1 /*

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

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

     4     Copyright (C) Research In Motion Limited 2010. 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 #ifndef SVGLocatable_h

    23 #define SVGLocatable_h

    24 

    25 #if ENABLE(SVG)

    26 #include "AffineTransform.h"

    27 #include "ExceptionCode.h"

    28 

    29 namespace WebCore {

    30 

    31 class FloatRect;

    32 class SVGElement;

    33 

    34 class SVGLocatable {

    35 public:

    36     SVGLocatable();

    37     virtual ~SVGLocatable();

    38 

    39     // 'SVGLocatable' functions

    40     virtual SVGElement* nearestViewportElement() const = 0;

    41     virtual SVGElement* farthestViewportElement() const = 0;

    42 

    43     virtual FloatRect getBBox() const = 0;

    44     virtual AffineTransform getCTM() const = 0;

    45     virtual AffineTransform getScreenCTM() const = 0;

    46     AffineTransform getTransformToElement(SVGElement*, ExceptionCode&) const;

    47 

    48     static SVGElement* nearestViewportElement(const SVGElement*);

    49     static SVGElement* farthestViewportElement(const SVGElement*);

    50 

    51     enum CTMScope {

    52         NearestViewportScope, // Used for getCTM()

    53         ScreenScope // Used for getScreenCTM()

    54     };

    55 

    56 protected:

    57     virtual AffineTransform localCoordinateSpaceTransform(SVGLocatable::CTMScope) const { return AffineTransform(); }

    58 

    59     static FloatRect getBBox(const SVGElement*);

    60     static AffineTransform computeCTM(const SVGElement*, CTMScope);

    61 };

    62 

    63 } // namespace WebCore

    64 

    65 #endif // ENABLE(SVG)

    66 #endif // SVGLocatable_h