edit/editwidget.c

   1 /* editor initialisation and callback handler.
   2
   3    Copyright (C) 1996, 1997 the Free Software Foundation
   4
   5    Authors: 1996, 1997 Paul Sheer
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307, USA.
  21  */
  22
  23 #include <config.h>
  24 #include "edit.h"
  25 #include "edit-widget.h"
  26
  27 #include "../src/tty.h"         /* LINES */
  28 #include "../src/widget.h"      /* redraw_labels() */
  29 #include "../src/menu.h"        /* menubar_new() */
  30 #include "../src/key.h"         /* is_idle() */
  31
  32 WEdit *wedit;
  33 struct WMenu *edit_menubar;
  34
  35 int column_highlighting = 0;
  36
  37 static cb_ret_t edit_callback (WEdit *edit, widget_msg_t msg, int parm);
  38
  39 static int
  40 edit_event (WEdit * edit, Gpm_Event * event, int *result)
  41 {
  42     *result = MOU_NORMAL;
  43     edit_update_curs_row (edit);
  44     edit_update_curs_col (edit);
  45
  46     /* Unknown event type */
  47     if (!(event->type & (GPM_DOWN | GPM_DRAG | GPM_UP)))
  48         return 0;
  49
  50     /* Wheel events */
  51     if ((event->buttons & GPM_B_UP) && (event->type & GPM_DOWN)) {
  52         edit_move_up (edit, 2, 1);
  53         goto update;
  54     }
  55     if ((event->buttons & GPM_B_DOWN) && (event->type & GPM_DOWN)) {
  56         edit_move_down (edit, 2, 1);
  57         goto update;
  58     }
  59
  60     /* Outside editor window */
  61     if (event->y <= 1 || event->x <= 0
  62         || event->x > edit->num_widget_columns
  63         || event->y > edit->num_widget_lines + 1)
  64         return 0;
  65
  66     /* A lone up mustn't do anything */
  67     if (edit->mark2 != -1 && event->type & (GPM_UP | GPM_DRAG))
  68         return 1;
  69
  70     if (event->type & (GPM_DOWN | GPM_UP))
  71         edit_push_key_press (edit);
  72
  73     edit_cursor_move (edit, edit_bol (edit, edit->curs1) - edit->curs1);
  74
  75     if (--event->y > (edit->curs_row + 1))
  76         edit_cursor_move (edit,
  77                           edit_move_forward (edit, edit->curs1,
  78                                              event->y - (edit->curs_row +
  79                                                          1), 0)
  80                           - edit->curs1);
  81
  82     if (event->y < (edit->curs_row + 1))
  83         edit_cursor_move (edit,
  84                           edit_move_backward (edit, edit->curs1,
  85                                               (edit->curs_row + 1) -
  86                                               event->y) - edit->curs1);
  87
  88     edit_cursor_move (edit,
  89                       (int) edit_move_forward3 (edit, edit->curs1,
  90                                                 event->x -
  91                                                 edit->start_col - 1,
  92                                                 0) - edit->curs1);
  93
  94     edit->prev_col = edit_get_col (edit);
  95
  96     if (event->type & GPM_DOWN) {
  97         edit_mark_cmd (edit, 1);        /* reset */
  98         edit->highlight = 0;
  99     }
 100
 101     if (!(event->type & GPM_DRAG))
 102         edit_mark_cmd (edit, 0);
 103
 104   update:
 105     edit->force |= REDRAW_COMPLETELY;
 106     edit_update_curs_row (edit);
 107     edit_update_curs_col (edit);
 108     edit_update_screen (edit);
 109
 110     return 1;
 111 }
 112
 113
 114 static int
 115 edit_mouse_event (Gpm_Event *event, void *x)
 116 {
 117     int result;
 118     if (edit_event ((WEdit *) x, event, &result))
 119         return result;
 120     else
 121         return (*edit_menubar->widget.mouse) (event, edit_menubar);
 122 }
 123
 124 static void
 125 edit_adjust_size (Dlg_head *h)
 126 {
 127     WEdit *edit;
 128     WButtonBar *edit_bar;
 129
 130     edit = (WEdit *) find_widget_type (h, edit_callback);
 131     edit_bar = find_buttonbar (h);
 132
 133     widget_set_size (&edit->widget, 0, 0, LINES - 1, COLS);
 134     widget_set_size (&edit_bar->widget, LINES - 1, 0, 1, COLS);
 135     widget_set_size (&edit_menubar->widget, 0, 0, 1, COLS);
 136
 137 #ifdef RESIZABLE_MENUBAR
 138     menubar_arrange (edit_menubar);
 139 #endif
 140 }
 141
 142 /* Callback for the edit dialog */
 143 static cb_ret_t
 144 edit_dialog_callback (Dlg_head *h, dlg_msg_t msg, int parm)
 145 {
 146     WEdit *edit;
 147
 148     switch (msg) {
 149     case DLG_RESIZE:
 150         edit_adjust_size (h);
 151         return MSG_HANDLED;
 152
 153     case DLG_VALIDATE:
 154         edit = (WEdit *) find_widget_type (h, edit_callback);
 155         if (!edit_ok_to_exit (edit)) {
 156             h->running = 1;
 157         }
 158         return MSG_HANDLED;
 159
 160     default:
 161         return default_dlg_callback (h, msg, parm);
 162     }
 163 }
 164
 165 int
 166 edit (const char *_file, int line)
 167 {
 168     static int made_directory = 0;
 169     Dlg_head *edit_dlg;
 170     WButtonBar *edit_bar;
 171
 172     if (option_backup_ext_int != -1) {
 173         option_backup_ext = g_malloc (sizeof (int) + 1);
 174         option_backup_ext[sizeof (int)] = '\0';
 175         memcpy (option_backup_ext, (char *) &option_backup_ext_int,
 176                 sizeof (int));
 177     }
 178     if (!made_directory) {
 179         mkdir (catstrs (home_dir, EDIT_DIR, 0), 0700);
 180         made_directory = 1;
 181     }
 182
 183     if (!(wedit = edit_init (NULL, LINES - 2, COLS, _file, line))) {
 184         return 0;
 185     }
 186
 187     /* Create a new dialog and add it widgets to it */
 188     edit_dlg =
 189         create_dlg (0, 0, LINES, COLS, NULL, edit_dialog_callback,
 190                     "[Internal File Editor]", NULL, DLG_WANT_TAB);
 191
 192     init_widget (&(wedit->widget), 0, 0, LINES - 1, COLS,
 193                  (callback_fn) edit_callback,
 194                  (mouse_h) edit_mouse_event);
 195
 196     widget_want_cursor (wedit->widget, 1);
 197
 198     edit_bar = buttonbar_new (1);
 199
 200     switch (edit_key_emulation) {
 201     case EDIT_KEY_EMULATION_NORMAL:
 202         edit_init_menu_normal ();       /* editmenu.c */
 203         break;
 204     case EDIT_KEY_EMULATION_EMACS:
 205         edit_init_menu_emacs ();        /* editmenu.c */
 206         break;
 207     }
 208     edit_menubar = menubar_new (0, 0, COLS, EditMenuBar, N_menus);
 209
 210     add_widget (edit_dlg, edit_bar);
 211     add_widget (edit_dlg, wedit);
 212     add_widget (edit_dlg, edit_menubar);
 213
 214     run_dlg (edit_dlg);
 215
 216     edit_done_menu ();          /* editmenu.c */
 217
 218     destroy_dlg (edit_dlg);
 219
 220     return 1;
 221 }
 222
 223 static void edit_my_define (Dlg_head * h, int idx, char *text,
 224                             void (*fn) (WEdit *), WEdit * edit)
 225 {
 226     define_label_data (h, idx, text, (buttonbarfn) fn, edit);
 227 }
 228
 229
 230 static void cmd_F1 (WEdit * edit)
 231 {
 232     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (1));
 233 }
 234
 235 static void cmd_F2 (WEdit * edit)
 236 {
 237     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (2));
 238 }
 239
 240 static void cmd_F3 (WEdit * edit)
 241 {
 242     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (3));
 243 }
 244
 245 static void cmd_F4 (WEdit * edit)
 246 {
 247     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (4));
 248 }
 249
 250 static void cmd_F5 (WEdit * edit)
 251 {
 252     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (5));
 253 }
 254
 255 static void cmd_F6 (WEdit * edit)
 256 {
 257     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (6));
 258 }
 259
 260 static void cmd_F7 (WEdit * edit)
 261 {
 262     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (7));
 263 }
 264
 265 static void cmd_F8 (WEdit * edit)
 266 {
 267     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (8));
 268 }
 269
 270 #if 0
 271 static void cmd_F9 (WEdit * edit)
 272 {
 273     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (9));
 274 }
 275 #endif
 276
 277 static void cmd_F10 (WEdit * edit)
 278 {
 279     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (10));
 280 }
 281
 282 static void
 283 edit_labels (WEdit *edit)
 284 {
 285     Dlg_head *h = edit->widget.parent;
 286
 287     edit_my_define (h, 1, _("Help"), cmd_F1, edit);
 288     edit_my_define (h, 2, _("Save"), cmd_F2, edit);
 289     edit_my_define (h, 3, _("Mark"), cmd_F3, edit);
 290     edit_my_define (h, 4, _("Replac"), cmd_F4, edit);
 291     edit_my_define (h, 5, _("Copy"), cmd_F5, edit);
 292     edit_my_define (h, 6, _("Move"), cmd_F6, edit);
 293     edit_my_define (h, 7, _("Search"), cmd_F7, edit);
 294     edit_my_define (h, 8, _("Delete"), cmd_F8, edit);
 295     edit_my_define (h, 9, _("PullDn"), edit_menu_cmd, edit);
 296     edit_my_define (h, 10, _("Quit"), cmd_F10, edit);
 297
 298     redraw_labels (h);
 299 }
 300
 301 void edit_update_screen (WEdit * e)
 302 {
 303     edit_scroll_screen_over_cursor (e);
 304
 305     edit_update_curs_col (e);
 306     edit_status (e);
 307
 308 /* pop all events for this window for internal handling */
 309
 310     if (!is_idle ()) {
 311         e->force |= REDRAW_PAGE;
 312         return;
 313     }
 314     if (e->force & REDRAW_COMPLETELY)
 315         e->force |= REDRAW_PAGE;
 316     edit_render_keypress (e);
 317 }
 318
 319 static cb_ret_t
 320 edit_callback (WEdit *e, widget_msg_t msg, int parm)
 321 {
 322     switch (msg) {
 323     case WIDGET_INIT:
 324         e->force |= REDRAW_COMPLETELY;
 325         edit_labels (e);
 326         return MSG_HANDLED;
 327
 328     case WIDGET_DRAW:
 329         e->force |= REDRAW_COMPLETELY;
 330         e->num_widget_lines = LINES - 2;
 331         e->num_widget_columns = COLS;
 332         /* fallthrough */
 333
 334     case WIDGET_FOCUS:
 335         edit_update_screen (e);
 336         return MSG_HANDLED;
 337
 338     case WIDGET_KEY:
 339         {
 340             int cmd, ch;
 341
 342             /* first check alt-f, alt-e, alt-s, etc for drop menus */
 343             if (edit_drop_hotkey_menu (e, parm))
 344                 return MSG_HANDLED;
 345             if (!edit_translate_key (e, parm, &cmd, &ch))
 346                 return MSG_NOT_HANDLED;
 347             edit_execute_key_command (e, cmd, ch);
 348             edit_update_screen (e);
 349         }
 350         return MSG_HANDLED;
 351
 352     case WIDGET_CURSOR:
 353         widget_move (&e->widget, e->curs_row + EDIT_TEXT_VERTICAL_OFFSET,
 354                      e->curs_col + e->start_col);
 355         return MSG_HANDLED;
 356
 357     case WIDGET_DESTROY:
 358         edit_clean (e);
 359         return MSG_HANDLED;
 360
 361     default:
 362         return default_proc (msg, parm);
 363     }
 364 }