libfreerdp/locale/keyboard_x11.c

   1 /**
   2  * FreeRDP: A Remote Desktop Protocol Implementation
   3  * X11 Keyboard Mapping
   4  *
   5  * Copyright 2009-2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *     http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include <winpr/crt.h>
  29 #include <winpr/input.h>
  30
  31 #include "liblocale.h"
  32
  33 #include <freerdp/locale/locale.h>
  34 #include <freerdp/locale/keyboard.h>
  35
  36 #include "keyboard_x11.h"
  37 #include "xkb_layout_ids.h"
  38
  39 int freerdp_detect_keyboard_layout_from_xkb(DWORD* keyboardLayoutId)
  40 {
  41         char* pch;
  42         char* beg;
  43         char* end;
  44         FILE* xprop;
  45         char buffer[1024];
  46         char* layout = NULL;
  47         char* variant = NULL;
  48
  49         /* We start by looking for _XKB_RULES_NAMES_BACKUP which appears to be used by libxklavier */
  50
  51     if (!(xprop = popen("xprop -root _XKB_RULES_NAMES_BACKUP", "r")))
  52                 return 0;
  53
  54         /* Sample output for "Canadian Multilingual Standard"
  55          *
  56          * _XKB_RULES_NAMES_BACKUP(STRING) = "xorg", "pc105", "ca", "multix", ""
  57          * Where "xorg" is the set of rules
  58          * "pc105" the keyboard type
  59          * "ca" the keyboard layout
  60          * "multi" the keyboard layout variant
  61          */
  62
  63         while (fgets(buffer, sizeof(buffer), xprop) != NULL)
  64         {
  65                 if ((pch = strstr(buffer, "_XKB_RULES_NAMES_BACKUP(STRING) = ")) != NULL)
  66                 {
  67                         /* "rules" */
  68                         pch = strchr(&buffer[34], ','); /* We assume it is xorg */
  69                         pch += 1;
  70
  71                         /* "type" */
  72                         pch = strchr(pch, ',');
  73
  74                         /* "layout" */
  75                         beg = strchr(pch + 1, '"');
  76                         beg += 1;
  77
  78                         end = strchr(beg, '"');
  79                         *end = '\0';
  80
  81                         layout = beg;
  82
  83                         /* "variant" */
  84                         beg = strchr(end + 1, '"');
  85                         beg += 1;
  86
  87                         end = strchr(beg, '"');
  88                         *end = '\0';
  89
  90                         variant = beg;
  91                 }
  92         }
  93
  94         pclose(xprop);
  95
  96         DEBUG_KBD("_XKB_RULES_NAMES_BACKUP layout: %s, variant: %s", layout, variant);
  97         *keyboardLayoutId = find_keyboard_layout_in_xorg_rules(layout, variant);
  98
  99         if (*keyboardLayoutId > 0)
 100                 return 0;
 101
 102         /* Check _XKB_RULES_NAMES if _XKB_RULES_NAMES_BACKUP fails */
 103
 104         if (!(xprop = popen("xprop -root _XKB_RULES_NAMES", "r")))
 105                 return 0;
 106
 107         while (fgets(buffer, sizeof(buffer), xprop) != NULL)
 108         {
 109                 if ((pch = strstr(buffer, "_XKB_RULES_NAMES(STRING) = ")) != NULL)
 110                 {
 111                         /* "rules" */
 112                         pch = strchr(&buffer[27], ','); // We assume it is xorg
 113                         pch += 1;
 114
 115                         /* "type" */
 116                         pch = strchr(pch, ',');
 117
 118                         /* "layout" */
 119                         beg = strchr(pch + 1, '"');
 120                         beg += 1;
 121
 122                         end = strchr(beg, '"');
 123                         *end = '\0';
 124
 125                         layout = beg;
 126
 127                         /* "variant" */
 128                         beg = strchr(end + 1, '"');
 129                         beg += 1;
 130
 131                         end = strchr(beg, '"');
 132                         *end = '\0';
 133
 134                         variant = beg;
 135                 }
 136         }
 137
 138         pclose(xprop);
 139
 140         DEBUG_KBD("_XKB_RULES_NAMES layout: %s, variant: %s", layout, variant);
 141         *keyboardLayoutId = find_keyboard_layout_in_xorg_rules(layout, variant);
 142
 143         if (*keyboardLayoutId > 0)
 144                 return *keyboardLayoutId;
 145
 146         return 0;
 147 }
 148
 149 char* freerdp_detect_keymap_from_xkb()
 150 {
 151         char* pch;
 152         char* beg;
 153         char* end;
 154         int length;
 155         FILE* setxkbmap;
 156         char buffer[1024];
 157         char* keymap = NULL;
 158
 159         /* this tells us about the current XKB configuration, if XKB is available */
 160         setxkbmap = popen("setxkbmap -print", "r");
 161
 162         if (!setxkbmap)
 163                 return NULL;
 164
 165         while (fgets(buffer, sizeof(buffer), setxkbmap) != NULL)
 166         {
 167                 /* the line with xkb_keycodes is what interests us */
 168                 pch = strstr(buffer, "xkb_keycodes");
 169
 170                 if (pch != NULL)
 171                 {
 172                         pch = strstr(pch, "include");
 173
 174                         if (pch != NULL)
 175                         {
 176                                 /* check for " " delimiter presence */
 177                                 if ((beg = strchr(pch, '"')) == NULL)
 178                                         break;
 179                                 else
 180                                         beg++;
 181
 182                                 if ((pch = strchr(beg + 1, '"')) == NULL)
 183                                         break;
 184
 185                                 end = strcspn(beg + 1, "\"") + beg + 1;
 186                                 *end = '\0';
 187
 188                                 length = (end - beg);
 189                                 keymap = (char*) malloc(length + 1);
 190                                 if (keymap) {
 191                                         strncpy(keymap, beg, length);
 192                                         keymap[length] = '\0';
 193                                 }
 194
 195                                 break;
 196                         }
 197                 }
 198         }
 199
 200         pclose(setxkbmap);
 201
 202         return keymap;
 203 }