| // 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. |
| |
| #ifndef CC_LAYERS_SCROLLBAR_LAYER_IMPL_BASE_H_ |
| #define CC_LAYERS_SCROLLBAR_LAYER_IMPL_BASE_H_ |
| |
| #include "base/containers/flat_set.h" |
| #include "base/macros.h" |
| #include "cc/cc_export.h" |
| #include "cc/input/scrollbar.h" |
| #include "cc/layers/layer.h" |
| #include "cc/layers/layer_impl.h" |
| #include "cc/trees/layer_tree_settings.h" |
| |
| namespace cc { |
| |
| class LayerTreeImpl; |
| |
| class CC_EXPORT ScrollbarLayerImplBase : public LayerImpl { |
| public: |
| ElementId scroll_element_id() const { return scroll_element_id_; } |
| void SetScrollElementId(ElementId scroll_element_id); |
| |
| // The following setters should be called when updating scrollbar geometries |
| // (see: LayerTreeImpl::UpdateScrollbarGeometries). |
| bool SetCurrentPos(float current_pos); |
| void SetClipLayerLength(float clip_layer_length); |
| void SetScrollLayerLength(float scroll_layer_length); |
| void SetVerticalAdjust(float vertical_adjust); |
| |
| float current_pos() const; |
| float clip_layer_length() const; |
| float scroll_layer_length() const; |
| float vertical_adjust() const; |
| |
| bool is_overlay_scrollbar() const { return is_overlay_scrollbar_; } |
| void set_is_overlay_scrollbar(bool is_overlay) { |
| is_overlay_scrollbar_ = is_overlay; |
| } |
| |
| ScrollbarOrientation orientation() const { return orientation_; } |
| bool is_left_side_vertical_scrollbar() { |
| return is_left_side_vertical_scrollbar_; |
| } |
| |
| bool CanScrollOrientation() const; |
| |
| void PushPropertiesTo(LayerImpl* layer) override; |
| ScrollbarLayerImplBase* ToScrollbarLayer() override; |
| |
| // Thumb quad rect in layer space. |
| gfx::Rect ComputeThumbQuadRect() const; |
| gfx::Rect ComputeExpandedThumbQuadRect() const; |
| |
| float thumb_thickness_scale_factor() { |
| return thumb_thickness_scale_factor_; |
| } |
| void SetThumbThicknessScaleFactor(float thumb_thickness_scale_factor); |
| |
| virtual int ThumbThickness() const = 0; |
| |
| void SetOverlayScrollbarLayerOpacityAnimated(float opacity); |
| |
| virtual LayerTreeSettings::ScrollbarAnimator GetScrollbarAnimator() const; |
| |
| protected: |
| ScrollbarLayerImplBase(LayerTreeImpl* tree_impl, |
| int id, |
| ScrollbarOrientation orientation, |
| bool is_left_side_vertical_scrollbar, |
| bool is_overlay); |
| ~ScrollbarLayerImplBase() override; |
| |
| virtual int ThumbLength() const = 0; |
| virtual float TrackLength() const = 0; |
| virtual int TrackStart() const = 0; |
| // Indicates whether the thumb length can be changed without going back to the |
| // main thread. |
| virtual bool IsThumbResizable() const = 0; |
| |
| private: |
| gfx::Rect ComputeThumbQuadRectWithThumbThicknessScale( |
| float thumb_thickness_scale_factor) const; |
| |
| ElementId scroll_element_id_; |
| bool is_overlay_scrollbar_; |
| |
| float thumb_thickness_scale_factor_; |
| float current_pos_; |
| float clip_layer_length_; |
| float scroll_layer_length_; |
| ScrollbarOrientation orientation_; |
| bool is_left_side_vertical_scrollbar_; |
| |
| // Difference between the clip layer's height and the visible viewport |
| // height (which may differ in the presence of top-controls hiding). |
| float vertical_adjust_; |
| |
| FRIEND_TEST_ALL_PREFIXES(ScrollbarLayerTest, |
| ScrollElementIdPushedAcrossCommit); |
| |
| DISALLOW_COPY_AND_ASSIGN(ScrollbarLayerImplBase); |
| }; |
| |
| using ScrollbarSet = base::flat_set<ScrollbarLayerImplBase*>; |
| |
| } // namespace cc |
| |
| #endif // CC_LAYERS_SCROLLBAR_LAYER_IMPL_BASE_H_ |