blob: 21b893e3b1c2af959b4b2828db2aad6cfa1129c4 [file] [log] [blame]
/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "RenderScrollbarTheme.h"
#include "RenderScrollbar.h"
#include <wtf/NeverDestroyed.h>
#include <wtf/StdLibExtras.h>
namespace WebCore {
RenderScrollbarTheme* RenderScrollbarTheme::renderScrollbarTheme()
{
static NeverDestroyed<RenderScrollbarTheme> theme;
return &theme.get();
}
void RenderScrollbarTheme::buttonSizesAlongTrackAxis(Scrollbar& scrollbar, int& beforeSize, int& afterSize)
{
IntRect firstButton = backButtonRect(scrollbar, BackButtonStartPart);
IntRect secondButton = forwardButtonRect(scrollbar, ForwardButtonStartPart);
IntRect thirdButton = backButtonRect(scrollbar, BackButtonEndPart);
IntRect fourthButton = forwardButtonRect(scrollbar, ForwardButtonEndPart);
if (scrollbar.orientation() == ScrollbarOrientation::Horizontal) {
beforeSize = firstButton.width() + secondButton.width();
afterSize = thirdButton.width() + fourthButton.width();
} else {
beforeSize = firstButton.height() + secondButton.height();
afterSize = thirdButton.height() + fourthButton.height();
}
}
bool RenderScrollbarTheme::hasButtons(Scrollbar& scrollbar)
{
int startSize;
int endSize;
buttonSizesAlongTrackAxis(scrollbar, startSize, endSize);
return (startSize + endSize) <= (scrollbar.orientation() == ScrollbarOrientation::Horizontal ? scrollbar.width() : scrollbar.height());
}
bool RenderScrollbarTheme::hasThumb(Scrollbar& scrollbar)
{
return trackLength(scrollbar) - thumbLength(scrollbar) >= 0;
}
int RenderScrollbarTheme::minimumThumbLength(Scrollbar& scrollbar)
{
return downcast<RenderScrollbar>(scrollbar).minimumThumbLength();
}
IntRect RenderScrollbarTheme::backButtonRect(Scrollbar& scrollbar, ScrollbarPart partType, bool)
{
return downcast<RenderScrollbar>(scrollbar).buttonRect(partType);
}
IntRect RenderScrollbarTheme::forwardButtonRect(Scrollbar& scrollbar, ScrollbarPart partType, bool)
{
return downcast<RenderScrollbar>(scrollbar).buttonRect(partType);
}
IntRect RenderScrollbarTheme::trackRect(Scrollbar& scrollbar, bool)
{
if (!hasButtons(scrollbar))
return scrollbar.frameRect();
int startLength;
int endLength;
buttonSizesAlongTrackAxis(scrollbar, startLength, endLength);
return downcast<RenderScrollbar>(scrollbar).trackRect(startLength, endLength);
}
IntRect RenderScrollbarTheme::constrainTrackRectToTrackPieces(Scrollbar& scrollbar, const IntRect& rect)
{
IntRect backRect = downcast<RenderScrollbar>(scrollbar).trackPieceRectWithMargins(BackTrackPart, rect);
IntRect forwardRect = downcast<RenderScrollbar>(scrollbar).trackPieceRectWithMargins(ForwardTrackPart, rect);
IntRect result = rect;
if (scrollbar.orientation() == ScrollbarOrientation::Horizontal) {
result.setX(backRect.x());
result.setWidth(forwardRect.maxX() - backRect.x());
} else {
result.setY(backRect.y());
result.setHeight(forwardRect.maxY() - backRect.y());
}
return result;
}
void RenderScrollbarTheme::willPaintScrollbar(GraphicsContext& context, Scrollbar& scrollbar)
{
float opacity = downcast<RenderScrollbar>(scrollbar).opacity();
if (opacity != 1) {
context.save();
context.clip(scrollbar.frameRect());
context.beginTransparencyLayer(opacity);
}
}
void RenderScrollbarTheme::didPaintScrollbar(GraphicsContext& context, Scrollbar& scrollbar)
{
float opacity = downcast<RenderScrollbar>(scrollbar).opacity();
if (opacity != 1) {
context.endTransparencyLayer();
context.restore();
}
}
void RenderScrollbarTheme::paintScrollCorner(ScrollableArea& area, GraphicsContext& context, const IntRect& cornerRect)
{
ScrollbarTheme::theme().paintScrollCorner(area, context, cornerRect);
}
void RenderScrollbarTheme::paintScrollbarBackground(GraphicsContext& context, Scrollbar& scrollbar)
{
downcast<RenderScrollbar>(scrollbar).paintPart(context, ScrollbarBGPart, scrollbar.frameRect());
}
void RenderScrollbarTheme::paintTrackBackground(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect)
{
downcast<RenderScrollbar>(scrollbar).paintPart(context, TrackBGPart, rect);
}
void RenderScrollbarTheme::paintTrackPiece(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect, ScrollbarPart part)
{
downcast<RenderScrollbar>(scrollbar).paintPart(context, part, rect);
}
void RenderScrollbarTheme::paintButton(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect, ScrollbarPart part)
{
downcast<RenderScrollbar>(scrollbar).paintPart(context, part, rect);
}
void RenderScrollbarTheme::paintThumb(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect)
{
downcast<RenderScrollbar>(scrollbar).paintPart(context, ThumbPart, rect);
}
void RenderScrollbarTheme::paintTickmarks(GraphicsContext& context, Scrollbar& scrollbar, const IntRect& rect)
{
ScrollbarTheme::theme().paintTickmarks(context, scrollbar, rect);
}
}