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Diffstat (limited to 'WebCore/html/HTMLParser.cpp')
| -rw-r--r-- | WebCore/html/HTMLParser.cpp | 1602 |
1 files changed, 0 insertions, 1602 deletions
diff --git a/WebCore/html/HTMLParser.cpp b/WebCore/html/HTMLParser.cpp deleted file mode 100644 index ba2220c..0000000 --- a/WebCore/html/HTMLParser.cpp +++ /dev/null @@ -1,1602 +0,0 @@ -/* - Copyright (C) 1997 Martin Jones (mjones@kde.org) - (C) 1997 Torben Weis (weis@kde.org) - (C) 1999,2001 Lars Knoll (knoll@kde.org) - (C) 2000,2001 Dirk Mueller (mueller@kde.org) - Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public - License as published by the Free Software Foundation; either - version 2 of the License, or (at your option) any later version. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public License - along with this library; see the file COPYING.LIB. If not, write to - the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. -*/ - -#include "config.h" -#include "HTMLParser.h" - -#include "CharacterNames.h" -#include "CSSPropertyNames.h" -#include "CSSValueKeywords.h" -#include "Comment.h" -#include "Console.h" -#include "DOMWindow.h" -#include "DocumentFragment.h" -#include "DocumentType.h" -#include "Frame.h" -#include "HTMLBodyElement.h" -#include "HTMLDocument.h" -#include "HTMLDivElement.h" -#include "HTMLDListElement.h" -#include "HTMLElementFactory.h" -#include "HTMLFormElement.h" -#include "HTMLHeadElement.h" -#include "HTMLHRElement.h" -#include "HTMLHtmlElement.h" -#include "HTMLIsIndexElement.h" -#include "HTMLMapElement.h" -#include "HTMLNames.h" -#include "HTMLTableCellElement.h" -#include "HTMLTableRowElement.h" -#include "HTMLTableSectionElement.h" -#include "HTMLTokenizer.h" -#include "LocalizedStrings.h" -#include "Settings.h" -#include "Text.h" - -namespace WebCore { - -using namespace HTMLNames; - -static const unsigned cMaxRedundantTagDepth = 20; -static const unsigned cResidualStyleMaxDepth = 200; - -struct HTMLStackElem : Noncopyable { - HTMLStackElem(const AtomicString& t, int lvl, Node* n, bool r, HTMLStackElem* nx) - : tagName(t) - , level(lvl) - , strayTableContent(false) - , node(n) - , didRefNode(r) - , next(nx) - { - } - - void derefNode() - { - if (didRefNode) - node->deref(); - } - - AtomicString tagName; - int level; - bool strayTableContent; - Node* node; - bool didRefNode; - HTMLStackElem* next; -}; - -/** - * The parser parses tokenized input into the document, building up the - * document tree. If the document is well-formed, parsing it is straightforward. - * - * Unfortunately, we have to handle many HTML documents that are not well-formed, - * so the parser has to be tolerant about errors. - * - * We have to take care of at least the following error conditions: - * - * 1. The element being added is explicitly forbidden inside some outer tag. - * In this case we should close all tags up to the one, which forbids - * the element, and add it afterwards. - * - * 2. We are not allowed to add the element directly. It could be that - * the person writing the document forgot some tag in between (or that the - * tag in between is optional). This could be the case with the following - * tags: HTML HEAD BODY TBODY TR TD LI (did I forget any?). - * - * 3. We want to add a block element inside to an inline element. Close all - * inline elements up to the next higher block element. - * - * 4. If this doesn't help, close elements until we are allowed to add the - * element or ignore the tag. - * - */ - -HTMLParser::HTMLParser(HTMLDocument* doc, bool reportErrors) - : document(doc) - , current(doc) - , didRefCurrent(false) - , blockStack(0) - , m_hasPElementInScope(NotInScope) - , head(0) - , inBody(false) - , haveContent(false) - , haveFrameSet(false) - , m_isParsingFragment(false) - , m_reportErrors(reportErrors) - , m_handlingResidualStyleAcrossBlocks(false) - , inStrayTableContent(0) -{ -} - -HTMLParser::HTMLParser(DocumentFragment* frag) - : document(frag->document()) - , current(frag) - , didRefCurrent(true) - , blockStack(0) - , m_hasPElementInScope(NotInScope) - , head(0) - , inBody(true) - , haveContent(false) - , haveFrameSet(false) - , m_isParsingFragment(true) - , m_reportErrors(false) - , m_handlingResidualStyleAcrossBlocks(false) - , inStrayTableContent(0) -{ - if (frag) - frag->ref(); -} - -HTMLParser::~HTMLParser() -{ - freeBlock(); - if (didRefCurrent) - current->deref(); -} - -void HTMLParser::reset() -{ - ASSERT(!m_isParsingFragment); - - setCurrent(document); - - freeBlock(); - - inBody = false; - haveFrameSet = false; - haveContent = false; - inStrayTableContent = 0; - - m_currentFormElement = 0; - m_currentMapElement = 0; - head = 0; - m_isindexElement = 0; - - m_skipModeTag = nullAtom; -} - -void HTMLParser::setCurrent(Node* newCurrent) -{ - bool didRefNewCurrent = newCurrent && newCurrent != document; - if (didRefNewCurrent) - newCurrent->ref(); - if (didRefCurrent) - current->deref(); - current = newCurrent; - didRefCurrent = didRefNewCurrent; -} - -PassRefPtr<Node> HTMLParser::parseToken(Token* t) -{ - if (!m_skipModeTag.isNull()) { - if (!t->beginTag && t->tagName == m_skipModeTag) - // Found the end tag for the current skip mode, so we're done skipping. - m_skipModeTag = nullAtom; - else if (current->localName() == t->tagName) - // Do not skip </iframe>. - // FIXME: What does that comment mean? How can it be right to parse a token without clearing m_skipModeTag? - ; - else - return 0; - } - - // Apparently some sites use </br> instead of <br>. Be compatible with IE and Firefox and treat this like <br>. - if (t->isCloseTag(brTag) && document->inCompatMode()) { - reportError(MalformedBRError); - t->beginTag = true; - } - - if (!t->beginTag) { - processCloseTag(t); - return 0; - } - - // Ignore spaces, if we're not inside a paragraph or other inline code. - // Do not alter the text if it is part of a scriptTag. - if (t->tagName == textAtom && t->text && current->localName() != scriptTag) { - if (inBody && !skipMode() && current->localName() != styleTag && - current->localName() != titleTag && !t->text->containsOnlyWhitespace()) - haveContent = true; - - RefPtr<Node> n; - String text = t->text.get(); - unsigned charsLeft = text.length(); - while (charsLeft) { - // split large blocks of text to nodes of manageable size - n = Text::createWithLengthLimit(document, text, charsLeft); - if (!insertNode(n.get(), t->flat)) - return 0; - } - return n; - } - - RefPtr<Node> n = getNode(t); - // just to be sure, and to catch currently unimplemented stuff - if (!n) - return 0; - - // set attributes - if (n->isHTMLElement()) { - HTMLElement* e = static_cast<HTMLElement*>(n.get()); - e->setAttributeMap(t->attrs.get()); - - // take care of optional close tags - if (e->endTagRequirement() == TagStatusOptional) - popBlock(t->tagName); - - // If the node does not have a forbidden end tag requirement, and if the broken XML self-closing - // syntax was used, report an error. - if (t->brokenXMLStyle && e->endTagRequirement() != TagStatusForbidden) { - if (t->tagName == scriptTag) - reportError(IncorrectXMLCloseScriptWarning); - else - reportError(IncorrectXMLSelfCloseError, &t->tagName); - } - } - - if (!insertNode(n.get(), t->flat)) { - // we couldn't insert the node - - if (n->isElementNode()) { - Element* e = static_cast<Element*>(n.get()); - e->setAttributeMap(0); - } - - if (m_currentMapElement == n) - m_currentMapElement = 0; - - if (m_currentFormElement == n) - m_currentFormElement = 0; - - if (head == n) - head = 0; - - return 0; - } - return n; -} - -void HTMLParser::parseDoctypeToken(DoctypeToken* t) -{ - // Ignore any doctype after the first. Ignore doctypes in fragments. - if (document->doctype() || m_isParsingFragment || current != document) - return; - - // Make a new doctype node and set it as our doctype. - document->addChild(DocumentType::create(document, String::adopt(t->m_name), String::adopt(t->m_publicID), String::adopt(t->m_systemID))); -} - -static bool isTableSection(Node* n) -{ - return n->hasTagName(tbodyTag) || n->hasTagName(tfootTag) || n->hasTagName(theadTag); -} - -static bool isTablePart(Node* n) -{ - return n->hasTagName(trTag) || n->hasTagName(tdTag) || n->hasTagName(thTag) || - isTableSection(n); -} - -static bool isTableRelated(Node* n) -{ - return n->hasTagName(tableTag) || isTablePart(n); -} - -static bool isScopingTag(const AtomicString& tagName) -{ - return tagName == appletTag || tagName == captionTag || tagName == tdTag || tagName == thTag || tagName == buttonTag || tagName == marqueeTag || tagName == objectTag || tagName == tableTag || tagName == htmlTag; -} - -bool HTMLParser::insertNode(Node* n, bool flat) -{ - RefPtr<Node> protectNode(n); - - const AtomicString& localName = n->localName(); - int tagPriority = n->isHTMLElement() ? static_cast<HTMLElement*>(n)->tagPriority() : 0; - - // <table> is never allowed inside stray table content. Always pop out of the stray table content - // and close up the first table, and then start the second table as a sibling. - if (inStrayTableContent && localName == tableTag) - popBlock(tableTag); - - // let's be stupid and just try to insert it. - // this should work if the document is well-formed - Node* newNode = current->addChild(n); - if (!newNode) - return handleError(n, flat, localName, tagPriority); // Try to handle the error. - - // don't push elements without end tags (e.g., <img>) on the stack - bool parentAttached = current->attached(); - if (tagPriority > 0 && !flat) { - if (newNode == current) { - // This case should only be hit when a demoted <form> is placed inside a table. - ASSERT(localName == formTag); - reportError(FormInsideTablePartError, ¤t->localName()); - } else { - // The pushBlock function transfers ownership of current to the block stack - // so we're guaranteed that didRefCurrent is false. The code below is an - // optimized version of setCurrent that takes advantage of that fact and also - // assumes that newNode is neither 0 nor a pointer to the document. - pushBlock(localName, tagPriority); - newNode->beginParsingChildren(); - ASSERT(!didRefCurrent); - newNode->ref(); - current = newNode; - didRefCurrent = true; - } - if (parentAttached && !n->attached() && !m_isParsingFragment) - n->attach(); - } else { - if (parentAttached && !n->attached() && !m_isParsingFragment) - n->attach(); - n->finishParsingChildren(); - } - - return true; -} - -bool HTMLParser::handleError(Node* n, bool flat, const AtomicString& localName, int tagPriority) -{ - // Error handling code. This is just ad hoc handling of specific parent/child combinations. - HTMLElement* e; - bool handled = false; - - // 1. Check out the element's tag name to decide how to deal with errors. - if (n->isHTMLElement()) { - HTMLElement* h = static_cast<HTMLElement*>(n); - if (h->hasLocalName(trTag) || h->hasLocalName(thTag) || h->hasLocalName(tdTag)) { - if (inStrayTableContent && !isTableRelated(current)) { - reportError(MisplacedTablePartError, &localName, ¤t->localName()); - // pop out to the nearest enclosing table-related tag. - while (blockStack && !isTableRelated(current)) - popOneBlock(); - return insertNode(n); - } - } else if (h->hasLocalName(headTag)) { - if (!current->isDocumentNode() && !current->hasTagName(htmlTag)) { - reportError(MisplacedHeadError); - return false; - } - } else if (h->hasLocalName(metaTag) || h->hasLocalName(linkTag) || h->hasLocalName(baseTag)) { - bool createdHead = false; - if (!head) { - createHead(); - createdHead = true; - } - if (head) { - if (!createdHead) - reportError(MisplacedHeadContentError, &localName, ¤t->localName()); - if (head->addChild(n)) { - if (!n->attached() && !m_isParsingFragment) - n->attach(); - return true; - } else - return false; - } - } else if (h->hasLocalName(htmlTag)) { - if (!current->isDocumentNode() ) { - if (document->documentElement() && document->documentElement()->hasTagName(htmlTag)) { - reportError(RedundantHTMLBodyError, &localName); - // we have another <HTML> element.... apply attributes to existing one - // make sure we don't overwrite already existing attributes - NamedAttrMap* map = static_cast<Element*>(n)->attributes(true); - Element* existingHTML = static_cast<Element*>(document->documentElement()); - NamedAttrMap* bmap = existingHTML->attributes(false); - for (unsigned l = 0; map && l < map->length(); ++l) { - Attribute* it = map->attributeItem(l); - if (!bmap->getAttributeItem(it->name())) - existingHTML->setAttribute(it->name(), it->value()); - } - } - return false; - } - } else if (h->hasLocalName(titleTag) || h->hasLocalName(styleTag)) { - bool createdHead = false; - if (!head) { - createHead(); - createdHead = true; - } - if (head) { - Node* newNode = head->addChild(n); - if (!newNode) { - setSkipMode(h->tagQName()); - return false; - } - - if (!createdHead) - reportError(MisplacedHeadContentError, &localName, ¤t->localName()); - - pushBlock(localName, tagPriority); - newNode->beginParsingChildren(); - setCurrent(newNode); - if (!n->attached() && !m_isParsingFragment) - n->attach(); - return true; - } - if (inBody) { - setSkipMode(h->tagQName()); - return false; - } - } else if (h->hasLocalName(bodyTag)) { - if (inBody && document->body()) { - // we have another <BODY> element.... apply attributes to existing one - // make sure we don't overwrite already existing attributes - // some sites use <body bgcolor=rightcolor>...<body bgcolor=wrongcolor> - reportError(RedundantHTMLBodyError, &localName); - NamedAttrMap* map = static_cast<Element*>(n)->attributes(true); - Element* existingBody = document->body(); - NamedAttrMap* bmap = existingBody->attributes(false); - for (unsigned l = 0; map && l < map->length(); ++l) { - Attribute* it = map->attributeItem(l); - if (!bmap->getAttributeItem(it->name())) - existingBody->setAttribute(it->name(), it->value()); - } - return false; - } - else if (!current->isDocumentNode()) - return false; - } else if (h->hasLocalName(areaTag)) { - if (m_currentMapElement) { - reportError(MisplacedAreaError, ¤t->localName()); - m_currentMapElement->addChild(n); - if (!n->attached() && !m_isParsingFragment) - n->attach(); - handled = true; - return true; - } - return false; - } else if (h->hasLocalName(colgroupTag) || h->hasLocalName(captionTag)) { - if (isTableRelated(current)) { - while (blockStack && isTablePart(current)) - popOneBlock(); - return insertNode(n); - } - } - } else if (n->isCommentNode() && !head) - return false; - - // 2. Next we examine our currently active element to do some further error handling. - if (current->isHTMLElement()) { - HTMLElement* h = static_cast<HTMLElement*>(current); - const AtomicString& currentTagName = h->localName(); - if (h->hasLocalName(htmlTag)) { - HTMLElement* elt = n->isHTMLElement() ? static_cast<HTMLElement*>(n) : 0; - if (elt && (elt->hasLocalName(scriptTag) || elt->hasLocalName(styleTag) || - elt->hasLocalName(metaTag) || elt->hasLocalName(linkTag) || - elt->hasLocalName(objectTag) || elt->hasLocalName(embedTag) || - elt->hasLocalName(titleTag) || elt->hasLocalName(isindexTag) || - elt->hasLocalName(baseTag))) { - if (!head) { - head = new HTMLHeadElement(document); - e = head; - insertNode(e); - handled = true; - } - } else { - if (n->isTextNode()) { - Text* t = static_cast<Text*>(n); - if (t->containsOnlyWhitespace()) - return false; - } - if (!haveFrameSet) { - e = new HTMLBodyElement(document); - startBody(); - insertNode(e); - handled = true; - } else - reportError(MisplacedFramesetContentError, &localName); - } - } else if (h->hasLocalName(headTag)) { - if (n->hasTagName(htmlTag)) - return false; - else { - // This means the body starts here... - if (!haveFrameSet) { - popBlock(currentTagName); - e = new HTMLBodyElement(document); - startBody(); - insertNode(e); - handled = true; - } else - reportError(MisplacedFramesetContentError, &localName); - } - } else if (h->hasLocalName(addressTag) || h->hasLocalName(fontTag) - || h->hasLocalName(styleTag) || h->hasLocalName(titleTag)) { - reportError(MisplacedContentRetryError, &localName, ¤tTagName); - popBlock(currentTagName); - handled = true; - } else if (h->hasLocalName(captionTag)) { - // Illegal content in a caption. Close the caption and try again. - reportError(MisplacedCaptionContentError, &localName); - popBlock(currentTagName); - if (isTablePart(n)) - return insertNode(n, flat); - } else if (h->hasLocalName(tableTag) || h->hasLocalName(trTag) || isTableSection(h)) { - if (n->hasTagName(tableTag)) { - reportError(MisplacedTableError, ¤tTagName); - if (m_isParsingFragment && !h->hasLocalName(tableTag)) - // fragment may contain table parts without <table> ancestor, pop them one by one - popBlock(h->localName()); - popBlock(localName); // end the table - handled = true; // ...and start a new one - } else { - ExceptionCode ec = 0; - Node* node = current; - Node* parent = node->parentNode(); - // A script may have removed the current node's parent from the DOM - // http://bugs.webkit.org/show_bug.cgi?id=7137 - // FIXME: we should do real recovery here and re-parent with the correct node. - if (!parent) - return false; - Node* grandparent = parent->parentNode(); - - if (n->isTextNode() || - (h->hasLocalName(trTag) && - isTableSection(parent) && grandparent && grandparent->hasTagName(tableTag)) || - ((!n->hasTagName(tdTag) && !n->hasTagName(thTag) && - !n->hasTagName(formTag) && !n->hasTagName(scriptTag)) && isTableSection(node) && - parent->hasTagName(tableTag))) { - node = (node->hasTagName(tableTag)) ? node : - ((node->hasTagName(trTag)) ? grandparent : parent); - // This can happen with fragments - if (!node) - return false; - Node* parent = node->parentNode(); - if (!parent) - return false; - parent->insertBefore(n, node, ec); - if (!ec) { - reportError(StrayTableContentError, &localName, ¤tTagName); - if (n->isHTMLElement() && tagPriority > 0 && - !flat && static_cast<HTMLElement*>(n)->endTagRequirement() != TagStatusForbidden) - { - pushBlock(localName, tagPriority); - n->beginParsingChildren(); - setCurrent(n); - inStrayTableContent++; - blockStack->strayTableContent = true; - } - return true; - } - } - - if (!ec) { - if (current->hasTagName(trTag)) { - reportError(TablePartRequiredError, &localName, &tdTag.localName()); - e = new HTMLTableCellElement(tdTag, document); - } else if (current->hasTagName(tableTag)) { - // Don't report an error in this case, since making a <tbody> happens all the time when you have <table><tr>, - // and it isn't really a parse error per se. - e = new HTMLTableSectionElement(tbodyTag, document); - } else { - reportError(TablePartRequiredError, &localName, &trTag.localName()); - e = new HTMLTableRowElement(document); - } - - insertNode(e); - handled = true; - } - } - } else if (h->hasLocalName(objectTag)) { - reportError(MisplacedContentRetryError, &localName, ¤tTagName); - popBlock(objectTag); - handled = true; - } else if (h->hasLocalName(pTag) || isHeaderTag(currentTagName)) { - if (!isInline(n)) { - popBlock(currentTagName); - handled = true; - } - } else if (h->hasLocalName(optionTag) || h->hasLocalName(optgroupTag)) { - if (localName == optgroupTag) { - popBlock(currentTagName); - handled = true; - } else if (localName == selectTag) { - // IE treats a nested select as </select>. Let's do the same - popBlock(localName); - } - } else if (h->hasLocalName(selectTag)) { - if (localName == inputTag || localName == textareaTag) { - reportError(MisplacedContentRetryError, &localName, ¤tTagName); - popBlock(currentTagName); - handled = true; - } - } else if (h->hasLocalName(colgroupTag)) { - popBlock(currentTagName); - handled = true; - } else if (!h->hasLocalName(bodyTag)) { - if (isInline(current)) { - popInlineBlocks(); - handled = true; - } - } - } else if (current->isDocumentNode()) { - if (n->isTextNode()) { - Text* t = static_cast<Text*>(n); - if (t->containsOnlyWhitespace()) - return false; - } - - if (!document->documentElement()) { - e = new HTMLHtmlElement(document); - insertNode(e); - handled = true; - } - } - - // 3. If we couldn't handle the error, just return false and attempt to error-correct again. - if (!handled) { - reportError(IgnoredContentError, &localName, ¤t->localName()); - return false; - } - return insertNode(n); -} - -typedef bool (HTMLParser::*CreateErrorCheckFunc)(Token* t, RefPtr<Node>&); -typedef HashMap<AtomicStringImpl*, CreateErrorCheckFunc> FunctionMap; - -bool HTMLParser::textCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - result = new Text(document, t->text.get()); - return false; -} - -bool HTMLParser::commentCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - result = new Comment(document, t->text.get()); - return false; -} - -bool HTMLParser::headCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - if (!head || current->localName() == htmlTag) { - head = new HTMLHeadElement(document); - result = head; - } else - reportError(MisplacedHeadError); - return false; -} - -bool HTMLParser::bodyCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - // body no longer allowed if we have a frameset - if (haveFrameSet) - return false; - popBlock(headTag); - startBody(); - return true; -} - -bool HTMLParser::framesetCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - popBlock(headTag); - if (inBody && !haveFrameSet && !haveContent) { - popBlock(bodyTag); - // ### actually for IE document.body returns the now hidden "body" element - // we can't implement that behaviour now because it could cause too many - // regressions and the headaches are not worth the work as long as there is - // no site actually relying on that detail (Dirk) - if (document->body()) - document->body()->setAttribute(styleAttr, "display:none"); - inBody = false; - } - if ((haveContent || haveFrameSet) && current->localName() == htmlTag) - return false; - haveFrameSet = true; - startBody(); - return true; -} - -bool HTMLParser::formCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - // Only create a new form if we're not already inside one. - // This is consistent with other browsers' behavior. - if (!m_currentFormElement) { - m_currentFormElement = new HTMLFormElement(document); - result = m_currentFormElement; - pCloserCreateErrorCheck(t, result); - } - return false; -} - -bool HTMLParser::isindexCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - RefPtr<Node> n = handleIsindex(t); - if (!inBody) { - m_isindexElement = n.release(); - } else { - t->flat = true; - result = n.release(); - } - return false; -} - -bool HTMLParser::selectCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - return true; -} - -bool HTMLParser::ddCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - pCloserCreateErrorCheck(t, result); - popBlock(dtTag); - popBlock(ddTag); - return true; -} - -bool HTMLParser::dtCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - pCloserCreateErrorCheck(t, result); - popBlock(ddTag); - popBlock(dtTag); - return true; -} - -bool HTMLParser::nestedCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - popBlock(t->tagName); - return true; -} - -bool HTMLParser::nestedPCloserCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - pCloserCreateErrorCheck(t, result); - popBlock(t->tagName); - return true; -} - -bool HTMLParser::nestedStyleCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - return allowNestedRedundantTag(t->tagName); -} - -bool HTMLParser::tableCellCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - popBlock(tdTag); - popBlock(thTag); - return true; -} - -bool HTMLParser::tableSectionCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - popBlock(theadTag); - popBlock(tbodyTag); - popBlock(tfootTag); - return true; -} - -bool HTMLParser::noembedCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - setSkipMode(noembedTag); - return true; -} - -bool HTMLParser::noframesCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - setSkipMode(noframesTag); - return true; -} - -bool HTMLParser::noscriptCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - if (!m_isParsingFragment) { - Settings* settings = document->settings(); - if (settings && settings->isJavaScriptEnabled()) - setSkipMode(noscriptTag); - } - return true; -} - -bool HTMLParser::pCloserCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - if (hasPElementInScope()) - popBlock(pTag); - return true; -} - -bool HTMLParser::pCloserStrictCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - if (document->inCompatMode()) - return true; - if (hasPElementInScope()) - popBlock(pTag); - return true; -} - -bool HTMLParser::mapCreateErrorCheck(Token* t, RefPtr<Node>& result) -{ - m_currentMapElement = new HTMLMapElement(document); - result = m_currentMapElement; - return false; -} - -PassRefPtr<Node> HTMLParser::getNode(Token* t) -{ - // Init our error handling table. - static FunctionMap gFunctionMap; - if (gFunctionMap.isEmpty()) { - gFunctionMap.set(aTag.localName().impl(), &HTMLParser::nestedCreateErrorCheck); - gFunctionMap.set(addressTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(bTag.localName().impl(), &HTMLParser::nestedStyleCreateErrorCheck); - gFunctionMap.set(bigTag.localName().impl(), &HTMLParser::nestedStyleCreateErrorCheck); - gFunctionMap.set(blockquoteTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(bodyTag.localName().impl(), &HTMLParser::bodyCreateErrorCheck); - gFunctionMap.set(buttonTag.localName().impl(), &HTMLParser::nestedCreateErrorCheck); - gFunctionMap.set(centerTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(commentAtom.impl(), &HTMLParser::commentCreateErrorCheck); - gFunctionMap.set(ddTag.localName().impl(), &HTMLParser::ddCreateErrorCheck); - gFunctionMap.set(dirTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(divTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(dlTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(dtTag.localName().impl(), &HTMLParser::dtCreateErrorCheck); - gFunctionMap.set(formTag.localName().impl(), &HTMLParser::formCreateErrorCheck); - gFunctionMap.set(fieldsetTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(framesetTag.localName().impl(), &HTMLParser::framesetCreateErrorCheck); - gFunctionMap.set(h1Tag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(h2Tag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(h3Tag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(h4Tag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(h5Tag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(h6Tag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(headTag.localName().impl(), &HTMLParser::headCreateErrorCheck); - gFunctionMap.set(hrTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(iTag.localName().impl(), &HTMLParser::nestedStyleCreateErrorCheck); - gFunctionMap.set(isindexTag.localName().impl(), &HTMLParser::isindexCreateErrorCheck); - gFunctionMap.set(liTag.localName().impl(), &HTMLParser::nestedPCloserCreateErrorCheck); - gFunctionMap.set(listingTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(mapTag.localName().impl(), &HTMLParser::mapCreateErrorCheck); - gFunctionMap.set(menuTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(nobrTag.localName().impl(), &HTMLParser::nestedCreateErrorCheck); - gFunctionMap.set(noembedTag.localName().impl(), &HTMLParser::noembedCreateErrorCheck); - gFunctionMap.set(noframesTag.localName().impl(), &HTMLParser::noframesCreateErrorCheck); - gFunctionMap.set(noscriptTag.localName().impl(), &HTMLParser::noscriptCreateErrorCheck); - gFunctionMap.set(olTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(pTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(plaintextTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(preTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - gFunctionMap.set(sTag.localName().impl(), &HTMLParser::nestedStyleCreateErrorCheck); - gFunctionMap.set(selectTag.localName().impl(), &HTMLParser::selectCreateErrorCheck); - gFunctionMap.set(smallTag.localName().impl(), &HTMLParser::nestedStyleCreateErrorCheck); - gFunctionMap.set(strikeTag.localName().impl(), &HTMLParser::nestedStyleCreateErrorCheck); - gFunctionMap.set(tableTag.localName().impl(), &HTMLParser::pCloserStrictCreateErrorCheck); - gFunctionMap.set(tbodyTag.localName().impl(), &HTMLParser::tableSectionCreateErrorCheck); - gFunctionMap.set(tdTag.localName().impl(), &HTMLParser::tableCellCreateErrorCheck); - gFunctionMap.set(textAtom.impl(), &HTMLParser::textCreateErrorCheck); - gFunctionMap.set(tfootTag.localName().impl(), &HTMLParser::tableSectionCreateErrorCheck); - gFunctionMap.set(thTag.localName().impl(), &HTMLParser::tableCellCreateErrorCheck); - gFunctionMap.set(theadTag.localName().impl(), &HTMLParser::tableSectionCreateErrorCheck); - gFunctionMap.set(trTag.localName().impl(), &HTMLParser::nestedCreateErrorCheck); - gFunctionMap.set(ttTag.localName().impl(), &HTMLParser::nestedStyleCreateErrorCheck); - gFunctionMap.set(uTag.localName().impl(), &HTMLParser::nestedStyleCreateErrorCheck); - gFunctionMap.set(ulTag.localName().impl(), &HTMLParser::pCloserCreateErrorCheck); - } - - bool proceed = true; - RefPtr<Node> result; - if (CreateErrorCheckFunc errorCheckFunc = gFunctionMap.get(t->tagName.impl())) - proceed = (this->*errorCheckFunc)(t, result); - if (proceed) - result = HTMLElementFactory::createHTMLElement(t->tagName, document, m_currentFormElement.get()); - return result.release(); -} - -bool HTMLParser::allowNestedRedundantTag(const AtomicString& tagName) -{ - // www.liceo.edu.mx is an example of a site that achieves a level of nesting of - // about 1500 tags, all from a bunch of <b>s. We will only allow at most 20 - // nested tags of the same type before just ignoring them all together. - unsigned i = 0; - for (HTMLStackElem* curr = blockStack; - i < cMaxRedundantTagDepth && curr && curr->tagName == tagName; - curr = curr->next, i++) { } - return i != cMaxRedundantTagDepth; -} - -void HTMLParser::processCloseTag(Token* t) -{ - // Support for really broken html. - // we never close the body tag, since some stupid web pages close it before the actual end of the doc. - // let's rely on the end() call to close things. - if (t->tagName == htmlTag || t->tagName == bodyTag || t->tagName == commentAtom) - return; - - bool checkForCloseTagErrors = true; - if (t->tagName == formTag && m_currentFormElement) { - m_currentFormElement = 0; - checkForCloseTagErrors = false; - } else if (t->tagName == mapTag) - m_currentMapElement = 0; - else if (t->tagName == pTag) - checkForCloseTagErrors = false; - - HTMLStackElem* oldElem = blockStack; - popBlock(t->tagName, checkForCloseTagErrors); - if (oldElem == blockStack && t->tagName == pTag) { - // We encountered a stray </p>. Amazingly Gecko, WinIE, and MacIE all treat - // this as a valid break, i.e., <p></p>. So go ahead and make the empty - // paragraph. - t->beginTag = true; - parseToken(t); - popBlock(t->tagName); - reportError(StrayParagraphCloseError); - } -} - -bool HTMLParser::isHeaderTag(const AtomicString& tagName) -{ - static HashSet<AtomicStringImpl*> headerTags; - if (headerTags.isEmpty()) { - headerTags.add(h1Tag.localName().impl()); - headerTags.add(h2Tag.localName().impl()); - headerTags.add(h3Tag.localName().impl()); - headerTags.add(h4Tag.localName().impl()); - headerTags.add(h5Tag.localName().impl()); - headerTags.add(h6Tag.localName().impl()); - } - - return headerTags.contains(tagName.impl()); -} - -bool HTMLParser::isInline(Node* node) const -{ - if (node->isTextNode()) - return true; - - if (node->isHTMLElement()) { - HTMLElement* e = static_cast<HTMLElement*>(node); - if (e->hasLocalName(aTag) || e->hasLocalName(fontTag) || e->hasLocalName(ttTag) || - e->hasLocalName(uTag) || e->hasLocalName(bTag) || e->hasLocalName(iTag) || - e->hasLocalName(sTag) || e->hasLocalName(strikeTag) || e->hasLocalName(bigTag) || - e->hasLocalName(smallTag) || e->hasLocalName(emTag) || e->hasLocalName(strongTag) || - e->hasLocalName(dfnTag) || e->hasLocalName(codeTag) || e->hasLocalName(sampTag) || - e->hasLocalName(kbdTag) || e->hasLocalName(varTag) || e->hasLocalName(citeTag) || - e->hasLocalName(abbrTag) || e->hasLocalName(acronymTag) || e->hasLocalName(subTag) || - e->hasLocalName(supTag) || e->hasLocalName(spanTag) || e->hasLocalName(nobrTag) || - e->hasLocalName(noframesTag) || e->hasLocalName(nolayerTag) || - e->hasLocalName(noembedTag)) - return true; - if (e->hasLocalName(noscriptTag) && !m_isParsingFragment) { - Settings* settings = document->settings(); - if (settings && settings->isJavaScriptEnabled()) - return true; - } - } - - return false; -} - -bool HTMLParser::isResidualStyleTag(const AtomicString& tagName) -{ - static HashSet<AtomicStringImpl*> residualStyleTags; - if (residualStyleTags.isEmpty()) { - residualStyleTags.add(aTag.localName().impl()); - residualStyleTags.add(fontTag.localName().impl()); - residualStyleTags.add(ttTag.localName().impl()); - residualStyleTags.add(uTag.localName().impl()); - residualStyleTags.add(bTag.localName().impl()); - residualStyleTags.add(iTag.localName().impl()); - residualStyleTags.add(sTag.localName().impl()); - residualStyleTags.add(strikeTag.localName().impl()); - residualStyleTags.add(bigTag.localName().impl()); - residualStyleTags.add(smallTag.localName().impl()); - residualStyleTags.add(emTag.localName().impl()); - residualStyleTags.add(strongTag.localName().impl()); - residualStyleTags.add(dfnTag.localName().impl()); - residualStyleTags.add(codeTag.localName().impl()); - residualStyleTags.add(sampTag.localName().impl()); - residualStyleTags.add(kbdTag.localName().impl()); - residualStyleTags.add(varTag.localName().impl()); - residualStyleTags.add(nobrTag.localName().impl()); - } - - return residualStyleTags.contains(tagName.impl()); -} - -bool HTMLParser::isAffectedByResidualStyle(const AtomicString& tagName) -{ - static HashSet<AtomicStringImpl*> unaffectedTags; - if (unaffectedTags.isEmpty()) { - unaffectedTags.add(bodyTag.localName().impl()); - unaffectedTags.add(tableTag.localName().impl()); - unaffectedTags.add(theadTag.localName().impl()); - unaffectedTags.add(tbodyTag.localName().impl()); - unaffectedTags.add(tfootTag.localName().impl()); - unaffectedTags.add(trTag.localName().impl()); - unaffectedTags.add(thTag.localName().impl()); - unaffectedTags.add(tdTag.localName().impl()); - unaffectedTags.add(captionTag.localName().impl()); - unaffectedTags.add(colgroupTag.localName().impl()); - unaffectedTags.add(colTag.localName().impl()); - unaffectedTags.add(optionTag.localName().impl()); - unaffectedTags.add(optgroupTag.localName().impl()); - unaffectedTags.add(selectTag.localName().impl()); - unaffectedTags.add(objectTag.localName().impl()); - } - - return !unaffectedTags.contains(tagName.impl()); -} - -void HTMLParser::handleResidualStyleCloseTagAcrossBlocks(HTMLStackElem* elem) -{ - HTMLStackElem* maxElem = 0; - bool finished = false; - bool strayTableContent = elem->strayTableContent; - - m_handlingResidualStyleAcrossBlocks = true; - while (!finished) { - // Find the outermost element that crosses over to a higher level. If there exists another higher-level - // element, we will do another pass, until we have corrected the innermost one. - ExceptionCode ec = 0; - HTMLStackElem* curr = blockStack; - HTMLStackElem* prev = 0; - HTMLStackElem* prevMaxElem = 0; - maxElem = 0; - finished = true; - while (curr && curr != elem) { - if (curr->level > elem->level) { - if (!isAffectedByResidualStyle(curr->tagName)) - return; - if (maxElem) - // We will need another pass. - finished = false; - maxElem = curr; - prevMaxElem = prev; - } - - prev = curr; - curr = curr->next; - } - - if (!curr || !maxElem) - return; - - Node* residualElem = prev->node; - Node* blockElem = prevMaxElem ? prevMaxElem->node : current; - Node* parentElem = elem->node; - - // Check to see if the reparenting that is going to occur is allowed according to the DOM. - // FIXME: We should either always allow it or perform an additional fixup instead of - // just bailing here. - // Example: <p><font><center>blah</font></center></p> isn't doing a fixup right now. - if (!parentElem->childAllowed(blockElem)) - return; - - m_hasPElementInScope = Unknown; - - if (maxElem->node->parentNode() != elem->node) { - // Walk the stack and remove any elements that aren't residual style tags. These - // are basically just being closed up. Example: - // <font><span>Moo<p>Goo</font></p>. - // In the above example, the <span> doesn't need to be reopened. It can just close. - HTMLStackElem* currElem = maxElem->next; - HTMLStackElem* prevElem = maxElem; - while (currElem != elem) { - HTMLStackElem* nextElem = currElem->next; - if (!isResidualStyleTag(currElem->tagName)) { - prevElem->next = nextElem; - prevElem->derefNode(); - prevElem->node = currElem->node; - prevElem->didRefNode = currElem->didRefNode; - delete currElem; - } - else - prevElem = currElem; - currElem = nextElem; - } - - // We have to reopen residual tags in between maxElem and elem. An example of this case is: - // <font><i>Moo<p>Foo</font>. - // In this case, we need to transform the part before the <p> into: - // <font><i>Moo</i></font><i> - // so that the <i> will remain open. This involves the modification of elements - // in the block stack. - // This will also affect how we ultimately reparent the block, since we want it to end up - // under the reopened residual tags (e.g., the <i> in the above example.) - RefPtr<Node> prevNode = 0; - currElem = maxElem; - while (currElem->node != residualElem) { - if (isResidualStyleTag(currElem->node->localName())) { - // Create a clone of this element. - // We call releaseRef to get a raw pointer since we plan to hand over ownership to currElem. - Node* currNode = currElem->node->cloneNode(false).releaseRef(); - reportError(ResidualStyleError, &currNode->localName()); - - // Change the stack element's node to point to the clone. - // The stack element adopts the reference we obtained above by calling release(). - currElem->derefNode(); - currElem->node = currNode; - currElem->didRefNode = true; - - // Attach the previous node as a child of this new node. - if (prevNode) - currNode->appendChild(prevNode, ec); - else // The new parent for the block element is going to be the innermost clone. - parentElem = currNode; // FIXME: We shifted parentElem to be a residual inline. We never checked to see if blockElem could be legally placed inside the inline though. - - prevNode = currNode; - } - - currElem = currElem->next; - } - - // Now append the chain of new residual style elements if one exists. - if (prevNode) - elem->node->appendChild(prevNode, ec); // FIXME: This append can result in weird stuff happening, like an inline chain being put into a table section. - } - - // Check if the block is still in the tree. If it isn't, then we don't - // want to remove it from its parent (that would crash) or insert it into - // a new parent later. See http://bugs.webkit.org/show_bug.cgi?id=6778 - bool isBlockStillInTree = blockElem->parentNode(); - - // We need to make a clone of |residualElem| and place it just inside |blockElem|. - // All content of |blockElem| is reparented to be under this clone. We then - // reparent |blockElem| using real DOM calls so that attachment/detachment will - // be performed to fix up the rendering tree. - // So for this example: <b>...<p>Foo</b>Goo</p> - // The end result will be: <b>...</b><p><b>Foo</b>Goo</p> - // - // Step 1: Remove |blockElem| from its parent, doing a batch detach of all the kids. - if (isBlockStillInTree) - blockElem->parentNode()->removeChild(blockElem, ec); - - Node* newNodePtr = 0; - if (blockElem->firstChild()) { - // Step 2: Clone |residualElem|. - RefPtr<Node> newNode = residualElem->cloneNode(false); // Shallow clone. We don't pick up the same kids. - newNodePtr = newNode.get(); - reportError(ResidualStyleError, &newNode->localName()); - - // Step 3: Place |blockElem|'s children under |newNode|. Remove all of the children of |blockElem| - // before we've put |newElem| into the document. That way we'll only do one attachment of all - // the new content (instead of a bunch of individual attachments). - Node* currNode = blockElem->firstChild(); - while (currNode) { - Node* nextNode = currNode->nextSibling(); - newNode->appendChild(currNode, ec); - currNode = nextNode; - } - - // Step 4: Place |newNode| under |blockElem|. |blockElem| is still out of the document, so no - // attachment can occur yet. - blockElem->appendChild(newNode.release(), ec); - } else - finished = true; - - // Step 5: Reparent |blockElem|. Now the full attachment of the fixed up tree takes place. - if (isBlockStillInTree) - parentElem->appendChild(blockElem, ec); - - // Step 6: Pull |elem| out of the stack, since it is no longer enclosing us. Also update - // the node associated with the previous stack element so that when it gets popped, - // it doesn't make the residual element the next current node. - HTMLStackElem* currElem = maxElem; - HTMLStackElem* prevElem = 0; - while (currElem != elem) { - prevElem = currElem; - currElem = currElem->next; - } - prevElem->next = elem->next; - prevElem->derefNode(); - prevElem->node = elem->node; - prevElem->didRefNode = elem->didRefNode; - if (!finished) { - // Repurpose |elem| to represent |newNode| and insert it at the appropriate position - // in the stack. We do not do this for the innermost block, because in that case the new - // node is effectively no longer open. - elem->next = maxElem; - elem->node = prevMaxElem->node; - elem->didRefNode = prevMaxElem->didRefNode; - elem->strayTableContent = false; - prevMaxElem->next = elem; - ASSERT(newNodePtr); - prevMaxElem->node = newNodePtr; - prevMaxElem->didRefNode = false; - } else - delete elem; - } - - // FIXME: If we ever make a case like this work: - // <table><b><i><form></b></form></i></table> - // Then this check will be too simplistic. Right now the <i><form> chain will end up inside the <tbody>, which is pretty crazy. - if (strayTableContent) - inStrayTableContent--; - - // Step 7: Reopen intermediate inlines, e.g., <b><p><i>Foo</b>Goo</p>. - // In the above example, Goo should stay italic. - // We cap the number of tags we're willing to reopen based off cResidualStyleMaxDepth. - - HTMLStackElem* curr = blockStack; - HTMLStackElem* residualStyleStack = 0; - unsigned stackDepth = 1; - unsigned redundantStyleCount = 0; - while (curr && curr != maxElem) { - // We will actually schedule this tag for reopening - // after we complete the close of this entire block. - if (isResidualStyleTag(curr->tagName) && stackDepth++ < cResidualStyleMaxDepth) { - // We've overloaded the use of stack elements and are just reusing the - // struct with a slightly different meaning to the variables. Instead of chaining - // from innermost to outermost, we build up a list of all the tags we need to reopen - // from the outermost to the innermost, i.e., residualStyleStack will end up pointing - // to the outermost tag we need to reopen. - // We also set curr->node to be the actual element that corresponds to the ID stored in - // curr->id rather than the node that you should pop to when the element gets pulled off - // the stack. - if (residualStyleStack && curr->tagName == residualStyleStack->tagName && curr->node->attributes()->mapsEquivalent(residualStyleStack->node->attributes())) - redundantStyleCount++; - else - redundantStyleCount = 0; - - if (redundantStyleCount < cMaxRedundantTagDepth) - moveOneBlockToStack(residualStyleStack); - else - popOneBlock(); - } else - popOneBlock(); - - curr = blockStack; - } - - reopenResidualStyleTags(residualStyleStack, 0); // Stray table content can't be an issue here, since some element above will always become the root of new stray table content. - - m_handlingResidualStyleAcrossBlocks = false; -} - -void HTMLParser::reopenResidualStyleTags(HTMLStackElem* elem, Node* malformedTableParent) -{ - // Loop for each tag that needs to be reopened. - while (elem) { - // Create a shallow clone of the DOM node for this element. - RefPtr<Node> newNode = elem->node->cloneNode(false); - reportError(ResidualStyleError, &newNode->localName()); - - // Append the new node. In the malformed table case, we need to insert before the table, - // which will be the last child. - ExceptionCode ec = 0; - if (malformedTableParent) - malformedTableParent->insertBefore(newNode, malformedTableParent->lastChild(), ec); - else - current->appendChild(newNode, ec); - // FIXME: Is it really OK to ignore the exceptions here? - - // Now push a new stack element for this node we just created. - pushBlock(elem->tagName, elem->level); - newNode->beginParsingChildren(); - - // Set our strayTableContent boolean if needed, so that the reopened tag also knows - // that it is inside a malformed table. - blockStack->strayTableContent = malformedTableParent != 0; - if (blockStack->strayTableContent) - inStrayTableContent++; - - // Clear our malformed table parent variable. - malformedTableParent = 0; - - // Update |current| manually to point to the new node. - setCurrent(newNode.get()); - - // Advance to the next tag that needs to be reopened. - HTMLStackElem* next = elem->next; - elem->derefNode(); - delete elem; - elem = next; - } -} - -void HTMLParser::pushBlock(const AtomicString& tagName, int level) -{ - blockStack = new HTMLStackElem(tagName, level, current, didRefCurrent, blockStack); - didRefCurrent = false; - if (tagName == pTag) - m_hasPElementInScope = InScope; - else if (isScopingTag(tagName)) - m_hasPElementInScope = NotInScope; -} - -void HTMLParser::popBlock(const AtomicString& tagName, bool reportErrors) -{ - HTMLStackElem* elem = blockStack; - - int maxLevel = 0; - - while (elem && (elem->tagName != tagName)) { - if (maxLevel < elem->level) - maxLevel = elem->level; - elem = elem->next; - } - - if (!elem) { - if (reportErrors) - reportError(StrayCloseTagError, &tagName, 0, true); - return; - } - - if (maxLevel > elem->level) { - // We didn't match because the tag is in a different scope, e.g., - // <b><p>Foo</b>. Try to correct the problem. - if (!isResidualStyleTag(tagName)) - return; - return handleResidualStyleCloseTagAcrossBlocks(elem); - } - - bool isAffectedByStyle = isAffectedByResidualStyle(elem->tagName); - HTMLStackElem* residualStyleStack = 0; - Node* malformedTableParent = 0; - - elem = blockStack; - unsigned stackDepth = 1; - unsigned redundantStyleCount = 0; - while (elem) { - if (elem->tagName == tagName) { - int strayTable = inStrayTableContent; - popOneBlock(); - elem = 0; - - // This element was the root of some malformed content just inside an implicit or - // explicit <tbody> or <tr>. - // If we end up needing to reopen residual style tags, the root of the reopened chain - // must also know that it is the root of malformed content inside a <tbody>/<tr>. - if (strayTable && (inStrayTableContent < strayTable) && residualStyleStack) { - Node* curr = current; - while (curr && !curr->hasTagName(tableTag)) - curr = curr->parentNode(); - malformedTableParent = curr ? curr->parentNode() : 0; - } - } - else { - if (m_currentFormElement && elem->tagName == formTag) - // A <form> is being closed prematurely (and this is - // malformed HTML). Set an attribute on the form to clear out its - // bottom margin. - m_currentFormElement->setMalformed(true); - - // Schedule this tag for reopening - // after we complete the close of this entire block. - if (isAffectedByStyle && isResidualStyleTag(elem->tagName) && stackDepth++ < cResidualStyleMaxDepth) { - // We've overloaded the use of stack elements and are just reusing the - // struct with a slightly different meaning to the variables. Instead of chaining - // from innermost to outermost, we build up a list of all the tags we need to reopen - // from the outermost to the innermost, i.e., residualStyleStack will end up pointing - // to the outermost tag we need to reopen. - // We also set elem->node to be the actual element that corresponds to the ID stored in - // elem->id rather than the node that you should pop to when the element gets pulled off - // the stack. - if (residualStyleStack && elem->tagName == residualStyleStack->tagName && elem->node->attributes()->mapsEquivalent(residualStyleStack->node->attributes())) - redundantStyleCount++; - else - redundantStyleCount = 0; - - if (redundantStyleCount < cMaxRedundantTagDepth) - moveOneBlockToStack(residualStyleStack); - else - popOneBlock(); - } else - popOneBlock(); - elem = blockStack; - } - } - - reopenResidualStyleTags(residualStyleStack, malformedTableParent); -} - -inline HTMLStackElem* HTMLParser::popOneBlockCommon() -{ - HTMLStackElem* elem = blockStack; - - // Form elements restore their state during the parsing process. - // Also, a few elements (<applet>, <object>) need to know when all child elements (<param>s) are available. - if (current && elem->node != current) - current->finishParsingChildren(); - - blockStack = elem->next; - current = elem->node; - didRefCurrent = elem->didRefNode; - - if (elem->strayTableContent) - inStrayTableContent--; - - if (elem->tagName == pTag) - m_hasPElementInScope = NotInScope; - else if (isScopingTag(elem->tagName)) - m_hasPElementInScope = Unknown; - - return elem; -} - -void HTMLParser::popOneBlock() -{ - // Store the current node before popOneBlockCommon overwrites it. - Node* lastCurrent = current; - bool didRefLastCurrent = didRefCurrent; - - delete popOneBlockCommon(); - - if (didRefLastCurrent) - lastCurrent->deref(); -} - -void HTMLParser::moveOneBlockToStack(HTMLStackElem*& head) -{ - // We'll be using the stack element we're popping, but for the current node. - // See the two callers for details. - - // Store the current node before popOneBlockCommon overwrites it. - Node* lastCurrent = current; - bool didRefLastCurrent = didRefCurrent; - - // Pop the block, but don't deref the current node as popOneBlock does because - // we'll be using the pointer in the new stack element. - HTMLStackElem* elem = popOneBlockCommon(); - - // Transfer the current node into the stack element. - // No need to deref the old elem->node because popOneBlockCommon transferred - // it into the current/didRefCurrent fields. - elem->node = lastCurrent; - elem->didRefNode = didRefLastCurrent; - elem->next = head; - head = elem; -} - -void HTMLParser::checkIfHasPElementInScope() -{ - m_hasPElementInScope = NotInScope; - HTMLStackElem* elem = blockStack; - while (elem) { - const AtomicString& tagName = elem->tagName; - if (tagName == pTag) { - m_hasPElementInScope = InScope; - return; - } else if (isScopingTag(tagName)) - return; - elem = elem->next; - } -} - -void HTMLParser::popInlineBlocks() -{ - while (blockStack && isInline(current)) - popOneBlock(); -} - -void HTMLParser::freeBlock() -{ - while (blockStack) - popOneBlock(); -} - -void HTMLParser::createHead() -{ - if (head || !document->documentElement()) - return; - - head = new HTMLHeadElement(document); - HTMLElement* body = document->body(); - ExceptionCode ec = 0; - document->documentElement()->insertBefore(head, body, ec); - if (ec) - head = 0; - - // If the body does not exist yet, then the <head> should be pushed as the current block. - if (head && !body) { - pushBlock(head->localName(), head->tagPriority()); - setCurrent(head); - } -} - -PassRefPtr<Node> HTMLParser::handleIsindex(Token* t) -{ - RefPtr<Node> n = new HTMLDivElement(document); - - NamedMappedAttrMap* attrs = t->attrs.get(); - - RefPtr<HTMLIsIndexElement> isIndex = new HTMLIsIndexElement(document, m_currentFormElement.get()); - isIndex->setAttributeMap(attrs); - isIndex->setAttribute(typeAttr, "khtml_isindex"); - - String text = searchableIndexIntroduction(); - if (attrs) { - if (Attribute* a = attrs->getAttributeItem(promptAttr)) - text = a->value().string() + " "; - t->attrs = 0; - } - - n->addChild(new HTMLHRElement(document)); - n->addChild(new Text(document, text)); - n->addChild(isIndex.release()); - n->addChild(new HTMLHRElement(document)); - - return n.release(); -} - -void HTMLParser::startBody() -{ - if (inBody) - return; - - inBody = true; - - if (m_isindexElement) { - insertNode(m_isindexElement.get(), true /* don't descend into this node */); - m_isindexElement = 0; - } -} - -void HTMLParser::finished() -{ - // In the case of a completely empty document, here's the place to create the HTML element. - if (current && current->isDocumentNode() && !document->documentElement()) - insertNode(new HTMLHtmlElement(document)); - - // This ensures that "current" is not left pointing to a node when the document is destroyed. - freeBlock(); - setCurrent(0); - - // Warning, this may delete the tokenizer and parser, so don't try to do anything else after this. - if (!m_isParsingFragment) - document->finishedParsing(); -} - -void HTMLParser::reportErrorToConsole(HTMLParserErrorCode errorCode, const AtomicString* tagName1, const AtomicString* tagName2, bool closeTags) -{ - Frame* frame = document->frame(); - if (!frame) - return; - - HTMLTokenizer* htmlTokenizer = static_cast<HTMLTokenizer*>(document->tokenizer()); - int lineNumber = htmlTokenizer->lineNumber() + 1; - - AtomicString tag1; - AtomicString tag2; - if (tagName1) { - if (*tagName1 == "#text") - tag1 = "Text"; - else if (*tagName1 == "#comment") - tag1 = "<!-- comment -->"; - else - tag1 = (closeTags ? "</" : "<") + *tagName1 + ">"; - } - if (tagName2) { - if (*tagName2 == "#text") - tag2 = "Text"; - else if (*tagName2 == "#comment") - tag2 = "<!-- comment -->"; - else - tag2 = (closeTags ? "</" : "<") + *tagName2 + ">"; - } - - const char* errorMsg = htmlParserErrorMessageTemplate(errorCode); - if (!errorMsg) - return; - - String message; - if (htmlTokenizer->processingContentWrittenByScript()) - message += htmlParserDocumentWriteMessage(); - message += errorMsg; - message.replace("%tag1", tag1); - message.replace("%tag2", tag2); - - frame->domWindow()->console()->addMessage(HTMLMessageSource, - isWarning(errorCode) ? WarningMessageLevel : ErrorMessageLevel, - message, lineNumber, document->url().string()); -} - -} |