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/scrollbar_impl.h" 6 7 #include "base/logging.h" 8 #include "third_party/WebKit/public/platform/WebScrollbar.h" 9 #include "third_party/WebKit/public/platform/WebScrollbarThemeGeometry.h" 10 11 using blink::WebScrollbar; 12 13 namespace cc_blink { 14 15 ScrollbarImpl::ScrollbarImpl( 16 scoped_ptr<WebScrollbar> scrollbar, 17 blink::WebScrollbarThemePainter painter, 18 scoped_ptr<blink::WebScrollbarThemeGeometry> geometry) 19 : scrollbar_(scrollbar.Pass()), 20 painter_(painter), 21 geometry_(geometry.Pass()) { 22 } 23 24 ScrollbarImpl::~ScrollbarImpl() { 25 } 26 27 cc::ScrollbarOrientation ScrollbarImpl::Orientation() const { 28 if (scrollbar_->orientation() == WebScrollbar::Horizontal) 29 return cc::HORIZONTAL; 30 return cc::VERTICAL; 31 } 32 33 bool ScrollbarImpl::IsLeftSideVerticalScrollbar() const { 34 return scrollbar_->isLeftSideVerticalScrollbar(); 35 } 36 37 bool ScrollbarImpl::HasThumb() const { 38 return geometry_->hasThumb(scrollbar_.get()); 39 } 40 41 bool ScrollbarImpl::IsOverlay() const { 42 return scrollbar_->isOverlay(); 43 } 44 45 gfx::Point ScrollbarImpl::Location() const { 46 return scrollbar_->location(); 47 } 48 49 int ScrollbarImpl::ThumbThickness() const { 50 gfx::Rect thumb_rect = geometry_->thumbRect(scrollbar_.get()); 51 if (scrollbar_->orientation() == WebScrollbar::Horizontal) 52 return thumb_rect.height(); 53 return thumb_rect.width(); 54 } 55 56 int ScrollbarImpl::ThumbLength() const { 57 gfx::Rect thumb_rect = geometry_->thumbRect(scrollbar_.get()); 58 if (scrollbar_->orientation() == WebScrollbar::Horizontal) 59 return thumb_rect.width(); 60 return thumb_rect.height(); 61 } 62 63 gfx::Rect ScrollbarImpl::TrackRect() const { 64 return geometry_->trackRect(scrollbar_.get()); 65 } 66 67 void ScrollbarImpl::PaintPart(SkCanvas* canvas, 68 cc::ScrollbarPart part, 69 const gfx::Rect& content_rect) { 70 if (part == cc::THUMB) { 71 painter_.paintThumb(canvas, content_rect); 72 return; 73 } 74 75 // The following is a simplification of ScrollbarThemeComposite::paint. 76 painter_.paintScrollbarBackground(canvas, content_rect); 77 78 if (geometry_->hasButtons(scrollbar_.get())) { 79 gfx::Rect back_button_start_paint_rect = 80 geometry_->backButtonStartRect(scrollbar_.get()); 81 painter_.paintBackButtonStart(canvas, back_button_start_paint_rect); 82 83 gfx::Rect back_button_end_paint_rect = 84 geometry_->backButtonEndRect(scrollbar_.get()); 85 painter_.paintBackButtonEnd(canvas, back_button_end_paint_rect); 86 87 gfx::Rect forward_button_start_paint_rect = 88 geometry_->forwardButtonStartRect(scrollbar_.get()); 89 painter_.paintForwardButtonStart(canvas, forward_button_start_paint_rect); 90 91 gfx::Rect forward_button_end_paint_rect = 92 geometry_->forwardButtonEndRect(scrollbar_.get()); 93 painter_.paintForwardButtonEnd(canvas, forward_button_end_paint_rect); 94 } 95 96 gfx::Rect track_paint_rect = geometry_->trackRect(scrollbar_.get()); 97 painter_.paintTrackBackground(canvas, track_paint_rect); 98 99 bool thumb_present = geometry_->hasThumb(scrollbar_.get()); 100 if (thumb_present) { 101 painter_.paintForwardTrackPart(canvas, track_paint_rect); 102 painter_.paintBackTrackPart(canvas, track_paint_rect); 103 } 104 105 painter_.paintTickmarks(canvas, track_paint_rect); 106 } 107 108 } // namespace cc_blink 109
