htmlelement.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

    }
}

void HTMLElement::setContentEditable(const String &enabled)
{
    if (enabled == "inherit") {
        ExceptionCode ec;
        removeAttribute(contenteditableAttr, ec);
    }
    else
        setAttribute(contenteditableAttr, enabled.isEmpty() ? "true" : enabled);
}

void HTMLElement::click()
{
    dispatchSimulatedClick(0, false, false);
}

// accessKeyAction is used by the accessibility support code
// to send events to elements that our JavaScript caller does
// does not.  The elements JS is interested in have subclasses
// that override this method to direct the click appropriately.
// Here in the base class, then, we only send the click if
// the caller wants it to go to any HTMLElement, and we say
// to send the mouse events in addition to the click.
void HTMLElement::accessKeyAction(bool sendToAnyElement)
{
    if (sendToAnyElement)
        dispatchSimulatedClick(0, true);
}

String HTMLElement::id() const
{
    return getAttribute(idAttr);
}

void HTMLElement::setId(const String& value)
{
    setAttribute(idAttr, value);
}

String HTMLElement::title() const
{
    return getAttribute(titleAttr);
}

void HTMLElement::setTitle(const String& value)
{
    setAttribute(titleAttr, value);
}

String HTMLElement::lang() const
{
    return getAttribute(langAttr);
}

void HTMLElement::setLang(const String& value)
{
    setAttribute(langAttr, value);
}

String HTMLElement::dir() const
{
    return getAttribute(dirAttr);
}

void HTMLElement::setDir(const String &value)
{
    setAttribute(dirAttr, value);
}

String HTMLElement::className() const
{
    return getAttribute(classAttr);
}

void HTMLElement::setClassName(const String &value)
{
    setAttribute(classAttr, value);
}

short HTMLElement::tabIndex() const
{
    if (supportsFocus())
        return Element::tabIndex();
    return -1;
}

void HTMLElement::setTabIndex(int value)
{
    setAttribute(tabindexAttr, String::number(value));
}

PassRefPtr<HTMLCollection> HTMLElement::children()
{
    return HTMLCollection::create(this, HTMLCollection::NodeChildren);
}

// DOM Section 1.1.1
bool HTMLElement::childAllowed(Node *newChild)
{
    if (!Element::childAllowed(newChild))
        return false;

    // For XML documents, we are non-validating and do not check against a DTD, even for HTML elements.
    if (!document()->isHTMLDocument())
        return true;

    // Future-proof for XML content inside HTML documents (we may allow this some day).
    if (newChild->isElementNode() && !newChild->isHTMLElement())
        return true;

    // Elements with forbidden tag status can never have children
    if (endTagRequirement() == TagStatusForbidden)
        return false;

    // Comment nodes are always allowed.
    if (newChild->isCommentNode())
        return true;

    // Now call checkDTD.
    return checkDTD(newChild);
}

// DTD Stuff
// This unfortunate function is only needed when checking against the DTD.  Other languages (like SVG) won't need this.
bool HTMLElement::isRecognizedTagName(const QualifiedName& tagName)
{
    DEFINE_STATIC_LOCAL(HashSet<AtomicStringImpl*>, tagList, ());
    if (tagList.isEmpty()) {
        size_t tagCount = 0;
        WebCore::QualifiedName** tags = HTMLNames::getHTMLTags(&tagCount);
        for (size_t i = 0; i < tagCount; i++)
            tagList.add(tags[i]->localName().impl());
    }
    return tagList.contains(tagName.localName().impl());
}

// The terms inline and block are used here loosely.  Don't make the mistake of assuming all inlines or all blocks
// need to be in these two lists.
static HashSet<AtomicStringImpl*>* inlineTagList()
{
    DEFINE_STATIC_LOCAL(HashSet<AtomicStringImpl*>, tagList, ());
    if (tagList.isEmpty()) {
        tagList.add(ttTag.localName().impl());
        tagList.add(iTag.localName().impl());
        tagList.add(bTag.localName().impl());
        tagList.add(uTag.localName().impl());
        tagList.add(sTag.localName().impl());
        tagList.add(strikeTag.localName().impl());
        tagList.add(bigTag.localName().impl());
        tagList.add(smallTag.localName().impl());
        tagList.add(emTag.localName().impl());
        tagList.add(strongTag.localName().impl());
        tagList.add(dfnTag.localName().impl());
        tagList.add(codeTag.localName().impl());
        tagList.add(sampTag.localName().impl());
        tagList.add(kbdTag.localName().impl());
        tagList.add(varTag.localName().impl());
        tagList.add(citeTag.localName().impl());
        tagList.add(abbrTag.localName().impl());
        tagList.add(acronymTag.localName().impl());
        tagList.add(aTag.localName().impl());
        tagList.add(canvasTag.localName().impl());
        tagList.add(imgTag.localName().impl());
        tagList.add(appletTag.localName().impl());
        tagList.add(objectTag.localName().impl());
        tagList.add(embedTag.localName().impl());
        tagList.add(fontTag.localName().impl());
        tagList.add(basefontTag.localName().impl());
        tagList.add(brTag.localName().impl());
        tagList.add(scriptTag.localName().impl());
        tagList.add(styleTag.localName().impl());
        tagList.add(linkTag.localName().impl());
        tagList.add(mapTag.localName().impl());
        tagList.add(qTag.localName().impl());
        tagList.add(subTag.localName().impl());
        tagList.add(supTag.localName().impl());
        tagList.add(spanTag.localName().impl());
        tagList.add(bdoTag.localName().impl());
        tagList.add(iframeTag.localName().impl());
        tagList.add(inputTag.localName().impl());
        tagList.add(keygenTag.localName().impl());
        tagList.add(selectTag.localName().impl());
        tagList.add(textareaTag.localName().impl());
        tagList.add(labelTag.localName().impl());
        tagList.add(buttonTag.localName().impl());
        tagList.add(insTag.localName().impl());
        tagList.add(delTag.localName().impl());
        tagList.add(nobrTag.localName().impl());
        tagList.add(wbrTag.localName().impl());
#if ENABLE(VIDEO)
        tagList.add(audioTag.localName().impl());
        tagList.add(videoTag.localName().impl());
#endif
    }
    return &tagList;
}

static HashSet<AtomicStringImpl*>* blockTagList()
{
    DEFINE_STATIC_LOCAL(HashSet<AtomicStringImpl*>, tagList, ());
    if (tagList.isEmpty()) {
        tagList.add(addressTag.localName().impl());
        tagList.add(blockquoteTag.localName().impl());
        tagList.add(centerTag.localName().impl());
        tagList.add(ddTag.localName().impl());
        tagList.add(dirTag.localName().impl());
        tagList.add(divTag.localName().impl());
        tagList.add(dlTag.localName().impl());
        tagList.add(dtTag.localName().impl());
        tagList.add(fieldsetTag.localName().impl());
        tagList.add(formTag.localName().impl());
        tagList.add(h1Tag.localName().impl());
        tagList.add(h2Tag.localName().impl());
        tagList.add(h3Tag.localName().impl());
        tagList.add(h4Tag.localName().impl());
        tagList.add(h5Tag.localName().impl());
        tagList.add(h6Tag.localName().impl());
        tagList.add(hrTag.localName().impl());
        tagList.add(isindexTag.localName().impl());
        tagList.add(layerTag.localName().impl());
        tagList.add(liTag.localName().impl());
        tagList.add(listingTag.localName().impl());
        tagList.add(marqueeTag.localName().impl());
        tagList.add(menuTag.localName().impl());
        tagList.add(noembedTag.localName().impl());
        tagList.add(noframesTag.localName().impl());
        tagList.add(nolayerTag.localName().impl());
        tagList.add(noscriptTag.localName().impl());
        tagList.add(olTag.localName().impl());
        tagList.add(pTag.localName().impl());
        tagList.add(plaintextTag.localName().impl());
        tagList.add(preTag.localName().impl());
        tagList.add(tableTag.localName().impl());
        tagList.add(ulTag.localName().impl());
        tagList.add(xmpTag.localName().impl());
    }
    return &tagList;
}

bool HTMLElement::inEitherTagList(const Node* newChild)
{
    if (newChild->isTextNode())
        return true;
        
    if (newChild->isHTMLElement()) {
        const HTMLElement* child = static_cast<const HTMLElement*>(newChild);
        if (inlineTagList()->contains(child->tagQName().localName().impl()))
            return true;
        if (blockTagList()->contains(child->tagQName().localName().impl()))
            return true;
        return !isRecognizedTagName(child->tagQName()); // Accept custom html tags
    }

    return false;
}

bool HTMLElement::inInlineTagList(const Node* newChild)
{
    if (newChild->isTextNode())
        return true;

    if (newChild->isHTMLElement()) {
        const HTMLElement* child = static_cast<const HTMLElement*>(newChild);
        if (inlineTagList()->contains(child->tagQName().localName().impl()))
            return true;
        return !isRecognizedTagName(child->tagQName()); // Accept custom html tags
    }

    return false;
}

bool HTMLElement::inBlockTagList(const Node* newChild)
{
    if (newChild->isTextNode())
        return true;
            
    if (newChild->isHTMLElement()) {
        const HTMLElement* child = static_cast<const HTMLElement*>(newChild);
        return (blockTagList()->contains(child->tagQName().localName().impl()));
    }

    return false;
}

bool HTMLElement::checkDTD(const Node* newChild)
{
    if (hasLocalName(addressTag) && newChild->hasTagName(pTag))
        return true;
    return inEitherTagList(newChild);
}
    
bool HTMLElement::rendererIsNeeded(RenderStyle *style)
{
    if (hasLocalName(noscriptTag)) {
        Settings* settings = document()->settings();
        if (settings && settings->isJavaScriptEnabled())
            return false;
    }
    return StyledElement::rendererIsNeeded(style);
}
    
RenderObject* HTMLElement::createRenderer(RenderArena* arena, RenderStyle* style)
{
    if (hasLocalName(wbrTag))
        return new (arena) RenderWordBreak(this);
    return RenderObject::createObject(this, style);
}

HTMLFormElement* HTMLElement::findFormAncestor() const
{
    for (Node* ancestor = parentNode(); ancestor; ancestor = ancestor->parentNode())
        if (ancestor->hasTagName(formTag))
            return static_cast<HTMLFormElement*>(ancestor);
    return 0;
}

HTMLFormElement* HTMLElement::virtualForm() const
{
    return findFormAncestor();
}

} // namespace WebCore

#ifndef NDEBUG

// For use in the debugger
void dumpInnerHTML(WebCore::HTMLElement*);

void dumpInnerHTML(WebCore::HTMLElement* element)
{
    printf("%s\n", element->innerHTML().ascii().data());
}
#endif