layout/svg/nsSVGForeignObjectFrame.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 NSSVGFOREIGNOBJECTFRAME_H__
   8 #define NSSVGFOREIGNOBJECTFRAME_H__
   9
  10 #include "mozilla/Attributes.h"
  11 #include "mozilla/PresShellForwards.h"
  12 #include "nsAutoPtr.h"
  13 #include "nsContainerFrame.h"
  14 #include "nsSVGDisplayableFrame.h"
  15 #include "nsRegion.h"
  16 #include "nsSVGUtils.h"
  17
  18 class gfxContext;
  19
  20 class nsSVGForeignObjectFrame final : public nsContainerFrame,
  21                                       public nsSVGDisplayableFrame {
  22   friend nsContainerFrame* NS_NewSVGForeignObjectFrame(
  23       mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
  24
  25  protected:
  26   explicit nsSVGForeignObjectFrame(ComputedStyle* aStyle,
  27                                    nsPresContext* aPresContext);
  28
  29  public:
  30   NS_DECL_QUERYFRAME
  31   NS_DECL_FRAMEARENA_HELPERS(nsSVGForeignObjectFrame)
  32
  33   // nsIFrame:
  34   virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
  35                     nsIFrame* aPrevInFlow) override;
  36   virtual void DestroyFrom(nsIFrame* aDestructRoot,
  37                            PostDestroyData& aPostDestroyData) override;
  38   virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
  39                                     int32_t aModType) override;
  40
  41   virtual nsContainerFrame* GetContentInsertionFrame() override {
  42     return PrincipalChildList().FirstChild()->GetContentInsertionFrame();
  43   }
  44
  45   virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
  46                       const ReflowInput& aReflowInput,
  47                       nsReflowStatus& aStatus) override;
  48
  49   virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
  50                                 const nsDisplayListSet& aLists) override;
  51
  52   virtual bool IsFrameOfType(uint32_t aFlags) const override {
  53     if (aFlags & eSupportsContainLayoutAndPaint) {
  54       return false;
  55     }
  56
  57     return nsContainerFrame::IsFrameOfType(
  58         aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGForeignObject));
  59   }
  60
  61   virtual bool IsSVGTransformed(Matrix* aOwnTransform,
  62                                 Matrix* aFromParentTransform) const override;
  63
  64 #ifdef DEBUG_FRAME_DUMP
  65   virtual nsresult GetFrameName(nsAString& aResult) const override {
  66     return MakeFrameName(NS_LITERAL_STRING("SVGForeignObject"), aResult);
  67   }
  68 #endif
  69
  70   // nsSVGDisplayableFrame interface:
  71   virtual void PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
  72                         imgDrawingParams& aImgParams,
  73                         const nsIntRect* aDirtyRect = nullptr) override;
  74   virtual nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
  75   virtual void ReflowSVG() override;
  76   virtual void NotifySVGChanged(uint32_t aFlags) override;
  77   virtual SVGBBox GetBBoxContribution(const Matrix& aToBBoxUserspace,
  78                                       uint32_t aFlags) override;
  79   virtual bool IsDisplayContainer() override { return true; }
  80
  81   gfxMatrix GetCanvasTM();
  82
  83   nsRect GetInvalidRegion();
  84
  85   // Return our ::-moz-svg-foreign-content anonymous box.
  86   void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;
  87
  88   virtual void DidSetComputedStyle(ComputedStyle* aOldComputedStyle) override;
  89
  90  protected:
  91   // implementation helpers:
  92   void DoReflow();
  93   void RequestReflow(mozilla::IntrinsicDirty aType);
  94
  95   // If width or height is less than or equal to zero we must disable rendering
  96   bool IsDisabled() const { return mRect.width <= 0 || mRect.height <= 0; }
  97
  98   nsAutoPtr<gfxMatrix> mCanvasTM;
  99
 100   bool mInReflow;
 101 };
 102
 103 #endif