layout/svg/SVGFEContainerFrame.cpp

   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 // Keep in (case-insensitive) order:
   7 #include "nsContainerFrame.h"
   8 #include "nsGkAtoms.h"
   9 #include "nsIFrame.h"
  10 #include "nsLiteralString.h"
  11 #include "nsSVGEffects.h"
  12 #include "nsSVGFilters.h"
  13
  14 typedef nsContainerFrame SVGFEContainerFrameBase;
  15
  16 /*
  17  * This frame is used by filter primitive elements that
  18  * have special child elements that provide parameters.
  19  */
  20 class SVGFEContainerFrame : public SVGFEContainerFrameBase
  21 {
  22   friend nsIFrame*
  23   NS_NewSVGFEContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  24 protected:
  25   explicit SVGFEContainerFrame(nsStyleContext* aContext)
  26     : SVGFEContainerFrameBase(aContext)
  27   {
  28     AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
  29   }
  30
  31 public:
  32   NS_DECL_FRAMEARENA_HELPERS
  33
  34   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
  35   {
  36     return SVGFEContainerFrameBase::IsFrameOfType(
  37             aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGContainer));
  38   }
  39
  40 #ifdef DEBUG_FRAME_DUMP
  41   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
  42   {
  43     return MakeFrameName(NS_LITERAL_STRING("SVGFEContainer"), aResult);
  44   }
  45 #endif
  46
  47 #ifdef DEBUG
  48   virtual void Init(nsIContent*       aContent,
  49                     nsContainerFrame* aParent,
  50                     nsIFrame*         aPrevInFlow) MOZ_OVERRIDE;
  51 #endif
  52   /**
  53    * Get the "type" of the frame
  54    *
  55    * @see nsGkAtoms::svgFEContainerFrame
  56    */
  57   virtual nsIAtom* GetType() const MOZ_OVERRIDE;
  58
  59   virtual nsresult AttributeChanged(int32_t  aNameSpaceID,
  60                                     nsIAtom* aAttribute,
  61                                     int32_t  aModType) MOZ_OVERRIDE;
  62
  63   virtual bool UpdateOverflow() MOZ_OVERRIDE {
  64     // We don't maintain a visual overflow rect
  65     return false;
  66   }
  67 };
  68
  69 nsIFrame*
  70 NS_NewSVGFEContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
  71 {
  72   return new (aPresShell) SVGFEContainerFrame(aContext);
  73 }
  74
  75 NS_IMPL_FRAMEARENA_HELPERS(SVGFEContainerFrame)
  76
  77 #ifdef DEBUG
  78 void
  79 SVGFEContainerFrame::Init(nsIContent*       aContent,
  80                           nsContainerFrame* aParent,
  81                           nsIFrame*         aPrevInFlow)
  82 {
  83   NS_ASSERTION(aContent->IsNodeOfType(nsINode::eFILTER),
  84                "Trying to construct an SVGFEContainerFrame for a "
  85                "content element that doesn't support the right interfaces");
  86
  87   SVGFEContainerFrameBase::Init(aContent, aParent, aPrevInFlow);
  88 }
  89 #endif /* DEBUG */
  90
  91 nsIAtom *
  92 SVGFEContainerFrame::GetType() const
  93 {
  94   return nsGkAtoms::svgFEContainerFrame;
  95 }
  96
  97 nsresult
  98 SVGFEContainerFrame::AttributeChanged(int32_t  aNameSpaceID,
  99                                       nsIAtom* aAttribute,
 100                                       int32_t  aModType)
 101 {
 102   nsSVGFE *element = static_cast<nsSVGFE*>(mContent);
 103   if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
 104     nsSVGEffects::InvalidateRenderingObservers(this);
 105   }
 106
 107   return SVGFEContainerFrameBase::AttributeChanged(aNameSpaceID,
 108                                                      aAttribute, aModType);
 109 }