mirror of
https://github.com/classilla/tenfourfox.git
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213 lines
7.0 KiB
C++
213 lines
7.0 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "SVGAnimatedPointList.h"
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#include "DOMSVGPointList.h"
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#include "mozilla/Move.h"
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#include "nsSVGElement.h"
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#include "nsSVGAttrTearoffTable.h"
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#include "nsSMILValue.h"
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#include "SVGPointListSMILType.h"
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// See the comments in this file's header!
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namespace mozilla {
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nsresult
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SVGAnimatedPointList::SetBaseValueString(const nsAString& aValue)
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{
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SVGPointList newBaseValue;
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// The spec says that the point data is parsed and accepted up to the first
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// error encountered, so we don't return early if an error occurs. However,
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// we do want to throw any error code from setAttribute if there's a problem.
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nsresult rv = newBaseValue.SetValueFromString(aValue);
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// We must send these notifications *before* changing mBaseVal! Our baseVal's
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// DOM wrapper list may have to remove DOM items from itself, and any removed
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// DOM items need to copy their internal counterpart's values *before* we
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// change them. See the comments in
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// DOMSVGPointList::InternalListWillChangeTo().
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DOMSVGPointList *baseValWrapper =
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DOMSVGPointList::GetDOMWrapperIfExists(GetBaseValKey());
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if (baseValWrapper) {
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baseValWrapper->InternalListWillChangeTo(newBaseValue);
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}
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DOMSVGPointList* animValWrapper = nullptr;
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if (!IsAnimating()) { // DOM anim val wraps our base val too!
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animValWrapper = DOMSVGPointList::GetDOMWrapperIfExists(GetAnimValKey());
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if (animValWrapper) {
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animValWrapper->InternalListWillChangeTo(newBaseValue);
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}
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}
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// Only now may we modify mBaseVal!
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// We don't need to call DidChange* here - we're only called by
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// nsSVGElement::ParseAttribute under Element::SetAttr,
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// which takes care of notifying.
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nsresult rv2 = mBaseVal.CopyFrom(newBaseValue);
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if (NS_FAILED(rv2)) {
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// Attempting to increase mBaseVal's length failed (mBaseVal is left
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// unmodified). We MUST keep any DOM wrappers in sync:
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if (baseValWrapper) {
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baseValWrapper->InternalListWillChangeTo(mBaseVal);
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}
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if (animValWrapper) {
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animValWrapper->InternalListWillChangeTo(mBaseVal);
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}
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return rv2;
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}
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return rv;
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}
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void
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SVGAnimatedPointList::ClearBaseValue()
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{
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// We must send these notifications *before* changing mBaseVal! (See above.)
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DOMSVGPointList *baseValWrapper =
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DOMSVGPointList::GetDOMWrapperIfExists(GetBaseValKey());
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if (baseValWrapper) {
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baseValWrapper->InternalListWillChangeTo(SVGPointList());
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}
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if (!IsAnimating()) { // DOM anim val wraps our base val too!
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DOMSVGPointList *animValWrapper =
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DOMSVGPointList::GetDOMWrapperIfExists(GetAnimValKey());
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if (animValWrapper) {
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animValWrapper->InternalListWillChangeTo(SVGPointList());
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}
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}
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mBaseVal.Clear();
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// Caller notifies
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}
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nsresult
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SVGAnimatedPointList::SetAnimValue(const SVGPointList& aNewAnimValue,
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nsSVGElement *aElement)
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{
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// Note that a new animation may totally change the number of items in the
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// animVal list, either replacing what was essentially a mirror of the
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// baseVal list, or else replacing and overriding an existing animation.
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// It is not possible for us to reliably distinguish between calls to this
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// method that are setting a new sample for an existing animation (in which
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// case our list length isn't changing and we wouldn't need to notify our DOM
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// wrapper to keep its length in sync), and calls to this method that are
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// setting the first sample of a new animation that will override the base
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// value/an existing animation (in which case our length may be changing and
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// our DOM wrapper may need to be notified). Happily though, it's cheap to
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// just blindly notify our animVal's DOM wrapper of our new value each time
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// this method is called, so that's what we do.
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// We must send this notification *before* changing mAnimVal! (See above.)
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DOMSVGPointList *domWrapper =
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DOMSVGPointList::GetDOMWrapperIfExists(GetAnimValKey());
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if (domWrapper) {
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domWrapper->InternalListWillChangeTo(aNewAnimValue);
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}
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if (!mAnimVal) {
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mAnimVal = new SVGPointList();
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}
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nsresult rv = mAnimVal->CopyFrom(aNewAnimValue);
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if (NS_FAILED(rv)) {
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// OOM. We clear the animation and, importantly, ClearAnimValue() ensures
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// that mAnimVal's DOM wrapper (if any) is kept in sync!
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ClearAnimValue(aElement);
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return rv;
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}
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aElement->DidAnimatePointList();
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return NS_OK;
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}
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void
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SVGAnimatedPointList::ClearAnimValue(nsSVGElement *aElement)
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{
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// We must send these notifications *before* changing mAnimVal! (See above.)
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DOMSVGPointList *domWrapper =
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DOMSVGPointList::GetDOMWrapperIfExists(GetAnimValKey());
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if (domWrapper) {
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// When all animation ends, animVal simply mirrors baseVal, which may have
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// a different number of items to the last active animated value.
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//
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domWrapper->InternalListWillChangeTo(mBaseVal);
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}
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mAnimVal = nullptr;
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aElement->DidAnimatePointList();
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}
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nsISMILAttr*
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SVGAnimatedPointList::ToSMILAttr(nsSVGElement *aElement)
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{
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return new SMILAnimatedPointList(this, aElement);
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}
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nsresult
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SVGAnimatedPointList::
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SMILAnimatedPointList::ValueFromString(const nsAString& aStr,
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const dom::SVGAnimationElement* /*aSrcElement*/,
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nsSMILValue& aValue,
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bool& aPreventCachingOfSandwich) const
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{
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nsSMILValue val(&SVGPointListSMILType::sSingleton);
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SVGPointListAndInfo *list = static_cast<SVGPointListAndInfo*>(val.mU.mPtr);
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nsresult rv = list->SetValueFromString(aStr);
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if (NS_SUCCEEDED(rv)) {
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list->SetInfo(mElement);
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aValue = Move(val);
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}
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aPreventCachingOfSandwich = false;
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return rv;
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}
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nsSMILValue
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SVGAnimatedPointList::SMILAnimatedPointList::GetBaseValue() const
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{
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// To benefit from Return Value Optimization and avoid copy constructor calls
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// due to our use of return-by-value, we must return the exact same object
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// from ALL return points. This function must only return THIS variable:
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nsSMILValue val;
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nsSMILValue tmp(&SVGPointListSMILType::sSingleton);
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SVGPointListAndInfo *list = static_cast<SVGPointListAndInfo*>(tmp.mU.mPtr);
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nsresult rv = list->CopyFrom(mVal->mBaseVal);
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if (NS_SUCCEEDED(rv)) {
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list->SetInfo(mElement);
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Swap(val, tmp);
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}
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return val;
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}
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nsresult
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SVGAnimatedPointList::SMILAnimatedPointList::SetAnimValue(const nsSMILValue& aValue)
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{
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NS_ASSERTION(aValue.mType == &SVGPointListSMILType::sSingleton,
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"Unexpected type to assign animated value");
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if (aValue.mType == &SVGPointListSMILType::sSingleton) {
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mVal->SetAnimValue(*static_cast<SVGPointListAndInfo*>(aValue.mU.mPtr),
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mElement);
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}
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return NS_OK;
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}
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void
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SVGAnimatedPointList::SMILAnimatedPointList::ClearAnimValue()
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{
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if (mVal->mAnimVal) {
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mVal->ClearAnimValue(mElement);
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}
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}
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} // namespace mozilla
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