1 /*

     2     Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>

     3                   2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>

     4 

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

     6     modify it under the terms of the GNU Library General Public

     7     License as published by the Free Software Foundation; either

     8     version 2 of the License, or (at your option) any later version.

     9 

    10     This library is distributed in the hope that it will be useful,

    11     but WITHOUT ANY WARRANTY; without even the implied warranty of

    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13     Library General Public License for more details.

    14 

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

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

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

    18     Boston, MA 02110-1301, USA.

    19 */

    20 

    21 #ifndef SVGPreserveAspectRatio_h

    22 #define SVGPreserveAspectRatio_h

    23 

    24 #if ENABLE(SVG)

    25 #include "FloatRect.h"

    26 #include "PlatformString.h"

    27 #include "SVGNames.h"

    28 

    29 namespace WebCore {

    30 

    31     class String;

    32     class AffineTransform;

    33 

    34     class SVGPreserveAspectRatio {

    35     public:

    36         enum SVGPreserveAspectRatioType {

    37             SVG_PRESERVEASPECTRATIO_UNKNOWN     = 0,

    38             SVG_PRESERVEASPECTRATIO_NONE        = 1,

    39             SVG_PRESERVEASPECTRATIO_XMINYMIN    = 2,

    40             SVG_PRESERVEASPECTRATIO_XMIDYMIN    = 3,

    41             SVG_PRESERVEASPECTRATIO_XMAXYMIN    = 4,

    42             SVG_PRESERVEASPECTRATIO_XMINYMID    = 5,

    43             SVG_PRESERVEASPECTRATIO_XMIDYMID    = 6,

    44             SVG_PRESERVEASPECTRATIO_XMAXYMID    = 7,

    45             SVG_PRESERVEASPECTRATIO_XMINYMAX    = 8,

    46             SVG_PRESERVEASPECTRATIO_XMIDYMAX    = 9,

    47             SVG_PRESERVEASPECTRATIO_XMAXYMAX    = 10

    48         };

    49 

    50         enum SVGMeetOrSliceType {

    51             SVG_MEETORSLICE_UNKNOWN    = 0,

    52             SVG_MEETORSLICE_MEET       = 1,

    53             SVG_MEETORSLICE_SLICE      = 2

    54         };

    55 

    56         SVGPreserveAspectRatio();

    57         virtual ~SVGPreserveAspectRatio();

    58 

    59         void setAlign(unsigned short);

    60         unsigned short align() const;

    61 

    62         void setMeetOrSlice(unsigned short);

    63         unsigned short meetOrSlice() const;

    64 

    65         void transformRect(FloatRect& destRect, FloatRect& srcRect);

    66         

    67         AffineTransform getCTM(double logicX, double logicY,

    68                                double logicWidth, double logicHeight,

    69                                double physX, double physY,

    70                                double physWidth, double physHeight) const;

    71 

    72         template<class Consumer>

    73         static bool parsePreserveAspectRatio(Consumer* consumer, const String& value, bool validate = true)

    74         {

    75             bool result = false;

    76             const UChar* begin = value.characters();

    77             const UChar* end = begin + value.length();

    78             consumer->setPreserveAspectRatioBaseValue(parsePreserveAspectRatio(begin, end, validate, result));

    79             return result;

    80         }

    81 

    82         // It's recommended to use the method above, only SVGViewSpec needs this parsing method

    83         static SVGPreserveAspectRatio parsePreserveAspectRatio(const UChar*& currParam, const UChar* end, bool validate, bool& result);

    84 

    85         String valueAsString() const;

    86 

    87     private:

    88         unsigned short m_align;

    89         unsigned short m_meetOrSlice;

    90     };

    91 

    92 } // namespace WebCore

    93 

    94 #endif // ENABLE(SVG)

    95 #endif // SVGPreserveAspectRatio_h