import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

widget/gtk/nsBidiKeyboard.cpp

@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim:expandtab:shiftwidth=4:tabstop=4:
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "prlink.h"
+
+#include "nsBidiKeyboard.h"
+#include <gtk/gtk.h>
+
+NS_IMPL_ISUPPORTS(nsBidiKeyboard, nsIBidiKeyboard)
+
+nsBidiKeyboard::nsBidiKeyboard()
+{
+    Reset();
+}
+
+NS_IMETHODIMP
+nsBidiKeyboard::Reset()
+{
+    // NB: The default keymap can be null (e.g. in xpcshell). In that case,
+    // simply assume that we don't have bidi keyboards.
+    mHaveBidiKeyboards = false;
+
+    GdkDisplay *display = gdk_display_get_default();
+    if (!display)
+        return NS_OK;
+
+    GdkKeymap *keymap = gdk_keymap_get_for_display(display);
+    mHaveBidiKeyboards = keymap && gdk_keymap_have_bidi_layouts(keymap);
+    return NS_OK;
+}
+
+nsBidiKeyboard::~nsBidiKeyboard()
+{
+}
+
+NS_IMETHODIMP
+nsBidiKeyboard::IsLangRTL(bool *aIsRTL)
+{
+    if (!mHaveBidiKeyboards)
+        return NS_ERROR_FAILURE;
+
+    *aIsRTL = (gdk_keymap_get_direction(gdk_keymap_get_default()) == PANGO_DIRECTION_RTL);
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP nsBidiKeyboard::GetHaveBidiKeyboards(bool* aResult)
+{
+  // not implemented yet
+  return NS_ERROR_NOT_IMPLEMENTED;
+}