htmlscriptelement.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

/*
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 1999 Antti Koivisto ([e-mail])
 *           (C) 2001 Dirk Mueller ([e-mail])
 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 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 "HTMLScriptElement.h"

#include "Document.h"
#include "EventNames.h"
#include "HTMLNames.h"
#include "Text.h"

namespace WebCore {

using namespace HTMLNames;

HTMLScriptElement::HTMLScriptElement(const QualifiedName& tagName, Document* doc, bool createdByParser)
    : HTMLElement(tagName, doc)
    , m_data(this, this)
{
    ASSERT(hasTagName(scriptTag));
    m_data.setCreatedByParser(createdByParser);
}

HTMLScriptElement::~HTMLScriptElement()
{
}

bool HTMLScriptElement::isURLAttribute(Attribute* attr) const
{
    return attr->name() == sourceAttributeValue();
}

bool HTMLScriptElement::shouldExecuteAsJavaScript() const
{
    return m_data.shouldExecuteAsJavaScript();
}

void HTMLScriptElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
{
    ScriptElement::childrenChanged(m_data);
    HTMLElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
}

void HTMLScriptElement::parseMappedAttribute(MappedAttribute* attr)
{
    const QualifiedName& attrName = attr->name();

    if (attrName == srcAttr)
        handleSourceAttribute(m_data, attr->value());
    else if (attrName == onloadAttr)
        setInlineEventListenerForTypeAndAttribute(eventNames().loadEvent, attr);
    else
        HTMLElement::parseMappedAttribute(attr);
}

void HTMLScriptElement::finishParsingChildren()
{
    ScriptElement::finishParsingChildren(m_data, sourceAttributeValue());
    HTMLElement::finishParsingChildren();
}

void HTMLScriptElement::insertedIntoDocument()
{
    HTMLElement::insertedIntoDocument();
    ScriptElement::insertedIntoDocument(m_data, sourceAttributeValue());
}

void HTMLScriptElement::removedFromDocument()
{
    HTMLElement::removedFromDocument();
    ScriptElement::removedFromDocument(m_data);
}

String HTMLScriptElement::text() const
{
    return m_data.scriptContent();
}

void HTMLScriptElement::setText(const String &value)
{
    ExceptionCode ec = 0;
    int numChildren = childNodeCount();

    if (numChildren == 1 && firstChild()->isTextNode()) {
        static_cast<Text*>(firstChild())->setData(value, ec);
        return;
    }

    if (numChildren > 0)
        removeChildren();

    appendChild(document()->createTextNode(value.impl()), ec);
}

String HTMLScriptElement::htmlFor() const
{
    // DOM Level 1 says: reserved for future use.
    return String();
}

void HTMLScriptElement::setHtmlFor(const String&)
{
    // DOM Level 1 says: reserved for future use.
}

String HTMLScriptElement::event() const
{
    // DOM Level 1 says: reserved for future use.
    return String();
}

void HTMLScriptElement::setEvent(const String&)
{
    // DOM Level 1 says: reserved for future use.
}

String HTMLScriptElement::charset() const
{
    return charsetAttributeValue();
}

void HTMLScriptElement::setCharset(const String &value)
{
    setAttribute(charsetAttr, value);
}

bool HTMLScriptElement::defer() const
{
    return !getAttribute(deferAttr).isNull();
}

void HTMLScriptElement::setDefer(bool defer)
{
    setAttribute(deferAttr, defer ? "" : 0);
}

KURL HTMLScriptElement::src() const
{
    return document()->completeURL(sourceAttributeValue());
}

void HTMLScriptElement::setSrc(const String &value)
{
    setAttribute(srcAttr, value);
}

String HTMLScriptElement::type() const
{
    return typeAttributeValue();
}

void HTMLScriptElement::setType(const String &value)
{
    setAttribute(typeAttr, value);
}

String HTMLScriptElement::scriptCharset() const
{
    return m_data.scriptCharset();
}

String HTMLScriptElement::scriptContent() const
{
    return m_data.scriptContent();
}

void HTMLScriptElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
{
    HTMLElement::addSubresourceAttributeURLs(urls);

    addSubresourceURL(urls, src());
}

String HTMLScriptElement::sourceAttributeValue() const
{
    return getAttribute(srcAttr).string();
}

String HTMLScriptElement::charsetAttributeValue() const
{
    return getAttribute(charsetAttr).string();
}

String HTMLScriptElement::typeAttributeValue() const
{
    return getAttribute(typeAttr).string();
}

String HTMLScriptElement::languageAttributeValue() const
{
    return getAttribute(languageAttr).string();
}
 
void HTMLScriptElement::dispatchLoadEvent()
{
    ASSERT(!m_data.haveFiredLoadEvent());
    m_data.setHaveFiredLoadEvent(true);

    dispatchEventForType(eventNames().loadEvent, false, false);
}

void HTMLScriptElement::dispatchErrorEvent()
{
    dispatchEventForType(eventNames().errorEvent, true, false);
}

}