michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: // Keep in (case-insensitive) order:
michael@0: #include "nsFrame.h"
michael@0: #include "nsGkAtoms.h"
michael@0: #include "nsSVGOuterSVGFrame.h"
michael@0: #include "mozilla/dom/SVGSVGElement.h"
michael@0: #include "mozilla/dom/SVGViewElement.h"
michael@0: 
michael@0: typedef nsFrame SVGViewFrameBase;
michael@0: 
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: /**
michael@0:  * While views are not directly rendered in SVG they can be linked to
michael@0:  * and thereby override attributes of an <svg> element via a fragment
michael@0:  * identifier. The SVGViewFrame class passes on any attribute changes
michael@0:  * the view receives to the overridden <svg> element (if there is one).
michael@0:  **/
michael@0: class SVGViewFrame : public SVGViewFrameBase
michael@0: {
michael@0:   friend nsIFrame*
michael@0:   NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
michael@0: protected:
michael@0:   SVGViewFrame(nsStyleContext* aContext)
michael@0:     : SVGViewFrameBase(aContext)
michael@0:   {
michael@0:     AddStateBits(NS_FRAME_IS_NONDISPLAY);
michael@0:   }
michael@0: 
michael@0: public:
michael@0:   NS_DECL_FRAMEARENA_HELPERS
michael@0: 
michael@0: #ifdef DEBUG
michael@0:   virtual void Init(nsIContent* aContent,
michael@0:                     nsIFrame*   aParent,
michael@0:                     nsIFrame*   aPrevInFlow) MOZ_OVERRIDE;
michael@0: #endif
michael@0: 
michael@0:   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
michael@0:   {
michael@0:     return SVGViewFrameBase::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
michael@0:   }
michael@0: 
michael@0: #ifdef DEBUG_FRAME_DUMP
michael@0:   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
michael@0:   {
michael@0:     return MakeFrameName(NS_LITERAL_STRING("SVGView"), aResult);
michael@0:   }
michael@0: #endif
michael@0: 
michael@0:   /**
michael@0:    * Get the "type" of the frame
michael@0:    *
michael@0:    * @see nsGkAtoms::svgFELeafFrame
michael@0:    */
michael@0:   virtual nsIAtom* GetType() const MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsresult AttributeChanged(int32_t  aNameSpaceID,
michael@0:                                     nsIAtom* aAttribute,
michael@0:                                     int32_t  aModType) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual bool UpdateOverflow() MOZ_OVERRIDE {
michael@0:     // We don't maintain a visual overflow rect
michael@0:     return false;
michael@0:   }
michael@0: };
michael@0: 
michael@0: nsIFrame*
michael@0: NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
michael@0: {
michael@0:   return new (aPresShell) SVGViewFrame(aContext);
michael@0: }
michael@0: 
michael@0: NS_IMPL_FRAMEARENA_HELPERS(SVGViewFrame)
michael@0: 
michael@0: #ifdef DEBUG
michael@0: void
michael@0: SVGViewFrame::Init(nsIContent* aContent,
michael@0:                    nsIFrame* aParent,
michael@0:                    nsIFrame* aPrevInFlow)
michael@0: {
michael@0:   NS_ASSERTION(aContent->IsSVG(nsGkAtoms::view),
michael@0:                "Content is not an SVG view");
michael@0: 
michael@0:   SVGViewFrameBase::Init(aContent, aParent, aPrevInFlow);
michael@0: }
michael@0: #endif /* DEBUG */
michael@0: 
michael@0: nsIAtom *
michael@0: SVGViewFrame::GetType() const
michael@0: {
michael@0:   return nsGkAtoms::svgViewFrame;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: SVGViewFrame::AttributeChanged(int32_t  aNameSpaceID,
michael@0:                                nsIAtom* aAttribute,
michael@0:                                int32_t  aModType)
michael@0: {
michael@0:   // Ignore zoomAndPan as it does not cause the <svg> element to re-render
michael@0:     
michael@0:   if (aNameSpaceID == kNameSpaceID_None &&
michael@0:       (aAttribute == nsGkAtoms::preserveAspectRatio ||
michael@0:        aAttribute == nsGkAtoms::viewBox ||
michael@0:        aAttribute == nsGkAtoms::viewTarget)) {
michael@0: 
michael@0:     nsSVGOuterSVGFrame *outerSVGFrame = nsSVGUtils::GetOuterSVGFrame(this);
michael@0:     NS_ASSERTION(outerSVGFrame->GetContent()->IsSVG(nsGkAtoms::svg),
michael@0:                  "Expecting an <svg> element");
michael@0: 
michael@0:     SVGSVGElement* svgElement =
michael@0:       static_cast<SVGSVGElement*>(outerSVGFrame->GetContent());
michael@0: 
michael@0:     nsAutoString viewID;
michael@0:     mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::id, viewID);
michael@0: 
michael@0:     if (svgElement->IsOverriddenBy(viewID)) {
michael@0:       // We're the view that's providing overrides, so pretend that the frame
michael@0:       // we're overriding was updated.
michael@0:       outerSVGFrame->AttributeChanged(aNameSpaceID, aAttribute, aModType);
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   return SVGViewFrameBase::AttributeChanged(aNameSpaceID,
michael@0:                                             aAttribute, aModType);
michael@0: }