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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  *
      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 #include "config.h"
     22 #include "core/svg/SVGDocument.h"
     23 
     24 #include "SVGNames.h"
     25 #include "bindings/v8/ExceptionStatePlaceholder.h"
     26 #include "core/dom/EventNames.h"
     27 #include "core/dom/NodeRenderingContext.h"
     28 #include "core/page/FrameView.h"
     29 #include "core/rendering/RenderView.h"
     30 #include "core/svg/SVGElement.h"
     31 #include "core/svg/SVGSVGElement.h"
     32 #include "core/svg/SVGViewSpec.h"
     33 #include "core/svg/SVGZoomAndPan.h"
     34 #include "core/svg/SVGZoomEvent.h"
     35 
     36 namespace WebCore {
     37 
     38 SVGDocument::SVGDocument(const DocumentInit& initializer)
     39     : Document(initializer, SVGDocumentClass)
     40 {
     41     ScriptWrappable::init(this);
     42 }
     43 
     44 SVGSVGElement* SVGDocument::rootElement() const
     45 {
     46     Element* elem = documentElement();
     47     if (elem && elem->hasTagName(SVGNames::svgTag))
     48         return toSVGSVGElement(elem);
     49 
     50     return 0;
     51 }
     52 
     53 void SVGDocument::dispatchZoomEvent(float prevScale, float newScale)
     54 {
     55     RefPtr<SVGZoomEvent> event = static_pointer_cast<SVGZoomEvent>(createEvent("SVGZoomEvents", IGNORE_EXCEPTION));
     56     event->initEvent(eventNames().zoomEvent, true, false);
     57     event->setPreviousScale(prevScale);
     58     event->setNewScale(newScale);
     59     rootElement()->dispatchEvent(event.release(), IGNORE_EXCEPTION);
     60 }
     61 
     62 void SVGDocument::dispatchScrollEvent()
     63 {
     64     RefPtr<Event> event = createEvent("SVGEvents", IGNORE_EXCEPTION);
     65     event->initEvent(eventNames().scrollEvent, true, false);
     66     rootElement()->dispatchEvent(event.release(), IGNORE_EXCEPTION);
     67 }
     68 
     69 bool SVGDocument::zoomAndPanEnabled() const
     70 {
     71     if (rootElement()) {
     72         if (rootElement()->useCurrentView()) {
     73             if (rootElement()->currentView())
     74                 return rootElement()->currentView()->zoomAndPan() == SVGZoomAndPanMagnify;
     75         } else
     76             return rootElement()->zoomAndPan() == SVGZoomAndPanMagnify;
     77     }
     78 
     79     return false;
     80 }
     81 
     82 void SVGDocument::startPan(const FloatPoint& start)
     83 {
     84     if (rootElement())
     85         m_translate = FloatPoint(start.x() - rootElement()->currentTranslate().x(), start.y() - rootElement()->currentTranslate().y());
     86 }
     87 
     88 void SVGDocument::updatePan(const FloatPoint& pos) const
     89 {
     90     if (rootElement()) {
     91         rootElement()->setCurrentTranslate(FloatPoint(pos.x() - m_translate.x(), pos.y() - m_translate.y()));
     92         if (renderer())
     93             renderer()->repaint();
     94     }
     95 }
     96 
     97 bool SVGDocument::childShouldCreateRenderer(const NodeRenderingContext& childContext) const
     98 {
     99     if (childContext.node()->hasTagName(SVGNames::svgTag))
    100         return toSVGSVGElement(childContext.node())->isValid();
    101     return true;
    102 }
    103 
    104 }
    105