widget/gtk/nsBidiKeyboard.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* vim:expandtab:shiftwidth=4:tabstop=4:
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #include "prlink.h"
   9
  10 #include "nsBidiKeyboard.h"
  11 #include <gtk/gtk.h>
  12
  13 #if (MOZ_WIDGET_GTK == 2)
  14 typedef gboolean (*GdkKeymapHaveBidiLayoutsType)(GdkKeymap *keymap);
  15 static GdkKeymapHaveBidiLayoutsType GdkKeymapHaveBidiLayouts = nullptr;
  16 #endif
  17
  18 NS_IMPL_ISUPPORTS(nsBidiKeyboard, nsIBidiKeyboard)
  19
  20 nsBidiKeyboard::nsBidiKeyboard()
  21 {
  22     Reset();
  23 }
  24
  25 NS_IMETHODIMP
  26 nsBidiKeyboard::Reset()
  27 {
  28 #if (MOZ_WIDGET_GTK == 2)
  29     PRLibrary *gtklib = nullptr;
  30 #if defined(MOZ_X11)
  31     if (!GdkKeymapHaveBidiLayouts) {
  32         GdkKeymapHaveBidiLayouts = (GdkKeymapHaveBidiLayoutsType)
  33             PR_FindFunctionSymbolAndLibrary("gdk_keymap_have_bidi_layouts",
  34                                             &gtklib);
  35         if (gtklib)
  36             PR_UnloadLibrary(gtklib);
  37     }
  38 #endif
  39
  40     mHaveBidiKeyboards = false;
  41     if (GdkKeymapHaveBidiLayouts)
  42         mHaveBidiKeyboards = (*GdkKeymapHaveBidiLayouts)(nullptr);
  43 #else
  44     mHaveBidiKeyboards = gdk_keymap_have_bidi_layouts(gdk_keymap_get_default());
  45 #endif
  46     return NS_OK;
  47 }
  48
  49 nsBidiKeyboard::~nsBidiKeyboard()
  50 {
  51 #if (MOZ_WIDGET_GTK == 2)
  52     GdkKeymapHaveBidiLayouts = nullptr;
  53 #endif
  54 }
  55
  56 NS_IMETHODIMP
  57 nsBidiKeyboard::IsLangRTL(bool *aIsRTL)
  58 {
  59     if (!mHaveBidiKeyboards)
  60         return NS_ERROR_FAILURE;
  61
  62     *aIsRTL = (gdk_keymap_get_direction(gdk_keymap_get_default()) == PANGO_DIRECTION_RTL);
  63
  64     return NS_OK;
  65 }
  66
  67 NS_IMETHODIMP nsBidiKeyboard::GetHaveBidiKeyboards(bool* aResult)
  68 {
  69   // not implemented yet
  70   return NS_ERROR_NOT_IMPLEMENTED;
  71 }