layout/svg/SVGFilterFrame.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef LAYOUT_SVG_SVGFILTERFRAME_H_
   8 #define LAYOUT_SVG_SVGFILTERFRAME_H_
   9
  10 #include "mozilla/Attributes.h"
  11 #include "mozilla/SVGContainerFrame.h"
  12 #include "nsQueryFrame.h"
  13
  14 class nsAtom;
  15 class nsIContent;
  16 class nsIFrame;
  17
  18 struct nsRect;
  19
  20 namespace mozilla {
  21 class SVGAnimatedLength;
  22 class SVGFilterInstance;
  23 class PresShell;
  24
  25 namespace dom {
  26 class SVGFilterElement;
  27 }  // namespace dom
  28 }  // namespace mozilla
  29
  30 nsIFrame* NS_NewSVGFilterFrame(mozilla::PresShell* aPresShell,
  31                                mozilla::ComputedStyle* aStyle);
  32
  33 namespace mozilla {
  34
  35 class SVGFilterFrame final : public SVGContainerFrame {
  36   friend nsIFrame* ::NS_NewSVGFilterFrame(mozilla::PresShell* aPresShell,
  37                                           ComputedStyle* aStyle);
  38
  39  protected:
  40   explicit SVGFilterFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
  41       : SVGContainerFrame(aStyle, aPresContext, kClassID),
  42         mLoopFlag(false),
  43         mNoHRefURI(false) {
  44     AddStateBits(NS_FRAME_IS_NONDISPLAY);
  45   }
  46
  47  public:
  48   NS_DECL_FRAMEARENA_HELPERS(SVGFilterFrame)
  49
  50   // nsIFrame methods:
  51   virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
  52                                 const nsDisplayListSet& aLists) override {}
  53
  54   virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
  55                                     int32_t aModType) override;
  56
  57 #ifdef DEBUG
  58   virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
  59                     nsIFrame* aPrevInFlow) override;
  60 #endif
  61
  62  private:
  63   friend class SVGFilterInstance;
  64
  65   /**
  66    * Parses this frame's href and - if it references another filter - returns
  67    * it.  It also makes this frame a rendering observer of the specified ID.
  68    */
  69   SVGFilterFrame* GetReferencedFilter();
  70
  71   // Accessors to lookup filter attributes
  72   uint16_t GetEnumValue(uint32_t aIndex, nsIContent* aDefault);
  73   uint16_t GetEnumValue(uint32_t aIndex) {
  74     return GetEnumValue(aIndex, mContent);
  75   }
  76   const mozilla::SVGAnimatedLength* GetLengthValue(uint32_t aIndex,
  77                                                    nsIContent* aDefault);
  78   const mozilla::SVGAnimatedLength* GetLengthValue(uint32_t aIndex) {
  79     return GetLengthValue(aIndex, mContent);
  80   }
  81   const mozilla::dom::SVGFilterElement* GetFilterContent(nsIContent* aDefault);
  82   const mozilla::dom::SVGFilterElement* GetFilterContent() {
  83     return GetFilterContent(mContent);
  84   }
  85
  86   // This flag is used to detect loops in xlink:href processing
  87   bool mLoopFlag;
  88   bool mNoHRefURI;
  89 };
  90
  91 }  // namespace mozilla
  92
  93 #endif  // LAYOUT_SVG_SVGFILTERFRAME_H_