edit/choosesyntax.c

   1 /* User interface for syntax selection.
   2
   3    Copyright (C) 2005, 2006 Leonard den Ottolander <leonard den ottolander nl>
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License version 2 as
   7    published by the Free Software Foundation.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  */
  18
  19 #include <config.h>
  20 #include "edit.h"
  21 #include "../src/global.h"
  22 #include "../src/wtools.h"
  23
  24 #define MAX_ENTRY_LEN 40
  25 #define LIST_LINES 14
  26 #define N_DFLT_ENTRIES 2
  27
  28 static int
  29 pstrcmp(const void *p1, const void *p2)
  30 {
  31     return strcmp(*(char**)p1, *(char**)p2);
  32 }
  33
  34 static int
  35 exec_edit_syntax_dialog (const char **names) {
  36     int i;
  37
  38     Listbox *syntaxlist = create_listbox_window (MAX_ENTRY_LEN, LIST_LINES,
  39         _(" Choose syntax highlighting "), NULL);
  40     LISTBOX_APPEND_TEXT (syntaxlist, 'A', _("< Auto >"), NULL);
  41     LISTBOX_APPEND_TEXT (syntaxlist, 'R', _("< Reload Current Syntax >"), NULL);
  42
  43     for (i = 0; names[i]; i++) {
  44         LISTBOX_APPEND_TEXT (syntaxlist, 0, names[i], NULL);
  45         if (! option_auto_syntax && option_syntax_type &&
  46             (strcmp (names[i], option_syntax_type) == 0))
  47             listbox_select_by_number (syntaxlist->list, i + N_DFLT_ENTRIES);
  48     }
  49
  50     return run_listbox (syntaxlist);
  51 }
  52
  53 void
  54 edit_syntax_dialog (void) {
  55     char *old_syntax_type;
  56     int old_auto_syntax, syntax;
  57     char **names;
  58     int i;
  59     int force_reload = 0;
  60     int count = 0;
  61
  62     names = (char**) g_malloc (sizeof (char*));
  63     names[0] = NULL;
  64     /* We fill the list of syntax files every time the editor is invoked.
  65        Instead we could save the list to a file and update it once the syntax
  66        file gets updated (either by testing or by explicit user command). */
  67     edit_load_syntax (NULL, &names, NULL);
  68     while (names[count++] != NULL);
  69     qsort(names, count - 1, sizeof(char*), pstrcmp);
  70
  71     if ((syntax = exec_edit_syntax_dialog ((const char**) names)) < 0) {
  72         for (i = 0; names[i]; i++) {
  73             g_free (names[i]);
  74         }
  75         g_free (names);
  76         return;
  77     }
  78
  79     old_auto_syntax = option_auto_syntax;
  80     old_syntax_type = g_strdup (option_syntax_type);
  81
  82     switch (syntax) {
  83         case 0: /* auto syntax */
  84             option_auto_syntax = 1;
  85             break;
  86         case 1: /* reload current syntax */
  87             force_reload = 1;
  88             break;
  89         default:
  90             option_auto_syntax = 0;
  91             g_free (option_syntax_type);
  92             option_syntax_type = g_strdup (names[syntax - N_DFLT_ENTRIES]);
  93     }
  94
  95     /* Load or unload syntax rules if the option has changed */
  96     if ((option_auto_syntax && !old_auto_syntax) || old_auto_syntax ||
  97         (old_syntax_type && option_syntax_type &&
  98         (strcmp (old_syntax_type, option_syntax_type) != 0)) ||
  99         force_reload)
 100         edit_load_syntax (wedit, NULL, option_syntax_type);
 101
 102     for (i = 0; names[i]; i++) {
 103         g_free (names[i]);
 104     }
 105     g_free (names);
 106     g_free (old_syntax_type);
 107 }