зеркало из https://github.com/mozilla/gecko-dev.git
1062 строки
38 KiB
C++
1062 строки
38 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 "mozilla/dom/MathMLElement.h"
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#include "base/compiler_specific.h"
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#include "mozilla/dom/BindContext.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/EventListenerManager.h"
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#include "mozilla/FontPropertyTypes.h"
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#include "mozilla/StaticPrefs_mathml.h"
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#include "mozilla/TextUtils.h"
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#include "nsGkAtoms.h"
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#include "nsIContentInlines.h"
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#include "nsITableCellLayout.h" // for MAX_COLSPAN / MAX_ROWSPAN
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#include "nsCSSValue.h"
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#include "nsMappedAttributes.h"
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#include "nsStyleConsts.h"
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#include "mozilla/dom/Document.h"
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#include "nsPresContext.h"
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#include "mozAutoDocUpdate.h"
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#include "nsIScriptError.h"
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#include "nsContentUtils.h"
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#include "nsIURI.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/MappedDeclarations.h"
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#include "mozilla/dom/MathMLElementBinding.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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//----------------------------------------------------------------------
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// nsISupports methods:
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NS_IMPL_ISUPPORTS_INHERITED(MathMLElement, MathMLElementBase, Link)
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static nsresult ReportLengthParseError(const nsString& aValue,
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Document* aDocument) {
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AutoTArray<nsString, 1> arg = {aValue};
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return nsContentUtils::ReportToConsole(
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nsIScriptError::errorFlag, "MathML"_ns, aDocument,
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nsContentUtils::eMATHML_PROPERTIES, "LengthParsingError", arg);
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}
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static nsresult ReportParseErrorNoTag(const nsString& aValue, nsAtom* aAtom,
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Document* aDocument) {
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AutoTArray<nsString, 2> argv = {aValue, nsDependentAtomString(aAtom)};
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return nsContentUtils::ReportToConsole(
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nsIScriptError::errorFlag, "MathML"_ns, aDocument,
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nsContentUtils::eMATHML_PROPERTIES, "AttributeParsingErrorNoTag", argv);
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}
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MathMLElement::MathMLElement(
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already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: MathMLElementBase(std::move(aNodeInfo)),
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ALLOW_THIS_IN_INITIALIZER_LIST(Link(this)),
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mIncrementScriptLevel(false) {}
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MathMLElement::MathMLElement(
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
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: MathMLElementBase(std::move(aNodeInfo)),
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ALLOW_THIS_IN_INITIALIZER_LIST(Link(this)),
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mIncrementScriptLevel(false) {}
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nsresult MathMLElement::BindToTree(BindContext& aContext, nsINode& aParent) {
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Link::ResetLinkState(false, Link::ElementHasHref());
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nsresult rv = MathMLElementBase::BindToTree(aContext, aParent);
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NS_ENSURE_SUCCESS(rv, rv);
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// FIXME(emilio): Probably should be composed, this uses all the other link
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// infrastructure.
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if (Document* doc = aContext.GetUncomposedDoc()) {
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doc->RegisterPendingLinkUpdate(this);
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}
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// Set the bit in the document for telemetry.
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if (Document* doc = aContext.GetComposedDoc()) {
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doc->SetMathMLEnabled();
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}
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return rv;
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}
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void MathMLElement::UnbindFromTree(bool aNullParent) {
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// Without removing the link state we risk a dangling pointer
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// in the mStyledLinks hashtable
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Link::ResetLinkState(false, Link::ElementHasHref());
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MathMLElementBase::UnbindFromTree(aNullParent);
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}
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bool MathMLElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
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const nsAString& aValue,
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nsIPrincipal* aMaybeScriptedPrincipal,
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nsAttrValue& aResult) {
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MOZ_ASSERT(IsMathMLElement());
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if (aNamespaceID == kNameSpaceID_None) {
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if (aAttribute == nsGkAtoms::color || aAttribute == nsGkAtoms::mathcolor_ ||
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aAttribute == nsGkAtoms::background ||
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aAttribute == nsGkAtoms::mathbackground_) {
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return aResult.ParseColor(aValue);
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}
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if (aAttribute == nsGkAtoms::tabindex) {
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return aResult.ParseIntValue(aValue);
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}
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if (mNodeInfo->Equals(nsGkAtoms::mtd_)) {
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if (aAttribute == nsGkAtoms::columnspan_) {
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aResult.ParseClampedNonNegativeInt(aValue, 1, 1, MAX_COLSPAN);
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return true;
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}
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if (aAttribute == nsGkAtoms::rowspan) {
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aResult.ParseClampedNonNegativeInt(aValue, 1, 0, MAX_ROWSPAN);
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return true;
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}
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}
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}
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return MathMLElementBase::ParseAttribute(aNamespaceID, aAttribute, aValue,
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aMaybeScriptedPrincipal, aResult);
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}
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// https://mathml-refresh.github.io/mathml-core/#global-attributes
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static Element::MappedAttributeEntry sGlobalAttributes[] = {
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{nsGkAtoms::dir}, {nsGkAtoms::mathbackground_},
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{nsGkAtoms::mathcolor_}, {nsGkAtoms::mathsize_},
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{nsGkAtoms::mathvariant_}, {nsGkAtoms::scriptlevel_},
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{nsGkAtoms::displaystyle_}, {nullptr}};
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static Element::MappedAttributeEntry sDeprecatedStyleAttributes[] = {
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{nsGkAtoms::background},
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{nsGkAtoms::color},
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{nsGkAtoms::fontfamily_},
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{nsGkAtoms::fontsize_},
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{nsGkAtoms::fontstyle_},
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{nsGkAtoms::fontweight_},
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{nullptr}};
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bool MathMLElement::IsAttributeMapped(const nsAtom* aAttribute) const {
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MOZ_ASSERT(IsMathMLElement());
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static const MappedAttributeEntry* const globalMap[] = {sGlobalAttributes};
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static const MappedAttributeEntry* const styleMap[] = {
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sDeprecatedStyleAttributes};
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return FindAttributeDependence(aAttribute, globalMap) ||
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(!StaticPrefs::mathml_deprecated_style_attributes_disabled() &&
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FindAttributeDependence(aAttribute, styleMap)) ||
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(!StaticPrefs::mathml_scriptminsize_attribute_disabled() &&
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aAttribute == nsGkAtoms::scriptminsize_) ||
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(!StaticPrefs::mathml_scriptsizemultiplier_attribute_disabled() &&
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aAttribute == nsGkAtoms::scriptsizemultiplier_) ||
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(mNodeInfo->Equals(nsGkAtoms::mtable_) &&
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aAttribute == nsGkAtoms::width);
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}
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nsMapRuleToAttributesFunc MathMLElement::GetAttributeMappingFunction() const {
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// It doesn't really matter what our tag is here, because only attributes
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// that satisfy IsAttributeMapped will be stored in the mapped attributes
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// list and available to the mapping function
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return &MapMathMLAttributesInto;
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}
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/* static */
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bool MathMLElement::ParseNamedSpaceValue(const nsString& aString,
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nsCSSValue& aCSSValue, uint32_t aFlags,
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const Document& aDocument) {
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if (StaticPrefs::mathml_mathspace_names_disabled()) {
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return false;
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}
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int32_t i = 0;
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// See if it is one of the 'namedspace' (ranging -7/18em, -6/18, ... 7/18em)
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if (aString.EqualsLiteral("veryverythinmathspace")) {
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i = 1;
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} else if (aString.EqualsLiteral("verythinmathspace")) {
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i = 2;
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} else if (aString.EqualsLiteral("thinmathspace")) {
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i = 3;
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} else if (aString.EqualsLiteral("mediummathspace")) {
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i = 4;
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} else if (aString.EqualsLiteral("thickmathspace")) {
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i = 5;
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} else if (aString.EqualsLiteral("verythickmathspace")) {
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i = 6;
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} else if (aString.EqualsLiteral("veryverythickmathspace")) {
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i = 7;
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} else if (aFlags & PARSE_ALLOW_NEGATIVE) {
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if (aString.EqualsLiteral("negativeveryverythinmathspace")) {
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i = -1;
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} else if (aString.EqualsLiteral("negativeverythinmathspace")) {
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i = -2;
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} else if (aString.EqualsLiteral("negativethinmathspace")) {
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i = -3;
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} else if (aString.EqualsLiteral("negativemediummathspace")) {
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i = -4;
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} else if (aString.EqualsLiteral("negativethickmathspace")) {
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i = -5;
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} else if (aString.EqualsLiteral("negativeverythickmathspace")) {
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i = -6;
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} else if (aString.EqualsLiteral("negativeveryverythickmathspace")) {
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i = -7;
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}
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}
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if (0 != i) {
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aDocument.WarnOnceAbout(
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dom::DeprecatedOperations::eMathML_DeprecatedMathSpaceValue);
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aCSSValue.SetFloatValue(float(i) / float(18), eCSSUnit_EM);
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return true;
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}
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return false;
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}
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// The REC says:
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//
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// "Most presentation elements have attributes that accept values representing
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// lengths to be used for size, spacing or similar properties. The syntax of a
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// length is specified as
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//
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// number | number unit | namedspace
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//
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// There should be no space between the number and the unit of a length."
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//
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// "A trailing '%' represents a percent of the default value. The default
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// value, or how it is obtained, is listed in the table of attributes for each
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// element. [...] A number without a unit is intepreted as a multiple of the
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// default value."
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//
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// "The possible units in MathML are:
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//
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// Unit Description
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// em an em (font-relative unit traditionally used for horizontal lengths)
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// ex an ex (font-relative unit traditionally used for vertical lengths)
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// px pixels, or size of a pixel in the current display
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// in inches (1 inch = 2.54 centimeters)
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// cm centimeters
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// mm millimeters
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// pt points (1 point = 1/72 inch)
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// pc picas (1 pica = 12 points)
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// % percentage of default value"
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//
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// The numbers are defined that way:
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// - unsigned-number: "a string of decimal digits with up to one decimal point
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// (U+002E), representing a non-negative terminating decimal number (a type of
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// rational number)"
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// - number: "an optional prefix of '-' (U+002D), followed by an unsigned
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// number, representing a terminating decimal number (a type of rational
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// number)"
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//
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/* static */
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// XXXfredw: Deprecate legacy MathML syntax and use the CSS parser instead.
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// See https://github.com/mathml-refresh/mathml/issues/63
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bool MathMLElement::ParseNumericValue(const nsString& aString,
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nsCSSValue& aCSSValue, uint32_t aFlags,
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Document* aDocument) {
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nsAutoString str(aString);
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str.CompressWhitespace(); // aString is const in this code...
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int32_t stringLength = str.Length();
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if (!stringLength) {
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if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) {
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ReportLengthParseError(aString, aDocument);
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}
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return false;
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}
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if (aDocument && ParseNamedSpaceValue(str, aCSSValue, aFlags, *aDocument)) {
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return true;
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}
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nsAutoString number, unit;
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// see if the negative sign is there
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int32_t i = 0;
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char16_t c = str[0];
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if (c == '-') {
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number.Append(c);
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i++;
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}
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// Gather up characters that make up the number
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bool gotDot = false;
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for (; i < stringLength; i++) {
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c = str[i];
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if (gotDot && c == '.') {
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if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) {
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ReportLengthParseError(aString, aDocument);
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}
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return false; // two dots encountered
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} else if (c == '.')
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gotDot = true;
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else if (!IsAsciiDigit(c)) {
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str.Right(unit, stringLength - i);
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// some authors leave blanks before the unit, but that shouldn't
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// be allowed, so don't CompressWhitespace on 'unit'.
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break;
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}
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number.Append(c);
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}
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if (gotDot && str[i - 1] == '.') {
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if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) {
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ReportLengthParseError(aString, aDocument);
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}
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return false; // Number ending with a dot.
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}
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// Convert number to floating point
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nsresult errorCode;
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float floatValue = number.ToFloat(&errorCode);
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if (NS_FAILED(errorCode)) {
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if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) {
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ReportLengthParseError(aString, aDocument);
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}
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return false;
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}
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if (floatValue < 0 && !(aFlags & PARSE_ALLOW_NEGATIVE)) {
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if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) {
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ReportLengthParseError(aString, aDocument);
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}
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return false;
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}
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nsCSSUnit cssUnit;
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if (unit.IsEmpty()) {
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// We are supposed to have a unit, but there isn't one.
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// If the value is 0 we can just call it "pixels" otherwise
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// this is illegal.
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if (floatValue != 0.0) {
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if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) {
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ReportLengthParseError(aString, aDocument);
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}
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return false;
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}
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cssUnit = eCSSUnit_Pixel;
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} else if (unit.EqualsLiteral("%")) {
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aCSSValue.SetPercentValue(floatValue / 100.0f);
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return true;
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} else if (unit.LowerCaseEqualsLiteral("em"))
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cssUnit = eCSSUnit_EM;
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else if (unit.LowerCaseEqualsLiteral("ex"))
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cssUnit = eCSSUnit_XHeight;
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else if (unit.LowerCaseEqualsLiteral("px"))
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cssUnit = eCSSUnit_Pixel;
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else if (unit.LowerCaseEqualsLiteral("in"))
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cssUnit = eCSSUnit_Inch;
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else if (unit.LowerCaseEqualsLiteral("cm"))
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cssUnit = eCSSUnit_Centimeter;
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else if (unit.LowerCaseEqualsLiteral("mm"))
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cssUnit = eCSSUnit_Millimeter;
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else if (unit.LowerCaseEqualsLiteral("pt"))
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cssUnit = eCSSUnit_Point;
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else if (unit.LowerCaseEqualsLiteral("pc"))
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cssUnit = eCSSUnit_Pica;
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else if (unit.LowerCaseEqualsLiteral("q"))
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cssUnit = eCSSUnit_Quarter;
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else { // unexpected unit
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if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) {
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ReportLengthParseError(aString, aDocument);
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}
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return false;
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}
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aCSSValue.SetFloatValue(floatValue, cssUnit);
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return true;
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}
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void MathMLElement::MapMathMLAttributesInto(
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const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) {
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// scriptsizemultiplier
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//
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// "Specifies the multiplier to be used to adjust font size due to changes
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// in scriptlevel.
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//
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// values: number
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// default: 0.71
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//
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const nsAttrValue* value =
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aAttributes->GetAttr(nsGkAtoms::scriptsizemultiplier_);
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if (value && value->Type() == nsAttrValue::eString &&
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!aDecls.PropertyIsSet(eCSSProperty__moz_script_size_multiplier)) {
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aDecls.Document()->WarnOnceAbout(
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dom::DeprecatedOperations::
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eMathML_DeprecatedScriptsizemultiplierAttribute);
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auto str = value->GetStringValue();
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str.CompressWhitespace();
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// MathML numbers can't have leading '+'
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if (str.Length() > 0 && str.CharAt(0) != '+') {
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nsresult errorCode;
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float floatValue = str.ToFloat(&errorCode);
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// Negative scriptsizemultipliers are not parsed
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if (NS_SUCCEEDED(errorCode) && floatValue >= 0.0f) {
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aDecls.SetNumberValue(eCSSProperty__moz_script_size_multiplier,
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floatValue);
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} else {
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ReportParseErrorNoTag(str, nsGkAtoms::scriptsizemultiplier_,
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aDecls.Document());
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}
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}
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}
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// scriptminsize
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//
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// "Specifies the minimum font size allowed due to changes in scriptlevel.
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// Note that this does not limit the font size due to changes to mathsize."
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//
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// values: length
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// default: 8pt
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//
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// We don't allow negative values.
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// Unitless and percent values give a multiple of the default value.
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//
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value = aAttributes->GetAttr(nsGkAtoms::scriptminsize_);
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if (value && value->Type() == nsAttrValue::eString &&
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!aDecls.PropertyIsSet(eCSSProperty__moz_script_min_size)) {
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aDecls.Document()->WarnOnceAbout(
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dom::DeprecatedOperations::eMathML_DeprecatedScriptminsizeAttribute);
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nsCSSValue scriptMinSize;
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ParseNumericValue(value->GetStringValue(), scriptMinSize,
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PARSE_ALLOW_UNITLESS | CONVERT_UNITLESS_TO_PERCENT,
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aDecls.Document());
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if (scriptMinSize.GetUnit() == eCSSUnit_Percent) {
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scriptMinSize.SetFloatValue(8.0 * scriptMinSize.GetPercentValue(),
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eCSSUnit_Point);
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}
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if (scriptMinSize.GetUnit() != eCSSUnit_Null) {
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aDecls.SetLengthValue(eCSSProperty__moz_script_min_size, scriptMinSize);
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}
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}
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// scriptlevel
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//
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// "Changes the scriptlevel in effect for the children. When the value is
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// given without a sign, it sets scriptlevel to the specified value; when a
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// sign is given, it increments ("+") or decrements ("-") the current
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// value. (Note that large decrements can result in negative values of
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// scriptlevel, but these values are considered legal.)"
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//
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// values: ( "+" | "-" )? unsigned-integer
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// default: inherited
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//
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value = aAttributes->GetAttr(nsGkAtoms::scriptlevel_);
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if (value && value->Type() == nsAttrValue::eString &&
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!aDecls.PropertyIsSet(eCSSProperty_math_depth)) {
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auto str = value->GetStringValue();
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str.CompressWhitespace();
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if (str.Length() > 0) {
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nsresult errorCode;
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int32_t intValue = str.ToInteger(&errorCode);
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if (NS_SUCCEEDED(errorCode)) {
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char16_t ch = str.CharAt(0);
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bool isRelativeScriptLevel = (ch == '+' || ch == '-');
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aDecls.SetMathDepthValue(intValue, isRelativeScriptLevel);
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} else {
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ReportParseErrorNoTag(str, nsGkAtoms::scriptlevel_, aDecls.Document());
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}
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}
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}
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// mathsize
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//
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// "Specifies the size to display the token content. The values 'small' and
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// 'big' choose a size smaller or larger than the current font size, but
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// leave the exact proportions unspecified; 'normal' is allowed for
|
|
// completeness, but since it is equivalent to '100%' or '1em', it has no
|
|
// effect."
|
|
//
|
|
// values: "small" | "normal" | "big" | length
|
|
// default: inherited
|
|
//
|
|
// fontsize
|
|
//
|
|
// "Specified the size for the token. Deprecated in favor of mathsize."
|
|
//
|
|
// values: length
|
|
// default: inherited
|
|
//
|
|
// In both cases, we don't allow negative values.
|
|
// Unitless values give a multiple of the default value.
|
|
//
|
|
bool parseSizeKeywords = !StaticPrefs::mathml_mathsize_names_disabled();
|
|
value = aAttributes->GetAttr(nsGkAtoms::mathsize_);
|
|
if (!value) {
|
|
parseSizeKeywords = false;
|
|
value = aAttributes->GetAttr(nsGkAtoms::fontsize_);
|
|
if (value) {
|
|
aDecls.Document()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedStyleAttribute);
|
|
}
|
|
}
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
!aDecls.PropertyIsSet(eCSSProperty_font_size)) {
|
|
auto str = value->GetStringValue();
|
|
nsCSSValue fontSize;
|
|
uint32_t flags = PARSE_ALLOW_UNITLESS | CONVERT_UNITLESS_TO_PERCENT;
|
|
if (parseSizeKeywords) {
|
|
// Do not warn for invalid value if mathsize keywords are accepted.
|
|
flags |= PARSE_SUPPRESS_WARNINGS;
|
|
}
|
|
if (!ParseNumericValue(str, fontSize, flags, nullptr) &&
|
|
parseSizeKeywords) {
|
|
static const char sizes[3][7] = {"small", "normal", "big"};
|
|
static const StyleFontSizeKeyword values[MOZ_ARRAY_LENGTH(sizes)] = {
|
|
StyleFontSizeKeyword::Small, StyleFontSizeKeyword::Medium,
|
|
StyleFontSizeKeyword::Large};
|
|
str.CompressWhitespace();
|
|
for (uint32_t i = 0; i < ArrayLength(sizes); ++i) {
|
|
if (str.EqualsASCII(sizes[i])) {
|
|
aDecls.Document()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedMathSizeValue);
|
|
aDecls.SetKeywordValue(eCSSProperty_font_size, values[i]);
|
|
break;
|
|
}
|
|
}
|
|
} else if (fontSize.GetUnit() == eCSSUnit_Percent) {
|
|
aDecls.SetPercentValue(eCSSProperty_font_size,
|
|
fontSize.GetPercentValue());
|
|
} else if (fontSize.GetUnit() != eCSSUnit_Null) {
|
|
aDecls.SetLengthValue(eCSSProperty_font_size, fontSize);
|
|
}
|
|
}
|
|
|
|
// fontfamily
|
|
//
|
|
// "Should be the name of a font that may be available to a MathML renderer,
|
|
// or a CSS font specification; See Section 6.5 Using CSS with MathML and
|
|
// CSS for more information. Deprecated in favor of mathvariant."
|
|
//
|
|
// values: string
|
|
//
|
|
value = aAttributes->GetAttr(nsGkAtoms::fontfamily_);
|
|
if (value) {
|
|
aDecls.Document()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedStyleAttribute);
|
|
}
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
!aDecls.PropertyIsSet(eCSSProperty_font_family)) {
|
|
aDecls.SetFontFamily(value->GetStringValue());
|
|
}
|
|
|
|
// fontstyle
|
|
//
|
|
// "Specified the font style to use for the token. Deprecated in favor of
|
|
// mathvariant."
|
|
//
|
|
// values: "normal" | "italic"
|
|
// default: normal (except on <mi>)
|
|
//
|
|
// Note that the font-style property is reset in layout/style/ when
|
|
// -moz-math-variant is specified.
|
|
value = aAttributes->GetAttr(nsGkAtoms::fontstyle_);
|
|
if (value) {
|
|
aDecls.Document()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedStyleAttribute);
|
|
if (value->Type() == nsAttrValue::eString &&
|
|
!aDecls.PropertyIsSet(eCSSProperty_font_style)) {
|
|
auto str = value->GetStringValue();
|
|
str.CompressWhitespace();
|
|
// FIXME(emilio): This should use FontSlantStyle or what not. Or even
|
|
// better, it looks deprecated since forever, we should just kill it.
|
|
if (str.EqualsASCII("normal")) {
|
|
aDecls.SetKeywordValue(eCSSProperty_font_style, NS_FONT_STYLE_NORMAL);
|
|
} else if (str.EqualsASCII("italic")) {
|
|
aDecls.SetKeywordValue(eCSSProperty_font_style, NS_FONT_STYLE_ITALIC);
|
|
}
|
|
}
|
|
}
|
|
|
|
// fontweight
|
|
//
|
|
// "Specified the font weight for the token. Deprecated in favor of
|
|
// mathvariant."
|
|
//
|
|
// values: "normal" | "bold"
|
|
// default: normal
|
|
//
|
|
// Note that the font-weight property is reset in layout/style/ when
|
|
// -moz-math-variant is specified.
|
|
value = aAttributes->GetAttr(nsGkAtoms::fontweight_);
|
|
if (value) {
|
|
aDecls.Document()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedStyleAttribute);
|
|
if (value->Type() == nsAttrValue::eString &&
|
|
!aDecls.PropertyIsSet(eCSSProperty_font_weight)) {
|
|
auto str = value->GetStringValue();
|
|
str.CompressWhitespace();
|
|
if (str.EqualsASCII("normal")) {
|
|
aDecls.SetKeywordValue(eCSSProperty_font_weight,
|
|
FontWeight::Normal().ToFloat());
|
|
} else if (str.EqualsASCII("bold")) {
|
|
aDecls.SetKeywordValue(eCSSProperty_font_weight,
|
|
FontWeight::Bold().ToFloat());
|
|
}
|
|
}
|
|
}
|
|
|
|
// mathvariant
|
|
//
|
|
// "Specifies the logical class of the token. Note that this class is more
|
|
// than styling, it typically conveys semantic intent;"
|
|
//
|
|
// values: "normal" | "bold" | "italic" | "bold-italic" | "double-struck" |
|
|
// "bold-fraktur" | "script" | "bold-script" | "fraktur" | "sans-serif" |
|
|
// "bold-sans-serif" | "sans-serif-italic" | "sans-serif-bold-italic" |
|
|
// "monospace" | "initial" | "tailed" | "looped" | "stretched"
|
|
// default: normal (except on <mi>)
|
|
//
|
|
value = aAttributes->GetAttr(nsGkAtoms::mathvariant_);
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
!aDecls.PropertyIsSet(eCSSProperty__moz_math_variant)) {
|
|
auto str = value->GetStringValue();
|
|
str.CompressWhitespace();
|
|
static const char sizes[19][23] = {"normal",
|
|
"bold",
|
|
"italic",
|
|
"bold-italic",
|
|
"script",
|
|
"bold-script",
|
|
"fraktur",
|
|
"double-struck",
|
|
"bold-fraktur",
|
|
"sans-serif",
|
|
"bold-sans-serif",
|
|
"sans-serif-italic",
|
|
"sans-serif-bold-italic",
|
|
"monospace",
|
|
"initial",
|
|
"tailed",
|
|
"looped",
|
|
"stretched"};
|
|
static const int32_t values[MOZ_ARRAY_LENGTH(sizes)] = {
|
|
NS_MATHML_MATHVARIANT_NORMAL,
|
|
NS_MATHML_MATHVARIANT_BOLD,
|
|
NS_MATHML_MATHVARIANT_ITALIC,
|
|
NS_MATHML_MATHVARIANT_BOLD_ITALIC,
|
|
NS_MATHML_MATHVARIANT_SCRIPT,
|
|
NS_MATHML_MATHVARIANT_BOLD_SCRIPT,
|
|
NS_MATHML_MATHVARIANT_FRAKTUR,
|
|
NS_MATHML_MATHVARIANT_DOUBLE_STRUCK,
|
|
NS_MATHML_MATHVARIANT_BOLD_FRAKTUR,
|
|
NS_MATHML_MATHVARIANT_SANS_SERIF,
|
|
NS_MATHML_MATHVARIANT_BOLD_SANS_SERIF,
|
|
NS_MATHML_MATHVARIANT_SANS_SERIF_ITALIC,
|
|
NS_MATHML_MATHVARIANT_SANS_SERIF_BOLD_ITALIC,
|
|
NS_MATHML_MATHVARIANT_MONOSPACE,
|
|
NS_MATHML_MATHVARIANT_INITIAL,
|
|
NS_MATHML_MATHVARIANT_TAILED,
|
|
NS_MATHML_MATHVARIANT_LOOPED,
|
|
NS_MATHML_MATHVARIANT_STRETCHED};
|
|
for (uint32_t i = 0; i < ArrayLength(sizes); ++i) {
|
|
if (str.LowerCaseEqualsASCII(sizes[i])) {
|
|
aDecls.SetKeywordValue(eCSSProperty__moz_math_variant, values[i]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// mathbackground
|
|
//
|
|
// "Specifies the background color to be used to fill in the bounding box of
|
|
// the element and its children. The default, 'transparent', lets the
|
|
// background color, if any, used in the current rendering context to show
|
|
// through."
|
|
//
|
|
// values: color | "transparent"
|
|
// default: "transparent"
|
|
//
|
|
// background
|
|
//
|
|
// "Specified the background color to be used to fill in the bounding box of
|
|
// the element and its children. Deprecated in favor of mathbackground."
|
|
//
|
|
// values: color | "transparent"
|
|
// default: "transparent"
|
|
//
|
|
value = aAttributes->GetAttr(nsGkAtoms::mathbackground_);
|
|
if (!value) {
|
|
value = aAttributes->GetAttr(nsGkAtoms::background);
|
|
if (value) {
|
|
aDecls.Document()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedStyleAttribute);
|
|
}
|
|
}
|
|
if (value) {
|
|
nscolor color;
|
|
if (value->GetColorValue(color)) {
|
|
aDecls.SetColorValueIfUnset(eCSSProperty_background_color, color);
|
|
}
|
|
}
|
|
|
|
// mathcolor
|
|
//
|
|
// "Specifies the foreground color to use when drawing the components of this
|
|
// element, such as the content for token elements or any lines, surds, or
|
|
// other decorations. It also establishes the default mathcolor used for
|
|
// child elements when used on a layout element."
|
|
//
|
|
// values: color
|
|
// default: inherited
|
|
//
|
|
// color
|
|
//
|
|
// "Specified the color for the token. Deprecated in favor of mathcolor."
|
|
//
|
|
// values: color
|
|
// default: inherited
|
|
//
|
|
value = aAttributes->GetAttr(nsGkAtoms::mathcolor_);
|
|
if (!value) {
|
|
value = aAttributes->GetAttr(nsGkAtoms::color);
|
|
if (value) {
|
|
aDecls.Document()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedStyleAttribute);
|
|
}
|
|
}
|
|
nscolor color;
|
|
if (value && value->GetColorValue(color)) {
|
|
aDecls.SetColorValueIfUnset(eCSSProperty_color, color);
|
|
}
|
|
|
|
// width
|
|
//
|
|
// "Specifies the desired width of the entire table and is intended for
|
|
// visual user agents. When the value is a percentage value, the value is
|
|
// relative to the horizontal space a MathML renderer has available for the
|
|
// math element. When the value is "auto", the MathML renderer should
|
|
// calculate the table width from its contents using whatever layout
|
|
// algorithm it chooses. "
|
|
//
|
|
// values: "auto" | length
|
|
// default: auto
|
|
//
|
|
if (!aDecls.PropertyIsSet(eCSSProperty_width)) {
|
|
const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::width);
|
|
nsCSSValue width;
|
|
// This does not handle auto and unitless values
|
|
if (value && value->Type() == nsAttrValue::eString) {
|
|
ParseNumericValue(value->GetStringValue(), width, 0, aDecls.Document());
|
|
if (width.GetUnit() == eCSSUnit_Percent) {
|
|
aDecls.SetPercentValue(eCSSProperty_width, width.GetPercentValue());
|
|
} else if (width.GetUnit() != eCSSUnit_Null) {
|
|
aDecls.SetLengthValue(eCSSProperty_width, width);
|
|
}
|
|
}
|
|
}
|
|
|
|
// dir
|
|
//
|
|
// Overall Directionality of Mathematics Formulas:
|
|
// "The overall directionality for a formula, basically the direction of the
|
|
// Layout Schemata, is specified by the dir attribute on the containing math
|
|
// element (see Section 2.2 The Top-Level math Element). The default is ltr.
|
|
// [...] The overall directionality is usually set on the math, but may also
|
|
// be switched for individual subformula by using the dir attribute on mrow
|
|
// or mstyle elements."
|
|
//
|
|
// Bidirectional Layout in Token Elements:
|
|
// "Specifies the initial directionality for text within the token:
|
|
// ltr (Left To Right) or rtl (Right To Left). This attribute should only be
|
|
// needed in rare cases involving weak or neutral characters;
|
|
// see Section 3.1.5.1 Overall Directionality of Mathematics Formulas for
|
|
// further discussion. It has no effect on mspace."
|
|
//
|
|
// values: "ltr" | "rtl"
|
|
// default: inherited
|
|
//
|
|
value = aAttributes->GetAttr(nsGkAtoms::dir);
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
!aDecls.PropertyIsSet(eCSSProperty_direction)) {
|
|
auto str = value->GetStringValue();
|
|
static const char dirs[][4] = {"ltr", "rtl"};
|
|
static const StyleDirection dirValues[MOZ_ARRAY_LENGTH(dirs)] = {
|
|
StyleDirection::Ltr, StyleDirection::Rtl};
|
|
for (uint32_t i = 0; i < ArrayLength(dirs); ++i) {
|
|
if (str.LowerCaseEqualsASCII(dirs[i])) {
|
|
aDecls.SetKeywordValue(eCSSProperty_direction, dirValues[i]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// displaystyle
|
|
// https://mathml-refresh.github.io/mathml-core/#dfn-displaystyle
|
|
value = aAttributes->GetAttr(nsGkAtoms::displaystyle_);
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
!aDecls.PropertyIsSet(eCSSProperty_math_style)) {
|
|
auto str = value->GetStringValue();
|
|
static const char displaystyles[][6] = {"false", "true"};
|
|
static const uint8_t mathStyle[MOZ_ARRAY_LENGTH(displaystyles)] = {
|
|
NS_STYLE_MATH_STYLE_COMPACT, NS_STYLE_MATH_STYLE_NORMAL};
|
|
for (uint32_t i = 0; i < ArrayLength(displaystyles); ++i) {
|
|
if (str.LowerCaseEqualsASCII(displaystyles[i])) {
|
|
aDecls.SetKeywordValue(eCSSProperty_math_style, mathStyle[i]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void MathMLElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
|
|
Element::GetEventTargetParent(aVisitor);
|
|
|
|
GetEventTargetParentForLinks(aVisitor);
|
|
}
|
|
|
|
nsresult MathMLElement::PostHandleEvent(EventChainPostVisitor& aVisitor) {
|
|
return PostHandleEventForLinks(aVisitor);
|
|
}
|
|
|
|
NS_IMPL_ELEMENT_CLONE(MathMLElement)
|
|
|
|
EventStates MathMLElement::IntrinsicState() const {
|
|
return Link::LinkState() | MathMLElementBase::IntrinsicState() |
|
|
(mIncrementScriptLevel ? NS_EVENT_STATE_INCREMENT_SCRIPT_LEVEL
|
|
: EventStates());
|
|
}
|
|
|
|
bool MathMLElement::IsNodeOfType(uint32_t aFlags) const { return false; }
|
|
|
|
void MathMLElement::SetIncrementScriptLevel(bool aIncrementScriptLevel,
|
|
bool aNotify) {
|
|
if (aIncrementScriptLevel == mIncrementScriptLevel) return;
|
|
mIncrementScriptLevel = aIncrementScriptLevel;
|
|
|
|
NS_ASSERTION(aNotify, "We always notify!");
|
|
|
|
UpdateState(true);
|
|
}
|
|
|
|
int32_t MathMLElement::TabIndexDefault() {
|
|
nsCOMPtr<nsIURI> uri;
|
|
return IsLink(getter_AddRefs(uri)) ? 0 : -1;
|
|
}
|
|
|
|
// XXX Bug 1586011: Share logic with other element classes.
|
|
bool MathMLElement::IsFocusableInternal(int32_t* aTabIndex, bool aWithMouse) {
|
|
Document* doc = GetComposedDoc();
|
|
if (!doc || doc->HasFlag(NODE_IS_EDITABLE)) {
|
|
// In designMode documents we only allow focusing the document.
|
|
if (aTabIndex) {
|
|
*aTabIndex = -1;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int32_t tabIndex = TabIndex();
|
|
if (aTabIndex) {
|
|
*aTabIndex = tabIndex;
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> uri;
|
|
if (!IsLink(getter_AddRefs(uri))) {
|
|
// If a tabindex is specified at all we're focusable
|
|
return GetTabIndexAttrValue().isSome();
|
|
}
|
|
|
|
if (!OwnerDoc()->LinkHandlingEnabled()) {
|
|
return false;
|
|
}
|
|
|
|
// Links that are in an editable region should never be focusable, even if
|
|
// they are in a contenteditable="false" region.
|
|
if (nsContentUtils::IsNodeInEditableRegion(this)) {
|
|
if (aTabIndex) {
|
|
*aTabIndex = -1;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (aTabIndex && (sTabFocusModel & eTabFocus_linksMask) == 0) {
|
|
*aTabIndex = -1;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool MathMLElement::IsLink(nsIURI** aURI) const {
|
|
bool hasHref = false;
|
|
const nsAttrValue* href = mAttrs.GetAttr(nsGkAtoms::href, kNameSpaceID_None);
|
|
if (href) {
|
|
// MathML href
|
|
// The REC says: "When user agents encounter MathML elements with both href
|
|
// and xlink:href attributes, the href attribute should take precedence."
|
|
hasHref = true;
|
|
} else if (!StaticPrefs::mathml_xlink_disabled()) {
|
|
// To be a clickable XLink for styling and interaction purposes, we require:
|
|
//
|
|
// xlink:href - must be set
|
|
// xlink:type - must be unset or set to "" or set to "simple"
|
|
// xlink:show - must be unset or set to "", "new" or "replace"
|
|
// xlink:actuate - must be unset or set to "" or "onRequest"
|
|
//
|
|
// For any other values, we're either not a *clickable* XLink, or the end
|
|
// result is poorly specified. Either way, we return false.
|
|
|
|
static Element::AttrValuesArray sTypeVals[] = {nsGkAtoms::_empty,
|
|
nsGkAtoms::simple, nullptr};
|
|
|
|
static Element::AttrValuesArray sShowVals[] = {
|
|
nsGkAtoms::_empty, nsGkAtoms::_new, nsGkAtoms::replace, nullptr};
|
|
|
|
static Element::AttrValuesArray sActuateVals[] = {
|
|
nsGkAtoms::_empty, nsGkAtoms::onRequest, nullptr};
|
|
|
|
// Optimization: check for href first for early return
|
|
href = mAttrs.GetAttr(nsGkAtoms::href, kNameSpaceID_XLink);
|
|
if (href &&
|
|
FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::type, sTypeVals,
|
|
eCaseMatters) != Element::ATTR_VALUE_NO_MATCH &&
|
|
FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show, sShowVals,
|
|
eCaseMatters) != Element::ATTR_VALUE_NO_MATCH &&
|
|
FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::actuate, sActuateVals,
|
|
eCaseMatters) != Element::ATTR_VALUE_NO_MATCH) {
|
|
OwnerDoc()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedXLinkAttribute);
|
|
hasHref = true;
|
|
}
|
|
}
|
|
|
|
if (hasHref) {
|
|
// Get absolute URI
|
|
nsAutoString hrefStr;
|
|
href->ToString(hrefStr);
|
|
nsContentUtils::NewURIWithDocumentCharset(aURI, hrefStr, OwnerDoc(),
|
|
GetBaseURI());
|
|
// must promise out param is non-null if we return true
|
|
return !!*aURI;
|
|
}
|
|
|
|
*aURI = nullptr;
|
|
return false;
|
|
}
|
|
|
|
void MathMLElement::GetLinkTarget(nsAString& aTarget) {
|
|
if (StaticPrefs::mathml_xlink_disabled()) {
|
|
MathMLElementBase::GetLinkTarget(aTarget);
|
|
return;
|
|
}
|
|
|
|
const nsAttrValue* target =
|
|
mAttrs.GetAttr(nsGkAtoms::target, kNameSpaceID_XLink);
|
|
if (target) {
|
|
OwnerDoc()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedXLinkAttribute);
|
|
target->ToString(aTarget);
|
|
}
|
|
|
|
if (aTarget.IsEmpty()) {
|
|
static Element::AttrValuesArray sShowVals[] = {nsGkAtoms::_new,
|
|
nsGkAtoms::replace, nullptr};
|
|
|
|
bool hasDeprecatedShowAttribute = true;
|
|
switch (FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show, sShowVals,
|
|
eCaseMatters)) {
|
|
case ATTR_MISSING:
|
|
hasDeprecatedShowAttribute = false;
|
|
break;
|
|
case 0:
|
|
aTarget.AssignLiteral("_blank");
|
|
return;
|
|
case 1:
|
|
return;
|
|
}
|
|
if (hasDeprecatedShowAttribute) {
|
|
OwnerDoc()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedXLinkAttribute);
|
|
}
|
|
OwnerDoc()->GetBaseTarget(aTarget);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<nsIURI> MathMLElement::GetHrefURI() const {
|
|
nsCOMPtr<nsIURI> hrefURI;
|
|
return IsLink(getter_AddRefs(hrefURI)) ? hrefURI.forget() : nullptr;
|
|
}
|
|
|
|
// XXX Bug 1586014: Share logic with other element classes.
|
|
void MathMLElement::RecompileScriptEventListeners() {
|
|
int32_t i, count = mAttrs.AttrCount();
|
|
for (i = 0; i < count; ++i) {
|
|
const nsAttrName* name = mAttrs.AttrNameAt(i);
|
|
|
|
// Eventlistenener-attributes are always in the null namespace
|
|
if (!name->IsAtom()) {
|
|
continue;
|
|
}
|
|
|
|
nsAtom* attr = name->Atom();
|
|
if (!IsEventAttributeName(attr)) {
|
|
continue;
|
|
}
|
|
|
|
nsAutoString value;
|
|
GetAttr(kNameSpaceID_None, attr, value);
|
|
SetEventHandler(GetEventNameForAttr(attr), value, true);
|
|
}
|
|
}
|
|
|
|
bool MathMLElement::IsEventAttributeNameInternal(nsAtom* aName) {
|
|
// The intent is to align MathML event attributes on HTML5, so the flag
|
|
// EventNameType_HTML is used here.
|
|
return nsContentUtils::IsEventAttributeName(aName, EventNameType_HTML);
|
|
}
|
|
|
|
nsresult MathMLElement::BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
|
|
const nsAttrValueOrString* aValue,
|
|
bool aNotify) {
|
|
if (aNamespaceID == kNameSpaceID_None) {
|
|
if (!aValue && IsEventAttributeName(aName)) {
|
|
if (EventListenerManager* manager = GetExistingListenerManager()) {
|
|
manager->RemoveEventHandler(GetEventNameForAttr(aName));
|
|
}
|
|
}
|
|
}
|
|
|
|
return MathMLElementBase::BeforeSetAttr(aNamespaceID, aName, aValue, aNotify);
|
|
}
|
|
|
|
nsresult MathMLElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
|
|
const nsAttrValue* aValue,
|
|
const nsAttrValue* aOldValue,
|
|
nsIPrincipal* aSubjectPrincipal,
|
|
bool aNotify) {
|
|
// It is important that this be done after the attribute is set/unset.
|
|
// We will need the updated attribute value because notifying the document
|
|
// that content states have changed will call IntrinsicState, which will try
|
|
// to get updated information about the visitedness from Link.
|
|
if (aName == nsGkAtoms::href && (aNameSpaceID == kNameSpaceID_None ||
|
|
(!StaticPrefs::mathml_xlink_disabled() &&
|
|
aNameSpaceID == kNameSpaceID_XLink))) {
|
|
if (aValue && aNameSpaceID == kNameSpaceID_XLink) {
|
|
OwnerDoc()->WarnOnceAbout(
|
|
dom::DeprecatedOperations::eMathML_DeprecatedXLinkAttribute);
|
|
}
|
|
// Note: When unsetting href, there may still be another href since there
|
|
// are 2 possible namespaces.
|
|
Link::ResetLinkState(aNotify, aValue || Link::ElementHasHref());
|
|
}
|
|
|
|
if (aNameSpaceID == kNameSpaceID_None) {
|
|
if (IsEventAttributeName(aName) && aValue) {
|
|
MOZ_ASSERT(aValue->Type() == nsAttrValue::eString,
|
|
"Expected string value for script body");
|
|
SetEventHandler(GetEventNameForAttr(aName), aValue->GetStringValue());
|
|
}
|
|
}
|
|
|
|
return MathMLElementBase::AfterSetAttr(aNameSpaceID, aName, aValue, aOldValue,
|
|
aSubjectPrincipal, aNotify);
|
|
}
|
|
|
|
JSObject* MathMLElement::WrapNode(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) {
|
|
return MathMLElement_Binding::Wrap(aCx, this, aGivenProto);
|
|
}
|