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Diffstat (limited to '')
-rw-r--r-- | dom/svg/SVGTransformableElement.cpp | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/dom/svg/SVGTransformableElement.cpp b/dom/svg/SVGTransformableElement.cpp new file mode 100644 index 0000000000..adbbe10719 --- /dev/null +++ b/dom/svg/SVGTransformableElement.cpp @@ -0,0 +1,150 @@ +/* -*- 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 "SVGTransformableElement.h" + +#include "DOMSVGAnimatedTransformList.h" +#include "mozilla/dom/MutationEventBinding.h" +#include "nsContentUtils.h" +#include "nsIFrame.h" + +using namespace mozilla::gfx; + +namespace mozilla::dom { + +already_AddRefed<DOMSVGAnimatedTransformList> +SVGTransformableElement::Transform() { + // We're creating a DOM wrapper, so we must tell GetAnimatedTransformList + // to allocate the DOMSVGAnimatedTransformList if it hasn't already done so: + return DOMSVGAnimatedTransformList::GetDOMWrapper( + GetAnimatedTransformList(DO_ALLOCATE), this); +} + +//---------------------------------------------------------------------- +// nsIContent methods + +nsChangeHint SVGTransformableElement::GetAttributeChangeHint( + const nsAtom* aAttribute, int32_t aModType) const { + nsChangeHint retval = + SVGElement::GetAttributeChangeHint(aAttribute, aModType); + if (aAttribute == nsGkAtoms::transform || + aAttribute == nsGkAtoms::mozAnimateMotionDummyAttr) { + nsIFrame* frame = GetPrimaryFrame(); + retval |= nsChangeHint_InvalidateRenderingObservers; + if (!frame || frame->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { + return retval; + } + + bool isAdditionOrRemoval = false; + if (aModType == MutationEvent_Binding::ADDITION || + aModType == MutationEvent_Binding::REMOVAL) { + isAdditionOrRemoval = true; + } else { + MOZ_ASSERT(aModType == MutationEvent_Binding::MODIFICATION, + "Unknown modification type."); + if (!mTransforms || !mTransforms->HasTransform()) { + // New value is empty, treat as removal. + // FIXME: Should we just rely on CreatedOrRemovedOnLastChange? + isAdditionOrRemoval = true; + } else if (mTransforms->CreatedOrRemovedOnLastChange()) { + // Old value was empty, treat as addition. + isAdditionOrRemoval = true; + } + } + + if (isAdditionOrRemoval) { + retval |= nsChangeHint_ComprehensiveAddOrRemoveTransform; + } else { + // We just assume the old and new transforms are different. + retval |= nsChangeHint_UpdatePostTransformOverflow | + nsChangeHint_UpdateTransformLayer; + } + } + return retval; +} + +bool SVGTransformableElement::IsEventAttributeNameInternal(nsAtom* aName) { + return nsContentUtils::IsEventAttributeName(aName, EventNameType_SVGGraphic); +} + +//---------------------------------------------------------------------- +// SVGElement overrides + +gfxMatrix SVGTransformableElement::PrependLocalTransformsTo( + const gfxMatrix& aMatrix, SVGTransformTypes aWhich) const { + if (aWhich == eChildToUserSpace) { + // We don't have any eUserSpaceToParent transforms. (Sub-classes that do + // must override this function and handle that themselves.) + return aMatrix; + } + return GetUserToParentTransform(mAnimateMotionTransform.get(), + mTransforms.get()) * + aMatrix; +} + +const gfx::Matrix* SVGTransformableElement::GetAnimateMotionTransform() const { + return mAnimateMotionTransform.get(); +} + +void SVGTransformableElement::SetAnimateMotionTransform( + const gfx::Matrix* aMatrix) { + if ((!aMatrix && !mAnimateMotionTransform) || + (aMatrix && mAnimateMotionTransform && + aMatrix->FuzzyEquals(*mAnimateMotionTransform))) { + return; + } + bool transformSet = mTransforms && mTransforms->IsExplicitlySet(); + bool prevSet = mAnimateMotionTransform || transformSet; + mAnimateMotionTransform = + aMatrix ? MakeUnique<gfx::Matrix>(*aMatrix) : nullptr; + bool nowSet = mAnimateMotionTransform || transformSet; + int32_t modType; + if (prevSet && !nowSet) { + modType = MutationEvent_Binding::REMOVAL; + } else if (!prevSet && nowSet) { + modType = MutationEvent_Binding::ADDITION; + } else { + modType = MutationEvent_Binding::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(); + } +} + +SVGAnimatedTransformList* SVGTransformableElement::GetAnimatedTransformList( + uint32_t aFlags) { + if (!mTransforms && (aFlags & DO_ALLOCATE)) { + mTransforms = MakeUnique<SVGAnimatedTransformList>(); + } + return mTransforms.get(); +} + +/* static */ +gfxMatrix SVGTransformableElement::GetUserToParentTransform( + const gfx::Matrix* aAnimateMotionTransform, + const SVGAnimatedTransformList* aTransforms) { + gfxMatrix result; + + if (aAnimateMotionTransform) { + result.PreMultiply(ThebesMatrix(*aAnimateMotionTransform)); + } + + if (aTransforms) { + result.PreMultiply(aTransforms->GetAnimValue().GetConsolidationMatrix()); + } + + return result; +} + +} // namespace mozilla::dom |