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/*
* Copyright (C) 2014 Yoav Weiss <yoav@yoav.ws>
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "SourceSizeList.h"
#include "CSSParser.h"
#include "CSSToLengthConversionData.h"
#include "MediaList.h"
#include "MediaQuery.h"
#include "MediaQueryEvaluator.h"
#include "MediaQueryExp.h"
#include "RenderStyle.h"
#include "RenderView.h"
namespace WebCore {
static bool match(std::unique_ptr<MediaQueryExp>&& expression, RenderStyle& style, Frame* frame)
{
if (expression->mediaFeature().isEmpty())
return true;
auto expList = std::make_unique<Vector<std::unique_ptr<MediaQueryExp>>>();
expList->append(WTFMove(expression));
RefPtr<MediaQuerySet> mediaQuerySet = MediaQuerySet::create();
mediaQuerySet->addMediaQuery(std::make_unique<MediaQuery>(MediaQuery::None, "all", WTFMove(expList)));
MediaQueryEvaluator mediaQueryEvaluator("screen", frame, &style);
return mediaQueryEvaluator.eval(mediaQuerySet.get());
}
static float defaultLength(RenderStyle& style, RenderView* view)
{
return clampTo<float>(CSSPrimitiveValue::computeNonCalcLengthDouble(CSSToLengthConversionData(&style, &style, view), CSSPrimitiveValue::CSS_VW, 100.0));
}
static float computeLength(CSSValue* value, RenderStyle& style, RenderView* view)
{
CSSToLengthConversionData conversionData(&style, &style, view);
if (is<CSSPrimitiveValue>(value)) {
CSSPrimitiveValue& primitiveValue = downcast<CSSPrimitiveValue>(*value);
if (!primitiveValue.isLength())
return defaultLength(style, view);
return primitiveValue.computeLength<float>(conversionData);
}
if (is<CSSCalcValue>(value))
return downcast<CSSCalcValue>(*value).computeLengthPx(conversionData);
return defaultLength(style, view);
}
float parseSizesAttribute(StringView sizesAttribute, RenderView* view, Frame* frame)
{
if (!view)
return 0;
RenderStyle& style = view->style();
for (auto& sourceSize : CSSParser(CSSStrictMode).parseSizesAttribute(sizesAttribute)) {
if (match(WTFMove(sourceSize.expression), style, frame))
return computeLength(sourceSize.length.get(), style, view);
}
return defaultLength(style, view);
}
} // namespace WebCore
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