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// Copyright 2014 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/blink/scrollbar_impl.h"
#include "base/logging.h"
#include "third_party/WebKit/public/platform/WebScrollbar.h"
#include "third_party/WebKit/public/platform/WebScrollbarThemeGeometry.h"
using blink::WebScrollbar;
namespace cc_blink {
ScrollbarImpl::ScrollbarImpl(
scoped_ptr<WebScrollbar> scrollbar,
blink::WebScrollbarThemePainter painter,
scoped_ptr<blink::WebScrollbarThemeGeometry> geometry)
: scrollbar_(scrollbar.Pass()),
painter_(painter),
geometry_(geometry.Pass()) {
}
ScrollbarImpl::~ScrollbarImpl() {
}
cc::ScrollbarOrientation ScrollbarImpl::Orientation() const {
if (scrollbar_->orientation() == WebScrollbar::Horizontal)
return cc::HORIZONTAL;
return cc::VERTICAL;
}
bool ScrollbarImpl::IsLeftSideVerticalScrollbar() const {
return scrollbar_->isLeftSideVerticalScrollbar();
}
bool ScrollbarImpl::HasThumb() const {
return geometry_->hasThumb(scrollbar_.get());
}
bool ScrollbarImpl::IsOverlay() const {
return scrollbar_->isOverlay();
}
gfx::Point ScrollbarImpl::Location() const {
return scrollbar_->location();
}
int ScrollbarImpl::ThumbThickness() const {
gfx::Rect thumb_rect = geometry_->thumbRect(scrollbar_.get());
if (scrollbar_->orientation() == WebScrollbar::Horizontal)
return thumb_rect.height();
return thumb_rect.width();
}
int ScrollbarImpl::ThumbLength() const {
gfx::Rect thumb_rect = geometry_->thumbRect(scrollbar_.get());
if (scrollbar_->orientation() == WebScrollbar::Horizontal)
return thumb_rect.width();
return thumb_rect.height();
}
gfx::Rect ScrollbarImpl::TrackRect() const {
return geometry_->trackRect(scrollbar_.get());
}
void ScrollbarImpl::PaintPart(SkCanvas* canvas,
cc::ScrollbarPart part,
const gfx::Rect& content_rect) {
if (part == cc::THUMB) {
painter_.paintThumb(canvas, content_rect);
return;
}
// The following is a simplification of ScrollbarThemeComposite::paint.
painter_.paintScrollbarBackground(canvas, content_rect);
if (geometry_->hasButtons(scrollbar_.get())) {
gfx::Rect back_button_start_paint_rect =
geometry_->backButtonStartRect(scrollbar_.get());
painter_.paintBackButtonStart(canvas, back_button_start_paint_rect);
gfx::Rect back_button_end_paint_rect =
geometry_->backButtonEndRect(scrollbar_.get());
painter_.paintBackButtonEnd(canvas, back_button_end_paint_rect);
gfx::Rect forward_button_start_paint_rect =
geometry_->forwardButtonStartRect(scrollbar_.get());
painter_.paintForwardButtonStart(canvas, forward_button_start_paint_rect);
gfx::Rect forward_button_end_paint_rect =
geometry_->forwardButtonEndRect(scrollbar_.get());
painter_.paintForwardButtonEnd(canvas, forward_button_end_paint_rect);
}
gfx::Rect track_paint_rect = geometry_->trackRect(scrollbar_.get());
painter_.paintTrackBackground(canvas, track_paint_rect);
bool thumb_present = geometry_->hasThumb(scrollbar_.get());
if (thumb_present) {
painter_.paintForwardTrackPart(canvas, track_paint_rect);
painter_.paintBackTrackPart(canvas, track_paint_rect);
}
painter_.paintTickmarks(canvas, track_paint_rect);
}
} // namespace cc_blink
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