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, 2009, 2010  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 <setjmp.h>
  24 #include "lisp.h"
  25 #include "w32term.h"
  26 #include "blockinput.h"
  27
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #define REG_ROOT "SOFTWARE\\GNU\\Emacs"
  32
  33 /* Default system colors from the Display Control Panel settings.  */
  34 #define SYSTEM_DEFAULT_RESOURCES                          \
  35   "emacs.foreground:SystemWindowText\0"                   \
  36   "emacs.background:SystemWindow\0"                       \
  37   "emacs.tooltip.attributeForeground:SystemInfoText\0"    \
  38   "emacs.tooltip.attributeBackground:SystemInfoWindow\0"  \
  39   "emacs.tool-bar.attributeForeground:SystemButtonText\0" \
  40   "emacs.tool-bar.attributeBackground:SystemButtonFace\0" \
  41   "emacs.menu.attributeForeground:SystemMenuText\0"       \
  42   "emacs.menu.attributeBackground:SystemMenu\0"           \
  43   "emacs.scroll-bar.attributeForeground:SystemScrollbar\0"
  44
  45 /* Other possibilities for default faces:
  46
  47   region: Could use SystemHilight, but interferes with our ability to
  48   see most syntax highlighting through the region face.
  49
  50   modeline: Could use System(In)ActiveTitle, gradient versions (not
  51   supported on 95 and NT), but modeline is more like a status bar
  52   really (which don't appear to be configurable in Windows).
  53
  54   highlight: Could use SystemHotTrackingColor, but it is not supported
  55   on Windows 95 or NT, and other apps only seem to use it for menus
  56   anyway.
  57
  58 */
  59
  60 static char *
  61 w32_get_rdb_resource (char *rdb, char *resource)
  62 {
  63   char *value = rdb;
  64   int len = strlen (resource);
  65
  66   while (*value)
  67     {
  68       /* Comparison is case-insensitive because registry searches are too.  */
  69       if ((strnicmp (value, resource, len) == 0) && (value[len] == ':'))
  70         return xstrdup (&value[len + 1]);
  71
  72       value = strchr (value, '\0') + 1;
  73     }
  74
  75   return NULL;
  76 }
  77
  78 static LPBYTE
  79 w32_get_string_resource (char *name, char *class, DWORD dwexptype)
  80 {
  81   LPBYTE lpvalue = NULL;
  82   HKEY hrootkey = NULL;
  83   DWORD dwType;
  84   DWORD cbData;
  85   BOOL ok = FALSE;
  86   HKEY hive = HKEY_CURRENT_USER;
  87
  88  trykey:
  89
  90   BLOCK_INPUT;
  91
  92   /* Check both the current user and the local machine to see if we have
  93      any resources */
  94
  95   if (RegOpenKeyEx (hive, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
  96     {
  97       char *keyname;
  98
  99       if (RegQueryValueEx (hrootkey, name, NULL, &dwType, NULL, &cbData) == ERROR_SUCCESS
 100           && dwType == dwexptype)
 101         {
 102           keyname = name;
 103         }
 104       else if (RegQueryValueEx (hrootkey, class, NULL, &dwType, NULL, &cbData) == ERROR_SUCCESS
 105                && dwType == dwexptype)
 106         {
 107           keyname = class;
 108         }
 109       else
 110         {
 111           keyname = NULL;
 112         }
 113
 114       ok = (keyname
 115             && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL
 116             && RegQueryValueEx (hrootkey, keyname, NULL, NULL, lpvalue, &cbData) == ERROR_SUCCESS);
 117
 118       RegCloseKey (hrootkey);
 119     }
 120
 121   UNBLOCK_INPUT;
 122
 123   if (!ok)
 124     {
 125       if (lpvalue)
 126         {
 127           xfree (lpvalue);
 128           lpvalue = NULL;
 129         }
 130       if (hive == HKEY_CURRENT_USER)
 131         {
 132           hive = HKEY_LOCAL_MACHINE;
 133           goto trykey;
 134         }
 135
 136       /* Check if there are Windows specific defaults defined.  */
 137       return w32_get_rdb_resource (SYSTEM_DEFAULT_RESOURCES, name);
 138     }
 139   return (lpvalue);
 140 }
 141
 142 /* Retrieve the string resource specified by NAME with CLASS from
 143    database RDB. */
 144
 145 char *
 146 x_get_string_resource (XrmDatabase rdb, char *name, char *class)
 147 {
 148   if (rdb)
 149     {
 150       char *resource;
 151
 152       if (resource = w32_get_rdb_resource (rdb, name))
 153         return resource;
 154       if (resource = w32_get_rdb_resource (rdb, class))
 155         return resource;
 156     }
 157
 158   if (inhibit_x_resources)
 159     /* --quick was passed, so this is a no-op.  */
 160     return NULL;
 161
 162   return (w32_get_string_resource (name, class, REG_SZ));
 163 }
 164
 165 /* arch-tag: 755fce25-42d7-4acb-874f-2fb42336823d
 166    (do not change this comment) */