csscomputedstyledeclaration.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2004 Zack Rusin <[e-mail]>
 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2007 Alexey Proskuryakov <[e-mail]>
 * Copyright (C) 2007 Nicholas Shanks <[e-mail]>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301  USA
 */

#include "config.h"
#include "CSSComputedStyleDeclaration.h"

#include "AnimationController.h"
#include "CSSBorderImageValue.h"
#include "CSSMutableStyleDeclaration.h"
#include "CSSPrimitiveValue.h"
#include "CSSPrimitiveValueMappings.h"
#include "CSSPropertyNames.h"
#include "CSSReflectValue.h"
#include "CSSTimingFunctionValue.h"
#include "CSSValueList.h"
#include "CachedImage.h"
#include "Document.h"
#include "ExceptionCode.h"
#include "Pair.h"
#include "Rect.h"
#include "RenderBox.h"
#include "RenderLayer.h"
#include "ShadowValue.h"
#include "WebKitCSSTransformValue.h"


#if ENABLE(DASHBOARD_SUPPORT)
#include "DashboardRegion.h"
#endif

namespace WebCore {

// List of all properties we know how to compute, omitting shorthands.
static const int computedProperties[] = {
    CSSPropertyBackgroundAttachment,
    CSSPropertyBackgroundColor,
    CSSPropertyBackgroundImage,
    // more specific background-position-x/y are non-standard
    CSSPropertyBackgroundPosition,
    CSSPropertyBackgroundRepeat,
    CSSPropertyBorderBottomColor,
    CSSPropertyBorderBottomStyle,
    CSSPropertyBorderBottomWidth,
    CSSPropertyBorderCollapse,
    CSSPropertyBorderLeftColor,
    CSSPropertyBorderLeftStyle,
    CSSPropertyBorderLeftWidth,
    CSSPropertyBorderRightColor,
    CSSPropertyBorderRightStyle,
    CSSPropertyBorderRightWidth,
    CSSPropertyBorderTopColor,
    CSSPropertyBorderTopStyle,
    CSSPropertyBorderTopWidth,
    CSSPropertyBottom,
    CSSPropertyCaptionSide,
    CSSPropertyClear,
    CSSPropertyColor,
    CSSPropertyCursor,
    CSSPropertyDirection,
    CSSPropertyDisplay,
    CSSPropertyEmptyCells,
    CSSPropertyFloat,
    CSSPropertyFontFamily,
    CSSPropertyFontSize,
    CSSPropertyFontStyle,
    CSSPropertyFontVariant,
    CSSPropertyFontWeight,
    CSSPropertyHeight,
    CSSPropertyLeft,
    CSSPropertyLetterSpacing,
    CSSPropertyLineHeight,
    CSSPropertyListStyleImage,
    CSSPropertyListStylePosition,
    CSSPropertyListStyleType,
    CSSPropertyMarginBottom,
    CSSPropertyMarginLeft,
    CSSPropertyMarginRight,
    CSSPropertyMarginTop,
    CSSPropertyMaxHeight,
    CSSPropertyMaxWidth,
    CSSPropertyMinHeight,
    CSSPropertyMinWidth,
    CSSPropertyOpacity,
    CSSPropertyOrphans,
    CSSPropertyOutlineColor,
    CSSPropertyOutlineStyle,
    CSSPropertyOutlineWidth,
    CSSPropertyOverflowX,
    CSSPropertyOverflowY,
    CSSPropertyPaddingBottom,
    CSSPropertyPaddingLeft,
    CSSPropertyPaddingRight,
    CSSPropertyPaddingTop,
    CSSPropertyPageBreakAfter,
    CSSPropertyPageBreakBefore,
    CSSPropertyPageBreakInside,
    CSSPropertyPointerEvents,
    CSSPropertyPosition,
    CSSPropertyResize,
    CSSPropertyRight,
    CSSPropertyTableLayout,
    CSSPropertyTextAlign,
    CSSPropertyTextDecoration,
    CSSPropertyTextIndent,
    CSSPropertyTextShadow,
    CSSPropertyTextTransform,
    CSSPropertyTop,
    CSSPropertyUnicodeBidi,
    CSSPropertyVerticalAlign,
    CSSPropertyVisibility,
    CSSPropertyWhiteSpace,
    CSSPropertyWidows,
    CSSPropertyWidth,
    CSSPropertyWordSpacing,
    CSSPropertyWordWrap,
    CSSPropertyZIndex,
    CSSPropertyZoom,

    CSSPropertyWebkitAnimationDelay,
    CSSPropertyWebkitAnimationDirection,
    CSSPropertyWebkitAnimationDuration,
    CSSPropertyWebkitAnimationIterationCount,
    CSSPropertyWebkitAnimationName,
    CSSPropertyWebkitAnimationTimingFunction,
    CSSPropertyWebkitAppearance,
    CSSPropertyWebkitBackfaceVisibility,
    CSSPropertyWebkitBackgroundClip,
    CSSPropertyWebkitBackgroundComposite,
    CSSPropertyWebkitBackgroundOrigin,
    CSSPropertyWebkitBackgroundSize,
    CSSPropertyWebkitBorderFit,
    CSSPropertyWebkitBorderImage,
    CSSPropertyWebkitBorderHorizontalSpacing,
    CSSPropertyWebkitBorderVerticalSpacing,
    CSSPropertyWebkitBoxAlign,
    CSSPropertyWebkitBoxDirection,
    CSSPropertyWebkitBoxFlex,
    CSSPropertyWebkitBoxFlexGroup,
    CSSPropertyWebkitBoxLines,
    CSSPropertyWebkitBoxOrdinalGroup,
    CSSPropertyWebkitBoxOrient,
    CSSPropertyWebkitBoxPack,
    CSSPropertyWebkitBoxReflect,
    CSSPropertyWebkitBoxShadow,
    CSSPropertyWebkitBoxSizing,
    CSSPropertyWebkitColumnBreakAfter,
    CSSPropertyWebkitColumnBreakBefore,
    CSSPropertyWebkitColumnBreakInside,
    CSSPropertyWebkitColumnCount,
    CSSPropertyWebkitColumnGap,
    CSSPropertyWebkitColumnRuleColor,
    CSSPropertyWebkitColumnRuleStyle,
    CSSPropertyWebkitColumnRuleWidth,
    CSSPropertyWebkitColumnWidth,
    CSSPropertyWebkitHighlight,
    CSSPropertyWebkitLineBreak,
    CSSPropertyWebkitLineClamp,
    CSSPropertyWebkitMarginBottomCollapse,
    CSSPropertyWebkitMarginTopCollapse,
    CSSPropertyWebkitMarqueeDirection,
    CSSPropertyWebkitMarqueeIncrement,
    CSSPropertyWebkitMarqueeRepetition,
    CSSPropertyWebkitMarqueeStyle,
    CSSPropertyWebkitMaskAttachment,
    CSSPropertyWebkitMaskBoxImage,
    CSSPropertyWebkitMaskImage,
    CSSPropertyWebkitMaskPosition,
    CSSPropertyWebkitMaskRepeat,
    CSSPropertyWebkitMaskClip,
    CSSPropertyWebkitMaskComposite,
    CSSPropertyWebkitMaskOrigin,
    CSSPropertyWebkitMaskSize,
    CSSPropertyWebkitNbspMode,
    CSSPropertyWebkitPerspective,
    CSSPropertyWebkitPerspectiveOrigin,
    CSSPropertyWebkitRtlOrdering,
    CSSPropertyWebkitTextDecorationsInEffect,
    CSSPropertyWebkitTextFillColor,
    CSSPropertyWebkitTextSecurity,
    CSSPropertyWebkitTextStrokeColor,
    CSSPropertyWebkitTextStrokeWidth,
    CSSPropertyWebkitTransform,
    CSSPropertyWebkitTransformOrigin,
    CSSPropertyWebkitTransformStyle,
    CSSPropertyWebkitTransitionDelay,
    CSSPropertyWebkitTransitionDuration,
    CSSPropertyWebkitTransitionProperty,
    CSSPropertyWebkitTransitionTimingFunction,
    CSSPropertyWebkitUserDrag,
    CSSPropertyWebkitUserModify,
    CSSPropertyWebkitUserSelect,
#if ENABLE(DASHBOARD_SUPPORT)
    CSSPropertyWebkitDashboardRegion,
#endif
    CSSPropertyWebkitBorderBottomLeftRadius,
    CSSPropertyWebkitBorderBottomRightRadius,
    CSSPropertyWebkitBorderTopLeftRadius,
    CSSPropertyWebkitBorderTopRightRadius
    
#if ENABLE(SVG)
    ,
    CSSPropertyClipPath,
    CSSPropertyClipRule,
    CSSPropertyMask,
    CSSPropertyFilter,
    CSSPropertyFloodColor,
    CSSPropertyFloodOpacity,
    CSSPropertyLightingColor,
    CSSPropertyStopColor,
    CSSPropertyStopOpacity,
    CSSPropertyColorInterpolation,
    CSSPropertyColorInterpolationFilters,
    CSSPropertyColorRendering,
    CSSPropertyFill,
    CSSPropertyFillOpacity,
    CSSPropertyFillRule,
    CSSPropertyImageRendering,
    CSSPropertyMarkerEnd,
    CSSPropertyMarkerMid,
    CSSPropertyMarkerStart,
    CSSPropertyShapeRendering,
    CSSPropertyStroke,
    CSSPropertyStrokeDasharray,
    CSSPropertyStrokeDashoffset,
    CSSPropertyStrokeLinecap,
    CSSPropertyStrokeLinejoin,
    CSSPropertyStrokeMiterlimit,
    CSSPropertyStrokeOpacity,
    CSSPropertyStrokeWidth,
    CSSPropertyTextRendering,
    CSSPropertyAlignmentBaseline,
    CSSPropertyBaselineShift,
    CSSPropertyDominantBaseline,
    CSSPropertyKerning,
    CSSPropertyTextAnchor,
    CSSPropertyWritingMode,
    CSSPropertyGlyphOrientationHorizontal,
    CSSPropertyGlyphOrientationVertical
#endif
};

const unsigned numComputedProperties = sizeof(computedProperties) / sizeof(computedProperties[0]);

static PassRefPtr<CSSValue> valueForShadow(const ShadowData* shadow)
{
    if (!shadow)
        return CSSPrimitiveValue::createIdentifier(CSSValueNone);

    RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
    for (const ShadowData* s = shadow; s; s = s->next) {
        RefPtr<CSSPrimitiveValue> x = CSSPrimitiveValue::create(s->x, CSSPrimitiveValue::CSS_PX);
        RefPtr<CSSPrimitiveValue> y = CSSPrimitiveValue::create(s->y, CSSPrimitiveValue::CSS_PX);
        RefPtr<CSSPrimitiveValue> blur = CSSPrimitiveValue::create(s->blur, CSSPrimitiveValue::CSS_PX);
        RefPtr<CSSPrimitiveValue> color = CSSPrimitiveValue::createColor(s->color.rgb());
        list->prepend(ShadowValue::create(x.release(), y.release(), blur.release(), color.release()));
    }
    return list.release();
}

static int valueForRepeatRule(int rule)
{
    switch (rule) {
        case RepeatImageRule:
            return CSSValueRepeat;
        case RoundImageRule:
            return CSSValueRound;