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      1 /*
      2  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis (at) kde.org>
      4  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  */
     21 
     22 #include "config.h"
     23 
     24 #if ENABLE(SVG)
     25 #include "SVGPaint.h"
     26 
     27 #include "SVGException.h"
     28 #include "SVGURIReference.h"
     29 #include <wtf/text/StringConcatenate.h>
     30 
     31 namespace WebCore {
     32 
     33 static inline SVGColor::SVGColorType colorTypeForPaintType(const SVGPaint::SVGPaintType& paintType)
     34 {
     35     switch (paintType) {
     36     case SVGPaint::SVG_PAINTTYPE_NONE:
     37     case SVGPaint::SVG_PAINTTYPE_UNKNOWN:
     38     case SVGPaint::SVG_PAINTTYPE_URI:
     39     case SVGPaint::SVG_PAINTTYPE_URI_NONE:
     40         return SVGColor::SVG_COLORTYPE_UNKNOWN;
     41     case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR:
     42     case SVGPaint::SVG_PAINTTYPE_RGBCOLOR:
     43         return SVGColor::SVG_COLORTYPE_RGBCOLOR;
     44     case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR:
     45     case SVGPaint::SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR:
     46         return SVGColor::SVG_COLORTYPE_RGBCOLOR_ICCCOLOR;
     47     case SVGPaint::SVG_PAINTTYPE_URI_CURRENTCOLOR:
     48     case SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR:
     49         return SVGColor::SVG_COLORTYPE_CURRENTCOLOR;
     50     }
     51 
     52     ASSERT_NOT_REACHED();
     53     return SVGColor::SVG_COLORTYPE_UNKNOWN;
     54 }
     55 
     56 SVGPaint::SVGPaint(const SVGPaintType& paintType, String uri)
     57     : SVGColor(colorTypeForPaintType(paintType))
     58     , m_paintType(paintType)
     59     , m_uri(uri)
     60 {
     61 }
     62 
     63 void SVGPaint::setUri(const String& uri)
     64 {
     65     // Spec: Sets the paintType to SVG_PAINTTYPE_URI_NONE and sets uri to the specified value.
     66     m_uri = uri;
     67     m_paintType = SVG_PAINTTYPE_URI_NONE;
     68     setColor(Color());
     69     setColorType(colorTypeForPaintType(m_paintType));
     70     // FIXME: A follow up patch will call valueChanged() here.
     71 }
     72 
     73 SVGPaint* SVGPaint::defaultFill()
     74 {
     75     static SVGPaint* staticDefaultFill = createColor(Color::black).releaseRef();
     76     return staticDefaultFill;
     77 }
     78 
     79 SVGPaint* SVGPaint::defaultStroke()
     80 {
     81     static SVGPaint* staticDefaultStroke = createNone().releaseRef();
     82     return staticDefaultStroke;
     83 }
     84 
     85 void SVGPaint::setPaint(unsigned short paintType, const String& uri, const String& rgbColor, const String& iccColor, ExceptionCode& ec)
     86 {
     87     if ((paintType > SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR && paintType < SVG_PAINTTYPE_NONE) || paintType > SVG_PAINTTYPE_URI) {
     88         ec = SVGException::SVG_WRONG_TYPE_ERR;
     89         return;
     90     }
     91 
     92     bool requiresURI = false;
     93 
     94     SVGPaintType type = static_cast<SVGPaintType>(paintType);
     95     switch (type) {
     96     case SVG_PAINTTYPE_UNKNOWN:
     97         // Spec: It is invalid to attempt to define a new value of this type or to attempt to switch an existing value to this type.
     98         ec = SVGException::SVG_INVALID_VALUE_ERR;
     99         return;
    100     case SVG_PAINTTYPE_RGBCOLOR:
    101     case SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR:
    102     case SVG_PAINTTYPE_NONE:
    103     case SVG_PAINTTYPE_CURRENTCOLOR:
    104         break;
    105     case SVG_PAINTTYPE_URI_NONE:
    106     case SVG_PAINTTYPE_URI_CURRENTCOLOR:
    107     case SVG_PAINTTYPE_URI_RGBCOLOR:
    108     case SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR:
    109     case SVG_PAINTTYPE_URI:
    110         requiresURI = true;
    111         break;
    112     };
    113 
    114     // Spec: If paintType requires a URI, then uri must be non-null; otherwise, uri must be null.
    115     if (requiresURI && uri.isEmpty()) {
    116         ec = SVGException::SVG_INVALID_VALUE_ERR;
    117         return;
    118     }
    119 
    120     SVGColor::SVGColorType colorType = colorTypeForPaintType(type);
    121     if (colorType == SVGColor::SVG_COLORTYPE_UNKNOWN) {
    122         // The standard setColor() code path used in the else branch
    123         // raises an exception when attempting to switch to an unknown color type.
    124         // Here we explicitely want to reset to Color() and an unknown type, so force it.
    125         setColorType(colorType);
    126         setColor(Color());
    127     } else {
    128         setColor(colorType, rgbColor, iccColor, ec);
    129         if (ec)
    130             return;
    131     }
    132 
    133     m_paintType = type;
    134     m_uri = requiresURI ? uri : String();
    135     // FIXME: A follow up patch will call valueChanged() here.
    136 }
    137 
    138 String SVGPaint::cssText() const
    139 {
    140     switch (m_paintType) {
    141     case SVG_PAINTTYPE_UNKNOWN:
    142     case SVG_PAINTTYPE_RGBCOLOR:
    143     case SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR:
    144     case SVG_PAINTTYPE_CURRENTCOLOR:
    145         return SVGColor::cssText();
    146     case SVG_PAINTTYPE_NONE:
    147         return "none";
    148     case SVG_PAINTTYPE_URI_NONE:
    149         return makeString(m_uri, " none");
    150     case SVG_PAINTTYPE_URI_CURRENTCOLOR:
    151     case SVG_PAINTTYPE_URI_RGBCOLOR:
    152     case SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR: {
    153         String color = SVGColor::cssText();
    154         if (color.isEmpty())
    155             return m_uri;
    156         return makeString(m_uri, ' ', color);
    157     }
    158     case SVG_PAINTTYPE_URI:
    159         return m_uri;
    160     };
    161 
    162     ASSERT_NOT_REACHED();
    163     return String();
    164 }
    165 
    166 bool SVGPaint::matchesTargetURI(const String& referenceId)
    167 {
    168     switch (m_paintType) {
    169     case SVG_PAINTTYPE_UNKNOWN:
    170     case SVG_PAINTTYPE_RGBCOLOR:
    171     case SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR:
    172     case SVG_PAINTTYPE_CURRENTCOLOR:
    173     case SVG_PAINTTYPE_NONE:
    174         return false;
    175     case SVG_PAINTTYPE_URI_NONE:
    176     case SVG_PAINTTYPE_URI_CURRENTCOLOR:
    177     case SVG_PAINTTYPE_URI_RGBCOLOR:
    178     case SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR:
    179     case SVG_PAINTTYPE_URI:
    180         return referenceId == SVGURIReference::getTarget(m_uri);
    181     }
    182 
    183     ASSERT_NOT_REACHED();
    184     return false;
    185 }
    186 
    187 }
    188 
    189 #endif // ENABLE(SVG)
    190