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// Copyright (c) 2012 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/aura/env.h"
#include "base/command_line.h"
#include "ui/aura/client/screen_position_client.h"
#include "ui/aura/env_observer.h"
#include "ui/aura/event_filter.h"
#include "ui/aura/root_window_host.h"
#include "ui/aura/window.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/compositor_switches.h"
#if defined(USE_X11)
#include "base/message_pump_aurax11.h"
#endif
namespace aura {
// static
Env* Env::instance_ = NULL;
////////////////////////////////////////////////////////////////////////////////
// Env, public:
Env::Env()
: mouse_button_flags_(0),
is_cursor_hidden_(false),
is_touch_down_(false),
render_white_bg_(true),
stacking_client_(NULL) {
}
Env::~Env() {
#if defined(USE_X11)
base::MessagePumpAuraX11::Current()->RemoveObserver(
&device_list_updater_aurax11_);
#endif
ui::Compositor::Terminate();
}
// static
Env* Env::GetInstance() {
if (!instance_) {
instance_ = new Env;
instance_->Init();
}
return instance_;
}
// static
void Env::DeleteInstance() {
delete instance_;
instance_ = NULL;
}
void Env::AddObserver(EnvObserver* observer) {
observers_.AddObserver(observer);
}
void Env::RemoveObserver(EnvObserver* observer) {
observers_.RemoveObserver(observer);
}
void Env::SetLastMouseLocation(const Window& window,
const gfx::Point& location_in_root) {
last_mouse_location_ = location_in_root;
client::ScreenPositionClient* client =
client::GetScreenPositionClient(window.GetRootWindow());
if (client)
client->ConvertPointToScreen(&window, &last_mouse_location_);
}
void Env::SetCursorShown(bool cursor_shown) {
if (cursor_shown) {
// Protect against restoring a position that hadn't been saved.
if (is_cursor_hidden_)
last_mouse_location_ = hidden_cursor_location_;
is_cursor_hidden_ = false;
} else {
hidden_cursor_location_ = last_mouse_location_;
last_mouse_location_ = gfx::Point(-10000, -10000);
is_cursor_hidden_ = true;
}
}
#if !defined(OS_MACOSX)
MessageLoop::Dispatcher* Env::GetDispatcher() {
#if defined(USE_X11)
return base::MessagePumpAuraX11::Current();
#else
return dispatcher_.get();
#endif
}
#endif
////////////////////////////////////////////////////////////////////////////////
// Env, private:
void Env::Init() {
#if !defined(USE_X11)
dispatcher_.reset(CreateDispatcher());
#endif
#if defined(USE_X11)
// We can't do this with a root window listener because XI_HierarchyChanged
// messages don't have a target window.
base::MessagePumpAuraX11::Current()->AddObserver(
&device_list_updater_aurax11_);
#endif
ui::Compositor::Initialize(
CommandLine::ForCurrentProcess()->HasSwitch(
switches::kUIEnableThreadedCompositing));
}
void Env::NotifyWindowInitialized(Window* window) {
FOR_EACH_OBSERVER(EnvObserver, observers_, OnWindowInitialized(window));
}
////////////////////////////////////////////////////////////////////////////////
// Env, ui::EventTarget implementation:
bool Env::CanAcceptEvents() {
return true;
}
ui::EventTarget* Env::GetParentTarget() {
return NULL;
}
} // namespace aura
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