ui/x_keymap.c

   1 /*
   2  * QEMU X11 keymaps
   3  *
   4  * Copyright (C) 2009-2010 Daniel P. Berrange <dan@berrange.com>
   5  * Copyright (C) 2017 Red Hat, Inc
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU Lesser General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include "qemu/osdep.h"
  13
  14 #include "x_keymap.h"
  15 #include "trace.h"
  16 #include "qemu/notify.h"
  17 #include "ui/input.h"
  18
  19 #include <X11/XKBlib.h>
  20
  21 static gboolean check_for_xwin(Display *dpy)
  22 {
  23     const char *vendor = ServerVendor(dpy);
  24
  25     trace_xkeymap_vendor(vendor);
  26
  27     if (strstr(vendor, "Cygwin/X")) {
  28         return TRUE;
  29     }
  30
  31     return FALSE;
  32 }
  33
  34 static gboolean check_for_xquartz(Display *dpy)
  35 {
  36     int nextensions;
  37     int i;
  38     gboolean match = FALSE;
  39     char **extensions = XListExtensions(dpy, &nextensions);
  40     for (i = 0 ; extensions != NULL && i < nextensions ; i++) {
  41         trace_xkeymap_extension(extensions[i]);
  42         if (strcmp(extensions[i], "Apple-WM") == 0 ||
  43             strcmp(extensions[i], "Apple-DRI") == 0) {
  44             match = TRUE;
  45         }
  46     }
  47     if (extensions) {
  48         XFreeExtensionList(extensions);
  49     }
  50
  51     return match;
  52 }
  53
  54 const guint16 *qemu_xkeymap_mapping_table(Display *dpy, size_t *maplen)
  55 {
  56     XkbDescPtr desc;
  57     const gchar *keycodes = NULL;
  58
  59     /* There is no easy way to determine what X11 server
  60      * and platform & keyboard driver is in use. Thus we
  61      * do best guess heuristics.
  62      *
  63      * This will need more work for people with other
  64      * X servers..... patches welcomed.
  65      */
  66
  67     desc = XkbGetMap(dpy,
  68                      XkbGBN_AllComponentsMask,
  69                      XkbUseCoreKbd);
  70     if (desc) {
  71         if (XkbGetNames(dpy, XkbKeycodesNameMask, desc) == Success) {
  72             keycodes = XGetAtomName (dpy, desc->names->keycodes);
  73             if (!keycodes) {
  74                 g_warning("could not lookup keycode name");
  75             } else {
  76                 trace_xkeymap_keycodes(keycodes);
  77             }
  78         }
  79         XkbFreeKeyboard(desc, XkbGBN_AllComponentsMask, True);
  80     }
  81
  82     if (check_for_xwin(dpy)) {
  83         trace_xkeymap_keymap("xwin");
  84         *maplen = qemu_input_map_xorgxwin_to_qcode_len;
  85         return qemu_input_map_xorgxwin_to_qcode;
  86     } else if (check_for_xquartz(dpy)) {
  87         trace_xkeymap_keymap("xquartz");
  88         *maplen = qemu_input_map_xorgxquartz_to_qcode_len;
  89         return qemu_input_map_xorgxquartz_to_qcode;
  90     } else if (keycodes && g_str_has_prefix(keycodes, "evdev")) {
  91         trace_xkeymap_keymap("evdev");
  92         *maplen = qemu_input_map_xorgevdev_to_qcode_len;
  93         return qemu_input_map_xorgevdev_to_qcode;
  94     } else if (keycodes && g_str_has_prefix(keycodes, "xfree86")) {
  95         trace_xkeymap_keymap("kbd");
  96         *maplen = qemu_input_map_xorgkbd_to_qcode_len;
  97         return qemu_input_map_xorgkbd_to_qcode;
  98     } else {
  99         trace_xkeymap_keymap("NULL");
 100         g_warning("Unknown X11 keycode mapping '%s'.\n"
 101                   "Please report to qemu-devel@nongnu.org\n"
 102                   "including the following information:\n"
 103                   "\n"
 104                   "  - Operating system\n"
 105                   "  - X11 Server\n"
 106                   "  - xprop -root\n"
 107                   "  - xdpyinfo\n",
 108                   keycodes ? keycodes : "<null>");
 109         return NULL;
 110     }
 111 }