https://bugs.webkit.org/show_bug.cgi?id=77800

Reviewed by Ryosuke Niwa.

Source/WebCore:

Reduce the clients of NamedNodeMap. This will make easier to change the
implementation of our attribute storage. The clients now use Element methods
that expose Attribute* accessors.

Instead of checking the existence of NamedNodeMap, clients can call
hasAttributes() or hasAttributesWithoutUpdate() (that skips updating invalid
style or animation svg attributes).

If there are attributes, they can be accessed by index via attributeCount() /
attributeItem(), as well as by QualifiedName. Those accessors assume there are an
attribute storage.

* css/SelectorChecker.cpp:
(WebCore::anyAttributeMatches):
(WebCore::SelectorChecker::checkOneSelector):
* css/SelectorChecker.h:
(WebCore::SelectorChecker::checkExactAttribute):
* dom/DatasetDOMStringMap.cpp:
(WebCore::DatasetDOMStringMap::getNames):
(WebCore::DatasetDOMStringMap::item):
(WebCore::DatasetDOMStringMap::contains):
* dom/Document.cpp:
(WebCore::Document::importNode): use setAttributesFromElement() instead of manually copying.
* dom/Element.h:
(Element):
(WebCore::Element::hasAttributesWithoutUpdate):
(WebCore):
(WebCore::Element::attributeCount):
(WebCore::Element::attributeItem):
(WebCore::Element::getAttributeItem):
(WebCore::Element::removeAttribute):
* dom/Node.cpp:
(WebCore::Node::isDefaultNamespace):
(WebCore::Node::lookupNamespaceURI):
(WebCore::Node::lookupNamespacePrefix):
(WebCore::Node::compareDocumentPosition):
* editing/ApplyStyleCommand.cpp:
(WebCore::hasNoAttributeOrOnlyStyleAttribute):
(WebCore::isEmptyFontTag):
* editing/EditingStyle.cpp:
(WebCore::EditingStyle::elementIsStyledSpanOrHTMLEquivalent):
* editing/InsertParagraphSeparatorCommand.cpp:
(WebCore::highestVisuallyEquivalentDivBelowRoot):
* editing/MarkupAccumulator.cpp:
(WebCore::MarkupAccumulator::appendElement):
* editing/markup.cpp:
(WebCore::completeURLs):
(WebCore::StyledMarkupAccumulator::appendElement):
* html/HTMLEmbedElement.cpp:
(WebCore::HTMLEmbedElement::parametersForPlugin):
* html/HTMLInputElement.cpp:
(WebCore::HTMLInputElement::updateType):
* html/HTMLObjectElement.cpp:
(WebCore::HTMLObjectElement::parametersForPlugin):
* html/HTMLParamElement.cpp:
(WebCore::HTMLParamElement::isURLAttribute):
* html/parser/HTMLFormattingElementList.cpp:
(WebCore::attributeCountWithoutUpdate):
(WebCore::HTMLFormattingElementList::tryToEnsureNoahsArkConditionQuickly):
(WebCore::HTMLFormattingElementList::ensureNoahsArkCondition): Store Attribute*
to avoid looking up the right element again by name.
* inspector/DOMEditor.cpp:
(WebCore::DOMEditor::innerPatchNode):
(WebCore::DOMEditor::createDigest):
* inspector/InspectorDOMAgent.cpp:
(WebCore::InspectorDOMAgent::setAttributesAsText):
(WebCore::InspectorDOMAgent::performSearch):
(WebCore::InspectorDOMAgent::buildArrayForElementAttributes):
* page/PageSerializer.cpp:
(WebCore::isCharsetSpecifyingNode):
* svg/SVGStyledElement.cpp:
(WebCore::SVGStyledElement::getPresentationAttribute):
* xml/XPathFunctions.cpp:
(WebCore::XPath::FunLang::evaluate):
* xml/XPathNodeSet.cpp:
(WebCore::XPath::NodeSet::traversalSort):
* xml/XPathStep.cpp:
(WebCore::XPath::Step::nodesInAxis):
* xml/parser/XMLDocumentParserLibxml2.cpp:
(WebCore::XMLDocumentParser::XMLDocumentParser):
* xml/parser/XMLTreeBuilder.cpp:
(WebCore::XMLTreeBuilder::XMLTreeBuilder):

Source/WebKit/chromium:

* src/WebPageSerializerImpl.cpp:
(WebKit::WebPageSerializerImpl::openTagToString): access attributes via Element interface.

Source/WebKit/qt:

* Api/qwebelement.cpp:
(QWebElement::attributeNames): access attributes via Element interface.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@106833 268f45cc-cd09-0410-ab3c-d52691b4dbfc