The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/layout/svg/SVGViewFrame.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,130 @@
     1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +// Keep in (case-insensitive) order:
    1.10 +#include "nsFrame.h"
    1.11 +#include "nsGkAtoms.h"
    1.12 +#include "nsSVGOuterSVGFrame.h"
    1.13 +#include "mozilla/dom/SVGSVGElement.h"
    1.14 +#include "mozilla/dom/SVGViewElement.h"
    1.15 +
    1.16 +typedef nsFrame SVGViewFrameBase;
    1.17 +
    1.18 +using namespace mozilla::dom;
    1.19 +
    1.20 +/**
    1.21 + * While views are not directly rendered in SVG they can be linked to
    1.22 + * and thereby override attributes of an <svg> element via a fragment
    1.23 + * identifier. The SVGViewFrame class passes on any attribute changes
    1.24 + * the view receives to the overridden <svg> element (if there is one).
    1.25 + **/
    1.26 +class SVGViewFrame : public SVGViewFrameBase
    1.27 +{
    1.28 +  friend nsIFrame*
    1.29 +  NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
    1.30 +protected:
    1.31 +  SVGViewFrame(nsStyleContext* aContext)
    1.32 +    : SVGViewFrameBase(aContext)
    1.33 +  {
    1.34 +    AddStateBits(NS_FRAME_IS_NONDISPLAY);
    1.35 +  }
    1.36 +
    1.37 +public:
    1.38 +  NS_DECL_FRAMEARENA_HELPERS
    1.39 +
    1.40 +#ifdef DEBUG
    1.41 +  virtual void Init(nsIContent* aContent,
    1.42 +                    nsIFrame*   aParent,
    1.43 +                    nsIFrame*   aPrevInFlow) MOZ_OVERRIDE;
    1.44 +#endif
    1.45 +
    1.46 +  virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
    1.47 +  {
    1.48 +    return SVGViewFrameBase::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
    1.49 +  }
    1.50 +
    1.51 +#ifdef DEBUG_FRAME_DUMP
    1.52 +  virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
    1.53 +  {
    1.54 +    return MakeFrameName(NS_LITERAL_STRING("SVGView"), aResult);
    1.55 +  }
    1.56 +#endif
    1.57 +
    1.58 +  /**
    1.59 +   * Get the "type" of the frame
    1.60 +   *
    1.61 +   * @see nsGkAtoms::svgFELeafFrame
    1.62 +   */
    1.63 +  virtual nsIAtom* GetType() const MOZ_OVERRIDE;
    1.64 +
    1.65 +  virtual nsresult AttributeChanged(int32_t  aNameSpaceID,
    1.66 +                                    nsIAtom* aAttribute,
    1.67 +                                    int32_t  aModType) MOZ_OVERRIDE;
    1.68 +
    1.69 +  virtual bool UpdateOverflow() MOZ_OVERRIDE {
    1.70 +    // We don't maintain a visual overflow rect
    1.71 +    return false;
    1.72 +  }
    1.73 +};
    1.74 +
    1.75 +nsIFrame*
    1.76 +NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
    1.77 +{
    1.78 +  return new (aPresShell) SVGViewFrame(aContext);
    1.79 +}
    1.80 +
    1.81 +NS_IMPL_FRAMEARENA_HELPERS(SVGViewFrame)
    1.82 +
    1.83 +#ifdef DEBUG
    1.84 +void
    1.85 +SVGViewFrame::Init(nsIContent* aContent,
    1.86 +                   nsIFrame* aParent,
    1.87 +                   nsIFrame* aPrevInFlow)
    1.88 +{
    1.89 +  NS_ASSERTION(aContent->IsSVG(nsGkAtoms::view),
    1.90 +               "Content is not an SVG view");
    1.91 +
    1.92 +  SVGViewFrameBase::Init(aContent, aParent, aPrevInFlow);
    1.93 +}
    1.94 +#endif /* DEBUG */
    1.95 +
    1.96 +nsIAtom *
    1.97 +SVGViewFrame::GetType() const
    1.98 +{
    1.99 +  return nsGkAtoms::svgViewFrame;
   1.100 +}
   1.101 +
   1.102 +nsresult
   1.103 +SVGViewFrame::AttributeChanged(int32_t  aNameSpaceID,
   1.104 +                               nsIAtom* aAttribute,
   1.105 +                               int32_t  aModType)
   1.106 +{
   1.107 +  // Ignore zoomAndPan as it does not cause the <svg> element to re-render
   1.108 +    
   1.109 +  if (aNameSpaceID == kNameSpaceID_None &&
   1.110 +      (aAttribute == nsGkAtoms::preserveAspectRatio ||
   1.111 +       aAttribute == nsGkAtoms::viewBox ||
   1.112 +       aAttribute == nsGkAtoms::viewTarget)) {
   1.113 +
   1.114 +    nsSVGOuterSVGFrame *outerSVGFrame = nsSVGUtils::GetOuterSVGFrame(this);
   1.115 +    NS_ASSERTION(outerSVGFrame->GetContent()->IsSVG(nsGkAtoms::svg),
   1.116 +                 "Expecting an <svg> element");
   1.117 +
   1.118 +    SVGSVGElement* svgElement =
   1.119 +      static_cast<SVGSVGElement*>(outerSVGFrame->GetContent());
   1.120 +
   1.121 +    nsAutoString viewID;
   1.122 +    mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::id, viewID);
   1.123 +
   1.124 +    if (svgElement->IsOverriddenBy(viewID)) {
   1.125 +      // We're the view that's providing overrides, so pretend that the frame
   1.126 +      // we're overriding was updated.
   1.127 +      outerSVGFrame->AttributeChanged(aNameSpaceID, aAttribute, aModType);
   1.128 +    }
   1.129 +  }
   1.130 +
   1.131 +  return SVGViewFrameBase::AttributeChanged(aNameSpaceID,
   1.132 +                                            aAttribute, aModType);
   1.133 +}