First Implementation of Snapped Points

cc/layers/layer_impl.h

 // Copyright 2011 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_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 11 matching lines @@
 #include "cc/base/synced_property.h"
 #include "cc/cc_export.h"
 #include "cc/debug/layer_tree_debug_state.h"
 #include "cc/input/input_handler.h"
 #include "cc/layers/draw_properties.h"
 #include "cc/layers/layer_collections.h"
 #include "cc/layers/layer_impl_test_properties.h"
 #include "cc/layers/layer_position_constraint.h"
 #include "cc/layers/performance_properties.h"
 #include "cc/layers/render_surface_impl.h"
+#include "cc/layers/snap_point_list.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/tiles/tile_priority.h"
 #include "cc/trees/element_id.h"
 #include "cc/trees/mutator_host_client.h"
 #include "cc/trees/target_property.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/geometry/point3_f.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/rect_f.h"
@@ skipping 249 matching lines @@
     return viewport_layer_type() != NOT_VIEWPORT_LAYER;
   }
 
   void SetCurrentScrollOffset(const gfx::ScrollOffset& scroll_offset);
   gfx::ScrollOffset CurrentScrollOffset() const;
 
   gfx::ScrollOffset MaxScrollOffset() const;
   gfx::ScrollOffset ClampScrollOffsetToLimits(gfx::ScrollOffset offset) const;
   gfx::Vector2dF ClampScrollToMaxScrollOffset();
 
+  void SetScrollSnapOffsets(const SnapPointList& offsets);
+  std::vector<SnapPoint> snap_offsets_horizontal() {
+    return snap_offsets_.horizontal;
+  }
+  std::vector<SnapPoint> snap_offsets_vertical() {
+    return snap_offsets_.vertical;
+  }
+
   // Returns the delta of the scroll that was outside of the bounds of the
   // initial scroll
   gfx::Vector2dF ScrollBy(const gfx::Vector2dF& scroll);
 
   void SetScrollClipLayer(int scroll_clip_layer_id);
   int scroll_clip_layer_id() const { return scroll_clip_layer_id_; }
   LayerImpl* scroll_clip_layer() const;
   bool scrollable() const;
 
   void set_main_thread_scrolling_reasons(
@@ skipping 197 matching lines @@
   SkColor safe_opaque_background_color_;
 
   gfx::PointF position_;
 
   gfx::Rect clip_rect_in_target_space_;
   int transform_tree_index_;
   int effect_tree_index_;
   int clip_tree_index_;
   int scroll_tree_index_;
 
+  SnapPointList snap_offsets_;
+
  protected:
   friend class TreeSynchronizer;
 
   DrawMode current_draw_mode_;
 
  private:
   PropertyTrees* GetPropertyTrees() const;
   ClipTree& GetClipTree() const;
   EffectTree& GetEffectTree() const;
   ScrollTree& GetScrollTree() const;
@@ skipping 33 matching lines @@
   // is being animated). For this reason, while these layers are not drawn, they
   // are still rasterized.
   bool raster_even_if_not_drawn_ : 1;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_