src/editor/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 /** \file
  20  *  \brief Source: user %interface for syntax %selection
  21  *  \author Leonard den Ottolander
  22  *  \date 2005, 2006
  23  */
  24
  25 #include <config.h>
  26
  27 #include <stdlib.h>
  28 #include <sys/types.h>
  29
  30 #include "lib/global.h"
  31 #include "src/wtools.h"
  32
  33 #include "edit-impl.h"
  34 #include "edit-widget.h"
  35
  36 #define MAX_ENTRY_LEN 40
  37 #define LIST_LINES 14
  38 #define N_DFLT_ENTRIES 2
  39
  40 static int
  41 pstrcmp (const void *p1, const void *p2)
  42 {
  43     return strcmp (*(char **) p1, *(char **) p2);
  44 }
  45
  46 static int
  47 exec_edit_syntax_dialog (const char **names, const char *current_syntax)
  48 {
  49     size_t i;
  50
  51     Listbox *syntaxlist = create_listbox_window (LIST_LINES, MAX_ENTRY_LEN,
  52                                                  _(" Choose syntax highlighting "), NULL);
  53     LISTBOX_APPEND_TEXT (syntaxlist, 'A', _("< Auto >"), NULL);
  54     LISTBOX_APPEND_TEXT (syntaxlist, 'R', _("< Reload Current Syntax >"), NULL);
  55
  56     for (i = 0; names[i] != NULL; i++)
  57     {
  58         LISTBOX_APPEND_TEXT (syntaxlist, 0, names[i], NULL);
  59         if ((current_syntax != NULL) && (strcmp (names[i], current_syntax) == 0))
  60             listbox_select_entry (syntaxlist->list, i + N_DFLT_ENTRIES);
  61     }
  62
  63     return run_listbox (syntaxlist);
  64 }
  65
  66 void
  67 edit_syntax_dialog (WEdit * edit, const char *current_syntax)
  68 {
  69     char *old_syntax_type;
  70     int old_auto_syntax, syntax;
  71     char **names;
  72     gboolean force_reload = FALSE;
  73     size_t count;
  74
  75     names = g_new0 (char *, 1);
  76
  77     /* We fill the list of syntax files every time the editor is invoked.
  78        Instead we could save the list to a file and update it once the syntax
  79        file gets updated (either by testing or by explicit user command). */
  80     edit_load_syntax (NULL, &names, NULL);
  81     count = g_strv_length (names);
  82     qsort (names, count, sizeof (char *), pstrcmp);
  83
  84     syntax = exec_edit_syntax_dialog ((const char **) names, current_syntax);
  85     if (syntax < 0)
  86     {
  87         g_strfreev (names);
  88         return;
  89     }
  90
  91     old_auto_syntax = option_auto_syntax;
  92     old_syntax_type = g_strdup (current_syntax);
  93
  94     switch (syntax)
  95     {
  96     case 0:                    /* auto syntax */
  97         option_auto_syntax = 1;
  98         break;
  99     case 1:                    /* reload current syntax */
 100         force_reload = TRUE;
 101         break;
 102     default:
 103         option_auto_syntax = 0;
 104         g_free (edit->syntax_type);
 105         edit->syntax_type = g_strdup (names[syntax - N_DFLT_ENTRIES]);
 106     }
 107
 108     /* Load or unload syntax rules if the option has changed */
 109     if ((option_auto_syntax && !old_auto_syntax) || old_auto_syntax ||
 110         (old_syntax_type && edit->syntax_type &&
 111          (strcmp (old_syntax_type, edit->syntax_type) != 0)) || force_reload)
 112         edit_load_syntax (edit, NULL, edit->syntax_type);
 113
 114     g_strfreev (names);
 115     g_free (old_syntax_type);
 116 }