src/editor/editwidget.c

   1 /* editor initialisation and callback handler.
   2
   3    Copyright (C) 1996, 1997, 1998, 2001, 2002, 2003, 2004, 2005, 2006,
   4    2007 Free Software Foundation, Inc.
   5
   6    Authors: 1996, 1997 Paul Sheer
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21    02110-1301, USA.
  22  */
  23
  24 /** \file
  25  *  \brief Source: editor initialisation and callback handler
  26  *  \author Paul Sheer
  27  *  \date 1996, 1997
  28  */
  29
  30 #include <config.h>
  31
  32 #include <stdio.h>
  33 #include <stdarg.h>
  34 #include <sys/types.h>
  35 #include <unistd.h>
  36 #include <string.h>
  37 #include <ctype.h>
  38 #include <errno.h>
  39 #include <sys/stat.h>
  40 #include <stdlib.h>
  41
  42 #include "lib/global.h"
  43
  44 #include "lib/tty/tty.h"                /* LINES, COLS */
  45 #include "lib/tty/key.h"                /* is_idle() */
  46
  47 #include "edit-impl.h"
  48 #include "edit-widget.h"
  49
  50 #include "src/dialog.h"
  51 #include "src/widget.h"         /* ButtonBar */
  52 #include "src/menu.h"           /* menubar_new() */
  53 #include "src/cmddef.h"
  54
  55 WEdit *wedit;
  56 struct WMenuBar *edit_menubar;
  57
  58 int column_highlighting = 0;
  59
  60 static cb_ret_t edit_callback (Widget *, widget_msg_t msg, int parm);
  61
  62 static char *
  63 edit_get_shortcut (unsigned long command)
  64 {
  65     const char *ext_map;
  66     const char *shortcut = NULL;
  67
  68     shortcut = lookup_keymap_shortcut (editor_map, command);
  69     if (shortcut != NULL)
  70         return g_strdup (shortcut);
  71
  72     ext_map = lookup_keymap_shortcut (editor_map, CK_Ext_Mode);
  73     if (ext_map != NULL)
  74         shortcut = lookup_keymap_shortcut (editor_x_map, command);
  75     if (shortcut != NULL)
  76         return g_strdup_printf ("%s %s", ext_map, shortcut);
  77
  78     return NULL;
  79 }
  80
  81 static int
  82 edit_event (Gpm_Event *event, void *data)
  83 {
  84     WEdit *edit = (WEdit *) data;
  85
  86     /* Unknown event type */
  87     if (!(event->type & (GPM_DOWN | GPM_DRAG | GPM_UP)))
  88         return MOU_NORMAL;
  89
  90     /* rest of the upper frame, the menu is invisible - call menu */
  91     if ((event->type & GPM_DOWN) && (event->y == 1))
  92         return edit_menubar->widget.mouse (event, edit_menubar);
  93
  94     edit_update_curs_row (edit);
  95     edit_update_curs_col (edit);
  96
  97     /* Outside editor window */
  98     if (event->y <= 1 || event->x <= 0
  99         || event->x > edit->num_widget_columns
 100         || event->y > edit->num_widget_lines + 1)
 101         return MOU_NORMAL;
 102
 103     /* Wheel events */
 104     if ((event->buttons & GPM_B_UP) && (event->type & GPM_DOWN)) {
 105         edit_move_up (edit, 2, 1);
 106         goto update;
 107     }
 108     if ((event->buttons & GPM_B_DOWN) && (event->type & GPM_DOWN)) {
 109         edit_move_down (edit, 2, 1);
 110         goto update;
 111     }
 112
 113     /* A lone up mustn't do anything */
 114     if (edit->mark2 != -1 && event->type & (GPM_UP | GPM_DRAG))
 115         return MOU_NORMAL;
 116
 117     if (event->type & (GPM_DOWN | GPM_UP))
 118         edit_push_key_press (edit);
 119
 120     if (option_cursor_beyond_eol) {
 121         long line_len = edit_move_forward3 (edit, edit_bol (edit, edit->curs1), 0,
 122                                             edit_eol(edit, edit->curs1));
 123
 124         if ( event->x > line_len ) {
 125             edit->over_col = event->x - line_len - edit->start_col - option_line_state_width - 1;
 126             edit->prev_col = line_len;
 127         } else {
 128             edit->over_col = 0;
 129             edit->prev_col = event->x - option_line_state_width - edit->start_col - 1;
 130         }
 131     } else {
 132         edit->prev_col = event->x - edit->start_col - option_line_state_width - 1;
 133     }
 134
 135     if (--event->y > (edit->curs_row + 1))
 136         edit_move_down (edit, event->y - (edit->curs_row + 1), 0);
 137     else if (event->y < (edit->curs_row + 1))
 138         edit_move_up (edit, (edit->curs_row + 1) - event->y, 0);
 139     else
 140         edit_move_to_prev_col (edit, edit_bol (edit, edit->curs1));
 141
 142     if (event->type & GPM_DOWN) {
 143         edit_mark_cmd (edit, 1);        /* reset */
 144         edit->highlight = 0;
 145     }
 146
 147     if (!(event->type & GPM_DRAG))
 148         edit_mark_cmd (edit, 0);
 149
 150   update:
 151     edit_find_bracket (edit);
 152     edit->force |= REDRAW_COMPLETELY;
 153     edit_update_curs_row (edit);
 154     edit_update_curs_col (edit);
 155     edit_update_screen (edit);
 156
 157     return MOU_NORMAL;
 158 }
 159
 160 static cb_ret_t
 161 edit_command_execute (WEdit *edit, unsigned long command)
 162 {
 163     if (command == CK_Menu)
 164         edit_menu_cmd (edit);
 165     else {
 166         edit_execute_key_command (edit, command, -1);
 167         edit_update_screen (edit);
 168     }
 169     return MSG_HANDLED;
 170 }
 171
 172 static inline void
 173 edit_set_buttonbar (WEdit *edit, WButtonBar *bb)
 174 {
 175     buttonbar_set_label (bb,  1, Q_("ButtonBar|Help"),   editor_map, (Widget *) edit);
 176     buttonbar_set_label (bb,  2, Q_("ButtonBar|Save"),   editor_map, (Widget *) edit);
 177     buttonbar_set_label (bb,  3, Q_("ButtonBar|Mark"),   editor_map, (Widget *) edit);
 178     buttonbar_set_label (bb,  4, Q_("ButtonBar|Replac"), editor_map, (Widget *) edit);
 179     buttonbar_set_label (bb,  5, Q_("ButtonBar|Copy"),   editor_map, (Widget *) edit);
 180     buttonbar_set_label (bb,  6, Q_("ButtonBar|Move"),   editor_map, (Widget *) edit);
 181     buttonbar_set_label (bb,  7, Q_("ButtonBar|Search"), editor_map, (Widget *) edit);
 182     buttonbar_set_label (bb,  8, Q_("ButtonBar|Delete"), editor_map, (Widget *) edit);
 183     buttonbar_set_label (bb,  9, Q_("ButtonBar|PullDn"), editor_map, (Widget *) edit);
 184     buttonbar_set_label (bb, 10, Q_("ButtonBar|Quit"),   editor_map, (Widget *) edit);
 185 }
 186
 187 /* Callback for the edit dialog */
 188 static cb_ret_t
 189 edit_dialog_callback (Dlg_head *h, Widget *sender,
 190                         dlg_msg_t msg, int parm, void *data)
 191 {
 192     WEdit *edit;
 193     WMenuBar *menubar;
 194     WButtonBar *buttonbar;
 195
 196     edit = (WEdit *) find_widget_type (h, edit_callback);
 197     menubar = find_menubar (h);
 198     buttonbar = find_buttonbar (h);
 199
 200     switch (msg) {
 201     case DLG_INIT:
 202         edit_set_buttonbar (edit, buttonbar);
 203         return MSG_HANDLED;
 204
 205     case DLG_RESIZE:
 206         widget_set_size (&edit->widget, 0, 0, LINES - 1, COLS);
 207         widget_set_size (&buttonbar->widget , LINES - 1, 0, 1, COLS);
 208         widget_set_size (&menubar->widget, 0, 0, 1, COLS);
 209         menubar_arrange (menubar);
 210         return MSG_HANDLED;
 211
 212     case DLG_ACTION:
 213         if (sender == (Widget *) menubar)
 214             return send_message ((Widget *) edit, WIDGET_COMMAND, parm);
 215         if (sender == (Widget *) buttonbar)
 216             return send_message ((Widget *) edit, WIDGET_COMMAND, parm);
 217         return MSG_HANDLED;
 218
 219     case DLG_VALIDATE:
 220         if (!edit_ok_to_exit (edit))
 221             h->running = 1;
 222         return MSG_HANDLED;
 223
 224     default:
 225         return default_dlg_callback (h, sender, msg, parm, data);
 226     }
 227 }
 228
 229 int
 230 edit_file (const char *_file, int line)
 231 {
 232     static gboolean made_directory = FALSE;
 233     Dlg_head *edit_dlg;
 234
 235     if (!made_directory) {
 236         char *dir = concat_dir_and_file (home_dir, EDIT_DIR);
 237         made_directory = (mkdir (dir, 0700) != -1 || errno == EEXIST);
 238         g_free (dir);
 239     }
 240
 241     wedit = edit_init (NULL, LINES - 2, COLS, _file, line);
 242
 243     if (wedit == NULL)
 244         return 0;
 245
 246     /* Create a new dialog and add it widgets to it */
 247     edit_dlg =
 248         create_dlg (0, 0, LINES, COLS, NULL, edit_dialog_callback,
 249                     "[Internal File Editor]", NULL, DLG_WANT_TAB);
 250
 251     edit_dlg->get_shortcut = edit_get_shortcut;
 252     edit_menubar = menubar_new (0, 0, COLS, NULL);
 253     add_widget (edit_dlg, edit_menubar);
 254     edit_init_menu (edit_menubar);
 255
 256     init_widget (&(wedit->widget), 0, 0, LINES - 1, COLS,
 257                  edit_callback, edit_event);
 258     widget_want_cursor (wedit->widget, 1);
 259
 260     add_widget (edit_dlg, wedit);
 261
 262     add_widget (edit_dlg, buttonbar_new (TRUE));
 263
 264     run_dlg (edit_dlg);
 265
 266     destroy_dlg (edit_dlg);
 267
 268     return 1;
 269 }
 270
 271 const char *
 272 edit_get_file_name (const WEdit *edit)
 273 {
 274     return edit->filename;
 275 }
 276
 277 void
 278 edit_update_screen (WEdit * e)
 279 {
 280     edit_scroll_screen_over_cursor (e);
 281
 282     edit_update_curs_col (e);
 283     edit_status (e);
 284
 285     /* pop all events for this window for internal handling */
 286     if (!is_idle ())
 287         e->force |= REDRAW_PAGE;
 288     else {
 289         if (e->force & REDRAW_COMPLETELY)
 290             e->force |= REDRAW_PAGE;
 291         edit_render_keypress (e);
 292     }
 293 }
 294
 295 static cb_ret_t
 296 edit_callback (Widget *w, widget_msg_t msg, int parm)
 297 {
 298     WEdit *e = (WEdit *) w;
 299
 300     switch (msg) {
 301     case WIDGET_DRAW:
 302         e->force |= REDRAW_COMPLETELY;
 303         e->num_widget_lines = LINES - 2;
 304         e->num_widget_columns = COLS;
 305         /* fallthrough */
 306
 307     case WIDGET_FOCUS:
 308         edit_update_screen (e);
 309         return MSG_HANDLED;
 310
 311     case WIDGET_KEY:
 312         {
 313             int cmd, ch;
 314             cb_ret_t ret = MSG_NOT_HANDLED;
 315
 316             /* The user may override the access-keys for the menu bar. */
 317             if (edit_translate_key (e, parm, &cmd, &ch)) {
 318                 edit_execute_key_command (e, cmd, ch);
 319                 edit_update_screen (e);
 320                 ret = MSG_HANDLED;
 321             } else  if (edit_drop_hotkey_menu (e, parm))
 322                 ret =  MSG_HANDLED;
 323
 324             return ret;
 325         }
 326
 327     case WIDGET_COMMAND:
 328         /* command from menubar or buttonbar */
 329         return edit_command_execute (e, parm);
 330
 331     case WIDGET_CURSOR:
 332         widget_move (&e->widget, e->curs_row + EDIT_TEXT_VERTICAL_OFFSET,
 333                      e->curs_col + e->start_col + e->over_col +
 334                      EDIT_TEXT_HORIZONTAL_OFFSET + option_line_state_width);
 335         return MSG_HANDLED;
 336
 337     case WIDGET_DESTROY:
 338         edit_clean (e);
 339         return MSG_HANDLED;
 340
 341     default:
 342         return default_proc (msg, parm);
 343     }
 344 }