// Copyright 2019 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/scrollbar_layer_base.h" #include "cc/layers/painted_overlay_scrollbar_layer.h" #include "cc/layers/painted_scrollbar_layer.h" #include "cc/layers/scrollbar_layer_impl_base.h" #include "cc/layers/solid_color_scrollbar_layer.h" namespace cc { ScrollbarLayerBase::ScrollbarLayerBase(ScrollbarOrientation orientation, bool is_left_side_vertical_scrollbar) : orientation_(orientation), is_left_side_vertical_scrollbar_(is_left_side_vertical_scrollbar) {} ScrollbarLayerBase::~ScrollbarLayerBase() = default; scoped_refptr ScrollbarLayerBase::CreateOrReuse( scoped_refptr scrollbar, ScrollbarLayerBase* existing_layer) { DCHECK(scrollbar); ScrollbarLayerType needed_type = kPainted; if (scrollbar->IsSolidColor()) { needed_type = kSolidColor; } else if (scrollbar->UsesNinePatchThumbResource()) { DCHECK(scrollbar->IsOverlay()); needed_type = kPaintedOverlay; } if (existing_layer && (existing_layer->GetScrollbarLayerType() != needed_type || // We don't support change of these fields in a layer. existing_layer->orientation() != scrollbar->Orientation() || existing_layer->is_left_side_vertical_scrollbar() != scrollbar->IsLeftSideVerticalScrollbar())) { existing_layer = nullptr; } switch (needed_type) { case kSolidColor: return SolidColorScrollbarLayer::CreateOrReuse( std::move(scrollbar), static_cast(existing_layer)); case kPainted: return PaintedScrollbarLayer::CreateOrReuse( std::move(scrollbar), static_cast(existing_layer)); case kPaintedOverlay: return PaintedOverlayScrollbarLayer::CreateOrReuse( std::move(scrollbar), static_cast(existing_layer)); } NOTREACHED(); return nullptr; } void ScrollbarLayerBase::SetScrollElementId(ElementId element_id) { if (element_id == scroll_element_id_) return; scroll_element_id_ = element_id; SetNeedsCommit(); } void ScrollbarLayerBase::PushPropertiesTo(LayerImpl* layer) { Layer::PushPropertiesTo(layer); auto* scrollbar_layer_impl = static_cast(layer); DCHECK_EQ(scrollbar_layer_impl->orientation(), orientation_); DCHECK_EQ(scrollbar_layer_impl->is_left_side_vertical_scrollbar(), is_left_side_vertical_scrollbar_); scrollbar_layer_impl->SetScrollElementId(scroll_element_id_); } bool ScrollbarLayerBase::IsScrollbarLayerForTesting() const { return true; } } // namespace cc