layout/svg/SVGForeignObjectFrame.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_SVGFOREIGNOBJECTFRAME_H_
   8 #define LAYOUT_SVG_SVGFOREIGNOBJECTFRAME_H_
   9
  10 #include "mozilla/Attributes.h"
  11 #include "mozilla/ISVGDisplayableFrame.h"
  12 #include "mozilla/PresShellForwards.h"
  13 #include "mozilla/UniquePtr.h"
  14 #include "nsContainerFrame.h"
  15 #include "nsRegion.h"
  16
  17 class gfxContext;
  18
  19 nsContainerFrame* NS_NewSVGForeignObjectFrame(mozilla::PresShell* aPresShell,
  20                                               mozilla::ComputedStyle* aStyle);
  21
  22 namespace mozilla {
  23
  24 class SVGForeignObjectFrame final : public nsContainerFrame,
  25                                     public ISVGDisplayableFrame {
  26   friend nsContainerFrame* ::NS_NewSVGForeignObjectFrame(
  27       mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
  28
  29  protected:
  30   explicit SVGForeignObjectFrame(ComputedStyle* aStyle,
  31                                  nsPresContext* aPresContext);
  32
  33  public:
  34   NS_DECL_QUERYFRAME
  35   NS_DECL_FRAMEARENA_HELPERS(SVGForeignObjectFrame)
  36
  37   // nsIFrame:
  38   void Init(nsIContent* aContent, nsContainerFrame* aParent,
  39             nsIFrame* aPrevInFlow) override;
  40   void DestroyFrom(nsIFrame* aDestructRoot,
  41                    PostDestroyData& aPostDestroyData) override;
  42   nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
  43                             int32_t aModType) override;
  44
  45   nsContainerFrame* GetContentInsertionFrame() override {
  46     return PrincipalChildList().FirstChild()->GetContentInsertionFrame();
  47   }
  48
  49   void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
  50               const ReflowInput& aReflowInput,
  51               nsReflowStatus& aStatus) override;
  52
  53   void BuildDisplayList(nsDisplayListBuilder* aBuilder,
  54                         const nsDisplayListSet& aLists) override;
  55
  56   bool IsFrameOfType(uint32_t aFlags) const override {
  57     if (aFlags & eSupportsContainLayoutAndPaint) {
  58       return false;
  59     }
  60
  61     return nsContainerFrame::IsFrameOfType(aFlags & ~nsIFrame::eSVG);
  62   }
  63
  64   bool IsSVGTransformed(Matrix* aOwnTransform,
  65                         Matrix* aFromParentTransform) const override;
  66
  67 #ifdef DEBUG_FRAME_DUMP
  68   nsresult GetFrameName(nsAString& aResult) const override {
  69     return MakeFrameName(u"SVGForeignObject"_ns, aResult);
  70   }
  71 #endif
  72
  73   // ISVGDisplayableFrame interface:
  74   void PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
  75                 imgDrawingParams& aImgParams,
  76                 const nsIntRect* aDirtyRect = nullptr) override;
  77   nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
  78   void ReflowSVG() override;
  79   void NotifySVGChanged(uint32_t aFlags) override;
  80   SVGBBox GetBBoxContribution(const Matrix& aToBBoxUserspace,
  81                               uint32_t aFlags) override;
  82   bool IsDisplayContainer() override { return true; }
  83
  84   gfxMatrix GetCanvasTM();
  85
  86   nsRect GetInvalidRegion();
  87
  88   // Return our ::-moz-svg-foreign-content anonymous box.
  89   void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;
  90
  91   void DidSetComputedStyle(ComputedStyle* aOldComputedStyle) override;
  92
  93  protected:
  94   // implementation helpers:
  95   void DoReflow();
  96   void RequestReflow(IntrinsicDirty aType);
  97
  98   // If width or height is less than or equal to zero we must disable rendering
  99   bool IsDisabled() const { return mRect.width <= 0 || mRect.height <= 0; }
 100
 101   UniquePtr<gfxMatrix> mCanvasTM;
 102
 103   bool mInReflow;
 104 };
 105
 106 }  // namespace mozilla
 107
 108 #endif  // LAYOUT_SVG_SVGFOREIGNOBJECTFRAME_H_