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 nsRenderingContext;
  20 class nsStyleContext;
  21 class nsSVGIntegerPair;
  22 class nsSVGLength2;
  23
  24 struct nsRect;
  25
  26 namespace mozilla {
  27 namespace dom {
  28 class SVGFilterElement;
  29 }
  30 }
  31
  32 typedef nsSVGContainerFrame nsSVGFilterFrameBase;
  33
  34 class nsSVGFilterFrame : public nsSVGFilterFrameBase
  35 {
  36   friend nsIFrame*
  37   NS_NewSVGFilterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  38 protected:
  39   explicit nsSVGFilterFrame(nsStyleContext* aContext)
  40     : nsSVGFilterFrameBase(aContext),
  41       mLoopFlag(false),
  42       mNoHRefURI(false)
  43   {
  44     AddStateBits(NS_FRAME_IS_NONDISPLAY);
  45   }
  46
  47 public:
  48   NS_DECL_FRAMEARENA_HELPERS
  49
  50   // nsIFrame methods:
  51   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
  52                                 const nsRect&           aDirtyRect,
  53                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE {}
  54
  55   virtual nsresult AttributeChanged(int32_t         aNameSpaceID,
  56                                     nsIAtom*        aAttribute,
  57                                     int32_t         aModType) MOZ_OVERRIDE;
  58
  59 #ifdef DEBUG
  60   virtual void Init(nsIContent*       aContent,
  61                     nsContainerFrame* aParent,
  62                     nsIFrame*         aPrevInFlow) MOZ_OVERRIDE;
  63 #endif
  64
  65   /**
  66    * Get the "type" of the frame
  67    *
  68    * @see nsGkAtoms::svgFilterFrame
  69    */
  70   virtual nsIAtom* GetType() const MOZ_OVERRIDE;
  71
  72 private:
  73   // Parse our xlink:href and set up our nsSVGPaintingProperty if we
  74   // reference another filter and we don't have a property. Return
  75   // the referenced filter's frame if available, null otherwise.
  76   class AutoFilterReferencer;
  77   friend class nsSVGFilterInstance;
  78   nsSVGFilterFrame* GetReferencedFilter();
  79   nsSVGFilterFrame* GetReferencedFilterIfNotInUse();
  80
  81   // Accessors to lookup filter attributes
  82   uint16_t GetEnumValue(uint32_t aIndex, nsIContent *aDefault);
  83   uint16_t GetEnumValue(uint32_t aIndex)
  84   {
  85     return GetEnumValue(aIndex, mContent);
  86   }
  87   const nsSVGLength2 *GetLengthValue(uint32_t aIndex, nsIContent *aDefault);
  88   const nsSVGLength2 *GetLengthValue(uint32_t aIndex)
  89   {
  90     return GetLengthValue(aIndex, mContent);
  91   }
  92   const mozilla::dom::SVGFilterElement *GetFilterContent(nsIContent *aDefault);
  93   const mozilla::dom::SVGFilterElement *GetFilterContent()
  94   {
  95     return GetFilterContent(mContent);
  96   }
  97
  98   // This flag is used to detect loops in xlink:href processing
  99   bool                              mLoopFlag;
 100   bool                              mNoHRefURI;
 101 };
 102
 103 #endif