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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 "content/renderer/compositor_bindings/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 content { | |
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 content | |
109 | |
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