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// Copyright 2013 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 "ash/wm/overview/scoped_window_copy.h"
#include "ash/screen_ash.h"
#include "ash/shell.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/client/screen_position_client.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/gfx/display.h"
#include "ui/views/corewm/shadow_types.h"
#include "ui/views/corewm/window_util.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace {
// Creates a copy of |window| with |recreated_layer| in the |target_root|.
views::Widget* CreateCopyOfWindow(aura::Window* target_root,
aura::Window* src_window,
ui::Layer* recreated_layer) {
// Save and remove the transform from the layer to later reapply to both the
// source and newly created copy window.
gfx::Transform transform = recreated_layer->transform();
recreated_layer->SetTransform(gfx::Transform());
src_window->SetTransform(transform);
views::Widget* widget = new views::Widget;
views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
params.parent = src_window->parent();
params.can_activate = false;
params.keep_on_top = true;
widget->set_focus_on_creation(false);
widget->Init(params);
widget->SetVisibilityChangedAnimationsEnabled(false);
std::string name = src_window->name() + " (Copy)";
widget->GetNativeWindow()->SetName(name);
views::corewm::SetShadowType(widget->GetNativeWindow(),
views::corewm::SHADOW_TYPE_RECTANGULAR);
// Set the bounds in the target root window.
gfx::Display target_display =
Shell::GetScreen()->GetDisplayNearestWindow(target_root);
aura::client::ScreenPositionClient* screen_position_client =
aura::client::GetScreenPositionClient(src_window->GetRootWindow());
if (screen_position_client && target_display.is_valid()) {
screen_position_client->SetBounds(widget->GetNativeWindow(),
src_window->GetBoundsInScreen(), target_display);
} else {
widget->SetBounds(src_window->GetBoundsInScreen());
}
widget->StackAbove(src_window);
// Move the |recreated_layer| to the newly created window.
recreated_layer->set_delegate(src_window->layer()->delegate());
gfx::Rect layer_bounds = recreated_layer->bounds();
layer_bounds.set_origin(gfx::Point(0, 0));
recreated_layer->SetBounds(layer_bounds);
recreated_layer->SetVisible(false);
recreated_layer->parent()->Remove(recreated_layer);
aura::Window* window = widget->GetNativeWindow();
recreated_layer->SetVisible(true);
window->layer()->Add(recreated_layer);
window->layer()->StackAtTop(recreated_layer);
window->layer()->SetOpacity(1);
window->SetTransform(transform);
window->Show();
return widget;
}
} // namespace
// An observer which closes the widget and deletes the layer after an
// animation finishes.
class CleanupWidgetAfterAnimationObserver : public ui::LayerAnimationObserver {
public:
CleanupWidgetAfterAnimationObserver(views::Widget* widget, ui::Layer* layer);
// Takes ownership of the widget. At this point the class will delete itself
// and clean up the layer when there are no pending animations.
void TakeOwnershipOfWidget();
// ui::LayerAnimationObserver:
virtual void OnLayerAnimationEnded(
ui::LayerAnimationSequence* sequence) OVERRIDE;
virtual void OnLayerAnimationAborted(
ui::LayerAnimationSequence* sequence) OVERRIDE;
virtual void OnLayerAnimationScheduled(
ui::LayerAnimationSequence* sequence) OVERRIDE;
private:
virtual ~CleanupWidgetAfterAnimationObserver();
// If the necessary conditions have been satisfied to destruct this
// class, deletes itself and cleans up the widget and layer.
void MaybeDestruct();
views::Widget* widget_;
ui::Layer* layer_;
bool owns_widget_;
int pending_animations_;
DISALLOW_COPY_AND_ASSIGN(CleanupWidgetAfterAnimationObserver);
};
CleanupWidgetAfterAnimationObserver::CleanupWidgetAfterAnimationObserver(
views::Widget* widget,
ui::Layer* layer)
: widget_(widget),
layer_(layer),
owns_widget_(false),
pending_animations_(0) {
widget_->GetNativeWindow()->layer()->GetAnimator()->AddObserver(this);
}
void CleanupWidgetAfterAnimationObserver::TakeOwnershipOfWidget() {
owns_widget_ = true;
MaybeDestruct();
}
void CleanupWidgetAfterAnimationObserver::OnLayerAnimationEnded(
ui::LayerAnimationSequence* sequence) {
pending_animations_--;
MaybeDestruct();
}
void CleanupWidgetAfterAnimationObserver::OnLayerAnimationAborted(
ui::LayerAnimationSequence* sequence) {
pending_animations_--;
MaybeDestruct();
}
void CleanupWidgetAfterAnimationObserver::OnLayerAnimationScheduled(
ui::LayerAnimationSequence* sequence) {
pending_animations_++;
}
CleanupWidgetAfterAnimationObserver::~CleanupWidgetAfterAnimationObserver() {
widget_->GetNativeWindow()->layer()->GetAnimator()->RemoveObserver(this);
widget_->Close();
widget_ = NULL;
if (layer_) {
views::corewm::DeepDeleteLayers(layer_);
layer_ = NULL;
}
}
void CleanupWidgetAfterAnimationObserver::MaybeDestruct() {
if (pending_animations_ || !owns_widget_)
return;
delete this;
}
ScopedWindowCopy::ScopedWindowCopy(aura::Window* target_root,
aura::Window* src_window) {
layer_ = views::corewm::RecreateWindowLayers(src_window, true);
widget_ = CreateCopyOfWindow(target_root, src_window, layer_);
cleanup_observer_ = new CleanupWidgetAfterAnimationObserver(widget_, layer_);
}
ScopedWindowCopy::~ScopedWindowCopy() {
// The cleanup observer will delete itself and the window when any pending
// animations have completed.
cleanup_observer_->TakeOwnershipOfWidget();
}
aura::Window* ScopedWindowCopy::GetWindow() {
return widget_->GetNativeWindow();
}
} // namespace ash
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