| /* |
| * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>. |
| * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
| * Copyright (C) 2013, 2015 Apple Inc. All rights reserved. |
| * |
| * 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 THE AUTHOR ``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, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * 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 "MediaQueryExp.h" |
| |
| #include "CSSAspectRatioValue.h" |
| #include "CSSParser.h" |
| #include "CSSParserIdioms.h" |
| #include "CSSParserToken.h" |
| #include "CSSPrimitiveValue.h" |
| #include "CSSValueList.h" |
| #include "MediaFeatureNames.h" |
| #include <wtf/text/StringBuilder.h> |
| |
| namespace WebCore { |
| |
| static inline bool featureWithValidIdent(const AtomicString& mediaFeature) |
| { |
| return mediaFeature == MediaFeatureNames::orientation |
| #if ENABLE(VIEW_MODE_CSS_MEDIA) |
| || mediaFeature == MediaFeatureNames::viewMode |
| #endif |
| || mediaFeature == MediaFeatureNames::colorGamut |
| || mediaFeature == MediaFeatureNames::anyHover |
| || mediaFeature == MediaFeatureNames::anyPointer |
| || mediaFeature == MediaFeatureNames::hover |
| || mediaFeature == MediaFeatureNames::invertedColors |
| || mediaFeature == MediaFeatureNames::pointer; |
| } |
| |
| static inline bool featureWithValidDensity(const String& mediaFeature, const CSSParserToken& token) |
| { |
| if ((token.unitType() != CSSPrimitiveValue::UnitTypes::CSS_DPPX && token.unitType() != CSSPrimitiveValue::UnitTypes::CSS_DPI && token.unitType() != CSSPrimitiveValue::UnitTypes::CSS_DPCM) || token.numericValue() <= 0) |
| return false; |
| |
| return mediaFeature == MediaFeatureNames::resolution |
| || mediaFeature == MediaFeatureNames::minResolution |
| || mediaFeature == MediaFeatureNames::maxResolution; |
| } |
| |
| static inline bool featureWithValidPositiveLength(const String& mediaFeature, const CSSParserToken& token) |
| { |
| if (!(CSSPrimitiveValue::isLength(token.unitType()) || (token.type() == NumberToken && !token.numericValue())) || token.numericValue() < 0) |
| return false; |
| |
| |
| return mediaFeature == MediaFeatureNames::height |
| || mediaFeature == MediaFeatureNames::maxHeight |
| || mediaFeature == MediaFeatureNames::minHeight |
| || mediaFeature == MediaFeatureNames::width |
| || mediaFeature == MediaFeatureNames::maxWidth |
| || mediaFeature == MediaFeatureNames::minWidth |
| || mediaFeature == MediaFeatureNames::deviceHeight |
| || mediaFeature == MediaFeatureNames::maxDeviceHeight |
| || mediaFeature == MediaFeatureNames::minDeviceHeight |
| || mediaFeature == MediaFeatureNames::deviceWidth |
| || mediaFeature == MediaFeatureNames::minDeviceWidth |
| || mediaFeature == MediaFeatureNames::maxDeviceWidth; |
| } |
| |
| static inline bool featureWithPositiveInteger(const String& mediaFeature, const CSSParserToken& token) |
| { |
| if (token.numericValueType() != IntegerValueType || token.numericValue() < 0) |
| return false; |
| |
| return mediaFeature == MediaFeatureNames::color |
| || mediaFeature == MediaFeatureNames:: maxColor |
| || mediaFeature == MediaFeatureNames:: minColor |
| || mediaFeature == MediaFeatureNames::colorIndex |
| || mediaFeature == MediaFeatureNames::maxColorIndex |
| || mediaFeature == MediaFeatureNames::minColorIndex |
| || mediaFeature == MediaFeatureNames::monochrome |
| || mediaFeature == MediaFeatureNames::maxMonochrome |
| || mediaFeature == MediaFeatureNames::minMonochrome; |
| } |
| |
| static inline bool featureWithPositiveNumber(const String& mediaFeature, const CSSParserToken& token) |
| { |
| if (token.type() != NumberToken || token.numericValue() < 0) |
| return false; |
| |
| return mediaFeature == MediaFeatureNames::transform3d |
| || mediaFeature == MediaFeatureNames::devicePixelRatio |
| || mediaFeature == MediaFeatureNames::maxDevicePixelRatio |
| || mediaFeature == MediaFeatureNames::minDevicePixelRatio; |
| } |
| |
| static inline bool featureWithZeroOrOne(const String& mediaFeature, const CSSParserToken& token) |
| { |
| if (token.numericValueType() != IntegerValueType || !(token.numericValue() == 1 || !token.numericValue())) |
| return false; |
| |
| return mediaFeature == MediaFeatureNames::grid; |
| } |
| |
| static inline bool isFeatureValidWithIdentifier(const AtomicString& mediaFeature, CSSValueID id) |
| { |
| if (!id) |
| return false; |
| |
| return featureWithValidIdent(mediaFeature); |
| } |
| |
| static inline bool isFeatureValidWithNonNegativeLengthOrNumber(const AtomicString& mediaFeature, const CSSParserValue& value) |
| { |
| if (!(CSSPrimitiveValue::isLength(value.unit) || value.unit == CSSPrimitiveValue::CSS_NUMBER) || value.fValue < 0) |
| return false; |
| |
| return mediaFeature == MediaFeatureNames::height |
| || mediaFeature == MediaFeatureNames::maxHeight |
| || mediaFeature == MediaFeatureNames::minHeight |
| || mediaFeature == MediaFeatureNames::width |
| || mediaFeature == MediaFeatureNames::maxWidth |
| || mediaFeature == MediaFeatureNames::minWidth |
| || mediaFeature == MediaFeatureNames::deviceHeight |
| || mediaFeature == MediaFeatureNames::maxDeviceHeight |
| || mediaFeature == MediaFeatureNames::minDeviceHeight |
| || mediaFeature == MediaFeatureNames::deviceWidth |
| || mediaFeature == MediaFeatureNames::maxDeviceWidth |
| || mediaFeature == MediaFeatureNames::minDeviceWidth; |
| } |
| |
| static inline bool isFeatureValidWithDensity(const AtomicString& mediaFeature, const CSSParserValue& value) |
| { |
| if (!CSSPrimitiveValue::isResolution(value.unit) || value.fValue <= 0) |
| return false; |
| |
| return mediaFeature == MediaFeatureNames::resolution |
| || mediaFeature == MediaFeatureNames::maxResolution |
| || mediaFeature == MediaFeatureNames::minResolution; |
| } |
| |
| static inline bool isFeatureValidWithNonNegativeInteger(const AtomicString& mediaFeature, const CSSParserValue& value) |
| { |
| if (!value.isInt || value.fValue < 0) |
| return false; |
| |
| return mediaFeature == MediaFeatureNames::color |
| || mediaFeature == MediaFeatureNames::maxColor |
| || mediaFeature == MediaFeatureNames::minColor |
| || mediaFeature == MediaFeatureNames::colorIndex |
| || mediaFeature == MediaFeatureNames::maxColorIndex |
| || mediaFeature == MediaFeatureNames::minColorIndex |
| || mediaFeature == MediaFeatureNames::minMonochrome |
| || mediaFeature == MediaFeatureNames::maxMonochrome; |
| } |
| |
| static inline bool isFeatureValidWithNonNegativeNumber(const AtomicString& mediaFeature, const CSSParserValue& value) |
| { |
| if (value.unit != CSSPrimitiveValue::CSS_NUMBER || value.fValue < 0) |
| return false; |
| |
| return mediaFeature == MediaFeatureNames::transform2d |
| || mediaFeature == MediaFeatureNames::transform3d |
| || mediaFeature == MediaFeatureNames::transition |
| || mediaFeature == MediaFeatureNames::animation |
| || mediaFeature == MediaFeatureNames::devicePixelRatio |
| || mediaFeature == MediaFeatureNames::maxDevicePixelRatio |
| || mediaFeature == MediaFeatureNames::minDevicePixelRatio; |
| } |
| |
| static inline bool isFeatureValidWithZeroOrOne(const AtomicString& mediaFeature, const CSSParserValue& value) |
| { |
| if (!value.isInt || !(value.fValue == 1 || !value.fValue)) |
| return false; |
| |
| return mediaFeature == MediaFeatureNames::grid; |
| } |
| |
| static inline bool isAspectRatioFeature(const AtomicString& mediaFeature) |
| { |
| return mediaFeature == MediaFeatureNames::aspectRatio |
| || mediaFeature == MediaFeatureNames::deviceAspectRatio |
| || mediaFeature == MediaFeatureNames::minAspectRatio |
| || mediaFeature == MediaFeatureNames::maxAspectRatio |
| || mediaFeature == MediaFeatureNames::minDeviceAspectRatio |
| || mediaFeature == MediaFeatureNames::maxDeviceAspectRatio; |
| } |
| |
| static inline bool isFeatureValidWithoutValue(const AtomicString& mediaFeature) |
| { |
| // Media features that are prefixed by min/max cannot be used without a value. |
| return mediaFeature == MediaFeatureNames::anyHover |
| || mediaFeature == MediaFeatureNames::anyPointer |
| || mediaFeature == MediaFeatureNames::monochrome |
| || mediaFeature == MediaFeatureNames::color |
| || mediaFeature == MediaFeatureNames::colorIndex |
| || mediaFeature == MediaFeatureNames::grid |
| || mediaFeature == MediaFeatureNames::height |
| || mediaFeature == MediaFeatureNames::width |
| || mediaFeature == MediaFeatureNames::deviceHeight |
| || mediaFeature == MediaFeatureNames::deviceWidth |
| || mediaFeature == MediaFeatureNames::orientation |
| || mediaFeature == MediaFeatureNames::aspectRatio |
| || mediaFeature == MediaFeatureNames::deviceAspectRatio |
| || mediaFeature == MediaFeatureNames::hover |
| || mediaFeature == MediaFeatureNames::transform2d |
| || mediaFeature == MediaFeatureNames::transform3d |
| || mediaFeature == MediaFeatureNames::transition |
| || mediaFeature == MediaFeatureNames::animation |
| || mediaFeature == MediaFeatureNames::invertedColors |
| #if ENABLE(VIEW_MODE_CSS_MEDIA) |
| || mediaFeature == MediaFeatureNames::viewMode |
| #endif |
| || mediaFeature == MediaFeatureNames::pointer |
| || mediaFeature == MediaFeatureNames::devicePixelRatio |
| || mediaFeature == MediaFeatureNames::resolution |
| || mediaFeature == MediaFeatureNames::videoPlayableInline; |
| } |
| |
| static inline bool isFeatureValidWithNumberWithUnit(const AtomicString& mediaFeature, const CSSParserValue& value) |
| { |
| return isFeatureValidWithDensity(mediaFeature, value) || isFeatureValidWithNonNegativeLengthOrNumber(mediaFeature, value); |
| } |
| |
| static inline bool isFeatureValidWithNumber(const AtomicString& mediaFeature, const CSSParserValue& value) |
| { |
| return isFeatureValidWithNonNegativeInteger(mediaFeature, value) || isFeatureValidWithNonNegativeNumber(mediaFeature, value) || isFeatureValidWithZeroOrOne(mediaFeature, value); |
| } |
| |
| static inline bool isSlash(CSSParserValue& value) |
| { |
| return value.unit == CSSParserValue::Operator && value.iValue == '/'; |
| } |
| |
| static inline bool isPositiveIntegerValue(CSSParserValue& value) |
| { |
| return value.unit == CSSPrimitiveValue::CSS_NUMBER && value.fValue > 0 && value.isInt; |
| } |
| |
| MediaQueryExpression::MediaQueryExpression(const AtomicString& mediaFeature, CSSParserValueList* valueList) |
| : m_mediaFeature(mediaFeature) |
| { |
| if (!valueList) { |
| if (isFeatureValidWithoutValue(mediaFeature)) |
| m_isValid = true; |
| } else if (valueList->size() == 1) { |
| auto& value = *valueList->valueAt(0); |
| if (isFeatureValidWithIdentifier(mediaFeature, value.id)) { |
| m_value = CSSPrimitiveValue::createIdentifier(value.id); |
| m_isValid = true; |
| } else if (isFeatureValidWithNumberWithUnit(mediaFeature, value) || isFeatureValidWithNonNegativeLengthOrNumber(mediaFeature, value)) { |
| m_value = CSSPrimitiveValue::create(value.fValue, (CSSPrimitiveValue::UnitTypes) value.unit); |
| m_isValid = true; |
| } else if (isFeatureValidWithNumber(mediaFeature, value)) { |
| // FIXME: Can we merge this with the case above? |
| m_value = CSSPrimitiveValue::create(value.fValue, CSSPrimitiveValue::CSS_NUMBER); |
| m_isValid = true; |
| } |
| } else if (valueList->size() == 3 && isAspectRatioFeature(mediaFeature)) { |
| auto& numerator = *valueList->valueAt(0); |
| auto& slash = *valueList->valueAt(1); |
| auto& denominator = *valueList->valueAt(2); |
| if (isPositiveIntegerValue(numerator) && isSlash(slash) && isPositiveIntegerValue(denominator)) { |
| m_value = CSSAspectRatioValue::create(numerator.fValue, denominator.fValue); |
| m_isValid = true; |
| } |
| } |
| } |
| |
| MediaQueryExpression::MediaQueryExpression(const String& feature, const Vector<CSSParserToken, 4>& tokenList) |
| : m_mediaFeature(feature) |
| , m_isValid(false) |
| { |
| // Create value for media query expression that must have 1 or more values. |
| if (!tokenList.size() && isFeatureValidWithoutValue(m_mediaFeature)) { |
| // Valid, creates a MediaQueryExp with an 'invalid' MediaQueryExpValue |
| m_isValid = true; |
| } else if (tokenList.size() == 1) { |
| CSSParserToken token = tokenList.first(); |
| if (token.type() == IdentToken) { |
| CSSValueID ident = token.id(); |
| if (!featureWithValidIdent(m_mediaFeature)) |
| return; |
| m_value = CSSPrimitiveValue::createIdentifier(ident); |
| m_isValid = true; |
| } else if (token.type() == NumberToken || token.type() == PercentageToken || token.type() == DimensionToken) { |
| // Check for numeric token types since it is only safe for these types to call numericValue. |
| if (featureWithValidDensity(m_mediaFeature, token) |
| || featureWithValidPositiveLength(m_mediaFeature, token)) { |
| // Media features that must have non-negative <density>, ie. dppx, dpi or dpcm, |
| // or Media features that must have non-negative <length> or number value. |
| m_value = CSSPrimitiveValue::create(token.numericValue(), (CSSPrimitiveValue::UnitTypes) token.unitType()); |
| m_isValid = true; |
| } else if (featureWithPositiveInteger(m_mediaFeature, token) |
| || featureWithPositiveNumber(m_mediaFeature, token) |
| || featureWithZeroOrOne(m_mediaFeature, token)) { |
| // Media features that must have non-negative integer value, |
| // or media features that must have non-negative number value, |
| // or media features that must have (0|1) value. |
| m_value = CSSPrimitiveValue::create(token.numericValue(), CSSPrimitiveValue::UnitTypes::CSS_NUMBER); |
| m_isValid = true; |
| } |
| } |
| } else if (tokenList.size() == 3 && isAspectRatioFeature(m_mediaFeature)) { |
| // FIXME: <ratio> is supposed to allow whitespace around the '/' |
| // Applicable to device-aspect-ratio and aspect-ratio. |
| const CSSParserToken& numerator = tokenList[0]; |
| const CSSParserToken& delimiter = tokenList[1]; |
| const CSSParserToken& denominator = tokenList[2]; |
| if (delimiter.type() != DelimiterToken || delimiter.delimiter() != '/') |
| return; |
| if (numerator.type() != NumberToken || numerator.numericValue() <= 0 || numerator.numericValueType() != IntegerValueType) |
| return; |
| if (denominator.type() != NumberToken || denominator.numericValue() <= 0 || denominator.numericValueType() != IntegerValueType) |
| return; |
| |
| m_value = CSSAspectRatioValue::create(numerator.numericValue(), denominator.numericValue()); |
| m_isValid = true; |
| |
| } |
| } |
| |
| String MediaQueryExpression::serialize() const |
| { |
| if (!m_serializationCache.isNull()) |
| return m_serializationCache; |
| |
| StringBuilder result; |
| result.append('('); |
| result.append(m_mediaFeature.convertToASCIILowercase()); |
| if (m_value) { |
| result.appendLiteral(": "); |
| result.append(m_value->cssText()); |
| } |
| result.append(')'); |
| |
| m_serializationCache = result.toString(); |
| return m_serializationCache; |
| } |
| |
| } // namespace |