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