Relocate and refactor overview mode files.

ash/wm/overview/window_selector_window.cc

Index: ash/wm/overview/window_selector_window.cc
diff --git a/ash/wm/overview/window_selector_window.cc b/ash/wm/overview/window_selector_window.cc
new file mode 100644
index 0000000000000000000000000000000000000000..179490b0d91738a002c931fbd9d8e3cfa5a0237e
--- /dev/null
+++ b/ash/wm/overview/window_selector_window.cc
@@ -0,0 +1,240 @@
+
+// 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()) {
+  if (minimized_)
+    window_->Show();
+}
+
+WindowSelectorWindow::~WindowSelectorWindow() {
+  if (window_) {
+    WindowSelectorAnimationSettings animation_settings(window_);
+    gfx::Transform transform;
+    window_->SetTransform(original_transform_);
+    if (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);
+}
+
+void WindowSelectorWindow::RestoreWindowOnExit() {
+  minimized_ = false;
+  original_transform_ = gfx::Transform();
+}
+
+void WindowSelectorWindow::OnWindowDestroyed() {
+  window_ = NULL;
+}
+
+void WindowSelectorWindow::TransformToFitBounds(
+    aura::RootWindow* root_window,
+    const gfx::Rect& target_bounds) {
+  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);
+}
+
+}  // namespace ash