зеркало из https://github.com/mozilla/gecko-dev.git
450 строки
15 KiB
C++
450 строки
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 "nsError.h"
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#include "nsMathUtils.h"
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#include "SVGAnimatedLength.h"
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#include "SVGAnimatedLengthList.h"
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#include "SVGAttrTearoffTable.h"
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#include "SVGLength.h"
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#include "mozilla/dom/SVGElement.h"
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#include "mozilla/dom/SVGLengthBinding.h"
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#include "mozilla/FloatingPoint.h"
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// See the architecture comment in DOMSVGAnimatedLengthList.h.
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namespace mozilla {
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namespace dom {
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static SVGAttrTearoffTable<SVGAnimatedLength, DOMSVGLength>
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sBaseSVGLengthTearOffTable, 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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NS_IMPL_CYCLE_COLLECTION_UNLINK(mOwner)
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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(mOwner)
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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_COLLECTION_ROOT_NATIVE(DOMSVGLength, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(DOMSVGLength, Release)
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DOMSVGLength::DOMSVGLength(DOMSVGLengthList* aList, uint8_t aAttrEnum,
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uint32_t aListIndex, bool aIsAnimValItem)
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: mOwner(aList),
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mListIndex(aListIndex),
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mAttrEnum(aAttrEnum),
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mIsAnimValItem(aIsAnimValItem),
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mUnit(SVGLength_Binding::SVG_LENGTHTYPE_NUMBER) {
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MOZ_ASSERT(aList, "bad arg");
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MOZ_ASSERT(mAttrEnum == aAttrEnum, "bitfield too small");
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MOZ_ASSERT(aListIndex <= MaxListIndex(), "list index too large");
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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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: mOwner(nullptr),
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mListIndex(0),
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mAttrEnum(0),
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mIsAnimValItem(false),
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mUnit(SVGLength_Binding::SVG_LENGTHTYPE_NUMBER) {}
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DOMSVGLength::DOMSVGLength(SVGAnimatedLength* aVal, SVGElement* aSVGElement,
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bool aAnimVal)
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: mOwner(aSVGElement),
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mListIndex(0),
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mAttrEnum(aVal->mAttrEnum),
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mIsAnimValItem(aAnimVal),
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mUnit(SVGLength_Binding::SVG_LENGTHTYPE_NUMBER) {
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MOZ_ASSERT(aVal, "bad arg");
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MOZ_ASSERT(mAttrEnum == aVal->mAttrEnum, "bitfield too small");
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}
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void DOMSVGLength::CleanupWeakRefs() {
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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 (nsCOMPtr<DOMSVGLengthList> lengthList = do_QueryInterface(mOwner)) {
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MOZ_ASSERT(lengthList->mItems[mListIndex] == this,
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"Clearing out the wrong list index...?");
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lengthList->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 (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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auto& table = mIsAnimValItem ? sAnimSVGLengthTearOffTable
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: sBaseSVGLengthTearOffTable;
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table.RemoveTearoff(svg->GetAnimatedLength(mAttrEnum));
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}
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}
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already_AddRefed<DOMSVGLength> DOMSVGLength::GetTearOff(SVGAnimatedLength* aVal,
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SVGElement* aSVGElement,
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bool aAnimVal) {
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auto& table =
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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* DOMSVGLength::Copy() {
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NS_ASSERTION(HasOwner(), "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 (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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SVGAnimatedLength* length = svg->GetAnimatedLength(mAttrEnum);
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unit = length->GetSpecifiedUnitType();
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value = mIsAnimValItem ? length->GetAnimValInSpecifiedUnits()
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: length->GetBaseValInSpecifiedUnits();
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} else {
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const 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, IgnoreErrors());
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return copy;
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}
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uint16_t DOMSVGLength::UnitType() {
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if (mIsAnimValItem) {
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Element()->FlushAnimations();
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}
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if (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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return svg->GetAnimatedLength(mAttrEnum)->GetSpecifiedUnitType();
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}
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return HasOwner() ? InternalItem().GetUnit() : mUnit;
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}
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float DOMSVGLength::GetValue(ErrorResult& aRv) {
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if (mIsAnimValItem) {
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Element()->FlushAnimations(); // May make HasOwner() == false
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}
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if (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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SVGAnimatedLength* length = svg->GetAnimatedLength(mAttrEnum);
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return mIsAnimValItem ? length->GetAnimValue(svg)
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: length->GetBaseValue(svg);
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}
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if (nsCOMPtr<DOMSVGLengthList> lengthList = do_QueryInterface(mOwner)) {
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float value = InternalItem().GetValueInUserUnits(lengthList->Element(),
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lengthList->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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}
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float unitToPx;
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if (UserSpaceMetrics::ResolveAbsoluteUnit(mUnit, unitToPx)) {
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return mValue * unitToPx;
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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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void DOMSVGLength::SetValue(float aUserUnitValue, ErrorResult& aRv) {
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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 (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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aRv = svg->GetAnimatedLength(mAttrEnum)->SetBaseValue(aUserUnitValue, svg,
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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 (nsCOMPtr<DOMSVGLengthList> lengthList = do_QueryInterface(mOwner)) {
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SVGLength& internalItem = InternalItem();
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if (internalItem.GetValueInUserUnits(
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lengthList->Element(), lengthList->Axis()) == aUserUnitValue) {
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return;
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}
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float uuPerUnit = internalItem.GetUserUnitsPerUnit(lengthList->Element(),
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lengthList->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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AutoChangeLengthListNotifier 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 == SVGLength_Binding::SVG_LENGTHTYPE_NUMBER ||
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mUnit == SVGLength_Binding::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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float DOMSVGLength::ValueInSpecifiedUnits() {
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if (mIsAnimValItem) {
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Element()->FlushAnimations(); // May make HasOwner() == false
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}
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if (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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SVGAnimatedLength* length = svg->GetAnimatedLength(mAttrEnum);
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return mIsAnimValItem ? length->GetAnimValInSpecifiedUnits()
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: length->GetBaseValInSpecifiedUnits();
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}
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return HasOwner() ? InternalItem().GetValueInCurrentUnits() : mValue;
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}
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void DOMSVGLength::SetValueInSpecifiedUnits(float aValue, ErrorResult& aRv) {
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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 (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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svg->GetAnimatedLength(mAttrEnum)->SetBaseValueInSpecifiedUnits(aValue, svg,
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true);
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return;
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}
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if (HasOwner()) {
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SVGLength& internalItem = InternalItem();
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if (internalItem.GetValueInCurrentUnits() == aValue) {
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return;
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}
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AutoChangeLengthListNotifier 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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void DOMSVGLength::SetValueAsString(const nsAString& aValue, ErrorResult& aRv) {
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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 (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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aRv = svg->GetAnimatedLength(mAttrEnum)->SetBaseValueString(aValue, svg,
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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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SVGLength& internalItem = InternalItem();
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if (internalItem == value) {
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return;
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}
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AutoChangeLengthListNotifier 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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void DOMSVGLength::GetValueAsString(nsAString& aValue) {
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if (mIsAnimValItem) {
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Element()->FlushAnimations(); // May make HasOwner() == false
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}
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if (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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SVGAnimatedLength* length = svg->GetAnimatedLength(mAttrEnum);
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if (mIsAnimValItem) {
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length->GetAnimValueString(aValue);
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} else {
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length->GetBaseValueString(aValue);
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}
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return;
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}
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if (HasOwner()) {
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InternalItem().GetValueAsString(aValue);
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return;
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}
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SVGLength(mValue, mUnit).GetValueAsString(aValue);
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}
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void DOMSVGLength::NewValueSpecifiedUnits(uint16_t aUnit, float aValue,
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ErrorResult& aRv) {
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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 (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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svg->GetAnimatedLength(mAttrEnum)->NewValueSpecifiedUnits(aUnit, aValue,
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svg);
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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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SVGLength& internalItem = InternalItem();
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if (internalItem == SVGLength(aValue, aUnit)) {
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return;
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}
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AutoChangeLengthListNotifier 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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void DOMSVGLength::ConvertToSpecifiedUnits(uint16_t aUnit, ErrorResult& aRv) {
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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 (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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svg->GetAnimatedLength(mAttrEnum)->ConvertToSpecifiedUnits(aUnit, svg);
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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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float val;
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if (nsCOMPtr<DOMSVGLengthList> lengthList = do_QueryInterface(mOwner)) {
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SVGLength& length = InternalItem();
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if (length.GetUnit() == aUnit) {
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return;
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}
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val = length.GetValueInSpecifiedUnit(aUnit, lengthList->Element(),
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lengthList->Axis());
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} else {
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val = SVGLength(mValue, mUnit).GetValueInSpecifiedUnit(aUnit, nullptr, 0);
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}
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if (IsFinite(val)) {
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if (HasOwner()) {
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AutoChangeLengthListNotifier notifier(this);
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InternalItem().SetValueAndUnit(val, aUnit);
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} else {
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mValue = val;
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mUnit = aUnit;
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}
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return;
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}
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// else [SVGWG issue] Can't convert unit
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// ReportToConsole
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aRv.Throw(NS_ERROR_FAILURE);
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}
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JSObject* DOMSVGLength::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return SVGLength_Binding::Wrap(aCx, this, aGivenProto);
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}
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void DOMSVGLength::InsertingIntoList(DOMSVGLengthList* aList, uint8_t aAttrEnum,
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uint32_t aListIndex, bool aIsAnimValItem) {
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NS_ASSERTION(!HasOwner(), "Inserting item that is already in a list");
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mOwner = aList;
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mAttrEnum = aAttrEnum;
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mListIndex = aListIndex;
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mIsAnimValItem = aIsAnimValItem;
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MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGLength!");
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}
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void DOMSVGLength::RemovingFromList() {
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mValue = InternalItem().GetValueInCurrentUnits();
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mUnit = InternalItem().GetUnit();
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mOwner = nullptr;
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mIsAnimValItem = false;
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}
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SVGLength DOMSVGLength::ToSVGLength() {
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if (nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner)) {
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SVGAnimatedLength* length = svg->GetAnimatedLength(mAttrEnum);
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return SVGLength(mIsAnimValItem ? length->GetAnimValInSpecifiedUnits()
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: length->GetBaseValInSpecifiedUnits(),
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length->GetSpecifiedUnitType());
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}
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return HasOwner() ? InternalItem() : SVGLength(mValue, mUnit);
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}
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bool DOMSVGLength::IsAnimating() const {
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if (nsCOMPtr<DOMSVGLengthList> lengthList = do_QueryInterface(mOwner)) {
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return lengthList->IsAnimating();
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}
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nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner);
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return svg && svg->GetAnimatedLength(mAttrEnum)->IsAnimated();
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}
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SVGElement* DOMSVGLength::Element() {
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if (nsCOMPtr<DOMSVGLengthList> lengthList = do_QueryInterface(mOwner)) {
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return lengthList->Element();
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}
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nsCOMPtr<SVGElement> svg = do_QueryInterface(mOwner);
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return svg;
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}
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SVGLength& DOMSVGLength::InternalItem() {
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nsCOMPtr<DOMSVGLengthList> lengthList = do_QueryInterface(mOwner);
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SVGAnimatedLengthList* alist =
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lengthList->Element()->GetAnimatedLengthList(mAttrEnum);
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return mIsAnimValItem && alist->mAnimVal ? (*alist->mAnimVal)[mListIndex]
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: alist->mBaseVal[mListIndex];
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}
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#ifdef DEBUG
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bool DOMSVGLength::IndexIsValid() {
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nsCOMPtr<DOMSVGLengthList> lengthList = do_QueryInterface(mOwner);
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SVGAnimatedLengthList* alist =
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lengthList->Element()->GetAnimatedLengthList(mAttrEnum);
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return (mIsAnimValItem && mListIndex < alist->GetAnimValue().Length()) ||
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(!mIsAnimValItem && mListIndex < alist->GetBaseValue().Length());
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}
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#endif
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} // namespace dom
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} // namespace mozilla
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