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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+Display.h"
#include "CSSParserContext.h"
#include "CSSParserMode.h"
#include "CSSParserTokenRange.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertyParserConsumer+Ident.h"
#include "CSSValueKeywords.h"
namespace WebCore {
namespace CSSPropertyParserHelpers {
// Keep in sync with the single keyword value fast path of CSSParserFastPaths's parseDisplay.
RefPtr<CSSValue> consumeDisplay(CSSParserTokenRange& range, const CSSParserContext& context)
{
// <'display'> = [ <display-outside> || <display-inside> ] | <display-listitem> | <display-internal> | <display-box> | <display-legacy>
// <display-outside> = block | inline | run-in
// <display-inside> = flow | flow-root | table | flex | grid | ruby
// <display-listitem> = <display-outside>? && [ flow | flow-root ]? && list-item
// <display-internal> = table-row-group | table-header-group |
// table-footer-group | table-row | table-cell |
// table-column-group | table-column | table-caption |
// ruby-base | ruby-text | ruby-base-container |
// ruby-text-container
// <display-box> = contents | none
// <display-legacy> = inline-block | inline-table | inline-flex | inline-grid
// https://drafts.csswg.org/css-display/#propdef-display
// Parse single keyword values
auto singleKeyword = consumeIdent<
// <display-box>
CSSValueContents,
CSSValueNone,
// <display-internal>
CSSValueTableCaption,
CSSValueTableCell,
CSSValueTableColumnGroup,
CSSValueTableColumn,
CSSValueTableHeaderGroup,
CSSValueTableFooterGroup,
CSSValueTableRow,
CSSValueTableRowGroup,
CSSValueRubyBase,
CSSValueRubyText,
// <display-legacy>
CSSValueInlineBlock,
CSSValueInlineFlex,
CSSValueInlineGrid,
CSSValueInlineTable,
// Prefixed values
CSSValueWebkitInlineBox,
CSSValueWebkitBox,
// No layout support for the full <display-listitem> syntax, so treat it as <display-legacy>
CSSValueListItem
>(range);
auto allowsValue = [&](CSSValueID value) {
bool isRuby = value == CSSValueRubyBase || value == CSSValueRubyText || value == CSSValueBlockRuby || value == CSSValueRuby;
return !isRuby || isUASheetBehavior(context.mode);
};
if (singleKeyword) {
if (!allowsValue(singleKeyword->valueID()))
return nullptr;
return singleKeyword;
}
// Empty value, stop parsing
if (range.atEnd())
return nullptr;
// Convert -webkit-flex/-webkit-inline-flex to flex/inline-flex
CSSValueID nextValueID = range.peek().id();
if (nextValueID == CSSValueWebkitInlineFlex || nextValueID == CSSValueWebkitFlex) {
consumeIdent(range);
return CSSPrimitiveValue::create(
nextValueID == CSSValueWebkitInlineFlex ? CSSValueInlineFlex : CSSValueFlex);
}
// Parse [ <display-outside> || <display-inside> ]
std::optional<CSSValueID> parsedDisplayOutside;
std::optional<CSSValueID> parsedDisplayInside;
while (!range.atEnd()) {
auto nextValueID = range.peek().id();
switch (nextValueID) {
// <display-outside>
case CSSValueBlock:
case CSSValueInline:
if (parsedDisplayOutside)
return nullptr;
parsedDisplayOutside = nextValueID;
break;
// <display-inside>
case CSSValueFlex:
case CSSValueFlow:
case CSSValueFlowRoot:
case CSSValueGrid:
case CSSValueTable:
case CSSValueRuby:
if (parsedDisplayInside)
return nullptr;
parsedDisplayInside = nextValueID;
break;
default:
return nullptr;
}
consumeIdent(range);
}
// Set defaults when one of the two values are unspecified
CSSValueID displayInside = parsedDisplayInside.value_or(CSSValueFlow);
auto selectShortValue = [&]() -> CSSValueID {
if (!parsedDisplayOutside || *parsedDisplayOutside == CSSValueInline) {
if (displayInside == CSSValueRuby)
return CSSValueRuby;
}
if (!parsedDisplayOutside || *parsedDisplayOutside == CSSValueBlock) {
// Alias display: flow to display: block
if (displayInside == CSSValueFlow)
return CSSValueBlock;
if (displayInside == CSSValueRuby)
return CSSValueBlockRuby;
return displayInside;
}
// Convert `display: inline <display-inside>` to the equivalent short value
switch (displayInside) {
case CSSValueFlex:
return CSSValueInlineFlex;
case CSSValueFlow:
return CSSValueInline;
case CSSValueFlowRoot:
return CSSValueInlineBlock;
case CSSValueGrid:
return CSSValueInlineGrid;
case CSSValueTable:
return CSSValueInlineTable;
default:
ASSERT_NOT_REACHED();
return CSSValueInline;
}
};
auto shortValue = selectShortValue();
if (!allowsValue(shortValue))
return nullptr;
return CSSPrimitiveValue::create(shortValue);
}
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
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