| // 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 "ui/views/test/x11_property_change_waiter.h" |
| |
| #include <X11/Xlib.h> |
| |
| #include "base/run_loop.h" |
| #include "ui/events/platform/platform_event_source.h" |
| #include "ui/events/platform/scoped_event_dispatcher.h" |
| #include "ui/gfx/x/x11_atom_cache.h" |
| |
| namespace views { |
| |
| X11PropertyChangeWaiter::X11PropertyChangeWaiter(XID window, |
| const char* property) |
| : x_window_(window), |
| property_(property), |
| wait_(true), |
| old_event_mask_(0) { |
| Display* display = gfx::GetXDisplay(); |
| |
| // Ensure that we are listening to PropertyNotify events for |window|. This |
| // is not the case for windows which were not created by |
| // DesktopWindowTreeHostX11. |
| XWindowAttributes attributes; |
| XGetWindowAttributes(display, x_window_, &attributes); |
| old_event_mask_ = attributes.your_event_mask; |
| XSelectInput(display, x_window_, old_event_mask_ | PropertyChangeMask); |
| |
| const char* kAtomsToCache[] = { property, NULL }; |
| atom_cache_.reset(new ui::X11AtomCache(display, kAtomsToCache)); |
| |
| // Override the dispatcher so that we get events before |
| // DesktopWindowTreeHostX11 does. We must do this because |
| // DesktopWindowTreeHostX11 stops propagation. |
| dispatcher_ = ui::PlatformEventSource::GetInstance()-> |
| OverrideDispatcher(this).Pass(); |
| } |
| |
| X11PropertyChangeWaiter::~X11PropertyChangeWaiter() { |
| XSelectInput(gfx::GetXDisplay(), x_window_, old_event_mask_); |
| } |
| |
| void X11PropertyChangeWaiter::Wait() { |
| if (!wait_) |
| return; |
| |
| base::RunLoop run_loop; |
| quit_closure_ = run_loop.QuitClosure(); |
| run_loop.Run(); |
| |
| dispatcher_.reset(); |
| } |
| |
| bool X11PropertyChangeWaiter::ShouldKeepOnWaiting( |
| const ui::PlatformEvent& event) { |
| // Stop waiting once we get a property change. |
| return true; |
| } |
| |
| bool X11PropertyChangeWaiter::CanDispatchEvent(const ui::PlatformEvent& event) { |
| NOTREACHED(); |
| return true; |
| } |
| |
| uint32_t X11PropertyChangeWaiter::DispatchEvent( |
| const ui::PlatformEvent& event) { |
| if (!wait_ || |
| event->type != PropertyNotify || |
| event->xproperty.window != x_window_ || |
| event->xproperty.atom != atom_cache_->GetAtom(property_) || |
| ShouldKeepOnWaiting(event)) { |
| return ui::POST_DISPATCH_PERFORM_DEFAULT; |
| } |
| |
| wait_ = false; |
| if (!quit_closure_.is_null()) |
| quit_closure_.Run(); |
| return ui::POST_DISPATCH_PERFORM_DEFAULT; |
| } |
| |
| } // namespace views |