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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/svg/nsSVGAnimatedTransformList.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/svg/nsSVGAnimatedTransformList.cpp')
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diff --git a/dom/svg/nsSVGAnimatedTransformList.cpp b/dom/svg/nsSVGAnimatedTransformList.cpp
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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 "nsSVGAnimatedTransformList.h"
+
+#include "mozilla/dom/SVGAnimatedTransformList.h"
+#include "mozilla/dom/SVGAnimationElement.h"
+#include "mozilla/Move.h"
+#include "nsCharSeparatedTokenizer.h"
+#include "nsSVGTransform.h"
+#include "nsSMILValue.h"
+#include "SVGContentUtils.h"
+#include "SVGTransformListSMILType.h"
+#include "nsIDOMMutationEvent.h"
+
+namespace mozilla {
+
+using namespace dom;
+
+nsresult
+nsSVGAnimatedTransformList::SetBaseValueString(const nsAString& aValue)
+{
+ SVGTransformList newBaseValue;
+ nsresult rv = newBaseValue.SetValueFromString(aValue);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ return SetBaseValue(newBaseValue);
+}
+
+nsresult
+nsSVGAnimatedTransformList::SetBaseValue(const SVGTransformList& aValue)
+{
+ SVGAnimatedTransformList *domWrapper =
+ SVGAnimatedTransformList::GetDOMWrapperIfExists(this);
+ if (domWrapper) {
+ // We must send this notification *before* changing mBaseVal! If the length
+ // of our baseVal is being reduced, our baseVal's DOM wrapper list may have
+ // to remove DOM items from itself, and any removed DOM items need to copy
+ // their internal counterpart values *before* we change them.
+ //
+ domWrapper->InternalBaseValListWillChangeLengthTo(aValue.Length());
+ }
+
+ // (This bool will be copied to our member-var, if attr-change succeeds.)
+ bool hadTransform = HasTransform();
+
+ // We don't need to call DidChange* here - we're only called by
+ // nsSVGElement::ParseAttribute under Element::SetAttr,
+ // which takes care of notifying.
+
+ nsresult rv = mBaseVal.CopyFrom(aValue);
+ if (NS_FAILED(rv) && domWrapper) {
+ // Attempting to increase mBaseVal's length failed - reduce domWrapper
+ // back to the same length:
+ domWrapper->InternalBaseValListWillChangeLengthTo(mBaseVal.Length());
+ } else {
+ mIsAttrSet = true;
+ mHadTransformBeforeLastBaseValChange = hadTransform;
+ }
+ return rv;
+}
+
+void
+nsSVGAnimatedTransformList::ClearBaseValue()
+{
+ mHadTransformBeforeLastBaseValChange = HasTransform();
+
+ SVGAnimatedTransformList *domWrapper =
+ SVGAnimatedTransformList::GetDOMWrapperIfExists(this);
+ if (domWrapper) {
+ // We must send this notification *before* changing mBaseVal! (See above.)
+ domWrapper->InternalBaseValListWillChangeLengthTo(0);
+ }
+ mBaseVal.Clear();
+ mIsAttrSet = false;
+ // Caller notifies
+}
+
+nsresult
+nsSVGAnimatedTransformList::SetAnimValue(const SVGTransformList& aValue,
+ nsSVGElement *aElement)
+{
+ bool prevSet = HasTransform() || aElement->GetAnimateMotionTransform();
+ SVGAnimatedTransformList *domWrapper =
+ SVGAnimatedTransformList::GetDOMWrapperIfExists(this);
+ if (domWrapper) {
+ // A new animation may totally change the number of items in the animVal
+ // list, replacing what was essentially a mirror of the baseVal list, or
+ // else replacing and overriding an existing animation. When this happens
+ // we must try and keep our animVal's DOM wrapper in sync (see the comment
+ // in SVGAnimatedTransformList::InternalBaseValListWillChangeLengthTo).
+ //
+ // It's not possible for us to reliably distinguish between calls to this
+ // method that are setting a new sample for an existing animation, and
+ // calls that are setting the first sample of an animation that will
+ // override an existing animation. Happily it's cheap to just blindly
+ // notify our animVal's DOM wrapper of its internal counterpart's new value
+ // each time this method is called, so that's what we do.
+ //
+ // Note that we must send this notification *before* setting or changing
+ // mAnimVal! (See the comment in SetBaseValueString above.)
+ //
+ domWrapper->InternalAnimValListWillChangeLengthTo(aValue.Length());
+ }
+ if (!mAnimVal) {
+ mAnimVal = new SVGTransformList();
+ }
+ nsresult rv = mAnimVal->CopyFrom(aValue);
+ if (NS_FAILED(rv)) {
+ // OOM. We clear the animation, and, importantly, ClearAnimValue() ensures
+ // that mAnimVal and its DOM wrapper (if any) will have the same length!
+ ClearAnimValue(aElement);
+ return rv;
+ }
+ int32_t modType;
+ if(prevSet) {
+ modType = nsIDOMMutationEvent::MODIFICATION;
+ } else {
+ modType = nsIDOMMutationEvent::ADDITION;
+ }
+ aElement->DidAnimateTransformList(modType);
+ return NS_OK;
+}
+
+void
+nsSVGAnimatedTransformList::ClearAnimValue(nsSVGElement *aElement)
+{
+ SVGAnimatedTransformList *domWrapper =
+ SVGAnimatedTransformList::GetDOMWrapperIfExists(this);
+ if (domWrapper) {
+ // When all animation ends, animVal simply mirrors baseVal, which may have
+ // a different number of items to the last active animated value. We must
+ // keep the length of our animVal's DOM wrapper list in sync, and again we
+ // must do that before touching mAnimVal. See comments above.
+ //
+ domWrapper->InternalAnimValListWillChangeLengthTo(mBaseVal.Length());
+ }
+ mAnimVal = nullptr;
+ int32_t modType;
+ if (HasTransform() || aElement->GetAnimateMotionTransform()) {
+ modType = nsIDOMMutationEvent::MODIFICATION;
+ } else {
+ modType = nsIDOMMutationEvent::REMOVAL;
+ }
+ aElement->DidAnimateTransformList(modType);
+}
+
+bool
+nsSVGAnimatedTransformList::IsExplicitlySet() const
+{
+ // Like other methods of this name, we need to know when a transform value has
+ // been explicitly set.
+ //
+ // There are three ways an animated list can become set:
+ // 1) Markup -- we set mIsAttrSet to true on any successful call to
+ // SetBaseValueString and clear it on ClearBaseValue (as called by
+ // nsSVGElement::UnsetAttr or a failed nsSVGElement::ParseAttribute)
+ // 2) DOM call -- simply fetching the baseVal doesn't mean the transform value
+ // has been set. It is set if that baseVal has one or more transforms in
+ // the list.
+ // 3) Animation -- which will cause the mAnimVal member to be allocated
+ return mIsAttrSet || !mBaseVal.IsEmpty() || mAnimVal;
+}
+
+nsISMILAttr*
+nsSVGAnimatedTransformList::ToSMILAttr(nsSVGElement* aSVGElement)
+{
+ return new SMILAnimatedTransformList(this, aSVGElement);
+}
+
+nsresult
+nsSVGAnimatedTransformList::SMILAnimatedTransformList::ValueFromString(
+ const nsAString& aStr,
+ const dom::SVGAnimationElement* aSrcElement,
+ nsSMILValue& aValue,
+ bool& aPreventCachingOfSandwich) const
+{
+ NS_ENSURE_TRUE(aSrcElement, NS_ERROR_FAILURE);
+ MOZ_ASSERT(aValue.IsNull(),
+ "aValue should have been cleared before calling ValueFromString");
+
+ const nsAttrValue* typeAttr = aSrcElement->GetAnimAttr(nsGkAtoms::type);
+ const nsIAtom* transformType = nsGkAtoms::translate; // default val
+ if (typeAttr) {
+ if (typeAttr->Type() != nsAttrValue::eAtom) {
+ // Recognized values of |type| are parsed as an atom -- so if we have
+ // something other than an atom, then we know already our |type| is
+ // invalid.
+ return NS_ERROR_FAILURE;
+ }
+ transformType = typeAttr->GetAtomValue();
+ }
+
+ ParseValue(aStr, transformType, aValue);
+ aPreventCachingOfSandwich = false;
+ return aValue.IsNull() ? NS_ERROR_FAILURE : NS_OK;
+}
+
+void
+nsSVGAnimatedTransformList::SMILAnimatedTransformList::ParseValue(
+ const nsAString& aSpec,
+ const nsIAtom* aTransformType,
+ nsSMILValue& aResult)
+{
+ MOZ_ASSERT(aResult.IsNull(), "Unexpected type for SMIL value");
+
+ static_assert(SVGTransformSMILData::NUM_SIMPLE_PARAMS == 3,
+ "nsSVGSMILTransform constructor should be expecting array "
+ "with 3 params");
+
+ float params[3] = { 0.f };
+ int32_t numParsed = ParseParameterList(aSpec, params, 3);
+ uint16_t transformType;
+
+ if (aTransformType == nsGkAtoms::translate) {
+ // tx [ty=0]
+ if (numParsed != 1 && numParsed != 2)
+ return;
+ transformType = SVG_TRANSFORM_TRANSLATE;
+ } else if (aTransformType == nsGkAtoms::scale) {
+ // sx [sy=sx]
+ if (numParsed != 1 && numParsed != 2)
+ return;
+ if (numParsed == 1) {
+ params[1] = params[0];
+ }
+ transformType = SVG_TRANSFORM_SCALE;
+ } else if (aTransformType == nsGkAtoms::rotate) {
+ // r [cx=0 cy=0]
+ if (numParsed != 1 && numParsed != 3)
+ return;
+ transformType = SVG_TRANSFORM_ROTATE;
+ } else if (aTransformType == nsGkAtoms::skewX) {
+ // x-angle
+ if (numParsed != 1)
+ return;
+ transformType = SVG_TRANSFORM_SKEWX;
+ } else if (aTransformType == nsGkAtoms::skewY) {
+ // y-angle
+ if (numParsed != 1)
+ return;
+ transformType = SVG_TRANSFORM_SKEWY;
+ } else {
+ return;
+ }
+
+ nsSMILValue val(SVGTransformListSMILType::Singleton());
+ SVGTransformSMILData transform(transformType, params);
+ if (NS_FAILED(SVGTransformListSMILType::AppendTransform(transform, val))) {
+ return; // OOM
+ }
+
+ // Success! Populate our outparam with parsed value.
+ aResult = Move(val);
+}
+
+int32_t
+nsSVGAnimatedTransformList::SMILAnimatedTransformList::ParseParameterList(
+ const nsAString& aSpec,
+ float* aVars,
+ int32_t aNVars)
+{
+ nsCharSeparatedTokenizerTemplate<IsSVGWhitespace>
+ tokenizer(aSpec, ',', nsCharSeparatedTokenizer::SEPARATOR_OPTIONAL);
+
+ int numArgsFound = 0;
+
+ while (tokenizer.hasMoreTokens()) {
+ float f;
+ if (!SVGContentUtils::ParseNumber(tokenizer.nextToken(), f)) {
+ return -1;
+ }
+ if (numArgsFound < aNVars) {
+ aVars[numArgsFound] = f;
+ }
+ numArgsFound++;
+ }
+ return numArgsFound;
+}
+
+nsSMILValue
+nsSVGAnimatedTransformList::SMILAnimatedTransformList::GetBaseValue() const
+{
+ // To benefit from Return Value Optimization and avoid copy constructor calls
+ // due to our use of return-by-value, we must return the exact same object
+ // from ALL return points. This function must only return THIS variable:
+ nsSMILValue val(SVGTransformListSMILType::Singleton());
+ if (!SVGTransformListSMILType::AppendTransforms(mVal->mBaseVal, val)) {
+ val = nsSMILValue();
+ }
+
+ return val;
+}
+
+nsresult
+nsSVGAnimatedTransformList::SMILAnimatedTransformList::SetAnimValue(
+ const nsSMILValue& aNewAnimValue)
+{
+ MOZ_ASSERT(aNewAnimValue.mType == SVGTransformListSMILType::Singleton(),
+ "Unexpected type to assign animated value");
+ SVGTransformList animVal;
+ if (!SVGTransformListSMILType::GetTransforms(aNewAnimValue,
+ animVal.mItems)) {
+ return NS_ERROR_FAILURE;
+ }
+
+ return mVal->SetAnimValue(animVal, mElement);
+}
+
+void
+nsSVGAnimatedTransformList::SMILAnimatedTransformList::ClearAnimValue()
+{
+ if (mVal->mAnimVal) {
+ mVal->ClearAnimValue(mElement);
+ }
+}
+
+} // namespace mozilla