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 of the License, or
  10 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* Written by Kevin Gallo */
  21
  22 #include <config.h>
  23 #include "lisp.h"
  24 #include "w32term.h"
  25 #include "blockinput.h"
  26
  27 #include <stdio.h>
  28 #include <string.h>
  29
  30 #define REG_ROOT "SOFTWARE\\GNU\\Emacs"
  31
  32 /* Default system colors from the Display Control Panel settings.  */
  33 #define SYSTEM_DEFAULT_RESOURCES                          \
  34   "emacs.foreground:SystemWindowText\0"                   \
  35   "emacs.background:SystemWindow\0"                       \
  36   "emacs.tooltip.attributeForeground:SystemInfoText\0"    \
  37   "emacs.tooltip.attributeBackground:SystemInfoWindow\0"  \
  38   "emacs.tool-bar.attributeForeground:SystemButtonText\0" \
  39   "emacs.tool-bar.attributeBackground:SystemButtonFace\0" \
  40   "emacs.menu.attributeForeground:SystemMenuText\0"       \
  41   "emacs.menu.attributeBackground:SystemMenu\0"           \
  42   "emacs.scroll-bar.attributeForeground:SystemScrollbar\0"
  43
  44 /* Other possibilities for default faces:
  45
  46   region: Could use SystemHilight, but interferes with our ability to
  47   see most syntax highlighting through the region face.
  48
  49   modeline: Could use System(In)ActiveTitle, gradient versions (not
  50   supported on 95 and NT), but modeline is more like a status bar
  51   really (which don't appear to be configurable in Windows).
  52
  53   highlight: Could use SystemHotTrackingColor, but it is not supported
  54   on Windows 95 or NT, and other apps only seem to use it for menus
  55   anyway.
  56
  57 */
  58
  59 static char *
  60 w32_get_rdb_resource (rdb, resource)
  61      char *rdb;
  62      char *resource;
  63 {
  64   char *value = rdb;
  65   int len = strlen (resource);
  66
  67   while (*value)
  68     {
  69       /* Comparison is case-insensitive because registry searches are too.  */
  70       if ((strnicmp (value, resource, len) == 0) && (value[len] == ':'))
  71         return xstrdup (&value[len + 1]);
  72
  73       value = strchr (value, '\0') + 1;
  74     }
  75
  76   return NULL;
  77 }
  78
  79 LPBYTE
  80 w32_get_string_resource (name, class, dwexptype)
  81      char *name, *class;
  82      DWORD dwexptype;
  83 {
  84   LPBYTE lpvalue = NULL;
  85   HKEY hrootkey = NULL;
  86   DWORD dwType;
  87   DWORD cbData;
  88   BOOL ok = FALSE;
  89   HKEY hive = HKEY_CURRENT_USER;
  90
  91  trykey:
  92
  93   BLOCK_INPUT;
  94
  95   /* Check both the current user and the local machine to see if we have
  96      any resources */
  97
  98   if (RegOpenKeyEx (hive, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
  99     {
 100       char *keyname;
 101
 102       if (RegQueryValueEx (hrootkey, name, NULL, &dwType, NULL, &cbData) == ERROR_SUCCESS
 103           && dwType == dwexptype)
 104         {
 105           keyname = name;
 106         }
 107       else if (RegQueryValueEx (hrootkey, class, NULL, &dwType, NULL, &cbData) == ERROR_SUCCESS
 108                && dwType == dwexptype)
 109         {
 110           keyname = class;
 111         }
 112       else
 113         {
 114           keyname = NULL;
 115         }
 116
 117       ok = (keyname
 118             && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL
 119             && RegQueryValueEx (hrootkey, keyname, NULL, NULL, lpvalue, &cbData) == ERROR_SUCCESS);
 120
 121       RegCloseKey (hrootkey);
 122     }
 123
 124   UNBLOCK_INPUT;
 125
 126   if (!ok)
 127     {
 128       if (lpvalue)
 129         {
 130           xfree (lpvalue);
 131           lpvalue = NULL;
 132         }
 133       if (hive == HKEY_CURRENT_USER)
 134         {
 135           hive = HKEY_LOCAL_MACHINE;
 136           goto trykey;
 137         }
 138
 139       /* Check if there are Windows specific defaults defined.  */
 140       return w32_get_rdb_resource (SYSTEM_DEFAULT_RESOURCES, name);
 141     }
 142   return (lpvalue);
 143 }
 144
 145 /* Retrieve the string resource specified by NAME with CLASS from
 146    database RDB. */
 147
 148 char *
 149 x_get_string_resource (rdb, name, class)
 150      XrmDatabase rdb;
 151      char *name, *class;
 152 {
 153   if (rdb)
 154     {
 155       char *resource;
 156
 157       if (resource = w32_get_rdb_resource (rdb, name))
 158         return resource;
 159       if (resource = w32_get_rdb_resource (rdb, class))
 160         return resource;
 161     }
 162
 163   return (w32_get_string_resource (name, class, REG_SZ));
 164 }
 165
 166 /* arch-tag: 755fce25-42d7-4acb-874f-2fb42336823d
 167    (do not change this comment) */