# khtml Library API Documentation

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# html_headimpl.cpp

    00001
    00023 // -------------------------------------------------------------------------
    00024
    00025 #include "html/html_headimpl.h"
    00026 #include "html/html_documentimpl.h"
    00027 #include "xml/dom_textimpl.h"
    00028
    00029 #include "khtmlview.h"
    00030 #include "khtml_part.h"
    00031
    00032 #include "misc/htmlhashes.h"
    00033 #include "misc/loader.h"
    00034 #include "misc/helper.h"
    00035
    00036 #include "css/cssstyleselector.h"
    00037 #include "css/css_stylesheetimpl.h"
    00038 #include "css/csshelper.h"
    00039
    00040 #include <kurl.h>
    00041 #include <kdebug.h>
    00042
    00043 using namespace khtml;
    00044
    00045 NodeImpl::Id HTMLBaseElementImpl::id() const
    00046 {
    00047     return ID_BASE;
    00048 }
    00049
    00050 void HTMLBaseElementImpl::parseAttribute(AttributeImpl *attr)
    00051 {
    00052     switch(attr->id())
    00053     {
    00054     case ATTR_HREF:
    00055         m_href = khtml::parseURL(attr->value());
    00056         process();
    00057         break;
    00058     case ATTR_TARGET:
    00059         m_target = attr->value();
    00060         process();
    00061         break;
    00062     default:
    00063         HTMLElementImpl::parseAttribute(attr);
    00064     }
    00065 }
    00066
    00067 void HTMLBaseElementImpl::insertedIntoDocument()
    00068 {
    00069     HTMLElementImpl::insertedIntoDocument();
    00070     process();
    00071 }
    00072
    00073 void HTMLBaseElementImpl::removedFromDocument()
    00074 {
    00075     HTMLElementImpl::removedFromDocument();
    00076
    00077     // Since the document doesn't have a base element...
    00078     // (This will break in the case of multiple base elements, but that's not valid anyway (?))
    00079     getDocument()->setBaseURL( QString::null );
    00080     getDocument()->setBaseTarget( QString::null );
    00081 }
    00082
    00083 void HTMLBaseElementImpl::process()
    00084 {
    00085     if (!inDocument())
    00086         return;
    00087
    00088     if(!m_href.isEmpty())
    00089         getDocument()->setBaseURL( KURL( getDocument()->view()->part()->url(), m_href.string() ).url() );
    00090
    00091     if(!m_target.isEmpty())
    00092         getDocument()->setBaseTarget( m_target.string() );
    00093
    00094     // ### should changing a document's base URL dynamically automatically update all images, stylesheets etc?
    00095 }
    00096
    00097 // -------------------------------------------------------------------------
    00098
    00099
    00100 HTMLLinkElementImpl::~HTMLLinkElementImpl()
    00101 {
    00102     if(m_sheet) m_sheet->deref();
    00103     if(m_cachedSheet) m_cachedSheet->deref(this);
    00104 }
    00105
    00106 NodeImpl::Id HTMLLinkElementImpl::id() const
    00107 {
    00108     return ID_LINK;
    00109 }
    00110
    00111 void HTMLLinkElementImpl::parseAttribute(AttributeImpl *attr)
    00112 {
    00113     switch (attr->id())
    00114     {
    00115     case ATTR_REL:
    00116         m_rel = attr->value();
    00117         process();
    00118         break;
    00119     case ATTR_HREF:
    00120         m_url = getDocument()->completeURL( khtml::parseURL(attr->value()).string() );
    00121         process();
    00122         break;
    00123     case ATTR_TYPE:
    00124         m_type = attr->value();
    00125         process();
    00126         break;
    00127     case ATTR_MEDIA:
    00128         m_media = attr->value().string().lower();
    00129         process();
    00130         break;
    00131     case ATTR_DISABLED:
    00132         // ###
    00133         break;
    00134     default:
    00135         HTMLElementImpl::parseAttribute(attr);
    00136     }
    00137 }
    00138
    00139 void HTMLLinkElementImpl::process()
    00140 {
    00141     if (!inDocument())
    00142         return;
    00143
    00144     QString type = m_type.string().lower();
    00145     QString rel = m_rel.string().lower();
    00146
    00147     KHTMLPart* part = getDocument()->view() ? getDocument()->view()->part() : 0;
    00148
    00149     // IE extension: location of small icon for locationbar / bookmarks
    00150     // Uses both "shortcut icon" and "icon"
    00151
    00152     if ( part && rel.contains("icon") && !m_url.isEmpty() && !part->parentPart())
    00153         part->browserExtension()->setIconURL( KURL(m_url.string()) );
    00154
    00155     // Stylesheet
    00156     if(type.contains("text/css") || rel.contains("stylesheet")) {
    00157         // no need to load style sheets which aren't for the screen output
    00158         // ### there may be in some situations e.g. for an editor or script to manipulate
    00159         if( m_media.isNull() || m_media.contains("screen") || m_media.contains("all") || m_media.contains("print") ) {
    00160             m_loading = true;
    00161             QString chset = getAttribute( ATTR_CHARSET ).string();
    00162             if (m_cachedSheet)
    00163                 m_cachedSheet->deref(this);
    00164             m_cachedSheet = getDocument()->docLoader()->requestStyleSheet(m_url, chset);
    00165             if (m_cachedSheet)
    00166                 m_cachedSheet->ref(this);
    00167         }
    00168     }
    00169     else if (m_sheet) {
    00170         // we no longer contain a stylesheet, e.g. perhaps rel or type was changed
    00171         m_sheet->deref();
    00172         m_sheet = 0;
    00173         getDocument()->updateStyleSelector();
    00174     }
    00175 }
    00176
    00177 void HTMLLinkElementImpl::insertedIntoDocument()
    00178 {
    00179     HTMLElementImpl::insertedIntoDocument();
    00180     process();
    00181 }
    00182
    00183 void HTMLLinkElementImpl::removedFromDocument()
    00184 {
    00185     HTMLElementImpl::removedFromDocument();
    00186     process();
    00187 }
    00188
    00189 void HTMLLinkElementImpl::setStyleSheet(const DOM::DOMString &url, const DOM::DOMString &sheetStr)
    00190 {
    00191 //    kdDebug( 6030 ) << "HTMLLinkElement::setStyleSheet()" << endl;
    00192 //    kdDebug( 6030 ) << "**** current medium: " << m_media << endl;
    00193
    00194     if (m_sheet)
    00195         m_sheet->deref();
    00196     m_sheet = new CSSStyleSheetImpl(this, url);
    00197     kdDebug( 6030 ) << "style sheet parse mode strict = " << ( getDocument()->parseMode() == DocumentImpl::Strict ) << endl;
    00198     m_sheet->ref();
    00199     m_sheet->parseString( sheetStr, getDocument()->parseMode() == DocumentImpl::Strict );
    00200
    00201     MediaListImpl *media = new MediaListImpl( m_sheet, m_media );
    00202     m_sheet->setMedia( media );
    00203
    00204     m_loading = false;
    00205
    00206     getDocument()->updateStyleSelector();
    00207 }
    00208
    00209 bool HTMLLinkElementImpl::isLoading() const
    00210 {
    00211 //    kdDebug( 6030 ) << "link: checking if loading!" << endl;
    00212     if(m_loading) return true;
    00213     if(!m_sheet) return false;
    00214     //if(!m_sheet->isCSSStyleSheet()) return false;
    00215     return static_cast<CSSStyleSheetImpl *>(m_sheet)->isLoading();
    00216 }
    00217
    00218 void HTMLLinkElementImpl::sheetLoaded()
    00219 {
    00220     getDocument()->updateStyleSelector();
    00221 }
    00222
    00223 // -------------------------------------------------------------------------
    00224
    00225 NodeImpl::Id HTMLMetaElementImpl::id() const
    00226 {
    00227     return ID_META;
    00228 }
    00229
    00230 void HTMLMetaElementImpl::parseAttribute(AttributeImpl *attr)
    00231 {
    00232     switch(attr->id())
    00233     {
    00234     case ATTR_HTTP_EQUIV:
    00235         m_equiv = attr->value();
    00236         process();
    00237         break;
    00238     case ATTR_CONTENT:
    00239         m_content = attr->value();
    00240         process();
    00241         break;
    00242     case ATTR_NAME:
    00243       break;
    00244     default:
    00245         HTMLElementImpl::parseAttribute(attr);
    00246     }
    00247 }
    00248
    00249 void HTMLMetaElementImpl::insertedIntoDocument()
    00250 {
    00251     HTMLElementImpl::insertedIntoDocument();
    00252     process();
    00253 }
    00254
    00255 void HTMLMetaElementImpl::process()
    00256 {
    00257     // Get the document to process the tag, but only if we're actually part of DOM tree (changing a meta tag while
    00258     // it's not in the tree shouldn't have any effect on the document)
    00259     if (inDocument() && !m_equiv.isNull() && !m_content.isNull())
    00260         getDocument()->processHttpEquiv(m_equiv,m_content);
    00261 }
    00262
    00263 // -------------------------------------------------------------------------
    00264
    00265 NodeImpl::Id HTMLScriptElementImpl::id() const
    00266 {
    00267     return ID_SCRIPT;
    00268 }
    00269
    00270 DOMString HTMLScriptElementImpl::text() const
    00271 {
    00272     if (firstChild() && firstChild()->nodeType() == Node::TEXT_NODE) {
    00273         return firstChild()->nodeValue();
    00274     }
    00275     return "";
    00276 }
    00277
    00278 void HTMLScriptElementImpl::setText(const DOMString& str)
    00279 {
    00280     int exceptioncode = 0;
    00281     if (firstChild() && firstChild()->nodeType() == Node::TEXT_NODE) {
    00282         static_cast<DOM::TextImpl *>(firstChild())->setData(str, exceptioncode);
    00283         return;
    00284     }
    00285     // No child text node found, creating one
    00286     DOM::TextImpl* t = getDocument()->createTextNode(str.implementation());
    00287     appendChild(t, exceptioncode);
    00288 }
    00289
    00290 // -------------------------------------------------------------------------
    00291
    00292 HTMLStyleElementImpl::~HTMLStyleElementImpl()
    00293 {
    00294     if(m_sheet) m_sheet->deref();
    00295 }
    00296
    00297 NodeImpl::Id HTMLStyleElementImpl::id() const
    00298 {
    00299     return ID_STYLE;
    00300 }
    00301
    00302 // other stuff...
    00303 void HTMLStyleElementImpl::parseAttribute(AttributeImpl *attr)
    00304 {
    00305     switch (attr->id())
    00306     {
    00307     case ATTR_TYPE:
    00308     case ATTR_MEDIA:
    00309         break;
    00310     default:
    00311         HTMLElementImpl::parseAttribute(attr);
    00312     }
    00313 }
    00314
    00315 void HTMLStyleElementImpl::insertedIntoDocument()
    00316 {
    00317     HTMLElementImpl::insertedIntoDocument();
    00318     getDocument()->updateStyleSelector();
    00319 }
    00320
    00321 void HTMLStyleElementImpl::removedFromDocument()
    00322 {
    00323     HTMLElementImpl::removedFromDocument();
    00324     getDocument()->updateStyleSelector();
    00325 }
    00326
    00327 void HTMLStyleElementImpl::childrenChanged()
    00328 {
    00329     HTMLElementImpl::childrenChanged();
    00330
    00331     DOMString text = "";
    00332
    00333     for (NodeImpl *c = firstChild(); c != 0; c = c->nextSibling()) {
    00334         if ((c->nodeType() == Node::TEXT_NODE) ||
    00335             (c->nodeType() == Node::CDATA_SECTION_NODE) ||
    00336             (c->nodeType() == Node::COMMENT_NODE))
    00337             text += c->nodeValue();
    00338     }
    00339
    00340     if(m_sheet)
    00341         m_sheet->deref();
    00342     m_sheet = new CSSStyleSheetImpl(this);
    00343     m_sheet->ref();
    00344     m_sheet->parseString( text, (getDocument()->parseMode() == DocumentImpl::Strict) );
    00345     getDocument()->updateStyleSelector();
    00346 }
    00347
    00348 bool HTMLStyleElementImpl::isLoading() const
    00349 {
    00350     if(!m_sheet) return false;
    00351     return static_cast<CSSStyleSheetImpl *>(m_sheet)->isLoading();
    00352 }
    00353
    00354 void HTMLStyleElementImpl::sheetLoaded()
    00355 {
    00356     getDocument()->updateStyleSelector();
    00357 }
    00358
    00359 // -------------------------------------------------------------------------
    00360
    00361 NodeImpl::Id HTMLTitleElementImpl::id() const
    00362 {
    00363     return ID_TITLE;
    00364 }
    00365
    00366 void HTMLTitleElementImpl::insertedIntoDocument()
    00367 {
    00368     HTMLElementImpl::insertedIntoDocument();
    00369     getDocument()->setTitle(m_title);
    00370 }
    00371
    00372 void HTMLTitleElementImpl::removedFromDocument()
    00373 {
    00374     HTMLElementImpl::removedFromDocument();
    00375     // Title element removed, so we have no title... we ignore the case of multiple title elements, as it's invalid
    00376     // anyway (?)
    00377     getDocument()->setTitle(DOMString());
    00378 }
    00379
    00380 void HTMLTitleElementImpl::childrenChanged()
    00381 {
    00382     HTMLElementImpl::childrenChanged();
    00383
    00384     m_title = "";
    00385     for (NodeImpl *c = firstChild(); c != 0; c = c->nextSibling()) {
    00386         if ((c->nodeType() == Node::TEXT_NODE) || (c->nodeType() == Node::CDATA_SECTION_NODE))
    00387             m_title += c->nodeValue();
    00388     }
    00389     if (inDocument())
    00390         getDocument()->setTitle(m_title);
    00391 }
    00392
    00393 DOMString HTMLTitleElementImpl::text()
    00394 {
    00395     if (firstChild() && firstChild()->nodeType() == Node::TEXT_NODE) {
    00396         return firstChild()->nodeValue();
    00397     }
    00398     return "";
    00399 }
    00400
    00401 void HTMLTitleElementImpl::setText( const DOMString& str )
    00402 {
    00403     int exceptioncode = 0;
    00404     // Look for an existing text child node
    00405     DOM::NodeListImpl* nl(childNodes());
    00406     if (nl)
    00407     {
    00408         for (unsigned int i = 0; i < nl->length(); i++) {
    00409             if (nl->item(i)->nodeType() == DOM::Node::TEXT_NODE) {
    00410                 static_cast<DOM::TextImpl *>(nl->item(i))->setData(str, exceptioncode);
    00411                 return;
    00412             }
    00413         }
    00414         delete nl;
    00415     }
    00416     // No child text node found, creating one
    00417     DOM::TextImpl* t = getDocument()->createTextNode(str.implementation());
    00418     appendChild(t, exceptioncode);
    00419 }

This file is part of the documentation for kdelibs Version 3.1.5.
Documentation copyright © 1996-2002 the KDE developers.
Generated on Wed Jan 28 13:33:54 2004 by doxygen 1.3.4 written by Dimitri van Heesch, © 1997-2001