/*

    Copyright (C) 2008 Eric Seidel <eric@webkit.org>

    Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>

                  2004, 2005, 2007 Rob Buis <buis@kde.org>

    Copyright (C) 2005, 2006 Apple Computer, Inc.

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Library 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

    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License

    along with this library; see the file COPYING.LIB.  If not, write to

    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    Boston, MA 02110-1301, USA.

*/

#include "config.h"

#if ENABLE(SVG)

#include "CSSInheritedValue.h"

#include "CSSInitialValue.h"

#include "CSSParser.h"

#include "CSSProperty.h"

#include "CSSPropertyNames.h"

#include "CSSQuirkPrimitiveValue.h"

#include "CSSValueKeywords.h"

#include "CSSValueList.h"

#include "SVGPaint.h"

using namespace std;

namespace WebCore {

bool CSSParser::parseSVGValue(int propId, bool important)

{

    CSSParserValue* value = m_valueList->current();

    if (!value)

        return false;

    int id = value->id;

    bool valid_primitive = false;

    RefPtr<CSSValue> parsedValue;

    switch (propId) {

    /* The comment to the right defines all valid value of these

     * properties as defined in SVG 1.1, Appendix N. Property index */

    case CSSPropertyAlignmentBaseline:

    // auto | baseline | before-edge | text-before-edge | middle |

    // central | after-edge | text-after-edge | ideographic | alphabetic |

    // hanging | mathematical | inherit

        if (id == CSSValueAuto || id == CSSValueBaseline || id == CSSValueMiddle ||

          (id >= CSSValueBeforeEdge && id <= CSSValueMathematical))

            valid_primitive = true;

        break;

    case CSSPropertyBaselineShift:

    // baseline | super | sub | <percentage> | <length> | inherit

        if (id == CSSValueBaseline || id == CSSValueSub ||

           id >= CSSValueSuper)

            valid_primitive = true;

        else

            valid_primitive = validUnit(value, FLength|FPercent, false);

        break;

    case CSSPropertyDominantBaseline:

    // auto | use-script | no-change | reset-size | ideographic |

    // alphabetic | hanging | mathematical | central | middle |

    // text-after-edge | text-before-edge | inherit

        if (id == CSSValueAuto || id == CSSValueMiddle ||

          (id >= CSSValueUseScript && id <= CSSValueResetSize) ||

          (id >= CSSValueCentral && id <= CSSValueMathematical))

            valid_primitive = true;

        break;

    case CSSPropertyEnableBackground:

    // accumulate | new [x] [y] [width] [height] | inherit

        if (id == CSSValueAccumulate) // TODO : new

            valid_primitive = true;

        break;

    case CSSPropertyMarkerStart:

    case CSSPropertyMarkerMid:

    case CSSPropertyMarkerEnd:

    case CSSPropertyMask:

        if (id == CSSValueNone)

            valid_primitive = true;

        else if (value->unit == CSSPrimitiveValue::CSS_URI) {

            parsedValue = CSSPrimitiveValue::create(value->string, CSSPrimitiveValue::CSS_URI);

            if (parsedValue)

                m_valueList->next();

        }

        break;

    case CSSPropertyClipRule:            // nonzero | evenodd | inherit

    case CSSPropertyFillRule:

        if (id == CSSValueNonzero || id == CSSValueEvenodd)

            valid_primitive = true;

        break;

    case CSSPropertyStrokeMiterlimit:   // <miterlimit> | inherit

        valid_primitive = validUnit(value, FNumber|FNonNeg, false);

        break;

    case CSSPropertyStrokeLinejoin:   // miter | round | bevel | inherit

        if (id == CSSValueMiter || id == CSSValueRound || id == CSSValueBevel)

            valid_primitive = true;

        break;

    case CSSPropertyStrokeLinecap:    // butt | round | square | inherit

        if (id == CSSValueButt || id == CSSValueRound || id == CSSValueSquare)

            valid_primitive = true;

        break;

    case CSSPropertyStrokeOpacity:   // <opacity-value> | inherit

    case CSSPropertyFillOpacity:

    case CSSPropertyStopOpacity:

    case CSSPropertyFloodOpacity:

        valid_primitive = (!id && validUnit(value, FNumber|FPercent, false));

        break;

    case CSSPropertyShapeRendering:

    // auto | optimizeSpeed | crispEdges | geometricPrecision | inherit

        if (id == CSSValueAuto || id == CSSValueOptimizespeed ||

            id == CSSValueCrispedges || id == CSSValueGeometricprecision)

            valid_primitive = true;

        break;

    case CSSPropertyImageRendering:  // auto | optimizeSpeed |

    case CSSPropertyColorRendering:  // optimizeQuality | inherit

        if (id == CSSValueAuto || id == CSSValueOptimizespeed ||

            id == CSSValueOptimizequality)

            valid_primitive = true;

        break;

    case CSSPropertyColorProfile: // auto | sRGB | <name> | <uri> inherit

        if (id == CSSValueAuto || id == CSSValueSrgb)

            valid_primitive = true;

        break;

    case CSSPropertyColorInterpolation:   // auto | sRGB | linearRGB | inherit

    case CSSPropertyColorInterpolationFilters:  

        if (id == CSSValueAuto || id == CSSValueSrgb || id == CSSValueLinearrgb)

            valid_primitive = true;

        break;

    /* Start of supported CSS properties with validation. This is needed for parseShortHand to work

     * correctly and allows optimization in applyRule(..)

     */

    case CSSPropertyTextAnchor:    // start | middle | end | inherit

        if (id == CSSValueStart || id == CSSValueMiddle || id == CSSValueEnd)

            valid_primitive = true;

        break;

    case CSSPropertyGlyphOrientationVertical: // auto | <angle> | inherit

        if (id == CSSValueAuto) {

            valid_primitive = true;

            break;

        }

    /* fallthrough intentional */

    case CSSPropertyGlyphOrientationHorizontal: // <angle> (restricted to _deg_ per SVG 1.1 spec) | inherit

        if (value->unit == CSSPrimitiveValue::CSS_DEG || value->unit == CSSPrimitiveValue::CSS_NUMBER) {

            parsedValue = CSSPrimitiveValue::create(value->fValue, CSSPrimitiveValue::CSS_DEG);

            if (parsedValue)

                m_valueList->next();

        }

        break;

    case CSSPropertyFill:                 // <paint> | inherit

    case CSSPropertyStroke:               // <paint> | inherit

        {

            if (id == CSSValueNone)

                parsedValue = SVGPaint::create(SVGPaint::SVG_PAINTTYPE_NONE);

            else if (id == CSSValueCurrentcolor)

                parsedValue = SVGPaint::create(SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR);

            else if (value->unit == CSSPrimitiveValue::CSS_URI) {

                RGBA32 c = Color::transparent;

                if (m_valueList->next() && parseColorFromValue(m_valueList->current(), c, true)) {

                    parsedValue = SVGPaint::create(value->string, c);

                } else

                    parsedValue = SVGPaint::create(SVGPaint::SVG_PAINTTYPE_URI, value->string);

            } else

                parsedValue = parseSVGPaint();

            if (parsedValue)

                m_valueList->next();

        }

        break;

    case CSSPropertyColor:                // <color> | inherit

        if ((id >= CSSValueAqua && id <= CSSValueWindowtext) ||

           (id >= CSSValueAliceblue && id <= CSSValueYellowgreen))

            parsedValue = SVGColor::create(value->string);

        else

            parsedValue = parseSVGColor();

        if (parsedValue)

            m_valueList->next();

        break;

    case CSSPropertyStopColor: // TODO : icccolor

    case CSSPropertyFloodColor:

    case CSSPropertyLightingColor:

        if ((id >= CSSValueAqua && id <= CSSValueWindowtext) ||

           (id >= CSSValueAliceblue && id <= CSSValueYellowgreen))

            parsedValue = SVGColor::create(value->string);

        else if (id == CSSValueCurrentcolor)

            parsedValue = SVGColor::createCurrentColor();

        else // TODO : svgcolor (iccColor)

            parsedValue = parseSVGColor();

        if (parsedValue)

            m_valueList->next();

        break;

    case CSSPropertyWritingMode:

    // lr-tb | rl_tb | tb-rl | lr | rl | tb | inherit

        if (id >= CSSValueLrTb && id <= CSSValueTb)

            valid_primitive = true;

        break;

    case CSSPropertyStrokeWidth:         // <length> | inherit

    case CSSPropertyStrokeDashoffset:

        valid_primitive = validUnit(value, FLength | FPercent, false);

        break;

    case CSSPropertyStrokeDasharray:     // none | <dasharray> | inherit

        if (id == CSSValueNone)

            valid_primitive = true;

        else

            parsedValue = parseSVGStrokeDasharray();

        break;

    case CSSPropertyKerning:              // auto | normal | <length> | inherit

        if (id == CSSValueAuto || id == CSSValueNormal)

            valid_primitive = true;

        else

            valid_primitive = validUnit(value, FLength, false);

        break;

    case CSSPropertyClipPath:    // <uri> | none | inherit

    case CSSPropertyFilter:

        if (id == CSSValueNone)

            valid_primitive = true;

        else if (value->unit == CSSPrimitiveValue::CSS_URI) {

            parsedValue = CSSPrimitiveValue::create(value->string, (CSSPrimitiveValue::UnitTypes) value->unit);

            if (parsedValue)

                m_valueList->next();

        }

        break;

    case CSSPropertyWebkitShadow:

        if (id == CSSValueNone)

            valid_primitive = true;

        else

            return parseShadow(propId, important);

    /* shorthand properties */

    case CSSPropertyMarker:

    {

        ShorthandScope scope(this, propId);

        m_implicitShorthand = true;

        if (!parseValue(CSSPropertyMarkerStart, important))

            return false;

        if (m_valueList->current()) {

            rollbackLastProperties(1);

            return false;

        }

        CSSValue* value = m_parsedProperties[m_numParsedProperties - 1]->value();

        addProperty(CSSPropertyMarkerMid, value, important);

        addProperty(CSSPropertyMarkerEnd, value, important);

        m_implicitShorthand = false;

        return true;

    }

    default:

        // If you crash here, it's because you added a css property and are not handling it

        // in either this switch statement or the one in CSSParser::parseValue

        ASSERT_WITH_MESSAGE(0, "unimplemented propertyID: %d", propId);

        return false;

    }

    if (valid_primitive) {

        if (id != 0)

            parsedValue = CSSPrimitiveValue::createIdentifier(id);

        else if (value->unit == CSSPrimitiveValue::CSS_STRING)

            parsedValue = CSSPrimitiveValue::create(value->string, (CSSPrimitiveValue::UnitTypes) value->unit);

        else if (value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)

            parsedValue = CSSPrimitiveValue::create(value->fValue, (CSSPrimitiveValue::UnitTypes) value->unit);

        else if (value->unit >= CSSParserValue::Q_EMS)

            parsedValue = CSSQuirkPrimitiveValue::create(value->fValue, CSSPrimitiveValue::CSS_EMS);

        m_valueList->next();

    }

    if (!parsedValue || (m_valueList->current() && !inShorthand()))

        return false;

    addProperty(propId, parsedValue.release(), important);

    return true;

}

PassRefPtr<CSSValue> CSSParser::parseSVGStrokeDasharray()

{

    RefPtr<CSSValueList> ret = CSSValueList::createCommaSeparated();

    CSSParserValue* value = m_valueList->current();

    bool valid_primitive = true;

    while (value) {

        valid_primitive = validUnit(value, FLength | FPercent |FNonNeg, false);

        if (!valid_primitive)

            break;

        if (value->id != 0)

            ret->append(CSSPrimitiveValue::createIdentifier(value->id));

        else if (value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)

            ret->append(CSSPrimitiveValue::create(value->fValue, (CSSPrimitiveValue::UnitTypes) value->unit));

        value = m_valueList->next();

        if (value && value->unit == CSSParserValue::Operator && value->iValue == ',')

            value = m_valueList->next();

    }

    if (!valid_primitive)

        return 0;

    return ret.release();

}

PassRefPtr<CSSValue> CSSParser::parseSVGPaint()

{

    RGBA32 c = Color::transparent;

    if (!parseColorFromValue(m_valueList->current(), c, true))

        return SVGPaint::create();

    return SVGPaint::create(Color(c));

}

PassRefPtr<CSSValue> CSSParser::parseSVGColor()

{

    RGBA32 c = Color::transparent;

    if (!parseColorFromValue(m_valueList->current(), c, true))

        return 0;

    return SVGColor::create(Color(c));

}

}

#endif // ENABLE(SVG)

// vim:ts=4:noet