edit/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 #include <config.h>
  25
  26 #include <stdio.h>
  27 #include <stdarg.h>
  28 #include <sys/types.h>
  29 #ifdef HAVE_UNISTD_H
  30 #    include <unistd.h>
  31 #endif
  32 #include <string.h>
  33 #include <ctype.h>
  34 #include <errno.h>
  35 #include <sys/stat.h>
  36 #include <stdlib.h>
  37
  38 #include "../src/global.h"
  39
  40 #include "edit.h"
  41 #include "edit-widget.h"
  42
  43 #include "../src/tty.h"         /* LINES */
  44 #include "../src/widget.h"      /* buttonbar_redraw() */
  45 #include "../src/menu.h"        /* menubar_new() */
  46 #include "../src/key.h"         /* is_idle() */
  47
  48 WEdit *wedit;
  49 struct WMenu *edit_menubar;
  50
  51 int column_highlighting = 0;
  52
  53 static cb_ret_t edit_callback (Widget *, widget_msg_t msg, int parm);
  54
  55 static int
  56 edit_event (WEdit * edit, Gpm_Event * event, int *result)
  57 {
  58     *result = MOU_NORMAL;
  59     edit_update_curs_row (edit);
  60     edit_update_curs_col (edit);
  61
  62     /* Unknown event type */
  63     if (!(event->type & (GPM_DOWN | GPM_DRAG | GPM_UP)))
  64         return 0;
  65
  66     /* Wheel events */
  67     if ((event->buttons & GPM_B_UP) && (event->type & GPM_DOWN)) {
  68         edit_move_up (edit, 2, 1);
  69         goto update;
  70     }
  71     if ((event->buttons & GPM_B_DOWN) && (event->type & GPM_DOWN)) {
  72         edit_move_down (edit, 2, 1);
  73         goto update;
  74     }
  75
  76     /* Outside editor window */
  77     if (event->y <= 1 || event->x <= 0
  78         || event->x > edit->num_widget_columns
  79         || event->y > edit->num_widget_lines + 1)
  80         return 0;
  81
  82     /* A lone up mustn't do anything */
  83     if (edit->mark2 != -1 && event->type & (GPM_UP | GPM_DRAG))
  84         return 1;
  85
  86     if (event->type & (GPM_DOWN | GPM_UP))
  87         edit_push_key_press (edit);
  88
  89     edit->prev_col = event->x - edit->start_col - 1;
  90
  91     if (--event->y > (edit->curs_row + 1))
  92         edit_move_down (edit, event->y - (edit->curs_row + 1), 0);
  93     else if (event->y < (edit->curs_row + 1))
  94         edit_move_up (edit, (edit->curs_row + 1) - event->y, 0);
  95     else
  96         edit_move_to_prev_col (edit, edit_bol (edit, edit->curs1));
  97
  98     if (event->type & GPM_DOWN) {
  99         edit_mark_cmd (edit, 1);        /* reset */
 100         edit->highlight = 0;
 101     }
 102
 103     if (!(event->type & GPM_DRAG))
 104         edit_mark_cmd (edit, 0);
 105
 106   update:
 107     edit_find_bracket (edit);
 108     edit->force |= REDRAW_COMPLETELY;
 109     edit_update_curs_row (edit);
 110     edit_update_curs_col (edit);
 111     edit_update_screen (edit);
 112
 113     return 1;
 114 }
 115
 116
 117 static int
 118 edit_mouse_event (Gpm_Event *event, void *x)
 119 {
 120     int result;
 121     if (edit_event ((WEdit *) x, event, &result))
 122         return result;
 123     else
 124         return (*edit_menubar->widget.mouse) (event, edit_menubar);
 125 }
 126
 127 static void
 128 edit_adjust_size (Dlg_head *h)
 129 {
 130     WEdit *edit;
 131     WButtonBar *edit_bar;
 132
 133     edit = (WEdit *) find_widget_type (h, edit_callback);
 134     edit_bar = find_buttonbar (h);
 135
 136     widget_set_size (&edit->widget, 0, 0, LINES - 1, COLS);
 137     widget_set_size ((Widget *) edit_bar, LINES - 1, 0, 1, COLS);
 138     widget_set_size (&edit_menubar->widget, 0, 0, 1, COLS);
 139
 140 #ifdef RESIZABLE_MENUBAR
 141     menubar_arrange (edit_menubar);
 142 #endif
 143 }
 144
 145 /* Callback for the edit dialog */
 146 static cb_ret_t
 147 edit_dialog_callback (Dlg_head *h, dlg_msg_t msg, int parm)
 148 {
 149     WEdit *edit;
 150
 151     switch (msg) {
 152     case DLG_RESIZE:
 153         edit_adjust_size (h);
 154         return MSG_HANDLED;
 155
 156     case DLG_VALIDATE:
 157         edit = (WEdit *) find_widget_type (h, edit_callback);
 158         if (!edit_ok_to_exit (edit)) {
 159             h->running = 1;
 160         }
 161         return MSG_HANDLED;
 162
 163     default:
 164         return default_dlg_callback (h, msg, parm);
 165     }
 166 }
 167
 168 int
 169 edit_file (const char *_file, int line)
 170 {
 171     static int made_directory = 0;
 172     Dlg_head *edit_dlg;
 173     WButtonBar *edit_bar;
 174
 175     if (!made_directory) {
 176         char *dir = concat_dir_and_file (home_dir, EDIT_DIR);
 177         made_directory = (mkdir (dir, 0700) != -1 || errno == EEXIST);
 178         g_free (dir);
 179     }
 180
 181     if (!(wedit = edit_init (NULL, LINES - 2, COLS, _file, line))) {
 182         return 0;
 183     }
 184
 185     /* Create a new dialog and add it widgets to it */
 186     edit_dlg =
 187         create_dlg (0, 0, LINES, COLS, NULL, edit_dialog_callback,
 188                     "[Internal File Editor]", NULL, DLG_WANT_TAB);
 189
 190     init_widget (&(wedit->widget), 0, 0, LINES - 1, COLS,
 191                  edit_callback,
 192                  edit_mouse_event);
 193
 194     widget_want_cursor (wedit->widget, 1);
 195
 196     edit_bar = buttonbar_new (1);
 197
 198     edit_menubar = edit_init_menu ();
 199
 200     add_widget (edit_dlg, edit_bar);
 201     add_widget (edit_dlg, wedit);
 202     add_widget (edit_dlg, edit_menubar);
 203
 204     run_dlg (edit_dlg);
 205
 206     edit_done_menu (edit_menubar);              /* editmenu.c */
 207
 208     destroy_dlg (edit_dlg);
 209
 210     return 1;
 211 }
 212
 213 static void edit_my_define (Dlg_head * h, int idx, const char *text,
 214                             void (*fn) (WEdit *), WEdit * edit)
 215 {
 216     text = edit->labels[idx - 1]? edit->labels[idx - 1] : text;
 217     /* function-cast ok */
 218     buttonbar_set_label_data (h, idx, text, (buttonbarfn) fn, edit);
 219 }
 220
 221
 222 static void cmd_F1 (WEdit * edit)
 223 {
 224     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (1));
 225 }
 226
 227 static void cmd_F2 (WEdit * edit)
 228 {
 229     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (2));
 230 }
 231
 232 static void cmd_F3 (WEdit * edit)
 233 {
 234     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (3));
 235 }
 236
 237 static void cmd_F4 (WEdit * edit)
 238 {
 239     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (4));
 240 }
 241
 242 static void cmd_F5 (WEdit * edit)
 243 {
 244     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (5));
 245 }
 246
 247 static void cmd_F6 (WEdit * edit)
 248 {
 249     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (6));
 250 }
 251
 252 static void cmd_F7 (WEdit * edit)
 253 {
 254     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (7));
 255 }
 256
 257 static void cmd_F8 (WEdit * edit)
 258 {
 259     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (8));
 260 }
 261
 262 #if 0
 263 static void cmd_F9 (WEdit * edit)
 264 {
 265     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (9));
 266 }
 267 #endif
 268
 269 static void cmd_F10 (WEdit * edit)
 270 {
 271     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (10));
 272 }
 273
 274 static void
 275 edit_labels (WEdit *edit)
 276 {
 277     Dlg_head *h = edit->widget.parent;
 278
 279     edit_my_define (h, 1, _("Help"), cmd_F1, edit);
 280     edit_my_define (h, 2, _("Save"), cmd_F2, edit);
 281     edit_my_define (h, 3, _("Mark"), cmd_F3, edit);
 282     edit_my_define (h, 4, _("Replac"), cmd_F4, edit);
 283     edit_my_define (h, 5, _("Copy"), cmd_F5, edit);
 284     edit_my_define (h, 6, _("Move"), cmd_F6, edit);
 285     edit_my_define (h, 7, _("Search"), cmd_F7, edit);
 286     edit_my_define (h, 8, _("Delete"), cmd_F8, edit);
 287     edit_my_define (h, 9, _("PullDn"), edit_menu_cmd, edit);
 288     edit_my_define (h, 10, _("Quit"), cmd_F10, edit);
 289
 290     buttonbar_redraw (h);
 291 }
 292
 293 void edit_update_screen (WEdit * e)
 294 {
 295     edit_scroll_screen_over_cursor (e);
 296
 297     edit_update_curs_col (e);
 298     edit_status (e);
 299
 300 /* pop all events for this window for internal handling */
 301
 302     if (!is_idle ()) {
 303         e->force |= REDRAW_PAGE;
 304         return;
 305     }
 306     if (e->force & REDRAW_COMPLETELY)
 307         e->force |= REDRAW_PAGE;
 308     edit_render_keypress (e);
 309 }
 310
 311 static cb_ret_t
 312 edit_callback (Widget *w, widget_msg_t msg, int parm)
 313 {
 314     WEdit *e = (WEdit *) w;
 315
 316     switch (msg) {
 317     case WIDGET_INIT:
 318         e->force |= REDRAW_COMPLETELY;
 319         edit_labels (e);
 320         return MSG_HANDLED;
 321
 322     case WIDGET_DRAW:
 323         e->force |= REDRAW_COMPLETELY;
 324         e->num_widget_lines = LINES - 2;
 325         e->num_widget_columns = COLS;
 326         /* fallthrough */
 327
 328     case WIDGET_FOCUS:
 329         edit_update_screen (e);
 330         return MSG_HANDLED;
 331
 332     case WIDGET_KEY:
 333         {
 334             int cmd, ch;
 335
 336             /* The user may override the access-keys for the menu bar. */
 337             if (edit_translate_key (e, parm, &cmd, &ch)) {
 338                 edit_execute_key_command (e, cmd, ch);
 339                 edit_update_screen (e);
 340                 return MSG_HANDLED;
 341             } else  if (edit_drop_hotkey_menu (e, parm)) {
 342                 return MSG_HANDLED;
 343             } else {
 344                 return MSG_NOT_HANDLED;
 345             }
 346         }
 347
 348     case WIDGET_CURSOR:
 349         widget_move (&e->widget, e->curs_row + EDIT_TEXT_VERTICAL_OFFSET,
 350                      e->curs_col + e->start_col);
 351         return MSG_HANDLED;
 352
 353     case WIDGET_DESTROY:
 354         edit_clean (e);
 355         return MSG_HANDLED;
 356
 357     default:
 358         return default_proc (msg, parm);
 359     }
 360 }