dom_textimpl.cpp 11.7 KB
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/**
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *
 * 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.
 */

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#include "dom/dom_exception.h"
#include "css/cssstyleselector.h"
#include "xml/dom2_eventsimpl.h"
#include "xml/dom_textimpl.h"
#include "xml/dom_docimpl.h"
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#include "misc/htmlhashes.h"
#include "rendering/render_text.h"

#include <kdebug.h>

using namespace DOM;
using namespace khtml;


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CharacterDataImpl::CharacterDataImpl(DocumentPtr *doc)
    : NodeImpl(doc)
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{
    str = 0;
}

CharacterDataImpl::CharacterDataImpl(DocumentPtr *doc, const DOMString &_text)
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    : NodeImpl(doc)
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{
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    str = _text.impl ? _text.impl : new DOMStringImpl(0, 0);
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    str->ref();
}

CharacterDataImpl::~CharacterDataImpl()
{
    if(str) str->deref();
}

DOMString CharacterDataImpl::data() const
{
    return str;
}

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void CharacterDataImpl::setData( const DOMString &_data, int &exceptioncode )
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{
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    // NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly
    if (isReadOnly()) {
        exceptioncode = DOMException::NO_MODIFICATION_ALLOWED_ERR;
        return;
    }

    if(str == _data.impl) return; // ### fire DOMCharacterDataModified if modified?
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    DOMStringImpl *oldStr = str;
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    str = _data.impl;
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    if(str) str->ref();
    if (m_render)
      (static_cast<RenderText*>(m_render))->setText(str);
    setChanged(true);

    dispatchModifiedEvent(oldStr);
    if(oldStr) oldStr->deref();
}

unsigned long CharacterDataImpl::length() const
{
    return str->l;
}

DOMString CharacterDataImpl::substringData( const unsigned long offset, const unsigned long count, int &exceptioncode )
{
    exceptioncode = 0;
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    checkCharDataOperation(offset, exceptioncode);
    if (exceptioncode)
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        return DOMString();
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    return str->substring(offset,count);
}

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void CharacterDataImpl::appendData( const DOMString &arg, int &exceptioncode )
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{
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    exceptioncode = 0;

    // NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly
    if (isReadOnly()) {
        exceptioncode = DOMException::NO_MODIFICATION_ALLOWED_ERR;
        return;
    }

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    DOMStringImpl *oldStr = str;
    str = str->copy();
    str->ref();
    str->append(arg.impl);
    if (m_render)
      (static_cast<RenderText*>(m_render))->setText(str);
    setChanged(true);

    dispatchModifiedEvent(oldStr);
    oldStr->deref();
}

void CharacterDataImpl::insertData( const unsigned long offset, const DOMString &arg, int &exceptioncode )
{
    exceptioncode = 0;
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    checkCharDataOperation(offset, exceptioncode);
    if (exceptioncode)
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        return;
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    DOMStringImpl *oldStr = str;
    str = str->copy();
    str->ref();
    str->insert(arg.impl, offset);
    if (m_render)
      (static_cast<RenderText*>(m_render))->setText(str);
    setChanged(true);

    dispatchModifiedEvent(oldStr);
    oldStr->deref();
}

void CharacterDataImpl::deleteData( const unsigned long offset, const unsigned long count, int &exceptioncode )
{
    exceptioncode = 0;
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    checkCharDataOperation(offset, exceptioncode);
    if (exceptioncode)
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        return;

    DOMStringImpl *oldStr = str;
    str = str->copy();
    str->ref();
    str->remove(offset,count);
    if (m_render)
      (static_cast<RenderText*>(m_render))->setText(str);
    setChanged(true);

    dispatchModifiedEvent(oldStr);
    oldStr->deref();
}

void CharacterDataImpl::replaceData( const unsigned long offset, const unsigned long count, const DOMString &arg, int &exceptioncode )
{
    exceptioncode = 0;
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    checkCharDataOperation(offset, exceptioncode);
    if (exceptioncode)
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        return;

    unsigned long realCount;
    if (offset + count > str->l)
        realCount = str->l-offset;
    else
        realCount = count;

    DOMStringImpl *oldStr = str;
    str = str->copy();
    str->ref();
    str->remove(offset,realCount);
    str->insert(arg.impl, offset);
    if (m_render)
      (static_cast<RenderText*>(m_render))->setText(str);
    setChanged(true);

    dispatchModifiedEvent(oldStr);
    oldStr->deref();
}

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DOMString CharacterDataImpl::nodeValue() const
{
    return str;
}

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bool CharacterDataImpl::containsOnlyWhitespace() const
{
    if (str)
        return str->containsOnlyWhitespace();
    return true;
}

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void CharacterDataImpl::setNodeValue( const DOMString &_nodeValue, int &exceptioncode )
{
    // NO_MODIFICATION_ALLOWED_ERR: taken care of by setData()
    setData(_nodeValue, exceptioncode);
}

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void CharacterDataImpl::dispatchModifiedEvent(DOMStringImpl *prevValue)
{
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    if (parentNode())
        parentNode()->childrenChanged();
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    if (!getDocument()->hasListenerType(DocumentImpl::DOMCHARACTERDATAMODIFIED_LISTENER))
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        return;
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    DOMStringImpl *newValue = str->copy();
    newValue->ref();
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    int exceptioncode = 0;
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    dispatchEvent(new MutationEventImpl(EventImpl::DOMCHARACTERDATAMODIFIED_EVENT,
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		  true,false,0,prevValue,newValue,DOMString(),0),exceptioncode);
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    newValue->deref();
    dispatchSubtreeModifiedEvent();
}

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void CharacterDataImpl::checkCharDataOperation( const unsigned long offset, int &exceptioncode )
{
    exceptioncode = 0;

    // INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than the number of 16-bit
    // units in data.
    if (offset > str->l) {
        exceptioncode = DOMException::INDEX_SIZE_ERR;
        return;
    }

    // NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly
    if (isReadOnly()) {
        exceptioncode = DOMException::NO_MODIFICATION_ALLOWED_ERR;
        return;
    }
}

#ifndef NDEBUG
void CharacterDataImpl::dump(QTextStream *stream, QString ind) const
{
    *stream << " str=\"" << DOMString(str).string().ascii() << "\"";

    NodeImpl::dump(stream,ind);
}
#endif

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// ---------------------------------------------------------------------------

CommentImpl::CommentImpl(DocumentPtr *doc, const DOMString &_text)
    : CharacterDataImpl(doc, _text)
{
}

CommentImpl::CommentImpl(DocumentPtr *doc)
    : CharacterDataImpl(doc)
{
}

CommentImpl::~CommentImpl()
{
}

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DOMString CommentImpl::nodeName() const
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{
    return "#comment";
}

unsigned short CommentImpl::nodeType() const
{
    return Node::COMMENT_NODE;
}

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NodeImpl *CommentImpl::cloneNode(bool /*deep*/)
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{
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    return getDocument()->createComment( str );
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}

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NodeImpl::Id CommentImpl::id() const
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{
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    return ID_COMMENT;
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}

// DOM Section 1.1.1
bool CommentImpl::childTypeAllowed( unsigned short /*type*/ )
{
    return false;
}

// ---------------------------------------------------------------------------

// ### allow having children in text nodes for entities, comments etc.

TextImpl::TextImpl(DocumentPtr *doc, const DOMString &_text)
    : CharacterDataImpl(doc, _text)
{
}

TextImpl::TextImpl(DocumentPtr *doc)
    : CharacterDataImpl(doc)
{
}

TextImpl::~TextImpl()
{
}

TextImpl *TextImpl::splitText( const unsigned long offset, int &exceptioncode )
{
    exceptioncode = 0;
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    // INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than
    // the number of 16-bit units in data.

    // ### we explicitly check for a negative long that has been cast to an unsigned long
    // ... this can happen if JS code passes in -1 - we need to catch this earlier! (in the
    // kjs bindings)
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    if (offset > str->l || (long)offset < 0) {
        exceptioncode = DOMException::INDEX_SIZE_ERR;
        return 0;
    }

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    // NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
    if (isReadOnly()) {
        exceptioncode = DOMException::NO_MODIFICATION_ALLOWED_ERR;
        return 0;
    }

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    DOMStringImpl *oldStr = str;
    TextImpl *newText = createNew(str->substring(offset,str->l-offset));
    str = str->copy();
    str->ref();
    str->remove(offset,str->l-offset);

    dispatchModifiedEvent(oldStr);
    oldStr->deref();

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    if (parentNode())
        parentNode()->insertBefore(newText,nextSibling(), exceptioncode );
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    if ( exceptioncode )
        return 0;

    if (m_render)
        (static_cast<RenderText*>(m_render))->setText(str);
    setChanged(true);
    return newText;
}

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DOMString TextImpl::nodeName() const
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{
  return "#text";
}

unsigned short TextImpl::nodeType() const
{
    return Node::TEXT_NODE;
}

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NodeImpl *TextImpl::cloneNode(bool /*deep*/)
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{
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    return getDocument()->createTextNode(str);
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}

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void TextImpl::attach()
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{
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    assert(!m_render);
    assert(!attached());
    assert(parentNode() && parentNode()->isElementNode());
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    ElementImpl* element = static_cast<ElementImpl*>(parentNode());
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    if (!m_render && element->renderer() && !element->renderer()->isTextArea()) {
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        RenderObject* par = element->renderer();
        khtml::RenderStyle* _style = par->style();
        bool onlyWS = containsOnlyWhitespace();
        if (onlyWS) {
            if (par->isTable() || par->isTableRow() || par->isTableSection())
                return CharacterDataImpl::attach();
        
            if (!par->isInline() && _style->whiteSpace() != PRE) {
                RenderObject* prevRender = previousRenderer();
                if (par->isFlow() && !par->childrenInline() && 
                    (!prevRender || !prevRender->isInline()))
                    return CharacterDataImpl::attach();
                
                RenderObject* nextRender = nextRenderer();
                if ((!par->firstChild() || 
                    nextRender == par->firstChild()))
                    // Whitespace at the start of a block just goes away.  Don't even
                    // make a render object for this text.
                    return CharacterDataImpl::attach();
            }
        }

        m_render = new (getDocument()->renderArena()) RenderText(this, str);
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        m_render->setStyle(_style);
        parentNode()->renderer()->addChild(m_render, nextRenderer());
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    }

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    CharacterDataImpl::attach();
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}

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NodeImpl::Id TextImpl::id() const
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{
    return ID_TEXT;
}

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void TextImpl::recalcStyle( StyleChange change )
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{
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//      qDebug("textImpl::recalcStyle");
    if (change != NoChange && parentNode()) {
// 	qDebug("DomText::recalcStyle");
	if(m_render)
	    m_render->setStyle(parentNode()->renderer()->style());
    }
    if ( changed() && m_render && m_render->isText() )
	static_cast<RenderText*>(m_render)->setText(str);
    setChanged( false );
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}

// DOM Section 1.1.1
bool TextImpl::childTypeAllowed( unsigned short /*type*/ )
{
    return false;
}

TextImpl *TextImpl::createNew(DOMStringImpl *_str)
{
    return new TextImpl(docPtr(),_str);
}

// ---------------------------------------------------------------------------

CDATASectionImpl::CDATASectionImpl(DocumentPtr *impl, const DOMString &_text) : TextImpl(impl,_text)
{
}

CDATASectionImpl::CDATASectionImpl(DocumentPtr *impl) : TextImpl(impl)
{
}

CDATASectionImpl::~CDATASectionImpl()
{
}

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DOMString CDATASectionImpl::nodeName() const
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{
  return "#cdata-section";
}

unsigned short CDATASectionImpl::nodeType() const
{
    return Node::CDATA_SECTION_NODE;
}

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NodeImpl *CDATASectionImpl::cloneNode(bool /*deep*/)
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{
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    return getDocument()->createCDATASection(str);
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}

// DOM Section 1.1.1
bool CDATASectionImpl::childTypeAllowed( unsigned short /*type*/ )
{
    return false;
}

TextImpl *CDATASectionImpl::createNew(DOMStringImpl *_str)
{
    return new CDATASectionImpl(docPtr(),_str);
}