1; + else + extra_sep = 0; + totwincount = (n + extra_sep) / (p_wmh + 1); + has_next_curwin = frame_has_win(topfr, next_curwin); + + /* + * Compute height for "next_curwin" window and room available for + * other windows. + * "m" is the minimal height when counting p_wh for "next_curwin". + */ + m = frame_minheight(topfr, next_curwin); + room = height - m; + if (room < 0) + { + // The room is less than 'winheight', use all space for the + // current window. + next_curwin_size = p_wh + room; + room = 0; + } + else + { + next_curwin_size = -1; + FOR_ALL_FRAMES(fr, topfr->fr_child) + { + if (!frame_fixed_height(fr)) + continue; + // If 'winfixheight' set keep the window height if + // possible. + // Watch out for this window being the next_curwin. + n = frame_minheight(fr, NOWIN); + new_size = fr->fr_height; + if (frame_has_win(fr, next_curwin)) + { + room += p_wh - p_wmh; + next_curwin_size = 0; + if (new_size < p_wh) + new_size = p_wh; + } + else + // These windows don't use up room. + totwincount -= (n + (fr->fr_next == NULL + ? extra_sep : 0)) / (p_wmh + 1); + room -= new_size - n; + if (room < 0) + { + new_size += room; + room = 0; + } + fr->fr_newheight = new_size; + } + if (next_curwin_size == -1) + { + if (!has_next_curwin) + next_curwin_size = 0; + else if (totwincount > 1 + && (room + (totwincount - 2)) + / (totwincount - 1) > p_wh) + { + // can make all windows higher than 'winheight', + // spread the room equally. + next_curwin_size = (room + p_wh + + (totwincount - 1) * p_wmh + + (totwincount - 1)) / totwincount; + room -= next_curwin_size - p_wh; + } + else + next_curwin_size = p_wh; + } + } + + if (has_next_curwin) + --totwincount; // don't count curwin + } + + FOR_ALL_FRAMES(fr, topfr->fr_child) + { + wincount = 1; + if (fr->fr_next == NULL) + // last frame gets all that remains (avoid roundoff error) + new_size = height; + else if (dir == 'h') + new_size = fr->fr_height; + else if (frame_fixed_height(fr)) + { + new_size = fr->fr_newheight; + wincount = 0; // doesn't count as a sizeable window + } + else + { + // Compute the maximum number of windows vert. in "fr". + n = frame_minheight(fr, NOWIN); + wincount = (n + (fr->fr_next == NULL ? extra_sep : 0)) + / (p_wmh + 1); + m = frame_minheight(fr, next_curwin); + if (has_next_curwin) + hnc = frame_has_win(fr, next_curwin); + else + hnc = FALSE; + if (hnc) // don't count next_curwin + --wincount; + if (totwincount == 0) + new_size = room; + else + new_size = (wincount * room + ((unsigned)totwincount >> 1)) + / totwincount; + if (hnc) // add next_curwin size + { + next_curwin_size -= p_wh - (m - n); + new_size += next_curwin_size; + room -= new_size - next_curwin_size; + } + else + room -= new_size; + new_size += n; + } + // Skip frame that is full width when splitting or closing a + // window, unless equalizing all frames. + if (!current || dir != 'h' || topfr->fr_parent != NULL + || (new_size != fr->fr_height) + || frame_has_win(fr, next_curwin)) + win_equal_rec(next_curwin, current, fr, dir, col, row, + width, new_size); + row += new_size; + height -= new_size; + totwincount -= wincount; + } + } +} + +#ifdef FEAT_JOB_CHANNEL + static void +leaving_window(win_T *win) +{ + // Only matters for a prompt window. + if (!bt_prompt(win->w_buffer)) + return; + + // When leaving a prompt window stop Insert mode and perhaps restart + // it when entering that window again. + win->w_buffer->b_prompt_insert = restart_edit; + if (restart_edit != 0 && mode_displayed) + clear_cmdline = TRUE; // unshow mode later + restart_edit = NUL; + + // When leaving the window (or closing the window) was done from a + // callback we need to break out of the Insert mode loop and restart Insert + // mode when entering the window again. + if (State & MODE_INSERT) + { + stop_insert_mode = TRUE; + if (win->w_buffer->b_prompt_insert == NUL) + win->w_buffer->b_prompt_insert = 'A'; + } +} + + void +entering_window(win_T *win) +{ + // Only matters for a prompt window. + if (!bt_prompt(win->w_buffer)) + return; + + // When switching to a prompt buffer that was in Insert mode, don't stop + // Insert mode, it may have been set in leaving_window(). + if (win->w_buffer->b_prompt_insert != NUL) + stop_insert_mode = FALSE; + + // When entering the prompt window restart Insert mode if we were in Insert + // mode when we left it and not already in Insert mode. + if ((State & MODE_INSERT) == 0) + restart_edit = win->w_buffer->b_prompt_insert; +} +#endif + + static void +win_init_empty(win_T *wp) +{ + redraw_win_later(wp, UPD_NOT_VALID); + wp->w_lines_valid = 0; + wp->w_cursor.lnum = 1; + wp->w_curswant = wp->w_cursor.col = 0; + wp->w_cursor.coladd = 0; + wp->w_pcmark.lnum = 1; // pcmark not cleared but set to line 1 + wp->w_pcmark.col = 0; + wp->w_prev_pcmark.lnum = 0; + wp->w_prev_pcmark.col = 0; + wp->w_topline = 1; +#ifdef FEAT_DIFF + wp->w_topfill = 0; +#endif + wp->w_botline = 2; +#if defined(FEAT_SYN_HL) || defined(FEAT_SPELL) + wp->w_s = &wp->w_buffer->b_s; +#endif +#ifdef FEAT_TERMINAL + term_reset_wincolor(wp); +#endif +} + +/* + * Init the current window "curwin". + * Called when a new file is being edited. + */ + void +curwin_init(void) +{ + win_init_empty(curwin); +} + +/* + * Close all windows for buffer "buf". + */ + void +close_windows( + buf_T *buf, + int keep_curwin) // don't close "curwin" +{ + win_T *wp; + tabpage_T *tp, *nexttp; + int count = tabpage_index(NULL); + + ++RedrawingDisabled; + + for (wp = firstwin; wp != NULL && !ONE_WINDOW; ) + { + if (wp->w_buffer == buf && (!keep_curwin || wp != curwin) + && !(wp->w_closing || wp->w_buffer->b_locked > 0)) + { + if (win_close(wp, FALSE) == FAIL) + // If closing the window fails give up, to avoid looping + // forever. + break; + + // Start all over, autocommands may change the window layout. + wp = firstwin; + } + else + wp = wp->w_next; + } + + // Also check windows in other tab pages. + for (tp = first_tabpage; tp != NULL; tp = nexttp) + { + nexttp = tp->tp_next; + if (tp != curtab) + FOR_ALL_WINDOWS_IN_TAB(tp, wp) + if (wp->w_buffer == buf + && !(wp->w_closing || wp->w_buffer->b_locked > 0)) + { + win_close_othertab(wp, FALSE, tp); + + // Start all over, the tab page may be closed and + // autocommands may change the window layout. + nexttp = first_tabpage; + break; + } + } + + --RedrawingDisabled; + + if (count != tabpage_index(NULL)) + apply_autocmds(EVENT_TABCLOSED, NULL, NULL, FALSE, curbuf); +} + +/* + * Return TRUE if the current window is the only window that exists (ignoring + * "aucmd_win[]"). + * Returns FALSE if there is a window, possibly in another tab page. + */ + static int +last_window(void) +{ + return (one_window() && first_tabpage->tp_next == NULL); +} + +/* + * Return TRUE if there is only one window other than "aucmd_win[]" in the + * current tab page. + */ + int +one_window(void) +{ + win_T *wp; + int seen_one = FALSE; + + FOR_ALL_WINDOWS(wp) + { + if (!is_aucmd_win(wp)) + { + if (seen_one) + return FALSE; + seen_one = TRUE; + } + } + return TRUE; +} + +/* + * Close the possibly last window in a tab page. + * Returns TRUE when the window was closed already. + */ + static int +close_last_window_tabpage( + win_T *win, + int free_buf, + tabpage_T *prev_curtab) +{ + if (!ONE_WINDOW) + return FALSE; + + buf_T *old_curbuf = curbuf; + + /* + * Closing the last window in a tab page. First go to another tab + * page and then close the window and the tab page. This avoids that + * curwin and curtab are invalid while we are freeing memory, they may + * be used in GUI events. + * Don't trigger autocommands yet, they may use wrong values, so do + * that below. + */ + goto_tabpage_tp(alt_tabpage(), FALSE, TRUE); + + // Safety check: Autocommands may have closed the window when jumping + // to the other tab page. + if (valid_tabpage(prev_curtab) && prev_curtab->tp_firstwin == win) + win_close_othertab(win, free_buf, prev_curtab); +#ifdef FEAT_JOB_CHANNEL + entering_window(curwin); +#endif + // Since goto_tabpage_tp above did not trigger *Enter autocommands, do + // that now. + apply_autocmds(EVENT_TABCLOSED, NULL, NULL, FALSE, curbuf); + apply_autocmds(EVENT_WINENTER, NULL, NULL, FALSE, curbuf); + apply_autocmds(EVENT_TABENTER, NULL, NULL, FALSE, curbuf); + if (old_curbuf != curbuf) + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); + return TRUE; +} + +/* + * Close the buffer of "win" and unload it if "action" is DOBUF_UNLOAD. + * "action" can also be zero (do nothing) or DOBUF_WIPE. + * "abort_if_last" is passed to close_buffer(): abort closing if all other + * windows are closed. + */ + static void +win_close_buffer(win_T *win, int action, int abort_if_last) +{ +#ifdef FEAT_SYN_HL + // Free independent synblock before the buffer is freed. + if (win->w_buffer != NULL) + reset_synblock(win); +#endif + +#ifdef FEAT_QUICKFIX + // When a quickfix/location list window is closed and the buffer is + // displayed in only one window, then unlist the buffer. + if (win->w_buffer != NULL && bt_quickfix(win->w_buffer) + && win->w_buffer->b_nwindows == 1) + win->w_buffer->b_p_bl = FALSE; +#endif + + // Close the link to the buffer. + if (win->w_buffer != NULL) + { + bufref_T bufref; + + set_bufref(&bufref, curbuf); + win->w_closing = TRUE; + close_buffer(win, win->w_buffer, action, abort_if_last, TRUE); + if (win_valid_any_tab(win)) + win->w_closing = FALSE; + // Make sure curbuf is valid. It can become invalid if 'bufhidden' is + // "wipe". + if (!bufref_valid(&bufref)) + curbuf = firstbuf; + } +} + +/* + * Close window "win". Only works for the current tab page. + * If "free_buf" is TRUE related buffer may be unloaded. + * + * Called by :quit, :close, :xit, :wq and findtag(). + * Returns FAIL when the window was not closed. + */ + int +win_close(win_T *win, int free_buf) +{ + win_T *wp; + int other_buffer = FALSE; + int close_curwin = FALSE; + int dir; + int help_window = FALSE; + tabpage_T *prev_curtab = curtab; + frame_T *win_frame = win->w_frame->fr_parent; +#ifdef FEAT_DIFF + int had_diffmode = win->w_p_diff; +#endif +#ifdef MESSAGE_QUEUE + int did_decrement = FALSE; +#endif + +#if defined(FEAT_TERMINAL) && defined(FEAT_PROP_POPUP) + // Can close a popup window with a terminal if the job has finished. + if (may_close_term_popup() == OK) + return OK; +#endif + if (ERROR_IF_ANY_POPUP_WINDOW) + return FAIL; + + if (last_window()) + { + emsg(_(e_cannot_close_last_window)); + return FAIL; + } + if (window_layout_locked(CMD_close)) + return FAIL; + + if (win->w_closing || (win->w_buffer != NULL + && win->w_buffer->b_locked > 0)) + return FAIL; // window is already being closed + if (win_unlisted(win)) + { + emsg(_(e_cannot_close_autocmd_or_popup_window)); + return FAIL; + } + if ((is_aucmd_win(firstwin) || is_aucmd_win(lastwin)) && one_window()) + { + emsg(_(e_cannot_close_window_only_autocmd_window_would_remain)); + return FAIL; + } + + // When closing the last window in a tab page first go to another tab page + // and then close the window and the tab page to avoid that curwin and + // curtab are invalid while we are freeing memory. + if (close_last_window_tabpage(win, free_buf, prev_curtab)) + return FAIL; + + // When closing the help window, try restoring a snapshot after closing + // the window. Otherwise clear the snapshot, it's now invalid. + if (bt_help(win->w_buffer)) + help_window = TRUE; + else + clear_snapshot(curtab, SNAP_HELP_IDX); + + if (win == curwin) + { +#ifdef FEAT_JOB_CHANNEL + leaving_window(curwin); +#endif + /* + * Guess which window is going to be the new current window. + * This may change because of the autocommands (sigh). + */ + wp = frame2win(win_altframe(win, NULL)); + + /* + * Be careful: If autocommands delete the window or cause this window + * to be the last one left, return now. + */ + if (wp->w_buffer != curbuf) + { + reset_VIsual_and_resel(); // stop Visual mode + + other_buffer = TRUE; + win->w_closing = TRUE; + apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf); + if (!win_valid(win)) + return FAIL; + win->w_closing = FALSE; + if (last_window()) + return FAIL; + } + win->w_closing = TRUE; + apply_autocmds(EVENT_WINLEAVE, NULL, NULL, FALSE, curbuf); + if (!win_valid(win)) + return FAIL; + win->w_closing = FALSE; + if (last_window()) + return FAIL; +#ifdef FEAT_EVAL + // autocmds may abort script processing + if (aborting()) + return FAIL; +#endif + } + +#ifdef FEAT_GUI + // Avoid trouble with scrollbars that are going to be deleted in + // win_free(). + if (gui.in_use) + out_flush(); +#endif + +#ifdef FEAT_PROP_POPUP + if (popup_win_closed(win) && !win_valid(win)) + return FAIL; +#endif + + // Trigger WinClosed just before starting to free window-related resources. + trigger_winclosed(win); + // autocmd may have freed the window already. + if (!win_valid_any_tab(win)) + return OK; + + win_close_buffer(win, free_buf ? DOBUF_UNLOAD : 0, TRUE); + + if (only_one_window() && win_valid(win) && win->w_buffer == NULL + && (last_window() || curtab != prev_curtab + || close_last_window_tabpage(win, free_buf, prev_curtab))) + { + // Autocommands have closed all windows, quit now. Restore + // curwin->w_buffer, otherwise writing viminfo may fail. + if (curwin->w_buffer == NULL) + curwin->w_buffer = curbuf; + getout(0); + } + + // Autocommands may have moved to another tab page. + if (curtab != prev_curtab && win_valid_any_tab(win) + && win->w_buffer == NULL) + { + // Need to close the window anyway, since the buffer is NULL. + // Don't trigger autocmds with a NULL buffer. + block_autocmds(); + win_close_othertab(win, FALSE, prev_curtab); + unblock_autocmds(); + return FAIL; + } + + // Autocommands may have closed the window already or closed the only + // other window. + if (!win_valid(win) || last_window() + || close_last_window_tabpage(win, free_buf, prev_curtab)) + return FAIL; + + // Now we are really going to close the window. Disallow any autocommand + // to split a window to avoid trouble. + // Also bail out of parse_queued_messages() to avoid it tries to update the + // screen. + ++split_disallowed; +#ifdef MESSAGE_QUEUE + ++dont_parse_messages; +#endif + + // Free the memory used for the window and get the window that received + // the screen space. + wp = win_free_mem(win, &dir, NULL); + + if (help_window) + { + // Closing the help window moves the cursor back to the current window + // of the snapshot. + win_T *prev_win = get_snapshot_curwin(SNAP_HELP_IDX); + + if (win_valid(prev_win)) + wp = prev_win; + } + + // Make sure curwin isn't invalid. It can cause severe trouble when + // printing an error message. For win_equal() curbuf needs to be valid + // too. + if (win == curwin) + { + curwin = wp; +#ifdef FEAT_QUICKFIX + if (wp->w_p_pvw || bt_quickfix(wp->w_buffer)) + { + /* + * If the cursor goes to the preview or the quickfix window, try + * finding another window to go to. + */ + for (;;) + { + if (wp->w_next == NULL) + wp = firstwin; + else + wp = wp->w_next; + if (wp == curwin) + break; + if (!wp->w_p_pvw && !bt_quickfix(wp->w_buffer)) + { + curwin = wp; + break; + } + } + } +#endif + curbuf = curwin->w_buffer; + close_curwin = TRUE; + + // The cursor position may be invalid if the buffer changed after last + // using the window. + check_cursor(); + } + + /* + * If last window has a status line now and we don't want one, remove the + * status line. Do this before win_equal(), because it may change the + * height of a window + */ + last_status(FALSE); + + if (p_ea && (*p_ead == 'b' || *p_ead == dir)) + // If the frame of the closed window contains the new current window, + // only resize that frame. Otherwise resize all windows. + win_equal(curwin, curwin->w_frame->fr_parent == win_frame, dir); + else + { + win_comp_pos(); + if (*p_spk != 'c') + win_fix_scroll(FALSE); + } + if (close_curwin) + { + // Pass WEE_ALLOW_PARSE_MESSAGES to decrement dont_parse_messages + // before autocommands. +#ifdef MESSAGE_QUEUE + did_decrement = +#else + (void) +#endif + win_enter_ext(wp, + WEE_CURWIN_INVALID | WEE_TRIGGER_ENTER_AUTOCMDS + | WEE_TRIGGER_LEAVE_AUTOCMDS | WEE_ALLOW_PARSE_MESSAGES); + if (other_buffer) + // careful: after this wp and win may be invalid! + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); + } + + --split_disallowed; +#ifdef MESSAGE_QUEUE + if (!did_decrement) + --dont_parse_messages; +#endif + + // After closing the help window, try restoring the window layout from + // before it was opened. + if (help_window) + restore_snapshot(SNAP_HELP_IDX, close_curwin); + +#ifdef FEAT_DIFF + // If the window had 'diff' set and now there is only one window left in + // the tab page with 'diff' set, and "closeoff" is in 'diffopt', then + // execute ":diffoff!". + if (diffopt_closeoff() && had_diffmode && curtab == prev_curtab) + { + int diffcount = 0; + win_T *dwin; + + FOR_ALL_WINDOWS(dwin) + if (dwin->w_p_diff) + ++diffcount; + if (diffcount == 1) + do_cmdline_cmd((char_u *)"diffoff!"); + } +#endif + +#if defined(FEAT_GUI) + // When 'guioptions' includes 'L' or 'R' may have to remove scrollbars. + if (gui.in_use && !win_hasvertsplit()) + gui_init_which_components(NULL); +#endif + + redraw_all_later(UPD_NOT_VALID); + return OK; +} + + static void +trigger_winclosed(win_T *win) +{ + static int recursive = FALSE; + char_u winid[NUMBUFLEN]; + + if (recursive) + return; + recursive = TRUE; + vim_snprintf((char *)winid, sizeof(winid), "%d", win->w_id); + apply_autocmds(EVENT_WINCLOSED, winid, winid, FALSE, win->w_buffer); + recursive = FALSE; +} + +/* + * Make a snapshot of all the window scroll positions and sizes of the current + * tab page. + */ + void +snapshot_windows_scroll_size(void) +{ + win_T *wp; + FOR_ALL_WINDOWS(wp) + { + wp->w_last_topline = wp->w_topline; +#ifdef FEAT_DIFF + wp->w_last_topfill = wp->w_topfill; +#endif + wp->w_last_leftcol = wp->w_leftcol; + wp->w_last_skipcol = wp->w_skipcol; + wp->w_last_width = wp->w_width; + wp->w_last_height = wp->w_height; + } +} + +static int did_initial_scroll_size_snapshot = FALSE; + + void +may_make_initial_scroll_size_snapshot(void) +{ + if (!did_initial_scroll_size_snapshot) + { + did_initial_scroll_size_snapshot = TRUE; + snapshot_windows_scroll_size(); + } +} + +#ifdef FEAT_EVAL +/* + * Create a dictionary with information about size and scroll changes in a + * window. + * Returns the dictionary with refcount set to one. + * Returns NULL when out of memory. + */ + static dict_T * +make_win_info_dict( + int width, + int height, + int topline, +# ifdef FEAT_DIFF + int topfill, +# endif + int leftcol, + int skipcol) +{ + dict_T *d = dict_alloc(); + if (d == NULL) + return NULL; + d->dv_refcount = 1; + + // not actually looping, for breaking out on error + while (1) + { + typval_T tv; + tv.v_lock = 0; + tv.v_type = VAR_NUMBER; + + tv.vval.v_number = width; + if (dict_add_tv(d, "width", &tv) == FAIL) + break; + tv.vval.v_number = height; + if (dict_add_tv(d, "height", &tv) == FAIL) + break; + tv.vval.v_number = topline; + if (dict_add_tv(d, "topline", &tv) == FAIL) + break; +#ifdef FEAT_DIFF + tv.vval.v_number = topfill; +#else + tv.vval.v_number = 0; +#endif + if (dict_add_tv(d, "topfill", &tv) == FAIL) + break; + tv.vval.v_number = leftcol; + if (dict_add_tv(d, "leftcol", &tv) == FAIL) + break; + tv.vval.v_number = skipcol; + if (dict_add_tv(d, "skipcol", &tv) == FAIL) + break; + return d; + } + dict_unref(d); + return NULL; +} +#endif + +// Return values of check_window_scroll_resize(): +#define CWSR_SCROLLED 1 // at least one window scrolled +#define CWSR_RESIZED 2 // at least one window size changed + +/* + * This function is used for three purposes: + * 1. Goes over all windows in the current tab page and returns: + * 0 no scrolling and no size changes found + * CWSR_SCROLLED at least one window scrolled + * CWSR_RESIZED at least one window changed size + * CWSR_SCROLLED + CWSR_RESIZED both + * "size_count" is set to the nr of windows with size changes. + * "first_scroll_win" is set to the first window with any relevant changes. + * "first_size_win" is set to the first window with size changes. + * + * 2. When the first three arguments are NULL and "winlist" is not NULL, + * "winlist" is set to the list of window IDs with size changes. + * + * 3. When the first three arguments are NULL and "v_event" is not NULL, + * information about changed windows is added to "v_event". + */ + static int +check_window_scroll_resize( + int *size_count, + win_T **first_scroll_win, + win_T **first_size_win, + list_T *winlist UNUSED, + dict_T *v_event UNUSED) +{ + int result = 0; +#ifdef FEAT_EVAL + int listidx = 0; + int tot_width = 0; + int tot_height = 0; + int tot_topline = 0; +# ifdef FEAT_DIFF + int tot_topfill = 0; +# endif + int tot_leftcol = 0; + int tot_skipcol = 0; +#endif + + win_T *wp; + FOR_ALL_WINDOWS(wp) + { + int size_changed = wp->w_last_width != wp->w_width + || wp->w_last_height != wp->w_height; + if (size_changed) + { + result |= CWSR_RESIZED; +#ifdef FEAT_EVAL + if (winlist != NULL) + { + // Add this window to the list of changed windows. + typval_T tv; + tv.v_lock = 0; + tv.v_type = VAR_NUMBER; + tv.vval.v_number = wp->w_id; + list_set_item(winlist, listidx++, &tv); + } + else +#endif + if (size_count != NULL) + { + ++*size_count; + if (*first_size_win == NULL) + *first_size_win = wp; + // For WinScrolled the first window with a size change is used + // even when it didn't scroll. + if (*first_scroll_win == NULL) + *first_scroll_win = wp; + } + } + + int scroll_changed = wp->w_last_topline != wp->w_topline +#ifdef FEAT_DIFF + || wp->w_last_topfill != wp->w_topfill +#endif + || wp->w_last_leftcol != wp->w_leftcol + || wp->w_last_skipcol != wp->w_skipcol; + if (scroll_changed) + { + result |= CWSR_SCROLLED; + if (first_scroll_win != NULL && *first_scroll_win == NULL) + *first_scroll_win = wp; + } + +#ifdef FEAT_EVAL + if ((size_changed || scroll_changed) && v_event != NULL) + { + // Add info about this window to the v:event dictionary. + int width = wp->w_width - wp->w_last_width; + int height = wp->w_height - wp->w_last_height; + int topline = wp->w_topline - wp->w_last_topline; +#ifdef FEAT_DIFF + int topfill = wp->w_topfill - wp->w_last_topfill; +#endif + int leftcol = wp->w_leftcol - wp->w_last_leftcol; + int skipcol = wp->w_skipcol - wp->w_last_skipcol; + dict_T *d = make_win_info_dict(width, height, topline, +#ifdef FEAT_DIFF + topfill, +#endif + leftcol, skipcol); + if (d == NULL) + break; + char winid[NUMBUFLEN]; + vim_snprintf(winid, sizeof(winid), "%d", wp->w_id); + if (dict_add_dict(v_event, winid, d) == FAIL) + { + dict_unref(d); + break; + } + --d->dv_refcount; + + tot_width += abs(width); + tot_height += abs(height); + tot_topline += abs(topline); +#ifdef FEAT_DIFF + tot_topfill += abs(topfill); +#endif + tot_leftcol += abs(leftcol); + tot_skipcol += abs(skipcol); + } +#endif + } + +#ifdef FEAT_EVAL + if (v_event != NULL) + { + dict_T *alldict = make_win_info_dict(tot_width, tot_height, tot_topline, +# ifdef FEAT_DIFF + tot_topfill, +# endif + tot_leftcol, tot_skipcol); + if (alldict != NULL) + { + if (dict_add_dict(v_event, "all", alldict) == FAIL) + dict_unref(alldict); + else + --alldict->dv_refcount; + } + } +#endif + + return result; +} + +/* + * Trigger WinScrolled and/or WinResized if any window in the current tab page + * scrolled or changed size. + */ + void +may_trigger_win_scrolled_resized(void) +{ + static int recursive = FALSE; + int do_resize = has_winresized(); + int do_scroll = has_winscrolled(); + + // Do not trigger WinScrolled or WinResized recursively. Do not trigger + // before the initial snapshot of the w_last_ values was made. + if (recursive + || !(do_scroll || do_resize) + || !did_initial_scroll_size_snapshot) + return; + + int size_count = 0; + win_T *first_scroll_win = NULL, *first_size_win = NULL; + int cwsr = check_window_scroll_resize(&size_count, + &first_scroll_win, &first_size_win, + NULL, NULL); + int trigger_resize = do_resize && size_count > 0; + int trigger_scroll = do_scroll && cwsr != 0; + if (!trigger_resize && !trigger_scroll) + return; // no relevant changes +#ifdef FEAT_EVAL + list_T *windows_list = NULL; + if (trigger_resize) + { + // Create the list for v:event.windows before making the snapshot. + windows_list = list_alloc_with_items(size_count); + (void)check_window_scroll_resize(NULL, NULL, NULL, windows_list, NULL); + } + + dict_T *scroll_dict = NULL; + if (trigger_scroll) + { + // Create the dict with entries for v:event before making the snapshot. + scroll_dict = dict_alloc(); + if (scroll_dict != NULL) + { + scroll_dict->dv_refcount = 1; + (void)check_window_scroll_resize(NULL, NULL, NULL, NULL, + scroll_dict); + } + } +#endif + + // WinScrolled/WinResized are triggered only once, even when multiple + // windows scrolled or changed size. Store the current values before + // triggering the event, if a scroll or resize happens as a side effect + // then WinScrolled/WinResized is triggered for that later. + snapshot_windows_scroll_size(); + + // "curwin" may be different from the actual current window, make + // sure it can be restored. + window_layout_lock(); + recursive = TRUE; + + // If both are to be triggered do WinResized first. + if (trigger_resize) + { +#ifdef FEAT_EVAL + save_v_event_T save_v_event; + dict_T *v_event = get_v_event(&save_v_event); + + if (dict_add_list(v_event, "windows", windows_list) == OK) + { + dict_set_items_ro(v_event); +#endif + char_u winid[NUMBUFLEN]; + vim_snprintf((char *)winid, sizeof(winid), "%d", + first_size_win->w_id); + apply_autocmds(EVENT_WINRESIZED, winid, winid, FALSE, + first_size_win->w_buffer); +#ifdef FEAT_EVAL + } + restore_v_event(v_event, &save_v_event); +#endif + } + + if (trigger_scroll +#ifdef FEAT_EVAL + && scroll_dict != NULL +#endif + ) + { +#ifdef FEAT_EVAL + save_v_event_T save_v_event; + dict_T *v_event = get_v_event(&save_v_event); + + // Move the entries from scroll_dict to v_event. + dict_extend(v_event, scroll_dict, (char_u *)"move", NULL); + dict_set_items_ro(v_event); + dict_unref(scroll_dict); +#endif + char_u winid[NUMBUFLEN]; + vim_snprintf((char *)winid, sizeof(winid), "%d", + first_scroll_win->w_id); + apply_autocmds(EVENT_WINSCROLLED, winid, winid, FALSE, + first_scroll_win->w_buffer); +#ifdef FEAT_EVAL + restore_v_event(v_event, &save_v_event); +#endif + } + + recursive = FALSE; + window_layout_unlock(); +} + +/* + * Close window "win" in tab page "tp", which is not the current tab page. + * This may be the last window in that tab page and result in closing the tab, + * thus "tp" may become invalid! + * Caller must check if buffer is hidden and whether the tabline needs to be + * updated. + */ + void +win_close_othertab(win_T *win, int free_buf, tabpage_T *tp) +{ + win_T *wp; + int dir; + tabpage_T *ptp = NULL; + int free_tp = FALSE; + + // Get here with win->w_buffer == NULL when win_close() detects the tab + // page changed. + if (win->w_closing || (win->w_buffer != NULL + && win->w_buffer->b_locked > 0)) + return; // window is already being closed + + // Trigger WinClosed just before starting to free window-related resources. + trigger_winclosed(win); + // autocmd may have freed the window already. + if (!win_valid_any_tab(win)) + return; + + if (win->w_buffer != NULL) + // Close the link to the buffer. + close_buffer(win, win->w_buffer, free_buf ? DOBUF_UNLOAD : 0, + FALSE, TRUE); + + // Careful: Autocommands may have closed the tab page or made it the + // current tab page. + for (ptp = first_tabpage; ptp != NULL && ptp != tp; ptp = ptp->tp_next) + ; + if (ptp == NULL || tp == curtab) + { + // If the buffer was removed from the window we have to give it any + // buffer. + if (win_valid_any_tab(win) && win->w_buffer == NULL) + { + win->w_buffer = firstbuf; + ++firstbuf->b_nwindows; + win_init_empty(win); + } + return; + } + + // Autocommands may have closed the window already. + for (wp = tp->tp_firstwin; wp != NULL && wp != win; wp = wp->w_next) + ; + if (wp == NULL) + return; + + // When closing the last window in a tab page remove the tab page. + if (tp->tp_firstwin == tp->tp_lastwin) + { + int h = tabline_height(); + + if (tp == first_tabpage) + first_tabpage = tp->tp_next; + else + { + for (ptp = first_tabpage; ptp != NULL && ptp->tp_next != tp; + ptp = ptp->tp_next) + ; + if (ptp == NULL) + { + internal_error("win_close_othertab()"); + return; + } + ptp->tp_next = tp->tp_next; + } + free_tp = TRUE; + redraw_tabline = TRUE; + if (h != tabline_height()) + shell_new_rows(); + } + + // Free the memory used for the window. + win_free_mem(win, &dir, tp); + + if (free_tp) + free_tabpage(tp); +} + +/* + * Free the memory used for a window. + * Returns a pointer to the window that got the freed up space. + */ + static win_T * +win_free_mem( + win_T *win, + int *dirp, // set to 'v' or 'h' for direction if 'ea' + tabpage_T *tp) // tab page "win" is in, NULL for current +{ + frame_T *frp; + win_T *wp; + tabpage_T *win_tp = tp == NULL ? curtab : tp; + + // Remove the window and its frame from the tree of frames. + frp = win->w_frame; + wp = winframe_remove(win, dirp, tp); + vim_free(frp); + win_free(win, tp); + + // When deleting the current window in the tab, select a new current + // window. + if (win == win_tp->tp_curwin) + win_tp->tp_curwin = wp; + + return wp; +} + +#if defined(EXITFREE) || defined(PROTO) + void +win_free_all(void) +{ + int dummy; + + // avoid an error for switching tabpage with the cmdline window open + cmdwin_type = 0; + + while (first_tabpage->tp_next != NULL) + tabpage_close(TRUE); + + for (int i = 0; i < AUCMD_WIN_COUNT; ++i) + if (aucmd_win[i].auc_win != NULL) + { + (void)win_free_mem(aucmd_win[i].auc_win, &dummy, NULL); + aucmd_win[i].auc_win = NULL; + } + + while (firstwin != NULL) + (void)win_free_mem(firstwin, &dummy, NULL); + + // No window should be used after this. Set curwin to NULL to crash + // instead of using freed memory. + curwin = NULL; +} +#endif + +/* + * Remove a window and its frame from the tree of frames. + * Returns a pointer to the window that got the freed up space. + */ + win_T * +winframe_remove( + win_T *win, + int *dirp UNUSED, // set to 'v' or 'h' for direction if 'ea' + tabpage_T *tp) // tab page "win" is in, NULL for current +{ + frame_T *frp, *frp2, *frp3; + frame_T *frp_close = win->w_frame; + win_T *wp; + + /* + * If there is only one window there is nothing to remove. + */ + if (tp == NULL ? ONE_WINDOW : tp->tp_firstwin == tp->tp_lastwin) + return NULL; + + /* + * Remove the window from its frame. + */ + frp2 = win_altframe(win, tp); + wp = frame2win(frp2); + + // Remove this frame from the list of frames. + frame_remove(frp_close); + + if (frp_close->fr_parent->fr_layout == FR_COL) + { + // When 'winfixheight' is set, try to find another frame in the column + // (as close to the closed frame as possible) to distribute the height + // to. + if (frp2->fr_win != NULL && frp2->fr_win->w_p_wfh) + { + frp = frp_close->fr_prev; + frp3 = frp_close->fr_next; + while (frp != NULL || frp3 != NULL) + { + if (frp != NULL) + { + if (!frame_fixed_height(frp)) + { + frp2 = frp; + wp = frame2win(frp2); + break; + } + frp = frp->fr_prev; + } + if (frp3 != NULL) + { + if (frp3->fr_win != NULL && !frp3->fr_win->w_p_wfh) + { + frp2 = frp3; + wp = frp3->fr_win; + break; + } + frp3 = frp3->fr_next; + } + } + } + frame_new_height(frp2, frp2->fr_height + frp_close->fr_height, + frp2 == frp_close->fr_next ? TRUE : FALSE, FALSE); + *dirp = 'v'; + } + else + { + // When 'winfixwidth' is set, try to find another frame in the column + // (as close to the closed frame as possible) to distribute the width + // to. + if (frp2->fr_win != NULL && frp2->fr_win->w_p_wfw) + { + frp = frp_close->fr_prev; + frp3 = frp_close->fr_next; + while (frp != NULL || frp3 != NULL) + { + if (frp != NULL) + { + if (!frame_fixed_width(frp)) + { + frp2 = frp; + wp = frame2win(frp2); + break; + } + frp = frp->fr_prev; + } + if (frp3 != NULL) + { + if (frp3->fr_win != NULL && !frp3->fr_win->w_p_wfw) + { + frp2 = frp3; + wp = frp3->fr_win; + break; + } + frp3 = frp3->fr_next; + } + } + } + frame_new_width(frp2, frp2->fr_width + frp_close->fr_width, + frp2 == frp_close->fr_next ? TRUE : FALSE, FALSE); + *dirp = 'h'; + } + + // If rows/columns go to a window below/right its positions need to be + // updated. Can only be done after the sizes have been updated. + if (frp2 == frp_close->fr_next) + { + int row = win->w_winrow; + int col = win->w_wincol; + + frame_comp_pos(frp2, &row, &col); + } + + if (frp2->fr_next == NULL && frp2->fr_prev == NULL) + { + // There is no other frame in this list, move its info to the parent + // and remove it. + frp2->fr_parent->fr_layout = frp2->fr_layout; + frp2->fr_parent->fr_child = frp2->fr_child; + FOR_ALL_FRAMES(frp, frp2->fr_child) + frp->fr_parent = frp2->fr_parent; + frp2->fr_parent->fr_win = frp2->fr_win; + if (frp2->fr_win != NULL) + frp2->fr_win->w_frame = frp2->fr_parent; + frp = frp2->fr_parent; + if (topframe->fr_child == frp2) + topframe->fr_child = frp; + vim_free(frp2); + + frp2 = frp->fr_parent; + if (frp2 != NULL && frp2->fr_layout == frp->fr_layout) + { + // The frame above the parent has the same layout, have to merge + // the frames into this list. + if (frp2->fr_child == frp) + frp2->fr_child = frp->fr_child; + frp->fr_child->fr_prev = frp->fr_prev; + if (frp->fr_prev != NULL) + frp->fr_prev->fr_next = frp->fr_child; + for (frp3 = frp->fr_child; ; frp3 = frp3->fr_next) + { + frp3->fr_parent = frp2; + if (frp3->fr_next == NULL) + { + frp3->fr_next = frp->fr_next; + if (frp->fr_next != NULL) + frp->fr_next->fr_prev = frp3; + break; + } + } + if (topframe->fr_child == frp) + topframe->fr_child = frp2; + vim_free(frp); + } + } + + return wp; +} + +/* + * Return a pointer to the frame that will receive the empty screen space that + * is left over after "win" is closed. + * + * If 'splitbelow' or 'splitright' is set, the space goes above or to the left + * by default. Otherwise, the free space goes below or to the right. The + * result is that opening a window and then immediately closing it will + * preserve the initial window layout. The 'wfh' and 'wfw' settings are + * respected when possible. + */ + static frame_T * +win_altframe( + win_T *win, + tabpage_T *tp) // tab page "win" is in, NULL for current +{ + frame_T *frp; + frame_T *other_fr, *target_fr; + + if (tp == NULL ? ONE_WINDOW : tp->tp_firstwin == tp->tp_lastwin) + return alt_tabpage()->tp_curwin->w_frame; + + frp = win->w_frame; + + if (frp->fr_prev == NULL) + return frp->fr_next; + if (frp->fr_next == NULL) + return frp->fr_prev; + + // By default the next window will get the space that was abandoned by this + // window + target_fr = frp->fr_next; + other_fr = frp->fr_prev; + + // If this is part of a column of windows and 'splitbelow' is true then the + // previous window will get the space. + if (frp->fr_parent != NULL && frp->fr_parent->fr_layout == FR_COL && p_sb) + { + target_fr = frp->fr_prev; + other_fr = frp->fr_next; + } + + // If this is part of a row of windows, and 'splitright' is true then the + // previous window will get the space. + if (frp->fr_parent != NULL && frp->fr_parent->fr_layout == FR_ROW && p_spr) + { + target_fr = frp->fr_prev; + other_fr = frp->fr_next; + } + + // If 'wfh' or 'wfw' is set for the target and not for the alternate + // window, reverse the selection. + if (frp->fr_parent != NULL && frp->fr_parent->fr_layout == FR_ROW) + { + if (frame_fixed_width(target_fr) && !frame_fixed_width(other_fr)) + target_fr = other_fr; + } + else + { + if (frame_fixed_height(target_fr) && !frame_fixed_height(other_fr)) + target_fr = other_fr; + } + + return target_fr; +} + +/* + * Return the tabpage that will be used if the current one is closed. + */ + static tabpage_T * +alt_tabpage(void) +{ + tabpage_T *tp; + + // Use the next tab page if possible. + if (curtab->tp_next != NULL) + return curtab->tp_next; + + // Find the last but one tab page. + for (tp = first_tabpage; tp->tp_next != curtab; tp = tp->tp_next) + ; + return tp; +} + +/* + * Find the left-upper window in frame "frp". + */ + static win_T * +frame2win(frame_T *frp) +{ + while (frp->fr_win == NULL) + frp = frp->fr_child; + return frp->fr_win; +} + +/* + * Return TRUE if frame "frp" contains window "wp". + */ + static int +frame_has_win(frame_T *frp, win_T *wp) +{ + frame_T *p; + + if (frp->fr_layout == FR_LEAF) + return frp->fr_win == wp; + + FOR_ALL_FRAMES(p, frp->fr_child) + if (frame_has_win(p, wp)) + return TRUE; + return FALSE; +} + +/* + * Set a new height for a frame. Recursively sets the height for contained + * frames and windows. Caller must take care of positions. + */ + static void +frame_new_height( + frame_T *topfrp, + int height, + int topfirst, // resize topmost contained frame first + int wfh) // obey 'winfixheight' when there is a choice; + // may cause the height not to be set +{ + frame_T *frp; + int extra_lines; + int h; + + if (topfrp->fr_win != NULL) + { + // Simple case: just one window. + win_new_height(topfrp->fr_win, + height - topfrp->fr_win->w_status_height + - WINBAR_HEIGHT(topfrp->fr_win)); + } + else if (topfrp->fr_layout == FR_ROW) + { + do + { + // All frames in this row get the same new height. + FOR_ALL_FRAMES(frp, topfrp->fr_child) + { + frame_new_height(frp, height, topfirst, wfh); + if (frp->fr_height > height) + { + // Could not fit the windows, make the whole row higher. + height = frp->fr_height; + break; + } + } + } + while (frp != NULL); + } + else // fr_layout == FR_COL + { + // Complicated case: Resize a column of frames. Resize the bottom + // frame first, frames above that when needed. + + frp = topfrp->fr_child; + if (wfh) + // Advance past frames with one window with 'wfh' set. + while (frame_fixed_height(frp)) + { + frp = frp->fr_next; + if (frp == NULL) + return; // no frame without 'wfh', give up + } + if (!topfirst) + { + // Find the bottom frame of this column + while (frp->fr_next != NULL) + frp = frp->fr_next; + if (wfh) + // Advance back for frames with one window with 'wfh' set. + while (frame_fixed_height(frp)) + frp = frp->fr_prev; + } + + extra_lines = height - topfrp->fr_height; + if (extra_lines < 0) + { + // reduce height of contained frames, bottom or top frame first + while (frp != NULL) + { + h = frame_minheight(frp, NULL); + if (frp->fr_height + extra_lines < h) + { + extra_lines += frp->fr_height - h; + frame_new_height(frp, h, topfirst, wfh); + } + else + { + frame_new_height(frp, frp->fr_height + extra_lines, + topfirst, wfh); + break; + } + if (topfirst) + { + do + frp = frp->fr_next; + while (wfh && frp != NULL && frame_fixed_height(frp)); + } + else + { + do + frp = frp->fr_prev; + while (wfh && frp != NULL && frame_fixed_height(frp)); + } + // Increase "height" if we could not reduce enough frames. + if (frp == NULL) + height -= extra_lines; + } + } + else if (extra_lines > 0) + { + // increase height of bottom or top frame + frame_new_height(frp, frp->fr_height + extra_lines, topfirst, wfh); + } + } + topfrp->fr_height = height; +} + +/* + * Return TRUE if height of frame "frp" should not be changed because of + * the 'winfixheight' option. + */ + static int +frame_fixed_height(frame_T *frp) +{ + // frame with one window: fixed height if 'winfixheight' set. + if (frp->fr_win != NULL) + return frp->fr_win->w_p_wfh; + + if (frp->fr_layout == FR_ROW) + { + // The frame is fixed height if one of the frames in the row is fixed + // height. + FOR_ALL_FRAMES(frp, frp->fr_child) + if (frame_fixed_height(frp)) + return TRUE; + return FALSE; + } + + // frp->fr_layout == FR_COL: The frame is fixed height if all of the + // frames in the row are fixed height. + FOR_ALL_FRAMES(frp, frp->fr_child) + if (!frame_fixed_height(frp)) + return FALSE; + return TRUE; +} + +/* + * Return TRUE if width of frame "frp" should not be changed because of + * the 'winfixwidth' option. + */ + static int +frame_fixed_width(frame_T *frp) +{ + // frame with one window: fixed width if 'winfixwidth' set. + if (frp->fr_win != NULL) + return frp->fr_win->w_p_wfw; + + if (frp->fr_layout == FR_COL) + { + // The frame is fixed width if one of the frames in the row is fixed + // width. + FOR_ALL_FRAMES(frp, frp->fr_child) + if (frame_fixed_width(frp)) + return TRUE; + return FALSE; + } + + // frp->fr_layout == FR_ROW: The frame is fixed width if all of the + // frames in the row are fixed width. + FOR_ALL_FRAMES(frp, frp->fr_child) + if (!frame_fixed_width(frp)) + return FALSE; + return TRUE; +} + +/* + * Add a status line to windows at the bottom of "frp". + * Note: Does not check if there is room! + */ + static void +frame_add_statusline(frame_T *frp) +{ + win_T *wp; + + if (frp->fr_layout == FR_LEAF) + { + wp = frp->fr_win; + if (wp->w_status_height == 0) + { + if (wp->w_height > 0) // don't make it negative + --wp->w_height; + wp->w_status_height = STATUS_HEIGHT; + } + } + else if (frp->fr_layout == FR_ROW) + { + // Handle all the frames in the row. + FOR_ALL_FRAMES(frp, frp->fr_child) + frame_add_statusline(frp); + } + else // frp->fr_layout == FR_COL + { + // Only need to handle the last frame in the column. + for (frp = frp->fr_child; frp->fr_next != NULL; frp = frp->fr_next) + ; + frame_add_statusline(frp); + } +} + +/* + * Set width of a frame. Handles recursively going through contained frames. + * May remove separator line for windows at the right side (for win_close()). + */ + static void +frame_new_width( + frame_T *topfrp, + int width, + int leftfirst, // resize leftmost contained frame first + int wfw) // obey 'winfixwidth' when there is a choice; + // may cause the width not to be set +{ + frame_T *frp; + int extra_cols; + int w; + win_T *wp; + + if (topfrp->fr_layout == FR_LEAF) + { + // Simple case: just one window. + wp = topfrp->fr_win; + // Find out if there are any windows right of this one. + for (frp = topfrp; frp->fr_parent != NULL; frp = frp->fr_parent) + if (frp->fr_parent->fr_layout == FR_ROW && frp->fr_next != NULL) + break; + if (frp->fr_parent == NULL) + wp->w_vsep_width = 0; + win_new_width(wp, width - wp->w_vsep_width); + } + else if (topfrp->fr_layout == FR_COL) + { + do + { + // All frames in this column get the same new width. + FOR_ALL_FRAMES(frp, topfrp->fr_child) + { + frame_new_width(frp, width, leftfirst, wfw); + if (frp->fr_width > width) + { + // Could not fit the windows, make whole column wider. + width = frp->fr_width; + break; + } + } + } while (frp != NULL); + } + else // fr_layout == FR_ROW + { + // Complicated case: Resize a row of frames. Resize the rightmost + // frame first, frames left of it when needed. + + frp = topfrp->fr_child; + if (wfw) + // Advance past frames with one window with 'wfw' set. + while (frame_fixed_width(frp)) + { + frp = frp->fr_next; + if (frp == NULL) + return; // no frame without 'wfw', give up + } + if (!leftfirst) + { + // Find the rightmost frame of this row + while (frp->fr_next != NULL) + frp = frp->fr_next; + if (wfw) + // Advance back for frames with one window with 'wfw' set. + while (frame_fixed_width(frp)) + frp = frp->fr_prev; + } + + extra_cols = width - topfrp->fr_width; + if (extra_cols < 0) + { + // reduce frame width, rightmost frame first + while (frp != NULL) + { + w = frame_minwidth(frp, NULL); + if (frp->fr_width + extra_cols < w) + { + extra_cols += frp->fr_width - w; + frame_new_width(frp, w, leftfirst, wfw); + } + else + { + frame_new_width(frp, frp->fr_width + extra_cols, + leftfirst, wfw); + break; + } + if (leftfirst) + { + do + frp = frp->fr_next; + while (wfw && frp != NULL && frame_fixed_width(frp)); + } + else + { + do + frp = frp->fr_prev; + while (wfw && frp != NULL && frame_fixed_width(frp)); + } + // Increase "width" if we could not reduce enough frames. + if (frp == NULL) + width -= extra_cols; + } + } + else if (extra_cols > 0) + { + // increase width of rightmost frame + frame_new_width(frp, frp->fr_width + extra_cols, leftfirst, wfw); + } + } + topfrp->fr_width = width; +} + +/* + * Add the vertical separator to windows at the right side of "frp". + * Note: Does not check if there is room! + */ + static void +frame_add_vsep(frame_T *frp) +{ + win_T *wp; + + if (frp->fr_layout == FR_LEAF) + { + wp = frp->fr_win; + if (wp->w_vsep_width == 0) + { + if (wp->w_width > 0) // don't make it negative + --wp->w_width; + wp->w_vsep_width = 1; + } + } + else if (frp->fr_layout == FR_COL) + { + // Handle all the frames in the column. + FOR_ALL_FRAMES(frp, frp->fr_child) + frame_add_vsep(frp); + } + else // frp->fr_layout == FR_ROW + { + // Only need to handle the last frame in the row. + frp = frp->fr_child; + while (frp->fr_next != NULL) + frp = frp->fr_next; + frame_add_vsep(frp); + } +} + +/* + * Set frame width from the window it contains. + */ + static void +frame_fix_width(win_T *wp) +{ + wp->w_frame->fr_width = wp->w_width + wp->w_vsep_width; +} + +/* + * Set frame height from the window it contains. + */ + static void +frame_fix_height(win_T *wp) +{ + wp->w_frame->fr_height = VISIBLE_HEIGHT(wp) + wp->w_status_height; +} + +/* + * Compute the minimal height for frame "topfrp". + * Uses the 'winminheight' option. + * When "next_curwin" isn't NULL, use p_wh for this window. + * When "next_curwin" is NOWIN, don't use at least one line for the current + * window. + */ + static int +frame_minheight(frame_T *topfrp, win_T *next_curwin) +{ + frame_T *frp; + int m; + int n; + + if (topfrp->fr_win != NULL) + { + if (topfrp->fr_win == next_curwin) + m = p_wh + topfrp->fr_win->w_status_height; + else + { + // window: minimal height of the window plus status line + m = p_wmh + topfrp->fr_win->w_status_height; + if (topfrp->fr_win == curwin && next_curwin == NULL) + { + // Current window is minimal one line high and WinBar is + // visible. + if (p_wmh == 0) + ++m; + m += WINBAR_HEIGHT(curwin); + } + } + } + else if (topfrp->fr_layout == FR_ROW) + { + // get the minimal height from each frame in this row + m = 0; + FOR_ALL_FRAMES(frp, topfrp->fr_child) + { + n = frame_minheight(frp, next_curwin); + if (n > m) + m = n; + } + } + else + { + // Add up the minimal heights for all frames in this column. + m = 0; + FOR_ALL_FRAMES(frp, topfrp->fr_child) + m += frame_minheight(frp, next_curwin); + } + + return m; +} + +/* + * Compute the minimal width for frame "topfrp". + * When "next_curwin" isn't NULL, use p_wiw for this window. + * When "next_curwin" is NOWIN, don't use at least one column for the current + * window. + */ + static int +frame_minwidth( + frame_T *topfrp, + win_T *next_curwin) // use p_wh and p_wiw for next_curwin +{ + frame_T *frp; + int m, n; + + if (topfrp->fr_win != NULL) + { + if (topfrp->fr_win == next_curwin) + m = p_wiw + topfrp->fr_win->w_vsep_width; + else + { + // window: minimal width of the window plus separator column + m = p_wmw + topfrp->fr_win->w_vsep_width; + // Current window is minimal one column wide + if (p_wmw == 0 && topfrp->fr_win == curwin && next_curwin == NULL) + ++m; + } + } + else if (topfrp->fr_layout == FR_COL) + { + // get the minimal width from each frame in this column + m = 0; + FOR_ALL_FRAMES(frp, topfrp->fr_child) + { + n = frame_minwidth(frp, next_curwin); + if (n > m) + m = n; + } + } + else + { + // Add up the minimal widths for all frames in this row. + m = 0; + FOR_ALL_FRAMES(frp, topfrp->fr_child) + m += frame_minwidth(frp, next_curwin); + } + + return m; +} + + +/* + * Try to close all windows except current one. + * Buffers in the other windows become hidden if 'hidden' is set, or '!' is + * used and the buffer was modified. + * + * Used by ":bdel" and ":only". + */ + void +close_others( + int message, + int forceit) // always hide all other windows +{ + win_T *wp; + win_T *nextwp; + int r; + + if (one_window()) + { + if (message && !autocmd_busy) + msg(_(m_onlyone)); + return; + } + + // Be very careful here: autocommands may change the window layout. + for (wp = firstwin; win_valid(wp); wp = nextwp) + { + nextwp = wp->w_next; + if (wp == curwin) // don't close current window + continue; + + // Check if it's allowed to abandon this window + r = can_abandon(wp->w_buffer, forceit); + if (!win_valid(wp)) // autocommands messed wp up + { + nextwp = firstwin; + continue; + } + if (!r) + { +#if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG) + if (message && (p_confirm + || (cmdmod.cmod_flags & CMOD_CONFIRM)) && p_write) + { + dialog_changed(wp->w_buffer, FALSE); + if (!win_valid(wp)) // autocommands messed wp up + { + nextwp = firstwin; + continue; + } + } + if (bufIsChanged(wp->w_buffer)) +#endif + continue; + } + win_close(wp, !buf_hide(wp->w_buffer) && !bufIsChanged(wp->w_buffer)); + } + + if (message && !ONE_WINDOW) + emsg(_(e_other_window_contains_changes)); +} + +/* + * Store the relevant window pointers for tab page "tp". To be used before + * use_tabpage(). + */ + void +unuse_tabpage(tabpage_T *tp) +{ + tp->tp_topframe = topframe; + tp->tp_firstwin = firstwin; + tp->tp_lastwin = lastwin; + tp->tp_curwin = curwin; +} + +/* + * Set the relevant pointers to use tab page "tp". May want to call + * unuse_tabpage() first. + */ + void +use_tabpage(tabpage_T *tp) +{ + curtab = tp; + topframe = curtab->tp_topframe; + firstwin = curtab->tp_firstwin; + lastwin = curtab->tp_lastwin; + curwin = curtab->tp_curwin; +} + +/* + * Allocate the first window and put an empty buffer in it. + * Called from main(). + * Return FAIL when something goes wrong (out of memory). + */ + int +win_alloc_first(void) +{ + if (win_alloc_firstwin(NULL) == FAIL) + return FAIL; + + first_tabpage = alloc_tabpage(); + if (first_tabpage == NULL) + return FAIL; + curtab = first_tabpage; + unuse_tabpage(first_tabpage); + + return OK; +} + +/* + * Allocate and init a window that is not a regular window. + * This can only be done after the first window is fully initialized, thus it + * can't be in win_alloc_first(). + */ + win_T * +win_alloc_popup_win(void) +{ + win_T *wp; + + wp = win_alloc(NULL, TRUE); + if (wp == NULL) + return NULL; + // We need to initialize options with something, using the current + // window makes most sense. + win_init_some(wp, curwin); + + RESET_BINDING(wp); + new_frame(wp); + return wp; +} + +/* + * Initialize window "wp" to display buffer "buf". + */ + void +win_init_popup_win(win_T *wp, buf_T *buf) +{ + wp->w_buffer = buf; + ++buf->b_nwindows; + win_init_empty(wp); // set cursor and topline to safe values + + // Make sure w_localdir and globaldir are NULL to avoid a chdir() in + // win_enter_ext(). + VIM_CLEAR(wp->w_localdir); +} + +/* + * Allocate the first window or the first window in a new tab page. + * When "oldwin" is NULL create an empty buffer for it. + * When "oldwin" is not NULL copy info from it to the new window. + * Return FAIL when something goes wrong (out of memory). + */ + static int +win_alloc_firstwin(win_T *oldwin) +{ + curwin = win_alloc(NULL, FALSE); + if (curwin == NULL) + return FAIL; + if (oldwin == NULL) + { + // Very first window, need to create an empty buffer for it and + // initialize from scratch. + curbuf = buflist_new(NULL, NULL, 1L, BLN_LISTED); + if (curwin == NULL || curbuf == NULL) + return FAIL; + curwin->w_buffer = curbuf; +#ifdef FEAT_SYN_HL + curwin->w_s = &(curbuf->b_s); +#endif + curbuf->b_nwindows = 1; // there is one window + curwin->w_alist = &global_alist; + curwin_init(); // init current window + } + else + { + // First window in new tab page, initialize it from "oldwin". + win_init(curwin, oldwin, 0); + + // We don't want cursor- and scroll-binding in the first window. + RESET_BINDING(curwin); + } + + new_frame(curwin); + if (curwin->w_frame == NULL) + return FAIL; + topframe = curwin->w_frame; + topframe->fr_width = Columns; + topframe->fr_height = Rows - p_ch; + + return OK; +} + +/* + * Create a frame for window "wp". + */ + static void +new_frame(win_T *wp) +{ + frame_T *frp = ALLOC_CLEAR_ONE(frame_T); + + wp->w_frame = frp; + if (frp == NULL) + return; + frp->fr_layout = FR_LEAF; + frp->fr_win = wp; +} + +/* + * Initialize the window and frame size to the maximum. + */ + void +win_init_size(void) +{ + firstwin->w_height = ROWS_AVAIL; + firstwin->w_prev_height = ROWS_AVAIL; + topframe->fr_height = ROWS_AVAIL; + firstwin->w_width = Columns; + topframe->fr_width = Columns; +} + +/* + * Allocate a new tabpage_T and init the values. + * Returns NULL when out of memory. + */ + static tabpage_T * +alloc_tabpage(void) +{ + tabpage_T *tp; +# ifdef FEAT_GUI + int i; +# endif + + + tp = ALLOC_CLEAR_ONE(tabpage_T); + if (tp == NULL) + return NULL; + +# ifdef FEAT_EVAL + // init t: variables + tp->tp_vars = dict_alloc_id(aid_newtabpage_tvars); + if (tp->tp_vars == NULL) + { + vim_free(tp); + return NULL; + } + init_var_dict(tp->tp_vars, &tp->tp_winvar, VAR_SCOPE); +# endif + +# ifdef FEAT_GUI + for (i = 0; i < 3; i++) + tp->tp_prev_which_scrollbars[i] = -1; +# endif +# ifdef FEAT_DIFF + tp->tp_diff_invalid = TRUE; +# endif + tp->tp_ch_used = p_ch; + + return tp; +} + + void +free_tabpage(tabpage_T *tp) +{ + int idx; + +# ifdef FEAT_DIFF + diff_clear(tp); +# endif +# ifdef FEAT_PROP_POPUP + while (tp->tp_first_popupwin != NULL) + popup_close_tabpage(tp, tp->tp_first_popupwin->w_id, TRUE); +#endif + for (idx = 0; idx < SNAP_COUNT; ++idx) + clear_snapshot(tp, idx); +#ifdef FEAT_EVAL + vars_clear(&tp->tp_vars->dv_hashtab); // free all t: variables + hash_init(&tp->tp_vars->dv_hashtab); + unref_var_dict(tp->tp_vars); +#endif + + if (tp == lastused_tabpage) + lastused_tabpage = NULL; + + vim_free(tp->tp_localdir); + vim_free(tp->tp_prevdir); + +#ifdef FEAT_PYTHON + python_tabpage_free(tp); +#endif + +#ifdef FEAT_PYTHON3 + python3_tabpage_free(tp); +#endif + + vim_free(tp); +} + +/* + * Create a new Tab page with one window. + * It will edit the current buffer, like after ":split". + * When "after" is 0 put it just after the current Tab page. + * Otherwise put it just before tab page "after". + * Return FAIL or OK. + */ + int +win_new_tabpage(int after) +{ + tabpage_T *tp = curtab; + tabpage_T *prev_tp = curtab; + tabpage_T *newtp; + int n; + + if (cmdwin_type != 0) + { + emsg(_(e_invalid_in_cmdline_window)); + return FAIL; + } + if (window_layout_locked(CMD_tabnew)) + return FAIL; + + newtp = alloc_tabpage(); + if (newtp == NULL) + return FAIL; + + // Remember the current windows in this Tab page. + if (leave_tabpage(curbuf, TRUE) == FAIL) + { + vim_free(newtp); + return FAIL; + } + curtab = newtp; + + newtp->tp_localdir = (tp->tp_localdir == NULL) + ? NULL : vim_strsave(tp->tp_localdir); + // Create a new empty window. + if (win_alloc_firstwin(tp->tp_curwin) == OK) + { + // Make the new Tab page the new topframe. + if (after == 1) + { + // New tab page becomes the first one. + newtp->tp_next = first_tabpage; + first_tabpage = newtp; + } + else + { + if (after > 0) + { + // Put new tab page before tab page "after". + n = 2; + for (tp = first_tabpage; tp->tp_next != NULL + && n < after; tp = tp->tp_next) + ++n; + } + newtp->tp_next = tp->tp_next; + tp->tp_next = newtp; + } + newtp->tp_firstwin = newtp->tp_lastwin = newtp->tp_curwin = curwin; + + win_init_size(); + firstwin->w_winrow = tabline_height(); + firstwin->w_prev_winrow = firstwin->w_winrow; + win_comp_scroll(curwin); + + newtp->tp_topframe = topframe; + last_status(FALSE); + + lastused_tabpage = prev_tp; + +#if defined(FEAT_GUI) + // When 'guioptions' includes 'L' or 'R' may have to remove or add + // scrollbars. Have to update them anyway. + gui_may_update_scrollbars(); +#endif +#ifdef FEAT_JOB_CHANNEL + entering_window(curwin); +#endif + + redraw_all_later(UPD_NOT_VALID); + apply_autocmds(EVENT_WINNEW, NULL, NULL, FALSE, curbuf); + apply_autocmds(EVENT_WINENTER, NULL, NULL, FALSE, curbuf); + apply_autocmds(EVENT_TABNEW, NULL, NULL, FALSE, curbuf); + apply_autocmds(EVENT_TABENTER, NULL, NULL, FALSE, curbuf); + return OK; + } + + // Failed, get back the previous Tab page + enter_tabpage(curtab, curbuf, TRUE, TRUE); + return FAIL; +} + +/* + * Open a new tab page if ":tab cmd" was used. It will edit the same buffer, + * like with ":split". + * Returns OK if a new tab page was created, FAIL otherwise. + */ + static int +may_open_tabpage(void) +{ + int n = (cmdmod.cmod_tab == 0) + ? postponed_split_tab : cmdmod.cmod_tab; + + if (n == 0) + return FAIL; + + cmdmod.cmod_tab = 0; // reset it to avoid doing it twice + postponed_split_tab = 0; + return win_new_tabpage(n); +} + +/* + * Create up to "maxcount" tabpages with empty windows. + * Returns the number of resulting tab pages. + */ + int +make_tabpages(int maxcount) +{ + int count = maxcount; + int todo; + + // Limit to 'tabpagemax' tabs. + if (count > p_tpm) + count = p_tpm; + + /* + * Don't execute autocommands while creating the tab pages. Must do that + * when putting the buffers in the windows. + */ + block_autocmds(); + + for (todo = count - 1; todo > 0; --todo) + if (win_new_tabpage(0) == FAIL) + break; + + unblock_autocmds(); + + // return actual number of tab pages + return (count - todo); +} + +/* + * Return TRUE when "tpc" points to a valid tab page. + */ + int +valid_tabpage(tabpage_T *tpc) +{ + tabpage_T *tp; + + FOR_ALL_TABPAGES(tp) + if (tp == tpc) + return TRUE; + return FALSE; +} + +/* + * Return TRUE when "tpc" points to a valid tab page and at least one window is + * valid. + */ + int +valid_tabpage_win(tabpage_T *tpc) +{ + tabpage_T *tp; + win_T *wp; + + FOR_ALL_TABPAGES(tp) + { + if (tp == tpc) + { + FOR_ALL_WINDOWS_IN_TAB(tp, wp) + { + if (win_valid_any_tab(wp)) + return TRUE; + } + return FALSE; + } + } + // shouldn't happen + return FALSE; +} + +/* + * Close tabpage "tab", assuming it has no windows in it. + * There must be another tabpage or this will crash. + */ + void +close_tabpage(tabpage_T *tab) +{ + tabpage_T *ptp; + + if (tab == first_tabpage) + { + first_tabpage = tab->tp_next; + ptp = first_tabpage; + } + else + { + for (ptp = first_tabpage; ptp != NULL && ptp->tp_next != tab; + ptp = ptp->tp_next) + ; + assert(ptp != NULL); + ptp->tp_next = tab->tp_next; + } + + goto_tabpage_tp(ptp, FALSE, FALSE); + free_tabpage(tab); +} + +/* + * Find tab page "n" (first one is 1). Returns NULL when not found. + */ + tabpage_T * +find_tabpage(int n) +{ + tabpage_T *tp; + int i = 1; + + if (n == 0) + return curtab; + + for (tp = first_tabpage; tp != NULL && i != n; tp = tp->tp_next) + ++i; + return tp; +} + +/* + * Get index of tab page "tp". First one has index 1. + * When not found returns number of tab pages plus one. + */ + int +tabpage_index(tabpage_T *ftp) +{ + int i = 1; + tabpage_T *tp; + + for (tp = first_tabpage; tp != NULL && tp != ftp; tp = tp->tp_next) + ++i; + return i; +} + +/* + * Prepare for leaving the current tab page. + * When autocommands change "curtab" we don't leave the tab page and return + * FAIL. + * Careful: When OK is returned need to get a new tab page very very soon! + */ + static int +leave_tabpage( + buf_T *new_curbuf UNUSED, // what is going to be the new curbuf, + // NULL if unknown + int trigger_leave_autocmds UNUSED) +{ + tabpage_T *tp = curtab; + +#ifdef FEAT_JOB_CHANNEL + leaving_window(curwin); +#endif + reset_VIsual_and_resel(); // stop Visual mode + if (trigger_leave_autocmds) + { + if (new_curbuf != curbuf) + { + apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf); + if (curtab != tp) + return FAIL; + } + apply_autocmds(EVENT_WINLEAVE, NULL, NULL, FALSE, curbuf); + if (curtab != tp) + return FAIL; + apply_autocmds(EVENT_TABLEAVE, NULL, NULL, FALSE, curbuf); + if (curtab != tp) + return FAIL; + } + + reset_dragwin(); +#if defined(FEAT_GUI) + // Remove the scrollbars. They may be added back later. + if (gui.in_use) + gui_remove_scrollbars(); +#endif + tp->tp_curwin = curwin; + tp->tp_prevwin = prevwin; + tp->tp_firstwin = firstwin; + tp->tp_lastwin = lastwin; + tp->tp_old_Rows = Rows; + if (tp->tp_old_Columns != -1) + tp->tp_old_Columns = Columns; + firstwin = NULL; + lastwin = NULL; + return OK; +} + +/* + * Start using tab page "tp". + * Only to be used after leave_tabpage() or freeing the current tab page. + * Only trigger *Enter autocommands when trigger_enter_autocmds is TRUE. + * Only trigger *Leave autocommands when trigger_leave_autocmds is TRUE. + */ + static void +enter_tabpage( + tabpage_T *tp, + buf_T *old_curbuf UNUSED, + int trigger_enter_autocmds, + int trigger_leave_autocmds) +{ + int row; + int old_off = tp->tp_firstwin->w_winrow; + win_T *next_prevwin = tp->tp_prevwin; + tabpage_T *last_tab = curtab; + + use_tabpage(tp); + + // We would like doing the TabEnter event first, but we don't have a + // valid current window yet, which may break some commands. + // This triggers autocommands, thus may make "tp" invalid. + (void)win_enter_ext(tp->tp_curwin, WEE_CURWIN_INVALID + | (trigger_enter_autocmds ? WEE_TRIGGER_ENTER_AUTOCMDS : 0) + | (trigger_leave_autocmds ? WEE_TRIGGER_LEAVE_AUTOCMDS : 0)); + prevwin = next_prevwin; + + last_status(FALSE); // status line may appear or disappear + row = win_comp_pos(); // recompute w_winrow for all windows +#ifdef FEAT_DIFF + diff_need_scrollbind = TRUE; +#endif + + // Use the stored value of p_ch, so that it can be different for each tab + // page. + if (p_ch != curtab->tp_ch_used) + clear_cmdline = TRUE; + p_ch = curtab->tp_ch_used; + + // When cmdheight is changed in a tab page with '<C-w>-', cmdline_row is + // changed but p_ch and tp_ch_used are not changed. Thus we also need to + // check cmdline_row. + if (row < cmdline_row && cmdline_row <= Rows - p_ch) + clear_cmdline = TRUE; + + // If there was a click in a window, it won't be usable for a following + // drag. + reset_dragwin(); + + // The tabpage line may have appeared or disappeared, may need to resize + // the frames for that. When the Vim window was resized need to update + // frame sizes too. + if (curtab->tp_old_Rows != Rows || (old_off != firstwin->w_winrow +#ifdef FEAT_GUI_TABLINE + && !gui_use_tabline() +#endif + )) + shell_new_rows(); + if (curtab->tp_old_Columns != Columns) + { + if (starting == 0) + { + shell_new_columns(); // update window widths + curtab->tp_old_Columns = Columns; + } + else + curtab->tp_old_Columns = -1; // update window widths later + } + + lastused_tabpage = last_tab; + +#if defined(FEAT_GUI) + // When 'guioptions' includes 'L' or 'R' may have to remove or add + // scrollbars. Have to update them anyway. + gui_may_update_scrollbars(); +#endif + + // Apply autocommands after updating the display, when 'rows' and + // 'columns' have been set correctly. + if (trigger_enter_autocmds) + { + apply_autocmds(EVENT_TABENTER, NULL, NULL, FALSE, curbuf); + if (old_curbuf != curbuf) + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); + } + + redraw_all_later(UPD_NOT_VALID); +} + +/* + * Go to tab page "n". For ":tab N" and "Ngt". + * When "n" is 9999 go to the last tab page. + */ + void +goto_tabpage(int n) +{ + tabpage_T *tp = NULL; // shut up compiler + tabpage_T *ttp; + int i; + + if (text_locked()) + { + // Not allowed when editing the command line. + text_locked_msg(); + return; + } + + // If there is only one it can't work. + if (first_tabpage->tp_next == NULL) + { + if (n > 1) + beep_flush(); + return; + } + + if (n == 0) + { + // No count, go to next tab page, wrap around end. + if (curtab->tp_next == NULL) + tp = first_tabpage; + else + tp = curtab->tp_next; + } + else if (n < 0) + { + // "gT": go to previous tab page, wrap around end. "N gT" repeats + // this N times. + ttp = curtab; + for (i = n; i < 0; ++i) + { + for (tp = first_tabpage; tp->tp_next != ttp && tp->tp_next != NULL; + tp = tp->tp_next) + ; + ttp = tp; + } + } + else if (n == 9999) + { + // Go to last tab page. + for (tp = first_tabpage; tp->tp_next != NULL; tp = tp->tp_next) + ; + } + else + { + // Go to tab page "n". + tp = find_tabpage(n); + if (tp == NULL) + { + beep_flush(); + return; + } + } + + goto_tabpage_tp(tp, TRUE, TRUE); + +#ifdef FEAT_GUI_TABLINE + if (gui_use_tabline()) + gui_mch_set_curtab(tabpage_index(curtab)); +#endif +} + +/* + * Go to tabpage "tp". + * Only trigger *Enter autocommands when trigger_enter_autocmds is TRUE. + * Only trigger *Leave autocommands when trigger_leave_autocmds is TRUE. + * Note: doesn't update the GUI tab. + */ + void +goto_tabpage_tp( + tabpage_T *tp, + int trigger_enter_autocmds, + int trigger_leave_autocmds) +{ + if (trigger_enter_autocmds || trigger_leave_autocmds) + CHECK_CMDWIN; + + // Don't repeat a message in another tab page. + set_keep_msg(NULL, 0); + + skip_win_fix_scroll = TRUE; + if (tp != curtab && leave_tabpage(tp->tp_curwin->w_buffer, + trigger_leave_autocmds) == OK) + { + if (valid_tabpage(tp)) + enter_tabpage(tp, curbuf, trigger_enter_autocmds, + trigger_leave_autocmds); + else + enter_tabpage(curtab, curbuf, trigger_enter_autocmds, + trigger_leave_autocmds); + } + skip_win_fix_scroll = FALSE; +} + +/* + * Go to the last accessed tab page, if there is one. + * Return OK or FAIL + */ + int +goto_tabpage_lastused(void) +{ + if (!valid_tabpage(lastused_tabpage)) + return FAIL; + + goto_tabpage_tp(lastused_tabpage, TRUE, TRUE); + return OK; +} + +/* + * Enter window "wp" in tab page "tp". + * Also updates the GUI tab. + */ + void +goto_tabpage_win(tabpage_T *tp, win_T *wp) +{ + goto_tabpage_tp(tp, TRUE, TRUE); + if (curtab == tp && win_valid(wp)) + { + win_enter(wp, TRUE); +# ifdef FEAT_GUI_TABLINE + if (gui_use_tabline()) + gui_mch_set_curtab(tabpage_index(curtab)); +# endif + } +} + +/* + * Move the current tab page to after tab page "nr". + */ + void +tabpage_move(int nr) +{ + int n = 1; + tabpage_T *tp, *tp_dst; + + if (first_tabpage->tp_next == NULL) + return; + + for (tp = first_tabpage; tp->tp_next != NULL && n < nr; tp = tp->tp_next) + ++n; + + if (tp == curtab || (nr > 0 && tp->tp_next != NULL + && tp->tp_next == curtab)) + return; + + tp_dst = tp; + + // Remove the current tab page from the list of tab pages. + if (curtab == first_tabpage) + first_tabpage = curtab->tp_next; + else + { + FOR_ALL_TABPAGES(tp) + if (tp->tp_next == curtab) + break; + if (tp == NULL) // "cannot happen" + return; + tp->tp_next = curtab->tp_next; + } + + // Re-insert it at the specified position. + if (nr <= 0) + { + curtab->tp_next = first_tabpage; + first_tabpage = curtab; + } + else + { + curtab->tp_next = tp_dst->tp_next; + tp_dst->tp_next = curtab; + } + + // Need to redraw the tabline. Tab page contents doesn't change. + redraw_tabline = TRUE; +} + + +/* + * Go to another window. + * When jumping to another buffer, stop Visual mode. Do this before + * changing windows so we can yank the selection into the '*' register. + * When jumping to another window on the same buffer, adjust its cursor + * position to keep the same Visual area. + */ + void +win_goto(win_T *wp) +{ +#ifdef FEAT_CONCEAL + win_T *owp = curwin; +#endif + +#ifdef FEAT_PROP_POPUP + if (ERROR_IF_ANY_POPUP_WINDOW) + return; + if (popup_is_popup(wp)) + { + emsg(_(e_not_allowed_to_enter_popup_window)); + return; + } +#endif + if (text_or_buf_locked()) + { + beep_flush(); + return; + } + + if (wp->w_buffer != curbuf) + reset_VIsual_and_resel(); + else if (VIsual_active) + wp->w_cursor = curwin->w_cursor; + +#ifdef FEAT_GUI + need_mouse_correct = TRUE; +#endif + win_enter(wp, TRUE); + +#ifdef FEAT_CONCEAL + // Conceal cursor line in previous window, unconceal in current window. + if (win_valid(owp) && owp->w_p_cole > 0 && !msg_scrolled) + redrawWinline(owp, owp->w_cursor.lnum); + if (curwin->w_p_cole > 0 && !msg_scrolled) + need_cursor_line_redraw = TRUE; +#endif +} + +#if defined(FEAT_PERL) || defined(PROTO) +/* + * Find window number "winnr" (counting top to bottom). + */ + win_T * +win_find_nr(int winnr) +{ + win_T *wp; + + FOR_ALL_WINDOWS(wp) + if (--winnr == 0) + break; + return wp; +} +#endif + +#if ((defined(FEAT_PYTHON) || defined(FEAT_PYTHON3))) || defined(PROTO) +/* + * Find the tabpage for window "win". + */ + tabpage_T * +win_find_tabpage(win_T *win) +{ + win_T *wp; + tabpage_T *tp; + + FOR_ALL_TAB_WINDOWS(tp, wp) + if (wp == win) + return tp; + return NULL; +} +#endif + +/* + * Get the above or below neighbor window of the specified window. + * up - TRUE for the above neighbor + * count - nth neighbor window + * Returns the specified window if the neighbor is not found. + */ + win_T * +win_vert_neighbor(tabpage_T *tp, win_T *wp, int up, long count) +{ + frame_T *fr; + frame_T *nfr; + frame_T *foundfr; + +#ifdef FEAT_PROP_POPUP + if (popup_is_popup(wp)) + // popups don't have neighbors. + return NULL; +#endif + foundfr = wp->w_frame; + while (count--) + { + /* + * First go upwards in the tree of frames until we find a upwards or + * downwards neighbor. + */ + fr = foundfr; + for (;;) + { + if (fr == tp->tp_topframe) + goto end; + if (up) + nfr = fr->fr_prev; + else + nfr = fr->fr_next; + if (fr->fr_parent->fr_layout == FR_COL && nfr != NULL) + break; + fr = fr->fr_parent; + } + + /* + * Now go downwards to find the bottom or top frame in it. + */ + for (;;) + { + if (nfr->fr_layout == FR_LEAF) + { + foundfr = nfr; + break; + } + fr = nfr->fr_child; + if (nfr->fr_layout == FR_ROW) + { + // Find the frame at the cursor row. + while (fr->fr_next != NULL + && frame2win(fr)->w_wincol + fr->fr_width + <= wp->w_wincol + wp->w_wcol) + fr = fr->fr_next; + } + if (nfr->fr_layout == FR_COL && up) + while (fr->fr_next != NULL) + fr = fr->fr_next; + nfr = fr; + } + } +end: + return foundfr != NULL ? foundfr->fr_win : NULL; +} + +/* + * Move to window above or below "count" times. + */ + static void +win_goto_ver( + int up, // TRUE to go to win above + long count) +{ + win_T *win; + +#ifdef FEAT_PROP_POPUP + if (ERROR_IF_TERM_POPUP_WINDOW) + return; +#endif + win = win_vert_neighbor(curtab, curwin, up, count); + if (win != NULL) + win_goto(win); +} + +/* + * Get the left or right neighbor window of the specified window. + * left - TRUE for the left neighbor + * count - nth neighbor window + * Returns the specified window if the neighbor is not found. + */ + win_T * +win_horz_neighbor(tabpage_T *tp, win_T *wp, int left, long count) +{ + frame_T *fr; + frame_T *nfr; + frame_T *foundfr; + +#ifdef FEAT_PROP_POPUP + if (popup_is_popup(wp)) + // popups don't have neighbors. + return NULL; +#endif + foundfr = wp->w_frame; + while (count--) + { + /* + * First go upwards in the tree of frames until we find a left or + * right neighbor. + */ + fr = foundfr; + for (;;) + { + if (fr == tp->tp_topframe) + goto end; + if (left) + nfr = fr->fr_prev; + else + nfr = fr->fr_next; + if (fr->fr_parent->fr_layout == FR_ROW && nfr != NULL) + break; + fr = fr->fr_parent; + } + + /* + * Now go downwards to find the leftmost or rightmost frame in it. + */ + for (;;) + { + if (nfr->fr_layout == FR_LEAF) + { + foundfr = nfr; + break; + } + fr = nfr->fr_child; + if (nfr->fr_layout == FR_COL) + { + // Find the frame at the cursor row. + while (fr->fr_next != NULL + && frame2win(fr)->w_winrow + fr->fr_height + <= wp->w_winrow + wp->w_wrow) + fr = fr->fr_next; + } + if (nfr->fr_layout == FR_ROW && left) + while (fr->fr_next != NULL) + fr = fr->fr_next; + nfr = fr; + } + } +end: + return foundfr != NULL ? foundfr->fr_win : NULL; +} + +/* + * Move to left or right window. + */ + static void +win_goto_hor( + int left, // TRUE to go to left win + long count) +{ + win_T *win; + +#ifdef FEAT_PROP_POPUP + if (ERROR_IF_TERM_POPUP_WINDOW) + return; +#endif + win = win_horz_neighbor(curtab, curwin, left, count); + if (win != NULL) + win_goto(win); +} + +/* + * Make window "wp" the current window. + */ + void +win_enter(win_T *wp, int undo_sync) +{ + (void)win_enter_ext(wp, (undo_sync ? WEE_UNDO_SYNC : 0) + | WEE_TRIGGER_ENTER_AUTOCMDS | WEE_TRIGGER_LEAVE_AUTOCMDS); +} + +/* + * Used after making another window the current one: change directory if + * needed. + */ + static void +fix_current_dir(void) +{ + if (curwin->w_localdir != NULL || curtab->tp_localdir != NULL) + { + char_u *dirname; + + // Window or tab has a local directory: Save current directory as + // global directory (unless that was done already) and change to the + // local directory. + if (globaldir == NULL) + { + char_u cwd[MAXPATHL]; + + if (mch_dirname(cwd, MAXPATHL) == OK) + globaldir = vim_strsave(cwd); + } + if (curwin->w_localdir != NULL) + dirname = curwin->w_localdir; + else + dirname = curtab->tp_localdir; + + if (mch_chdir((char *)dirname) == 0) + { + last_chdir_reason = NULL; + shorten_fnames(TRUE); + } + } + else if (globaldir != NULL) + { + // Window doesn't have a local directory and we are not in the global + // directory: Change to the global directory. + vim_ignored = mch_chdir((char *)globaldir); + VIM_CLEAR(globaldir); + last_chdir_reason = NULL; + shorten_fnames(TRUE); + } +} + +/* + * Make window "wp" the current window. + * Can be called with "flags" containing WEE_CURWIN_INVALID, which means that + * curwin has just been closed and isn't valid. + * Returns TRUE when dont_parse_messages was decremented. + */ + static int +win_enter_ext(win_T *wp, int flags) +{ + int other_buffer = FALSE; + int curwin_invalid = (flags & WEE_CURWIN_INVALID); + int did_decrement = FALSE; + + if (wp == curwin && curwin_invalid == 0) // nothing to do + return FALSE; + +#ifdef FEAT_JOB_CHANNEL + if (curwin_invalid == 0) + leaving_window(curwin); +#endif + + if (curwin_invalid == 0 && (flags & WEE_TRIGGER_LEAVE_AUTOCMDS)) + { + /* + * Be careful: If autocommands delete the window, return now. + */ + if (wp->w_buffer != curbuf) + { + apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, FALSE, curbuf); + other_buffer = TRUE; + if (!win_valid(wp)) + return FALSE; + } + apply_autocmds(EVENT_WINLEAVE, NULL, NULL, FALSE, curbuf); + if (!win_valid(wp)) + return FALSE; +#ifdef FEAT_EVAL + // autocmds may abort script processing + if (aborting()) + return FALSE; +#endif + } + + // sync undo before leaving the current buffer + if ((flags & WEE_UNDO_SYNC) && curbuf != wp->w_buffer) + u_sync(FALSE); + + // Might need to scroll the old window before switching, e.g., when the + // cursor was moved. + if (*p_spk == 'c' && curwin_invalid == 0) + update_topline(); + + // may have to copy the buffer options when 'cpo' contains 'S' + if (wp->w_buffer != curbuf) + buf_copy_options(wp->w_buffer, BCO_ENTER | BCO_NOHELP); + if (curwin_invalid == 0) + { + prevwin = curwin; // remember for CTRL-W p + curwin->w_redr_status = TRUE; + } + curwin = wp; + curbuf = wp->w_buffer; + check_cursor(); + if (!virtual_active()) + curwin->w_cursor.coladd = 0; + if (*p_spk == 'c') // assume cursor position needs updating + changed_line_abv_curs(); + else + // Make sure the cursor position is valid, either by moving the cursor + // or by scrolling the text. + win_fix_cursor( + get_real_state() & (MODE_NORMAL|MODE_CMDLINE|MODE_TERMINAL)); + + // Now it is OK to parse messages again, which may be needed in + // autocommands. +#ifdef MESSAGE_QUEUE + if (flags & WEE_ALLOW_PARSE_MESSAGES) + { + --dont_parse_messages; + did_decrement = TRUE; + } +#endif + + fix_current_dir(); + +#ifdef FEAT_JOB_CHANNEL + entering_window(curwin); +#endif + // Careful: autocommands may close the window and make "wp" invalid + if (flags & WEE_TRIGGER_NEW_AUTOCMDS) + apply_autocmds(EVENT_WINNEW, NULL, NULL, FALSE, curbuf); + if (flags & WEE_TRIGGER_ENTER_AUTOCMDS) + { + apply_autocmds(EVENT_WINENTER, NULL, NULL, FALSE, curbuf); + if (other_buffer) + apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf); + } + + maketitle(); + curwin->w_redr_status = TRUE; +#ifdef FEAT_TERMINAL + if (bt_terminal(curwin->w_buffer)) + // terminal is likely in another mode + redraw_mode = TRUE; +#endif + redraw_tabline = TRUE; + if (restart_edit) + redraw_later(UPD_VALID); // causes status line redraw + + // set window height to desired minimal value + if (curwin->w_height < p_wh && !curwin->w_p_wfh +#ifdef FEAT_PROP_POPUP + && !popup_is_popup(curwin) +#endif + ) + win_setheight((int)p_wh); + else if (curwin->w_height == 0) + win_setheight(1); + + // set window width to desired minimal value + if (curwin->w_width < p_wiw && !curwin->w_p_wfw) + win_setwidth((int)p_wiw); + + setmouse(); // in case jumped to/from help buffer + + // Change directories when the 'acd' option is set. + DO_AUTOCHDIR; + + return did_decrement; +} + +/* + * Jump to the first open window that contains buffer "buf", if one exists. + * Returns a pointer to the window found, otherwise NULL. + */ + win_T * +buf_jump_open_win(buf_T *buf) +{ + win_T *wp = NULL; + + if (curwin->w_buffer == buf) + wp = curwin; + else + FOR_ALL_WINDOWS(wp) + if (wp->w_buffer == buf) + break; + if (wp != NULL) + win_enter(wp, FALSE); + return wp; +} + +/* + * Jump to the first open window in any tab page that contains buffer "buf", + * if one exists. First search in the windows present in the current tab page. + * Returns a pointer to the window found, otherwise NULL. + */ + win_T * +buf_jump_open_tab(buf_T *buf) +{ + win_T *wp = buf_jump_open_win(buf); + tabpage_T *tp; + + if (wp != NULL) + return wp; + + FOR_ALL_TABPAGES(tp) + if (tp != curtab) + { + FOR_ALL_WINDOWS_IN_TAB(tp, wp) + if (wp->w_buffer == buf) + break; + if (wp != NULL) + { + goto_tabpage_win(tp, wp); + if (curwin != wp) + wp = NULL; // something went wrong + break; + } + } + return wp; +} + +static int last_win_id = LOWEST_WIN_ID - 1; + +/* + * Allocate a window structure and link it in the window list when "hidden" is + * FALSE. + */ + static win_T * +win_alloc(win_T *after, int hidden) +{ + win_T *new_wp; + + /* + * allocate window structure and linesizes arrays + */ + new_wp = ALLOC_CLEAR_ONE(win_T); + if (new_wp == NULL) + return NULL; + + if (win_alloc_lines(new_wp) == FAIL) + { + vim_free(new_wp); + return NULL; + } + + new_wp->w_id = ++last_win_id; + +#ifdef FEAT_EVAL + // init w: variables + new_wp->w_vars = dict_alloc_id(aid_newwin_wvars); + if (new_wp->w_vars == NULL) + { + win_free_lsize(new_wp); + vim_free(new_wp); + return NULL; + } + init_var_dict(new_wp->w_vars, &new_wp->w_winvar, VAR_SCOPE); +#endif + + // Don't execute autocommands while the window is not properly + // initialized yet. gui_create_scrollbar() may trigger a FocusGained + // event. + block_autocmds(); + + /* + * link the window in the window list + */ + if (!hidden) + win_append(after, new_wp); + new_wp->w_wincol = 0; + new_wp->w_width = Columns; + + // position the display and the cursor at the top of the file. + new_wp->w_topline = 1; +#ifdef FEAT_DIFF + new_wp->w_topfill = 0; +#endif + new_wp->w_botline = 2; + new_wp->w_cursor.lnum = 1; + new_wp->w_scbind_pos = 1; + + // use global option value for global-local options + new_wp->w_p_so = -1; + new_wp->w_p_siso = -1; + + // We won't calculate w_fraction until resizing the window + new_wp->w_fraction = 0; + new_wp->w_prev_fraction_row = -1; + +#ifdef FEAT_GUI + if (gui.in_use) + { + gui_create_scrollbar(&new_wp->w_scrollbars[SBAR_LEFT], + SBAR_LEFT, new_wp); + gui_create_scrollbar(&new_wp->w_scrollbars[SBAR_RIGHT], + SBAR_RIGHT, new_wp); + } +#endif +#ifdef FEAT_FOLDING + foldInitWin(new_wp); +#endif + unblock_autocmds(); +#ifdef FEAT_SEARCH_EXTRA + new_wp->w_next_match_id = 1000; // up to 1000 can be picked by the user +#endif + return new_wp; +} + +/* + * Remove window 'wp' from the window list and free the structure. + */ + static void +win_free( + win_T *wp, + tabpage_T *tp) // tab page "win" is in, NULL for current +{ + int i; + buf_T *buf; + wininfo_T *wip; + +#ifdef FEAT_FOLDING + clearFolding(wp); +#endif + + // reduce the reference count to the argument list. + alist_unlink(wp->w_alist); + + // Don't execute autocommands while the window is halfway being deleted. + // gui_mch_destroy_scrollbar() may trigger a FocusGained event. + block_autocmds(); + +#ifdef FEAT_LUA + lua_window_free(wp); +#endif + +#ifdef FEAT_MZSCHEME + mzscheme_window_free(wp); +#endif + +#ifdef FEAT_PERL + perl_win_free(wp); +#endif + +#ifdef FEAT_PYTHON + python_window_free(wp); +#endif + +#ifdef FEAT_PYTHON3 + python3_window_free(wp); +#endif + +#ifdef FEAT_TCL + tcl_window_free(wp); +#endif + +#ifdef FEAT_RUBY + ruby_window_free(wp); +#endif + + clear_winopt(&wp->w_onebuf_opt); + clear_winopt(&wp->w_allbuf_opt); + + vim_free(wp->w_lcs_chars.multispace); + vim_free(wp->w_lcs_chars.leadmultispace); + +#ifdef FEAT_EVAL + vars_clear(&wp->w_vars->dv_hashtab); // free all w: variables + hash_init(&wp->w_vars->dv_hashtab); + unref_var_dict(wp->w_vars); +#endif + + { + tabpage_T *ttp; + + if (prevwin == wp) + prevwin = NULL; + FOR_ALL_TABPAGES(ttp) + if (ttp->tp_prevwin == wp) + ttp->tp_prevwin = NULL; + } + win_free_lsize(wp); + + for (i = 0; i < wp->w_tagstacklen; ++i) + { + vim_free(wp->w_tagstack[i].tagname); + vim_free(wp->w_tagstack[i].user_data); + } + vim_free(wp->w_localdir); + vim_free(wp->w_prevdir); + + // Remove the window from the b_wininfo lists, it may happen that the + // freed memory is re-used for another window. + FOR_ALL_BUFFERS(buf) + FOR_ALL_BUF_WININFO(buf, wip) + if (wip->wi_win == wp) + { + wininfo_T *wip2; + + // If there already is an entry with "wi_win" set to NULL it + // must be removed, it would never be used. + // Skip "wip" itself, otherwise Coverity complains. + for (wip2 = buf->b_wininfo; wip2 != NULL; wip2 = wip2->wi_next) + if (wip2 != wip && wip2->wi_win == NULL) + { + if (wip2->wi_next != NULL) + wip2->wi_next->wi_prev = wip2->wi_prev; + if (wip2->wi_prev == NULL) + buf->b_wininfo = wip2->wi_next; + else + wip2->wi_prev->wi_next = wip2->wi_next; + free_wininfo(wip2); + break; + } + + wip->wi_win = NULL; + } + +#ifdef FEAT_SEARCH_EXTRA + clear_matches(wp); +#endif + + free_jumplist(wp); + +#ifdef FEAT_QUICKFIX + qf_free_all(wp); +#endif + +#ifdef FEAT_GUI + if (gui.in_use) + { + gui_mch_destroy_scrollbar(&wp->w_scrollbars[SBAR_LEFT]); + gui_mch_destroy_scrollbar(&wp->w_scrollbars[SBAR_RIGHT]); + } +#endif // FEAT_GUI + +#ifdef FEAT_MENU + remove_winbar(wp); +#endif +#ifdef FEAT_PROP_POPUP + free_callback(&wp->w_close_cb); + free_callback(&wp->w_filter_cb); + for (i = 0; i < 4; ++i) + VIM_CLEAR(wp->w_border_highlight[i]); + vim_free(wp->w_scrollbar_highlight); + vim_free(wp->w_thumb_highlight); + vim_free(wp->w_popup_title); + list_unref(wp->w_popup_mask); + vim_free(wp->w_popup_mask_cells); +#endif + +#ifdef FEAT_SYN_HL + vim_free(wp->w_p_cc_cols); +#endif + + if (win_valid_any_tab(wp)) + win_remove(wp, tp); + if (autocmd_busy) + { + wp->w_next = au_pending_free_win; + au_pending_free_win = wp; + } + else + vim_free(wp); + + unblock_autocmds(); +} + +/* + * Return TRUE if "wp" is not in the list of windows: the autocmd window or a + * popup window. + */ + int +win_unlisted(win_T *wp) +{ + return is_aucmd_win(wp) || WIN_IS_POPUP(wp); +} + +#if defined(FEAT_PROP_POPUP) || defined(PROTO) +/* + * Free a popup window. This does not take the window out of the window list + * and assumes there is only one toplevel frame, no split. + */ + void +win_free_popup(win_T *win) +{ + if (win->w_buffer != NULL) + { + if (bt_popup(win->w_buffer)) + win_close_buffer(win, DOBUF_WIPE_REUSE, FALSE); + else + close_buffer(win, win->w_buffer, 0, FALSE, FALSE); + } +# if defined(FEAT_TIMERS) + // the timer may have been cleared, making the pointer invalid + if (timer_valid(win->w_popup_timer)) + stop_timer(win->w_popup_timer); +# endif + vim_free(win->w_frame); + win_free(win, NULL); +} +#endif + +/* + * Append window "wp" in the window list after window "after". + */ + static void +win_append(win_T *after, win_T *wp) +{ + win_T *before; + + if (after == NULL) // after NULL is in front of the first + before = firstwin; + else + before = after->w_next; + + wp->w_next = before; + wp->w_prev = after; + if (after == NULL) + firstwin = wp; + else + after->w_next = wp; + if (before == NULL) + lastwin = wp; + else + before->w_prev = wp; +} + +/* + * Remove a window from the window list. + */ + void +win_remove( + win_T *wp, + tabpage_T *tp) // tab page "win" is in, NULL for current +{ + if (wp->w_prev != NULL) + wp->w_prev->w_next = wp->w_next; + else if (tp == NULL) + firstwin = curtab->tp_firstwin = wp->w_next; + else + tp->tp_firstwin = wp->w_next; + + if (wp->w_next != NULL) + wp->w_next->w_prev = wp->w_prev; + else if (tp == NULL) + lastwin = curtab->tp_lastwin = wp->w_prev; + else + tp->tp_lastwin = wp->w_prev; +} + +/* + * Append frame "frp" in a frame list after frame "after". + */ + static void +frame_append(frame_T *after, frame_T *frp) +{ + frp->fr_next = after->fr_next; + after->fr_next = frp; + if (frp->fr_next != NULL) + frp->fr_next->fr_prev = frp; + frp->fr_prev = after; +} + +/* + * Insert frame "frp" in a frame list before frame "before". + */ + static void +frame_insert(frame_T *before, frame_T *frp) +{ + frp->fr_next = before; + frp->fr_prev = before->fr_prev; + before->fr_prev = frp; + if (frp->fr_prev != NULL) + frp->fr_prev->fr_next = frp; + else + frp->fr_parent->fr_child = frp; +} + +/* + * Remove a frame from a frame list. + */ + static void +frame_remove(frame_T *frp) +{ + if (frp->fr_prev != NULL) + frp->fr_prev->fr_next = frp->fr_next; + else + frp->fr_parent->fr_child = frp->fr_next; + if (frp->fr_next != NULL) + frp->fr_next->fr_prev = frp->fr_prev; +} + +/* + * Allocate w_lines[] for window "wp". + * Return FAIL for failure, OK for success. + */ + int +win_alloc_lines(win_T *wp) +{ + wp->w_lines_valid = 0; + wp->w_lines = ALLOC_CLEAR_MULT(wline_T, Rows); + if (wp->w_lines == NULL) + return FAIL; + return OK; +} + +/* + * free lsize arrays for a window + */ + void +win_free_lsize(win_T *wp) +{ + // TODO: why would wp be NULL here? + if (wp != NULL) + VIM_CLEAR(wp->w_lines); +} + +/* + * Called from win_new_shellsize() after Rows changed. + * This only does the current tab page, others must be done when made active. + */ + void +shell_new_rows(void) +{ + int h = (int)ROWS_AVAIL; + + if (firstwin == NULL) // not initialized yet + return; + if (h < frame_minheight(topframe, NULL)) + h = frame_minheight(topframe, NULL); + + // First try setting the heights of windows with 'winfixheight'. If + // that doesn't result in the right height, forget about that option. + frame_new_height(topframe, h, FALSE, TRUE); + if (!frame_check_height(topframe, h)) + frame_new_height(topframe, h, FALSE, FALSE); + + (void)win_comp_pos(); // recompute w_winrow and w_wincol + compute_cmdrow(); + curtab->tp_ch_used = p_ch; + + if (*p_spk != 'c' && !skip_win_fix_scroll) + win_fix_scroll(TRUE); + +#if 0 + // Disabled: don't want making the screen smaller make a window larger. + if (p_ea) + win_equal(curwin, FALSE, 'v'); +#endif +} + +/* + * Called from win_new_shellsize() after Columns changed. + */ + void +shell_new_columns(void) +{ + if (firstwin == NULL) // not initialized yet + return; + + // First try setting the widths of windows with 'winfixwidth'. If that + // doesn't result in the right width, forget about that option. + frame_new_width(topframe, (int)Columns, FALSE, TRUE); + if (!frame_check_width(topframe, Columns)) + frame_new_width(topframe, (int)Columns, FALSE, FALSE); + + (void)win_comp_pos(); // recompute w_winrow and w_wincol +#if 0 + // Disabled: don't want making the screen smaller make a window larger. + if (p_ea) + win_equal(curwin, FALSE, 'h'); +#endif +} + +/* + * Save the size of all windows in "gap". + */ + void +win_size_save(garray_T *gap) + +{ + win_T *wp; + + ga_init2(gap, sizeof(int), 1); + if (ga_grow(gap, win_count() * 2 + 1) == FAIL) + return; + + // first entry is value of 'lines' + ((int *)gap->ga_data)[gap->ga_len++] = Rows; + + FOR_ALL_WINDOWS(wp) + { + ((int *)gap->ga_data)[gap->ga_len++] = + wp->w_width + wp->w_vsep_width; + ((int *)gap->ga_data)[gap->ga_len++] = wp->w_height; + } +} + +/* + * Restore window sizes, but only if the number of windows is still the same + * and 'lines' didn't change. + * Does not free the growarray. + */ + void +win_size_restore(garray_T *gap) +{ + win_T *wp; + int i, j; + + if (win_count() * 2 + 1 == gap->ga_len + && ((int *)gap->ga_data)[0] == Rows) + { + // The order matters, because frames contain other frames, but it's + // difficult to get right. The easy way out is to do it twice. + for (j = 0; j < 2; ++j) + { + i = 1; + FOR_ALL_WINDOWS(wp) + { + frame_setwidth(wp->w_frame, ((int *)gap->ga_data)[i++]); + win_setheight_win(((int *)gap->ga_data)[i++], wp); + } + } + // recompute the window positions + (void)win_comp_pos(); + } +} + +/* + * Update the position for all windows, using the width and height of the + * frames. + * Returns the row just after the last window. + */ + int +win_comp_pos(void) +{ + int row = tabline_height(); + int col = 0; + + frame_comp_pos(topframe, &row, &col); + return row; +} + +/* + * Update the position of the windows in frame "topfrp", using the width and + * height of the frames. + * "*row" and "*col" are the top-left position of the frame. They are updated + * to the bottom-right position plus one. + */ + static void +frame_comp_pos(frame_T *topfrp, int *row, int *col) +{ + win_T *wp; + frame_T *frp; + int startcol; + int startrow; + int h; + + wp = topfrp->fr_win; + if (wp != NULL) + { + if (wp->w_winrow != *row || wp->w_wincol != *col) + { + // position changed, redraw + wp->w_winrow = *row; + wp->w_wincol = *col; + redraw_win_later(wp, UPD_NOT_VALID); + wp->w_redr_status = TRUE; + } + // WinBar will not show if the window height is zero + h = VISIBLE_HEIGHT(wp) + wp->w_status_height; + *row += h > topfrp->fr_height ? topfrp->fr_height : h; + *col += wp->w_width + wp->w_vsep_width; + } + else + { + startrow = *row; + startcol = *col; + FOR_ALL_FRAMES(frp, topfrp->fr_child) + { + if (topfrp->fr_layout == FR_ROW) + *row = startrow; // all frames are at the same row + else + *col = startcol; // all frames are at the same col + frame_comp_pos(frp, row, col); + } + } +} + +/* + * Make the current window show at least one line and one column. + */ + void +win_ensure_size(void) +{ + if (curwin->w_height == 0) + win_setheight(1); + if (curwin->w_width == 0) + win_setwidth(1); +} + +/* + * Set current window height and take care of repositioning other windows to + * fit around it. + */ + void +win_setheight(int height) +{ + win_setheight_win(height, curwin); +} + +/* + * Set the window height of window "win" and take care of repositioning other + * windows to fit around it. + */ + void +win_setheight_win(int height, win_T *win) +{ + int row; + + if (win == curwin) + { + // Always keep current window at least one line high, even when + // 'winminheight' is zero. + if (height < p_wmh) + height = p_wmh; + if (height == 0) + height = 1; + height += WINBAR_HEIGHT(curwin); + } + + frame_setheight(win->w_frame, height + win->w_status_height); + + // recompute the window positions + row = win_comp_pos(); + + /* + * If there is extra space created between the last window and the command + * line, clear it. + */ + if (full_screen && msg_scrolled == 0 && row < cmdline_row) + screen_fill(row, cmdline_row, 0, (int)Columns, ' ', ' ', 0); + cmdline_row = row; + msg_row = row; + msg_col = 0; + + if (*p_spk != 'c') + win_fix_scroll(TRUE); + + redraw_all_later(UPD_NOT_VALID); +} + +/* + * Set the height of a frame to "height" and take care that all frames and + * windows inside it are resized. Also resize frames on the left and right if + * the are in the same FR_ROW frame. + * + * Strategy: + * If the frame is part of a FR_COL frame, try fitting the frame in that + * frame. If that doesn't work (the FR_COL frame is too small), recursively + * go to containing frames to resize them and make room. + * If the frame is part of a FR_ROW frame, all frames must be resized as well. + * Check for the minimal height of the FR_ROW frame. + * At the top level we can also use change the command line height. + */ + static void +frame_setheight(frame_T *curfrp, int height) +{ + int room; // total number of lines available + int take; // number of lines taken from other windows + int room_cmdline; // lines available from cmdline + int run; + frame_T *frp; + int h; + int room_reserved; + + // If the height already is the desired value, nothing to do. + if (curfrp->fr_height == height) + return; + + if (curfrp->fr_parent == NULL) + { + // topframe: can only change the command line height + if (height > ROWS_AVAIL) + height = ROWS_AVAIL; + if (height > 0) + frame_new_height(curfrp, height, FALSE, FALSE); + } + else if (curfrp->fr_parent->fr_layout == FR_ROW) + { + // Row of frames: Also need to resize frames left and right of this + // one. First check for the minimal height of these. + h = frame_minheight(curfrp->fr_parent, NULL); + if (height < h) + height = h; + frame_setheight(curfrp->fr_parent, height); + } + else + { + /* + * Column of frames: try to change only frames in this column. + */ + /* + * Do this twice: + * 1: compute room available, if it's not enough try resizing the + * containing frame. + * 2: compute the room available and adjust the height to it. + * Try not to reduce the height of a window with 'winfixheight' set. + */ + for (run = 1; run <= 2; ++run) + { + room = 0; + room_reserved = 0; + FOR_ALL_FRAMES(frp, curfrp->fr_parent->fr_child) + { + if (frp != curfrp + && frp->fr_win != NULL + && frp->fr_win->w_p_wfh) + room_reserved += frp->fr_height; + room += frp->fr_height; + if (frp != curfrp) + room -= frame_minheight(frp, NULL); + } + if (curfrp->fr_width != Columns) + room_cmdline = 0; + else + { + room_cmdline = Rows - p_ch - (lastwin->w_winrow + + VISIBLE_HEIGHT(lastwin) + + lastwin->w_status_height); + if (room_cmdline < 0) + room_cmdline = 0; + } + + if (height <= room + room_cmdline) + break; + if (run == 2 || curfrp->fr_width == Columns) + { + height = room + room_cmdline; + break; + } + frame_setheight(curfrp->fr_parent, height + + frame_minheight(curfrp->fr_parent, NOWIN) - (int)p_wmh - 1); + } + + /* + * Compute the number of lines we will take from others frames (can be + * negative!). + */ + take = height - curfrp->fr_height; + + // If there is not enough room, also reduce the height of a window + // with 'winfixheight' set. + if (height > room + room_cmdline - room_reserved) + room_reserved = room + room_cmdline - height; + // If there is only a 'winfixheight' window and making the + // window smaller, need to make the other window taller. + if (take < 0 && room - curfrp->fr_height < room_reserved) + room_reserved = 0; + + if (take > 0 && room_cmdline > 0) + { + // use lines from cmdline first + if (take < room_cmdline) + room_cmdline = take; + take -= room_cmdline; + topframe->fr_height += room_cmdline; + } + + /* + * set the current frame to the new height + */ + frame_new_height(curfrp, height, FALSE, FALSE); + + /* + * First take lines from the frames after the current frame. If + * that is not enough, takes lines from frames above the current + * frame. + */ + for (run = 0; run < 2; ++run) + { + if (run == 0) + frp = curfrp->fr_next; // 1st run: start with next window + else + frp = curfrp->fr_prev; // 2nd run: start with prev window + while (frp != NULL && take != 0) + { + h = frame_minheight(frp, NULL); + if (room_reserved > 0 + && frp->fr_win != NULL + && frp->fr_win->w_p_wfh) + { + if (room_reserved >= frp->fr_height) + room_reserved -= frp->fr_height; + else + { + if (frp->fr_height - room_reserved > take) + room_reserved = frp->fr_height - take; + take -= frp->fr_height - room_reserved; + frame_new_height(frp, room_reserved, FALSE, FALSE); + room_reserved = 0; + } + } + else + { + if (frp->fr_height - take < h) + { + take -= frp->fr_height - h; + frame_new_height(frp, h, FALSE, FALSE); + } + else + { + frame_new_height(frp, frp->fr_height - take, + FALSE, FALSE); + take = 0; + } + } + if (run == 0) + frp = frp->fr_next; + else + frp = frp->fr_prev; + } + } + } +} + +/* + * Set current window width and take care of repositioning other windows to + * fit around it. + */ + void +win_setwidth(int width) +{ + win_setwidth_win(width, curwin); +} + + void +win_setwidth_win(int width, win_T *wp) +{ + // Always keep current window at least one column wide, even when + // 'winminwidth' is zero. + if (wp == curwin) + { + if (width < p_wmw) + width = p_wmw; + if (width == 0) + width = 1; + } + else if (width < 0) + width = 0; + + frame_setwidth(wp->w_frame, width + wp->w_vsep_width); + + // recompute the window positions + (void)win_comp_pos(); + + redraw_all_later(UPD_NOT_VALID); +} + +/* + * Set the width of a frame to "width" and take care that all frames and + * windows inside it are resized. Also resize frames above and below if the + * are in the same FR_ROW frame. + * + * Strategy is similar to frame_setheight(). + */ + static void +frame_setwidth(frame_T *curfrp, int width) +{ + int room; // total number of lines available + int take; // number of lines taken from other windows + int run; + frame_T *frp; + int w; + int room_reserved; + + // If the width already is the desired value, nothing to do. + if (curfrp->fr_width == width) + return; + + if (curfrp->fr_parent == NULL) + // topframe: can't change width + return; + + if (curfrp->fr_parent->fr_layout == FR_COL) + { + // Column of frames: Also need to resize frames above and below of + // this one. First check for the minimal width of these. + w = frame_minwidth(curfrp->fr_parent, NULL); + if (width < w) + width = w; + frame_setwidth(curfrp->fr_parent, width); + } + else + { + /* + * Row of frames: try to change only frames in this row. + * + * Do this twice: + * 1: compute room available, if it's not enough try resizing the + * containing frame. + * 2: compute the room available and adjust the width to it. + */ + for (run = 1; run <= 2; ++run) + { + room = 0; + room_reserved = 0; + FOR_ALL_FRAMES(frp, curfrp->fr_parent->fr_child) + { + if (frp != curfrp + && frp->fr_win != NULL + && frp->fr_win->w_p_wfw) + room_reserved += frp->fr_width; + room += frp->fr_width; + if (frp != curfrp) + room -= frame_minwidth(frp, NULL); + } + + if (width <= room) + break; + if (run == 2 || curfrp->fr_height >= ROWS_AVAIL) + { + width = room; + break; + } + frame_setwidth(curfrp->fr_parent, width + + frame_minwidth(curfrp->fr_parent, NOWIN) - (int)p_wmw - 1); + } + + /* + * Compute the number of lines we will take from others frames (can be + * negative!). + */ + take = width - curfrp->fr_width; + + // If there is not enough room, also reduce the width of a window + // with 'winfixwidth' set. + if (width > room - room_reserved) + room_reserved = room - width; + // If there is only a 'winfixwidth' window and making the + // window smaller, need to make the other window narrower. + if (take < 0 && room - curfrp->fr_width < room_reserved) + room_reserved = 0; + + /* + * set the current frame to the new width + */ + frame_new_width(curfrp, width, FALSE, FALSE); + + /* + * First take lines from the frames right of the current frame. If + * that is not enough, takes lines from frames left of the current + * frame. + */ + for (run = 0; run < 2; ++run) + { + if (run == 0) + frp = curfrp->fr_next; // 1st run: start with next window + else + frp = curfrp->fr_prev; // 2nd run: start with prev window + while (frp != NULL && take != 0) + { + w = frame_minwidth(frp, NULL); + if (room_reserved > 0 + && frp->fr_win != NULL + && frp->fr_win->w_p_wfw) + { + if (room_reserved >= frp->fr_width) + room_reserved -= frp->fr_width; + else + { + if (frp->fr_width - room_reserved > take) + room_reserved = frp->fr_width - take; + take -= frp->fr_width - room_reserved; + frame_new_width(frp, room_reserved, FALSE, FALSE); + room_reserved = 0; + } + } + else + { + if (frp->fr_width - take < w) + { + take -= frp->fr_width - w; + frame_new_width(frp, w, FALSE, FALSE); + } + else + { + frame_new_width(frp, frp->fr_width - take, + FALSE, FALSE); + take = 0; + } + } + if (run == 0) + frp = frp->fr_next; + else + frp = frp->fr_prev; + } + } + } +} + +/* + * Check 'winminheight' for a valid value and reduce it if needed. + */ + void +win_setminheight(void) +{ + int room; + int needed; + int first = TRUE; + + // loop until there is a 'winminheight' that is possible + while (p_wmh > 0) + { + room = Rows - p_ch; + needed = min_rows() - 1; // 1 was added for the cmdline + if (room >= needed) + break; + --p_wmh; + if (first) + { + emsg(_(e_not_enough_room)); + first = FALSE; + } + } +} + +/* + * Check 'winminwidth' for a valid value and reduce it if needed. + */ + void +win_setminwidth(void) +{ + int room; + int needed; + int first = TRUE; + + // loop until there is a 'winminheight' that is possible + while (p_wmw > 0) + { + room = Columns; + needed = frame_minwidth(topframe, NULL); + if (room >= needed) + break; + --p_wmw; + if (first) + { + emsg(_(e_not_enough_room)); + first = FALSE; + } + } +} + +/* + * Status line of dragwin is dragged "offset" lines down (negative is up). + */ + void +win_drag_status_line(win_T *dragwin, int offset) +{ + frame_T *curfr; + frame_T *fr; + int room; + int row; + int up; // if TRUE, drag status line up, otherwise down + int n; + + fr = dragwin->w_frame; + curfr = fr; + if (fr != topframe) // more than one window + { + fr = fr->fr_parent; + // When the parent frame is not a column of frames, its parent should + // be. + if (fr->fr_layout != FR_COL) + { + curfr = fr; + if (fr != topframe) // only a row of windows, may drag statusline + fr = fr->fr_parent; + } + } + + // If this is the last frame in a column, may want to resize the parent + // frame instead (go two up to skip a row of frames). + while (curfr != topframe && curfr->fr_next == NULL) + { + if (fr != topframe) + fr = fr->fr_parent; + curfr = fr; + if (fr != topframe) + fr = fr->fr_parent; + } + + if (offset < 0) // drag up + { + up = TRUE; + offset = -offset; + // sum up the room of the current frame and above it + if (fr == curfr) + { + // only one window + room = fr->fr_height - frame_minheight(fr, NULL); + } + else + { + room = 0; + for (fr = fr->fr_child; ; fr = fr->fr_next) + { + room += fr->fr_height - frame_minheight(fr, NULL); + if (fr == curfr) + break; + } + } + fr = curfr->fr_next; // put fr at frame that grows + } + else // drag down + { + up = FALSE; + /* + * Only dragging the last status line can reduce p_ch. + */ + room = Rows - cmdline_row; + if (curfr->fr_next == NULL) + --room; + else + room -= p_ch; + if (room < 0) + room = 0; + // sum up the room of frames below of the current one + FOR_ALL_FRAMES(fr, curfr->fr_next) + room += fr->fr_height - frame_minheight(fr, NULL); + fr = curfr; // put fr at window that grows + } + + if (room < offset) // Not enough room + offset = room; // Move as far as we can + if (offset <= 0) + return; + + /* + * Grow frame fr by "offset" lines. + * Doesn't happen when dragging the last status line up. + */ + if (fr != NULL) + frame_new_height(fr, fr->fr_height + offset, up, FALSE); + + if (up) + fr = curfr; // current frame gets smaller + else + fr = curfr->fr_next; // next frame gets smaller + + /* + * Now make the other frames smaller. + */ + while (fr != NULL && offset > 0) + { + n = frame_minheight(fr, NULL); + if (fr->fr_height - offset <= n) + { + offset -= fr->fr_height - n; + frame_new_height(fr, n, !up, FALSE); + } + else + { + frame_new_height(fr, fr->fr_height - offset, !up, FALSE); + break; + } + if (up) + fr = fr->fr_prev; + else + fr = fr->fr_next; + } + row = win_comp_pos(); + screen_fill(row, cmdline_row, 0, (int)Columns, ' ', ' ', 0); + cmdline_row = row; + p_ch = MAX(Rows - cmdline_row, 1); + curtab->tp_ch_used = p_ch; + + if (*p_spk != 'c') + win_fix_scroll(TRUE); + + redraw_all_later(UPD_SOME_VALID); + showmode(); +} + +/* + * Separator line of dragwin is dragged "offset" lines right (negative is left). + */ + void +win_drag_vsep_line(win_T *dragwin, int offset) +{ + frame_T *curfr; + frame_T *fr; + int room; + int left; // if TRUE, drag separator line left, otherwise right + int n; + + fr = dragwin->w_frame; + if (fr == topframe) // only one window (cannot happen?) + return; + curfr = fr; + fr = fr->fr_parent; + // When the parent frame is not a row of frames, its parent should be. + if (fr->fr_layout != FR_ROW) + { + if (fr == topframe) // only a column of windows (cannot happen?) + return; + curfr = fr; + fr = fr->fr_parent; + } + + // If this is the last frame in a row, may want to resize a parent + // frame instead. + while (curfr->fr_next == NULL) + { + if (fr == topframe) + break; + curfr = fr; + fr = fr->fr_parent; + if (fr != topframe) + { + curfr = fr; + fr = fr->fr_parent; + } + } + + if (offset < 0) // drag left + { + left = TRUE; + offset = -offset; + // sum up the room of the current frame and left of it + room = 0; + for (fr = fr->fr_child; ; fr = fr->fr_next) + { + room += fr->fr_width - frame_minwidth(fr, NULL); + if (fr == curfr) + break; + } + fr = curfr->fr_next; // put fr at frame that grows + } + else // drag right + { + left = FALSE; + // sum up the room of frames right of the current one + room = 0; + FOR_ALL_FRAMES(fr, curfr->fr_next) + room += fr->fr_width - frame_minwidth(fr, NULL); + fr = curfr; // put fr at window that grows + } + + if (room < offset) // Not enough room + offset = room; // Move as far as we can + if (offset <= 0) // No room at all, quit. + return; + if (fr == NULL) + // This can happen when calling win_move_separator() on the rightmost + // window. Just don't do anything. + return; + + // grow frame fr by offset lines + frame_new_width(fr, fr->fr_width + offset, left, FALSE); + + // shrink other frames: current and at the left or at the right + if (left) + fr = curfr; // current frame gets smaller + else + fr = curfr->fr_next; // next frame gets smaller + + while (fr != NULL && offset > 0) + { + n = frame_minwidth(fr, NULL); + if (fr->fr_width - offset <= n) + { + offset -= fr->fr_width - n; + frame_new_width(fr, n, !left, FALSE); + } + else + { + frame_new_width(fr, fr->fr_width - offset, !left, FALSE); + break; + } + if (left) + fr = fr->fr_prev; + else + fr = fr->fr_next; + } + (void)win_comp_pos(); + redraw_all_later(UPD_NOT_VALID); +} + +#define FRACTION_MULT 16384L + +/* + * Set wp->w_fraction for the current w_wrow and w_height. + * Has no effect when the window is less than two lines. + */ + void +set_fraction(win_T *wp) +{ + if (wp->w_height > 1) + // When cursor is in the first line the percentage is computed as if + // it's halfway that line. Thus with two lines it is 25%, with three + // lines 17%, etc. Similarly for the last line: 75%, 83%, etc. + wp->w_fraction = ((long)wp->w_wrow * FRACTION_MULT + + FRACTION_MULT / 2) / (long)wp->w_height; +} + +/* + * Handle scroll position for 'splitkeep'. Replaces scroll_to_fraction() + * call from win_new_height(). Instead we iterate over all windows in a + * tabpage and calculate the new scroll position. + * TODO: Ensure this also works with wrapped lines. + * Requires topline to be able to be set to a bufferline with some + * offset(row-wise scrolling/smoothscroll). + */ + static void +win_fix_scroll(int resize) +{ + int diff; + win_T *wp; + linenr_T lnum; + + skip_update_topline = TRUE; + FOR_ALL_WINDOWS(wp) + { + // Skip when window height has not changed. + if (wp->w_height != wp->w_prev_height) + { + // If window has moved update botline to keep the same screenlines. + if (*p_spk == 's' && wp->w_winrow != wp->w_prev_winrow + && wp->w_botline - 1 <= wp->w_buffer->b_ml.ml_line_count) + { + lnum = wp->w_cursor.lnum; + diff = (wp->w_winrow - wp->w_prev_winrow) + + (wp->w_height - wp->w_prev_height); + wp->w_cursor.lnum = wp->w_botline - 1; + // Add difference in height and row to botline. + if (diff > 0) + cursor_down_inner(wp, diff); + else + cursor_up_inner(wp, -diff); + // Bring the new cursor position to the bottom of the screen. + wp->w_fraction = FRACTION_MULT; + scroll_to_fraction(wp, wp->w_prev_height); + wp->w_cursor.lnum = lnum; + } + else if (wp == curwin) + wp->w_valid &= ~VALID_CROW; + invalidate_botline_win(wp); + validate_botline_win(wp); + } + wp->w_prev_height = wp->w_height; + wp->w_prev_winrow = wp->w_winrow; + } + skip_update_topline = FALSE; + // Ensure cursor is valid when not in normal mode or when resized. + if (!(get_real_state() & (MODE_NORMAL|MODE_CMDLINE|MODE_TERMINAL))) + win_fix_cursor(FALSE); + else if (resize) + win_fix_cursor(TRUE); +} + +/* + * Make sure the cursor position is valid for 'splitkeep'. + * If it is not, put the cursor position in the jumplist and move it. + * If we are not in normal mode ("normal" is zero), make it valid by scrolling + * instead. + */ + static void +win_fix_cursor(int normal) +{ + long so = get_scrolloff_value(); + win_T *wp = curwin; + linenr_T nlnum = 0; + linenr_T lnum = wp->w_cursor.lnum; + linenr_T bot; + linenr_T top; + + if (wp->w_buffer->b_ml.ml_line_count < wp->w_height) + return; + if (skip_win_fix_cursor) + return; + + // Determine valid cursor range. + so = MIN(wp->w_height / 2, so); + wp->w_cursor.lnum = wp->w_topline; + top = cursor_down_inner(wp, so); + wp->w_cursor.lnum = wp->w_botline - 1; + bot = cursor_up_inner(wp, so); + wp->w_cursor.lnum = lnum; + // Check if cursor position is above or below valid cursor range. + if (lnum > bot && (wp->w_botline - wp->w_buffer->b_ml.ml_line_count) != 1) + nlnum = bot; + else if (lnum < top && wp->w_topline != 1) + nlnum = (so == wp->w_height / 2) ? bot : top; + + if (nlnum) // Cursor is invalid for current scroll position. + { + if (normal) // Save to jumplist and set cursor to avoid scrolling. + { + setmark('\''); + wp->w_cursor.lnum = nlnum; + } + else // Scroll instead when not in normal mode. + { + wp->w_fraction = (nlnum == bot) ? FRACTION_MULT : 0; + scroll_to_fraction(wp, wp->w_prev_height); + validate_botline_win(curwin); + } + } +} + +/* + * Set the height of a window. + * "height" excludes any window toolbar. + * This takes care of the things inside the window, not what happens to the + * window position, the frame or to other windows. + */ + void +win_new_height(win_T *wp, int height) +{ + int prev_height = wp->w_height; + + // Don't want a negative height. Happens when splitting a tiny window. + // Will equalize heights soon to fix it. + if (height < 0) + height = 0; + if (wp->w_height == height) + return; // nothing to do + + if (wp->w_height > 0) + { + if (wp == curwin && *p_spk == 'c') + // w_wrow needs to be valid. When setting 'laststatus' this may + // call win_new_height() recursively. + validate_cursor(); + if (wp->w_height != prev_height) + return; // Recursive call already changed the size, bail out here + // to avoid the following to mess things up. + if (wp->w_wrow != wp->w_prev_fraction_row) + set_fraction(wp); + } + + wp->w_height = height; + wp->w_skipcol = 0; + wp->w_redr_status = TRUE; + win_comp_scroll(wp); + + // There is no point in adjusting the scroll position when exiting. Some + // values might be invalid. + if (!exiting && *p_spk == 'c') + scroll_to_fraction(wp, prev_height); +} + + void +scroll_to_fraction(win_T *wp, int prev_height) +{ + linenr_T lnum; + int sline, line_size; + int height = wp->w_height; + + // Don't change w_topline in any of these cases: + // - window height is 0 + // - 'scrollbind' is set and this isn't the current window + // - window height is sufficient to display the whole buffer and first line + // is visible. + if (height > 0 + && (!wp->w_p_scb || wp == curwin) + && (height < wp->w_buffer->b_ml.ml_line_count || wp->w_topline > 1)) + { + /* + * Find a value for w_topline that shows the cursor at the same + * relative position in the window as before (more or less). + */ + lnum = wp->w_cursor.lnum; + if (lnum < 1) // can happen when starting up + lnum = 1; + wp->w_wrow = ((long)wp->w_fraction * (long)height - 1L) + / FRACTION_MULT; + line_size = plines_win_col(wp, lnum, (long)(wp->w_cursor.col)) - 1; + sline = wp->w_wrow - line_size; + + if (sline >= 0) + { + // Make sure the whole cursor line is visible, if possible. + int rows = plines_win(wp, lnum, FALSE); + + if (sline > wp->w_height - rows) + { + sline = wp->w_height - rows; + wp->w_wrow -= rows - line_size; + } + } + + if (sline < 0) + { + /* + * Cursor line would go off top of screen if w_wrow was this high. + * Make cursor line the first line in the window. If not enough + * room use w_skipcol; + */ + wp->w_wrow = line_size; + if (wp->w_wrow >= wp->w_height + && (wp->w_width - win_col_off(wp)) > 0) + { + wp->w_skipcol += wp->w_width - win_col_off(wp); + --wp->w_wrow; + while (wp->w_wrow >= wp->w_height) + { + wp->w_skipcol += wp->w_width - win_col_off(wp) + + win_col_off2(wp); + --wp->w_wrow; + } + } + } + else if (sline > 0) + { + while (sline > 0 && lnum > 1) + { +#ifdef FEAT_FOLDING + hasFoldingWin(wp, lnum, &lnum, NULL, TRUE, NULL); + if (lnum == 1) + { + // first line in buffer is folded + line_size = 1; + --sline; + break; + } +#endif + --lnum; +#ifdef FEAT_DIFF + if (lnum == wp->w_topline) + line_size = plines_win_nofill(wp, lnum, TRUE) + + wp->w_topfill; + else +#endif + line_size = plines_win(wp, lnum, TRUE); + sline -= line_size; + } + + if (sline < 0) + { + /* + * Line we want at top would go off top of screen. Use next + * line instead. + */ +#ifdef FEAT_FOLDING + hasFoldingWin(wp, lnum, NULL, &lnum, TRUE, NULL); +#endif + lnum++; + wp->w_wrow -= line_size + sline; + } + else if (sline > 0) + { + // First line of file reached, use that as topline. + lnum = 1; + wp->w_wrow -= sline; + } + } + set_topline(wp, lnum); + } + + if (wp == curwin) + { + if (get_scrolloff_value()) + update_topline(); + curs_columns(FALSE); // validate w_wrow + } + if (prev_height > 0) + wp->w_prev_fraction_row = wp->w_wrow; + + redraw_win_later(wp, UPD_SOME_VALID); + invalidate_botline_win(wp); +} + +/* + * Set the width of a window. + */ + void +win_new_width(win_T *wp, int width) +{ + // Should we give an error if width < 0? + wp->w_width = width < 0 ? 0 : width; + wp->w_lines_valid = 0; + changed_line_abv_curs_win(wp); + invalidate_botline_win(wp); + if (wp == curwin) + { + skip_update_topline = (*p_spk != 'c'); + update_topline(); + curs_columns(TRUE); // validate w_wrow + skip_update_topline = FALSE; + } + redraw_win_later(wp, UPD_NOT_VALID); + wp->w_redr_status = TRUE; +} + + void +win_comp_scroll(win_T *wp) +{ +#if defined(FEAT_EVAL) + int old_w_p_scr = wp->w_p_scr; +#endif + + wp->w_p_scr = ((unsigned)wp->w_height >> 1); + if (wp->w_p_scr == 0) + wp->w_p_scr = 1; +#if defined(FEAT_EVAL) + if (wp->w_p_scr != old_w_p_scr) + { + // Used by "verbose set scroll". + wp->w_p_script_ctx[WV_SCROLL].sc_sid = SID_WINLAYOUT; + wp->w_p_script_ctx[WV_SCROLL].sc_lnum = 0; + } +#endif +} + +/* + * Command_height: called whenever p_ch has been changed. + */ + void +command_height(void) +{ + int h; + frame_T *frp; + int old_p_ch = curtab->tp_ch_used; + + // Use the value of p_ch that we remembered. This is needed for when the + // GUI starts up, we can't be sure in what order things happen. And when + // p_ch was changed in another tab page. + curtab->tp_ch_used = p_ch; + + // If the space for the command line is already more than 'cmdheight' there + // is nothing to do (window size must have decreased). + if (p_ch > old_p_ch && cmdline_row <= Rows - p_ch) + return; + + // Update cmdline_row to what it should be: just below the last window. + cmdline_row = topframe->fr_height + tabline_height(); + + // If cmdline_row is smaller than what it is supposed to be for 'cmdheight' + // then set old_p_ch to what it would be, so that the windows get resized + // properly for the new value. + if (cmdline_row < Rows - p_ch) + old_p_ch = Rows - cmdline_row; + + // Find bottom frame with width of screen. + frp = lastwin->w_frame; + while (frp->fr_width != Columns && frp->fr_parent != NULL) + frp = frp->fr_parent; + + // Avoid changing the height of a window with 'winfixheight' set. + while (frp->fr_prev != NULL && frp->fr_layout == FR_LEAF + && frp->fr_win->w_p_wfh) + frp = frp->fr_prev; + + if (starting != NO_SCREEN) + { + cmdline_row = Rows - p_ch; + + if (p_ch > old_p_ch) // p_ch got bigger + { + while (p_ch > old_p_ch) + { + if (frp == NULL) + { + emsg(_(e_not_enough_room)); + p_ch = old_p_ch; + curtab->tp_ch_used = p_ch; + cmdline_row = Rows - p_ch; + break; + } + h = frp->fr_height - frame_minheight(frp, NULL); + if (h > p_ch - old_p_ch) + h = p_ch - old_p_ch; + old_p_ch += h; + frame_add_height(frp, -h); + frp = frp->fr_prev; + } + + // Recompute window positions. + (void)win_comp_pos(); + + // clear the lines added to cmdline + if (full_screen) + screen_fill(cmdline_row, (int)Rows, 0, + (int)Columns, ' ', ' ', 0); + msg_row = cmdline_row; + redraw_cmdline = TRUE; + return; + } + + if (msg_row < cmdline_row) + msg_row = cmdline_row; + redraw_cmdline = TRUE; + } + frame_add_height(frp, (int)(old_p_ch - p_ch)); + + // Recompute window positions. + if (frp != lastwin->w_frame) + (void)win_comp_pos(); +} + +/* + * Resize frame "frp" to be "n" lines higher (negative for less high). + * Also resize the frames it is contained in. + */ + static void +frame_add_height(frame_T *frp, int n) +{ + frame_new_height(frp, frp->fr_height + n, FALSE, FALSE); + for (;;) + { + frp = frp->fr_parent; + if (frp == NULL) + break; + frp->fr_height += n; + } +} + +/* + * Add or remove a status line for the bottom window(s), according to the + * value of 'laststatus'. + */ + void +last_status( + int morewin) // pretend there are two or more windows +{ + // Don't make a difference between horizontal or vertical split. + last_status_rec(topframe, (p_ls == 2 + || (p_ls == 1 && (morewin || !ONE_WINDOW)))); +} + + static void +last_status_rec(frame_T *fr, int statusline) +{ + frame_T *fp; + win_T *wp; + + if (fr->fr_layout == FR_LEAF) + { + wp = fr->fr_win; + if (wp->w_status_height != 0 && !statusline) + { + // remove status line + win_new_height(wp, wp->w_height + 1); + wp->w_status_height = 0; + comp_col(); + } + else if (wp->w_status_height == 0 && statusline) + { + // Find a frame to take a line from. + fp = fr; + while (fp->fr_height <= frame_minheight(fp, NULL)) + { + if (fp == topframe) + { + emsg(_(e_not_enough_room)); + return; + } + // In a column of frames: go to frame above. If already at + // the top or in a row of frames: go to parent. + if (fp->fr_parent->fr_layout == FR_COL && fp->fr_prev != NULL) + fp = fp->fr_prev; + else + fp = fp->fr_parent; + } + wp->w_status_height = 1; + if (fp != fr) + { + frame_new_height(fp, fp->fr_height - 1, FALSE, FALSE); + frame_fix_height(wp); + (void)win_comp_pos(); + } + else + win_new_height(wp, wp->w_height - 1); + comp_col(); + redraw_all_later(UPD_SOME_VALID); + } + // Set prev_height when difference is due to 'laststatus'. + if (abs(wp->w_height - wp->w_prev_height) == 1) + wp->w_prev_height = wp->w_height; + } + else if (fr->fr_layout == FR_ROW) + { + // vertically split windows, set status line for each one + FOR_ALL_FRAMES(fp, fr->fr_child) + last_status_rec(fp, statusline); + } + else + { + // horizontally split window, set status line for last one + for (fp = fr->fr_child; fp->fr_next != NULL; fp = fp->fr_next) + ; + last_status_rec(fp, statusline); + } +} + +/* + * Return the number of lines used by the tab page line. + */ + int +tabline_height(void) +{ +#ifdef FEAT_GUI_TABLINE + // When the GUI has the tabline then this always returns zero. + if (gui_use_tabline()) + return 0; +#endif + switch (p_stal) + { + case 0: return 0; + case 1: return (first_tabpage->tp_next == NULL) ? 0 : 1; + } + return 1; +} + +/* + * Return the minimal number of rows that is needed on the screen to display + * the current number of windows. + */ + int +min_rows(void) +{ + int total; + tabpage_T *tp; + int n; + + if (firstwin == NULL) // not initialized yet + return MIN_LINES; + + total = 0; + FOR_ALL_TABPAGES(tp) + { + n = frame_minheight(tp->tp_topframe, NULL); + if (total < n) + total = n; + } + total += tabline_height(); + total += 1; // count the room for the command line + return total; +} + +/* + * Return TRUE if there is only one window and only one tab page, not + * counting a help or preview window, unless it is the current window. + * Does not count unlisted windows. + */ + int +only_one_window(void) +{ + int count = 0; + win_T *wp; + +#if defined(FEAT_PROP_POPUP) + // If the current window is a popup then there always is another window. + if (popup_is_popup(curwin)) + return FALSE; +#endif + + // If there is another tab page there always is another window. + if (first_tabpage->tp_next != NULL) + return FALSE; + + FOR_ALL_WINDOWS(wp) + if (wp->w_buffer != NULL + && (!((bt_help(wp->w_buffer) && !bt_help(curbuf)) +# ifdef FEAT_QUICKFIX + || wp->w_p_pvw +# endif + ) || wp == curwin) && !is_aucmd_win(wp)) + ++count; + return (count <= 1); +} + +/* + * Implementation of check_lnums() and check_lnums_nested(). + */ + static void +check_lnums_both(int do_curwin, int nested) +{ + win_T *wp; + tabpage_T *tp; + + FOR_ALL_TAB_WINDOWS(tp, wp) + if ((do_curwin || wp != curwin) && wp->w_buffer == curbuf) + { + int need_adjust; + + if (!nested) + { + // save the original cursor position and topline + wp->w_save_cursor.w_cursor_save = wp->w_cursor; + wp->w_save_cursor.w_topline_save = wp->w_topline; + } + + need_adjust = wp->w_cursor.lnum > curbuf->b_ml.ml_line_count; + if (need_adjust) + wp->w_cursor.lnum = curbuf->b_ml.ml_line_count; + if (need_adjust || !nested) + // save the (corrected) cursor position + wp->w_save_cursor.w_cursor_corr = wp->w_cursor; + + need_adjust = wp->w_topline > curbuf->b_ml.ml_line_count; + if (need_adjust) + wp->w_topline = curbuf->b_ml.ml_line_count; + if (need_adjust || !nested) + // save the (corrected) topline + wp->w_save_cursor.w_topline_corr = wp->w_topline; + } +} + +/* + * Correct the cursor line number in other windows. Used after changing the + * current buffer, and before applying autocommands. + * When "do_curwin" is TRUE, also check current window. + */ + void +check_lnums(int do_curwin) +{ + check_lnums_both(do_curwin, FALSE); +} + +/* + * Like check_lnums() but for when check_lnums() was already called. + */ + void +check_lnums_nested(int do_curwin) +{ + check_lnums_both(do_curwin, TRUE); +} + +/* + * Reset cursor and topline to its stored values from check_lnums(). + * check_lnums() must have been called first! + */ + void +reset_lnums(void) +{ + win_T *wp; + tabpage_T *tp; + + FOR_ALL_TAB_WINDOWS(tp, wp) + if (wp->w_buffer == curbuf) + { + // Restore the value if the autocommand didn't change it and it was + // set. + if (EQUAL_POS(wp->w_save_cursor.w_cursor_corr, wp->w_cursor) + && wp->w_save_cursor.w_cursor_save.lnum != 0) + wp->w_cursor = wp->w_save_cursor.w_cursor_save; + if (wp->w_save_cursor.w_topline_corr == wp->w_topline + && wp->w_save_cursor.w_topline_save != 0) + wp->w_topline = wp->w_save_cursor.w_topline_save; + } +} + +/* + * A snapshot of the window sizes, to restore them after closing the help + * window. + * Only these fields are used: + * fr_layout + * fr_width + * fr_height + * fr_next + * fr_child + * fr_win (only valid for the old curwin, NULL otherwise) + */ + +/* + * Create a snapshot of the current frame sizes. + */ + void +make_snapshot(int idx) +{ + clear_snapshot(curtab, idx); + make_snapshot_rec(topframe, &curtab->tp_snapshot[idx]); +} + + static void +make_snapshot_rec(frame_T *fr, frame_T **frp) +{ + *frp = ALLOC_CLEAR_ONE(frame_T); + if (*frp == NULL) + return; + (*frp)->fr_layout = fr->fr_layout; + (*frp)->fr_width = fr->fr_width; + (*frp)->fr_height = fr->fr_height; + if (fr->fr_next != NULL) + make_snapshot_rec(fr->fr_next, &((*frp)->fr_next)); + if (fr->fr_child != NULL) + make_snapshot_rec(fr->fr_child, &((*frp)->fr_child)); + if (fr->fr_layout == FR_LEAF && fr->fr_win == curwin) + (*frp)->fr_win = curwin; +} + +/* + * Remove any existing snapshot. + */ + static void +clear_snapshot(tabpage_T *tp, int idx) +{ + clear_snapshot_rec(tp->tp_snapshot[idx]); + tp->tp_snapshot[idx] = NULL; +} + + static void +clear_snapshot_rec(frame_T *fr) +{ + if (fr == NULL) + return; + clear_snapshot_rec(fr->fr_next); + clear_snapshot_rec(fr->fr_child); + vim_free(fr); +} + +/* + * Traverse a snapshot to find the previous curwin. + */ + static win_T * +get_snapshot_curwin_rec(frame_T *ft) +{ + win_T *wp; + + if (ft->fr_next != NULL) + { + if ((wp = get_snapshot_curwin_rec(ft->fr_next)) != NULL) + return wp; + } + if (ft->fr_child != NULL) + { + if ((wp = get_snapshot_curwin_rec(ft->fr_child)) != NULL) + return wp; + } + + return ft->fr_win; +} + +/* + * Return the current window stored in the snapshot or NULL. + */ + static win_T * +get_snapshot_curwin(int idx) +{ + if (curtab->tp_snapshot[idx] == NULL) + return NULL; + + return get_snapshot_curwin_rec(curtab->tp_snapshot[idx]); +} + +/* + * Restore a previously created snapshot, if there is any. + * This is only done if the screen size didn't change and the window layout is + * still the same. + */ + void +restore_snapshot( + int idx, + int close_curwin) // closing current window +{ + win_T *wp; + + if (curtab->tp_snapshot[idx] != NULL + && curtab->tp_snapshot[idx]->fr_width == topframe->fr_width + && curtab->tp_snapshot[idx]->fr_height == topframe->fr_height + && check_snapshot_rec(curtab->tp_snapshot[idx], topframe) == OK) + { + wp = restore_snapshot_rec(curtab->tp_snapshot[idx], topframe); + win_comp_pos(); + if (wp != NULL && close_curwin) + win_goto(wp); + redraw_all_later(UPD_NOT_VALID); + } + clear_snapshot(curtab, idx); +} + +/* + * Check if frames "sn" and "fr" have the same layout, same following frames + * and same children. And the window pointer is valid. + */ + static int +check_snapshot_rec(frame_T *sn, frame_T *fr) +{ + if (sn->fr_layout != fr->fr_layout + || (sn->fr_next == NULL) != (fr->fr_next == NULL) + || (sn->fr_child == NULL) != (fr->fr_child == NULL) + || (sn->fr_next != NULL + && check_snapshot_rec(sn->fr_next, fr->fr_next) == FAIL) + || (sn->fr_child != NULL + && check_snapshot_rec(sn->fr_child, fr->fr_child) == FAIL) + || (sn->fr_win != NULL && !win_valid(sn->fr_win))) + return FAIL; + return OK; +} + +/* + * Copy the size of snapshot frame "sn" to frame "fr". Do the same for all + * following frames and children. + * Returns a pointer to the old current window, or NULL. + */ + static win_T * +restore_snapshot_rec(frame_T *sn, frame_T *fr) +{ + win_T *wp = NULL; + win_T *wp2; + + fr->fr_height = sn->fr_height; + fr->fr_width = sn->fr_width; + if (fr->fr_layout == FR_LEAF) + { + frame_new_height(fr, fr->fr_height, FALSE, FALSE); + frame_new_width(fr, fr->fr_width, FALSE, FALSE); + wp = sn->fr_win; + } + if (sn->fr_next != NULL) + { + wp2 = restore_snapshot_rec(sn->fr_next, fr->fr_next); + if (wp2 != NULL) + wp = wp2; + } + if (sn->fr_child != NULL) + { + wp2 = restore_snapshot_rec(sn->fr_child, fr->fr_child); + if (wp2 != NULL) + wp = wp2; + } + return wp; +} + +#if defined(FEAT_GUI) || defined(PROTO) +/* + * Return TRUE if there is any vertically split window. + */ + int +win_hasvertsplit(void) +{ + frame_T *fr; + + if (topframe->fr_layout == FR_ROW) + return TRUE; + + if (topframe->fr_layout == FR_COL) + FOR_ALL_FRAMES(fr, topframe->fr_child) + if (fr->fr_layout == FR_ROW) + return TRUE; + + return FALSE; +} +#endif + +#if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) || defined(PROTO) + int +get_win_number(win_T *wp, win_T *first_win) +{ + int i = 1; + win_T *w; + + for (w = first_win; w != NULL && w != wp; w = W_NEXT(w)) + ++i; + + if (w == NULL) + return 0; + else + return i; +} + + int +get_tab_number(tabpage_T *tp UNUSED) +{ + int i = 1; + tabpage_T *t; + + for (t = first_tabpage; t != NULL && t != tp; t = t->tp_next) + ++i; + + if (t == NULL) + return 0; + else + return i; +} +#endif + +/* + * Return TRUE if "topfrp" and its children are at the right height. + */ + static int +frame_check_height(frame_T *topfrp, int height) +{ + frame_T *frp; + + if (topfrp->fr_height != height) + return FALSE; + + if (topfrp->fr_layout == FR_ROW) + FOR_ALL_FRAMES(frp, topfrp->fr_child) + if (frp->fr_height != height) + return FALSE; + + return TRUE; +} + +/* + * Return TRUE if "topfrp" and its children are at the right width. + */ + static int +frame_check_width(frame_T *topfrp, int width) +{ + frame_T *frp; + + if (topfrp->fr_width != width) + return FALSE; + + if (topfrp->fr_layout == FR_COL) + FOR_ALL_FRAMES(frp, topfrp->fr_child) + if (frp->fr_width != width) + return FALSE; + + return TRUE; +} + +#if defined(FEAT_SYN_HL) || defined(PROTO) +/* + * Simple int comparison function for use with qsort() + */ + static int +int_cmp(const void *a, const void *b) +{ + return *(const int *)a - *(const int *)b; +} + +/* + * Handle setting 'colorcolumn' or 'textwidth' in window "wp". + * Returns error message, NULL if it's OK. + */ + char * +check_colorcolumn(win_T *wp) +{ + char_u *s; + int col; + int count = 0; + int color_cols[256]; + int i; + int j = 0; + + if (wp->w_buffer == NULL) + return NULL; // buffer was closed + + for (s = wp->w_p_cc; *s != NUL && count < 255;) + { + if (*s == '-' || *s == '+') + { + // -N and +N: add to 'textwidth' + col = (*s == '-') ? -1 : 1; + ++s; + if (!VIM_ISDIGIT(*s)) + return e_invalid_argument; + col = col * getdigits(&s); + if (wp->w_buffer->b_p_tw == 0) + goto skip; // 'textwidth' not set, skip this item + col += wp->w_buffer->b_p_tw; + if (col < 0) + goto skip; + } + else if (VIM_ISDIGIT(*s)) + col = getdigits(&s); + else + return e_invalid_argument; + color_cols[count++] = col - 1; // 1-based to 0-based +skip: + if (*s == NUL) + break; + if (*s != ',') + return e_invalid_argument; + if (*++s == NUL) + return e_invalid_argument; // illegal trailing comma as in "set cc=80," + } + + vim_free(wp->w_p_cc_cols); + if (count == 0) + wp->w_p_cc_cols = NULL; + else + { + wp->w_p_cc_cols = ALLOC_MULT(int, count + 1); + if (wp->w_p_cc_cols != NULL) + { + // sort the columns for faster usage on screen redraw inside + // win_line() + qsort(color_cols, count, sizeof(int), int_cmp); + + for (i = 0; i < count; ++i) + // skip duplicates + if (j == 0 || wp->w_p_cc_cols[j - 1] != color_cols[i]) + wp->w_p_cc_cols[j++] = color_cols[i]; + wp->w_p_cc_cols[j] = -1; // end marker + } + } + + return NULL; // no error +} +#endif |