Merged gcj-eclipse branch to trunk.

From-SVN: r120621

libjava/classpath/javax/swing/text/html/FrameView.java

@@ -0,0 +1,233 @@
+/* FrameView.java -- Renders HTML frame tags
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing.text.html;
+
+import java.awt.Component;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import javax.swing.JEditorPane;
+import javax.swing.event.HyperlinkEvent;
+import javax.swing.event.HyperlinkListener;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.ComponentView;
+import javax.swing.text.Element;
+import javax.swing.text.View;
+
+/**
+ * A view that is responsible for rendering HTML frame tags.
+ * This is accomplished by a specialized {@link ComponentView}
+ * that embeds a JEditorPane with an own document.
+ */
+class FrameView
+  extends ComponentView
+  implements HyperlinkListener
+{
+
+  /**
+   * Creates a new FrameView for the specified element.
+   *
+   * @param el the element for the view
+   */
+  FrameView(Element el)
+  {
+    super(el);
+  }
+
+  /**
+   * Creates the element that will be embedded in the view.
+   * This will be a JEditorPane with the appropriate content set.
+   *
+   * @return the element that will be embedded in the view
+   */
+  protected Component createComponent()
+  {
+    Element el = getElement();
+    AttributeSet atts = el.getAttributes();
+    JEditorPane html = new JEditorPane();
+    html.addHyperlinkListener(this);
+    URL base = ((HTMLDocument) el.getDocument()).getBase();
+    String srcAtt = (String) atts.getAttribute(HTML.Attribute.SRC);
+    if (srcAtt != null && ! srcAtt.equals(""))
+      {
+        try
+          {
+            URL page = new URL(base, srcAtt);
+            html.setPage(page);
+            ((HTMLDocument) html.getDocument()).setFrameDocument(true);
+          }
+        catch (MalformedURLException ex)
+          {
+            // Leave page empty.
+          }
+        catch (IOException ex)
+          {
+            // Leave page empty.
+          }
+      }
+    return html;
+  }
+
+  /**
+   * Catches hyperlink events on that frame's editor and forwards it to
+   * the outermost editorpane.
+   */
+  public void hyperlinkUpdate(HyperlinkEvent event)
+  {
+    JEditorPane outer = getTopEditorPane();
+    if (outer != null)
+      {
+        if (event instanceof HTMLFrameHyperlinkEvent)
+          {
+            HTMLFrameHyperlinkEvent hfhe = (HTMLFrameHyperlinkEvent) event;
+            if (hfhe.getEventType() == HyperlinkEvent.EventType.ACTIVATED)
+              {
+                String target = hfhe.getTarget();
+                if (event instanceof FormSubmitEvent)
+                  {
+                    handleFormSubmitEvent(hfhe, outer, target);
+                  }
+                else // No FormSubmitEvent.
+                  {
+                    handleHyperlinkEvent(hfhe, outer, target);
+                  }
+              }
+          }
+        else
+          {
+            // Simply forward this event.
+            outer.fireHyperlinkUpdate(event);
+          }
+      }
+  }
+
+  /**
+   * Handles normal hyperlink events.
+   *
+   * @param event the event
+   * @param outer the top editor
+   * @param target the target
+   */
+  private void handleHyperlinkEvent(HyperlinkEvent event,
+                                    JEditorPane outer, String target)
+  {
+    if (target.equals("_top"))
+      {
+        try
+          {
+            outer.setPage(event.getURL());
+          }
+        catch (IOException ex)
+          {
+            // Well...
+            ex.printStackTrace();
+          }
+      }
+    if (! outer.isEditable())
+      {
+        outer.fireHyperlinkUpdate
+          (new HTMLFrameHyperlinkEvent(outer,
+                                       event.getEventType(),
+                                       event.getURL(),
+                                       event.getDescription(),
+                                       getElement(),
+                                       target));
+      }
+  }
+
+  /**
+   * Handles form submit events.
+   *
+   * @param event the event
+   * @param outer the top editor
+   * @param target the target
+   */
+  private void handleFormSubmitEvent(HTMLFrameHyperlinkEvent event,
+                                     JEditorPane outer,
+                                     String target)
+  {
+    HTMLEditorKit kit = (HTMLEditorKit) outer.getEditorKit();
+    if (kit != null && kit.isAutoFormSubmission())
+      {
+        if (target.equals("_top"))
+          {
+            try
+              {
+                outer.setPage(event.getURL());
+              }
+            catch (IOException ex)
+              {
+                // Well...
+                ex.printStackTrace();
+              }
+          }
+        else
+          {
+            HTMLDocument doc =
+              (HTMLDocument) outer.getDocument();
+            doc.processHTMLFrameHyperlinkEvent(event);
+          }
+      }
+    else
+      {
+        outer.fireHyperlinkUpdate(event);
+      }
+  }
+
+  /**
+   * Determines the topmost editor in a nested frameset.
+   *
+   * @return the topmost editor in a nested frameset
+   */
+  private JEditorPane getTopEditorPane()
+  {
+    View parent = getParent();
+    View top = null;
+    while (parent != null)
+      {
+        if (parent instanceof FrameSetView)
+          top = parent;
+      }
+    JEditorPane editor = null;
+    if (top != null)
+      editor = (JEditorPane) top.getContainer();
+    return editor;
+  }
+}