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/*
* Copyright (C) 2024 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+Timeline.h"
#include "CSSParserContext.h"
#include "CSSParserTokenRange.h"
#include "CSSPropertyParserConsumer+Ident.h"
#include "CSSPropertyParserConsumer+LengthPercentage.h"
#include "CSSPropertyParserConsumer+List.h"
#include "CSSPropertyParsing.h"
#include "CSSScrollValue.h"
#include "CSSValuePair.h"
#include "CSSViewValue.h"
#include "TimelineRange.h"
namespace WebCore {
namespace CSSPropertyParserHelpers {
static RefPtr<CSSValue> consumeAnimationTimelineScroll(CSSParserTokenRange& range, const CSSParserContext&)
{
// <scroll()> = scroll( [ <scroller> || <axis> ]? )
// <scroller> = root | nearest | self
// <axis> = block | inline | x | y
// https://drafts.csswg.org/scroll-animations-1/#scroll-notation
if (range.peek().type() != FunctionToken || range.peek().functionId() != CSSValueScroll)
return nullptr;
auto args = consumeFunction(range);
if (!args.size())
return CSSScrollValue::create(nullptr, nullptr);
auto scroller = CSSPropertyParsing::consumeScroller(args);
auto axis = CSSPropertyParsing::consumeAxis(args);
// Try <scroller> again since the order of <scroller> and <axis> is not guaranteed.
if (!scroller)
scroller = CSSPropertyParsing::consumeScroller(args);
// If there are values left to consume, these are not valid <scroller> or <axis> and the function is invalid.
if (args.size())
return nullptr;
return CSSScrollValue::create(WTFMove(scroller), WTFMove(axis));
}
static RefPtr<CSSValue> consumeAnimationTimelineView(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <view()> = view( [ <axis> || <'view-timeline-inset'> ]? )
// <axis> = block | inline | x | y
// <'view-timeline-inset'> = [ [ auto | <length-percentage> ]{1,2} ]#
// https://drafts.csswg.org/scroll-animations-1/#view-notation
if (range.peek().type() != FunctionToken || range.peek().functionId() != CSSValueView)
return nullptr;
auto args = consumeFunction(range);
if (!args.size())
return CSSViewValue::create();
auto axis = CSSPropertyParsing::consumeAxis(args);
auto startInset = CSSPropertyParsing::consumeSingleViewTimelineInset(args, context);
auto endInset = CSSPropertyParsing::consumeSingleViewTimelineInset(args, context);
// Try <axis> again since the order of <axis> and <'view-timeline-inset'> is not guaranteed.
if (!axis)
axis = CSSPropertyParsing::consumeAxis(args);
// If there are values left to consume, these are not valid <axis> or <'view-timeline-inset'> and the function is invalid.
if (args.size())
return nullptr;
return CSSViewValue::create(WTFMove(axis), WTFMove(startInset), WTFMove(endInset));
}
static RefPtr<CSSValue> consumeSingleAnimationTimeline(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <single-animation-timeline> = auto | none | <dashed-ident> | <scroll()> | <view()>
// https://drafts.csswg.org/css-animations-2/#typedef-single-animation-timeline
auto id = range.peek().id();
if (id == CSSValueAuto || id == CSSValueNone)
return consumeIdent(range);
if (auto name = consumeDashedIdent(range))
return name;
if (auto scroll = consumeAnimationTimelineScroll(range, context))
return scroll;
return consumeAnimationTimelineView(range, context);
}
RefPtr<CSSValue> consumeAnimationTimeline(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <animation-timeline> = <single-animation-timeline>#
// https://drafts.csswg.org/css-animations-2/#animation-timeline
return consumeCommaSeparatedListWithSingleValueOptimization(range, [context](CSSParserTokenRange& range) -> RefPtr<CSSValue> {
return consumeSingleAnimationTimeline(range, context);
});
}
RefPtr<CSSValue> consumeViewTimelineInsetListItem(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <view-timeline-inset-item> = <single-view-timeline-inset>{1,2}
// <single-view-timeline-inset> = auto | <length-percentage>
// https://drafts.csswg.org/scroll-animations-1/#propdef-view-timeline-inset
auto startInset = CSSPropertyParsing::consumeSingleViewTimelineInset(range, context);
if (!startInset)
return nullptr;
if (auto endInset = CSSPropertyParsing::consumeSingleViewTimelineInset(range, context)) {
if (endInset != startInset)
return CSSValuePair::createNoncoalescing(startInset.releaseNonNull(), endInset.releaseNonNull());
}
return startInset;
}
RefPtr<CSSValue> consumeViewTimelineInset(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <view-timeline-inset> = <view-timeline-inset-item>#
// https://drafts.csswg.org/scroll-animations-1/#propdef-view-timeline-inset
return consumeCommaSeparatedListWithoutSingleValueOptimization(range, [context](CSSParserTokenRange& range) {
return consumeViewTimelineInsetListItem(range, context);
});
}
bool isAnimationRangeKeyword(CSSValueID id)
{
return identMatches<CSSValueNormal, CSSValueCover, CSSValueContain, CSSValueEntry, CSSValueExit, CSSValueEntryCrossing, CSSValueExitCrossing>(id);
}
RefPtr<CSSValue> consumeAnimationRange(CSSParserTokenRange& range, const CSSParserContext& context, SingleTimelineRange::Type type)
{
// https://drafts.csswg.org/scroll-animations-1/#propdef-animation-range-start
// normal | <length-percentage> | <timeline-range-name> <length-percentage>?
// FIXME: Add extra handling for animation range sequences.
if (auto name = consumeIdent(range)) {
if (name->valueID() == CSSValueNormal)
return name;
if (!isAnimationRangeKeyword(name->valueID()))
return nullptr;
if (auto offset = consumeLengthPercentage(range, context, ValueRange::All, UnitlessQuirk::Forbid)) {
if (SingleTimelineRange::isDefault(*offset, type))
return name;
return CSSValuePair::createNoncoalescing(name.releaseNonNull(), offset.releaseNonNull());
}
return name;
}
return consumeLengthPercentage(range, context, ValueRange::All, UnitlessQuirk::Forbid);
}
RefPtr<CSSValue> consumeAnimationRangeStart(CSSParserTokenRange& range, const CSSParserContext& context)
{
return consumeCommaSeparatedListWithSingleValueOptimization(range, [&](CSSParserTokenRange& range) -> RefPtr<CSSValue> {
return consumeAnimationRange(range, context, SingleTimelineRange::Type::Start);
});
}
RefPtr<CSSValue> consumeAnimationRangeEnd(CSSParserTokenRange& range, const CSSParserContext& context)
{
return consumeCommaSeparatedListWithSingleValueOptimization(range, [&](CSSParserTokenRange& range) -> RefPtr<CSSValue> {
return consumeAnimationRange(range, context, SingleTimelineRange::Type::End);
});
}
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
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