text: /*
   * Copyright (C) 2012 Google Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1.  Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   * 2.  Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_LINK_HIGHLIGHT_IMPL_H_
  #define THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_LINK_HIGHLIGHT_IMPL_H_
  
  #include <memory>
  
  #include "cc/layers/content_layer_client.h"
  #include "third_party/blink/renderer/core/core_export.h"
  #include "third_party/blink/renderer/core/dom/node.h"
  #include "third_party/blink/renderer/platform/animation/compositor_animation.h"
  #include "third_party/blink/renderer/platform/animation/compositor_animation_client.h"
  #include "third_party/blink/renderer/platform/animation/compositor_animation_delegate.h"
  #include "third_party/blink/renderer/platform/graphics/color.h"
  #include "third_party/blink/renderer/platform/graphics/compositor_element_id.h"
  #include "third_party/blink/renderer/platform/graphics/path.h"
  #include "third_party/blink/renderer/platform/heap/persistent.h"
  #include "third_party/blink/renderer/platform/wtf/forward.h"
  
  namespace cc {
  class Layer;
  class PictureLayer;
  }  // namespace cc
  
  namespace blink {
  
  class EffectPaintPropertyNode;
  class GraphicsContext;
  
  class CORE_EXPORT LinkHighlightImpl final : public CompositorAnimationDelegate,
                                              public CompositorAnimationClient {
   public:
    explicit LinkHighlightImpl(Node*);
    ~LinkHighlightImpl() override;
  
    void StartHighlightAnimationIfNeeded();
  
    // CompositorAnimationDelegate implementation.
    void NotifyAnimationStarted(double monotonic_time, int group) override {}
    void NotifyAnimationFinished(double monotonic_time, int group) override;
    void NotifyAnimationAborted(double monotonic_time, int group) override {}
  
    // CompositorAnimationClient implementation.
    CompositorAnimation* GetCompositorAnimation() const override;
  
    LayoutObject* GetLayoutObject() const {
      return node_ ? node_->GetLayoutObject() : nullptr;
    }
  
    CompositorElementId ElementIdForTesting() const { return element_id_; }
  
    const EffectPaintPropertyNode& Effect() const { return *effect_; }
  
    void UpdateBeforePrePaint();
    void UpdateAfterPrePaint();
    void Paint(GraphicsContext&);
  
    wtf_size_t FragmentCountForTesting() const { return fragments_.size(); }
    cc::PictureLayer* LayerForTesting(size_t index) const {
      return fragments_[index].Layer();
    }
  
   private:
    void ReleaseResources();
  
    void SetPaintArtifactCompositorNeedsUpdate();
    void UpdateOpacity(float opacity);
  
    class LinkHighlightFragment : private cc::ContentLayerClient {
     public:
      LinkHighlightFragment();
      ~LinkHighlightFragment() override;
  
      cc::PictureLayer* Layer() const { return layer_.get(); }
      const Path& GetPath() const { return path_; }
      void SetPath(const Path& path) { path_ = path; }
      void SetColor(const Color& color) { color_ = color; }
  
     private:
      // cc::ContentLayerClient implementation.
      gfx::Rect PaintableRegion() override;
      scoped_refptr<cc::DisplayItemList> PaintContentsToDisplayList(
          PaintingControlSetting painting_control) override;
      bool FillsBoundsCompletely() const override { return false; }
      size_t GetApproximateUnsharedMemoryUsage() const override { return 0; }
  
      scoped_refptr<cc::PictureLayer> layer_;
      Path path_;
      Color color_;
    };
    Vector<LinkHighlightFragment> fragments_;
  
    WeakPersistent<Node> node_;
    std::unique_ptr<CompositorAnimation> compositor_animation_;
    scoped_refptr<EffectPaintPropertyNode> effect_;
  
    bool is_animating_;
    base::TimeTicks start_time_;
    CompositorElementId element_id_;
  };
  
  }  // namespace blink
  
  #endif  // THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_LINK_HIGHLIGHT_IMPL_H_
  