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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 "base/message_loop/message_pump_dispatcher.h"
#include "ui/aura/env_observer.h"
#include "ui/aura/input_state_lookup.h"
#include "ui/aura/window.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/compositor_switches.h"
#include "ui/events/event_target_iterator.h"
#if defined(USE_X11)
#include "base/message_loop/message_pump_x11.h"
#endif
namespace aura {
// static
Env* Env::instance_ = NULL;
////////////////////////////////////////////////////////////////////////////////
// Env, public:
Env::Env()
: mouse_button_flags_(0),
is_touch_down_(false),
input_state_lookup_(InputStateLookup::Create().Pass()) {
}
Env::~Env() {
#if defined(USE_X11)
base::MessagePumpX11::Current()->RemoveObserver(
&device_list_updater_aurax11_);
#endif
FOR_EACH_OBSERVER(EnvObserver, observers_, OnWillDestroyEnv());
ui::Compositor::Terminate();
}
//static
void Env::CreateInstance() {
if (!instance_) {
instance_ = new Env;
instance_->Init();
}
}
// static
Env* Env::GetInstance() {
DCHECK(instance_) << "Env::CreateInstance must be called before getting "
"the instance of Env.";
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);
}
bool Env::IsMouseButtonDown() const {
return input_state_lookup_.get() ? input_state_lookup_->IsMouseButtonDown() :
mouse_button_flags_ != 0;
}
base::MessagePumpDispatcher* Env::GetDispatcher() {
#if defined(USE_X11)
return base::MessagePumpX11::Current();
#else
return dispatcher_.get();
#endif
}
void Env::RootWindowActivated(RootWindow* root_window) {
FOR_EACH_OBSERVER(EnvObserver, observers_,
OnRootWindowActivated(root_window));
}
////////////////////////////////////////////////////////////////////////////////
// Env, private:
void Env::Init() {
#if !defined(OS_MACOSX) && !defined(OS_ANDROID) && !defined(USE_X11) && \
!defined(USE_OZONE)
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::MessagePumpX11::Current()->AddObserver(
&device_list_updater_aurax11_);
#endif
ui::Compositor::Initialize();
}
void Env::NotifyWindowInitialized(Window* window) {
FOR_EACH_OBSERVER(EnvObserver, observers_, OnWindowInitialized(window));
}
void Env::NotifyRootWindowInitialized(RootWindow* root_window) {
FOR_EACH_OBSERVER(EnvObserver,
observers_,
OnRootWindowInitialized(root_window));
}
////////////////////////////////////////////////////////////////////////////////
// Env, ui::EventTarget implementation:
bool Env::CanAcceptEvent(const ui::Event& event) {
return true;
}
ui::EventTarget* Env::GetParentTarget() {
return NULL;
}
scoped_ptr<ui::EventTargetIterator> Env::GetChildIterator() const {
return scoped_ptr<ui::EventTargetIterator>();
}
ui::EventTargeter* Env::GetEventTargeter() {
NOTREACHED();
return NULL;
}
} // namespace aura
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