| // 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_SCROLL_NODE_H_ |
| #define CC_TREES_SCROLL_NODE_H_ |
| |
| #include "cc/base/filter_operations.h" |
| #include "cc/base/region.h" |
| #include "cc/cc_export.h" |
| #include "ui/gfx/geometry/size.h" |
| |
| namespace base { |
| namespace trace_event { |
| class TracedValue; |
| } // namespace trace_event |
| } // namespace base |
| |
| namespace cc { |
| |
| struct CC_EXPORT ScrollNode { |
| ScrollNode(); |
| ScrollNode(const ScrollNode& other); |
| |
| // The node index of this node in the scroll tree node vector. |
| int id; |
| // The node index of the parent node in the scroll tree node vector. |
| int parent_id; |
| |
| // The layer id that corresponds to the layer contents that are scrolled. |
| // Unlike |id|, this id is stable across frames that don't change the |
| // composited layer list. |
| int owning_layer_id; |
| |
| // This is used for subtrees that should not be scrolled independently. For |
| // example, when there is a layer that is not scrollable itself but is inside |
| // a scrolling layer. |
| bool scrollable; |
| |
| uint32_t main_thread_scrolling_reasons; |
| |
| Region non_fast_scrollable_region; |
| |
| // Size of the clipped area, not including non-overlay scrollbars. Overlay |
| // scrollbars do not affect the clipped area. |
| gfx::Size scroll_clip_layer_bounds; |
| |
| // Bounds of the overflow scrolling area. |
| gfx::Size bounds; |
| |
| bool max_scroll_offset_affected_by_page_scale; |
| bool scrolls_inner_viewport; |
| bool scrolls_outer_viewport; |
| |
| // This offset is used when |scrollable| is false and there isn't a transform |
| // node already present that covers this offset. |
| gfx::Vector2dF offset_to_transform_parent; |
| |
| bool should_flatten; |
| bool user_scrollable_horizontal; |
| bool user_scrollable_vertical; |
| ElementId element_id; |
| int transform_id; |
| |
| bool operator==(const ScrollNode& other) const; |
| void AsValueInto(base::trace_event::TracedValue* value) const; |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_TREES_SCROLL_NODE_H_ |