зеркало из https://github.com/mozilla/gecko-dev.git
1125 строки
39 KiB
C++
1125 строки
39 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 "nsMathMLElement.h"
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#include "base/compiler_specific.h"
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#include "mozilla/ArrayUtils.h"
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#include "nsGkAtoms.h"
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#include "nsCRT.h"
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#include "nsLayoutStylesheetCache.h"
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#include "nsRuleData.h"
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#include "nsCSSValue.h"
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#include "nsCSSParser.h"
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#include "nsMappedAttributes.h"
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#include "nsStyleConsts.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.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/dom/ElementBinding.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(nsMathMLElement, nsMathMLElementBase,
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nsIDOMElement, nsIDOMNode, Link)
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static nsresult
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WarnDeprecated(const char16_t* aDeprecatedAttribute,
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const char16_t* aFavoredAttribute, nsIDocument* aDocument)
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{
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const char16_t *argv[] =
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{ aDeprecatedAttribute, aFavoredAttribute };
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return nsContentUtils::
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ReportToConsole(nsIScriptError::warningFlag,
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NS_LITERAL_CSTRING("MathML"), aDocument,
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nsContentUtils::eMATHML_PROPERTIES,
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"DeprecatedSupersededBy", argv, 2);
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}
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static nsresult
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ReportLengthParseError(const nsString& aValue, nsIDocument* aDocument)
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{
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const char16_t *arg = aValue.get();
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return nsContentUtils::
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ReportToConsole(nsIScriptError::errorFlag,
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NS_LITERAL_CSTRING("MathML"), aDocument,
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nsContentUtils::eMATHML_PROPERTIES,
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"LengthParsingError", &arg, 1);
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}
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static nsresult
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ReportParseErrorNoTag(const nsString& aValue,
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nsIAtom* aAtom,
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nsIDocument* aDocument)
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{
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const char16_t *argv[] =
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{ aValue.get(), aAtom->GetUTF16String() };
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return nsContentUtils::
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ReportToConsole(nsIScriptError::errorFlag,
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NS_LITERAL_CSTRING("MathML"), aDocument,
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nsContentUtils::eMATHML_PROPERTIES,
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"AttributeParsingErrorNoTag", argv, 2);
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}
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nsMathMLElement::nsMathMLElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: nsMathMLElementBase(aNodeInfo),
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ALLOW_THIS_IN_INITIALIZER_LIST(Link(this)),
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mIncrementScriptLevel(false)
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{
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}
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nsMathMLElement::nsMathMLElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
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: nsMathMLElementBase(aNodeInfo),
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ALLOW_THIS_IN_INITIALIZER_LIST(Link(this)),
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mIncrementScriptLevel(false)
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{
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}
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nsresult
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nsMathMLElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent,
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bool aCompileEventHandlers)
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{
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Link::ResetLinkState(false, Link::ElementHasHref());
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nsresult rv = nsMathMLElementBase::BindToTree(aDocument, aParent,
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aBindingParent,
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aCompileEventHandlers);
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NS_ENSURE_SUCCESS(rv, rv);
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if (aDocument) {
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aDocument->RegisterPendingLinkUpdate(this);
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}
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nsIDocument* doc = GetComposedDoc();
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if (doc) {
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if (!doc->GetMathMLEnabled()) {
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// Enable MathML and setup the style sheet during binding, not element
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// construction, because we could move a MathML element from the document
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// that created it to another document.
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auto cache = nsLayoutStylesheetCache::For(doc->GetStyleBackendType());
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doc->SetMathMLEnabled();
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doc->EnsureOnDemandBuiltInUASheet(cache->MathMLSheet());
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// Rebuild style data for the presshell, because style system
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// optimizations may have taken place assuming MathML was disabled.
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// (See nsRuleNode::CheckSpecifiedProperties.)
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nsCOMPtr<nsIPresShell> shell = doc->GetShell();
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if (shell) {
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shell->GetPresContext()->
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PostRebuildAllStyleDataEvent(nsChangeHint(0), eRestyle_Subtree);
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}
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}
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}
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return rv;
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}
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void
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nsMathMLElement::UnbindFromTree(bool aDeep, bool aNullParent)
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{
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// If this link is ever reinserted into a document, it might
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// be under a different xml:base, so forget the cached state now.
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Link::ResetLinkState(false, Link::ElementHasHref());
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nsIDocument* doc = GetUncomposedDoc();
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if (doc) {
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doc->UnregisterPendingLinkUpdate(this);
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}
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nsMathMLElementBase::UnbindFromTree(aDeep, aNullParent);
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}
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bool
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nsMathMLElement::ParseAttribute(int32_t aNamespaceID,
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nsIAtom* aAttribute,
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const nsAString& aValue,
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nsAttrValue& aResult)
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{
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if (aNamespaceID == kNameSpaceID_None) {
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if (IsMathMLElement(nsGkAtoms::math) && aAttribute == nsGkAtoms::mode) {
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WarnDeprecated(nsGkAtoms::mode->GetUTF16String(),
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nsGkAtoms::display->GetUTF16String(), OwnerDoc());
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}
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if (aAttribute == nsGkAtoms::color) {
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WarnDeprecated(nsGkAtoms::color->GetUTF16String(),
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nsGkAtoms::mathcolor_->GetUTF16String(), OwnerDoc());
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}
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if (aAttribute == nsGkAtoms::color ||
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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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}
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return nsMathMLElementBase::ParseAttribute(aNamespaceID, aAttribute,
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aValue, aResult);
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}
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static Element::MappedAttributeEntry sMtableStyles[] = {
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{ &nsGkAtoms::width },
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{ nullptr }
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};
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static Element::MappedAttributeEntry sTokenStyles[] = {
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{ &nsGkAtoms::mathsize_ },
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{ &nsGkAtoms::fontsize_ },
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{ &nsGkAtoms::color },
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{ &nsGkAtoms::fontfamily_ },
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{ &nsGkAtoms::fontstyle_ },
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{ &nsGkAtoms::fontweight_ },
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{ &nsGkAtoms::mathvariant_},
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{ nullptr }
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};
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static Element::MappedAttributeEntry sEnvironmentStyles[] = {
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{ &nsGkAtoms::scriptlevel_ },
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{ &nsGkAtoms::scriptminsize_ },
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{ &nsGkAtoms::scriptsizemultiplier_ },
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{ &nsGkAtoms::background },
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{ nullptr }
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};
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static Element::MappedAttributeEntry sCommonPresStyles[] = {
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{ &nsGkAtoms::mathcolor_ },
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{ &nsGkAtoms::mathbackground_ },
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{ nullptr }
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};
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static Element::MappedAttributeEntry sDirStyles[] = {
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{ &nsGkAtoms::dir },
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{ nullptr }
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};
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bool
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nsMathMLElement::IsAttributeMapped(const nsIAtom* aAttribute) const
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{
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static const MappedAttributeEntry* const mtableMap[] = {
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sMtableStyles,
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sCommonPresStyles
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};
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static const MappedAttributeEntry* const tokenMap[] = {
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sTokenStyles,
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sCommonPresStyles,
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sDirStyles
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};
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static const MappedAttributeEntry* const mstyleMap[] = {
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sTokenStyles,
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sEnvironmentStyles,
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sCommonPresStyles,
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sDirStyles
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};
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static const MappedAttributeEntry* const commonPresMap[] = {
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sCommonPresStyles
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};
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static const MappedAttributeEntry* const mrowMap[] = {
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sCommonPresStyles,
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sDirStyles
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};
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// We don't support mglyph (yet).
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if (IsAnyOfMathMLElements(nsGkAtoms::ms_, nsGkAtoms::mi_, nsGkAtoms::mn_,
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nsGkAtoms::mo_, nsGkAtoms::mtext_,
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nsGkAtoms::mspace_))
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return FindAttributeDependence(aAttribute, tokenMap);
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if (IsAnyOfMathMLElements(nsGkAtoms::mstyle_, nsGkAtoms::math))
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return FindAttributeDependence(aAttribute, mstyleMap);
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if (IsMathMLElement(nsGkAtoms::mtable_))
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return FindAttributeDependence(aAttribute, mtableMap);
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if (IsMathMLElement(nsGkAtoms::mrow_))
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return FindAttributeDependence(aAttribute, mrowMap);
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if (IsAnyOfMathMLElements(nsGkAtoms::maction_,
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nsGkAtoms::maligngroup_,
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nsGkAtoms::malignmark_,
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nsGkAtoms::menclose_,
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nsGkAtoms::merror_,
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nsGkAtoms::mfenced_,
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nsGkAtoms::mfrac_,
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nsGkAtoms::mover_,
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nsGkAtoms::mpadded_,
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nsGkAtoms::mphantom_,
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nsGkAtoms::mprescripts_,
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nsGkAtoms::mroot_,
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nsGkAtoms::msqrt_,
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nsGkAtoms::msub_,
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nsGkAtoms::msubsup_,
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nsGkAtoms::msup_,
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nsGkAtoms::mtd_,
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nsGkAtoms::mtr_,
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nsGkAtoms::munder_,
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nsGkAtoms::munderover_,
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nsGkAtoms::none)) {
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return FindAttributeDependence(aAttribute, commonPresMap);
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}
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return false;
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}
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nsMapRuleToAttributesFunc
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nsMathMLElement::GetAttributeMappingFunction() const
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{
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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 */ bool
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nsMathMLElement::ParseNamedSpaceValue(const nsString& aString,
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nsCSSValue& aCSSValue,
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uint32_t aFlags)
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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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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 */ bool
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nsMathMLElement::ParseNumericValue(const nsString& aString,
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nsCSSValue& aCSSValue,
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uint32_t aFlags,
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nsIDocument* aDocument)
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{
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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 (ParseNamedSpaceValue(aString, aCSSValue, aFlags)) {
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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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}
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else if (c == '.')
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gotDot = true;
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else if (!nsCRT::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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// 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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if (aFlags & PARSE_ALLOW_UNITLESS) {
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// no explicit unit, this is a number that will act as a multiplier
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if (!(aFlags & PARSE_SUPPRESS_WARNINGS)) {
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nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
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NS_LITERAL_CSTRING("MathML"), aDocument,
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nsContentUtils::eMATHML_PROPERTIES,
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"UnitlessValuesAreDeprecated");
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}
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if (aFlags & CONVERT_UNITLESS_TO_PERCENT) {
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aCSSValue.SetPercentValue(floatValue);
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return true;
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}
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else
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cssUnit = eCSSUnit_Number;
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} else {
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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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}
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}
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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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}
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else if (unit.EqualsLiteral("em")) cssUnit = eCSSUnit_EM;
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else if (unit.EqualsLiteral("ex")) cssUnit = eCSSUnit_XHeight;
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else if (unit.EqualsLiteral("px")) cssUnit = eCSSUnit_Pixel;
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else if (unit.EqualsLiteral("in")) cssUnit = eCSSUnit_Inch;
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else if (unit.EqualsLiteral("cm")) cssUnit = eCSSUnit_Centimeter;
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else if (unit.EqualsLiteral("mm")) cssUnit = eCSSUnit_Millimeter;
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else if (unit.EqualsLiteral("pt")) cssUnit = eCSSUnit_Point;
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else if (unit.EqualsLiteral("pc")) cssUnit = eCSSUnit_Pica;
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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
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nsMathMLElement::MapMathMLAttributesInto(const nsMappedAttributes* aAttributes,
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nsRuleData* aData)
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{
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if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Font)) {
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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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|
//
|
|
const nsAttrValue* value =
|
|
aAttributes->GetAttr(nsGkAtoms::scriptsizemultiplier_);
|
|
nsCSSValue* scriptSizeMultiplier =
|
|
aData->ValueForScriptSizeMultiplier();
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
scriptSizeMultiplier->GetUnit() == eCSSUnit_Null) {
|
|
nsAutoString str(value->GetStringValue());
|
|
str.CompressWhitespace();
|
|
// MathML numbers can't have leading '+'
|
|
if (str.Length() > 0 && str.CharAt(0) != '+') {
|
|
nsresult errorCode;
|
|
float floatValue = str.ToFloat(&errorCode);
|
|
// Negative scriptsizemultipliers are not parsed
|
|
if (NS_SUCCEEDED(errorCode) && floatValue >= 0.0f) {
|
|
scriptSizeMultiplier->SetFloatValue(floatValue, eCSSUnit_Number);
|
|
} else {
|
|
ReportParseErrorNoTag(str,
|
|
nsGkAtoms::scriptsizemultiplier_,
|
|
aData->mPresContext->Document());
|
|
}
|
|
}
|
|
}
|
|
|
|
// scriptminsize
|
|
//
|
|
// "Specifies the minimum font size allowed due to changes in scriptlevel.
|
|
// Note that this does not limit the font size due to changes to mathsize."
|
|
//
|
|
// values: length
|
|
// default: 8pt
|
|
//
|
|
// We don't allow negative values.
|
|
// Unitless and percent values give a multiple of the default value.
|
|
//
|
|
value = aAttributes->GetAttr(nsGkAtoms::scriptminsize_);
|
|
nsCSSValue* scriptMinSize = aData->ValueForScriptMinSize();
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
scriptMinSize->GetUnit() == eCSSUnit_Null) {
|
|
ParseNumericValue(value->GetStringValue(), *scriptMinSize,
|
|
PARSE_ALLOW_UNITLESS | CONVERT_UNITLESS_TO_PERCENT,
|
|
aData->mPresContext->Document());
|
|
|
|
if (scriptMinSize->GetUnit() == eCSSUnit_Percent) {
|
|
scriptMinSize->SetFloatValue(8.0 * scriptMinSize->GetPercentValue(),
|
|
eCSSUnit_Point);
|
|
}
|
|
}
|
|
|
|
// scriptlevel
|
|
//
|
|
// "Changes the scriptlevel in effect for the children. When the value is
|
|
// given without a sign, it sets scriptlevel to the specified value; when a
|
|
// sign is given, it increments ("+") or decrements ("-") the current
|
|
// value. (Note that large decrements can result in negative values of
|
|
// scriptlevel, but these values are considered legal.)"
|
|
//
|
|
// values: ( "+" | "-" )? unsigned-integer
|
|
// default: inherited
|
|
//
|
|
value = aAttributes->GetAttr(nsGkAtoms::scriptlevel_);
|
|
nsCSSValue* scriptLevel = aData->ValueForScriptLevel();
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
scriptLevel->GetUnit() == eCSSUnit_Null) {
|
|
nsAutoString str(value->GetStringValue());
|
|
str.CompressWhitespace();
|
|
if (str.Length() > 0) {
|
|
nsresult errorCode;
|
|
int32_t intValue = str.ToInteger(&errorCode);
|
|
if (NS_SUCCEEDED(errorCode)) {
|
|
// This is kind of cheesy ... if the scriptlevel has a sign,
|
|
// then it's a relative value and we store the nsCSSValue as an
|
|
// Integer to indicate that. Otherwise we store it as a Number
|
|
// to indicate that the scriptlevel is absolute.
|
|
char16_t ch = str.CharAt(0);
|
|
if (ch == '+' || ch == '-') {
|
|
scriptLevel->SetIntValue(intValue, eCSSUnit_Integer);
|
|
} else {
|
|
scriptLevel->SetFloatValue(intValue, eCSSUnit_Number);
|
|
}
|
|
} else {
|
|
ReportParseErrorNoTag(str,
|
|
nsGkAtoms::scriptlevel_,
|
|
aData->mPresContext->Document());
|
|
}
|
|
}
|
|
}
|
|
|
|
// mathsize
|
|
//
|
|
// "Specifies the size to display the token content. The values 'small' and
|
|
// 'big' choose a size smaller or larger than the current font size, but
|
|
// 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 = true;
|
|
value = aAttributes->GetAttr(nsGkAtoms::mathsize_);
|
|
if (!value) {
|
|
parseSizeKeywords = false;
|
|
value = aAttributes->GetAttr(nsGkAtoms::fontsize_);
|
|
if (value) {
|
|
WarnDeprecated(nsGkAtoms::fontsize_->GetUTF16String(),
|
|
nsGkAtoms::mathsize_->GetUTF16String(),
|
|
aData->mPresContext->Document());
|
|
}
|
|
}
|
|
nsCSSValue* fontSize = aData->ValueForFontSize();
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
fontSize->GetUnit() == eCSSUnit_Null) {
|
|
nsAutoString str(value->GetStringValue());
|
|
if (!ParseNumericValue(str, *fontSize, PARSE_SUPPRESS_WARNINGS |
|
|
PARSE_ALLOW_UNITLESS | CONVERT_UNITLESS_TO_PERCENT,
|
|
nullptr)
|
|
&& parseSizeKeywords) {
|
|
static const char sizes[3][7] = { "small", "normal", "big" };
|
|
static const int32_t values[MOZ_ARRAY_LENGTH(sizes)] = {
|
|
NS_STYLE_FONT_SIZE_SMALL, NS_STYLE_FONT_SIZE_MEDIUM,
|
|
NS_STYLE_FONT_SIZE_LARGE
|
|
};
|
|
str.CompressWhitespace();
|
|
for (uint32_t i = 0; i < ArrayLength(sizes); ++i) {
|
|
if (str.EqualsASCII(sizes[i])) {
|
|
fontSize->SetIntValue(values[i], eCSSUnit_Enumerated);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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_);
|
|
nsCSSValue* fontFamily = aData->ValueForFontFamily();
|
|
if (value) {
|
|
WarnDeprecated(nsGkAtoms::fontfamily_->GetUTF16String(),
|
|
nsGkAtoms::mathvariant_->GetUTF16String(),
|
|
aData->mPresContext->Document());
|
|
}
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
fontFamily->GetUnit() == eCSSUnit_Null) {
|
|
nsCSSParser parser;
|
|
parser.ParseFontFamilyListString(value->GetStringValue(),
|
|
nullptr, 0, *fontFamily);
|
|
}
|
|
|
|
// 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.
|
|
nsCSSValue* fontStyle = aData->ValueForFontStyle();
|
|
value = aAttributes->GetAttr(nsGkAtoms::fontstyle_);
|
|
if (value) {
|
|
WarnDeprecated(nsGkAtoms::fontstyle_->GetUTF16String(),
|
|
nsGkAtoms::mathvariant_->GetUTF16String(),
|
|
aData->mPresContext->Document());
|
|
if (value->Type() == nsAttrValue::eString &&
|
|
fontStyle->GetUnit() == eCSSUnit_Null) {
|
|
nsAutoString str(value->GetStringValue());
|
|
str.CompressWhitespace();
|
|
if (str.EqualsASCII("normal")) {
|
|
fontStyle->SetIntValue(NS_STYLE_FONT_STYLE_NORMAL,
|
|
eCSSUnit_Enumerated);
|
|
} else if (str.EqualsASCII("italic")) {
|
|
fontStyle->SetIntValue(NS_STYLE_FONT_STYLE_ITALIC,
|
|
eCSSUnit_Enumerated);
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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.
|
|
nsCSSValue* fontWeight = aData->ValueForFontWeight();
|
|
value = aAttributes->GetAttr(nsGkAtoms::fontweight_);
|
|
if (value) {
|
|
WarnDeprecated(nsGkAtoms::fontweight_->GetUTF16String(),
|
|
nsGkAtoms::mathvariant_->GetUTF16String(),
|
|
aData->mPresContext->Document());
|
|
if (value->Type() == nsAttrValue::eString &&
|
|
fontWeight->GetUnit() == eCSSUnit_Null) {
|
|
nsAutoString str(value->GetStringValue());
|
|
str.CompressWhitespace();
|
|
if (str.EqualsASCII("normal")) {
|
|
fontWeight->SetIntValue(NS_STYLE_FONT_WEIGHT_NORMAL,
|
|
eCSSUnit_Enumerated);
|
|
} else if (str.EqualsASCII("bold")) {
|
|
fontWeight->SetIntValue(NS_STYLE_FONT_WEIGHT_BOLD,
|
|
eCSSUnit_Enumerated);
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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>)
|
|
//
|
|
nsCSSValue* mathVariant = aData->ValueForMathVariant();
|
|
value = aAttributes->GetAttr(nsGkAtoms::mathvariant_);
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
mathVariant->GetUnit() == eCSSUnit_Null) {
|
|
nsAutoString 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.EqualsASCII(sizes[i])) {
|
|
mathVariant->SetIntValue(values[i], eCSSUnit_Enumerated);
|
|
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"
|
|
//
|
|
if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Background)) {
|
|
const nsAttrValue* value =
|
|
aAttributes->GetAttr(nsGkAtoms::mathbackground_);
|
|
if (!value) {
|
|
value = aAttributes->GetAttr(nsGkAtoms::background);
|
|
if (value) {
|
|
WarnDeprecated(nsGkAtoms::background->GetUTF16String(),
|
|
nsGkAtoms::mathbackground_->GetUTF16String(),
|
|
aData->mPresContext->Document());
|
|
}
|
|
}
|
|
nsCSSValue* backgroundColor = aData->ValueForBackgroundColor();
|
|
if (value && backgroundColor->GetUnit() == eCSSUnit_Null) {
|
|
nscolor color;
|
|
if (value->GetColorValue(color)) {
|
|
backgroundColor->SetColorValue(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
|
|
//
|
|
if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Color)) {
|
|
const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::mathcolor_);
|
|
if (!value) {
|
|
value = aAttributes->GetAttr(nsGkAtoms::color);
|
|
if (value) {
|
|
WarnDeprecated(nsGkAtoms::color->GetUTF16String(),
|
|
nsGkAtoms::mathcolor_->GetUTF16String(),
|
|
aData->mPresContext->Document());
|
|
}
|
|
}
|
|
nscolor color;
|
|
nsCSSValue* colorValue = aData->ValueForColor();
|
|
if (value && value->GetColorValue(color) &&
|
|
colorValue->GetUnit() == eCSSUnit_Null) {
|
|
colorValue->SetColorValue(color);
|
|
}
|
|
}
|
|
|
|
if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Position)) {
|
|
// 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
|
|
//
|
|
nsCSSValue* width = aData->ValueForWidth();
|
|
if (width->GetUnit() == eCSSUnit_Null) {
|
|
const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::width);
|
|
// This does not handle auto and unitless values
|
|
if (value && value->Type() == nsAttrValue::eString) {
|
|
ParseNumericValue(value->GetStringValue(), *width, 0,
|
|
aData->mPresContext->Document());
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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
|
|
//
|
|
if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Visibility)) {
|
|
const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::dir);
|
|
nsCSSValue* direction = aData->ValueForDirection();
|
|
if (value && value->Type() == nsAttrValue::eString &&
|
|
direction->GetUnit() == eCSSUnit_Null) {
|
|
nsAutoString str(value->GetStringValue());
|
|
static const char dirs[][4] = { "ltr", "rtl" };
|
|
static const int32_t dirValues[MOZ_ARRAY_LENGTH(dirs)] = {
|
|
NS_STYLE_DIRECTION_LTR, NS_STYLE_DIRECTION_RTL
|
|
};
|
|
for (uint32_t i = 0; i < ArrayLength(dirs); ++i) {
|
|
if (str.EqualsASCII(dirs[i])) {
|
|
direction->SetIntValue(dirValues[i], eCSSUnit_Enumerated);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsMathMLElement::PreHandleEvent(EventChainPreVisitor& aVisitor)
|
|
{
|
|
nsresult rv = Element::PreHandleEvent(aVisitor);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return PreHandleEventForLinks(aVisitor);
|
|
}
|
|
|
|
nsresult
|
|
nsMathMLElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
|
|
{
|
|
return PostHandleEventForLinks(aVisitor);
|
|
}
|
|
|
|
NS_IMPL_ELEMENT_CLONE(nsMathMLElement)
|
|
|
|
EventStates
|
|
nsMathMLElement::IntrinsicState() const
|
|
{
|
|
return Link::LinkState() | nsMathMLElementBase::IntrinsicState() |
|
|
(mIncrementScriptLevel ?
|
|
NS_EVENT_STATE_INCREMENT_SCRIPT_LEVEL : EventStates());
|
|
}
|
|
|
|
bool
|
|
nsMathMLElement::IsNodeOfType(uint32_t aFlags) const
|
|
{
|
|
return !(aFlags & ~eCONTENT);
|
|
}
|
|
|
|
void
|
|
nsMathMLElement::SetIncrementScriptLevel(bool aIncrementScriptLevel,
|
|
bool aNotify)
|
|
{
|
|
if (aIncrementScriptLevel == mIncrementScriptLevel)
|
|
return;
|
|
mIncrementScriptLevel = aIncrementScriptLevel;
|
|
|
|
NS_ASSERTION(aNotify, "We always notify!");
|
|
|
|
UpdateState(true);
|
|
}
|
|
|
|
bool
|
|
nsMathMLElement::IsFocusableInternal(int32_t* aTabIndex, bool aWithMouse)
|
|
{
|
|
nsCOMPtr<nsIURI> uri;
|
|
if (IsLink(getter_AddRefs(uri))) {
|
|
if (aTabIndex) {
|
|
*aTabIndex = ((sTabFocusModel & eTabFocus_linksMask) == 0 ? -1 : 0);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (aTabIndex) {
|
|
*aTabIndex = -1;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
nsMathMLElement::IsLink(nsIURI** aURI) const
|
|
{
|
|
// http://www.w3.org/TR/2010/REC-MathML3-20101021/chapter6.html#interf.link
|
|
// The REC says that the following elements should not be linking elements:
|
|
if (IsAnyOfMathMLElements(nsGkAtoms::mprescripts_, nsGkAtoms::none,
|
|
nsGkAtoms::malignmark_, nsGkAtoms::maligngroup_)) {
|
|
*aURI = nullptr;
|
|
return false;
|
|
}
|
|
|
|
bool hasHref = false;
|
|
const nsAttrValue* href = mAttrsAndChildren.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 {
|
|
// 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 nsIContent::AttrValuesArray sTypeVals[] =
|
|
{ &nsGkAtoms::_empty, &nsGkAtoms::simple, nullptr };
|
|
|
|
static nsIContent::AttrValuesArray sShowVals[] =
|
|
{ &nsGkAtoms::_empty, &nsGkAtoms::_new, &nsGkAtoms::replace, nullptr };
|
|
|
|
static nsIContent::AttrValuesArray sActuateVals[] =
|
|
{ &nsGkAtoms::_empty, &nsGkAtoms::onRequest, nullptr };
|
|
|
|
// Optimization: check for href first for early return
|
|
href = mAttrsAndChildren.GetAttr(nsGkAtoms::href,
|
|
kNameSpaceID_XLink);
|
|
if (href &&
|
|
FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::type,
|
|
sTypeVals, eCaseMatters) !=
|
|
nsIContent::ATTR_VALUE_NO_MATCH &&
|
|
FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show,
|
|
sShowVals, eCaseMatters) !=
|
|
nsIContent::ATTR_VALUE_NO_MATCH &&
|
|
FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::actuate,
|
|
sActuateVals, eCaseMatters) !=
|
|
nsIContent::ATTR_VALUE_NO_MATCH) {
|
|
hasHref = true;
|
|
}
|
|
}
|
|
|
|
if (hasHref) {
|
|
nsCOMPtr<nsIURI> baseURI = GetBaseURI();
|
|
// Get absolute URI
|
|
nsAutoString hrefStr;
|
|
href->ToString(hrefStr);
|
|
nsContentUtils::NewURIWithDocumentCharset(aURI, hrefStr,
|
|
OwnerDoc(), baseURI);
|
|
// must promise out param is non-null if we return true
|
|
return !!*aURI;
|
|
}
|
|
|
|
*aURI = nullptr;
|
|
return false;
|
|
}
|
|
|
|
void
|
|
nsMathMLElement::GetLinkTarget(nsAString& aTarget)
|
|
{
|
|
const nsAttrValue* target = mAttrsAndChildren.GetAttr(nsGkAtoms::target,
|
|
kNameSpaceID_XLink);
|
|
if (target) {
|
|
target->ToString(aTarget);
|
|
}
|
|
|
|
if (aTarget.IsEmpty()) {
|
|
|
|
static nsIContent::AttrValuesArray sShowVals[] =
|
|
{ &nsGkAtoms::_new, &nsGkAtoms::replace, nullptr };
|
|
|
|
switch (FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show,
|
|
sShowVals, eCaseMatters)) {
|
|
case 0:
|
|
aTarget.AssignLiteral("_blank");
|
|
return;
|
|
case 1:
|
|
return;
|
|
}
|
|
OwnerDoc()->GetBaseTarget(aTarget);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<nsIURI>
|
|
nsMathMLElement::GetHrefURI() const
|
|
{
|
|
nsCOMPtr<nsIURI> hrefURI;
|
|
return IsLink(getter_AddRefs(hrefURI)) ? hrefURI.forget() : nullptr;
|
|
}
|
|
|
|
nsresult
|
|
nsMathMLElement::SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
|
|
nsIAtom* aPrefix, const nsAString& aValue,
|
|
bool aNotify)
|
|
{
|
|
nsresult rv = nsMathMLElementBase::SetAttr(aNameSpaceID, aName, aPrefix,
|
|
aValue, aNotify);
|
|
|
|
// The ordering of the parent class's SetAttr call and Link::ResetLinkState
|
|
// is important here! The attribute is not set until SetAttr returns, and
|
|
// 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 ||
|
|
aNameSpaceID == kNameSpaceID_XLink)) {
|
|
if (aNameSpaceID == kNameSpaceID_XLink) {
|
|
WarnDeprecated(MOZ_UTF16("xlink:href"),
|
|
MOZ_UTF16("href"), OwnerDoc());
|
|
}
|
|
Link::ResetLinkState(!!aNotify, true);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsMathMLElement::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttr,
|
|
bool aNotify)
|
|
{
|
|
nsresult rv = nsMathMLElementBase::UnsetAttr(aNameSpaceID, aAttr, aNotify);
|
|
|
|
// The ordering of the parent class's UnsetAttr call and Link::ResetLinkState
|
|
// is important here! The attribute is not unset until UnsetAttr returns, and
|
|
// 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 (aAttr == nsGkAtoms::href &&
|
|
(aNameSpaceID == kNameSpaceID_None ||
|
|
aNameSpaceID == kNameSpaceID_XLink)) {
|
|
// Note: just because we removed a single href attr doesn't mean there's no href,
|
|
// since there are 2 possible namespaces.
|
|
Link::ResetLinkState(!!aNotify, Link::ElementHasHref());
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
JSObject*
|
|
nsMathMLElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
|
|
{
|
|
return ElementBinding::Wrap(aCx, this, aGivenProto);
|
|
}
|