| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/ui/libgtk2ui/gtk2_event_loop.h" |
| |
| #include <gdk/gdk.h> |
| #include <gdk/gdkx.h> |
| #include <gtk/gtk.h> |
| #include <X11/X.h> |
| |
| #include "base/memory/singleton.h" |
| #include "ui/gfx/x/x11_types.h" |
| |
| namespace libgtk2ui { |
| |
| // static |
| Gtk2EventLoop* Gtk2EventLoop::GetInstance() { |
| return Singleton<Gtk2EventLoop>::get(); |
| } |
| |
| Gtk2EventLoop::Gtk2EventLoop() { |
| gdk_event_handler_set(GdkEventTrampoline, this, NULL); |
| } |
| |
| Gtk2EventLoop::~Gtk2EventLoop() { |
| gdk_event_handler_set(reinterpret_cast<GdkEventFunc>(gtk_main_do_event), |
| NULL, NULL); |
| } |
| |
| // static |
| void Gtk2EventLoop::GdkEventTrampoline(GdkEvent* event, gpointer data) { |
| Gtk2EventLoop* loop = reinterpret_cast<Gtk2EventLoop*>(data); |
| loop->DispatchGdkEvent(event); |
| } |
| |
| void Gtk2EventLoop::DispatchGdkEvent(GdkEvent* gdk_event) { |
| switch (gdk_event->type) { |
| case GDK_KEY_PRESS: |
| case GDK_KEY_RELEASE: |
| ProcessGdkEventKey(gdk_event->key); |
| break; |
| default: |
| break; // Do nothing. |
| } |
| |
| gtk_main_do_event(gdk_event); |
| } |
| |
| void Gtk2EventLoop::ProcessGdkEventKey(const GdkEventKey& gdk_event_key) { |
| // This function translates GdkEventKeys into XKeyEvents and puts them to |
| // the X event queue. |
| // |
| // base::MessagePumpX11 is using the X11 event queue and all key events should |
| // be processed there. However, there are cases(*1) that GdkEventKeys are |
| // created instead of XKeyEvents. In these cases, we have to translate |
| // GdkEventKeys to XKeyEvents and puts them to the X event queue so our main |
| // event loop can handle those key events. |
| // |
| // (*1) At least ibus-gtk in async mode creates a copy of user's key event and |
| // pushes it back to the GDK event queue. In this case, there is no |
| // corresponding key event in the X event queue. So we have to handle this |
| // case. ibus-gtk is used through gtk-immodule to support IMEs. |
| |
| XEvent x_event = {0}; |
| x_event.xkey.type = |
| gdk_event_key.type == GDK_KEY_PRESS ? KeyPress : KeyRelease; |
| x_event.xkey.send_event = gdk_event_key.send_event; |
| x_event.xkey.display = gfx::GetXDisplay(); |
| x_event.xkey.window = GDK_WINDOW_XID(gdk_event_key.window); |
| x_event.xkey.root = DefaultRootWindow(x_event.xkey.display); |
| x_event.xkey.time = gdk_event_key.time; |
| x_event.xkey.state = gdk_event_key.state; |
| x_event.xkey.keycode = gdk_event_key.hardware_keycode; |
| x_event.xkey.same_screen = true; |
| |
| XPutBackEvent(x_event.xkey.display, &x_event); |
| } |
| |
| } // namespace libgtk2ui |