layout/svg/nsSVGFilterFrame.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef __NS_SVGFILTERFRAME_H__
   7 #define __NS_SVGFILTERFRAME_H__
   8
   9 #include "mozilla/Attributes.h"
  10 #include "nsFrame.h"
  11 #include "nsQueryFrame.h"
  12 #include "nsSVGContainerFrame.h"
  13 #include "nsSVGUtils.h"
  14
  15 class nsIAtom;
  16 class nsIContent;
  17 class nsIFrame;
  18 class nsIPresShell;
  19 class nsStyleContext;
  20 class nsSVGIntegerPair;
  21 class nsSVGLength2;
  22
  23 struct nsRect;
  24
  25 namespace mozilla {
  26 namespace dom {
  27 class SVGFilterElement;
  28 }
  29 }
  30
  31 typedef nsSVGContainerFrame nsSVGFilterFrameBase;
  32
  33 class nsSVGFilterFrame : public nsSVGFilterFrameBase
  34 {
  35   friend nsIFrame*
  36   NS_NewSVGFilterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  37 protected:
  38   explicit nsSVGFilterFrame(nsStyleContext* aContext)
  39     : nsSVGFilterFrameBase(aContext),
  40       mLoopFlag(false),
  41       mNoHRefURI(false)
  42   {
  43     AddStateBits(NS_FRAME_IS_NONDISPLAY);
  44   }
  45
  46 public:
  47   NS_DECL_FRAMEARENA_HELPERS
  48
  49   // nsIFrame methods:
  50   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
  51                                 const nsRect&           aDirtyRect,
  52                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE {}
  53
  54   virtual nsresult AttributeChanged(int32_t         aNameSpaceID,
  55                                     nsIAtom*        aAttribute,
  56                                     int32_t         aModType) MOZ_OVERRIDE;
  57
  58 #ifdef DEBUG
  59   virtual void Init(nsIContent*       aContent,
  60                     nsContainerFrame* aParent,
  61                     nsIFrame*         aPrevInFlow) MOZ_OVERRIDE;
  62 #endif
  63
  64   /**
  65    * Get the "type" of the frame
  66    *
  67    * @see nsGkAtoms::svgFilterFrame
  68    */
  69   virtual nsIAtom* GetType() const MOZ_OVERRIDE;
  70
  71 private:
  72   // Parse our xlink:href and set up our nsSVGPaintingProperty if we
  73   // reference another filter and we don't have a property. Return
  74   // the referenced filter's frame if available, null otherwise.
  75   class AutoFilterReferencer;
  76   friend class nsSVGFilterInstance;
  77   nsSVGFilterFrame* GetReferencedFilter();
  78   nsSVGFilterFrame* GetReferencedFilterIfNotInUse();
  79
  80   // Accessors to lookup filter attributes
  81   uint16_t GetEnumValue(uint32_t aIndex, nsIContent *aDefault);
  82   uint16_t GetEnumValue(uint32_t aIndex)
  83   {
  84     return GetEnumValue(aIndex, mContent);
  85   }
  86   const nsSVGLength2 *GetLengthValue(uint32_t aIndex, nsIContent *aDefault);
  87   const nsSVGLength2 *GetLengthValue(uint32_t aIndex)
  88   {
  89     return GetLengthValue(aIndex, mContent);
  90   }
  91   const mozilla::dom::SVGFilterElement *GetFilterContent(nsIContent *aDefault);
  92   const mozilla::dom::SVGFilterElement *GetFilterContent()
  93   {
  94     return GetFilterContent(mContent);
  95   }
  96
  97   // This flag is used to detect loops in xlink:href processing
  98   bool                              mLoopFlag;
  99   bool                              mNoHRefURI;
 100 };
 101
 102 #endif