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/*
* Copyright (C) 2016-2023 Apple Inc. All rights reserved.
* Copyright (C) 2024 Samuel Weinig <sam@webkit.org>
*
* 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,
* 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 "CSSPropertyParserConsumer+Masking.h"
#include "CSSParserTokenRange.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertyParserConsumer+Ident.h"
#include "CSSPropertyParserConsumer+Length.h"
#include "CSSPropertyParserConsumer+Primitives.h"
#include "CSSPropertyParserConsumer+Shapes.h"
#include "CSSPropertyParserConsumer+URL.h"
#include "CSSPropertyParsing.h"
#include "CSSRectValue.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
namespace WebCore {
namespace CSSPropertyParserHelpers {
static RefPtr<CSSValue> consumeClipRectFunction(CSSParserTokenRange& range, const CSSParserContext& context)
{
// rect() = rect( <top>, <right>, <bottom>, <left> )
// "<top>, <right>, <bottom>, and <left> may either have a <length> value or auto."
// https://drafts.fxtf.org/css-masking/#funcdef-clip-rect
if (range.peek().functionId() != CSSValueRect)
return nullptr;
CSSParserTokenRange args = consumeFunction(range);
auto consumeClipComponent = [&] -> RefPtr<CSSPrimitiveValue> {
if (args.peek().id() == CSSValueAuto)
return consumeIdent(args);
return consumeLength(args, context, ValueRange::All, UnitlessQuirk::Allow);
};
// Support both rect(t, r, b, l) and rect(t r b l).
//
// "User agents must support separation with commas, but may also support
// separation without commas (but not a combination), because a previous
// revision of this specification was ambiguous in this respect"
auto top = consumeClipComponent();
if (!top)
return nullptr;
bool needsComma = consumeCommaIncludingWhitespace(args);
auto right = consumeClipComponent();
if (!right || (needsComma && !consumeCommaIncludingWhitespace(args)))
return nullptr;
auto bottom = consumeClipComponent();
if (!bottom || (needsComma && !consumeCommaIncludingWhitespace(args)))
return nullptr;
auto left = consumeClipComponent();
if (!left || !args.atEnd())
return nullptr;
return CSSRectValue::create(
Rect {
top.releaseNonNull(),
right.releaseNonNull(),
bottom.releaseNonNull(),
left.releaseNonNull()
}
);
}
RefPtr<CSSValue> consumeClip(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <'clip'> = <rect()> | auto
// https://drafts.fxtf.org/css-masking/#propdef-clip
if (range.peek().id() == CSSValueAuto)
return consumeIdent(range);
return consumeClipRectFunction(range, context);
}
RefPtr<CSSValue> consumeClipPath(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <'clip-path'> = none | <clip-source> | [ <basic-shape> || <geometry-box> ]
// <clip-source> = <url>
// https://drafts.fxtf.org/css-masking/#propdef-clip-path
if (range.peek().id() == CSSValueNone)
return consumeIdent(range);
if (auto url = consumeURL(range))
return url;
RefPtr<CSSValue> shape;
RefPtr<CSSValue> box;
auto consumeShape = [&]() -> bool {
if (shape)
return false;
shape = consumeBasicShape(range, context, { });
return !!shape;
};
auto consumeBox = [&]() -> bool {
if (box)
return false;
box = CSSPropertyParsing::consumeGeometryBox(range);
return !!box;
};
while (!range.atEnd()) {
if (consumeShape() || consumeBox())
continue;
break;
}
bool hasShape = !!shape;
CSSValueListBuilder list;
if (shape)
list.append(shape.releaseNonNull());
// Default value is border-box.
if (box && (box->valueID() != CSSValueBorderBox || !hasShape))
list.append(box.releaseNonNull());
if (list.isEmpty())
return nullptr;
return CSSValueList::createSpaceSeparated(WTFMove(list));
}
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
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