src/w32reg.c

   1 /* Emulate the X Resource Manager through the registry.
   2    Copyright (C) 1990, 1993, 1994, 2001, 2002, 2003, 2004,
   3                  2005, 2006, 2007, 2008  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 /* Written by Kevin Gallo */
  23
  24 #include <config.h>
  25 #include "lisp.h"
  26 #include "w32term.h"
  27 #include "blockinput.h"
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31
  32 #define REG_ROOT "SOFTWARE\\GNU\\Emacs"
  33
  34 /* Default system colors from the Display Control Panel settings.  */
  35 #define SYSTEM_DEFAULT_RESOURCES                          \
  36   "emacs.foreground:SystemWindowText\0"                   \
  37   "emacs.background:SystemWindow\0"                       \
  38   "emacs.tooltip.attributeForeground:SystemInfoText\0"    \
  39   "emacs.tooltip.attributeBackground:SystemInfoWindow\0"  \
  40   "emacs.tool-bar.attributeForeground:SystemButtonText\0" \
  41   "emacs.tool-bar.attributeBackground:SystemButtonFace\0" \
  42   "emacs.menu.attributeForeground:SystemMenuText\0"       \
  43   "emacs.menu.attributeBackground:SystemMenu\0"           \
  44   "emacs.scroll-bar.attributeForeground:SystemScrollbar\0"
  45
  46 /* Other possibilities for default faces:
  47
  48   region: Could use SystemHilight, but interferes with our ability to
  49   see most syntax highlighting through the region face.
  50
  51   modeline: Could use System(In)ActiveTitle, gradient versions (not
  52   supported on 95 and NT), but modeline is more like a status bar
  53   really (which don't appear to be configurable in Windows).
  54
  55   highlight: Could use SystemHotTrackingColor, but it is not supported
  56   on Windows 95 or NT, and other apps only seem to use it for menus
  57   anyway.
  58
  59 */
  60
  61 static char *
  62 w32_get_rdb_resource (rdb, resource)
  63      char *rdb;
  64      char *resource;
  65 {
  66   char *value = rdb;
  67   int len = strlen (resource);
  68
  69   while (*value)
  70     {
  71       /* Comparison is case-insensitive because registry searches are too.  */
  72       if ((strnicmp (value, resource, len) == 0) && (value[len] == ':'))
  73         return xstrdup (&value[len + 1]);
  74
  75       value = strchr (value, '\0') + 1;
  76     }
  77
  78   return NULL;
  79 }
  80
  81 LPBYTE
  82 w32_get_string_resource (name, class, dwexptype)
  83      char *name, *class;
  84      DWORD dwexptype;
  85 {
  86   LPBYTE lpvalue = NULL;
  87   HKEY hrootkey = NULL;
  88   DWORD dwType;
  89   DWORD cbData;
  90   BOOL ok = FALSE;
  91   HKEY hive = HKEY_CURRENT_USER;
  92
  93  trykey:
  94
  95   BLOCK_INPUT;
  96
  97   /* Check both the current user and the local machine to see if we have
  98      any resources */
  99
 100   if (RegOpenKeyEx (hive, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
 101     {
 102       char *keyname;
 103
 104       if (RegQueryValueEx (hrootkey, name, NULL, &dwType, NULL, &cbData) == ERROR_SUCCESS
 105           && dwType == dwexptype)
 106         {
 107           keyname = name;
 108         }
 109       else if (RegQueryValueEx (hrootkey, class, NULL, &dwType, NULL, &cbData) == ERROR_SUCCESS
 110                && dwType == dwexptype)
 111         {
 112           keyname = class;
 113         }
 114       else
 115         {
 116           keyname = NULL;
 117         }
 118
 119       ok = (keyname
 120             && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL
 121             && RegQueryValueEx (hrootkey, keyname, NULL, NULL, lpvalue, &cbData) == ERROR_SUCCESS);
 122
 123       RegCloseKey (hrootkey);
 124     }
 125
 126   UNBLOCK_INPUT;
 127
 128   if (!ok)
 129     {
 130       if (lpvalue)
 131         {
 132           xfree (lpvalue);
 133           lpvalue = NULL;
 134         }
 135       if (hive == HKEY_CURRENT_USER)
 136         {
 137           hive = HKEY_LOCAL_MACHINE;
 138           goto trykey;
 139         }
 140
 141       /* Check if there are Windows specific defaults defined.  */
 142       return w32_get_rdb_resource (SYSTEM_DEFAULT_RESOURCES, name);
 143     }
 144   return (lpvalue);
 145 }
 146
 147 /* Retrieve the string resource specified by NAME with CLASS from
 148    database RDB. */
 149
 150 char *
 151 x_get_string_resource (rdb, name, class)
 152      XrmDatabase rdb;
 153      char *name, *class;
 154 {
 155   if (rdb)
 156     {
 157       char *resource;
 158
 159       if (resource = w32_get_rdb_resource (rdb, name))
 160         return resource;
 161       if (resource = w32_get_rdb_resource (rdb, class))
 162         return resource;
 163     }
 164
 165   return (w32_get_string_resource (name, class, REG_SZ));
 166 }
 167
 168 /* arch-tag: 755fce25-42d7-4acb-874f-2fb42336823d
 169    (do not change this comment) */