1 files changed, 70 insertions, 0 deletions
diff --git a/BKUApplet/src/main/java/at/gv/egiz/bku/online/applet/ExternalHelpListener.java b/BKUApplet/src/main/java/at/gv/egiz/bku/online/applet/ExternalHelpListener.java
new file mode 100644
index 00000000..4d6d5851
--- /dev/null
+++ b/BKUApplet/src/main/java/at/gv/egiz/bku/online/applet/ExternalHelpListener.java
@@ -0,0 +1,70 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package at.gv.egiz.bku.online.applet;
+
+import java.applet.AppletContext;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.net.MalformedURLException;
+import java.net.URL;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ *
+ * @author clemens
+ */
+public class ExternalHelpListener implements ActionListener {
+
+  protected final static Log log = LogFactory.getLog(ExternalHelpListener.class);
+  protected AppletContext ctx;
+  protected String helpURLBase;
+  protected String locale;
+
+  public ExternalHelpListener(AppletContext ctx, URL helpURL, String locale) {
+    if (ctx == null) {
+      throw new RuntimeException("no applet context provided");
+    }
+    if (helpURL == null || "".equals(helpURL)) {
+      throw new RuntimeException("no help URL provided");
+    }
+    this.ctx = ctx;
+    this.helpURLBase = helpURL.toString();
+    this.locale = locale;
+  }
+
+  @Override
+  public void actionPerformed(ActionEvent e) {
+    log.debug("received help action: " + e.getActionCommand());
+    URL helpURL;
+    try {
+      String urlString = helpURLBase;
+      if (locale != null) {
+        urlString = appendParameter(urlString, "locale", locale);
+      } 
+      if (e.getActionCommand() != null && !"".equals(e.getActionCommand())) {
+        urlString = appendParameter(urlString, "topic", e.getActionCommand());
+      }
+      helpURL = new URL(urlString);
+    } catch (MalformedURLException ex) {
+      try {
+        log.error("failed to create help URL: " + ex.getMessage());
+        helpURL = new URL(helpURLBase);
+      } catch (MalformedURLException ex1) {
+        log.error("failed to create default help URL, requested help will not be displayed");
+        return;
+      }
+    }
+    ctx.showDocument(helpURL, "_blank");
+  }
+  
+  private String appendParameter(String url, String paramName, String paramValue) {
+    if (url.indexOf('?') < 0) {
+      return url + "?" + paramName + "=" + paramValue;
+    } else {
+      return url + "&" + paramName + "=" + paramValue;
+    }
+  }
+}