225 lines
11 KiB
C++
225 lines
11 KiB
C++
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Copyright (C) 2016 Apple Inc. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include "CSSFunctionValue.h"
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#include "CSSParserContext.h"
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#include "CSSParserTokenRange.h"
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#include "CSSPrimitiveValue.h"
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#include "CSSShadowValue.h"
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#include "CSSValuePool.h"
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#include "Length.h" // For ValueRange
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#include <wtf/OptionSet.h>
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#include <wtf/Variant.h>
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#include <wtf/Vector.h>
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namespace WebCore {
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namespace WebKitFontFamilyNames {
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enum class FamilyNamesIndex;
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}
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// When these functions are successful, they will consume all the relevant
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// tokens from the range and also consume any whitespace which follows. When
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// the start of the range doesn't match the type we're looking for, the range
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// will not be modified.
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namespace CSSPropertyParserHelpers {
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// FIXME: These should probably just be consumeComma and consumeSlash.
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bool consumeCommaIncludingWhitespace(CSSParserTokenRange&);
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bool consumeSlashIncludingWhitespace(CSSParserTokenRange&);
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// consumeFunction expects the range starts with a FunctionToken.
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CSSParserTokenRange consumeFunction(CSSParserTokenRange&);
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enum class UnitlessQuirk { Allow, Forbid };
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enum class UnitlessZeroQuirk { Allow, Forbid };
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enum class AllowXResolutionUnit { Allow, Forbid };
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struct AngleRaw {
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CSSUnitType type;
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double value;
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};
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struct LengthRaw {
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CSSUnitType type;
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double value;
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};
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using LengthOrPercentRaw = Variant<LengthRaw, double>;
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std::optional<int> consumeIntegerRaw(CSSParserTokenRange&, double minimumValue = -std::numeric_limits<double>::max());
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RefPtr<CSSPrimitiveValue> consumeInteger(CSSParserTokenRange&, double minimumValue = -std::numeric_limits<double>::max());
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std::optional<unsigned> consumePositiveIntegerRaw(CSSParserTokenRange&);
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RefPtr<CSSPrimitiveValue> consumePositiveInteger(CSSParserTokenRange&);
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std::optional<double> consumeNumberRaw(CSSParserTokenRange&, ValueRange = ValueRange::All);
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RefPtr<CSSPrimitiveValue> consumeNumber(CSSParserTokenRange&, ValueRange);
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std::optional<double> consumeFontWeightNumberRaw(CSSParserTokenRange&);
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RefPtr<CSSPrimitiveValue> consumeFontWeightNumber(CSSParserTokenRange&);
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RefPtr<CSSPrimitiveValue> consumeFontWeightNumberWorkerSafe(CSSParserTokenRange&, CSSValuePool&);
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std::optional<LengthRaw> consumeLengthRaw(CSSParserTokenRange&, CSSParserMode, ValueRange, UnitlessQuirk = UnitlessQuirk::Forbid);
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RefPtr<CSSPrimitiveValue> consumeLength(CSSParserTokenRange&, CSSParserMode, ValueRange, UnitlessQuirk = UnitlessQuirk::Forbid);
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std::optional<double> consumePercentRaw(CSSParserTokenRange&, ValueRange = ValueRange::All);
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RefPtr<CSSPrimitiveValue> consumePercent(CSSParserTokenRange&, ValueRange);
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RefPtr<CSSPrimitiveValue> consumePercentWorkerSafe(CSSParserTokenRange&, ValueRange, CSSValuePool&);
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std::optional<LengthOrPercentRaw> consumeLengthOrPercentRaw(CSSParserTokenRange&, CSSParserMode, ValueRange, UnitlessQuirk = UnitlessQuirk::Forbid);
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RefPtr<CSSPrimitiveValue> consumeLengthOrPercent(CSSParserTokenRange&, CSSParserMode, ValueRange, UnitlessQuirk = UnitlessQuirk::Forbid);
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std::optional<AngleRaw> consumeAngleRaw(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk = UnitlessQuirk::Forbid, UnitlessZeroQuirk = UnitlessZeroQuirk::Forbid);
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RefPtr<CSSPrimitiveValue> consumeAngle(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk = UnitlessQuirk::Forbid, UnitlessZeroQuirk = UnitlessZeroQuirk::Forbid);
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RefPtr<CSSPrimitiveValue> consumeAngleWorkerSafe(CSSParserTokenRange&, CSSParserMode, CSSValuePool&, UnitlessQuirk = UnitlessQuirk::Forbid, UnitlessZeroQuirk = UnitlessZeroQuirk::Forbid);
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RefPtr<CSSPrimitiveValue> consumeTime(CSSParserTokenRange&, CSSParserMode, ValueRange, UnitlessQuirk = UnitlessQuirk::Forbid);
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RefPtr<CSSPrimitiveValue> consumeResolution(CSSParserTokenRange&, AllowXResolutionUnit = AllowXResolutionUnit::Forbid);
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std::optional<CSSValueID> consumeIdentRaw(CSSParserTokenRange&);
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RefPtr<CSSPrimitiveValue> consumeIdent(CSSParserTokenRange&);
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RefPtr<CSSPrimitiveValue> consumeIdentWorkerSafe(CSSParserTokenRange&, CSSValuePool&);
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std::optional<CSSValueID> consumeIdentRangeRaw(CSSParserTokenRange&, CSSValueID lower, CSSValueID upper);
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RefPtr<CSSPrimitiveValue> consumeIdentRange(CSSParserTokenRange&, CSSValueID lower, CSSValueID upper);
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template<CSSValueID, CSSValueID...> inline bool identMatches(CSSValueID id);
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template<CSSValueID... allowedIdents> std::optional<CSSValueID> consumeIdentRaw(CSSParserTokenRange&);
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template<CSSValueID... allowedIdents> RefPtr<CSSPrimitiveValue> consumeIdent(CSSParserTokenRange&);
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template<CSSValueID... allowedIdents> RefPtr<CSSPrimitiveValue> consumeIdentWorkerSafe(CSSParserTokenRange&, CSSValuePool&);
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RefPtr<CSSPrimitiveValue> consumeCustomIdent(CSSParserTokenRange&, bool shouldLowercase = false);
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RefPtr<CSSPrimitiveValue> consumeString(CSSParserTokenRange&);
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StringView consumeUrlAsStringView(CSSParserTokenRange&);
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RefPtr<CSSPrimitiveValue> consumeUrl(CSSParserTokenRange&);
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Color consumeColorWorkerSafe(CSSParserTokenRange&, const CSSParserContext&);
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RefPtr<CSSPrimitiveValue> consumeColor(CSSParserTokenRange&, const CSSParserContext&, bool acceptQuirkyColors = false);
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enum class PositionSyntax {
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Position, // <position>
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BackgroundPosition // <bg-position>
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};
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struct PositionCoordinates {
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Ref<CSSPrimitiveValue> x;
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Ref<CSSPrimitiveValue> y;
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};
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RefPtr<CSSPrimitiveValue> consumePosition(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk, PositionSyntax);
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std::optional<PositionCoordinates> consumePositionCoordinates(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk, PositionSyntax);
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std::optional<PositionCoordinates> consumeOneOrTwoValuedPositionCoordinates(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk);
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enum class AllowedImageType : uint8_t {
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URLFunction = 1 << 0,
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RawStringAsURL = 1 << 1,
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ImageSet = 1 << 2,
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GeneratedImage = 1 << 3
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};
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RefPtr<CSSValue> consumeImage(CSSParserTokenRange&, const CSSParserContext&, OptionSet<AllowedImageType> = { AllowedImageType::URLFunction, AllowedImageType::ImageSet, AllowedImageType::GeneratedImage });
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RefPtr<CSSValue> consumeImageOrNone(CSSParserTokenRange&, const CSSParserContext&);
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enum class AllowedFilterFunctions {
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PixelFilters,
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ColorFilters
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};
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RefPtr<CSSValue> consumeFilter(CSSParserTokenRange&, const CSSParserContext&, AllowedFilterFunctions);
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RefPtr<CSSShadowValue> consumeSingleShadow(CSSParserTokenRange&, const CSSParserContext&, bool allowInset, bool allowSpread);
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struct FontStyleRaw {
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CSSValueID style;
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std::optional<AngleRaw> angle;
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};
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using FontWeightRaw = Variant<CSSValueID, double>;
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using FontSizeRaw = Variant<CSSValueID, CSSPropertyParserHelpers::LengthOrPercentRaw>;
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using LineHeightRaw = Variant<CSSValueID, double, CSSPropertyParserHelpers::LengthOrPercentRaw>;
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using FontFamilyRaw = Variant<CSSValueID, String>;
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struct FontRaw {
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std::optional<FontStyleRaw> style;
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std::optional<CSSValueID> variantCaps;
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std::optional<FontWeightRaw> weight;
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std::optional<CSSValueID> stretch;
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FontSizeRaw size;
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std::optional<LineHeightRaw> lineHeight;
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Vector<FontFamilyRaw> family;
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};
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bool isPredefinedCounterStyle(CSSValueID);
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RefPtr<CSSPrimitiveValue> consumeCounterStyleName(CSSParserTokenRange&);
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AtomString consumeCounterStyleNameInPrelude(CSSParserTokenRange&);
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std::optional<CSSValueID> consumeFontVariantCSS21Raw(CSSParserTokenRange&);
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std::optional<CSSValueID> consumeFontWeightKeywordValueRaw(CSSParserTokenRange&);
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std::optional<FontWeightRaw> consumeFontWeightRaw(CSSParserTokenRange&);
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std::optional<CSSValueID> consumeFontStretchKeywordValueRaw(CSSParserTokenRange&);
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std::optional<CSSValueID> consumeFontStyleKeywordValueRaw(CSSParserTokenRange&);
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std::optional<FontStyleRaw> consumeFontStyleRaw(CSSParserTokenRange&, CSSParserMode);
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String concatenateFamilyName(CSSParserTokenRange&);
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String consumeFamilyNameRaw(CSSParserTokenRange&);
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std::optional<CSSValueID> consumeGenericFamilyRaw(CSSParserTokenRange&);
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std::optional<Vector<FontFamilyRaw>> consumeFontFamilyRaw(CSSParserTokenRange&);
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std::optional<FontSizeRaw> consumeFontSizeRaw(CSSParserTokenRange&, CSSParserMode, UnitlessQuirk = UnitlessQuirk::Forbid);
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std::optional<LineHeightRaw> consumeLineHeightRaw(CSSParserTokenRange&, CSSParserMode);
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std::optional<FontRaw> consumeFontRaw(CSSParserTokenRange&, CSSParserMode);
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const AtomString& genericFontFamily(CSSValueID);
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WebKitFontFamilyNames::FamilyNamesIndex genericFontFamilyIndex(CSSValueID);
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bool isFontStyleAngleInRange(double angleInDegrees);
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// Template and inline implementations are at the bottom of the file for readability.
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template<typename... emptyBaseCase> inline bool identMatches(CSSValueID) { return false; }
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template<CSSValueID head, CSSValueID... tail> inline bool identMatches(CSSValueID id)
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{
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return id == head || identMatches<tail...>(id);
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}
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template<CSSValueID... names> std::optional<CSSValueID> consumeIdentRaw(CSSParserTokenRange& range)
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{
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if (range.peek().type() != IdentToken || !identMatches<names...>(range.peek().id()))
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return std::nullopt;
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return range.consumeIncludingWhitespace().id();
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}
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template<CSSValueID... names> RefPtr<CSSPrimitiveValue> consumeIdent(CSSParserTokenRange& range)
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{
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return consumeIdentWorkerSafe<names...>(range, CSSValuePool::singleton());
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}
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template<CSSValueID... names> RefPtr<CSSPrimitiveValue> consumeIdentWorkerSafe(CSSParserTokenRange& range, CSSValuePool& cssValuePool)
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{
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if (range.peek().type() != IdentToken || !identMatches<names...>(range.peek().id()))
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return nullptr;
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return cssValuePool.createIdentifierValue(range.consumeIncludingWhitespace().id());
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}
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inline bool isFontStyleAngleInRange(double angleInDegrees)
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{
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return angleInDegrees > -90 && angleInDegrees < 90;
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}
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} // namespace CSSPropertyParserHelpers
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} // namespace WebCore
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