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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "cc/blink/web_scrollbar_layer_impl.h"
      6 
      7 #include "cc/blink/scrollbar_impl.h"
      8 #include "cc/blink/web_layer_impl.h"
      9 #include "cc/layers/layer.h"
     10 #include "cc/layers/painted_scrollbar_layer.h"
     11 #include "cc/layers/scrollbar_layer_interface.h"
     12 #include "cc/layers/solid_color_scrollbar_layer.h"
     13 
     14 using cc::PaintedScrollbarLayer;
     15 using cc::SolidColorScrollbarLayer;
     16 
     17 namespace {
     18 
     19 cc::ScrollbarOrientation ConvertOrientation(
     20     blink::WebScrollbar::Orientation orientation) {
     21   return orientation == blink::WebScrollbar::Horizontal ? cc::HORIZONTAL
     22                                                         : cc::VERTICAL;
     23 }
     24 
     25 }  // namespace
     26 
     27 namespace cc_blink {
     28 
     29 WebScrollbarLayerImpl::WebScrollbarLayerImpl(
     30     blink::WebScrollbar* scrollbar,
     31     blink::WebScrollbarThemePainter painter,
     32     blink::WebScrollbarThemeGeometry* geometry)
     33     : layer_(new WebLayerImpl(PaintedScrollbarLayer::Create(
     34           scoped_ptr<cc::Scrollbar>(
     35               new ScrollbarImpl(make_scoped_ptr(scrollbar),
     36                                 painter,
     37                                 make_scoped_ptr(geometry))).Pass(),
     38           0))) {
     39 }
     40 
     41 WebScrollbarLayerImpl::WebScrollbarLayerImpl(
     42     blink::WebScrollbar::Orientation orientation,
     43     int thumb_thickness,
     44     int track_start,
     45     bool is_left_side_vertical_scrollbar)
     46     : layer_(new WebLayerImpl(
     47           SolidColorScrollbarLayer::Create(ConvertOrientation(orientation),
     48                                            thumb_thickness,
     49                                            track_start,
     50                                            is_left_side_vertical_scrollbar,
     51                                            0))) {
     52 }
     53 
     54 WebScrollbarLayerImpl::~WebScrollbarLayerImpl() {
     55 }
     56 
     57 blink::WebLayer* WebScrollbarLayerImpl::layer() {
     58   return layer_.get();
     59 }
     60 
     61 void WebScrollbarLayerImpl::setScrollLayer(blink::WebLayer* layer) {
     62   cc::Layer* scroll_layer =
     63       layer ? static_cast<WebLayerImpl*>(layer)->layer() : 0;
     64   layer_->layer()->ToScrollbarLayer()->SetScrollLayer(scroll_layer->id());
     65 }
     66 
     67 void WebScrollbarLayerImpl::setClipLayer(blink::WebLayer* layer) {
     68   cc::Layer* clip_layer =
     69       layer ? static_cast<WebLayerImpl*>(layer)->layer() : 0;
     70   layer_->layer()->ToScrollbarLayer()->SetClipLayer(clip_layer->id());
     71 }
     72 
     73 }  // namespace cc_blink
     74