Add panels as a single group of windows per display for overview window cycling.

ash/wm/overview/window_selector_window.cc

 // 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/window_selector_window.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/compositor/scoped_layer_animation_settings.h"
-#include "ui/gfx/display.h"
-#include "ui/gfx/interpolated_transform.h"
-#include "ui/gfx/transform_util.h"
-#include "ui/views/corewm/shadow_types.h"
-#include "ui/views/corewm/window_animations.h"
-#include "ui/views/corewm/window_util.h"
-#include "ui/views/widget/widget.h"
 
 namespace ash {
 
-namespace {
-
-const int kOverviewWindowTransitionMilliseconds = 100;
-
-// Creates a copy of |window| with |recreated_layer| in the |target_root|.
-views::Widget* CreateCopyOfWindow(aura::RootWindow* target_root,
-                                  aura::Window* src_window,
-                                  ui::Layer* recreated_layer) {
-  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->Show();
-  return widget;
-}
-
-// 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);
-
-  virtual void OnLayerAnimationEnded(
-      ui::LayerAnimationSequence* sequence) OVERRIDE;
-  virtual void OnLayerAnimationAborted(
-      ui::LayerAnimationSequence* sequence) OVERRIDE;
-  virtual void OnLayerAnimationScheduled(
-      ui::LayerAnimationSequence* sequence) OVERRIDE;
-
- protected:
-  virtual ~CleanupWidgetAfterAnimationObserver();
-
- private:
-  views::Widget* widget_;
-  ui::Layer* layer_;
-
-  DISALLOW_COPY_AND_ASSIGN(CleanupWidgetAfterAnimationObserver);
-};
-
-CleanupWidgetAfterAnimationObserver::CleanupWidgetAfterAnimationObserver(
-        views::Widget* widget,
-        ui::Layer* layer)
-    : widget_(widget),
-      layer_(layer) {
-  widget_->GetNativeWindow()->layer()->GetAnimator()->AddObserver(this);
-}
-
-void CleanupWidgetAfterAnimationObserver::OnLayerAnimationEnded(
-    ui::LayerAnimationSequence* sequence) {
-  delete this;
-}
-
-void CleanupWidgetAfterAnimationObserver::OnLayerAnimationAborted(
-    ui::LayerAnimationSequence* sequence) {
-  delete this;
-}
-
-void CleanupWidgetAfterAnimationObserver::OnLayerAnimationScheduled(
-    ui::LayerAnimationSequence* sequence) {
-}
-
-CleanupWidgetAfterAnimationObserver::~CleanupWidgetAfterAnimationObserver() {
-  widget_->GetNativeWindow()->layer()->GetAnimator()->RemoveObserver(this);
-  widget_->Close();
-  widget_ = NULL;
-  if (layer_) {
-    views::corewm::DeepDeleteLayers(layer_);
-    layer_ = NULL;
-  }
-}
-
-// The animation settings used for window selector animations.
-class WindowSelectorAnimationSettings
-    : public ui::ScopedLayerAnimationSettings {
- public:
-  WindowSelectorAnimationSettings(aura::Window* window) :
-      ui::ScopedLayerAnimationSettings(window->layer()->GetAnimator()) {
-    SetPreemptionStrategy(
-        ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
-    SetTransitionDuration(base::TimeDelta::FromMilliseconds(
-        kOverviewWindowTransitionMilliseconds));
-  }
-
-  virtual ~WindowSelectorAnimationSettings() {
-  }
-};
-
-}  // namespace
-
 WindowSelectorWindow::WindowSelectorWindow(aura::Window* window)
-    : window_(window),
-      window_copy_(NULL),
-      layer_(NULL),
-      minimized_(window->GetProperty(aura::client::kShowStateKey) ==
-                 ui::SHOW_STATE_MINIMIZED),
-      original_transform_(window->layer()->GetTargetTransform()) {
+    : transform_window_(window) {
 }
 
 WindowSelectorWindow::~WindowSelectorWindow() {
-  if (window_) {
-    WindowSelectorAnimationSettings animation_settings(window_);
-    gfx::Transform transform;
-    window_->SetTransform(original_transform_);
-    if (minimized_ && window_->GetProperty(aura::client::kShowStateKey) !=
-        ui::SHOW_STATE_MINIMIZED) {
-      // Setting opacity 0 and visible false ensures that the property change
-      // to SHOW_STATE_MINIMIZED will not animate the window from its original
-      // bounds to the minimized position.
-      window_->layer()->SetOpacity(0);
-      window_->layer()->SetVisible(false);
-      window_->SetProperty(aura::client::kShowStateKey,
-                           ui::SHOW_STATE_MINIMIZED);
-    }
-  }
-  // If a copy of the window was created, clean it up.
-  if (window_copy_) {
-    if (window_) {
-      // If the initial window wasn't destroyed, the copy needs to be animated
-      // out. CleanupWidgetAfterAnimationObserver will destroy the widget and
-      // layer after the animation is complete.
-      new CleanupWidgetAfterAnimationObserver(window_copy_, layer_);
-      WindowSelectorAnimationSettings animation_settings(
-          window_copy_->GetNativeWindow());
-      window_copy_->GetNativeWindow()->SetTransform(original_transform_);
-    } else {
-      window_copy_->Close();
-      if (layer_)
-        views::corewm::DeepDeleteLayers(layer_);
-    }
-    window_copy_ = NULL;
-    layer_ = NULL;
-  }
 }
 
-bool WindowSelectorWindow::Contains(const aura::Window* window) const {
-  if (window_copy_ && window_copy_->GetNativeWindow()->Contains(window))
-    return true;
-  return window_->Contains(window);
+const aura::RootWindow* WindowSelectorWindow::GetRootWindow() const {
+  return transform_window_.window()->GetRootWindow();
 }
 
-void WindowSelectorWindow::RestoreWindowOnExit() {
-  minimized_ = false;
-  original_transform_ = gfx::Transform();
+aura::Window* WindowSelectorWindow::TargetedWindow(
+    const aura::Window* target) const {
+  if (transform_window_.Contains(target))
+    return transform_window_.window();
+  return NULL;
 }
 
-void WindowSelectorWindow::OnWindowDestroyed() {
-  window_ = NULL;
+void WindowSelectorWindow::RestoreWindowOnExit(aura::Window* window) {
+  transform_window_.RestoreWindowOnExit();
 }
 
-void WindowSelectorWindow::TransformToFitBounds(
-    aura::RootWindow* root_window,
-    const gfx::Rect& target_bounds) {
-  if (minimized_ && window_->GetProperty(aura::client::kShowStateKey) ==
-      ui::SHOW_STATE_MINIMIZED) {
-    window_->Show();
-  }
-  fit_bounds_ = target_bounds;
-  const gfx::Rect bounds = window_->GetBoundsInScreen();
-  float scale = std::min(1.0f,
-      std::min(static_cast<float>(target_bounds.width()) / bounds.width(),
-               static_cast<float>(target_bounds.height()) / bounds.height()));
-  gfx::Transform transform;
-  gfx::Vector2d offset(
-      0.5 * (target_bounds.width() - scale * bounds.width()),
-      0.5 * (target_bounds.height() - scale * bounds.height()));
-  transform.Translate(target_bounds.x() - bounds.x() + offset.x(),
-                      target_bounds.y() - bounds.y() + offset.y());
-  transform.Scale(scale, scale);
-  if (root_window != window_->GetRootWindow()) {
-    if (!window_copy_) {
-      DCHECK(!layer_);
-      layer_ = views::corewm::RecreateWindowLayers(window_, true);
-      window_copy_ = CreateCopyOfWindow(root_window, window_, layer_);
-    }
-    WindowSelectorAnimationSettings animation_settings(
-        window_copy_->GetNativeWindow());
-    window_copy_->GetNativeWindow()->SetTransform(transform);
-  }
-  WindowSelectorAnimationSettings animation_settings(window_);
-  window_->SetTransform(transform);
+aura::Window* WindowSelectorWindow::SelectionWindow() const {
+  return transform_window_.window();
+}
+
+void WindowSelectorWindow::RemoveWindow(const aura::Window* window) {
+  DCHECK_EQ(transform_window_.window(), window);
+  transform_window_.OnWindowDestroyed();
+}
+
+bool WindowSelectorWindow::empty() const {
+  return transform_window_.window() == NULL;
+}
+
+void WindowSelectorWindow::SetItemBounds(aura::RootWindow* root_window,
+                                         const gfx::Rect& target_bounds) {
+  gfx::Rect bounding_rect = transform_window_.window()->GetBoundsInScreen();
+  transform_window_.SetTransform(root_window,
+      ScopedTransformOverviewWindow::GetTransformForRectPreservingAspectRatio(
+          transform_window_.window()->GetBoundsInScreen(), target_bounds));
 }
 
 }  // namespace ash