third_party/WebKit/Source/core/svg/SVGDocumentExtensions.h

   1 /*
   2  * Copyright (C) 2006 Apple Inc. All rights reserved.
   3  * Copyright (C) 2006, 2008 Nikolas Zimmermann <zimmermann@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 SVGDocumentExtensions_h
  22 #define SVGDocumentExtensions_h
  23
  24 #include "core/layout/svg/SVGResourcesCache.h"
  25 #include "platform/geometry/FloatPoint.h"
  26 #include "platform/heap/Handle.h"
  27 #include "wtf/Forward.h"
  28 #include "wtf/HashMap.h"
  29 #include "wtf/HashSet.h"
  30 #include "wtf/text/AtomicStringHash.h"
  31
  32 namespace blink {
  33
  34 class Document;
  35 class LayoutSVGResourceContainer;
  36 class SubtreeLayoutScope;
  37 class SVGSVGElement;
  38 class Element;
  39
  40 class SVGDocumentExtensions : public NoBaseWillBeGarbageCollectedFinalized<SVGDocumentExtensions> {
  41     WTF_MAKE_NONCOPYABLE(SVGDocumentExtensions); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(SVGDocumentExtensions);
  42 public:
  43     typedef WillBeHeapHashSet<RawPtrWillBeMember<Element>> SVGPendingElements;
  44     explicit SVGDocumentExtensions(Document*);
  45     ~SVGDocumentExtensions();
  46
  47     void addTimeContainer(SVGSVGElement*);
  48     void removeTimeContainer(SVGSVGElement*);
  49
  50     void addResource(const AtomicString& id, LayoutSVGResourceContainer*);
  51     void removeResource(const AtomicString& id);
  52     LayoutSVGResourceContainer* resourceById(const AtomicString& id) const;
  53
  54     static void serviceOnAnimationFrame(Document&, double monotonicAnimationStartTime);
  55
  56     void startAnimations();
  57     void pauseAnimations();
  58     void dispatchSVGLoadEventToOutermostSVGElements();
  59
  60     void reportWarning(const String&);
  61     void reportError(const String&);
  62
  63     SVGResourcesCache& resourcesCache() { return m_resourcesCache; }
  64
  65     void addSVGRootWithRelativeLengthDescendents(SVGSVGElement*);
  66     void removeSVGRootWithRelativeLengthDescendents(SVGSVGElement*);
  67     bool isSVGRootWithRelativeLengthDescendents(SVGSVGElement*) const;
  68     void invalidateSVGRootsWithRelativeLengthDescendents(SubtreeLayoutScope*);
  69
  70     bool zoomAndPanEnabled() const;
  71
  72     void startPan(const FloatPoint& start);
  73     void updatePan(const FloatPoint& pos) const;
  74
  75     static SVGSVGElement* rootElement(const Document&);
  76     SVGSVGElement* rootElement() const;
  77
  78     DECLARE_TRACE();
  79
  80 private:
  81     RawPtrWillBeMember<Document> m_document;
  82     WillBeHeapHashSet<RawPtrWillBeMember<SVGSVGElement>> m_timeContainers; // For SVG 1.2 support this will need to be made more general.
  83     HashMap<AtomicString, LayoutSVGResourceContainer*> m_resources;
  84     WillBeHeapHashMap<AtomicString, OwnPtrWillBeMember<SVGPendingElements>> m_pendingResources; // Resources that are pending.
  85     WillBeHeapHashMap<AtomicString, OwnPtrWillBeMember<SVGPendingElements>> m_pendingResourcesForRemoval; // Resources that are pending and scheduled for removal.
  86     SVGResourcesCache m_resourcesCache;
  87     WillBeHeapHashSet<RawPtrWillBeMember<SVGSVGElement>> m_relativeLengthSVGRoots; // Root SVG elements with relative length descendants.
  88     FloatPoint m_translate;
  89 #if ENABLE(ASSERT)
  90     bool m_inRelativeLengthSVGRootsInvalidation;
  91 #endif
  92
  93 public:
  94     // This HashMap contains a list of pending resources. Pending resources, are such
  95     // which are referenced by any object in the SVG document, but do NOT exist yet.
  96     // For instance, dynamically build gradients / patterns / clippers...
  97     void addPendingResource(const AtomicString& id, Element*);
  98     bool hasPendingResource(const AtomicString& id) const;
  99     bool isElementPendingResources(Element*) const;
 100     bool isElementPendingResource(Element*, const AtomicString& id) const;
 101     void clearHasPendingResourcesIfPossible(Element*);
 102     void removeElementFromPendingResources(Element*);
 103     PassOwnPtrWillBeRawPtr<SVGPendingElements> removePendingResource(const AtomicString& id);
 104
 105     void serviceAnimations(double monotonicAnimationStartTime);
 106
 107     // The following two functions are used for scheduling a pending resource to be removed.
 108     void markPendingResourcesForRemoval(const AtomicString&);
 109     Element* removeElementFromPendingResourcesForRemoval(const AtomicString&);
 110
 111 private:
 112     PassOwnPtrWillBeRawPtr<SVGPendingElements> removePendingResourceForRemoval(const AtomicString&);
 113 };
 114
 115 }
 116
 117 #endif