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-/*
- * CSS Media Query
- *
- * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
- * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
- * Copyright (C) 2013 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 COMPUTER, 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 "CSSPrimitiveValue.h"
-#include "CSSValueList.h"
-#include <wtf/text/StringBuilder.h>
-
-namespace WebCore {
-
-static inline bool featureWithCSSValueID(const AtomicString& mediaFeature, const CSSParserValue* value)
-{
- if (!value->id)
- return false;
-
- return mediaFeature == MediaFeatureNames::orientationMediaFeature
-#if ENABLE(VIEW_MODE_CSS_MEDIA)
- || mediaFeature == MediaFeatureNames::view_modeMediaFeature
-#endif // ENABLE(VIEW_MODE_CSS_MEDIA)
- || mediaFeature == MediaFeatureNames::pointerMediaFeature;
-}
-
-static inline bool featureWithValidPositiveLenghtOrNumber(const AtomicString& mediaFeature, const CSSParserValue* value)
-{
- if (!(((value->unit >= CSSPrimitiveValue::CSS_EMS && value->unit <= CSSPrimitiveValue::CSS_PC) || value->unit == CSSPrimitiveValue::CSS_REMS) || value->unit == CSSPrimitiveValue::CSS_NUMBER) || value->fValue < 0)
- return false;
-
- return mediaFeature == MediaFeatureNames::heightMediaFeature
- || mediaFeature == MediaFeatureNames::max_heightMediaFeature
- || mediaFeature == MediaFeatureNames::min_heightMediaFeature
- || mediaFeature == MediaFeatureNames::widthMediaFeature
- || mediaFeature == MediaFeatureNames::max_widthMediaFeature
- || mediaFeature == MediaFeatureNames::min_widthMediaFeature
- || mediaFeature == MediaFeatureNames::device_heightMediaFeature
- || mediaFeature == MediaFeatureNames::max_device_heightMediaFeature
- || mediaFeature == MediaFeatureNames::min_device_heightMediaFeature
- || mediaFeature == MediaFeatureNames::device_widthMediaFeature
- || mediaFeature == MediaFeatureNames::max_device_widthMediaFeature
- || mediaFeature == MediaFeatureNames::min_device_widthMediaFeature;
-}
-
-static inline bool featureWithValidDensity(const AtomicString& mediaFeature, const CSSParserValue* value)
-{
- if ((value->unit != CSSPrimitiveValue::CSS_DPPX && value->unit != CSSPrimitiveValue::CSS_DPI && value->unit != CSSPrimitiveValue::CSS_DPCM) || value->fValue <= 0)
- return false;
-
- return mediaFeature == MediaFeatureNames::resolutionMediaFeature
- || mediaFeature == MediaFeatureNames::max_resolutionMediaFeature
- || mediaFeature == MediaFeatureNames::min_resolutionMediaFeature;
-}
-
-static inline bool featureWithPositiveInteger(const AtomicString& mediaFeature, const CSSParserValue* value)
-{
- if (!value->isInt || value->fValue < 0)
- return false;
-
- return mediaFeature == MediaFeatureNames::colorMediaFeature
- || mediaFeature == MediaFeatureNames::max_colorMediaFeature
- || mediaFeature == MediaFeatureNames::min_colorMediaFeature
- || mediaFeature == MediaFeatureNames::color_indexMediaFeature
- || mediaFeature == MediaFeatureNames::max_color_indexMediaFeature
- || mediaFeature == MediaFeatureNames::min_color_indexMediaFeature
- || mediaFeature == MediaFeatureNames::min_monochromeMediaFeature
- || mediaFeature == MediaFeatureNames::max_monochromeMediaFeature;
-}
-
-static inline bool featureWithPositiveNumber(const AtomicString& mediaFeature, const CSSParserValue* value)
-{
- if (value->unit != CSSPrimitiveValue::CSS_NUMBER || value->fValue < 0)
- return false;
-
- return mediaFeature == MediaFeatureNames::transform_2dMediaFeature
- || mediaFeature == MediaFeatureNames::transform_3dMediaFeature
- || mediaFeature == MediaFeatureNames::transitionMediaFeature
- || mediaFeature == MediaFeatureNames::animationMediaFeature
- || mediaFeature == MediaFeatureNames::device_pixel_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::max_device_pixel_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::min_device_pixel_ratioMediaFeature;
-}
-
-static inline bool featureWithZeroOrOne(const AtomicString& mediaFeature, const CSSParserValue* value)
-{
- if (!value->isInt || !(value->fValue == 1 || !value->fValue))
- return false;
-
- return mediaFeature == MediaFeatureNames::gridMediaFeature
- || mediaFeature == MediaFeatureNames::hoverMediaFeature;
-}
-
-static inline bool featureWithAspectRatio(const AtomicString& mediaFeature)
-{
- return mediaFeature == MediaFeatureNames::aspect_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::device_aspect_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::min_aspect_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::max_aspect_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::min_device_aspect_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::max_device_aspect_ratioMediaFeature;
-}
-
-static inline bool featureWithoutValue(const AtomicString& mediaFeature)
-{
- // Media features that are prefixed by min/max cannot be used without a value.
- return mediaFeature == MediaFeatureNames::monochromeMediaFeature
- || mediaFeature == MediaFeatureNames::colorMediaFeature
- || mediaFeature == MediaFeatureNames::color_indexMediaFeature
- || mediaFeature == MediaFeatureNames::gridMediaFeature
- || mediaFeature == MediaFeatureNames::heightMediaFeature
- || mediaFeature == MediaFeatureNames::widthMediaFeature
- || mediaFeature == MediaFeatureNames::device_heightMediaFeature
- || mediaFeature == MediaFeatureNames::device_widthMediaFeature
- || mediaFeature == MediaFeatureNames::orientationMediaFeature
- || mediaFeature == MediaFeatureNames::aspect_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::device_aspect_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::hoverMediaFeature
- || mediaFeature == MediaFeatureNames::transform_2dMediaFeature
- || mediaFeature == MediaFeatureNames::transform_3dMediaFeature
- || mediaFeature == MediaFeatureNames::transitionMediaFeature
- || mediaFeature == MediaFeatureNames::animationMediaFeature
-#if ENABLE(VIEW_MODE_CSS_MEDIA)
- || mediaFeature == MediaFeatureNames::view_modeMediaFeature
-#endif // ENABLE(VIEW_MODE_CSS_MEDIA)
- || mediaFeature == MediaFeatureNames::pointerMediaFeature
- || mediaFeature == MediaFeatureNames::device_pixel_ratioMediaFeature
- || mediaFeature == MediaFeatureNames::resolutionMediaFeature;
-}
-
-inline MediaQueryExp::MediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* valueList)
- : m_mediaFeature(mediaFeature)
- , m_value(0)
- , m_isValid(false)
-{
- // Initialize media query expression that must have 1 or more values.
- if (valueList) {
- if (valueList->size() == 1) {
- CSSParserValue* value = valueList->current();
-
- // Media features that use CSSValueIDs.
- if (featureWithCSSValueID(mediaFeature, value))
- m_value = CSSPrimitiveValue::createIdentifier(value->id);
-
- // Media features that must have non-negative <density>, ie. dppx, dpi or dpcm.
- else if (featureWithValidDensity(mediaFeature, value))
- m_value = CSSPrimitiveValue::create(value->fValue, (CSSPrimitiveValue::UnitTypes) value->unit);
-
- // Media features that must have non-negative <lenght> or number value.
- else if (featureWithValidPositiveLenghtOrNumber(mediaFeature, value))
- m_value = CSSPrimitiveValue::create(value->fValue, (CSSPrimitiveValue::UnitTypes) value->unit);
-
- // Media features that must have non-negative integer value.
- else if (featureWithPositiveInteger(mediaFeature, value))
- m_value = CSSPrimitiveValue::create(value->fValue, CSSPrimitiveValue::CSS_NUMBER);
-
- // Media features that must have non-negative number value.
- else if (featureWithPositiveNumber(mediaFeature, value))
- m_value = CSSPrimitiveValue::create(value->fValue, CSSPrimitiveValue::CSS_NUMBER);
-
- // Media features that must have (0|1) value.
- else if (featureWithZeroOrOne(mediaFeature, value))
- m_value = CSSPrimitiveValue::create(value->fValue, CSSPrimitiveValue::CSS_NUMBER);
-
- m_isValid = m_value;
- } else if (valueList->size() == 3 && featureWithAspectRatio(mediaFeature)) {
- // Create list of values.
- // Currently accepts only <integer>/<integer>.
- // Applicable to device-aspect-ratio and aspec-ratio.
- bool isValid = true;
- float numeratorValue = 0;
- float denominatorValue = 0;
-
- // The aspect-ratio must be <integer> (whitespace)? / (whitespace)? <integer>.
- for (unsigned i = 0; i < 3; ++i, valueList->next()) {
- const CSSParserValue* value = valueList->current();
- if (i != 1 && value->unit == CSSPrimitiveValue::CSS_NUMBER && value->fValue > 0 && value->isInt) {
- if (!i)
- numeratorValue = value->fValue;
- else
- denominatorValue = value->fValue;
- } else if (i == 1 && value->unit == CSSParserValue::Operator && value->iValue == '/')
- continue;
- else {
- isValid = false;
- break;
- }
- }
-
- if (isValid)
- m_value = CSSAspectRatioValue::create(numeratorValue, denominatorValue);
-
- m_isValid = m_value;
- }
- } else if (featureWithoutValue(mediaFeature))
- m_isValid = true;
-}
-
-PassOwnPtr<MediaQueryExp> MediaQueryExp::create(const AtomicString& mediaFeature, CSSParserValueList* values)
-{
- return adoptPtr(new MediaQueryExp(mediaFeature, values));
-}
-
-MediaQueryExp::~MediaQueryExp()
-{
-}
-
-String MediaQueryExp::serialize() const
-{
- if (!m_serializationCache.isNull())
- return m_serializationCache;
-
- StringBuilder result;
- result.append('(');
- result.append(m_mediaFeature.lower());
- if (m_value) {
- result.appendLiteral(": ");
- result.append(m_value->cssText());
- }
- result.append(')');
-
- const_cast<MediaQueryExp*>(this)->m_serializationCache = result.toString();
- return m_serializationCache;
-}
-
-} // namespace