C++ DOMStringImpl类代码示例

void CharacterDataImpl::replaceData( const unsigned long offset, const unsigned long count, const DOMString &arg, int &exceptioncode )
{
    exceptioncode = 0;
    if ((long)count < 0)
	exceptioncode = DOMException::INDEX_SIZE_ERR;
    else
	checkCharDataOperation(offset, exceptioncode);
    if (exceptioncode)
        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();
}

XMLElementImpl::XMLElementImpl(DocumentPtr *doc, DOMStringImpl *_qualifiedName, DOMStringImpl *_namespaceURI)
    : ElementImpl(doc)
{
    int colonpos = -1;
    for (uint i = 0; i < _qualifiedName->l; ++i)
        if (_qualifiedName->s[i] == ':') {
            colonpos = i;
            break;
        }

    if (colonpos >= 0) {
        // we have a prefix
        DOMStringImpl* localName = _qualifiedName->copy();
        localName->ref();
        localName->remove(0,colonpos+1);
        m_id = doc->document()->tagId(_namespaceURI, localName, false /* allocate */);
        localName->deref();
        m_prefix = _qualifiedName->copy();
        m_prefix->ref();
        m_prefix->truncate(colonpos);
    }
    else {
        // no prefix
        m_id = doc->document()->tagId(_namespaceURI, _qualifiedName, false /* allocate */);
        m_prefix = 0;
    }
}

void CharacterDataImpl::detachString()
{
    // make a copy of our string so as not to interfere with other texts that use it
    DOMStringImpl *newStr = str->copy();
    newStr->ref();
    str->deref();
    str = newStr;
}

void IDTableBase::addHiddenMapping(unsigned id, const DOMString& name)
{
    DOMStringImpl* nameImpl = name.implementation();
    if (nameImpl) nameImpl->ref();

    if (id >= m_mappings.size())
        m_mappings.resize(id + 1);
    m_mappings[id] = Mapping(nameImpl);
    m_mappings[id].refCount = 1; // Pin it.
}

void HTMLFontElementImpl::parseAttribute(AttributeImpl *attr)
{
    switch(attr->id())
    {
    case ATTR_SIZE:
    {
        DOMStringImpl* v = attr->val();
        if(v) {
            const QChar* s = v->s;
            int num = v->toInt();
            int len = v->l;
            while( len && s->isSpace() )
              len--,s++;
            if ( len && *s == '+' )
                num += 3;
            int size;
            switch (num)
            {
            case -2:
            case  1: size = CSS_VAL_XX_SMALL;  break;
            case -1:
            case  2: size = CSS_VAL_SMALL;    break;
            case  0: // treat 0 the same as 3, because people
                     // expect it to be between -1 and +1
            case  3: size = CSS_VAL_MEDIUM;   break;
            case  4: size = CSS_VAL_LARGE;    break;
            case  5: size = CSS_VAL_X_LARGE;  break;
            case  6: size = CSS_VAL_XX_LARGE; break;
            default:
                if (num > 6)
                    size = CSS_VAL__KHTML_XXX_LARGE;
                else
                    size = CSS_VAL_XX_SMALL;
            }
            addCSSProperty(CSS_PROP_FONT_SIZE, size);
        }
        break;
    }
    case ATTR_COLOR:
        addHTMLColor(CSS_PROP_COLOR, attr->value());
        break;
    case ATTR_FACE:
        addCSSProperty(CSS_PROP_FONT_FAMILY, attr->value());
        break;
    default:
        HTMLElementImpl::parseAttribute(attr);
    }
}

void CharacterDataImpl::dispatchModifiedEvent(DOMStringImpl *prevValue)
{
    if (parentNode())
        parentNode()->childrenChanged();
    if (!getDocument()->hasListenerType(DocumentImpl::DOMCHARACTERDATAMODIFIED_LISTENER))
        return;

    DOMStringImpl *newValue = str->copy();
    newValue->ref();
    int exceptioncode = 0;
    MutationEventImpl* const evt = new MutationEventImpl(EventImpl::DOMCHARACTERDATAMODIFIED_EVENT,true,false,0,prevValue,newValue,DOMString(),0);
    evt->ref();
    dispatchEvent(evt,exceptioncode);
    evt->deref();
    newValue->deref();
    dispatchSubtreeModifiedEvent();
}

void CharacterDataImpl::setData( const DOMString &_data, int &exceptioncode )
{
    // 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?
    DOMStringImpl *oldStr = str;
    str = _data.impl;
    if(str) str->ref();
    if (m_render)
      (static_cast<RenderText*>(m_render))->setText(str);
    setChanged(true);

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

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

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

    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();
}

TextImpl *TextImpl::splitText( 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.

    // ### 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)
    if (offset > str->l || (long)offset < 0) {
        exceptioncode = DOMException::INDEX_SIZE_ERR;
        return 0;
    }

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

    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();

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

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

// ### make sure we undo what we did during detach
void HTMLHRElementImpl::attach()
{
    if (attributes(true /* readonly */)) {
        // there are some attributes, lets check
        DOMString color = getAttribute(ATTR_COLOR);
        DOMStringImpl* si = getAttribute(ATTR_SIZE).implementation();
        int _s =  si ? si->toInt() : -1;
        DOMString n("1");
        if (!color.isNull()) {
            addCSSProperty(CSS_PROP_BORDER_TOP_STYLE, CSS_VAL_SOLID);
            addCSSProperty(CSS_PROP_BORDER_RIGHT_STYLE, CSS_VAL_SOLID);
            addCSSProperty(CSS_PROP_BORDER_BOTTOM_STYLE, CSS_VAL_SOLID);
            addCSSProperty(CSS_PROP_BORDER_LEFT_STYLE, CSS_VAL_SOLID);
            addCSSProperty(CSS_PROP_BORDER_TOP_WIDTH, DOMString("0"));
            addCSSLength(CSS_PROP_BORDER_BOTTOM_WIDTH, DOMString(si));
            addHTMLColor(CSS_PROP_BORDER_COLOR, color);
        }
        else {
            if (_s > 1 && getAttribute(ATTR_NOSHADE).isNull()) {
                addCSSProperty(CSS_PROP_BORDER_BOTTOM_WIDTH, n);
                addCSSProperty(CSS_PROP_BORDER_TOP_WIDTH, n);
                addCSSProperty(CSS_PROP_BORDER_LEFT_WIDTH, n);
                addCSSProperty(CSS_PROP_BORDER_RIGHT_WIDTH, n);
                addCSSLength(CSS_PROP_HEIGHT, DOMString(QString::number(_s-2)));
            }
            else if (_s >= 0) {
                addCSSProperty(CSS_PROP_BORDER_TOP_WIDTH, DOMString(QString::number(_s)));
                addCSSProperty(CSS_PROP_BORDER_BOTTOM_WIDTH, DOMString("0"));
            }
        }
        if (_s == 0)
            addCSSProperty(CSS_PROP_MARGIN_BOTTOM, n);
    }

    HTMLElementImpl::attach();
}

void CharacterDataImpl::dispatchModifiedEvent(DOMStringImpl *prevValue)
{
    if (parentNode())
        parentNode()->childrenChanged();
    if ((str->length() == 0) != (prevValue->length() == 0)) {
       // changes in emptiness triggers changes in :empty selector
       if (parentNode() && parentNode()->isElementNode())
           parentNode()->backwardsStructureChanged();
       // ### to fully support dynamic changes to :contains selector
       // backwardsStructureChanged should be called for all changes
    }
    if (!document()->hasListenerType(DocumentImpl::DOMCHARACTERDATAMODIFIED_LISTENER))
        return;

    DOMStringImpl *newValue = str->copy();
    newValue->ref();
    int exceptioncode = 0;
    MutationEventImpl* const evt = new MutationEventImpl(EventImpl::DOMCHARACTERDATAMODIFIED_EVENT,true,false,0,prevValue,newValue,DOMString(),0);
    evt->ref();
    dispatchEvent(evt,exceptioncode);
    evt->deref();
    newValue->deref();
    dispatchSubtreeModifiedEvent();
}

void ProspectiveTokenizer::processAttribute()
{
    DOMStringImpl tagNameDS(DOMStringImpl::ShallowCopy, m_tagName.data(), m_tagName.size());
    LocalName tagLocal = LocalName::fromString(&tagNameDS, IDS_NormalizeLower);
    uint tag = tagLocal.id();

    switch (tag) {
    case ID_SCRIPT:
    case ID_IMAGE:
    case ID_IMG:
    {
        DOMStringImpl attrDS(DOMStringImpl::ShallowCopy, m_attributeName.data(), m_attributeName.size());
        LocalName attrLocal = LocalName::fromString(&attrDS, IDS_NormalizeLower);
        uint attribute = attrLocal.id();
        if (attribute == localNamePart(ATTR_SRC) && m_urlToLoad.isEmpty())
            m_urlToLoad = parseURL(DOMString(m_attributeValue.data(), m_attributeValue.size()));
        break;
    }
    case ID_LINK:
    {
        DOMStringImpl attrDS(DOMStringImpl::ShallowCopy, m_attributeName.data(), m_attributeName.size());
        LocalName attrLocal = LocalName::fromString(&attrDS, IDS_NormalizeLower);
        uint attribute = attrLocal.id();
        if (attribute == localNamePart(ATTR_HREF) && m_urlToLoad.isEmpty())
            m_urlToLoad = parseURL(DOMString(m_attributeValue.data(), m_attributeValue.size()));
        else if (attribute == localNamePart(ATTR_REL)) {
            DOMStringImpl* lowerAttribute = DOMStringImpl(DOMStringImpl::ShallowCopy, m_attributeValue.data(), m_attributeValue.size()).lower();
            QString val = lowerAttribute->string();
            delete lowerAttribute;
            m_linkIsStyleSheet = val.contains("stylesheet") && !val.contains("alternate") && !val.contains("icon");
        }
    }
    default:
        break;
    }
}

void RenderStyle::setContent(DOMStringImpl* s, bool add)
{
    if (!s)
        return; // The string is null. Nothing to do. Just bail.
    
    ContentData* lastContent = content;
    while (lastContent && lastContent->_nextContent)
        lastContent = lastContent->_nextContent;

    bool reuseContent = !add;
    if (add) {
        if (!lastContent)
            return; // Something's wrong.  We had no previous content, and we should have.

        if (lastContent->_contentType == CONTENT_TEXT) {
            // We can augment the existing string and share this ContentData node.
            DOMStringImpl* oldStr = lastContent->_content.text;
            DOMStringImpl* newStr = oldStr->copy();
            newStr->ref();
            oldStr->deref();
            newStr->append(s);
            lastContent->_content.text = newStr;
            return;
        }
    }

    ContentData* newContentData = 0;
    if (reuseContent && content) {
        content->clearContent();
        newContentData = content;
    }
    else
        newContentData = new ContentData;
    
    if (lastContent && !reuseContent)
        lastContent->_nextContent = newContentData;
    else
        content = newContentData;
    
    newContentData->_content.text = s;
    newContentData->_content.text->ref();
    newContentData->_contentType = CONTENT_TEXT;
}

void RenderStyle::addContent(DOM::DOMStringImpl *s)
{
    if(!s)
        return; // The string is null. Nothing to do. Just bail.

    StyleGeneratedData *t_generated = generated.access();

    ContentData *lastContent = t_generated->content;
    while(lastContent && lastContent->_nextContent)
        lastContent = lastContent->_nextContent;

    if(lastContent)
    {
        if(lastContent->_contentType == CONTENT_TEXT)
        {
            // We can augment the existing string and share this ContentData node.
            DOMStringImpl *oldStr = lastContent->_content.text;
            DOMStringImpl *newStr = oldStr->copy();
            newStr->ref();
            oldStr->deref();
            newStr->append(s);
            lastContent->_content.text = newStr;
            return;
        }
    }

    ContentData *newContentData = new ContentData;

    if(lastContent)
        lastContent->_nextContent = newContentData;
    else
        t_generated->content = newContentData;

    newContentData->_content.text = s;
    newContentData->_content.text->ref();
    newContentData->_contentType = CONTENT_TEXT;
}

void RenderText::setText(DOMStringImpl *text, bool force)
{
    if( !force && str == text ) return;

    DOMStringImpl *oldstr = str;
    if(text && style())
        str = text->collapseWhiteSpace(style()->preserveLF(), style()->preserveWS());
    else
        str = text;
    if(str) str->ref();
    if(oldstr) oldstr->deref();

    if ( str && style() ) {
        oldstr = str;
        switch(style()->textTransform()) {
        case CAPITALIZE:
        {
            RenderObject *o;
            bool runOnString = false;

            // find previous non-empty text renderer if one exists
            for (o = previousRenderer(); o; o = o->previousRenderer()) {
                if (!o->isInlineFlow()) {
                    if (!o->isText())
                        break;

                    DOMStringImpl *prevStr = static_cast<RenderText*>(o)->string();
                    // !prevStr can happen with css like "content:open-quote;"
                    if (!prevStr)
                        break;

                    if (prevStr->length() == 0)
                        continue;
                    QChar c = (*prevStr)[prevStr->length() - 1];
                    if (!c.isSpace())
                        runOnString = true;

                    break;
                }
            }

            str = str->capitalize(runOnString);
        }
        break;

		
		
        case UPPERCASE: str = str->upper();       break;
        case LOWERCASE: str = str->lower();       break;
        case NONE:
        default:;
    }
        str->ref();
        oldstr->deref();
    }

    // ### what should happen if we change the text of a
    // RenderBR object ?
    KHTMLAssert(!isBR() || (str->l == 1 && (*str->s) == '\n'));
    KHTMLAssert(!str->l || str->s);

    setNeedsLayoutAndMinMaxRecalc();
#ifdef BIDI_DEBUG
    QConstString cstr(str->s, str->l);
    kdDebug( 6040 ) << "RenderText::setText( " << cstr.string().length() << " ) '" << cstr.string() << "'" << endl;
#endif
}