mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-08-15 02:29:04 +00:00
593 lines
15 KiB
C++
593 lines
15 KiB
C++
/* -*- 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 "DOMSVGLength.h"
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#include "DOMSVGLengthList.h"
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#include "DOMSVGAnimatedLengthList.h"
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#include "SVGLength.h"
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#include "SVGAnimatedLengthList.h"
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#include "nsSVGElement.h"
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#include "nsSVGLength2.h"
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#include "nsIDOMSVGLength.h"
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#include "nsError.h"
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#include "nsMathUtils.h"
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#include "mozilla/dom/SVGLengthBinding.h"
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#include "mozilla/FloatingPoint.h"
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#include "nsSVGAttrTearoffTable.h"
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// See the architecture comment in DOMSVGAnimatedLengthList.h.
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namespace mozilla {
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static nsSVGAttrTearoffTable<nsSVGLength2, DOMSVGLength>
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sBaseSVGLengthTearOffTable,
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sAnimSVGLengthTearOffTable;
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// We could use NS_IMPL_CYCLE_COLLECTION(, except that in Unlink() we need to
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// clear our list's weak ref to us to be safe. (The other option would be to
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// not unlink and rely on the breaking of the other edges in the cycle, as
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// NS_SVG_VAL_IMPL_CYCLE_COLLECTION does.)
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NS_IMPL_CYCLE_COLLECTION_CLASS(DOMSVGLength)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMSVGLength)
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tmp->CleanupWeakRefs();
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tmp->mVal = nullptr; // (owned by mSVGElement, which we drop our ref to here)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mList)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mSVGElement)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMSVGLength)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mList)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSVGElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(DOMSVGLength)
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NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGLength)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGLength)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGLength)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(mozilla::DOMSVGLength) // pseudo-interface
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NS_INTERFACE_MAP_ENTRY(nsIDOMSVGLength)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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//----------------------------------------------------------------------
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// Helper class: AutoChangeLengthNotifier
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// Stack-based helper class to pair calls to WillChangeLengthList and
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// DidChangeLengthList.
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class MOZ_RAII AutoChangeLengthNotifier
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{
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public:
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explicit AutoChangeLengthNotifier(DOMSVGLength* aLength MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: mLength(aLength)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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MOZ_ASSERT(mLength, "Expecting non-null length");
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MOZ_ASSERT(mLength->HasOwner(),
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"Expecting list to have an owner for notification");
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mEmptyOrOldValue =
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mLength->Element()->WillChangeLengthList(mLength->mAttrEnum);
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}
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~AutoChangeLengthNotifier()
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{
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mLength->Element()->DidChangeLengthList(mLength->mAttrEnum,
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mEmptyOrOldValue);
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if (mLength->mList->IsAnimating()) {
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mLength->Element()->AnimationNeedsResample();
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}
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}
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private:
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DOMSVGLength* const mLength;
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nsAttrValue mEmptyOrOldValue;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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DOMSVGLength::DOMSVGLength(DOMSVGLengthList *aList,
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uint8_t aAttrEnum,
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uint32_t aListIndex,
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bool aIsAnimValItem)
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: mList(aList)
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, mListIndex(aListIndex)
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, mAttrEnum(aAttrEnum)
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, mIsAnimValItem(aIsAnimValItem)
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, mUnit(nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER)
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, mValue(0.0f)
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, mVal(nullptr)
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{
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// These shifts are in sync with the members in the header.
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MOZ_ASSERT(aList &&
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aAttrEnum < (1 << 4) &&
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aListIndex <= MaxListIndex(),
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"bad arg");
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MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGNumber!");
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}
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DOMSVGLength::DOMSVGLength()
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: mList(nullptr)
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, mListIndex(0)
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, mAttrEnum(0)
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, mIsAnimValItem(false)
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, mUnit(nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER)
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, mValue(0.0f)
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, mVal(nullptr)
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{
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}
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DOMSVGLength::DOMSVGLength(nsSVGLength2* aVal, nsSVGElement* aSVGElement,
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bool aAnimVal)
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: mList(nullptr)
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, mListIndex(0)
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, mAttrEnum(0)
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, mIsAnimValItem(aAnimVal)
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, mUnit(nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER)
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, mValue(0.0f)
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, mVal(aVal)
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, mSVGElement(aSVGElement)
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{
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}
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void
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DOMSVGLength::CleanupWeakRefs()
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{
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// Our mList's weak ref to us must be nulled out when we die (or when we're
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// cycle collected), so we that don't leave behind a pointer to
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// free / soon-to-be-free memory.
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if (mList) {
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MOZ_ASSERT(mList->mItems[mListIndex] == this,
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"Clearing out the wrong list index...?");
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mList->mItems[mListIndex] = nullptr;
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}
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// Similarly, we must update the tearoff table to remove its (non-owning)
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// pointer to mVal.
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if (mVal) {
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auto& table = mIsAnimValItem ?
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sAnimSVGLengthTearOffTable : sBaseSVGLengthTearOffTable;
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table.RemoveTearoff(mVal);
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}
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}
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DOMSVGLength::~DOMSVGLength()
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{
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CleanupWeakRefs();
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}
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already_AddRefed<DOMSVGLength>
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DOMSVGLength::GetTearOff(nsSVGLength2* aVal, nsSVGElement* aSVGElement,
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bool aAnimVal)
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{
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auto& table = aAnimVal ? sAnimSVGLengthTearOffTable : sBaseSVGLengthTearOffTable;
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RefPtr<DOMSVGLength> domLength = table.GetTearoff(aVal);
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if (!domLength) {
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domLength = new DOMSVGLength(aVal, aSVGElement, aAnimVal);
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table.AddTearoff(aVal, domLength);
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}
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return domLength.forget();
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}
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DOMSVGLength*
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DOMSVGLength::Copy()
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{
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NS_ASSERTION(HasOwner() || IsReflectingAttribute(), "unexpected caller");
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DOMSVGLength *copy = new DOMSVGLength();
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uint16_t unit;
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float value;
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if (mVal) {
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unit = mVal->mSpecifiedUnitType;
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value = mIsAnimValItem ? mVal->mAnimVal : mVal->mBaseVal;
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} else {
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SVGLength &length = InternalItem();
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unit = length.GetUnit();
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value = length.GetValueInCurrentUnits();
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}
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copy->NewValueSpecifiedUnits(unit, value);
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return copy;
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}
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uint16_t
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DOMSVGLength::UnitType()
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{
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if (mVal) {
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if (mIsAnimValItem) {
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mSVGElement->FlushAnimations();
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}
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return mVal->mSpecifiedUnitType;
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}
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if (mIsAnimValItem && HasOwner()) {
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Element()->FlushAnimations(); // May make HasOwner() == false
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}
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return HasOwner() ? InternalItem().GetUnit() : mUnit;
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}
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NS_IMETHODIMP
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DOMSVGLength::GetUnitType(uint16_t* aUnit)
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{
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*aUnit = UnitType();
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return NS_OK;
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}
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float
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DOMSVGLength::GetValue(ErrorResult& aRv)
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{
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if (mVal) {
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if (mIsAnimValItem) {
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mSVGElement->FlushAnimations();
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return mVal->GetAnimValue(mSVGElement);
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}
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return mVal->GetBaseValue(mSVGElement);
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}
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if (mIsAnimValItem && HasOwner()) {
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Element()->FlushAnimations(); // May make HasOwner() == false
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}
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if (HasOwner()) {
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float value = InternalItem().GetValueInUserUnits(Element(), Axis());
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if (!IsFinite(value)) {
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aRv.Throw(NS_ERROR_FAILURE);
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}
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return value;
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} else if (mUnit == nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER ||
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mUnit == nsIDOMSVGLength::SVG_LENGTHTYPE_PX) {
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return mValue;
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}
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// else [SVGWG issue] Can't convert this length's value to user units
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// ReportToConsole
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aRv.Throw(NS_ERROR_FAILURE);
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return 0.0f;
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}
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NS_IMETHODIMP
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DOMSVGLength::GetValue(float* aValue)
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{
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ErrorResult rv;
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*aValue = GetValue(rv);
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return rv.StealNSResult();
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}
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void
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DOMSVGLength::SetValue(float aUserUnitValue, ErrorResult& aRv)
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{
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if (mIsAnimValItem) {
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return;
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}
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if (mVal) {
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mVal->SetBaseValue(aUserUnitValue, mSVGElement, true);
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return;
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}
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// Although the value passed in is in user units, this method does not turn
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// this length into a user unit length. Instead it converts the user unit
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// value to this length's current unit and sets that, leaving this length's
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// unit as it is.
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if (HasOwner()) {
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if (InternalItem().GetValueInUserUnits(Element(), Axis()) ==
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aUserUnitValue) {
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return;
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}
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float uuPerUnit = InternalItem().GetUserUnitsPerUnit(Element(), Axis());
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if (uuPerUnit > 0) {
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float newValue = aUserUnitValue / uuPerUnit;
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if (IsFinite(newValue)) {
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AutoChangeLengthNotifier notifier(this);
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InternalItem().SetValueAndUnit(newValue, InternalItem().GetUnit());
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return;
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}
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}
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} else if (mUnit == nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER ||
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mUnit == nsIDOMSVGLength::SVG_LENGTHTYPE_PX) {
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mValue = aUserUnitValue;
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return;
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}
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// else [SVGWG issue] Can't convert user unit value to this length's unit
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// ReportToConsole
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aRv.Throw(NS_ERROR_FAILURE);
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}
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NS_IMETHODIMP
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DOMSVGLength::SetValue(float aUserUnitValue)
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{
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if (!IsFinite(aUserUnitValue)) {
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return NS_ERROR_ILLEGAL_VALUE;
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}
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ErrorResult rv;
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SetValue(aUserUnitValue, rv);
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return rv.StealNSResult();
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}
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float
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DOMSVGLength::ValueInSpecifiedUnits()
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{
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if (mVal) {
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if (mIsAnimValItem) {
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mSVGElement->FlushAnimations();
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return mVal->mAnimVal;
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}
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return mVal->mBaseVal;
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}
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if (mIsAnimValItem && HasOwner()) {
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Element()->FlushAnimations(); // May make HasOwner() == false
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}
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return HasOwner() ? InternalItem().GetValueInCurrentUnits() : mValue;
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}
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NS_IMETHODIMP
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DOMSVGLength::GetValueInSpecifiedUnits(float* aValue)
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{
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*aValue = ValueInSpecifiedUnits();
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return NS_OK;
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}
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void
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DOMSVGLength::SetValueInSpecifiedUnits(float aValue, ErrorResult& aRv)
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{
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if (mIsAnimValItem) {
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return;
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}
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if (mVal) {
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mVal->SetBaseValueInSpecifiedUnits(aValue, mSVGElement, true);
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return;
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}
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if (HasOwner()) {
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if (InternalItem().GetValueInCurrentUnits() == aValue) {
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return;
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}
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AutoChangeLengthNotifier notifier(this);
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InternalItem().SetValueInCurrentUnits(aValue);
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return;
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}
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mValue = aValue;
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}
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NS_IMETHODIMP
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DOMSVGLength::SetValueInSpecifiedUnits(float aValue)
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{
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if (!IsFinite(aValue)) {
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return NS_ERROR_ILLEGAL_VALUE;
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}
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ErrorResult rv;
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SetValueInSpecifiedUnits(aValue, rv);
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return rv.StealNSResult();
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}
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void
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DOMSVGLength::SetValueAsString(const nsAString& aValue, ErrorResult& aRv)
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{
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if (mIsAnimValItem) {
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return;
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}
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if (mVal) {
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aRv = mVal->SetBaseValueString(aValue, mSVGElement, true);
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return;
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}
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SVGLength value;
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if (!value.SetValueFromString(aValue)) {
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aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
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return;
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}
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if (HasOwner()) {
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if (InternalItem() == value) {
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return;
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}
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AutoChangeLengthNotifier notifier(this);
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InternalItem() = value;
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return;
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}
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mValue = value.GetValueInCurrentUnits();
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mUnit = value.GetUnit();
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}
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NS_IMETHODIMP
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DOMSVGLength::SetValueAsString(const nsAString& aValue)
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{
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ErrorResult rv;
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SetValueAsString(aValue, rv);
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return rv.StealNSResult();
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}
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NS_IMETHODIMP
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DOMSVGLength::GetValueAsString(nsAString& aValue)
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{
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if (mVal) {
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if (mIsAnimValItem) {
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mSVGElement->FlushAnimations();
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mVal->GetAnimValueString(aValue);
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} else {
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mVal->GetBaseValueString(aValue);
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}
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return NS_OK;
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}
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if (mIsAnimValItem && HasOwner()) {
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Element()->FlushAnimations(); // May make HasOwner() == false
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}
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if (HasOwner()) {
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InternalItem().GetValueAsString(aValue);
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return NS_OK;
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}
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SVGLength(mValue, mUnit).GetValueAsString(aValue);
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return NS_OK;
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}
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void
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DOMSVGLength::NewValueSpecifiedUnits(uint16_t aUnit, float aValue,
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ErrorResult& aRv)
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{
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if (mIsAnimValItem) {
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return;
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}
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if (mVal) {
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mVal->NewValueSpecifiedUnits(aUnit, aValue, mSVGElement);
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return;
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}
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if (!SVGLength::IsValidUnitType(aUnit)) {
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aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
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return;
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}
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if (HasOwner()) {
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if (InternalItem().GetUnit() == aUnit &&
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InternalItem().GetValueInCurrentUnits() == aValue) {
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return;
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}
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AutoChangeLengthNotifier notifier(this);
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InternalItem().SetValueAndUnit(aValue, uint8_t(aUnit));
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return;
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}
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mUnit = uint8_t(aUnit);
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mValue = aValue;
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}
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NS_IMETHODIMP
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DOMSVGLength::NewValueSpecifiedUnits(uint16_t aUnit, float aValue)
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{
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if (!IsFinite(aValue)) {
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return NS_ERROR_ILLEGAL_VALUE;
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}
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ErrorResult rv;
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NewValueSpecifiedUnits(aUnit, aValue, rv);
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return rv.StealNSResult();
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}
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void
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DOMSVGLength::ConvertToSpecifiedUnits(uint16_t aUnit, ErrorResult& aRv)
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{
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if (mIsAnimValItem) {
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return;
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}
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if (mVal) {
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mVal->ConvertToSpecifiedUnits(aUnit, mSVGElement);
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return;
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}
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if (!SVGLength::IsValidUnitType(aUnit)) {
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aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
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return;
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}
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if (HasOwner()) {
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if (InternalItem().GetUnit() == aUnit) {
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return;
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}
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float val = InternalItem().GetValueInSpecifiedUnit(
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aUnit, Element(), Axis());
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if (IsFinite(val)) {
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AutoChangeLengthNotifier notifier(this);
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InternalItem().SetValueAndUnit(val, aUnit);
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return;
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}
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} else {
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SVGLength len(mValue, mUnit);
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float val = len.GetValueInSpecifiedUnit(aUnit, nullptr, 0);
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if (IsFinite(val)) {
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mValue = val;
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mUnit = aUnit;
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return;
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}
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}
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// else [SVGWG issue] Can't convert unit
|
|
// ReportToConsole
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
DOMSVGLength::ConvertToSpecifiedUnits(uint16_t aUnit)
|
|
{
|
|
ErrorResult rv;
|
|
ConvertToSpecifiedUnits(aUnit, rv);
|
|
return rv.StealNSResult();
|
|
}
|
|
|
|
JSObject*
|
|
DOMSVGLength::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
|
|
{
|
|
return dom::SVGLengthBinding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
void
|
|
DOMSVGLength::InsertingIntoList(DOMSVGLengthList *aList,
|
|
uint8_t aAttrEnum,
|
|
uint32_t aListIndex,
|
|
bool aIsAnimValItem)
|
|
{
|
|
NS_ASSERTION(!HasOwner(), "Inserting item that is already in a list");
|
|
|
|
mList = aList;
|
|
mAttrEnum = aAttrEnum;
|
|
mListIndex = aListIndex;
|
|
mIsAnimValItem = aIsAnimValItem;
|
|
|
|
MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGLength!");
|
|
}
|
|
|
|
void
|
|
DOMSVGLength::RemovingFromList()
|
|
{
|
|
mValue = InternalItem().GetValueInCurrentUnits();
|
|
mUnit = InternalItem().GetUnit();
|
|
mList = nullptr;
|
|
mIsAnimValItem = false;
|
|
}
|
|
|
|
SVGLength
|
|
DOMSVGLength::ToSVGLength()
|
|
{
|
|
if (HasOwner()) {
|
|
return SVGLength(InternalItem().GetValueInCurrentUnits(),
|
|
InternalItem().GetUnit());
|
|
}
|
|
return SVGLength(mValue, mUnit);
|
|
}
|
|
|
|
SVGLength&
|
|
DOMSVGLength::InternalItem()
|
|
{
|
|
SVGAnimatedLengthList *alist = Element()->GetAnimatedLengthList(mAttrEnum);
|
|
return mIsAnimValItem && alist->mAnimVal ?
|
|
(*alist->mAnimVal)[mListIndex] :
|
|
alist->mBaseVal[mListIndex];
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
bool
|
|
DOMSVGLength::IndexIsValid()
|
|
{
|
|
SVGAnimatedLengthList *alist = Element()->GetAnimatedLengthList(mAttrEnum);
|
|
return (mIsAnimValItem &&
|
|
mListIndex < alist->GetAnimValue().Length()) ||
|
|
(!mIsAnimValItem &&
|
|
mListIndex < alist->GetBaseValue().Length());
|
|
}
|
|
#endif
|
|
|
|
} // namespace mozilla
|