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: // Main header first:
michael@0: #include "nsSVGGFrame.h"
michael@0: 
michael@0: // Keep others in (case-insensitive) order:
michael@0: #include "nsGkAtoms.h"
michael@0: #include "SVGTransformableElement.h"
michael@0: #include "nsIFrame.h"
michael@0: #include "SVGGraphicsElement.h"
michael@0: #include "nsSVGIntegrationUtils.h"
michael@0: #include "nsSVGUtils.h"
michael@0: 
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: //----------------------------------------------------------------------
michael@0: // Implementation
michael@0: 
michael@0: nsIFrame*
michael@0: NS_NewSVGGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
michael@0: {  
michael@0:   return new (aPresShell) nsSVGGFrame(aContext);
michael@0: }
michael@0: 
michael@0: NS_IMPL_FRAMEARENA_HELPERS(nsSVGGFrame)
michael@0: 
michael@0: #ifdef DEBUG
michael@0: void
michael@0: nsSVGGFrame::Init(nsIContent* aContent,
michael@0:                   nsIFrame* aParent,
michael@0:                   nsIFrame* aPrevInFlow)
michael@0: {
michael@0:   NS_ASSERTION(aContent->IsSVG() &&
michael@0:                static_cast<nsSVGElement*>(aContent)->IsTransformable(),
michael@0:                "The element doesn't support nsIDOMSVGTransformable");
michael@0: 
michael@0:   nsSVGGFrameBase::Init(aContent, aParent, aPrevInFlow);
michael@0: }
michael@0: #endif /* DEBUG */
michael@0: 
michael@0: nsIAtom *
michael@0: nsSVGGFrame::GetType() const
michael@0: {
michael@0:   return nsGkAtoms::svgGFrame;
michael@0: }
michael@0: 
michael@0: //----------------------------------------------------------------------
michael@0: // nsISVGChildFrame methods
michael@0: 
michael@0: void
michael@0: nsSVGGFrame::NotifySVGChanged(uint32_t aFlags)
michael@0: {
michael@0:   NS_ABORT_IF_FALSE(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
michael@0:                     "Invalidation logic may need adjusting");
michael@0: 
michael@0:   if (aFlags & TRANSFORM_CHANGED) {
michael@0:     // make sure our cached transform matrix gets (lazily) updated
michael@0:     mCanvasTM = nullptr;
michael@0:   }
michael@0: 
michael@0:   nsSVGGFrameBase::NotifySVGChanged(aFlags);
michael@0: }
michael@0: 
michael@0: gfxMatrix
michael@0: nsSVGGFrame::GetCanvasTM(uint32_t aFor, nsIFrame* aTransformRoot)
michael@0: {
michael@0:   if (!(GetStateBits() & NS_FRAME_IS_NONDISPLAY) && !aTransformRoot) {
michael@0:     if ((aFor == FOR_PAINTING && NS_SVGDisplayListPaintingEnabled()) ||
michael@0:         (aFor == FOR_HIT_TESTING && NS_SVGDisplayListHitTestingEnabled())) {
michael@0:       return nsSVGIntegrationUtils::GetCSSPxToDevPxMatrix(this);
michael@0:     }
michael@0:   }
michael@0:   if (!mCanvasTM) {
michael@0:     NS_ASSERTION(mParent, "null parent");
michael@0: 
michael@0:     nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent);
michael@0:     SVGGraphicsElement *content = static_cast<SVGGraphicsElement*>(mContent);
michael@0:     gfxMatrix tm = content->PrependLocalTransformsTo(
michael@0:         this == aTransformRoot ? gfxMatrix() :
michael@0:                                  parent->GetCanvasTM(aFor, aTransformRoot));
michael@0: 
michael@0:     mCanvasTM = new gfxMatrix(tm);
michael@0:   }
michael@0:   return *mCanvasTM;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsSVGGFrame::AttributeChanged(int32_t         aNameSpaceID,
michael@0:                               nsIAtom*        aAttribute,
michael@0:                               int32_t         aModType)
michael@0: {
michael@0:   if (aNameSpaceID == kNameSpaceID_None &&
michael@0:       aAttribute == nsGkAtoms::transform) {
michael@0:     // We don't invalidate for transform changes (the layers code does that).
michael@0:     // Also note that SVGTransformableElement::GetAttributeChangeHint will
michael@0:     // return nsChangeHint_UpdateOverflow for "transform" attribute changes
michael@0:     // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
michael@0:     NotifySVGChanged(TRANSFORM_CHANGED);
michael@0:   }
michael@0:   
michael@0:   return NS_OK;
michael@0: }