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Java > Open Source Codes > com > jcorporate > expresso > ext > struts > taglib > html > ExHtmlTag


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64
65 package com.jcorporate.expresso.ext.struts.taglib.html;
66
67 import com.jcorporate.expresso.core.controller.ControllerException;
68 import com.jcorporate.expresso.core.controller.ControllerResponse;
69 import com.jcorporate.expresso.core.i18n.Messages;
70 import com.jcorporate.expresso.core.misc.StringUtil;
71 import com.jcorporate.expresso.ext.struts.taglib.ControllerUtils;
72 import org.apache.struts.taglib.html.HtmlTag;
73 import org.apache.struts.util.ResponseUtils;
74
75 import javax.servlet.ServletResponse JavaDoc;
76 import javax.servlet.jsp.JspException JavaDoc;
77 import javax.servlet.jsp.PageContext JavaDoc;
78 import java.util.Locale JavaDoc;
79
80
81 /**
82  * Renders an HTML <html> element. This extended version uses the
83  * Expresso mechanism for determining the user's current locale/character
84  * set, and establishes those for this page
85  */

86 public class ExHtmlTag
87         extends HtmlTag {
88     // --------------------------------------------------------- Public Methods
89
/**
90      * Process the start of this tag.
91      *
92      * @return integer as defined in the standard tag library framework.
93      * @throws JspException if a JSP exception has occurred
94      */

95     public int doStartTag()
96             throws JspException JavaDoc {
97         ControllerResponse myResponse = ControllerUtils.getResponse(pageContext);
98         String JavaDoc charset = "";
99         Locale JavaDoc l = null;
100
101         if (myResponse != null) {
102             try {
103                 charset = StringUtil.notNull(myResponse.getString("charset"));
104                 l = myResponse.getLocale();
105             } catch (ControllerException ce) {
106                 ce.printStackTrace(System.out);
107                 throw new JspException JavaDoc(ce.getMessage());
108             }
109         } else {
110             l = (Locale JavaDoc) pageContext.getAttribute(Messages.LOCALE_KEY,
111                     PageContext.SESSION_SCOPE);
112
113             if (l == null) {
114                 l = Locale.getDefault();
115             }
116             charset = Messages.getString(l, "charset");
117         }
118         if (charset.equals("")) {
119             charset = "ISO-8859-1";
120         }
121
122         ServletResponse JavaDoc res = pageContext.getResponse();
123         res.setContentType("text/html;charset=" + charset);
124
125         StringBuffer JavaDoc sb = new StringBuffer JavaDoc("<html");
126
127         // Use the current Locale to set our language preferences
128
Locale JavaDoc currentLocale = l;
129
130         if (currentLocale != null) {
131             String JavaDoc lang = currentLocale.getLanguage();
132
133             if ((lang != null) && (lang.length() > 0)) {
134                 sb.append(" lang=\"");
135                 sb.append(lang);
136                 sb.append("\"");
137
138                 if (xhtml) {
139                     sb.append(" xml:lang=\"");
140                     sb.append(lang);
141                     sb.append("\"");
142                 }
143             }
144         }
145
146         sb.append(">");
147         sb.append("\n<meta http-equiv=\"Content-Type\" content=\"text/" +
148                 "html;charset=" + charset + "\">");
149
150         // Write out the beginning tag for this page
151
ResponseUtils.write(pageContext, sb.toString());
152
153         // Evaluate the included content of this tag
154
return (EVAL_BODY_INCLUDE);
155     }
156 }
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