cc/layers/solid_color_scrollbar_layer.cc

// 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.h"

#include "base/memory/scoped_ptr.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/solid_color_scrollbar_layer_impl.h"

namespace cc {

scoped_ptr<LayerImpl> SolidColorScrollbarLayer::CreateLayerImpl(
    LayerTreeImpl* tree_impl) {
  const bool kIsOverlayScrollbar = true;
  return SolidColorScrollbarLayerImpl::Create(tree_impl,
                                              id(),
                                              orientation(),
                                              thumb_thickness_,
                                              track_start_,
                                              is_left_side_vertical_scrollbar_,
                                              kIsOverlayScrollbar);
}

scoped_refptr<SolidColorScrollbarLayer> SolidColorScrollbarLayer::Create(
    const LayerSettings& settings,
    ScrollbarOrientation orientation,
    int thumb_thickness,
    int track_start,
    bool is_left_side_vertical_scrollbar,
    int scroll_layer_id) {
  return make_scoped_refptr(new SolidColorScrollbarLayer(
      settings, orientation, thumb_thickness, track_start,
      is_left_side_vertical_scrollbar, scroll_layer_id));
}

SolidColorScrollbarLayer::SolidColorScrollbarLayer(
    const LayerSettings& settings,
    ScrollbarOrientation orientation,
    int thumb_thickness,
    int track_start,
    bool is_left_side_vertical_scrollbar,
    int scroll_layer_id)
    : Layer(settings),
      scroll_layer_id_(Layer::INVALID_ID),
      clip_layer_id_(scroll_layer_id),
      orientation_(orientation),
      thumb_thickness_(thumb_thickness),
      track_start_(track_start),
      is_left_side_vertical_scrollbar_(is_left_side_vertical_scrollbar) {
}

SolidColorScrollbarLayer::~SolidColorScrollbarLayer() {}

ScrollbarLayerInterface* SolidColorScrollbarLayer::ToScrollbarLayer() {
  return this;
}

void SolidColorScrollbarLayer::PushPropertiesTo(LayerImpl* layer) {
  Layer::PushPropertiesTo(layer);
  PushScrollClipPropertiesTo(layer);
}

void SolidColorScrollbarLayer::PushScrollClipPropertiesTo(LayerImpl* layer) {
  SolidColorScrollbarLayerImpl* scrollbar_layer =
      static_cast<SolidColorScrollbarLayerImpl*>(layer);

  scrollbar_layer->SetScrollLayerAndClipLayerByIds(scroll_layer_id_,
                                                   clip_layer_id_);
}

void SolidColorScrollbarLayer::SetNeedsDisplayRect(const gfx::Rect& rect) {
  // Never needs repaint.
}

bool SolidColorScrollbarLayer::OpacityCanAnimateOnImplThread() const {
  return true;
}

int SolidColorScrollbarLayer::ScrollLayerId() const {
  return scroll_layer_id_;
}

void SolidColorScrollbarLayer::SetScrollLayer(int layer_id) {
  if (layer_id == scroll_layer_id_)
    return;

  scroll_layer_id_ = layer_id;
  SetNeedsFullTreeSync();
}

void SolidColorScrollbarLayer::SetClipLayer(int layer_id) {
  if (layer_id == clip_layer_id_)
    return;

  clip_layer_id_ = layer_id;
  SetNeedsFullTreeSync();
}

ScrollbarOrientation SolidColorScrollbarLayer::orientation() const {
  return orientation_;
}

}  // namespace cc