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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/lazy_instance.h"
#include "base/memory/ptr_util.h"
#include "base/threading/thread_local.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/client/focus_client.h"
#include "ui/aura/env_observer.h"
#include "ui/aura/input_state_lookup.h"
#include "ui/aura/mus/mus_types.h"
#include "ui/aura/mus/window_port_mus.h"
#include "ui/aura/mus/window_tree_client.h"
#include "ui/aura/window.h"
#include "ui/aura/window_observer.h"
#include "ui/aura/window_port_local.h"
#include "ui/events/event_target_iterator.h"
#include "ui/events/platform/platform_event_source.h"
#if defined(USE_OZONE)
#include "ui/ozone/public/ozone_platform.h"
#endif
namespace aura {
namespace {
// Env is thread local so that aura may be used on multiple threads.
base::LazyInstance<base::ThreadLocalPointer<Env> >::Leaky lazy_tls_ptr =
LAZY_INSTANCE_INITIALIZER;
// Returns true if running inside of mus. Checks for mojo specific flag.
bool RunningInsideMus() {
return base::CommandLine::ForCurrentProcess()->HasSwitch(
"primordial-pipe-token");
}
} // namespace
// Observes destruction and changes of the FocusClient for a window.
// ActiveFocusClientWindowObserver is created for the window the FocusClient is
// associated with.
class Env::ActiveFocusClientWindowObserver : public WindowObserver {
public:
explicit ActiveFocusClientWindowObserver(Window* window) : window_(window) {
window_->AddObserver(this);
}
~ActiveFocusClientWindowObserver() override { window_->RemoveObserver(this); }
// WindowObserver:
void OnWindowDestroying(Window* window) override {
Env::GetInstance()->OnActiveFocusClientWindowDestroying();
}
void OnWindowPropertyChanged(Window* window,
const void* key,
intptr_t old) override {
if (key != client::kFocusClientKey)
return;
// Assume if the focus client changes the window is being destroyed.
Env::GetInstance()->OnActiveFocusClientWindowDestroying();
}
private:
Window* window_;
DISALLOW_COPY_AND_ASSIGN(ActiveFocusClientWindowObserver);
};
////////////////////////////////////////////////////////////////////////////////
// Env, public:
Env::~Env() {
for (EnvObserver& observer : observers_)
observer.OnWillDestroyEnv();
DCHECK_EQ(this, lazy_tls_ptr.Pointer()->Get());
lazy_tls_ptr.Pointer()->Set(NULL);
}
// static
std::unique_ptr<Env> Env::CreateInstance(Mode mode) {
DCHECK(!lazy_tls_ptr.Pointer()->Get());
std::unique_ptr<Env> env(new Env(mode));
env->Init();
return env;
}
// static
Env* Env::GetInstance() {
Env* env = lazy_tls_ptr.Pointer()->Get();
DCHECK(env) << "Env::CreateInstance must be called before getting the "
"instance of Env.";
return env;
}
// static
Env* Env::GetInstanceDontCreate() {
return lazy_tls_ptr.Pointer()->Get();
}
std::unique_ptr<WindowPort> Env::CreateWindowPort(Window* window) {
if (mode_ == Mode::LOCAL)
return base::MakeUnique<WindowPortLocal>(window);
DCHECK(window_tree_client_);
WindowMusType window_mus_type =
window->GetProperty(aura::client::kTopLevelWindowInWM)
? WindowMusType::TOP_LEVEL_IN_WM
: WindowMusType::LOCAL;
// Use LOCAL as all other cases are created by WindowTreeClient explicitly.
return base::MakeUnique<WindowPortMus>(window_tree_client_, window_mus_type);
}
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;
}
const gfx::Point& Env::last_mouse_location() const {
if (mode_ == Mode::LOCAL || always_use_last_mouse_location_ ||
!get_last_mouse_location_from_mus_) {
return last_mouse_location_;
}
// Some tests may not install a WindowTreeClient, and we allow multiple
// WindowTreeClients for the case of multiple connections.
if (window_tree_client_)
last_mouse_location_ = window_tree_client_->GetCursorScreenPoint();
return last_mouse_location_;
}
void Env::SetWindowTreeClient(WindowTreeClient* window_tree_client) {
// The WindowTreeClient should only be set once. Test code may need to change
// the value after the fact, to do that use EnvTestHelper.
DCHECK(!window_tree_client_);
window_tree_client_ = window_tree_client;
}
void Env::SetActiveFocusClient(client::FocusClient* focus_client,
Window* focus_client_root) {
if (focus_client == active_focus_client_ &&
focus_client_root == active_focus_client_root_) {
return;
}
active_focus_client_window_observer_.reset();
active_focus_client_ = focus_client;
active_focus_client_root_ = focus_client_root;
if (focus_client_root) {
active_focus_client_window_observer_ =
base::MakeUnique<ActiveFocusClientWindowObserver>(focus_client_root);
}
for (EnvObserver& observer : observers_)
observer.OnActiveFocusClientChanged(focus_client, focus_client_root);
}
////////////////////////////////////////////////////////////////////////////////
// Env, private:
Env::Env(Mode mode)
: mode_(mode),
mouse_button_flags_(0),
is_touch_down_(false),
get_last_mouse_location_from_mus_(mode_ == Mode::MUS),
input_state_lookup_(InputStateLookup::Create()),
context_factory_(nullptr),
context_factory_private_(nullptr) {
DCHECK(lazy_tls_ptr.Pointer()->Get() == NULL);
lazy_tls_ptr.Pointer()->Set(this);
}
void Env::Init() {
if (RunningInsideMus())
return;
#if defined(USE_OZONE)
// The ozone platform can provide its own event source. So initialize the
// platform before creating the default event source. If running inside mus
// let the mus process initialize ozone instead.
ui::OzonePlatform::InitializeForUI();
#endif
if (!ui::PlatformEventSource::GetInstance())
event_source_ = ui::PlatformEventSource::CreateDefault();
}
void Env::NotifyWindowInitialized(Window* window) {
for (EnvObserver& observer : observers_)
observer.OnWindowInitialized(window);
}
void Env::NotifyHostInitialized(WindowTreeHost* host) {
for (EnvObserver& observer : observers_)
observer.OnHostInitialized(host);
}
void Env::NotifyHostActivated(WindowTreeHost* host) {
for (EnvObserver& observer : observers_)
observer.OnHostActivated(host);
}
void Env::OnActiveFocusClientWindowDestroying() {
SetActiveFocusClient(nullptr, nullptr);
}
////////////////////////////////////////////////////////////////////////////////
// Env, ui::EventTarget implementation:
bool Env::CanAcceptEvent(const ui::Event& event) {
return true;
}
ui::EventTarget* Env::GetParentTarget() {
return NULL;
}
std::unique_ptr<ui::EventTargetIterator> Env::GetChildIterator() const {
return nullptr;
}
ui::EventTargeter* Env::GetEventTargeter() {
NOTREACHED();
return NULL;
}
} // namespace aura
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