mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-29 15:52:07 +00:00
128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
// Keep in (case-insensitive) order:
|
|
#include "nsFrame.h"
|
|
#include "nsGkAtoms.h"
|
|
#include "nsSVGOuterSVGFrame.h"
|
|
#include "mozilla/dom/SVGSVGElement.h"
|
|
#include "mozilla/dom/SVGViewElement.h"
|
|
|
|
using namespace mozilla::dom;
|
|
|
|
/**
|
|
* While views are not directly rendered in SVG they can be linked to
|
|
* and thereby override attributes of an <svg> element via a fragment
|
|
* identifier. The SVGViewFrame class passes on any attribute changes
|
|
* the view receives to the overridden <svg> element (if there is one).
|
|
**/
|
|
class SVGViewFrame : public nsFrame
|
|
{
|
|
friend nsIFrame*
|
|
NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
|
|
protected:
|
|
explicit SVGViewFrame(nsStyleContext* aContext)
|
|
: nsFrame(aContext)
|
|
{
|
|
AddStateBits(NS_FRAME_IS_NONDISPLAY);
|
|
}
|
|
|
|
public:
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
#ifdef DEBUG
|
|
virtual void Init(nsIContent* aContent,
|
|
nsContainerFrame* aParent,
|
|
nsIFrame* aPrevInFlow) override;
|
|
#endif
|
|
|
|
virtual bool IsFrameOfType(uint32_t aFlags) const override
|
|
{
|
|
return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
|
|
}
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
virtual nsresult GetFrameName(nsAString& aResult) const override
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("SVGView"), aResult);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Get the "type" of the frame
|
|
*
|
|
* @see nsGkAtoms::svgFELeafFrame
|
|
*/
|
|
virtual nsIAtom* GetType() const override;
|
|
|
|
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType) override;
|
|
|
|
virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override {
|
|
// We don't maintain a visual overflow rect
|
|
return false;
|
|
}
|
|
};
|
|
|
|
nsIFrame*
|
|
NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
|
|
{
|
|
return new (aPresShell) SVGViewFrame(aContext);
|
|
}
|
|
|
|
NS_IMPL_FRAMEARENA_HELPERS(SVGViewFrame)
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
SVGViewFrame::Init(nsIContent* aContent,
|
|
nsContainerFrame* aParent,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::view),
|
|
"Content is not an SVG view");
|
|
|
|
nsFrame::Init(aContent, aParent, aPrevInFlow);
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
nsIAtom *
|
|
SVGViewFrame::GetType() const
|
|
{
|
|
return nsGkAtoms::svgViewFrame;
|
|
}
|
|
|
|
nsresult
|
|
SVGViewFrame::AttributeChanged(int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType)
|
|
{
|
|
// Ignore zoomAndPan as it does not cause the <svg> element to re-render
|
|
|
|
if (aNameSpaceID == kNameSpaceID_None &&
|
|
(aAttribute == nsGkAtoms::preserveAspectRatio ||
|
|
aAttribute == nsGkAtoms::viewBox ||
|
|
aAttribute == nsGkAtoms::viewTarget)) {
|
|
|
|
nsSVGOuterSVGFrame *outerSVGFrame = nsSVGUtils::GetOuterSVGFrame(this);
|
|
NS_ASSERTION(outerSVGFrame->GetContent()->IsSVGElement(nsGkAtoms::svg),
|
|
"Expecting an <svg> element");
|
|
|
|
SVGSVGElement* svgElement =
|
|
static_cast<SVGSVGElement*>(outerSVGFrame->GetContent());
|
|
|
|
nsAutoString viewID;
|
|
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::id, viewID);
|
|
|
|
if (svgElement->IsOverriddenBy(viewID)) {
|
|
// We're the view that's providing overrides, so pretend that the frame
|
|
// we're overriding was updated.
|
|
outerSVGFrame->AttributeChanged(aNameSpaceID, aAttribute, aModType);
|
|
}
|
|
}
|
|
|
|
return nsFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
|
|
}
|