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1
21 package org.lobobrowser.html.domimpl;
22
23 import java.net.MalformedURLException  ;
24 import java.net.URL ;
25 import org.w3c.dom.UserDataHandler ;
26 import org.w3c.dom.css.CSSStyleSheet;
27 import org.w3c.dom.html2.*;
28 import org.lobobrowser.html.HtmlRendererContext;
29 import org.lobobrowser.html.style.*;
30 import org.lobobrowser.util.gui.*;
31
32 import java.util.logging.*;
33
34 public class HTMLLinkElementImpl extends HTMLAbstractUIElement implements
35 HTMLLinkElement {
36 private static final Logger logger = Logger.getLogger(HTMLLinkElementImpl.class.getName());
37 private static final boolean loggableInfo = logger.isLoggable(Level.INFO);
38
39 public HTMLLinkElementImpl(String name) {
40 super(name);
41 }
42
43 private boolean disabled;
44
45 public boolean getDisabled() {
46 return this.disabled;
47 }
48
49 public void setDisabled(boolean disabled) {
50 this.disabled = disabled;
51 }
52
53 public String getHref() {
54 return this.getAttribute("href");
55 }
56
57 public void setHref(String href) {
58 this.setAttribute("href", href);
59 }
60
61 public String getHreflang() {
62 return this.getAttribute("hreflang");
63 }
64
65 public void setHreflang(String hreflang) {
66 this.setAttribute("hreflang", hreflang);
67 }
68
69 public String getMedia() {
70 return this.getAttribute("media");
71 }
72
73 public void setMedia(String media) {
74 this.setAttribute("media", media);
75 }
76
77 public String getRel() {
78 return this.getAttribute("rel");
79 }
80
81 public void setRel(String rel) {
82 this.setAttribute("rel", rel);
83 }
84
85 public String getRev() {
86 return this.getAttribute("rev");
87 }
88
89 public void setRev(String rev) {
90 this.setAttribute("rev", rev);
91 }
92
93 public String getTarget() {
94 String target = this.getAttribute("target");
95 if(target != null) {
96 return target;
97 }
98 HTMLDocumentImpl doc = (HTMLDocumentImpl) this.document;
99 return doc == null ? null : doc.getDefaultTarget();
100 }
101
102 public void setTarget(String target) {
103 this.setAttribute("target", target);
104 }
105
106 public String getType() {
107 return this.getAttribute("type");
108 }
109
110 public void setType(String type) {
111 this.setAttribute("type", type);
112 }
113
114 public Object setUserData(String key, Object data, UserDataHandler handler) {
115 if(org.lobobrowser.html.parser.HtmlParser.MODIFYING_KEY.equals(key) && data != Boolean.TRUE) {
116 this.processLink();
117 }
118 return super.setUserData(key, data, handler);
119 }
120
121 protected void processLink() {
122 String rel = this.getAttribute("rel");
123 if(rel != null && rel.toLowerCase().indexOf("stylesheet") != -1) {
124 String media = this.getMedia();
125 if(CSSUtilities.matchesMedia(media, this.getHtmlRendererContext())) {
126 HTMLDocumentImpl doc = (HTMLDocumentImpl) this.getOwnerDocument();
127 try {
128 boolean liflag = loggableInfo;
129 long time1 = liflag ? System.currentTimeMillis() : 0;
130 try {
131 CSSStyleSheet sheet = CSSUtilities.parse(this.getHref(), doc, doc.getBaseURI(), false);
132 if(sheet != null) {
133 doc.addStyleSheet(sheet);
134 }
135 } finally {
136 if(liflag) {
137 long time2 = System.currentTimeMillis();
138 logger.info("processLink(): Loaded and parsed CSS (or attempted to) at URI=[" + this.getHref() + "] in " + (time2 - time1) + " ms.");
139 }
140 }
141
142 } catch(MalformedURLException mfe) {
143 this.warn("Will not parse CSS. URI=[" + this.getHref() + "] with BaseURI=[" + doc.getBaseURI() + "] does not appear to be a valid URI.");
144 } catch(Throwable err) {
145 this.warn("Unable to parse CSS. URI=[" + this.getHref() + "].", err);
146 }
147 }
148 }
149 }
150
151 public void navigate() {
152 if(this.disabled) {
153 return;
154 }
155 HtmlRendererContext rcontext = this.getHtmlRendererContext();
156 if(rcontext != null) {
157 String href = this.getHref();
158 if(href != null && !"".equals(href)) {
159 String target = this.getTarget();
160 try {
161 URL url = this.getFullURL(href);
162 if(url == null) {
163 this.warn("Unable to resolve URI: [" + href + "].");
164 }
165 else {
166 rcontext.navigate(url, target);
167 }
168 } catch(MalformedURLException mfu) {
169 this.warn("Malformed URI: [" + href + "].", mfu);
170 }
171 }
172 }
173 }
174
175 private java.awt.Color getLinkColor() {
176 HTMLDocument doc = (HTMLDocument) this.document;
177 if(doc != null) {
178 HTMLBodyElement body = (HTMLBodyElement) doc.getBody();
179 if(body != null) {
180 String vlink = body.getVLink();
181 String link = body.getLink();
182 if(vlink != null || link != null) {
183 HtmlRendererContext rcontext = this.getHtmlRendererContext();
184 if(rcontext != null) {
185 boolean visited = rcontext.isVisitedLink(this);
186 String colorText = visited ? vlink : link;
187 if(colorText != null) {
188 return ColorFactory.getInstance().getColor(colorText);
189 }
190 }
191 }
192 }
193 }
194 return java.awt.Color.BLUE;
195 }
196
197 protected RenderState createRenderState(RenderState prevRenderState) {
198 prevRenderState = new TextDecorationRenderState(prevRenderState, RenderState.MASK_TEXTDECORATION_UNDERLINE);
199 prevRenderState = new ColorRenderState(prevRenderState, this.getLinkColor());
200 return super.createRenderState(prevRenderState);
201 }
202 }
203 |
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