ash/wm/workspace_controller.cc

// Copyright (c) 2012 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/workspace_controller.h"

#include <utility>

#include "ash/public/cpp/shell_window_ids.h"
#include "ash/root_window_controller.h"
#include "ash/shelf/wm_shelf.h"
#include "ash/shell_port.h"
#include "ash/wm/fullscreen_window_finder.h"
#include "ash/wm/window_state.h"
#include "ash/wm/window_state_aura.h"
#include "ash/wm/wm_window_animations.h"
#include "ash/wm/workspace/workspace_event_handler.h"
#include "ash/wm/workspace/workspace_layout_manager.h"
#include "ash/wm/workspace/workspace_layout_manager_backdrop_delegate.h"
#include "ash/wm_window.h"
#include "base/memory/ptr_util.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/scoped_layer_animation_settings.h"

namespace ash {
namespace {

// Amount of time to pause before animating anything. Only used during initial
// animation (when logging in).
const int kInitialPauseTimeMS = 750;

// The duration of the animation that occurs on first login.
const int kInitialAnimationDurationMS = 200;

}  // namespace

WorkspaceController::WorkspaceController(WmWindow* viewport)
    : viewport_(viewport),
      event_handler_(ShellPort::Get()->CreateWorkspaceEventHandler(viewport)),
      layout_manager_(new WorkspaceLayoutManager(viewport)) {
  viewport_->aura_window()->AddObserver(this);
  viewport_->SetVisibilityAnimationTransition(::wm::ANIMATE_NONE);
  viewport_->SetLayoutManager(base::WrapUnique(layout_manager_));
}

WorkspaceController::~WorkspaceController() {
  if (!viewport_)
    return;

  viewport_->aura_window()->RemoveObserver(this);
  viewport_->SetLayoutManager(nullptr);
}

wm::WorkspaceWindowState WorkspaceController::GetWindowState() const {
  if (!viewport_ || !viewport_->GetRootWindowController()->HasShelf())
    return wm::WORKSPACE_WINDOW_STATE_DEFAULT;

  const WmWindow* fullscreen = wm::GetWindowForFullscreenMode(viewport_);
  if (fullscreen && !fullscreen->GetWindowState()->ignored_by_shelf())
    return wm::WORKSPACE_WINDOW_STATE_FULL_SCREEN;

  const gfx::Rect shelf_bounds(WmShelf::ForWindow(viewport_)->GetIdealBounds());
  bool window_overlaps_launcher = false;
  // The default container may contain windows that may overlap the launcher
  // shelf and affect its transparency.
  aura::Window* container =
      viewport_->GetRootWindow()->aura_window()->GetChildById(
          kShellWindowId_DefaultContainer);
  for (aura::Window* window : container->children()) {
    wm::WindowState* window_state = wm::GetWindowState(window);
    if (window_state->ignored_by_shelf() ||
        (window->layer() && !window->layer()->GetTargetVisibility())) {
      continue;
    }
    if (window_state->IsMaximized())
      return wm::WORKSPACE_WINDOW_STATE_MAXIMIZED;
    window_overlaps_launcher |= window->bounds().Intersects(shelf_bounds);
  }

  return window_overlaps_launcher
             ? wm::WORKSPACE_WINDOW_STATE_WINDOW_OVERLAPS_SHELF
             : wm::WORKSPACE_WINDOW_STATE_DEFAULT;
}

void WorkspaceController::DoInitialAnimation() {
  viewport_->Show();

  ui::Layer* layer = viewport_->GetLayer();
  layer->SetOpacity(0.0f);
  SetTransformForScaleAnimation(layer, LAYER_SCALE_ANIMATION_ABOVE);

  // In order for pause to work we need to stop animations.
  layer->GetAnimator()->StopAnimating();

  {
    ui::ScopedLayerAnimationSettings settings(layer->GetAnimator());

    settings.SetPreemptionStrategy(ui::LayerAnimator::ENQUEUE_NEW_ANIMATION);
    layer->GetAnimator()->SchedulePauseForProperties(
        base::TimeDelta::FromMilliseconds(kInitialPauseTimeMS),
        ui::LayerAnimationElement::TRANSFORM |
            ui::LayerAnimationElement::OPACITY |
            ui::LayerAnimationElement::BRIGHTNESS |
            ui::LayerAnimationElement::VISIBILITY);
    settings.SetTweenType(gfx::Tween::EASE_OUT);
    settings.SetTransitionDuration(
        base::TimeDelta::FromMilliseconds(kInitialAnimationDurationMS));
    layer->SetTransform(gfx::Transform());
    layer->SetOpacity(1.0f);
  }
}

void WorkspaceController::SetMaximizeBackdropDelegate(
    std::unique_ptr<WorkspaceLayoutManagerBackdropDelegate> delegate) {
  layout_manager_->SetMaximizeBackdropDelegate(std::move(delegate));
}

void WorkspaceController::OnWindowDestroying(aura::Window* window) {
  DCHECK_EQ(WmWindow::Get(window), viewport_);
  viewport_->aura_window()->RemoveObserver(this);
  viewport_ = nullptr;
  // Destroy |event_handler_| too as it depends upon |window|.
  event_handler_.reset();
  layout_manager_ = nullptr;
}

}  // namespace ash