165 lines
6.1 KiB
C++
165 lines
6.1 KiB
C++
/*
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* Copyright (C) 2008 Apple Inc. All Rights Reserved.
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*
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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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* are met:
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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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*
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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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*/
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#include "config.h"
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#include "RenderScrollbarTheme.h"
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#include "RenderScrollbar.h"
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#include <wtf/NeverDestroyed.h>
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#include <wtf/StdLibExtras.h>
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namespace WebCore {
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RenderScrollbarTheme* RenderScrollbarTheme::renderScrollbarTheme()
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{
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static NeverDestroyed<RenderScrollbarTheme> theme;
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return &theme.get();
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}
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void RenderScrollbarTheme::buttonSizesAlongTrackAxis(Scrollbar& scrollbar, int& beforeSize, int& afterSize)
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{
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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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} else {
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beforeSize = firstButton.height() + secondButton.height();
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afterSize = thirdButton.height() + fourthButton.height();
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}
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}
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bool RenderScrollbarTheme::hasButtons(Scrollbar& scrollbar)
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{
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int startSize;
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int endSize;
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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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}
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bool RenderScrollbarTheme::hasThumb(Scrollbar& scrollbar)
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{
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return trackLength(scrollbar) - thumbLength(scrollbar) >= 0;
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}
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int RenderScrollbarTheme::minimumThumbLength(Scrollbar& scrollbar)
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{
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return downcast<RenderScrollbar>(scrollbar).minimumThumbLength();
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}
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IntRect RenderScrollbarTheme::backButtonRect(Scrollbar& scrollbar, ScrollbarPart partType, bool)
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{
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return downcast<RenderScrollbar>(scrollbar).buttonRect(partType);
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}
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IntRect RenderScrollbarTheme::forwardButtonRect(Scrollbar& scrollbar, ScrollbarPart partType, bool)
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{
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return downcast<RenderScrollbar>(scrollbar).buttonRect(partType);
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}
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IntRect RenderScrollbarTheme::trackRect(Scrollbar& scrollbar, bool)
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{
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if (!hasButtons(scrollbar))
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return scrollbar.frameRect();
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int startLength;
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int endLength;
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buttonSizesAlongTrackAxis(scrollbar, startLength, endLength);
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return downcast<RenderScrollbar>(scrollbar).trackRect(startLength, endLength);
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}
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IntRect RenderScrollbarTheme::constrainTrackRectToTrackPieces(Scrollbar& scrollbar, const IntRect& rect)
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{
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IntRect backRect = downcast<RenderScrollbar>(scrollbar).trackPieceRectWithMargins(BackTrackPart, rect);
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IntRect forwardRect = downcast<RenderScrollbar>(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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} else {
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result.setY(backRect.y());
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result.setHeight(forwardRect.maxY() - backRect.y());
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}
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return result;
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}
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void RenderScrollbarTheme::willPaintScrollbar(GraphicsContext& context, Scrollbar& scrollbar)
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{
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float opacity = downcast<RenderScrollbar>(scrollbar).opacity();
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if (opacity != 1) {
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context.save();
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context.clip(scrollbar.frameRect());
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context.beginTransparencyLayer(opacity);
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}
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}
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void RenderScrollbarTheme::didPaintScrollbar(GraphicsContext& context, Scrollbar& scrollbar)
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{
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float opacity = downcast<RenderScrollbar>(scrollbar).opacity();
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if (opacity != 1) {
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context.endTransparencyLayer();
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context.restore();
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}
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}
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void RenderScrollbarTheme::paintScrollCorner(ScrollableArea& area, GraphicsContext& context, const IntRect& cornerRect)
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{
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ScrollbarTheme::theme().paintScrollCorner(area, context, cornerRect);
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}
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void RenderScrollbarTheme::paintScrollbarBackground(GraphicsContext& context, Scrollbar& scrollbar)
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{
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downcast<RenderScrollbar>(scrollbar).paintPart(context, ScrollbarBGPart, scrollbar.frameRect());
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}
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void RenderScrollbarTheme::paintTrackBackground(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect)
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{
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downcast<RenderScrollbar>(scrollbar).paintPart(context, TrackBGPart, rect);
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}
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void RenderScrollbarTheme::paintTrackPiece(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect, ScrollbarPart part)
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{
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downcast<RenderScrollbar>(scrollbar).paintPart(context, part, rect);
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}
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void RenderScrollbarTheme::paintButton(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect, ScrollbarPart part)
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{
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downcast<RenderScrollbar>(scrollbar).paintPart(context, part, rect);
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}
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void RenderScrollbarTheme::paintThumb(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect)
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{
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downcast<RenderScrollbar>(scrollbar).paintPart(context, ThumbPart, rect);
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}
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void RenderScrollbarTheme::paintTickmarks(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect)
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{
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ScrollbarTheme::theme().paintTickmarks(context, scrollbar, rect);
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}
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}
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