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* Copyright (C) 2008 Apple Inc. All Rights Reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "RenderScrollbarTheme.h"
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#include "RenderScrollbar.h"
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#include "ScrollbarThemeClient.h"
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#include <wtf/StdLibExtras.h>
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RenderScrollbarTheme* RenderScrollbarTheme::renderScrollbarTheme()
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DEFINE_STATIC_LOCAL(RenderScrollbarTheme, theme, ());
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void RenderScrollbarTheme::buttonSizesAlongTrackAxis(ScrollbarThemeClient* scrollbar, int& beforeSize, int& afterSize)
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IntRect firstButton = backButtonRect(scrollbar, BackButtonStartPart);
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IntRect secondButton = forwardButtonRect(scrollbar, ForwardButtonStartPart);
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IntRect thirdButton = backButtonRect(scrollbar, BackButtonEndPart);
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IntRect fourthButton = forwardButtonRect(scrollbar, ForwardButtonEndPart);
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if (scrollbar->orientation() == HorizontalScrollbar) {
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beforeSize = firstButton.width() + secondButton.width();
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afterSize = thirdButton.width() + fourthButton.width();
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beforeSize = firstButton.height() + secondButton.height();
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afterSize = thirdButton.height() + fourthButton.height();
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bool RenderScrollbarTheme::hasButtons(ScrollbarThemeClient* scrollbar)
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buttonSizesAlongTrackAxis(scrollbar, startSize, endSize);
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return (startSize + endSize) <= (scrollbar->orientation() == HorizontalScrollbar ? scrollbar->width() : scrollbar->height());
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bool RenderScrollbarTheme::hasThumb(ScrollbarThemeClient* scrollbar)
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return trackLength(scrollbar) - thumbLength(scrollbar) >= 0;
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int RenderScrollbarTheme::minimumThumbLength(ScrollbarThemeClient* scrollbar)
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return toRenderScrollbar(scrollbar)->minimumThumbLength();
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IntRect RenderScrollbarTheme::backButtonRect(ScrollbarThemeClient* scrollbar, ScrollbarPart partType, bool)
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return toRenderScrollbar(scrollbar)->buttonRect(partType);
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IntRect RenderScrollbarTheme::forwardButtonRect(ScrollbarThemeClient* scrollbar, ScrollbarPart partType, bool)
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return toRenderScrollbar(scrollbar)->buttonRect(partType);
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IntRect RenderScrollbarTheme::trackRect(ScrollbarThemeClient* scrollbar, bool)
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if (!hasButtons(scrollbar))
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return scrollbar->frameRect();
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buttonSizesAlongTrackAxis(scrollbar, startLength, endLength);
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return toRenderScrollbar(scrollbar)->trackRect(startLength, endLength);
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IntRect RenderScrollbarTheme::constrainTrackRectToTrackPieces(ScrollbarThemeClient* scrollbar, const IntRect& rect)
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IntRect backRect = toRenderScrollbar(scrollbar)->trackPieceRectWithMargins(BackTrackPart, rect);
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IntRect forwardRect = toRenderScrollbar(scrollbar)->trackPieceRectWithMargins(ForwardTrackPart, rect);
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IntRect result = rect;
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if (scrollbar->orientation() == HorizontalScrollbar) {
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result.setX(backRect.x());
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result.setWidth(forwardRect.maxX() - backRect.x());
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result.setY(backRect.y());
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result.setHeight(forwardRect.maxY() - backRect.y());
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void RenderScrollbarTheme::paintScrollCorner(ScrollView*, GraphicsContext* context, const IntRect& cornerRect)
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context->fillRect(cornerRect, Color::white, ColorSpaceDeviceRGB);
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void RenderScrollbarTheme::paintScrollbarBackground(GraphicsContext* context, ScrollbarThemeClient* scrollbar)
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toRenderScrollbar(scrollbar)->paintPart(context, ScrollbarBGPart, scrollbar->frameRect());
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void RenderScrollbarTheme::paintTrackBackground(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect)
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toRenderScrollbar(scrollbar)->paintPart(context, TrackBGPart, rect);
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void RenderScrollbarTheme::paintTrackPiece(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect, ScrollbarPart part)
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toRenderScrollbar(scrollbar)->paintPart(context, part, rect);
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void RenderScrollbarTheme::paintButton(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect, ScrollbarPart part)
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toRenderScrollbar(scrollbar)->paintPart(context, part, rect);
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void RenderScrollbarTheme::paintThumb(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect)
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toRenderScrollbar(scrollbar)->paintPart(context, ThumbPart, rect);
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void RenderScrollbarTheme::paintTickmarks(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect)
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ScrollbarTheme::theme()->paintTickmarks(context, scrollbar, rect);