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 /** \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 "../src/global.h"
  43
  44 #include "../src/tty/tty.h"             /* LINES, COLS */
  45 #include "../src/tty/key.h"             /* is_idle() */
  46
  47 #include "edit-impl.h"
  48 #include "edit-widget.h"
  49
  50 #include "../src/widget.h"              /* buttonbar_redraw() */
  51 #include "../src/menu.h"                /* menubar_new() */
  52
  53 WEdit *wedit;
  54 struct WMenu *edit_menubar;
  55
  56 int column_highlighting = 0;
  57
  58 static cb_ret_t edit_callback (Widget *, widget_msg_t msg, int parm);
  59
  60 static int
  61 edit_event (Gpm_Event *event, void *data)
  62 {
  63     WEdit *edit = (WEdit *) data;
  64
  65     /* Unknown event type */
  66     if (!(event->type & (GPM_DOWN | GPM_DRAG | GPM_UP)))
  67         return MOU_NORMAL;
  68
  69     /* rest of the upper frame, the menu is invisible - call menu */
  70     if ((event->type & GPM_DOWN) && (event->y == 1))
  71         return edit_menubar->widget.mouse (event, edit_menubar);
  72
  73     edit_update_curs_row (edit);
  74     edit_update_curs_col (edit);
  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 MOU_NORMAL;
  81
  82     /* Wheel events */
  83     if ((event->buttons & GPM_B_UP) && (event->type & GPM_DOWN)) {
  84         edit_move_up (edit, 2, 1);
  85         goto update;
  86     }
  87     if ((event->buttons & GPM_B_DOWN) && (event->type & GPM_DOWN)) {
  88         edit_move_down (edit, 2, 1);
  89         goto update;
  90     }
  91
  92     /* A lone up mustn't do anything */
  93     if (edit->mark2 != -1 && event->type & (GPM_UP | GPM_DRAG))
  94         return MOU_NORMAL;
  95
  96     if (event->type & (GPM_DOWN | GPM_UP))
  97         edit_push_key_press (edit);
  98
  99     if (option_cursor_beyond_eol) {
 100         long line_len = edit_move_forward3 (edit, edit_bol (edit, edit->curs1), 0,
 101                                             edit_eol(edit, edit->curs1));
 102         if ( event->x > line_len ) {
 103             edit->over_col = event->x - line_len  - option_line_state_width - 1;
 104             edit->prev_col = line_len;
 105         } else {
 106             edit->over_col = 0;
 107             edit->prev_col = event->x - option_line_state_width - 1;
 108         }
 109     } else {
 110         edit->prev_col = event->x - edit->start_col - option_line_state_width - 1;
 111     }
 112
 113     if (--event->y > (edit->curs_row + 1))
 114         edit_move_down (edit, event->y - (edit->curs_row + 1), 0);
 115     else if (event->y < (edit->curs_row + 1))
 116         edit_move_up (edit, (edit->curs_row + 1) - event->y, 0);
 117     else
 118         edit_move_to_prev_col (edit, edit_bol (edit, edit->curs1));
 119
 120     if (event->type & GPM_DOWN) {
 121         edit_mark_cmd (edit, 1);        /* reset */
 122         edit->highlight = 0;
 123     }
 124
 125     if (!(event->type & GPM_DRAG))
 126         edit_mark_cmd (edit, 0);
 127
 128   update:
 129     edit_find_bracket (edit);
 130     edit->force |= REDRAW_COMPLETELY;
 131     edit_update_curs_row (edit);
 132     edit_update_curs_col (edit);
 133     edit_update_screen (edit);
 134
 135     return MOU_NORMAL;
 136 }
 137
 138 static void
 139 edit_adjust_size (Dlg_head *h)
 140 {
 141     WEdit *edit;
 142     WButtonBar *edit_bar;
 143
 144     edit = (WEdit *) find_widget_type (h, edit_callback);
 145     edit_bar = find_buttonbar (h);
 146
 147     widget_set_size (&edit->widget, 0, 0, LINES - 1, COLS);
 148     widget_set_size ((Widget *) edit_bar, LINES - 1, 0, 1, COLS);
 149     widget_set_size (&edit_menubar->widget, 0, 0, 1, COLS);
 150
 151 #ifdef RESIZABLE_MENUBAR
 152     menubar_arrange (edit_menubar);
 153 #endif
 154 }
 155
 156 /* Callback for the edit dialog */
 157 static cb_ret_t
 158 edit_dialog_callback (Dlg_head *h, dlg_msg_t msg, int parm)
 159 {
 160     WEdit *edit;
 161
 162     switch (msg) {
 163     case DLG_RESIZE:
 164         edit_adjust_size (h);
 165         return MSG_HANDLED;
 166
 167     case DLG_VALIDATE:
 168         edit = (WEdit *) find_widget_type (h, edit_callback);
 169         if (!edit_ok_to_exit (edit)) {
 170             h->running = 1;
 171         }
 172         return MSG_HANDLED;
 173
 174     default:
 175         return default_dlg_callback (h, msg, parm);
 176     }
 177 }
 178
 179 int
 180 edit_file (const char *_file, int line)
 181 {
 182     static int made_directory = 0;
 183     Dlg_head *edit_dlg;
 184     WButtonBar *edit_bar;
 185
 186     if (!made_directory) {
 187         char *dir = concat_dir_and_file (home_dir, EDIT_DIR);
 188         made_directory = (mkdir (dir, 0700) != -1 || errno == EEXIST);
 189         g_free (dir);
 190     }
 191
 192     if (!(wedit = edit_init (NULL, LINES - 2, COLS, _file, line))) {
 193         return 0;
 194     }
 195
 196     /* Create a new dialog and add it widgets to it */
 197     edit_dlg =
 198         create_dlg (0, 0, LINES, COLS, NULL, edit_dialog_callback,
 199                     "[Internal File Editor]", NULL, DLG_WANT_TAB);
 200
 201     init_widget (&(wedit->widget), 0, 0, LINES - 1, COLS,
 202                  edit_callback, edit_event);
 203
 204     widget_want_cursor (wedit->widget, 1);
 205
 206     edit_bar = buttonbar_new (1);
 207
 208     edit_menubar = edit_create_menu ();
 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 (edit_menubar);              /* editmenu.c */
 217
 218     destroy_dlg (edit_dlg);
 219
 220     return 1;
 221 }
 222
 223 const char *
 224 edit_get_file_name (const WEdit *edit)
 225 {
 226     return edit->filename;
 227 }
 228
 229 static void edit_my_define (Dlg_head * h, int idx, const char *text,
 230                             void (*fn) (WEdit *), WEdit * edit)
 231 {
 232     text = edit->labels[idx - 1]? edit->labels[idx - 1] : text;
 233     /* function-cast ok */
 234     buttonbar_set_label_data (h, idx, text, (buttonbarfn) fn, edit);
 235 }
 236
 237
 238 static void cmd_F1 (WEdit * edit)
 239 {
 240     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (1));
 241 }
 242
 243 static void cmd_F2 (WEdit * edit)
 244 {
 245     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (2));
 246 }
 247
 248 static void cmd_F3 (WEdit * edit)
 249 {
 250     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (3));
 251 }
 252
 253 static void cmd_F4 (WEdit * edit)
 254 {
 255     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (4));
 256 }
 257
 258 static void cmd_F5 (WEdit * edit)
 259 {
 260     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (5));
 261 }
 262
 263 static void cmd_F6 (WEdit * edit)
 264 {
 265     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (6));
 266 }
 267
 268 static void cmd_F7 (WEdit * edit)
 269 {
 270     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (7));
 271 }
 272
 273 static void cmd_F8 (WEdit * edit)
 274 {
 275     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (8));
 276 }
 277
 278 #if 0
 279 static void cmd_F9 (WEdit * edit)
 280 {
 281     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (9));
 282 }
 283 #endif
 284
 285 static void cmd_F10 (WEdit * edit)
 286 {
 287     send_message ((Widget *) edit, WIDGET_KEY, KEY_F (10));
 288 }
 289
 290 static void
 291 edit_labels (WEdit *edit)
 292 {
 293     Dlg_head *h = edit->widget.parent;
 294
 295     edit_my_define (h, 1, _("Help"), cmd_F1, edit);
 296     edit_my_define (h, 2, _("Save"), cmd_F2, edit);
 297     edit_my_define (h, 3, _("Mark"), cmd_F3, edit);
 298     edit_my_define (h, 4, _("Replac"), cmd_F4, edit);
 299     edit_my_define (h, 5, _("Copy"), cmd_F5, edit);
 300     edit_my_define (h, 6, _("Move"), cmd_F6, edit);
 301     edit_my_define (h, 7, _("Search"), cmd_F7, edit);
 302     edit_my_define (h, 8, _("Delete"), cmd_F8, edit);
 303     edit_my_define (h, 9, _("PullDn"), edit_menu_cmd, edit);
 304     edit_my_define (h, 10, _("Quit"), cmd_F10, edit);
 305
 306     buttonbar_redraw (h);
 307 }
 308
 309 void edit_update_screen (WEdit * e)
 310 {
 311     edit_scroll_screen_over_cursor (e);
 312
 313     edit_update_curs_col (e);
 314     edit_status (e);
 315
 316 /* pop all events for this window for internal handling */
 317
 318     if (!is_idle ()) {
 319         e->force |= REDRAW_PAGE;
 320         return;
 321     }
 322     if (e->force & REDRAW_COMPLETELY)
 323         e->force |= REDRAW_PAGE;
 324     edit_render_keypress (e);
 325 }
 326
 327 static cb_ret_t
 328 edit_callback (Widget *w, widget_msg_t msg, int parm)
 329 {
 330     WEdit *e = (WEdit *) w;
 331
 332     switch (msg) {
 333     case WIDGET_INIT:
 334         e->force |= REDRAW_COMPLETELY;
 335         edit_labels (e);
 336         return MSG_HANDLED;
 337
 338     case WIDGET_DRAW:
 339         e->force |= REDRAW_COMPLETELY;
 340         e->num_widget_lines = LINES - 2;
 341         e->num_widget_columns = COLS;
 342         /* fallthrough */
 343
 344     case WIDGET_FOCUS:
 345         edit_update_screen (e);
 346         return MSG_HANDLED;
 347
 348     case WIDGET_KEY:
 349         {
 350             int cmd, ch;
 351
 352             /* The user may override the access-keys for the menu bar. */
 353             if (edit_translate_key (e, parm, &cmd, &ch)) {
 354                 edit_execute_key_command (e, cmd, ch);
 355                 edit_update_screen (e);
 356                 return MSG_HANDLED;
 357             } else  if (edit_drop_hotkey_menu (e, parm)) {
 358                 return MSG_HANDLED;
 359             } else {
 360                 return MSG_NOT_HANDLED;
 361             }
 362         }
 363
 364     case WIDGET_CURSOR:
 365         widget_move (&e->widget, e->curs_row + EDIT_TEXT_VERTICAL_OFFSET,
 366                      e->curs_col + e->start_col + e->over_col +
 367                      EDIT_TEXT_HORIZONTAL_OFFSET + option_line_state_width);
 368         return MSG_HANDLED;
 369
 370     case WIDGET_DESTROY:
 371         edit_clean (e);
 372         return MSG_HANDLED;
 373
 374     default:
 375         return default_proc (msg, parm);
 376     }
 377 }