/*
GNU LESSER GENERAL PUBLIC LICENSE
Copyright (C) 2006 The Lobo Project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Contact info: lobochief@users.sourceforge.net
*/
package org.lobobrowser.html.domimpl;
import java.net.MalformedURLException;
import java.net.URL;
import org.w3c.dom.UserDataHandler;
import org.w3c.dom.css.CSSStyleSheet;
import org.w3c.dom.html2.*;
import org.lobobrowser.html.*;
import org.lobobrowser.html.style.*;
import org.lobobrowser.util.gui.*;
import com.steadystate.css.dom.*;
import java.util.logging.*;
public class HTMLLinkElementImpl extends HTMLAbstractUIElement implements
HTMLLinkElement {
private static final Logger logger = Logger.getLogger(HTMLLinkElementImpl.class.getName());
private static final boolean loggableInfo = logger.isLoggable(Level.INFO);
private CSSStyleSheet styleSheet;
public HTMLLinkElementImpl(String name) {
super(name);
}
private boolean disabled;
public boolean getDisabled() {
return this.disabled;
}
public void setDisabled(boolean disabled) {
this.disabled = disabled;
CSSStyleSheet sheet = this.styleSheet;
if(sheet != null) {
sheet.setDisabled(disabled);
}
}
public String getHref() {
String href = this.getAttribute("href");
return href == null ? "" : href;
}
public void setHref(String href) {
this.setAttribute("href", href);
}
public String getHreflang() {
return this.getAttribute("hreflang");
}
public void setHreflang(String hreflang) {
this.setAttribute("hreflang", hreflang);
}
public String getMedia() {
return this.getAttribute("media");
}
public void setMedia(String media) {
this.setAttribute("media", media);
}
public String getRel() {
return this.getAttribute("rel");
}
public void setRel(String rel) {
this.setAttribute("rel", rel);
}
public String getRev() {
return this.getAttribute("rev");
}
public void setRev(String rev) {
this.setAttribute("rev", rev);
}
public String getTarget() {
String target = this.getAttribute("target");
if(target != null) {
return target;
}
HTMLDocumentImpl doc = (HTMLDocumentImpl) this.document;
return doc == null ? null : doc.getDefaultTarget();
}
public void setTarget(String target) {
this.setAttribute("target", target);
}
public String getType() {
return this.getAttribute("type");
}
public void setType(String type) {
this.setAttribute("type", type);
}
public Object setUserData(String key, Object data, UserDataHandler handler) {
if(org.lobobrowser.html.parser.HtmlParser.MODIFYING_KEY.equals(key) && data != Boolean.TRUE) {
this.processLink();
}
else if(com.steadystate.css.dom.CSSStyleSheetImpl.KEY_DISABLED_CHANGED.equals(key)) {
this.informDocumentInvalid();
}
return super.setUserData(key, data, handler);
}
/**
* If the LINK refers to a stylesheet document, this method
* loads and parses it.
*/
protected void processLink() {
this.styleSheet = null;
String rel = this.getAttribute("rel");
if(rel != null) {
String cleanRel = rel.trim().toLowerCase();
boolean isStyleSheet = cleanRel.equals("stylesheet");
boolean isAltStyleSheet = cleanRel.equals("alternate stylesheet");
if(isStyleSheet || isAltStyleSheet) {
UserAgentContext uacontext = this.getUserAgentContext();
if(uacontext.isExternalCSSEnabled()) {
String media = this.getMedia();
if(CSSUtilities.matchesMedia(media, uacontext)) {
HTMLDocumentImpl doc = (HTMLDocumentImpl) this.getOwnerDocument();
try {
boolean liflag = loggableInfo;
long time1 = liflag ? System.currentTimeMillis() : 0;
try {
CSSStyleSheet sheet = CSSUtilities.parse(this, this.getHref(), doc, doc.getBaseURI(), false);
if(sheet != null) {
this.styleSheet = sheet;
if(sheet instanceof CSSStyleSheetImpl) {
CSSStyleSheetImpl sheetImpl = (CSSStyleSheetImpl) sheet;
if(isAltStyleSheet) {
sheetImpl.setDisabledOnly(true);
}
else {
sheetImpl.setDisabledOnly(this.disabled);
}
}
else {
if(isAltStyleSheet) {
sheet.setDisabled(true);
}
else {
sheet.setDisabled(this.disabled);
}
}
doc.addStyleSheet(sheet);
}
} finally {
if(liflag) {
long time2 = System.currentTimeMillis();
logger.info("processLink(): Loaded and parsed CSS (or attempted to) at URI=[" + this.getHref() + "] in " + (time2 - time1) + " ms.");
}
}
} catch(MalformedURLException mfe) {
this.warn("Will not parse CSS. URI=[" + this.getHref() + "] with BaseURI=[" + doc.getBaseURI() + "] does not appear to be a valid URI.");
} catch(Throwable err) {
this.warn("Unable to parse CSS. URI=[" + this.getHref() + "].", err);
}
}
}
}
}
}
public String getAbsoluteHref() {
HtmlRendererContext rcontext = this.getHtmlRendererContext();
if(rcontext != null) {
String href = this.getHref();
if(href != null && href.length() > 0) {
String target = this.getTarget();
try {
URL url = this.getFullURL(href);
return url == null ? null : url.toExternalForm();
} catch(MalformedURLException mfu) {
this.warn("Malformed URI: [" + href + "].", mfu);
}
}
}
return null;
}
public void navigate() {
if(this.disabled) {
return;
}
HtmlRendererContext rcontext = this.getHtmlRendererContext();
if(rcontext != null) {
String href = this.getHref();
if(href != null && href.length() > 0) {
String target = this.getTarget();
try {
URL url = this.getFullURL(href);
if(url == null) {
this.warn("Unable to resolve URI: [" + href + "].");
}
else {
rcontext.linkClicked(this, url, target);
}
} catch(MalformedURLException mfu) {
this.warn("Malformed URI: [" + href + "].", mfu);
}
}
}
}
private java.awt.Color getLinkColor() {
HTMLDocument doc = (HTMLDocument) this.document;
if(doc != null) {
HTMLBodyElement body = (HTMLBodyElement) doc.getBody();
if(body != null) {
String vlink = body.getVLink();
String link = body.getLink();
if(vlink != null || link != null) {
HtmlRendererContext rcontext = this.getHtmlRendererContext();
if(rcontext != null) {
boolean visited = rcontext.isVisitedLink(this);
String colorText = visited ? vlink : link;
if(colorText != null) {
return ColorFactory.getInstance().getColor(colorText);
}
}
}
}
}
return java.awt.Color.BLUE;
}
protected RenderState createRenderState(RenderState prevRenderState) {
if(this.hasAttribute("href")) {
prevRenderState = new TextDecorationRenderState(prevRenderState, RenderState.MASK_TEXTDECORATION_UNDERLINE);
prevRenderState = new ColorRenderState(prevRenderState, this.getLinkColor());
}
return super.createRenderState(prevRenderState);
}
public String toString() {
// Javascript code often depends on this being exactly href. See js9.html.
// To change, perhaps add method to AbstractScriptableDelegate.
return this.getHref();
}
}
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