cc: Reland Move data to LayerTree from LayerTreeHost.

cc/trees/layer_tree.h

 // Copyright 2016 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.
 
 #ifndef CC_TREES_LAYER_TREE_H_
 #define CC_TREES_LAYER_TREE_H_
 
+#include <memory>
+
 #include <unordered_map>
 #include <unordered_set>
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "cc/base/cc_export.h"
+#include "cc/input/event_listener_properties.h"
+#include "cc/input/layer_selection_bound.h"
+#include "cc/layers/layer_collections.h"
+#include "cc/trees/property_tree.h"
+#include "third_party/skia/include/core/SkColor.h"
+#include "ui/gfx/geometry/size.h"
 
-#include "base/macros.h"
-#include "cc/base/cc_export.h"
+namespace base {
+class TimeDelta;
+}  // namespace base
 
 namespace cc {
 
 namespace proto {
 class LayerTree;
 class LayerUpdate;
-}
+}  // namespace proto
 
 class AnimationHost;
+class HeadsUpDisplayLayer;
 class Layer;
+class LayerTreeHost;
+class LayerTreeImpl;
+struct PendingPageScaleAnimation;
 
 class CC_EXPORT LayerTree {
  public:
   using LayerSet = std::unordered_set<Layer*>;
   using LayerIdMap = std::unordered_map<int, Layer*>;
 
-  explicit LayerTree(std::unique_ptr<AnimationHost> animation_host);
-  ~LayerTree();
+  LayerTree(std::unique_ptr<AnimationHost> animation_host,
+            LayerTreeHost* layer_tree_host);
+  virtual ~LayerTree();
 
+  void SetRootLayer(scoped_refptr<Layer> root_layer);
+  Layer* root_layer() { return inputs_.root_layer.get(); }
+  const Layer* root_layer() const { return inputs_.root_layer.get(); }
+
+  void RegisterViewportLayers(scoped_refptr<Layer> overscroll_elasticity_layer,
+                              scoped_refptr<Layer> page_scale_layer,
+                              scoped_refptr<Layer> inner_viewport_scroll_layer,
+                              scoped_refptr<Layer> outer_viewport_scroll_layer);
+
+  Layer* overscroll_elasticity_layer() const {
+    return inputs_.overscroll_elasticity_layer.get();
+  }
+  Layer* page_scale_layer() const { return inputs_.page_scale_layer.get(); }
+  Layer* inner_viewport_scroll_layer() const {
+    return inputs_.inner_viewport_scroll_layer.get();
+  }
+  Layer* outer_viewport_scroll_layer() const {
+    return inputs_.outer_viewport_scroll_layer.get();
+  }
+
+  void RegisterSelection(const LayerSelection& selection);
+
+  void SetHaveScrollEventHandlers(bool have_event_handlers);
+  bool have_scroll_event_handlers() const {
+    return inputs_.have_scroll_event_handlers;
+  }
+
+  void SetEventListenerProperties(EventListenerClass event_class,
+                                  EventListenerProperties event_properties);
+  EventListenerProperties event_listener_properties(
+      EventListenerClass event_class) const {
+    return inputs_.event_listener_properties[static_cast<size_t>(event_class)];
+  }
+
+  void SetViewportSize(const gfx::Size& device_viewport_size);
+  gfx::Size device_viewport_size() const {
+    return inputs_.device_viewport_size;
+  }
+
+  void SetTopControlsHeight(float height, bool shrink);
+  void SetTopControlsShownRatio(float ratio);
+
+  void SetPageScaleFactorAndLimits(float page_scale_factor,
+                                   float min_page_scale_factor,
+                                   float max_page_scale_factor);
+  float page_scale_factor() const { return inputs_.page_scale_factor; }
+
+  void set_background_color(SkColor color) { inputs_.background_color = color; }
+  SkColor background_color() const { return inputs_.background_color; }
+
+  void set_has_transparent_background(bool transparent) {
+    inputs_.has_transparent_background = transparent;
+  }
+
+  void StartPageScaleAnimation(const gfx::Vector2d& target_offset,
+                               bool use_anchor,
+                               float scale,
+                               base::TimeDelta duration);
+  bool HasPendingPageScaleAnimation() const;
+
+  void SetDeviceScaleFactor(float device_scale_factor);
+  float device_scale_factor() const { return inputs_.device_scale_factor; }
+
+  void SetPaintedDeviceScaleFactor(float painted_device_scale_factor);
+
+  AnimationHost* animation_host() const { return animation_host_.get(); }
+
+  gfx::Vector2dF elastic_overscroll() const { return elastic_overscroll_; }
+
+  // Used externally by blink for setting the PropertyTrees when
+  // |settings_.use_layer_lists| is true. This is a SPV2 setting.
+  PropertyTrees* property_trees() { return &property_trees_; }
+
+  // Methods which should only be used internally in cc ------------------
   void RegisterLayer(Layer* layer);
   void UnregisterLayer(Layer* layer);
   Layer* LayerById(int id) const;
   bool UpdateLayers(const LayerList& update_layer_list,
                     bool* content_is_suitable_for_gpu);
 
   void AddLayerShouldPushProperties(Layer* layer);
   void RemoveLayerShouldPushProperties(Layer* layer);
   std::unordered_set<Layer*>& LayersThatShouldPushProperties();
   bool LayerNeedsPushPropertiesForTesting(Layer* layer) const;
 
+  virtual void SetNeedsMetaInfoRecomputation(
+      bool needs_meta_info_recomputation);
+  bool needs_meta_info_recomputation() const {
+    return needs_meta_info_recomputation_;
+  }
+
+  void SetPageScaleFromImplSide(float page_scale);
+  void SetElasticOverscrollFromImplSide(gfx::Vector2dF elastic_overscroll);
+
+  void UpdateHudLayer(bool show_hud_info);
+  HeadsUpDisplayLayer* hud_layer() const { return hud_layer_.get(); }
+
+  virtual void SetNeedsFullTreeSync();
+  bool needs_full_tree_sync() const { return needs_full_tree_sync_; }
+
+  void SetNeedsCommit();
+  void SetPropertyTreesNeedRebuild();
+
+  void PushPropertiesTo(LayerTreeImpl* tree_impl);
+
   void ToProtobuf(proto::LayerTree* proto);
   void FromProtobuf(const proto::LayerTree& proto);
 
-  AnimationHost* animation_host() const { return animation_host_.get(); }
-
   bool in_paint_layer_contents() const { return in_paint_layer_contents_; }
+  // ---------------------------------------------------------------------
 
  private:
   friend class LayerTreeHostSerializationTest;
 
+  // Encapsulates the data, callbacks, interfaces received from the embedder.
+  struct Inputs {
+    Inputs();
+    ~Inputs();
+
+    scoped_refptr<Layer> root_layer;
+
+    scoped_refptr<Layer> overscroll_elasticity_layer;
+    scoped_refptr<Layer> page_scale_layer;
+    scoped_refptr<Layer> inner_viewport_scroll_layer;
+    scoped_refptr<Layer> outer_viewport_scroll_layer;
+
+    float top_controls_height;
+    float top_controls_shown_ratio;
+    bool top_controls_shrink_blink_size;
+
+    float device_scale_factor;
+    float painted_device_scale_factor;
+    float page_scale_factor;
+    float min_page_scale_factor;
+    float max_page_scale_factor;
+
+    SkColor background_color;
+    bool has_transparent_background;
+
+    LayerSelection selection;
+
+    gfx::Size device_viewport_size;
+
+    bool have_scroll_event_handlers;
+    EventListenerProperties event_listener_properties[static_cast<size_t>(
+        EventListenerClass::kNumClasses)];
+
+    std::unique_ptr<PendingPageScaleAnimation> pending_page_scale_animation;
+  };
+
+  Inputs inputs_;
+
+  PropertyTrees property_trees_;
+
+  bool needs_full_tree_sync_;
+  bool needs_meta_info_recomputation_;
+
+  gfx::Vector2dF elastic_overscroll_;
+
+  scoped_refptr<HeadsUpDisplayLayer> hud_layer_;
+
   // Set of layers that need to push properties.
   LayerSet layers_that_should_push_properties_;
 
   // Layer id to Layer map.
   LayerIdMap layer_id_map_;
 
   bool in_paint_layer_contents_;
 
   std::unique_ptr<AnimationHost> animation_host_;
+  LayerTreeHost* layer_tree_host_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTree);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_H_