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// 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 "athena/screen/modal_window_controller.h"
#include "athena/screen/public/screen_manager.h"
#include "base/message_loop/message_loop.h"
#include "ui/aura/window.h"
#include "ui/aura/window_property.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
#include "ui/wm/core/window_animations.h"
namespace athena {
namespace {
DEFINE_OWNED_WINDOW_PROPERTY_KEY(ModalWindowController,
kModalWindowControllerKey,
nullptr);
} // namespace
// static
ModalWindowController* ModalWindowController::Get(aura::Window* container) {
ModalWindowController* controller =
container->GetProperty(kModalWindowControllerKey);
CHECK(controller);
return controller;
}
ModalWindowController::ModalWindowController(int priority)
: modal_container_(nullptr),
dimmer_window_(new aura::Window(nullptr)),
dimmed_(false) {
ScreenManager::ContainerParams params("ModalContainer", priority);
params.can_activate_children = true;
params.block_events = true;
modal_container_ = ScreenManager::Get()->CreateContainer(params);
modal_container_->SetProperty(kModalWindowControllerKey, this);
dimmer_window_->SetType(ui::wm::WINDOW_TYPE_NORMAL);
dimmer_window_->Init(aura::WINDOW_LAYER_SOLID_COLOR);
dimmer_window_->layer()->SetColor(SK_ColorBLACK);
dimmer_window_->layer()->SetOpacity(0.0f);
dimmer_window_->Show();
modal_container_->AddChild(dimmer_window_);
modal_container_->AddObserver(this);
UpdateDimmerWindowBounds();
}
ModalWindowController::~ModalWindowController() {
if (modal_container_)
modal_container_->RemoveObserver(this);
}
void ModalWindowController::OnWindowAdded(aura::Window* child) {
DCHECK_NE(child, dimmer_window_);
if (IsChildWindow(child)) {
child->AddObserver(this);
UpdateDimming(nullptr);
}
}
void ModalWindowController::OnWindowVisibilityChanged(aura::Window* window,
bool visible) {
if (IsChildWindow(window))
UpdateDimming(nullptr);
}
void ModalWindowController::OnWindowBoundsChanged(aura::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) {
if (window == modal_container_)
UpdateDimmerWindowBounds();
}
void ModalWindowController::OnWindowDestroyed(aura::Window* window) {
UpdateDimming(window);
}
bool ModalWindowController::IsChildWindow(aura::Window* child) const {
return child->parent() == modal_container_ && child != dimmer_window_;
}
void ModalWindowController::UpdateDimmerWindowBounds() {
gfx::Rect bounds(modal_container_->bounds().size());
dimmer_window_->SetBounds(bounds);
}
void ModalWindowController::UpdateDimming(aura::Window* ignore) {
if (!modal_container_ || !dimmer_window_)
return;
bool should_delete = true;
for (aura::Window* window : modal_container_->children()) {
if (window == dimmer_window_ || window == ignore)
continue;
should_delete = false;
if (window->TargetVisibility()) {
SetDimmed(true);
return;
}
}
SetDimmed(false);
if (should_delete) {
// Remove the container from root so that the container becomes
// invisible, but don't delete it until next event execution
// because the call stack may still have and use the pointer.
modal_container_->RemoveObserver(this);
// Hide the window before removing it, so the focus manager which will run
// in RemoveChild handler can know that this container is no longer
// available.
modal_container_->Hide();
modal_container_->parent()->RemoveChild(modal_container_);
base::MessageLoopForUI::current()->DeleteSoon(FROM_HERE, modal_container_);
modal_container_ = nullptr;
dimmer_window_ = nullptr;
}
}
void ModalWindowController::SetDimmed(bool dimmed) {
const float kDimmedOpacity = 0.4f;
if (!dimmer_window_ || dimmed_ == dimmed)
return;
dimmed_ = dimmed;
const int kDimmAnimationDurationMs = 500;
if (dimmed) {
ui::ScopedLayerAnimationSettings settings(
dimmer_window_->layer()->GetAnimator());
settings.SetTransitionDuration(
base::TimeDelta::FromMilliseconds(kDimmAnimationDurationMs));
dimmer_window_->layer()->SetOpacity(kDimmedOpacity);
} else {
// ScopedHidingAnimationSettings will detach the animating and
// recreate layers for the container so that animation can continue
// even if the container is removed immediately.
wm::ScopedHidingAnimationSettings settings(modal_container_);
settings.layer_animation_settings()->SetTransitionDuration(
base::TimeDelta::FromMilliseconds(kDimmAnimationDurationMs));
modal_container_->layer()->SetOpacity(0.0f);
}
}
} // namespace athena
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