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
  37 #include <stdlib.h>
  38
  39 #include "../src/global.h"
  40
  41 #include "edit.h"
  42 #include "edit-widget.h"
  43
  44 #include "../src/tty.h"         /* LINES */
  45 #include "../src/widget.h"      /* buttonbar_redraw() */
  46 #include "../src/menu.h"        /* menubar_new() */
  47 #include "../src/key.h"         /* is_idle() */
  48
  49 WEdit *wedit;
  50 struct WMenu *edit_menubar;
  51
  52 int column_highlighting = 0;
  53
  54 static cb_ret_t edit_callback (Widget *, widget_msg_t msg, int parm);
  55
  56 static int
  57 edit_event (WEdit * edit, Gpm_Event * event, int *result)
  58 {
  59     *result = MOU_NORMAL;
  60     edit_update_curs_row (edit);
  61     edit_update_curs_col (edit);
  62
  63     /* Unknown event type */
  64     if (!(event->type & (GPM_DOWN | GPM_DRAG | GPM_UP)))
  65         return 0;
  66
  67     /* Wheel events */
  68     if ((event->buttons & GPM_B_UP) && (event->type & GPM_DOWN)) {
  69         edit_move_up (edit, 2, 1);
  70         goto update;
  71     }
  72     if ((event->buttons & GPM_B_DOWN) && (event->type & GPM_DOWN)) {
  73         edit_move_down (edit, 2, 1);
  74         goto update;
  75     }
  76
  77     /* Outside editor window */
  78     if (event->y <= 1 || event->x <= 0
  79         || event->x > edit->num_widget_columns
  80         || event->y > edit->num_widget_lines + 1)
  81         return 0;
  82
  83     /* A lone up mustn't do anything */
  84     if (edit->mark2 != -1 && event->type & (GPM_UP | GPM_DRAG))
  85         return 1;
  86
  87     if (event->type & (GPM_DOWN | GPM_UP))
  88         edit_push_key_press (edit);
  89
  90     edit->prev_col = event->x - edit->start_col - 1;
  91
  92     if (--event->y > (edit->curs_row + 1))
  93         edit_move_down (edit, event->y - (edit->curs_row + 1), 0);
  94     else if (event->y < (edit->curs_row + 1))
  95         edit_move_up (edit, (edit->curs_row + 1) - event->y, 0);
  96     else
  97         edit_move_to_prev_col (edit, edit_bol (edit, edit->curs1));
  98
  99     if (event->type & GPM_DOWN) {
 100         edit_mark_cmd (edit, 1);        /* reset */
 101         edit->highlight = 0;
 102     }
 103
 104     if (!(event->type & GPM_DRAG))
 105         edit_mark_cmd (edit, 0);
 106
 107   update:
 108     edit_find_bracket (edit);
 109     edit->force |= REDRAW_COMPLETELY;
 110     edit_update_curs_row (edit);
 111     edit_update_curs_col (edit);
 112     edit_update_screen (edit);
 113
 114     return 1;
 115 }
 116
 117
 118 static int
 119 edit_mouse_event (Gpm_Event *event, void *x)
 120 {
 121     int result;
 122     if (edit_event ((WEdit *) x, event, &result))
 123         return result;
 124     else
 125         return (*edit_menubar->widget.mouse) (event, edit_menubar);
 126 }
 127
 128 static void
 129 edit_adjust_size (Dlg_head *h)
 130 {
 131     WEdit *edit;
 132     WButtonBar *edit_bar;
 133
 134     edit = (WEdit *) find_widget_type (h, edit_callback);
 135     edit_bar = find_buttonbar (h);
 136
 137     widget_set_size (&edit->widget, 0, 0, LINES - 1, COLS);
 138     widget_set_size ((Widget *) edit_bar, LINES - 1, 0, 1, COLS);
 139     widget_set_size (&edit_menubar->widget, 0, 0, 1, COLS);
 140
 141 #ifdef RESIZABLE_MENUBAR
 142     menubar_arrange (edit_menubar);
 143 #endif
 144 }
 145
 146 /* Callback for the edit dialog */
 147 static cb_ret_t
 148 edit_dialog_callback (Dlg_head *h, dlg_msg_t msg, int parm)
 149 {
 150     WEdit *edit;
 151
 152     switch (msg) {
 153     case DLG_RESIZE:
 154         edit_adjust_size (h);
 155         return MSG_HANDLED;
 156
 157     case DLG_VALIDATE:
 158         edit = (WEdit *) find_widget_type (h, edit_callback);
 159         if (!edit_ok_to_exit (edit)) {
 160             h->running = 1;
 161         }
 162         return MSG_HANDLED;
 163
 164     default:
 165         return default_dlg_callback (h, msg, parm);
 166     }
 167 }
 168
 169 int
 170 edit_file (const char *_file, int line)
 171 {
 172     static int made_directory = 0;
 173     Dlg_head *edit_dlg;
 174     WButtonBar *edit_bar;
 175
 176     if (!made_directory) {
 177         char *dir = concat_dir_and_file (home_dir, EDIT_DIR);
 178         made_directory = (mkdir (dir, 0700) != -1 || errno == EEXIST);
 179         g_free (dir);
 180     }
 181
 182     if (!(wedit = edit_init (NULL, LINES - 2, COLS, _file, line))) {
 183         return 0;
 184     }
 185
 186     /* Create a new dialog and add it widgets to it */
 187     edit_dlg =
 188         create_dlg (0, 0, LINES, COLS, NULL, edit_dialog_callback,
 189                     "[Internal File Editor]", NULL, DLG_WANT_TAB);
 190
 191     init_widget (&(wedit->widget), 0, 0, LINES - 1, COLS,
 192                  edit_callback,
 193                  edit_mouse_event);
 194
 195     widget_want_cursor (wedit->widget, 1);
 196
 197     edit_bar = buttonbar_new (1);
 198
 199     edit_menubar = edit_init_menu ();
 200
 201     add_widget (edit_dlg, edit_bar);
 202     add_widget (edit_dlg, wedit);
 203     add_widget (edit_dlg, edit_menubar);
 204
 205     run_dlg (edit_dlg);
 206
 207     edit_done_menu (edit_menubar);              /* editmenu.c */
 208
 209     destroy_dlg (edit_dlg);
 210
 211     return 1;
 212 }
 213
 214 static void edit_my_define (Dlg_head * h, int idx, const char *text,
 215                             void (*fn) (WEdit *), WEdit * edit)
 216 {
 217     text = edit->labels[idx - 1]? edit->labels[idx - 1] : text;
 218     /* function-cast ok */
 219     buttonbar_set_label_data (h, idx, text, (buttonbarfn) fn, edit);
 220 }
 221
 222
 223 static void cmd_F1 (WEdit * edit)
 224 {
 225     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (1));
 226 }
 227
 228 static void cmd_F2 (WEdit * edit)
 229 {
 230     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (2));
 231 }
 232
 233 static void cmd_F3 (WEdit * edit)
 234 {
 235     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (3));
 236 }
 237
 238 static void cmd_F4 (WEdit * edit)
 239 {
 240     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (4));
 241 }
 242
 243 static void cmd_F5 (WEdit * edit)
 244 {
 245     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (5));
 246 }
 247
 248 static void cmd_F6 (WEdit * edit)
 249 {
 250     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (6));
 251 }
 252
 253 static void cmd_F7 (WEdit * edit)
 254 {
 255     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (7));
 256 }
 257
 258 static void cmd_F8 (WEdit * edit)
 259 {
 260     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (8));
 261 }
 262
 263 #if 0
 264 static void cmd_F9 (WEdit * edit)
 265 {
 266     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (9));
 267 }
 268 #endif
 269
 270 static void cmd_F10 (WEdit * edit)
 271 {
 272     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (10));
 273 }
 274
 275 static void
 276 edit_labels (WEdit *edit)
 277 {
 278     Dlg_head *h = edit->widget.parent;
 279
 280     edit_my_define (h, 1, _("Help"), cmd_F1, edit);
 281     edit_my_define (h, 2, _("Save"), cmd_F2, edit);
 282     edit_my_define (h, 3, _("Mark"), cmd_F3, edit);
 283     edit_my_define (h, 4, _("Replac"), cmd_F4, edit);
 284     edit_my_define (h, 5, _("Copy"), cmd_F5, edit);
 285     edit_my_define (h, 6, _("Move"), cmd_F6, edit);
 286     edit_my_define (h, 7, _("Search"), cmd_F7, edit);
 287     edit_my_define (h, 8, _("Delete"), cmd_F8, edit);
 288     edit_my_define (h, 9, _("PullDn"), edit_menu_cmd, edit);
 289     edit_my_define (h, 10, _("Quit"), cmd_F10, edit);
 290
 291     buttonbar_redraw (h);
 292 }
 293
 294 void edit_update_screen (WEdit * e)
 295 {
 296     edit_scroll_screen_over_cursor (e);
 297
 298     edit_update_curs_col (e);
 299     edit_status (e);
 300
 301 /* pop all events for this window for internal handling */
 302
 303     if (!is_idle ()) {
 304         e->force |= REDRAW_PAGE;
 305         return;
 306     }
 307     if (e->force & REDRAW_COMPLETELY)
 308         e->force |= REDRAW_PAGE;
 309     edit_render_keypress (e);
 310 }
 311
 312 static cb_ret_t
 313 edit_callback (Widget *w, widget_msg_t msg, int parm)
 314 {
 315     WEdit *e = (WEdit *) w;
 316
 317     switch (msg) {
 318     case WIDGET_INIT:
 319         e->force |= REDRAW_COMPLETELY;
 320         edit_labels (e);
 321         return MSG_HANDLED;
 322
 323     case WIDGET_DRAW:
 324         e->force |= REDRAW_COMPLETELY;
 325         e->num_widget_lines = LINES - 2;
 326         e->num_widget_columns = COLS;
 327         /* fallthrough */
 328
 329     case WIDGET_FOCUS:
 330         edit_update_screen (e);
 331         return MSG_HANDLED;
 332
 333     case WIDGET_KEY:
 334         {
 335             int cmd, ch;
 336
 337             /* The user may override the access-keys for the menu bar. */
 338             if (edit_translate_key (e, parm, &cmd, &ch)) {
 339                 edit_execute_key_command (e, cmd, ch);
 340                 edit_update_screen (e);
 341                 return MSG_HANDLED;
 342             } else  if (edit_drop_hotkey_menu (e, parm)) {
 343                 return MSG_HANDLED;
 344             } else {
 345                 return MSG_NOT_HANDLED;
 346             }
 347         }
 348
 349     case WIDGET_CURSOR:
 350         widget_move (&e->widget, e->curs_row + EDIT_TEXT_VERTICAL_OFFSET,
 351                      e->curs_col + e->start_col);
 352         return MSG_HANDLED;
 353
 354     case WIDGET_DESTROY:
 355         edit_clean (e);
 356         return MSG_HANDLED;
 357
 358     default:
 359         return default_proc (msg, parm);
 360     }
 361 }