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