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- // 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.
- #include "cc/layers/solid_color_scrollbar_layer_impl.h"
- #include <algorithm>
- #include <memory>
- #include "base/memory/ptr_util.h"
- #include "cc/trees/layer_tree_impl.h"
- #include "cc/trees/layer_tree_settings.h"
- #include "cc/trees/occlusion.h"
- #include "components/viz/common/quads/solid_color_draw_quad.h"
- namespace cc {
- std::unique_ptr<SolidColorScrollbarLayerImpl>
- SolidColorScrollbarLayerImpl::Create(LayerTreeImpl* tree_impl,
- int id,
- ScrollbarOrientation orientation,
- int thumb_thickness,
- int track_start,
- bool is_left_side_vertical_scrollbar) {
- return base::WrapUnique(new SolidColorScrollbarLayerImpl(
- tree_impl, id, orientation, thumb_thickness, track_start,
- is_left_side_vertical_scrollbar));
- }
- SolidColorScrollbarLayerImpl::~SolidColorScrollbarLayerImpl() = default;
- std::unique_ptr<LayerImpl> SolidColorScrollbarLayerImpl::CreateLayerImpl(
- LayerTreeImpl* tree_impl) const {
- return SolidColorScrollbarLayerImpl::Create(
- tree_impl, id(), orientation(), thumb_thickness_, track_start_,
- is_left_side_vertical_scrollbar());
- }
- SolidColorScrollbarLayerImpl::SolidColorScrollbarLayerImpl(
- LayerTreeImpl* tree_impl,
- int id,
- ScrollbarOrientation orientation,
- int thumb_thickness,
- int track_start,
- bool is_left_side_vertical_scrollbar)
- : ScrollbarLayerImplBase(tree_impl,
- id,
- orientation,
- is_left_side_vertical_scrollbar,
- /*is_overlay*/ true),
- thumb_thickness_(thumb_thickness),
- track_start_(track_start),
- color_(tree_impl->settings().solid_color_scrollbar_color) {}
- void SolidColorScrollbarLayerImpl::PushPropertiesTo(LayerImpl* layer) {
- ScrollbarLayerImplBase::PushPropertiesTo(layer);
- DCHECK(!layer->HitTestable());
- }
- int SolidColorScrollbarLayerImpl::ThumbThickness() const {
- if (thumb_thickness_ != -1)
- return thumb_thickness_;
- if (orientation() == ScrollbarOrientation::HORIZONTAL)
- return bounds().height();
- else
- return bounds().width();
- }
- int SolidColorScrollbarLayerImpl::ThumbLength() const {
- float thumb_length = TrackLength();
- if (scroll_layer_length())
- thumb_length *= clip_layer_length() / scroll_layer_length();
- return std::max(static_cast<int>(thumb_length), ThumbThickness());
- }
- float SolidColorScrollbarLayerImpl::TrackLength() const {
- if (orientation() == ScrollbarOrientation::HORIZONTAL)
- return bounds().width() - TrackStart() * 2;
- else
- return bounds().height() + vertical_adjust() - TrackStart() * 2;
- }
- int SolidColorScrollbarLayerImpl::TrackStart() const { return track_start_; }
- bool SolidColorScrollbarLayerImpl::IsThumbResizable() const {
- return true;
- }
- void SolidColorScrollbarLayerImpl::AppendQuads(
- viz::CompositorRenderPass* render_pass,
- AppendQuadsData* append_quads_data) {
- viz::SharedQuadState* shared_quad_state =
- render_pass->CreateAndAppendSharedQuadState();
- PopulateSharedQuadState(shared_quad_state, contents_opaque());
- AppendDebugBorderQuad(render_pass, gfx::Rect(bounds()), shared_quad_state,
- append_quads_data);
- gfx::Rect thumb_quad_rect(ComputeThumbQuadRect());
- gfx::Rect visible_quad_rect =
- draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
- thumb_quad_rect);
- if (visible_quad_rect.IsEmpty())
- return;
- auto* quad = render_pass->CreateAndAppendDrawQuad<viz::SolidColorDrawQuad>();
- quad->SetNew(shared_quad_state, thumb_quad_rect, visible_quad_rect, color_,
- false);
- }
- const char* SolidColorScrollbarLayerImpl::LayerTypeAsString() const {
- return "cc::SolidColorScrollbarLayerImpl";
- }
- } // namespace cc
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