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/* -*- 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 =
const_cast<SVGTransformableElement*>(this)->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
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