Change overview mode to so that docked panel windows are not grouped together.

ash/wm/overview/scoped_window_copy.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/scoped_window_copy.h"
-
-#include "ash/screen_util.h"
-#include "ash/shell.h"
-#include "ui/aura/client/aura_constants.h"
-#include "ui/aura/client/screen_position_client.h"
-#include "ui/aura/window.h"
-#include "ui/aura/window_event_dispatcher.h"
-#include "ui/compositor/layer_animation_observer.h"
-#include "ui/compositor/layer_tree_owner.h"
-#include "ui/gfx/display.h"
-#include "ui/views/widget/widget.h"
-#include "ui/wm/core/shadow_types.h"
-#include "ui/wm/core/window_util.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.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);
-  ::wm::SetShadowType(widget->GetNativeWindow(),
-                               ::wm::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,
-      scoped_ptr<ui::LayerTreeOwner> layer_owner);
-
-  // 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:
-  void OnLayerAnimationEnded(ui::LayerAnimationSequence* sequence) override;
-  void OnLayerAnimationAborted(ui::LayerAnimationSequence* sequence) override;
-  void OnLayerAnimationScheduled(ui::LayerAnimationSequence* sequence) override;
-
- private:
-  ~CleanupWidgetAfterAnimationObserver() override;
-
-  // 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_;
-  scoped_ptr<ui::LayerTreeOwner> layer_owner_;
-  bool owns_widget_;
-  int pending_animations_;
-
-  DISALLOW_COPY_AND_ASSIGN(CleanupWidgetAfterAnimationObserver);
-};
-
-CleanupWidgetAfterAnimationObserver::CleanupWidgetAfterAnimationObserver(
-        views::Widget* widget,
-        scoped_ptr<ui::LayerTreeOwner> layer_owner)
-    : widget_(widget),
-      layer_owner_(layer_owner.Pass()),
-      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;
-}
-
-void CleanupWidgetAfterAnimationObserver::MaybeDestruct() {
-  if (pending_animations_ || !owns_widget_)
-    return;
-  delete this;
-}
-
-ScopedWindowCopy::ScopedWindowCopy(aura::Window* target_root,
-                                   aura::Window* src_window) {
-  scoped_ptr<ui::LayerTreeOwner> layer_owner =
-      ::wm::RecreateLayers(src_window);
-  widget_ = CreateCopyOfWindow(target_root, src_window, layer_owner->root());
-  cleanup_observer_ =
-      new CleanupWidgetAfterAnimationObserver(widget_, layer_owner.Pass());
-}
-
-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