1 /*

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

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

     4                   2009 Google, Inc.

     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 "RenderSVGTransformableContainer.h"

    26 

    27 #include "SVGShadowTreeElements.h"

    28 #include "SVGStyledTransformableElement.h"

    29 

    30 namespace WebCore {

    31     

    32 RenderSVGTransformableContainer::RenderSVGTransformableContainer(SVGStyledTransformableElement* node)

    33     : RenderSVGContainer(node)

    34     , m_needsTransformUpdate(true)

    35 {

    36 }

    37 

    38 void RenderSVGTransformableContainer::calculateLocalTransform()

    39 {

    40     SVGStyledTransformableElement* element = static_cast<SVGStyledTransformableElement*>(node());

    41 

    42     bool needsUpdate = m_needsTransformUpdate;

    43     if (needsUpdate) {

    44         m_localTransform = element->animatedLocalTransform();

    45         m_needsTransformUpdate = false;

    46     }

    47 

    48     if (!element->hasTagName(SVGNames::gTag) || !static_cast<SVGGElement*>(element)->isShadowTreeContainerElement())

    49         return;

    50 

    51     FloatSize translation = static_cast<SVGShadowTreeContainerElement*>(element)->containerTranslation();

    52     if (translation.width() == 0 && translation.height() == 0)

    53         return;

    54 

    55     // FIXME: Could optimize this case for use to avoid refetching the animatedLocalTransform() here, if only the containerTranslation() changed.

    56     if (!needsUpdate)

    57         m_localTransform = element->animatedLocalTransform();

    58 

    59     m_localTransform.translate(translation.width(), translation.height());

    60 }

    61 

    62 }

    63 

    64 #endif // ENABLE(SVG)