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Diffstat (limited to 'src/viewer/actions_cmd.c')
| -rw-r--r-- | src/viewer/actions_cmd.c | 789 |
1 files changed, 789 insertions, 0 deletions
diff --git a/src/viewer/actions_cmd.c b/src/viewer/actions_cmd.c new file mode 100644 index 0000000..40c27cd --- /dev/null +++ b/src/viewer/actions_cmd.c @@ -0,0 +1,789 @@ +/* + Internal file viewer for the Midnight Commander + Callback function for some actions (hotkeys, menu) + + Copyright (C) 1994-2022 + Free Software Foundation, Inc. + + Written by: + Miguel de Icaza, 1994, 1995, 1998 + Janne Kukonlehto, 1994, 1995 + Jakub Jelinek, 1995 + Joseph M. Hinkle, 1996 + Norbert Warmuth, 1997 + Pavel Machek, 1998 + Roland Illig <roland.illig@gmx.de>, 2004, 2005 + Slava Zanko <slavazanko@google.com>, 2009, 2013 + Andrew Borodin <aborodin@vmail.ru>, 2009-2022 + Ilia Maslakov <il.smind@gmail.com>, 2009 + + This file is part of the Midnight Commander. + + The Midnight Commander is free software: you can redistribute it + and/or modify it under the terms of the GNU General Public License as + published by the Free Software Foundation, either version 3 of the License, + or (at your option) any later version. + + The Midnight Commander is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/* + The functions in this section can be bound to hotkeys. They are all + of the same type (taking a pointer to WView as parameter and + returning void). TODO: In the not-too-distant future, these commands + will become fully configurable, like they already are in the + internal editor. By convention, all the function names end in + "_cmd". + */ + +#include <config.h> + +#include <errno.h> +#include <stdlib.h> + +#include "lib/global.h" + +#include "lib/tty/tty.h" +#include "lib/tty/key.h" /* is_idle() */ +#include "lib/lock.h" /* lock_file() */ +#include "lib/util.h" +#include "lib/widget.h" +#ifdef HAVE_CHARSET +#include "lib/charsets.h" +#endif +#include "lib/event.h" /* mc_event_raise() */ +#include "lib/mcconfig.h" /* mc_config_history_get() */ + +#include "src/filemanager/layout.h" +#include "src/filemanager/filemanager.h" /* current_panel */ +#include "src/filemanager/ext.h" /* regex_command_for() */ + +#include "src/history.h" +#include "src/file_history.h" /* show_file_history() */ +#include "src/execute.h" +#include "src/keymap.h" + +#include "internal.h" + +/*** global variables ****************************************************************************/ + +/*** file scope macro definitions ****************************************************************/ + +/*** file scope type declarations ****************************************************************/ + +/*** file scope variables ************************************************************************/ + +/* --------------------------------------------------------------------------------------------- */ +/*** file scope functions ************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +static void +mcview_remove_ext_script (WView * view) +{ + if (view->ext_script != NULL) + { + mc_unlink (view->ext_script); + vfs_path_free (view->ext_script, TRUE); + view->ext_script = NULL; + } +} + +/* --------------------------------------------------------------------------------------------- */ + +/* Both views */ +static void +mcview_search (WView * view, gboolean start_search) +{ + off_t want_search_start = view->search_start; + + if (start_search) + { + if (mcview_dialog_search (view)) + { + if (view->mode_flags.hex) + want_search_start = view->hex_cursor; + + mcview_do_search (view, want_search_start); + } + } + else + { + if (view->mode_flags.hex) + { + if (!mcview_search_options.backwards) + want_search_start = view->hex_cursor + 1; + else if (view->hex_cursor > 0) + want_search_start = view->hex_cursor - 1; + else + want_search_start = 0; + } + + mcview_do_search (view, want_search_start); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +mcview_continue_search_cmd (WView * view) +{ + if (view->last_search_string != NULL) + mcview_search (view, FALSE); + else + { + /* find last search string in history */ + GList *history; + + history = mc_config_history_get (MC_HISTORY_SHARED_SEARCH); + if (history != NULL) + { + /* FIXME: is it possible that history->data == NULL? */ + view->last_search_string = (gchar *) history->data; + history->data = NULL; + history = g_list_first (history); + g_list_free_full (history, g_free); + + if (mcview_search_init (view)) + { + mcview_search (view, FALSE); + return; + } + + /* found, but cannot init search */ + MC_PTR_FREE (view->last_search_string); + } + + /* if not... then ask for an expression */ + mcview_search (view, TRUE); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +mcview_hook (void *v) +{ + WView *view = (WView *) v; + WPanel *panel; + + /* If the user is busy typing, wait until he finishes to update the + screen */ + if (!is_idle ()) + { + if (!hook_present (idle_hook, mcview_hook)) + add_hook (&idle_hook, mcview_hook, v); + return; + } + + delete_hook (&idle_hook, mcview_hook); + + if (get_current_type () == view_listing) + panel = current_panel; + else if (get_other_type () == view_listing) + panel = other_panel; + else + return; + + mcview_done (view); + mcview_init (view); + mcview_load (view, 0, panel->dir.list[panel->selected].fname->str, 0, 0, 0); + mcview_display (view); +} + +/* --------------------------------------------------------------------------------------------- */ + +static cb_ret_t +mcview_handle_editkey (WView * view, int key) +{ + struct hexedit_change_node *node; + int byte_val = -1; + + /* Has there been a change at this position? */ + node = view->change_list; + while ((node != NULL) && (node->offset != view->hex_cursor)) + node = node->next; + + if (!view->hexview_in_text) + { + /* Hex editing */ + unsigned int hexvalue = 0; + + if (key >= '0' && key <= '9') + hexvalue = 0 + (key - '0'); + else if (key >= 'A' && key <= 'F') + hexvalue = 10 + (key - 'A'); + else if (key >= 'a' && key <= 'f') + hexvalue = 10 + (key - 'a'); + else + return MSG_NOT_HANDLED; + + if (node != NULL) + byte_val = node->value; + else + mcview_get_byte (view, view->hex_cursor, &byte_val); + + if (view->hexedit_lownibble) + byte_val = (byte_val & 0xf0) | (hexvalue); + else + byte_val = (byte_val & 0x0f) | (hexvalue << 4); + } + else + { + /* Text editing */ + if (key < 256 && key != '\t') + byte_val = key; + else + return MSG_NOT_HANDLED; + } + + if ((view->filename_vpath != NULL) + && (*(vfs_path_get_last_path_str (view->filename_vpath)) != '\0') + && (view->change_list == NULL)) + view->locked = lock_file (view->filename_vpath); + + if (node == NULL) + { + node = g_new (struct hexedit_change_node, 1); + node->offset = view->hex_cursor; + node->value = byte_val; + mcview_enqueue_change (&view->change_list, node); + } + else + node->value = byte_val; + + view->dirty++; + mcview_move_right (view, 1); + + return MSG_HANDLED; +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +mcview_load_next_prev_init (WView * view) +{ + if (mc_global.mc_run_mode != MC_RUN_VIEWER) + { + /* get file list from current panel. Update it each time */ + view->dir = ¤t_panel->dir; + view->dir_idx = ¤t_panel->selected; + } + else if (view->dir == NULL) + { + /* Run from command line */ + /* Run 1st time. Load/get directory */ + + /* TODO: check mtime of directory to reload it */ + + dir_sort_options_t sort_op = { FALSE, TRUE, FALSE }; + + /* load directory where requested file is */ + view->dir = g_new0 (dir_list, 1); + view->dir_idx = g_new (int, 1); + + if (dir_list_load + (view->dir, view->workdir_vpath, (GCompareFunc) sort_name, &sort_op, NULL)) + { + const char *fname; + size_t fname_len; + int i; + + fname = x_basename (vfs_path_as_str (view->filename_vpath)); + fname_len = strlen (fname); + + /* search current file in the list */ + for (i = 0; i != view->dir->len; i++) + { + const file_entry_t *fe = &view->dir->list[i]; + + if (fname_len == fe->fname->len && strncmp (fname, fe->fname->str, fname_len) == 0) + break; + } + + *view->dir_idx = i; + } + else + { + message (D_ERROR, MSG_ERROR, _("Cannot read directory contents")); + MC_PTR_FREE (view->dir); + MC_PTR_FREE (view->dir_idx); + } + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +mcview_scan_for_file (WView * view, int direction) +{ + int i; + + for (i = *view->dir_idx + direction; i != *view->dir_idx; i += direction) + { + if (i < 0) + i = view->dir->len - 1; + if (i == view->dir->len) + i = 0; + if (!S_ISDIR (view->dir->list[i].st.st_mode)) + break; + } + + *view->dir_idx = i; +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +mcview_load_next_prev (WView * view, int direction) +{ + dir_list *dir; + int *dir_idx; + vfs_path_t *vfile; + vfs_path_t *ext_script = NULL; + + mcview_load_next_prev_init (view); + mcview_scan_for_file (view, direction); + + /* reinit view */ + dir = view->dir; + dir_idx = view->dir_idx; + view->dir = NULL; + view->dir_idx = NULL; + vfile = + vfs_path_append_new (view->workdir_vpath, dir->list[*dir_idx].fname->str, (char *) NULL); + mcview_done (view); + mcview_remove_ext_script (view); + mcview_init (view); + if (regex_command_for (view, vfile, "View", &ext_script) == 0) + mcview_load (view, NULL, vfs_path_as_str (vfile), 0, 0, 0); + vfs_path_free (vfile, TRUE); + view->dir = dir; + view->dir_idx = dir_idx; + view->ext_script = ext_script; + + view->dpy_bbar_dirty = FALSE; /* FIXME */ + view->dirty++; +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +mcview_load_file_from_history (WView * view) +{ + char *filename; + int action; + + filename = show_file_history (CONST_WIDGET (view), &action); + + if (filename != NULL && (action == CK_View || action == CK_Enter)) + { + mcview_done (view); + mcview_init (view); + + mcview_load (view, NULL, filename, 0, 0, 0); + + view->dpy_bbar_dirty = FALSE; /* FIXME */ + view->dirty++; + } + + g_free (filename); +} + +/* --------------------------------------------------------------------------------------------- */ + +static cb_ret_t +mcview_execute_cmd (WView * view, long command) +{ + int res = MSG_HANDLED; + + switch (command) + { + case CK_Help: + { + ev_help_t event_data = { NULL, "[Internal File Viewer]" }; + mc_event_raise (MCEVENT_GROUP_CORE, "help", &event_data); + } + break; + case CK_HexMode: + /* Toggle between hex view and text view */ + mcview_toggle_hex_mode (view); + break; + case CK_HexEditMode: + /* Toggle between hexview and hexedit mode */ + mcview_toggle_hexedit_mode (view); + break; + case CK_ToggleNavigation: + view->hexview_in_text = !view->hexview_in_text; + view->dirty++; + break; + case CK_LeftQuick: + if (!view->mode_flags.hex) + mcview_move_left (view, 10); + break; + case CK_RightQuick: + if (!view->mode_flags.hex) + mcview_move_right (view, 10); + break; + case CK_Goto: + { + off_t addr; + + if (mcview_dialog_goto (view, &addr)) + { + if (addr >= 0) + mcview_moveto_offset (view, addr); + else + { + message (D_ERROR, _("Warning"), "%s", _("Invalid value")); + view->dirty++; + } + } + break; + } + case CK_Save: + mcview_hexedit_save_changes (view); + break; + case CK_Search: + mcview_search (view, TRUE); + break; + case CK_SearchContinue: + mcview_continue_search_cmd (view); + break; + case CK_SearchForward: + mcview_search_options.backwards = FALSE; + mcview_search (view, TRUE); + break; + case CK_SearchForwardContinue: + mcview_search_options.backwards = FALSE; + mcview_continue_search_cmd (view); + break; + case CK_SearchBackward: + mcview_search_options.backwards = TRUE; + mcview_search (view, TRUE); + break; + case CK_SearchBackwardContinue: + mcview_search_options.backwards = TRUE; + mcview_continue_search_cmd (view); + break; + case CK_SearchOppositeContinue: + { + gboolean direction; + + direction = mcview_search_options.backwards; + mcview_search_options.backwards = !direction; + mcview_continue_search_cmd (view); + mcview_search_options.backwards = direction; + } + break; + case CK_WrapMode: + /* Toggle between wrapped and unwrapped view */ + mcview_toggle_wrap_mode (view); + break; + case CK_MagicMode: + mcview_toggle_magic_mode (view); + break; + case CK_NroffMode: + mcview_toggle_nroff_mode (view); + break; + case CK_Home: + mcview_moveto_bol (view); + break; + case CK_End: + mcview_moveto_eol (view); + break; + case CK_Left: + mcview_move_left (view, 1); + break; + case CK_Right: + mcview_move_right (view, 1); + break; + case CK_Up: + mcview_move_up (view, 1); + break; + case CK_Down: + mcview_move_down (view, 1); + break; + case CK_HalfPageUp: + mcview_move_up (view, (view->data_area.lines + 1) / 2); + break; + case CK_HalfPageDown: + mcview_move_down (view, (view->data_area.lines + 1) / 2); + break; + case CK_PageUp: + mcview_move_up (view, view->data_area.lines); + break; + case CK_PageDown: + mcview_move_down (view, view->data_area.lines); + break; + case CK_Top: + mcview_moveto_top (view); + break; + case CK_Bottom: + mcview_moveto_bottom (view); + break; + case CK_Shell: + toggle_subshell (); + break; + case CK_Ruler: + mcview_display_toggle_ruler (view); + break; + case CK_Bookmark: + view->dpy_start = view->marks[view->marker]; + view->dpy_paragraph_skip_lines = 0; /* TODO: remember this value in the marker? */ + view->dpy_wrap_dirty = TRUE; + view->dirty++; + break; + case CK_BookmarkGoto: + view->marks[view->marker] = view->dpy_start; + break; +#ifdef HAVE_CHARSET + case CK_SelectCodepage: + mcview_select_encoding (view); + view->dirty++; + break; +#endif + case CK_FileNext: + case CK_FilePrev: + /* Does not work in panel mode */ + if (!mcview_is_in_panel (view)) + mcview_load_next_prev (view, command == CK_FileNext ? 1 : -1); + break; + case CK_History: + mcview_load_file_from_history (view); + break; + case CK_Quit: + if (!mcview_is_in_panel (view)) + dlg_stop (DIALOG (WIDGET (view)->owner)); + break; + case CK_Cancel: + /* don't close viewer due to SIGINT */ + break; + default: + res = MSG_NOT_HANDLED; + } + return res; +} + +/* --------------------------------------------------------------------------------------------- */ + +static long +mcview_lookup_key (WView * view, int key) +{ + if (view->mode_flags.hex) + return keybind_lookup_keymap_command (view->hex_keymap, key); + + return widget_lookup_key (WIDGET (view), key); +} + +/* --------------------------------------------------------------------------------------------- */ +/** Both views */ +static cb_ret_t +mcview_handle_key (WView * view, int key) +{ + long command; + +#ifdef HAVE_CHARSET + key = convert_from_input_c (key); +#endif + + if (view->hexedit_mode && view->mode_flags.hex + && mcview_handle_editkey (view, key) == MSG_HANDLED) + return MSG_HANDLED; + + command = mcview_lookup_key (view, key); + if (command != CK_IgnoreKey && mcview_execute_cmd (view, command) == MSG_HANDLED) + return MSG_HANDLED; + +#ifdef MC_ENABLE_DEBUGGING_CODE + if (key == 't') + { /* mnemonic: "test" */ + mcview_ccache_dump (view); + return MSG_HANDLED; + } +#endif + if (key >= '0' && key <= '9') + view->marker = key - '0'; + + /* Key not used */ + return MSG_NOT_HANDLED; +} + + +/* --------------------------------------------------------------------------------------------- */ + +static inline void +mcview_resize (WView * view) +{ + view->dpy_wrap_dirty = TRUE; + mcview_compute_areas (view); + mcview_update_bytes_per_line (view); +} + +/* --------------------------------------------------------------------------------------------- */ + +static gboolean +mcview_ok_to_quit (WView * view) +{ + int r; + + if (view->change_list == NULL) + return TRUE; + + if (!mc_global.midnight_shutdown) + { + query_set_sel (2); + r = query_dialog (_("Quit"), + _("File was modified. Save with exit?"), D_NORMAL, 3, + _("&Yes"), _("&No"), _("&Cancel quit")); + } + else + { + r = query_dialog (_("Quit"), + _("Midnight Commander is being shut down.\nSave modified file?"), + D_NORMAL, 2, _("&Yes"), _("&No")); + /* Esc is No */ + if (r == -1) + r = 1; + } + + switch (r) + { + case 0: /* Yes */ + return mcview_hexedit_save_changes (view) || mc_global.midnight_shutdown; + case 1: /* No */ + mcview_hexedit_free_change_list (view); + return TRUE; + default: + return FALSE; + } +} + +/* --------------------------------------------------------------------------------------------- */ +/*** public functions ****************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +cb_ret_t +mcview_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data) +{ + WView *view = (WView *) w; + cb_ret_t i; + + mcview_compute_areas (view); + mcview_update_bytes_per_line (view); + + switch (msg) + { + case MSG_INIT: + if (mcview_is_in_panel (view)) + add_hook (&select_file_hook, mcview_hook, view); + else + view->dpy_bbar_dirty = TRUE; + return MSG_HANDLED; + + case MSG_DRAW: + mcview_display (view); + return MSG_HANDLED; + + case MSG_CURSOR: + if (view->mode_flags.hex) + mcview_place_cursor (view); + return MSG_HANDLED; + + case MSG_KEY: + i = mcview_handle_key (view, parm); + mcview_update (view); + return i; + + case MSG_ACTION: + i = mcview_execute_cmd (view, parm); + mcview_update (view); + return i; + + case MSG_FOCUS: + view->dpy_bbar_dirty = TRUE; + /* TODO: get rid of draw here before MSG_DRAW */ + mcview_update (view); + return MSG_HANDLED; + + case MSG_RESIZE: + widget_default_callback (w, NULL, MSG_RESIZE, 0, data); + mcview_resize (view); + return MSG_HANDLED; + + case MSG_DESTROY: + if (mcview_is_in_panel (view)) + { + delete_hook (&select_file_hook, mcview_hook); + + /* + * In some cases when mc startup is very slow and one panel is in quick vew mode, + * @view is registered in two hook lists at the same time: + * mcview_callback (MSG_INIT) -> add_hook (&select_file_hook) + * mcview_hook () -> add_hook (&idle_hook). + * If initialization of file manager is not completed yet, but user switches + * panel mode from qick view to another one (by pressing C-x q), the following + * occurs: + * view hook is deleted from select_file_hook list via following call chain: + * create_panel (view_listing) -> widget_replace () -> + * send_message (MSG_DESTROY) -> mcview_callback (MSG_DESTROY) -> + * delete_hook (&select_file_hook); + * @view object is free'd: + * create_panel (view_listing) -> g_free (old_widget); + * but @view still is in idle_hook list and tried to be executed: + * frontend_dlg_run () -> execute_hooks (idle_hook). + * Thus here we have access to free'd @view object. To prevent this, remove view hook + * from idle_hook list. + */ + delete_hook (&idle_hook, mcview_hook); + + if (mc_global.midnight_shutdown) + mcview_ok_to_quit (view); + } + mcview_done (view); + mcview_remove_ext_script (view); + return MSG_HANDLED; + + default: + return widget_default_callback (w, sender, msg, parm, data); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +cb_ret_t +mcview_dialog_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data) +{ + WDialog *h = DIALOG (w); + WView *view; + + switch (msg) + { + case MSG_ACTION: + /* Handle shortcuts. */ + + /* Note: the buttonbar sends messages directly to the the WView, not to + * here, which is why we can pass NULL in the following call. */ + return mcview_execute_cmd (NULL, parm); + + case MSG_VALIDATE: + view = (WView *) widget_find_by_type (w, mcview_callback); + /* don't stop the dialog before final decision */ + widget_set_state (w, WST_ACTIVE, TRUE); + if (mcview_ok_to_quit (view)) + dlg_stop (h); + else + mcview_update (view); + return MSG_HANDLED; + + default: + return dlg_default_callback (w, sender, msg, parm, data); + } +} + +/* --------------------------------------------------------------------------------------------- */ |