dom_nodeimpl.cpp

手机浏览器源码程序,功能强大

/**
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 1999 Antti Koivisto ([e-mail])
 *           (C) 2001 Dirk Mueller ([e-mail])
 * Copyright (C) 2004 Apple Computer, Inc.
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "xml/dom_nodeimpl.h"

#include "dom/dom_exception.h"
#include "misc/htmlattrs.h"
#include "misc/htmltags.h"
#include "xml/dom_elementimpl.h"
#include "xml/dom_textimpl.h"
#include "xml/dom2_eventsimpl.h"
#include "xml/dom_docimpl.h"
#include "xml/dom_position.h"
#include "xml/dom2_rangeimpl.h"
#include "css/csshelper.h"
#include "css/cssstyleselector.h"
#include "editing/html_interchange.h"
#include "editing/selection.h"

#include <kglobal.h>
#include <kdebug.h>

#include "rendering/render_object.h"
#include "rendering/render_text.h"

#include "ecma/kjs_binding.h"
#include "ecma/kjs_proxy.h"
#include "khtmlview.h"
#include "khtml_part.h"

#include "html/dtd.h"

#ifndef KHTML_NO_XBL
#include "xbl/xbl_binding_manager.h"
#endif

#if APPLE_CHANGES
#include "KWQAssertions.h"
#include "KWQLogging.h"
#else
#define ASSERT(assertion) assert(assertion)
#define LOG(channel, formatAndArgs...) ((void)0)
#endif

using namespace DOM;
using namespace khtml;

NodeImpl::NodeImpl(DocumentPtr *doc)
    : document(doc),
      m_previous(0),
      m_next(0),
      m_render(0),
      m_regdListeners( 0 ),
      m_nodeLists( 0 ),
      m_tabIndex( 0 ),
      m_hasId( false ),
      m_hasClass( false ),
      m_hasStyle( false ),
      m_attached(false),
      m_changed( false ),
      m_hasChangedChild( false ),
      m_inDocument( false ),
      m_hasAnchor( false ),
      m_specified( false ),
      m_focused( false ),
      m_active( false ),
      m_styleElement( false ),
      m_implicit( false )
{
    if (document)
        document->ref();
}

void NodeImpl::setDocument(DocumentPtr *doc)
{
    if (inDocument())
	return;

    if (doc)
	doc->ref();

    if (document)
	document->deref();

    document = doc;
}

NodeImpl::~NodeImpl()
{
    if (m_render)
        detach();
    if (m_regdListeners && !m_regdListeners->isEmpty() && getDocument() && !inDocument())
        getDocument()->unregisterDisconnectedNodeWithEventListeners(this);
    delete m_regdListeners;
    delete m_nodeLists;
    if (document)
        document->deref();
    if (m_previous)
        m_previous->setNextSibling(0);
    if (m_next)
        m_next->setPreviousSibling(0);
}

DOMString NodeImpl::nodeValue() const
{
  return DOMString();
}

void NodeImpl::setNodeValue( const DOMString &/*_nodeValue*/, int &exceptioncode )
{
    // NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly
    if (isReadOnly()) {
        exceptioncode = DOMException::NO_MODIFICATION_ALLOWED_ERR;
        return;
    }

    // be default nodeValue is null, so setting it has no effect
}

DOMString NodeImpl::nodeName() const
{
  return DOMString();
}

unsigned short NodeImpl::nodeType() const
{
  return 0;
}

NodeListImpl *NodeImpl::childNodes()
{
  return new ChildNodeListImpl(this);
}

NodeImpl *NodeImpl::firstChild() const
{
  return 0;
}

NodeImpl *NodeImpl::lastChild() const
{
  return 0;
}

NodeImpl *NodeImpl::lastDescendent() const
{
    NodeImpl *n = const_cast<NodeImpl *>(this);
    while (n && n->lastChild())
        n = n->lastChild();
    return n;
}

NodeImpl *NodeImpl::insertBefore( NodeImpl *newChild, NodeImpl *, int &exceptioncode )
{
    newChild->ref();
    newChild->deref();
    exceptioncode = DOMException::HIERARCHY_REQUEST_ERR;
    return 0;
}

NodeImpl *NodeImpl::replaceChild( NodeImpl *newChild, NodeImpl *, int &exceptioncode )
{
  newChild->ref();
  newChild->deref();
  exceptioncode = DOMException::HIERARCHY_REQUEST_ERR;
  return 0;
}

NodeImpl *NodeImpl::removeChild( NodeImpl *, int &exceptioncode )
{
  exceptioncode = DOMException::NOT_FOUND_ERR;
  return 0;
}

NodeImpl *NodeImpl::appendChild( NodeImpl *newChild, int &exceptioncode )
{
    newChild->ref();
    newChild->deref();
    exceptioncode = DOMException::HIERARCHY_REQUEST_ERR;
    return 0;
}

void NodeImpl::remove(int &exceptioncode)
{
    exceptioncode = 0;
    if (!parentNode()) {
        exceptioncode = DOMException::HIERARCHY_REQUEST_ERR;
        return;
    }

    parentNode()->removeChild(this, exceptioncode);
}

bool NodeImpl::hasChildNodes(  ) const
{
  return false;
}

void NodeImpl::normalize ()
{
    // ### normalize attributes? (when we store attributes using child nodes)
    int exceptioncode = 0;
    NodeImpl *child = firstChild();

    // Recursively go through the subtree beneath us, normalizing all nodes. In the case
    // where there are two adjacent text nodes, they are merged together
    while (child) {
        NodeImpl *nextChild = child->nextSibling();

        if (nextChild && child->nodeType() == Node::TEXT_NODE && nextChild->nodeType() == Node::TEXT_NODE) {
            // Current child and the next one are both text nodes... merge them
            TextImpl *currentText = static_cast<TextImpl*>(child);
            TextImpl *nextText = static_cast<TextImpl*>(nextChild);

            currentText->appendData(nextText->data(),exceptioncode);
            if (exceptioncode)
                return;

            removeChild(nextChild,exceptioncode);
            if (exceptioncode)
                return;
        }
        else {
            child->normalize();
            child = nextChild;
        }
    }
}

DOMString NodeImpl::prefix() const
{
    // For nodes other than elements and attributes, the prefix is always null
    return DOMString();
}

void NodeImpl::setPrefix(const DOMString &/*_prefix*/, int &exceptioncode )
{
    // The spec says that for nodes other than elements and attributes, prefix is always null.
    // It does not say what to do when the user tries to set the prefix on another type of
    // node, however mozilla throws a NAMESPACE_ERR exception
    exceptioncode = DOMException::NAMESPACE_ERR;
}

DOMString NodeImpl::localName() const
{
    return DOMString();
}

void NodeImpl::setFirstChild(NodeImpl *)
{
}

void NodeImpl::setLastChild(NodeImpl *)
{
}

NodeImpl *NodeImpl::addChild(NodeImpl *)
{
  return 0;
}

bool NodeImpl::isContentEditable() const
{
    return m_parent ? m_parent->isContentEditable() : false;
}

QRect NodeImpl::getRect() const
{
    int _x, _y;
    if(m_render && m_render->absolutePosition(_x, _y))
        return QRect( _x, _y, m_render->width(), m_render->height() );

    return QRect();
}

void NodeImpl::setChanged(bool b)
{
    if (b && !attached()) // changed compared to what?
        return;

    m_changed = b;
    if ( b ) {
	NodeImpl *p = parentNode();
	while ( p ) {
	    p->setHasChangedChild( true );
	    p = p->parentNode();
	}
        getDocument()->setDocumentChanged(true);
    }
}

bool NodeImpl::isInline() const
{
    if (m_render) return m_render->style()->display() == khtml::INLINE;
    return !isElementNode();
}

bool NodeImpl::isFocusable() const
{
    return false;
}

bool NodeImpl::isKeyboardFocusable() const
{
    return isFocusable();
}

bool NodeImpl::isMouseFocusable() const
{
    return isFocusable();
}

unsigned long NodeImpl::nodeIndex() const
{
    NodeImpl *_tempNode = previousSibling();
    unsigned long count=0;
    for( count=0; _tempNode; count++ )
        _tempNode = _tempNode->previousSibling();
    return count;
}

void NodeImpl::addEventListener(int id, EventListener *listener, const bool useCapture)
{
    if (getDocument() && !getDocument()->attached())
        return;

    switch (id) {
	case EventImpl::DOMSUBTREEMODIFIED_EVENT:
	    getDocument()->addListenerType(DocumentImpl::DOMSUBTREEMODIFIED_LISTENER);
	    break;
	case EventImpl::DOMNODEINSERTED_EVENT:
	    getDocument()->addListenerType(DocumentImpl::DOMNODEINSERTED_LISTENER);
	    break;
	case EventImpl::DOMNODEREMOVED_EVENT:
	    getDocument()->addListenerType(DocumentImpl::DOMNODEREMOVED_LISTENER);
	    break;
        case EventImpl::DOMNODEREMOVEDFROMDOCUMENT_EVENT:
	    getDocument()->addListenerType(DocumentImpl::DOMNODEREMOVEDFROMDOCUMENT_LISTENER);
	    break;
        case EventImpl::DOMNODEINSERTEDINTODOCUMENT_EVENT:
	    getDocument()->addListenerType(DocumentImpl::DOMNODEINSERTEDINTODOCUMENT_LISTENER);
	    break;
        case EventImpl::DOMATTRMODIFIED_EVENT:
	    getDocument()->addListenerType(DocumentImpl::DOMATTRMODIFIED_LISTENER);
	    break;
        case EventImpl::DOMCHARACTERDATAMODIFIED_EVENT:
	    getDocument()->addListenerType(DocumentImpl::DOMCHARACTERDATAMODIFIED_LISTENER);
	    break;
	default:
	    break;
    }

    RegisteredEventListener *rl = new RegisteredEventListener(static_cast<EventImpl::EventId>(id),listener,useCapture);
    if (!m_regdListeners) {
        m_regdListeners = new QPtrList<RegisteredEventListener>;
	m_regdListeners->setAutoDelete(true);
    }

    listener->ref();

    // remove existing identical listener set with identical arguments - the DOM2
    // spec says that "duplicate instances are discarded" in this case.
    removeEventListener(id,listener,useCapture);

    // adding the first one
    if (m_regdListeners->isEmpty() && getDocument() && !inDocument())
        getDocument()->registerDisconnectedNodeWithEventListeners(this);
        
    m_regdListeners->append(rl);
    listener->deref();
}

void NodeImpl::removeEventListener(int id, EventListener *listener, bool useCapture)
{
    if (!m_regdListeners) // nothing to remove
        return;

    RegisteredEventListener rl(static_cast<EventImpl::EventId>(id),listener,useCapture);

    QPtrListIterator<RegisteredEventListener> it(*m_regdListeners);
    for (; it.current(); ++it)
        if (*(it.current()) == rl) {
            m_regdListeners->removeRef(it.current());
            // removed last
            if (m_regdListeners->isEmpty() && getDocument() && !inDocument())
                getDocument()->unregisterDisconnectedNodeWithEventListeners(this);
            return;
        }
}

void NodeImpl::removeAllEventListeners()
{
    delete m_regdListeners;
    m_regdListeners = 0;
}

void NodeImpl::removeHTMLEventListener(int id)
{
    if (!m_regdListeners) // nothing to remove
        return;

    QPtrListIterator<RegisteredEventListener> it(*m_regdListeners);
    for (; it.current(); ++it)
        if (it.current()->id == id &&
            it.current()->listener->eventListenerType() == "_khtml_HTMLEventListener") {
            m_regdListeners->removeRef(it.current());
            // removed last
            if (m_regdListeners->isEmpty() && getDocument() && !inDocument())
                getDocument()->unregisterDisconnectedNodeWithEventListeners(this);
            return;
        }
}

void NodeImpl::setHTMLEventListener(int id, EventListener *listener)
{
    // in case we already have it, we don't want removeHTMLEventListener to destroy it
    if (listener)
        listener->ref();
    removeHTMLEventListener(id);
    if (listener)
    {
        addEventListener(id,listener,false);
        listener->deref();
    }