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Diffstat (limited to 'src/change.c')
| -rw-r--r-- | src/change.c | 2335 |
1 files changed, 2335 insertions, 0 deletions
diff --git a/src/change.c b/src/change.c new file mode 100644 index 0000000..50dc105 --- /dev/null +++ b/src/change.c @@ -0,0 +1,2335 @@ +/* vi:set ts=8 sts=4 sw=4 noet: + * + * VIM - Vi IMproved by Bram Moolenaar + * + * Do ":help uganda" in Vim to read copying and usage conditions. + * Do ":help credits" in Vim to see a list of people who contributed. + * See README.txt for an overview of the Vim source code. + */ + +/* + * change.c: functions related to changing text + */ + +#include "vim.h" + +/* + * If the file is readonly, give a warning message with the first change. + * Don't do this for autocommands. + * Doesn't use emsg(), because it flushes the macro buffer. + * If we have undone all changes b_changed will be FALSE, but "b_did_warn" + * will be TRUE. + * "col" is the column for the message; non-zero when in insert mode and + * 'showmode' is on. + * Careful: may trigger autocommands that reload the buffer. + */ + void +change_warning(int col) +{ + static char *w_readonly = N_("W10: Warning: Changing a readonly file"); + + if (curbuf->b_did_warn == FALSE + && curbufIsChanged() == 0 + && !autocmd_busy + && curbuf->b_p_ro) + { + ++curbuf_lock; + apply_autocmds(EVENT_FILECHANGEDRO, NULL, NULL, FALSE, curbuf); + --curbuf_lock; + if (!curbuf->b_p_ro) + return; + + // Do what msg() does, but with a column offset if the warning should + // be after the mode message. + msg_start(); + if (msg_row == Rows - 1) + msg_col = col; + msg_source(HL_ATTR(HLF_W)); + msg_puts_attr(_(w_readonly), HL_ATTR(HLF_W) | MSG_HIST); +#ifdef FEAT_EVAL + set_vim_var_string(VV_WARNINGMSG, (char_u *)_(w_readonly), -1); +#endif + msg_clr_eos(); + (void)msg_end(); + if (msg_silent == 0 && !silent_mode +#ifdef FEAT_EVAL + && time_for_testing != 1 +#endif + ) + { + out_flush(); + ui_delay(1002L, TRUE); // give the user time to think about it + } + curbuf->b_did_warn = TRUE; + redraw_cmdline = FALSE; // don't redraw and erase the message + if (msg_row < Rows - 1) + showmode(); + } +} + +/* + * Call this function when something in the current buffer is changed. + * + * Most often called through changed_bytes() and changed_lines(), which also + * mark the area of the display to be redrawn. + * + * Careful: may trigger autocommands that reload the buffer. + */ + void +changed(void) +{ +#if defined(FEAT_XIM) && defined(FEAT_GUI_GTK) + if (p_imst == IM_ON_THE_SPOT) + { + // The text of the preediting area is inserted, but this doesn't + // mean a change of the buffer yet. That is delayed until the + // text is committed. (this means preedit becomes empty) + if (im_is_preediting() && !xim_changed_while_preediting) + return; + xim_changed_while_preediting = FALSE; + } +#endif + + if (!curbuf->b_changed) + { + int save_msg_scroll = msg_scroll; + + // Give a warning about changing a read-only file. This may also + // check-out the file, thus change "curbuf"! + change_warning(0); + + // Create a swap file if that is wanted. + // Don't do this for "nofile" and "nowrite" buffer types. + if (curbuf->b_may_swap +#ifdef FEAT_QUICKFIX + && !bt_dontwrite(curbuf) +#endif + ) + { + int save_need_wait_return = need_wait_return; + + need_wait_return = FALSE; + ml_open_file(curbuf); + + // The ml_open_file() can cause an ATTENTION message. + // Wait two seconds, to make sure the user reads this unexpected + // message. Since we could be anywhere, call wait_return() now, + // and don't let the emsg() set msg_scroll. + if (need_wait_return && emsg_silent == 0 && !in_assert_fails) + { + out_flush(); + ui_delay(2002L, TRUE); + wait_return(TRUE); + msg_scroll = save_msg_scroll; + } + else + need_wait_return = save_need_wait_return; + } + changed_internal(); + } + ++CHANGEDTICK(curbuf); + +#ifdef FEAT_SEARCH_EXTRA + // If a pattern is highlighted, the position may now be invalid. + highlight_match = FALSE; +#endif +} + +/* + * Internal part of changed(), no user interaction. + * Also used for recovery. + */ + void +changed_internal(void) +{ + curbuf->b_changed = TRUE; + ml_setflags(curbuf); + check_status(curbuf); + redraw_tabline = TRUE; +#ifdef FEAT_TITLE + need_maketitle = TRUE; // set window title later +#endif +} + +#ifdef FEAT_EVAL +static long next_listener_id = 0; + +/* + * Check if the change at "lnum" is above or overlaps with an existing + * change. If above then flush changes and invoke listeners. + * Returns TRUE if the change was merged. + */ + static int +check_recorded_changes( + buf_T *buf, + linenr_T lnum, + linenr_T lnume, + long xtra) +{ + if (buf->b_recorded_changes != NULL && xtra != 0) + { + listitem_T *li; + linenr_T prev_lnum; + linenr_T prev_lnume; + + FOR_ALL_LIST_ITEMS(buf->b_recorded_changes, li) + { + prev_lnum = (linenr_T)dict_get_number( + li->li_tv.vval.v_dict, (char_u *)"lnum"); + prev_lnume = (linenr_T)dict_get_number( + li->li_tv.vval.v_dict, (char_u *)"end"); + if (prev_lnum >= lnum || prev_lnum > lnume || prev_lnume >= lnum) + { + // the current change is going to make the line number in + // the older change invalid, flush now + invoke_listeners(curbuf); + break; + } + } + } + return FALSE; +} + +/* + * Record a change for listeners added with listener_add(). + * Always for the current buffer. + */ + static void +may_record_change( + linenr_T lnum, + colnr_T col, + linenr_T lnume, + long xtra) +{ + dict_T *dict; + + if (curbuf->b_listener == NULL) + return; + + // If the new change is going to change the line numbers in already listed + // changes, then flush. + if (check_recorded_changes(curbuf, lnum, lnume, xtra)) + return; + + if (curbuf->b_recorded_changes == NULL) + { + curbuf->b_recorded_changes = list_alloc(); + if (curbuf->b_recorded_changes == NULL) // out of memory + return; + ++curbuf->b_recorded_changes->lv_refcount; + curbuf->b_recorded_changes->lv_lock = VAR_FIXED; + } + + dict = dict_alloc(); + if (dict == NULL) + return; + dict_add_number(dict, "lnum", (varnumber_T)lnum); + dict_add_number(dict, "end", (varnumber_T)lnume); + dict_add_number(dict, "added", (varnumber_T)xtra); + dict_add_number(dict, "col", (varnumber_T)col + 1); + + list_append_dict(curbuf->b_recorded_changes, dict); +} + +/* + * listener_add() function + */ + void +f_listener_add(typval_T *argvars, typval_T *rettv) +{ + callback_T callback; + listener_T *lnr; + buf_T *buf = curbuf; + + callback = get_callback(&argvars[0]); + if (callback.cb_name == NULL) + return; + + if (argvars[1].v_type != VAR_UNKNOWN) + { + buf = get_buf_arg(&argvars[1]); + if (buf == NULL) + { + free_callback(&callback); + return; + } + } + + lnr = ALLOC_CLEAR_ONE(listener_T); + if (lnr == NULL) + { + free_callback(&callback); + return; + } + lnr->lr_next = buf->b_listener; + buf->b_listener = lnr; + + set_callback(&lnr->lr_callback, &callback); + + lnr->lr_id = ++next_listener_id; + rettv->vval.v_number = lnr->lr_id; +} + +/* + * listener_flush() function + */ + void +f_listener_flush(typval_T *argvars, typval_T *rettv UNUSED) +{ + buf_T *buf = curbuf; + + if (argvars[0].v_type != VAR_UNKNOWN) + { + buf = get_buf_arg(&argvars[0]); + if (buf == NULL) + return; + } + invoke_listeners(buf); +} + +/* + * listener_remove() function + */ + void +f_listener_remove(typval_T *argvars, typval_T *rettv) +{ + listener_T *lnr; + listener_T *next; + listener_T *prev; + int id = tv_get_number(argvars); + buf_T *buf; + + FOR_ALL_BUFFERS(buf) + { + prev = NULL; + for (lnr = buf->b_listener; lnr != NULL; lnr = next) + { + next = lnr->lr_next; + if (lnr->lr_id == id) + { + if (prev != NULL) + prev->lr_next = lnr->lr_next; + else + buf->b_listener = lnr->lr_next; + free_callback(&lnr->lr_callback); + vim_free(lnr); + rettv->vval.v_number = 1; + return; + } + prev = lnr; + } + } +} + +/* + * Called before inserting a line above "lnum"/"lnum3" or deleting line "lnum" + * to "lnume". + */ + void +may_invoke_listeners(buf_T *buf, linenr_T lnum, linenr_T lnume, int added) +{ + check_recorded_changes(buf, lnum, lnume, added); +} + +/* + * Called when a sequence of changes is done: invoke listeners added with + * listener_add(). + */ + void +invoke_listeners(buf_T *buf) +{ + listener_T *lnr; + typval_T rettv; + typval_T argv[6]; + listitem_T *li; + linenr_T start = MAXLNUM; + linenr_T end = 0; + linenr_T added = 0; + int save_updating_screen = updating_screen; + static int recursive = FALSE; + + if (buf->b_recorded_changes == NULL // nothing changed + || buf->b_listener == NULL // no listeners + || recursive) // already busy + return; + recursive = TRUE; + + // Block messages on channels from being handled, so that they don't make + // text changes here. + ++updating_screen; + + argv[0].v_type = VAR_NUMBER; + argv[0].vval.v_number = buf->b_fnum; // a:bufnr + + FOR_ALL_LIST_ITEMS(buf->b_recorded_changes, li) + { + varnumber_T lnum; + + lnum = dict_get_number(li->li_tv.vval.v_dict, (char_u *)"lnum"); + if (start > lnum) + start = lnum; + lnum = dict_get_number(li->li_tv.vval.v_dict, (char_u *)"end"); + if (end < lnum) + end = lnum; + added += dict_get_number(li->li_tv.vval.v_dict, (char_u *)"added"); + } + argv[1].v_type = VAR_NUMBER; + argv[1].vval.v_number = start; + argv[2].v_type = VAR_NUMBER; + argv[2].vval.v_number = end; + argv[3].v_type = VAR_NUMBER; + argv[3].vval.v_number = added; + + argv[4].v_type = VAR_LIST; + argv[4].vval.v_list = buf->b_recorded_changes; + ++textwinlock; + + for (lnr = buf->b_listener; lnr != NULL; lnr = lnr->lr_next) + { + call_callback(&lnr->lr_callback, -1, &rettv, 5, argv); + clear_tv(&rettv); + } + + --textwinlock; + list_unref(buf->b_recorded_changes); + buf->b_recorded_changes = NULL; + + if (save_updating_screen) + updating_screen = TRUE; + else + after_updating_screen(TRUE); + recursive = FALSE; +} + +/* + * Remove all listeners associated with "buf". + */ + void +remove_listeners(buf_T *buf) +{ + listener_T *lnr; + listener_T *next; + + for (lnr = buf->b_listener; lnr != NULL; lnr = next) + { + next = lnr->lr_next; + free_callback(&lnr->lr_callback); + vim_free(lnr); + } + buf->b_listener = NULL; +} +#endif + +/* + * Common code for when a change was made. + * See changed_lines() for the arguments. + * Careful: may trigger autocommands that reload the buffer. + */ + static void +changed_common( + linenr_T lnum, + colnr_T col, + linenr_T lnume, + long xtra) +{ + win_T *wp; + tabpage_T *tp; + int i; +#ifdef FEAT_JUMPLIST + int cols; + pos_T *p; + int add; +#endif + + // mark the buffer as modified + changed(); + +#ifdef FEAT_EVAL + may_record_change(lnum, col, lnume, xtra); +#endif +#ifdef FEAT_DIFF + if (curwin->w_p_diff && diff_internal()) + curtab->tp_diff_update = TRUE; +#endif + + // set the '. mark + if ((cmdmod.cmod_flags & CMOD_KEEPJUMPS) == 0) + { + curbuf->b_last_change.lnum = lnum; + curbuf->b_last_change.col = col; + +#ifdef FEAT_JUMPLIST + // Create a new entry if a new undo-able change was started or we + // don't have an entry yet. + if (curbuf->b_new_change || curbuf->b_changelistlen == 0) + { + if (curbuf->b_changelistlen == 0) + add = TRUE; + else + { + // Don't create a new entry when the line number is the same + // as the last one and the column is not too far away. Avoids + // creating many entries for typing "xxxxx". + p = &curbuf->b_changelist[curbuf->b_changelistlen - 1]; + if (p->lnum != lnum) + add = TRUE; + else + { + cols = comp_textwidth(FALSE); + if (cols == 0) + cols = 79; + add = (p->col + cols < col || col + cols < p->col); + } + } + if (add) + { + // This is the first of a new sequence of undo-able changes + // and it's at some distance of the last change. Use a new + // position in the changelist. + curbuf->b_new_change = FALSE; + + if (curbuf->b_changelistlen == JUMPLISTSIZE) + { + // changelist is full: remove oldest entry + curbuf->b_changelistlen = JUMPLISTSIZE - 1; + mch_memmove(curbuf->b_changelist, curbuf->b_changelist + 1, + sizeof(pos_T) * (JUMPLISTSIZE - 1)); + FOR_ALL_TAB_WINDOWS(tp, wp) + { + // Correct position in changelist for other windows on + // this buffer. + if (wp->w_buffer == curbuf && wp->w_changelistidx > 0) + --wp->w_changelistidx; + } + } + FOR_ALL_TAB_WINDOWS(tp, wp) + { + // For other windows, if the position in the changelist is + // at the end it stays at the end. + if (wp->w_buffer == curbuf + && wp->w_changelistidx == curbuf->b_changelistlen) + ++wp->w_changelistidx; + } + ++curbuf->b_changelistlen; + } + } + curbuf->b_changelist[curbuf->b_changelistlen - 1] = + curbuf->b_last_change; + // The current window is always after the last change, so that "g," + // takes you back to it. + curwin->w_changelistidx = curbuf->b_changelistlen; +#endif + } + + FOR_ALL_TAB_WINDOWS(tp, wp) + { + if (wp->w_buffer == curbuf) + { + // Mark this window to be redrawn later. + if (wp->w_redr_type < VALID) + wp->w_redr_type = VALID; + + // Check if a change in the buffer has invalidated the cached + // values for the cursor. +#ifdef FEAT_FOLDING + // Update the folds for this window. Can't postpone this, because + // a following operator might work on the whole fold: ">>dd". + foldUpdate(wp, lnum, lnume + xtra - 1); + + // The change may cause lines above or below the change to become + // included in a fold. Set lnum/lnume to the first/last line that + // might be displayed differently. + // Set w_cline_folded here as an efficient way to update it when + // inserting lines just above a closed fold. + i = hasFoldingWin(wp, lnum, &lnum, NULL, FALSE, NULL); + if (wp->w_cursor.lnum == lnum) + wp->w_cline_folded = i; + i = hasFoldingWin(wp, lnume, NULL, &lnume, FALSE, NULL); + if (wp->w_cursor.lnum == lnume) + wp->w_cline_folded = i; + + // If the changed line is in a range of previously folded lines, + // compare with the first line in that range. + if (wp->w_cursor.lnum <= lnum) + { + i = find_wl_entry(wp, lnum); + if (i >= 0 && wp->w_cursor.lnum > wp->w_lines[i].wl_lnum) + changed_line_abv_curs_win(wp); + } +#endif + if (wp->w_cursor.lnum > lnum) + changed_line_abv_curs_win(wp); + else if (wp->w_cursor.lnum == lnum && wp->w_cursor.col >= col) + changed_cline_bef_curs_win(wp); + if (wp->w_botline >= lnum) + { + // Assume that botline doesn't change (inserted lines make + // other lines scroll down below botline). + approximate_botline_win(wp); + } + + // Check if any w_lines[] entries have become invalid. + // For entries below the change: Correct the lnums for + // inserted/deleted lines. Makes it possible to stop displaying + // after the change. + for (i = 0; i < wp->w_lines_valid; ++i) + if (wp->w_lines[i].wl_valid) + { + if (wp->w_lines[i].wl_lnum >= lnum) + { + if (wp->w_lines[i].wl_lnum < lnume) + { + // line included in change + wp->w_lines[i].wl_valid = FALSE; + } + else if (xtra != 0) + { + // line below change + wp->w_lines[i].wl_lnum += xtra; +#ifdef FEAT_FOLDING + wp->w_lines[i].wl_lastlnum += xtra; +#endif + } + } +#ifdef FEAT_FOLDING + else if (wp->w_lines[i].wl_lastlnum >= lnum) + { + // change somewhere inside this range of folded lines, + // may need to be redrawn + wp->w_lines[i].wl_valid = FALSE; + } +#endif + } + +#ifdef FEAT_FOLDING + // Take care of side effects for setting w_topline when folds have + // changed. Esp. when the buffer was changed in another window. + if (hasAnyFolding(wp)) + set_topline(wp, wp->w_topline); +#endif + // Relative numbering may require updating more. + if (wp->w_p_rnu) + redraw_win_later(wp, SOME_VALID); +#ifdef FEAT_SYN_HL + // Cursor line highlighting probably need to be updated with + // "VALID" if it's below the change. + // If the cursor line is inside the change we need to redraw more. + if (wp->w_p_cul) + { + if (xtra == 0) + redraw_win_later(wp, VALID); + else if (lnum <= wp->w_last_cursorline) + redraw_win_later(wp, SOME_VALID); + } +#endif + } + } + + // Call update_screen() later, which checks out what needs to be redrawn, + // since it notices b_mod_set and then uses b_mod_*. + if (must_redraw < VALID) + must_redraw = VALID; + + // when the cursor line is changed always trigger CursorMoved + if (lnum <= curwin->w_cursor.lnum + && lnume + (xtra < 0 ? -xtra : xtra) > curwin->w_cursor.lnum) + last_cursormoved.lnum = 0; +} + + static void +changedOneline(buf_T *buf, linenr_T lnum) +{ + if (buf->b_mod_set) + { + // find the maximum area that must be redisplayed + if (lnum < buf->b_mod_top) + buf->b_mod_top = lnum; + else if (lnum >= buf->b_mod_bot) + buf->b_mod_bot = lnum + 1; + } + else + { + // set the area that must be redisplayed to one line + buf->b_mod_set = TRUE; + buf->b_mod_top = lnum; + buf->b_mod_bot = lnum + 1; + buf->b_mod_xlines = 0; + } +} + +/* + * Changed bytes within a single line for the current buffer. + * - marks the windows on this buffer to be redisplayed + * - marks the buffer changed by calling changed() + * - invalidates cached values + * Careful: may trigger autocommands that reload the buffer. + */ + void +changed_bytes(linenr_T lnum, colnr_T col) +{ + changedOneline(curbuf, lnum); + changed_common(lnum, col, lnum + 1, 0L); + +#ifdef FEAT_DIFF + // Diff highlighting in other diff windows may need to be updated too. + if (curwin->w_p_diff) + { + win_T *wp; + linenr_T wlnum; + + FOR_ALL_WINDOWS(wp) + if (wp->w_p_diff && wp != curwin) + { + redraw_win_later(wp, VALID); + wlnum = diff_lnum_win(lnum, wp); + if (wlnum > 0) + changedOneline(wp->w_buffer, wlnum); + } + } +#endif +} + +/* + * Like changed_bytes() but also adjust text properties for "added" bytes. + * When "added" is negative text was deleted. + */ + void +inserted_bytes(linenr_T lnum, colnr_T col, int added UNUSED) +{ +#ifdef FEAT_PROP_POPUP + if (curbuf->b_has_textprop && added != 0) + adjust_prop_columns(lnum, col, added, 0); +#endif + + changed_bytes(lnum, col); +} + +/* + * Appended "count" lines below line "lnum" in the current buffer. + * Must be called AFTER the change and after mark_adjust(). + * Takes care of marking the buffer to be redrawn and sets the changed flag. + */ + void +appended_lines(linenr_T lnum, long count) +{ + changed_lines(lnum + 1, 0, lnum + 1, count); +} + +/* + * Like appended_lines(), but adjust marks first. + */ + void +appended_lines_mark(linenr_T lnum, long count) +{ + // Skip mark_adjust when adding a line after the last one, there can't + // be marks there. But it's still needed in diff mode. + if (lnum + count < curbuf->b_ml.ml_line_count +#ifdef FEAT_DIFF + || curwin->w_p_diff +#endif + ) + mark_adjust(lnum + 1, (linenr_T)MAXLNUM, count, 0L); + changed_lines(lnum + 1, 0, lnum + 1, count); +} + +/* + * Deleted "count" lines at line "lnum" in the current buffer. + * Must be called AFTER the change and after mark_adjust(). + * Takes care of marking the buffer to be redrawn and sets the changed flag. + */ + void +deleted_lines(linenr_T lnum, long count) +{ + changed_lines(lnum, 0, lnum + count, -count); +} + +/* + * Like deleted_lines(), but adjust marks first. + * Make sure the cursor is on a valid line before calling, a GUI callback may + * be triggered to display the cursor. + */ + void +deleted_lines_mark(linenr_T lnum, long count) +{ + mark_adjust(lnum, (linenr_T)(lnum + count - 1), (long)MAXLNUM, -count); + changed_lines(lnum, 0, lnum + count, -count); +} + +/* + * Marks the area to be redrawn after a change. + */ + static void +changed_lines_buf( + buf_T *buf, + linenr_T lnum, // first line with change + linenr_T lnume, // line below last changed line + long xtra) // number of extra lines (negative when deleting) +{ + if (buf->b_mod_set) + { + // find the maximum area that must be redisplayed + if (lnum < buf->b_mod_top) + buf->b_mod_top = lnum; + if (lnum < buf->b_mod_bot) + { + // adjust old bot position for xtra lines + buf->b_mod_bot += xtra; + if (buf->b_mod_bot < lnum) + buf->b_mod_bot = lnum; + } + if (lnume + xtra > buf->b_mod_bot) + buf->b_mod_bot = lnume + xtra; + buf->b_mod_xlines += xtra; + } + else + { + // set the area that must be redisplayed + buf->b_mod_set = TRUE; + buf->b_mod_top = lnum; + buf->b_mod_bot = lnume + xtra; + buf->b_mod_xlines = xtra; + } +} + +/* + * Changed lines for the current buffer. + * Must be called AFTER the change and after mark_adjust(). + * - mark the buffer changed by calling changed() + * - mark the windows on this buffer to be redisplayed + * - invalidate cached values + * "lnum" is the first line that needs displaying, "lnume" the first line + * below the changed lines (BEFORE the change). + * When only inserting lines, "lnum" and "lnume" are equal. + * Takes care of calling changed() and updating b_mod_*. + * Careful: may trigger autocommands that reload the buffer. + */ + void +changed_lines( + linenr_T lnum, // first line with change + colnr_T col, // column in first line with change + linenr_T lnume, // line below last changed line + long xtra) // number of extra lines (negative when deleting) +{ + changed_lines_buf(curbuf, lnum, lnume, xtra); + +#ifdef FEAT_DIFF + if (xtra == 0 && curwin->w_p_diff && !diff_internal()) + { + // When the number of lines doesn't change then mark_adjust() isn't + // called and other diff buffers still need to be marked for + // displaying. + win_T *wp; + linenr_T wlnum; + + FOR_ALL_WINDOWS(wp) + if (wp->w_p_diff && wp != curwin) + { + redraw_win_later(wp, VALID); + wlnum = diff_lnum_win(lnum, wp); + if (wlnum > 0) + changed_lines_buf(wp->w_buffer, wlnum, + lnume - lnum + wlnum, 0L); + } + } +#endif + + changed_common(lnum, col, lnume, xtra); +} + +/* + * Called when the changed flag must be reset for buffer "buf". + * When "ff" is TRUE also reset 'fileformat'. + * When "always_inc_changedtick" is TRUE b:changedtick is incremented also when + * the changed flag was off. + */ + void +unchanged(buf_T *buf, int ff, int always_inc_changedtick) +{ + if (buf->b_changed || (ff && file_ff_differs(buf, FALSE))) + { + buf->b_changed = 0; + ml_setflags(buf); + if (ff) + save_file_ff(buf); + check_status(buf); + redraw_tabline = TRUE; +#ifdef FEAT_TITLE + need_maketitle = TRUE; // set window title later +#endif + ++CHANGEDTICK(buf); + } + else if (always_inc_changedtick) + ++CHANGEDTICK(buf); +#ifdef FEAT_NETBEANS_INTG + netbeans_unmodified(buf); +#endif +} + +/* + * Save the current values of 'fileformat' and 'fileencoding', so that we know + * the file must be considered changed when the value is different. + */ + void +save_file_ff(buf_T *buf) +{ + buf->b_start_ffc = *buf->b_p_ff; + buf->b_start_eol = buf->b_p_eol; + buf->b_start_bomb = buf->b_p_bomb; + + // Only use free/alloc when necessary, they take time. + if (buf->b_start_fenc == NULL + || STRCMP(buf->b_start_fenc, buf->b_p_fenc) != 0) + { + vim_free(buf->b_start_fenc); + buf->b_start_fenc = vim_strsave(buf->b_p_fenc); + } +} + +/* + * Return TRUE if 'fileformat' and/or 'fileencoding' has a different value + * from when editing started (save_file_ff() called). + * Also when 'endofline' was changed and 'binary' is set, or when 'bomb' was + * changed and 'binary' is not set. + * Also when 'endofline' was changed and 'fixeol' is not set. + * When "ignore_empty" is true don't consider a new, empty buffer to be + * changed. + */ + int +file_ff_differs(buf_T *buf, int ignore_empty) +{ + // In a buffer that was never loaded the options are not valid. + if (buf->b_flags & BF_NEVERLOADED) + return FALSE; + if (ignore_empty + && (buf->b_flags & BF_NEW) + && buf->b_ml.ml_line_count == 1 + && *ml_get_buf(buf, (linenr_T)1, FALSE) == NUL) + return FALSE; + if (buf->b_start_ffc != *buf->b_p_ff) + return TRUE; + if ((buf->b_p_bin || !buf->b_p_fixeol) && buf->b_start_eol != buf->b_p_eol) + return TRUE; + if (!buf->b_p_bin && buf->b_start_bomb != buf->b_p_bomb) + return TRUE; + if (buf->b_start_fenc == NULL) + return (*buf->b_p_fenc != NUL); + return (STRCMP(buf->b_start_fenc, buf->b_p_fenc) != 0); +} + +/* + * Insert string "p" at the cursor position. Stops at a NUL byte. + * Handles Replace mode and multi-byte characters. + */ + void +ins_bytes(char_u *p) +{ + ins_bytes_len(p, (int)STRLEN(p)); +} + +/* + * Insert string "p" with length "len" at the cursor position. + * Handles Replace mode and multi-byte characters. + */ + void +ins_bytes_len(char_u *p, int len) +{ + int i; + int n; + + if (has_mbyte) + for (i = 0; i < len; i += n) + { + if (enc_utf8) + // avoid reading past p[len] + n = utfc_ptr2len_len(p + i, len - i); + else + n = (*mb_ptr2len)(p + i); + ins_char_bytes(p + i, n); + } + else + for (i = 0; i < len; ++i) + ins_char(p[i]); +} + +/* + * Insert or replace a single character at the cursor position. + * When in REPLACE or VREPLACE mode, replace any existing character. + * Caller must have prepared for undo. + * For multi-byte characters we get the whole character, the caller must + * convert bytes to a character. + */ + void +ins_char(int c) +{ + char_u buf[MB_MAXBYTES + 1]; + int n = (*mb_char2bytes)(c, buf); + + // When "c" is 0x100, 0x200, etc. we don't want to insert a NUL byte. + // Happens for CTRL-Vu9900. + if (buf[0] == 0) + buf[0] = '\n'; + + ins_char_bytes(buf, n); +} + + void +ins_char_bytes(char_u *buf, int charlen) +{ + int c = buf[0]; + int newlen; // nr of bytes inserted + int oldlen; // nr of bytes deleted (0 when not replacing) + char_u *p; + char_u *newp; + char_u *oldp; + int linelen; // length of old line including NUL + colnr_T col; + linenr_T lnum = curwin->w_cursor.lnum; + int i; + + // Break tabs if needed. + if (virtual_active() && curwin->w_cursor.coladd > 0) + coladvance_force(getviscol()); + + col = curwin->w_cursor.col; + oldp = ml_get(lnum); + linelen = (int)STRLEN(oldp) + 1; + + // The lengths default to the values for when not replacing. + oldlen = 0; + newlen = charlen; + + if (State & REPLACE_FLAG) + { + if (State & VREPLACE_FLAG) + { + colnr_T new_vcol = 0; // init for GCC + colnr_T vcol; + int old_list; + + // Disable 'list' temporarily, unless 'cpo' contains the 'L' flag. + // Returns the old value of list, so when finished, + // curwin->w_p_list should be set back to this. + old_list = curwin->w_p_list; + if (old_list && vim_strchr(p_cpo, CPO_LISTWM) == NULL) + curwin->w_p_list = FALSE; + + // In virtual replace mode each character may replace one or more + // characters (zero if it's a TAB). Count the number of bytes to + // be deleted to make room for the new character, counting screen + // cells. May result in adding spaces to fill a gap. + getvcol(curwin, &curwin->w_cursor, NULL, &vcol, NULL); + new_vcol = vcol + chartabsize(buf, vcol); + while (oldp[col + oldlen] != NUL && vcol < new_vcol) + { + vcol += chartabsize(oldp + col + oldlen, vcol); + // Don't need to remove a TAB that takes us to the right + // position. + if (vcol > new_vcol && oldp[col + oldlen] == TAB) + break; + oldlen += (*mb_ptr2len)(oldp + col + oldlen); + // Deleted a bit too much, insert spaces. + if (vcol > new_vcol) + newlen += vcol - new_vcol; + } + curwin->w_p_list = old_list; + } + else if (oldp[col] != NUL) + { + // normal replace + oldlen = (*mb_ptr2len)(oldp + col); + } + + + // Push the replaced bytes onto the replace stack, so that they can be + // put back when BS is used. The bytes of a multi-byte character are + // done the other way around, so that the first byte is popped off + // first (it tells the byte length of the character). + replace_push(NUL); + for (i = 0; i < oldlen; ++i) + { + if (has_mbyte) + i += replace_push_mb(oldp + col + i) - 1; + else + replace_push(oldp[col + i]); + } + } + + newp = alloc(linelen + newlen - oldlen); + if (newp == NULL) + return; + + // Copy bytes before the cursor. + if (col > 0) + mch_memmove(newp, oldp, (size_t)col); + + // Copy bytes after the changed character(s). + p = newp + col; + if (linelen > col + oldlen) + mch_memmove(p + newlen, oldp + col + oldlen, + (size_t)(linelen - col - oldlen)); + + // Insert or overwrite the new character. + mch_memmove(p, buf, charlen); + i = charlen; + + // Fill with spaces when necessary. + while (i < newlen) + p[i++] = ' '; + + // Replace the line in the buffer. + ml_replace(lnum, newp, FALSE); + + // mark the buffer as changed and prepare for displaying + inserted_bytes(lnum, col, newlen - oldlen); + + // If we're in Insert or Replace mode and 'showmatch' is set, then briefly + // show the match for right parens and braces. + if (p_sm && (State & INSERT) + && msg_silent == 0 + && !ins_compl_active()) + { + if (has_mbyte) + showmatch(mb_ptr2char(buf)); + else + showmatch(c); + } + +#ifdef FEAT_RIGHTLEFT + if (!p_ri || (State & REPLACE_FLAG)) +#endif + { + // Normal insert: move cursor right + curwin->w_cursor.col += charlen; + } + + // TODO: should try to update w_row here, to avoid recomputing it later. +} + +/* + * Insert a string at the cursor position. + * Note: Does NOT handle Replace mode. + * Caller must have prepared for undo. + */ + void +ins_str(char_u *s) +{ + char_u *oldp, *newp; + int newlen = (int)STRLEN(s); + int oldlen; + colnr_T col; + linenr_T lnum = curwin->w_cursor.lnum; + + if (virtual_active() && curwin->w_cursor.coladd > 0) + coladvance_force(getviscol()); + + col = curwin->w_cursor.col; + oldp = ml_get(lnum); + oldlen = (int)STRLEN(oldp); + + newp = alloc(oldlen + newlen + 1); + if (newp == NULL) + return; + if (col > 0) + mch_memmove(newp, oldp, (size_t)col); + mch_memmove(newp + col, s, (size_t)newlen); + mch_memmove(newp + col + newlen, oldp + col, (size_t)(oldlen - col + 1)); + ml_replace(lnum, newp, FALSE); + inserted_bytes(lnum, col, newlen); + curwin->w_cursor.col += newlen; +} + +/* + * Delete one character under the cursor. + * If "fixpos" is TRUE, don't leave the cursor on the NUL after the line. + * Caller must have prepared for undo. + * + * return FAIL for failure, OK otherwise + */ + int +del_char(int fixpos) +{ + if (has_mbyte) + { + // Make sure the cursor is at the start of a character. + mb_adjust_cursor(); + if (*ml_get_cursor() == NUL) + return FAIL; + return del_chars(1L, fixpos); + } + return del_bytes(1L, fixpos, TRUE); +} + +/* + * Like del_bytes(), but delete characters instead of bytes. + */ + int +del_chars(long count, int fixpos) +{ + long bytes = 0; + long i; + char_u *p; + int l; + + p = ml_get_cursor(); + for (i = 0; i < count && *p != NUL; ++i) + { + l = (*mb_ptr2len)(p); + bytes += l; + p += l; + } + return del_bytes(bytes, fixpos, TRUE); +} + +/* + * Delete "count" bytes under the cursor. + * If "fixpos" is TRUE, don't leave the cursor on the NUL after the line. + * Caller must have prepared for undo. + * + * Return FAIL for failure, OK otherwise. + */ + int +del_bytes( + long count, + int fixpos_arg, + int use_delcombine UNUSED) // 'delcombine' option applies +{ + char_u *oldp, *newp; + colnr_T oldlen; + colnr_T newlen; + linenr_T lnum = curwin->w_cursor.lnum; + colnr_T col = curwin->w_cursor.col; + int alloc_newp; + long movelen; + int fixpos = fixpos_arg; + + oldp = ml_get(lnum); + oldlen = (int)STRLEN(oldp); + + // Can't do anything when the cursor is on the NUL after the line. + if (col >= oldlen) + return FAIL; + + // If "count" is zero there is nothing to do. + if (count == 0) + return OK; + + // If "count" is negative the caller must be doing something wrong. + if (count < 1) + { + siemsg("E292: Invalid count for del_bytes(): %ld", count); + return FAIL; + } + + // If 'delcombine' is set and deleting (less than) one character, only + // delete the last combining character. + if (p_deco && use_delcombine && enc_utf8 + && utfc_ptr2len(oldp + col) >= count) + { + int cc[MAX_MCO]; + int n; + + (void)utfc_ptr2char(oldp + col, cc); + if (cc[0] != NUL) + { + // Find the last composing char, there can be several. + n = col; + do + { + col = n; + count = utf_ptr2len(oldp + n); + n += count; + } while (UTF_COMPOSINGLIKE(oldp + col, oldp + n)); + fixpos = 0; + } + } + + // When count is too big, reduce it. + movelen = (long)oldlen - (long)col - count + 1; // includes trailing NUL + if (movelen <= 1) + { + // If we just took off the last character of a non-blank line, and + // fixpos is TRUE, we don't want to end up positioned at the NUL, + // unless "restart_edit" is set or 'virtualedit' contains "onemore". + if (col > 0 && fixpos && restart_edit == 0 + && (ve_flags & VE_ONEMORE) == 0) + { + --curwin->w_cursor.col; + curwin->w_cursor.coladd = 0; + if (has_mbyte) + curwin->w_cursor.col -= + (*mb_head_off)(oldp, oldp + curwin->w_cursor.col); + } + count = oldlen - col; + movelen = 1; + } + newlen = oldlen - count; + + // If the old line has been allocated the deletion can be done in the + // existing line. Otherwise a new line has to be allocated + // Can't do this when using Netbeans, because we would need to invoke + // netbeans_removed(), which deallocates the line. Let ml_replace() take + // care of notifying Netbeans. +#ifdef FEAT_NETBEANS_INTG + if (netbeans_active()) + alloc_newp = TRUE; + else +#endif + alloc_newp = !ml_line_alloced(); // check if oldp was allocated + if (!alloc_newp) + newp = oldp; // use same allocated memory + else + { // need to allocate a new line + newp = alloc(newlen + 1); + if (newp == NULL) + return FAIL; + mch_memmove(newp, oldp, (size_t)col); + } + mch_memmove(newp + col, oldp + col + count, (size_t)movelen); + if (alloc_newp) + ml_replace(lnum, newp, FALSE); +#ifdef FEAT_PROP_POPUP + else + { + // Also move any following text properties. + if (oldlen + 1 < curbuf->b_ml.ml_line_len) + mch_memmove(newp + newlen + 1, oldp + oldlen + 1, + (size_t)curbuf->b_ml.ml_line_len - oldlen - 1); + curbuf->b_ml.ml_line_len -= count; + } +#endif + + // mark the buffer as changed and prepare for displaying + inserted_bytes(lnum, col, -count); + + return OK; +} + +/* + * open_line: Add a new line below or above the current line. + * + * For VREPLACE mode, we only add a new line when we get to the end of the + * file, otherwise we just start replacing the next line. + * + * Caller must take care of undo. Since VREPLACE may affect any number of + * lines however, it may call u_save_cursor() again when starting to change a + * new line. + * "flags": OPENLINE_DELSPACES delete spaces after cursor + * OPENLINE_DO_COM format comments + * OPENLINE_KEEPTRAIL keep trailing spaces + * OPENLINE_MARKFIX adjust mark positions after the line break + * OPENLINE_COM_LIST format comments with list or 2nd line indent + * + * "second_line_indent": indent for after ^^D in Insert mode or if flag + * OPENLINE_COM_LIST + * + * Return OK for success, FAIL for failure + */ + int +open_line( + int dir, // FORWARD or BACKWARD + int flags, + int second_line_indent) +{ + char_u *saved_line; // copy of the original line + char_u *next_line = NULL; // copy of the next line + char_u *p_extra = NULL; // what goes to next line + int less_cols = 0; // less columns for mark in new line + int less_cols_off = 0; // columns to skip for mark adjust + pos_T old_cursor; // old cursor position + int newcol = 0; // new cursor column + int newindent = 0; // auto-indent of the new line + int n; + int trunc_line = FALSE; // truncate current line afterwards + int retval = FAIL; // return value + int extra_len = 0; // length of p_extra string + int lead_len; // length of comment leader + char_u *lead_flags; // position in 'comments' for comment leader + char_u *leader = NULL; // copy of comment leader + char_u *allocated = NULL; // allocated memory + char_u *p; + int saved_char = NUL; // init for GCC + pos_T *pos; +#ifdef FEAT_SMARTINDENT + int do_si = (!p_paste && curbuf->b_p_si +# ifdef FEAT_CINDENT + && !curbuf->b_p_cin +# endif +# ifdef FEAT_EVAL + && *curbuf->b_p_inde == NUL +# endif + ); + int no_si = FALSE; // reset did_si afterwards + int first_char = NUL; // init for GCC +#endif +#if defined(FEAT_LISP) || defined(FEAT_CINDENT) + int vreplace_mode; +#endif + int did_append; // appended a new line + int saved_pi = curbuf->b_p_pi; // copy of preserveindent setting + + // make a copy of the current line so we can mess with it + saved_line = vim_strsave(ml_get_curline()); + if (saved_line == NULL) // out of memory! + return FALSE; + + if (State & VREPLACE_FLAG) + { + // With VREPLACE we make a copy of the next line, which we will be + // starting to replace. First make the new line empty and let vim play + // with the indenting and comment leader to its heart's content. Then + // we grab what it ended up putting on the new line, put back the + // original line, and call ins_char() to put each new character onto + // the line, replacing what was there before and pushing the right + // stuff onto the replace stack. -- webb. + if (curwin->w_cursor.lnum < orig_line_count) + next_line = vim_strsave(ml_get(curwin->w_cursor.lnum + 1)); + else + next_line = vim_strsave((char_u *)""); + if (next_line == NULL) // out of memory! + goto theend; + + // In VREPLACE mode, a NL replaces the rest of the line, and starts + // replacing the next line, so push all of the characters left on the + // line onto the replace stack. We'll push any other characters that + // might be replaced at the start of the next line (due to autoindent + // etc) a bit later. + replace_push(NUL); // Call twice because BS over NL expects it + replace_push(NUL); + p = saved_line + curwin->w_cursor.col; + while (*p != NUL) + { + if (has_mbyte) + p += replace_push_mb(p); + else + replace_push(*p++); + } + saved_line[curwin->w_cursor.col] = NUL; + } + + if ((State & INSERT) && !(State & VREPLACE_FLAG)) + { + p_extra = saved_line + curwin->w_cursor.col; +#ifdef FEAT_SMARTINDENT + if (do_si) // need first char after new line break + { + p = skipwhite(p_extra); + first_char = *p; + } +#endif + extra_len = (int)STRLEN(p_extra); + saved_char = *p_extra; + *p_extra = NUL; + } + + u_clearline(); // cannot do "U" command when adding lines +#ifdef FEAT_SMARTINDENT + did_si = FALSE; +#endif + ai_col = 0; + + // If we just did an auto-indent, then we didn't type anything on + // the prior line, and it should be truncated. Do this even if 'ai' is not + // set because automatically inserting a comment leader also sets did_ai. + if (dir == FORWARD && did_ai) + trunc_line = TRUE; + + // If 'autoindent' and/or 'smartindent' is set, try to figure out what + // indent to use for the new line. + if (curbuf->b_p_ai +#ifdef FEAT_SMARTINDENT + || do_si +#endif + ) + { + // count white space on current line +#ifdef FEAT_VARTABS + newindent = get_indent_str_vtab(saved_line, curbuf->b_p_ts, + curbuf->b_p_vts_array, FALSE); +#else + newindent = get_indent_str(saved_line, (int)curbuf->b_p_ts, FALSE); +#endif + if (newindent == 0 && !(flags & OPENLINE_COM_LIST)) + newindent = second_line_indent; // for ^^D command in insert mode + +#ifdef FEAT_SMARTINDENT + // Do smart indenting. + // In insert/replace mode (only when dir == FORWARD) + // we may move some text to the next line. If it starts with '{' + // don't add an indent. Fixes inserting a NL before '{' in line + // "if (condition) {" + if (!trunc_line && do_si && *saved_line != NUL + && (p_extra == NULL || first_char != '{')) + { + char_u *ptr; + char_u last_char; + + old_cursor = curwin->w_cursor; + ptr = saved_line; + if (flags & OPENLINE_DO_COM) + lead_len = get_leader_len(ptr, NULL, FALSE, TRUE); + else + lead_len = 0; + if (dir == FORWARD) + { + // Skip preprocessor directives, unless they are + // recognised as comments. + if ( lead_len == 0 && ptr[0] == '#') + { + while (ptr[0] == '#' && curwin->w_cursor.lnum > 1) + ptr = ml_get(--curwin->w_cursor.lnum); + newindent = get_indent(); + } + if (flags & OPENLINE_DO_COM) + lead_len = get_leader_len(ptr, NULL, FALSE, TRUE); + else + lead_len = 0; + if (lead_len > 0) + { + // This case gets the following right: + // /* + // * A comment (read '\' as '/'). + // */ + // #define IN_THE_WAY + // This should line up here; + p = skipwhite(ptr); + if (p[0] == '/' && p[1] == '*') + p++; + if (p[0] == '*') + { + for (p++; *p; p++) + { + if (p[0] == '/' && p[-1] == '*') + { + // End of C comment, indent should line up + // with the line containing the start of + // the comment + curwin->w_cursor.col = (colnr_T)(p - ptr); + if ((pos = findmatch(NULL, NUL)) != NULL) + { + curwin->w_cursor.lnum = pos->lnum; + newindent = get_indent(); + } + } + } + } + } + else // Not a comment line + { + // Find last non-blank in line + p = ptr + STRLEN(ptr) - 1; + while (p > ptr && VIM_ISWHITE(*p)) + --p; + last_char = *p; + + // find the character just before the '{' or ';' + if (last_char == '{' || last_char == ';') + { + if (p > ptr) + --p; + while (p > ptr && VIM_ISWHITE(*p)) + --p; + } + // Try to catch lines that are split over multiple + // lines. eg: + // if (condition && + // condition) { + // Should line up here! + // } + if (*p == ')') + { + curwin->w_cursor.col = (colnr_T)(p - ptr); + if ((pos = findmatch(NULL, '(')) != NULL) + { + curwin->w_cursor.lnum = pos->lnum; + newindent = get_indent(); + ptr = ml_get_curline(); + } + } + // If last character is '{' do indent, without + // checking for "if" and the like. + if (last_char == '{') + { + did_si = TRUE; // do indent + no_si = TRUE; // don't delete it when '{' typed + } + // Look for "if" and the like, use 'cinwords'. + // Don't do this if the previous line ended in ';' or + // '}'. + else if (last_char != ';' && last_char != '}' + && cin_is_cinword(ptr)) + did_si = TRUE; + } + } + else // dir == BACKWARD + { + // Skip preprocessor directives, unless they are + // recognised as comments. + if (lead_len == 0 && ptr[0] == '#') + { + int was_backslashed = FALSE; + + while ((ptr[0] == '#' || was_backslashed) && + curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count) + { + if (*ptr && ptr[STRLEN(ptr) - 1] == '\\') + was_backslashed = TRUE; + else + was_backslashed = FALSE; + ptr = ml_get(++curwin->w_cursor.lnum); + } + if (was_backslashed) + newindent = 0; // Got to end of file + else + newindent = get_indent(); + } + p = skipwhite(ptr); + if (*p == '}') // if line starts with '}': do indent + did_si = TRUE; + else // can delete indent when '{' typed + can_si_back = TRUE; + } + curwin->w_cursor = old_cursor; + } + if (do_si) + can_si = TRUE; +#endif // FEAT_SMARTINDENT + + did_ai = TRUE; + } + + // Find out if the current line starts with a comment leader. + // This may then be inserted in front of the new line. + end_comment_pending = NUL; + if (flags & OPENLINE_DO_COM) + lead_len = get_leader_len(saved_line, &lead_flags, + dir == BACKWARD, TRUE); + else + lead_len = 0; + if (lead_len > 0) + { + char_u *lead_repl = NULL; // replaces comment leader + int lead_repl_len = 0; // length of *lead_repl + char_u lead_middle[COM_MAX_LEN]; // middle-comment string + char_u lead_end[COM_MAX_LEN]; // end-comment string + char_u *comment_end = NULL; // where lead_end has been found + int extra_space = FALSE; // append extra space + int current_flag; + int require_blank = FALSE; // requires blank after middle + char_u *p2; + + // If the comment leader has the start, middle or end flag, it may not + // be used or may be replaced with the middle leader. + for (p = lead_flags; *p && *p != ':'; ++p) + { + if (*p == COM_BLANK) + { + require_blank = TRUE; + continue; + } + if (*p == COM_START || *p == COM_MIDDLE) + { + current_flag = *p; + if (*p == COM_START) + { + // Doing "O" on a start of comment does not insert leader. + if (dir == BACKWARD) + { + lead_len = 0; + break; + } + + // find start of middle part + (void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ","); + require_blank = FALSE; + } + + // Isolate the strings of the middle and end leader. + while (*p && p[-1] != ':') // find end of middle flags + { + if (*p == COM_BLANK) + require_blank = TRUE; + ++p; + } + (void)copy_option_part(&p, lead_middle, COM_MAX_LEN, ","); + + while (*p && p[-1] != ':') // find end of end flags + { + // Check whether we allow automatic ending of comments + if (*p == COM_AUTO_END) + end_comment_pending = -1; // means we want to set it + ++p; + } + n = copy_option_part(&p, lead_end, COM_MAX_LEN, ","); + + if (end_comment_pending == -1) // we can set it now + end_comment_pending = lead_end[n - 1]; + + // If the end of the comment is in the same line, don't use + // the comment leader. + if (dir == FORWARD) + { + for (p = saved_line + lead_len; *p; ++p) + if (STRNCMP(p, lead_end, n) == 0) + { + comment_end = p; + lead_len = 0; + break; + } + } + + // Doing "o" on a start of comment inserts the middle leader. + if (lead_len > 0) + { + if (current_flag == COM_START) + { + lead_repl = lead_middle; + lead_repl_len = (int)STRLEN(lead_middle); + } + + // If we have hit RETURN immediately after the start + // comment leader, then put a space after the middle + // comment leader on the next line. + if (!VIM_ISWHITE(saved_line[lead_len - 1]) + && ((p_extra != NULL + && (int)curwin->w_cursor.col == lead_len) + || (p_extra == NULL + && saved_line[lead_len] == NUL) + || require_blank)) + extra_space = TRUE; + } + break; + } + if (*p == COM_END) + { + // Doing "o" on the end of a comment does not insert leader. + // Remember where the end is, might want to use it to find the + // start (for C-comments). + if (dir == FORWARD) + { + comment_end = skipwhite(saved_line); + lead_len = 0; + break; + } + + // Doing "O" on the end of a comment inserts the middle leader. + // Find the string for the middle leader, searching backwards. + while (p > curbuf->b_p_com && *p != ',') + --p; + for (lead_repl = p; lead_repl > curbuf->b_p_com + && lead_repl[-1] != ':'; --lead_repl) + ; + lead_repl_len = (int)(p - lead_repl); + + // We can probably always add an extra space when doing "O" on + // the comment-end + extra_space = TRUE; + + // Check whether we allow automatic ending of comments + for (p2 = p; *p2 && *p2 != ':'; p2++) + { + if (*p2 == COM_AUTO_END) + end_comment_pending = -1; // means we want to set it + } + if (end_comment_pending == -1) + { + // Find last character in end-comment string + while (*p2 && *p2 != ',') + p2++; + end_comment_pending = p2[-1]; + } + break; + } + if (*p == COM_FIRST) + { + // Comment leader for first line only: Don't repeat leader + // when using "O", blank out leader when using "o". + if (dir == BACKWARD) + lead_len = 0; + else + { + lead_repl = (char_u *)""; + lead_repl_len = 0; + } + break; + } + } + if (lead_len) + { + // allocate buffer (may concatenate p_extra later) + leader = alloc(lead_len + lead_repl_len + extra_space + extra_len + + (second_line_indent > 0 ? second_line_indent : 0) + 1); + allocated = leader; // remember to free it later + + if (leader == NULL) + lead_len = 0; + else + { + vim_strncpy(leader, saved_line, lead_len); + + // Replace leader with lead_repl, right or left adjusted + if (lead_repl != NULL) + { + int c = 0; + int off = 0; + + for (p = lead_flags; *p != NUL && *p != ':'; ) + { + if (*p == COM_RIGHT || *p == COM_LEFT) + c = *p++; + else if (VIM_ISDIGIT(*p) || *p == '-') + off = getdigits(&p); + else + ++p; + } + if (c == COM_RIGHT) // right adjusted leader + { + // find last non-white in the leader to line up with + for (p = leader + lead_len - 1; p > leader + && VIM_ISWHITE(*p); --p) + ; + ++p; + + // Compute the length of the replaced characters in + // screen characters, not bytes. + { + int repl_size = vim_strnsize(lead_repl, + lead_repl_len); + int old_size = 0; + char_u *endp = p; + int l; + + while (old_size < repl_size && p > leader) + { + MB_PTR_BACK(leader, p); + old_size += ptr2cells(p); + } + l = lead_repl_len - (int)(endp - p); + if (l != 0) + mch_memmove(endp + l, endp, + (size_t)((leader + lead_len) - endp)); + lead_len += l; + } + mch_memmove(p, lead_repl, (size_t)lead_repl_len); + if (p + lead_repl_len > leader + lead_len) + p[lead_repl_len] = NUL; + + // blank-out any other chars from the old leader. + while (--p >= leader) + { + int l = mb_head_off(leader, p); + + if (l > 1) + { + p -= l; + if (ptr2cells(p) > 1) + { + p[1] = ' '; + --l; + } + mch_memmove(p + 1, p + l + 1, + (size_t)((leader + lead_len) - (p + l + 1))); + lead_len -= l; + *p = ' '; + } + else if (!VIM_ISWHITE(*p)) + *p = ' '; + } + } + else // left adjusted leader + { + p = skipwhite(leader); + + // Compute the length of the replaced characters in + // screen characters, not bytes. Move the part that is + // not to be overwritten. + { + int repl_size = vim_strnsize(lead_repl, + lead_repl_len); + int i; + int l; + + for (i = 0; i < lead_len && p[i] != NUL; i += l) + { + l = (*mb_ptr2len)(p + i); + if (vim_strnsize(p, i + l) > repl_size) + break; + } + if (i != lead_repl_len) + { + mch_memmove(p + lead_repl_len, p + i, + (size_t)(lead_len - i - (p - leader))); + lead_len += lead_repl_len - i; + } + } + mch_memmove(p, lead_repl, (size_t)lead_repl_len); + + // Replace any remaining non-white chars in the old + // leader by spaces. Keep Tabs, the indent must + // remain the same. + for (p += lead_repl_len; p < leader + lead_len; ++p) + if (!VIM_ISWHITE(*p)) + { + // Don't put a space before a TAB. + if (p + 1 < leader + lead_len && p[1] == TAB) + { + --lead_len; + mch_memmove(p, p + 1, + (leader + lead_len) - p); + } + else + { + int l = (*mb_ptr2len)(p); + + if (l > 1) + { + if (ptr2cells(p) > 1) + { + // Replace a double-wide char with + // two spaces + --l; + *p++ = ' '; + } + mch_memmove(p + 1, p + l, + (leader + lead_len) - p); + lead_len -= l - 1; + } + *p = ' '; + } + } + *p = NUL; + } + + // Recompute the indent, it may have changed. + if (curbuf->b_p_ai +#ifdef FEAT_SMARTINDENT + || do_si +#endif + ) +#ifdef FEAT_VARTABS + newindent = get_indent_str_vtab(leader, curbuf->b_p_ts, + curbuf->b_p_vts_array, FALSE); +#else + newindent = get_indent_str(leader, + (int)curbuf->b_p_ts, FALSE); +#endif + + // Add the indent offset + if (newindent + off < 0) + { + off = -newindent; + newindent = 0; + } + else + newindent += off; + + // Correct trailing spaces for the shift, so that + // alignment remains equal. + while (off > 0 && lead_len > 0 + && leader[lead_len - 1] == ' ') + { + // Don't do it when there is a tab before the space + if (vim_strchr(skipwhite(leader), '\t') != NULL) + break; + --lead_len; + --off; + } + + // If the leader ends in white space, don't add an + // extra space + if (lead_len > 0 && VIM_ISWHITE(leader[lead_len - 1])) + extra_space = FALSE; + leader[lead_len] = NUL; + } + + if (extra_space) + { + leader[lead_len++] = ' '; + leader[lead_len] = NUL; + } + + newcol = lead_len; + + // if a new indent will be set below, remove the indent that + // is in the comment leader + if (newindent +#ifdef FEAT_SMARTINDENT + || did_si +#endif + ) + { + while (lead_len && VIM_ISWHITE(*leader)) + { + --lead_len; + --newcol; + ++leader; + } + } + + } +#ifdef FEAT_SMARTINDENT + did_si = can_si = FALSE; +#endif + } + else if (comment_end != NULL) + { + // We have finished a comment, so we don't use the leader. + // If this was a C-comment and 'ai' or 'si' is set do a normal + // indent to align with the line containing the start of the + // comment. + if (comment_end[0] == '*' && comment_end[1] == '/' && + (curbuf->b_p_ai +#ifdef FEAT_SMARTINDENT + || do_si +#endif + )) + { + old_cursor = curwin->w_cursor; + curwin->w_cursor.col = (colnr_T)(comment_end - saved_line); + if ((pos = findmatch(NULL, NUL)) != NULL) + { + curwin->w_cursor.lnum = pos->lnum; + newindent = get_indent(); + } + curwin->w_cursor = old_cursor; + } + } + } + + // (State == INSERT || State == REPLACE), only when dir == FORWARD + if (p_extra != NULL) + { + *p_extra = saved_char; // restore char that NUL replaced + + // When 'ai' set or "flags" has OPENLINE_DELSPACES, skip to the first + // non-blank. + // + // When in REPLACE mode, put the deleted blanks on the replace stack, + // preceded by a NUL, so they can be put back when a BS is entered. + if (REPLACE_NORMAL(State)) + replace_push(NUL); // end of extra blanks + if (curbuf->b_p_ai || (flags & OPENLINE_DELSPACES)) + { + while ((*p_extra == ' ' || *p_extra == '\t') + && (!enc_utf8 + || !utf_iscomposing(utf_ptr2char(p_extra + 1)))) + { + if (REPLACE_NORMAL(State)) + replace_push(*p_extra); + ++p_extra; + ++less_cols_off; + } + } + + // columns for marks adjusted for removed columns + less_cols = (int)(p_extra - saved_line); + } + + if (p_extra == NULL) + p_extra = (char_u *)""; // append empty line + + // concatenate leader and p_extra, if there is a leader + if (lead_len) + { + if (flags & OPENLINE_COM_LIST && second_line_indent > 0) + { + int i; + int padding = second_line_indent + - (newindent + (int)STRLEN(leader)); + + // Here whitespace is inserted after the comment char. + // Below, set_indent(newindent, SIN_INSERT) will insert the + // whitespace needed before the comment char. + for (i = 0; i < padding; i++) + { + STRCAT(leader, " "); + less_cols--; + newcol++; + } + } + STRCAT(leader, p_extra); + p_extra = leader; + did_ai = TRUE; // So truncating blanks works with comments + less_cols -= lead_len; + } + else + end_comment_pending = NUL; // turns out there was no leader + + old_cursor = curwin->w_cursor; + if (dir == BACKWARD) + --curwin->w_cursor.lnum; + if (!(State & VREPLACE_FLAG) || old_cursor.lnum >= orig_line_count) + { + if (ml_append(curwin->w_cursor.lnum, p_extra, (colnr_T)0, FALSE) + == FAIL) + goto theend; + // Postpone calling changed_lines(), because it would mess up folding + // with markers. + // Skip mark_adjust when adding a line after the last one, there can't + // be marks there. But still needed in diff mode. + if (curwin->w_cursor.lnum + 1 < curbuf->b_ml.ml_line_count +#ifdef FEAT_DIFF + || curwin->w_p_diff +#endif + ) + mark_adjust(curwin->w_cursor.lnum + 1, (linenr_T)MAXLNUM, 1L, 0L); + did_append = TRUE; +#ifdef FEAT_PROP_POPUP + if ((State & INSERT) && !(State & VREPLACE_FLAG)) + // properties after the split move to the next line + adjust_props_for_split(curwin->w_cursor.lnum, curwin->w_cursor.lnum, + curwin->w_cursor.col + 1, 0); +#endif + } + else + { + // In VREPLACE mode we are starting to replace the next line. + curwin->w_cursor.lnum++; + if (curwin->w_cursor.lnum >= Insstart.lnum + vr_lines_changed) + { + // In case we NL to a new line, BS to the previous one, and NL + // again, we don't want to save the new line for undo twice. + (void)u_save_cursor(); // errors are ignored! + vr_lines_changed++; + } + ml_replace(curwin->w_cursor.lnum, p_extra, TRUE); + changed_bytes(curwin->w_cursor.lnum, 0); + curwin->w_cursor.lnum--; + did_append = FALSE; + } + + if (newindent +#ifdef FEAT_SMARTINDENT + || did_si +#endif + ) + { + ++curwin->w_cursor.lnum; +#ifdef FEAT_SMARTINDENT + if (did_si) + { + int sw = (int)get_sw_value(curbuf); + + if (p_sr) + newindent -= newindent % sw; + newindent += sw; + } +#endif + // Copy the indent + if (curbuf->b_p_ci) + { + (void)copy_indent(newindent, saved_line); + + // Set the 'preserveindent' option so that any further screwing + // with the line doesn't entirely destroy our efforts to preserve + // it. It gets restored at the function end. + curbuf->b_p_pi = TRUE; + } + else + (void)set_indent(newindent, SIN_INSERT); + less_cols -= curwin->w_cursor.col; + + ai_col = curwin->w_cursor.col; + + // In REPLACE mode, for each character in the new indent, there must + // be a NUL on the replace stack, for when it is deleted with BS + if (REPLACE_NORMAL(State)) + for (n = 0; n < (int)curwin->w_cursor.col; ++n) + replace_push(NUL); + newcol += curwin->w_cursor.col; +#ifdef FEAT_SMARTINDENT + if (no_si) + did_si = FALSE; +#endif + } + + // In REPLACE mode, for each character in the extra leader, there must be + // a NUL on the replace stack, for when it is deleted with BS. + if (REPLACE_NORMAL(State)) + while (lead_len-- > 0) + replace_push(NUL); + + curwin->w_cursor = old_cursor; + + if (dir == FORWARD) + { + if (trunc_line || (State & INSERT)) + { + // truncate current line at cursor + saved_line[curwin->w_cursor.col] = NUL; + // Remove trailing white space, unless OPENLINE_KEEPTRAIL used. + if (trunc_line && !(flags & OPENLINE_KEEPTRAIL)) + truncate_spaces(saved_line); + ml_replace(curwin->w_cursor.lnum, saved_line, FALSE); + saved_line = NULL; + if (did_append) + { + changed_lines(curwin->w_cursor.lnum, curwin->w_cursor.col, + curwin->w_cursor.lnum + 1, 1L); + did_append = FALSE; + + // Move marks after the line break to the new line. + if (flags & OPENLINE_MARKFIX) + mark_col_adjust(curwin->w_cursor.lnum, + curwin->w_cursor.col + less_cols_off, + 1L, (long)-less_cols, 0); + } + else + changed_bytes(curwin->w_cursor.lnum, curwin->w_cursor.col); + } + + // Put the cursor on the new line. Careful: the scrollup() above may + // have moved w_cursor, we must use old_cursor. + curwin->w_cursor.lnum = old_cursor.lnum + 1; + } + if (did_append) + changed_lines(curwin->w_cursor.lnum, 0, curwin->w_cursor.lnum, 1L); + + curwin->w_cursor.col = newcol; + curwin->w_cursor.coladd = 0; + +#if defined(FEAT_LISP) || defined(FEAT_CINDENT) + // In VREPLACE mode, we are handling the replace stack ourselves, so stop + // fixthisline() from doing it (via change_indent()) by telling it we're in + // normal INSERT mode. + if (State & VREPLACE_FLAG) + { + vreplace_mode = State; // So we know to put things right later + State = INSERT; + } + else + vreplace_mode = 0; +#endif +#ifdef FEAT_LISP + // May do lisp indenting. + if (!p_paste + && leader == NULL + && curbuf->b_p_lisp + && curbuf->b_p_ai) + { + fixthisline(get_lisp_indent); + ai_col = (colnr_T)getwhitecols_curline(); + } +#endif +#ifdef FEAT_CINDENT + // May do indenting after opening a new line. + if (!p_paste + && (curbuf->b_p_cin +# ifdef FEAT_EVAL + || *curbuf->b_p_inde != NUL +# endif + ) + && in_cinkeys(dir == FORWARD + ? KEY_OPEN_FORW + : KEY_OPEN_BACK, ' ', linewhite(curwin->w_cursor.lnum))) + { + do_c_expr_indent(); + ai_col = (colnr_T)getwhitecols_curline(); + } +#endif +#if defined(FEAT_LISP) || defined(FEAT_CINDENT) + if (vreplace_mode != 0) + State = vreplace_mode; +#endif + + // Finally, VREPLACE gets the stuff on the new line, then puts back the + // original line, and inserts the new stuff char by char, pushing old stuff + // onto the replace stack (via ins_char()). + if (State & VREPLACE_FLAG) + { + // Put new line in p_extra + p_extra = vim_strsave(ml_get_curline()); + if (p_extra == NULL) + goto theend; + + // Put back original line + ml_replace(curwin->w_cursor.lnum, next_line, FALSE); + + // Insert new stuff into line again + curwin->w_cursor.col = 0; + curwin->w_cursor.coladd = 0; + ins_bytes(p_extra); // will call changed_bytes() + vim_free(p_extra); + next_line = NULL; + } + + retval = OK; // success! +theend: + curbuf->b_p_pi = saved_pi; + vim_free(saved_line); + vim_free(next_line); + vim_free(allocated); + return retval; +} + +/* + * Delete from cursor to end of line. + * Caller must have prepared for undo. + * If "fixpos" is TRUE fix the cursor position when done. + * + * Return FAIL for failure, OK otherwise. + */ + int +truncate_line(int fixpos) +{ + char_u *newp; + linenr_T lnum = curwin->w_cursor.lnum; + colnr_T col = curwin->w_cursor.col; + + if (col == 0) + newp = vim_strsave((char_u *)""); + else + newp = vim_strnsave(ml_get(lnum), col); + + if (newp == NULL) + return FAIL; + + ml_replace(lnum, newp, FALSE); + + // mark the buffer as changed and prepare for displaying + changed_bytes(lnum, curwin->w_cursor.col); + + // If "fixpos" is TRUE we don't want to end up positioned at the NUL. + if (fixpos && curwin->w_cursor.col > 0) + --curwin->w_cursor.col; + + return OK; +} + +/* + * Delete "nlines" lines at the cursor. + * Saves the lines for undo first if "undo" is TRUE. + */ + void +del_lines(long nlines, int undo) +{ + long n; + linenr_T first = curwin->w_cursor.lnum; + + if (nlines <= 0) + return; + + // save the deleted lines for undo + if (undo && u_savedel(first, nlines) == FAIL) + return; + + for (n = 0; n < nlines; ) + { + if (curbuf->b_ml.ml_flags & ML_EMPTY) // nothing to delete + break; + + ml_delete_flags(first, ML_DEL_MESSAGE); + ++n; + + // If we delete the last line in the file, stop + if (first > curbuf->b_ml.ml_line_count) + break; + } + + // Correct the cursor position before calling deleted_lines_mark(), it may + // trigger a callback to display the cursor. + curwin->w_cursor.col = 0; + check_cursor_lnum(); + + // adjust marks, mark the buffer as changed and prepare for displaying + deleted_lines_mark(first, n); +} |