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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+PointerEvents.h"
#include "CSSParserTokenRange.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertyParserConsumer+Ident.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
namespace WebCore {
namespace CSSPropertyParserHelpers {
RefPtr<CSSValue> consumeTouchAction(CSSParserTokenRange& range, const CSSParserContext&)
{
// <'touch-action'> = auto | none | [ [ pan-x | pan-left | pan-right ] || [ pan-y | pan-up | pan-down ] ] | manipulation
// https://w3c.github.io/pointerevents/#the-touch-action-css-property
if (auto ident = consumeIdent<CSSValueNone, CSSValueAuto, CSSValueManipulation>(range))
return ident;
bool hasPanX = false;
bool hasPanY = false;
bool hasPinchZoom = false;
while (true) {
auto ident = consumeIdentRaw<CSSValuePanX, CSSValuePanY, CSSValuePinchZoom>(range);
if (!ident)
break;
switch (*ident) {
case CSSValuePanX:
if (hasPanX)
return nullptr;
hasPanX = true;
break;
case CSSValuePanY:
if (hasPanY)
return nullptr;
hasPanY = true;
break;
case CSSValuePinchZoom:
if (hasPinchZoom)
return nullptr;
hasPinchZoom = true;
break;
default:
return nullptr;
}
}
if (!hasPanX && !hasPanY && !hasPinchZoom)
return nullptr;
CSSValueListBuilder builder;
if (hasPanX)
builder.append(CSSPrimitiveValue::create(CSSValuePanX));
if (hasPanY)
builder.append(CSSPrimitiveValue::create(CSSValuePanY));
if (hasPinchZoom)
builder.append(CSSPrimitiveValue::create(CSSValuePinchZoom));
return CSSValueList::createSpaceSeparated(WTFMove(builder));
}
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
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