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