diff options
Diffstat (limited to 'dom/svg/SVGTransformableElement.cpp')
| -rw-r--r-- | dom/svg/SVGTransformableElement.cpp | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/dom/svg/SVGTransformableElement.cpp b/dom/svg/SVGTransformableElement.cpp new file mode 100644 index 000000000..a9028fc49 --- /dev/null +++ b/dom/svg/SVGTransformableElement.cpp @@ -0,0 +1,260 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#include "gfx2DGlue.h" +#include "mozilla/dom/SVGAnimatedTransformList.h" +#include "mozilla/dom/SVGGraphicsElementBinding.h" +#include "mozilla/dom/SVGTransformableElement.h" +#include "mozilla/dom/SVGMatrix.h" +#include "mozilla/dom/SVGSVGElement.h" +#include "nsContentUtils.h" +#include "nsIDOMMutationEvent.h" +#include "nsIFrame.h" +#include "nsISVGChildFrame.h" +#include "mozilla/dom/SVGRect.h" +#include "nsSVGUtils.h" +#include "SVGContentUtils.h" + +using namespace mozilla::gfx; + +namespace mozilla { +namespace dom { + +already_AddRefed<SVGAnimatedTransformList> +SVGTransformableElement::Transform() +{ + // We're creating a DOM wrapper, so we must tell GetAnimatedTransformList + // to allocate the SVGAnimatedTransformList if it hasn't already done so: + return SVGAnimatedTransformList::GetDOMWrapper( + GetAnimatedTransformList(DO_ALLOCATE), this); + +} + +//---------------------------------------------------------------------- +// nsIContent methods + +NS_IMETHODIMP_(bool) +SVGTransformableElement::IsAttributeMapped(const nsIAtom* name) const +{ + static const MappedAttributeEntry* const map[] = { + sColorMap, + sFillStrokeMap, + sGraphicsMap + }; + + return FindAttributeDependence(name, map) || + nsSVGElement::IsAttributeMapped(name); +} + +nsChangeHint +SVGTransformableElement::GetAttributeChangeHint(const nsIAtom* aAttribute, + int32_t aModType) const +{ + nsChangeHint retval = + nsSVGElement::GetAttributeChangeHint(aAttribute, aModType); + if (aAttribute == nsGkAtoms::transform || + aAttribute == nsGkAtoms::mozAnimateMotionDummyAttr) { + nsIFrame* frame = + const_cast<SVGTransformableElement*>(this)->GetPrimaryFrame(); + retval |= nsChangeHint_InvalidateRenderingObservers; + if (!frame || (frame->GetStateBits() & NS_FRAME_IS_NONDISPLAY)) { + return retval; + } + + bool isAdditionOrRemoval = false; + if (aModType == nsIDOMMutationEvent::ADDITION || + aModType == nsIDOMMutationEvent::REMOVAL) { + isAdditionOrRemoval = true; + } else { + MOZ_ASSERT(aModType == nsIDOMMutationEvent::MODIFICATION, + "Unknown modification type."); + if (!mTransforms || + !mTransforms->HasTransform() || + !mTransforms->HadTransformBeforeLastBaseValChange()) { + // New or old value is empty; this is effectively addition or removal. + isAdditionOrRemoval = true; + } + } + + if (isAdditionOrRemoval) { + // Reconstruct the frame tree to handle stacking context changes: + retval |= nsChangeHint_ReconstructFrame; + } else { + // We just assume the old and new transforms are different. + retval |= nsChangeHint_UpdatePostTransformOverflow | + nsChangeHint_UpdateTransformLayer; + } + } + return retval; +} + +bool +SVGTransformableElement::IsEventAttributeName(nsIAtom* aName) +{ + return nsContentUtils::IsEventAttributeName(aName, EventNameType_SVGGraphic); +} + +//---------------------------------------------------------------------- +// nsSVGElement overrides + +gfxMatrix +SVGTransformableElement::PrependLocalTransformsTo( + const gfxMatrix &aMatrix, + SVGTransformTypes aWhich) const +{ + return SVGContentUtils::PrependLocalTransformsTo( + aMatrix, aWhich, mAnimateMotionTransform, mTransforms); +} + +const gfx::Matrix* +SVGTransformableElement::GetAnimateMotionTransform() const +{ + return mAnimateMotionTransform.get(); +} + +void +SVGTransformableElement::SetAnimateMotionTransform(const gfx::Matrix* aMatrix) +{ + if ((!aMatrix && !mAnimateMotionTransform) || + (aMatrix && mAnimateMotionTransform && *aMatrix == *mAnimateMotionTransform)) { + return; + } + bool transformSet = mTransforms && mTransforms->IsExplicitlySet(); + bool prevSet = mAnimateMotionTransform || transformSet; + mAnimateMotionTransform = aMatrix ? new gfx::Matrix(*aMatrix) : nullptr; + bool nowSet = mAnimateMotionTransform || transformSet; + int32_t modType; + if (prevSet && !nowSet) { + modType = nsIDOMMutationEvent::REMOVAL; + } else if(!prevSet && nowSet) { + modType = nsIDOMMutationEvent::ADDITION; + } else { + modType = nsIDOMMutationEvent::MODIFICATION; + } + DidAnimateTransformList(modType); + nsIFrame* frame = GetPrimaryFrame(); + if (frame) { + // If the result of this transform and any other transforms on this frame + // is the identity matrix, then DoApplyRenderingChangeToTree won't handle + // our nsChangeHint_UpdateTransformLayer hint since aFrame->IsTransformed() + // will return false. That's fine, but we still need to schedule a repaint, + // and that won't otherwise happen. Since it's cheap to call SchedulePaint, + // we don't bother to check IsTransformed(). + frame->SchedulePaint(); + } +} + +nsSVGAnimatedTransformList* +SVGTransformableElement::GetAnimatedTransformList(uint32_t aFlags) +{ + if (!mTransforms && (aFlags & DO_ALLOCATE)) { + mTransforms = new nsSVGAnimatedTransformList(); + } + return mTransforms; +} + +nsSVGElement* +SVGTransformableElement::GetNearestViewportElement() +{ + return SVGContentUtils::GetNearestViewportElement(this); +} + +nsSVGElement* +SVGTransformableElement::GetFarthestViewportElement() +{ + return SVGContentUtils::GetOuterSVGElement(this); +} + +already_AddRefed<SVGIRect> +SVGTransformableElement::GetBBox(const SVGBoundingBoxOptions& aOptions, + ErrorResult& rv) +{ + nsIFrame* frame = GetPrimaryFrame(Flush_Layout); + + if (!frame || (frame->GetStateBits() & NS_FRAME_IS_NONDISPLAY)) { + rv.Throw(NS_ERROR_FAILURE); + return nullptr; + } + nsISVGChildFrame* svgframe = do_QueryFrame(frame); + if (!svgframe) { + rv.Throw(NS_ERROR_NOT_IMPLEMENTED); // XXX: outer svg + return nullptr; + } + + if (!NS_SVGNewGetBBoxEnabled()) { + return NS_NewSVGRect(this, ToRect(nsSVGUtils::GetBBox(frame))); + } else { + uint32_t flags = 0; + if (aOptions.mFill) { + flags |= nsSVGUtils::eBBoxIncludeFill; + } + if (aOptions.mStroke) { + flags |= nsSVGUtils::eBBoxIncludeStroke; + } + if (aOptions.mMarkers) { + flags |= nsSVGUtils::eBBoxIncludeMarkers; + } + if (aOptions.mClipped) { + flags |= nsSVGUtils::eBBoxIncludeClipped; + } + if (flags == 0) { + return NS_NewSVGRect(this,0,0,0,0); + } + if (flags == nsSVGUtils::eBBoxIncludeMarkers || + flags == nsSVGUtils::eBBoxIncludeClipped) { + flags |= nsSVGUtils::eBBoxIncludeFill; + } + return NS_NewSVGRect(this, ToRect(nsSVGUtils::GetBBox(frame, flags))); + } +} + +already_AddRefed<SVGMatrix> +SVGTransformableElement::GetCTM() +{ + nsIDocument* currentDoc = GetComposedDoc(); + if (currentDoc) { + // Flush all pending notifications so that our frames are up to date + currentDoc->FlushPendingNotifications(Flush_Layout); + } + gfx::Matrix m = SVGContentUtils::GetCTM(this, false); + RefPtr<SVGMatrix> mat = m.IsSingular() ? nullptr : new SVGMatrix(ThebesMatrix(m)); + return mat.forget(); +} + +already_AddRefed<SVGMatrix> +SVGTransformableElement::GetScreenCTM() +{ + nsIDocument* currentDoc = GetComposedDoc(); + if (currentDoc) { + // Flush all pending notifications so that our frames are up to date + currentDoc->FlushPendingNotifications(Flush_Layout); + } + gfx::Matrix m = SVGContentUtils::GetCTM(this, true); + RefPtr<SVGMatrix> mat = m.IsSingular() ? nullptr : new SVGMatrix(ThebesMatrix(m)); + return mat.forget(); +} + +already_AddRefed<SVGMatrix> +SVGTransformableElement::GetTransformToElement(SVGGraphicsElement& aElement, + ErrorResult& rv) +{ + // the easiest way to do this (if likely to increase rounding error): + RefPtr<SVGMatrix> ourScreenCTM = GetScreenCTM(); + RefPtr<SVGMatrix> targetScreenCTM = aElement.GetScreenCTM(); + if (!ourScreenCTM || !targetScreenCTM) { + rv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); + return nullptr; + } + RefPtr<SVGMatrix> tmp = targetScreenCTM->Inverse(rv); + if (rv.Failed()) return nullptr; + + RefPtr<SVGMatrix> mat = tmp->Multiply(*ourScreenCTM); + return mat.forget(); +} + +} // namespace dom +} // namespace mozilla + |