1 files changed, 360 insertions, 0 deletions
diff --git a/BKUCommonGUI/src/main/java/at/gv/egiz/bku/gui/SecureViewerDialog.java b/BKUCommonGUI/src/main/java/at/gv/egiz/bku/gui/SecureViewerDialog.java
new file mode 100644
index 00000000..7db70c46
--- /dev/null
+++ b/BKUCommonGUI/src/main/java/at/gv/egiz/bku/gui/SecureViewerDialog.java
@@ -0,0 +1,360 @@
+/*
+ * Copyright 2008 Federal Chancellery Austria and
+ * Graz University of Technology
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package at.gv.egiz.bku.gui;
+
+import at.gv.egiz.bku.gui.viewer.FontProvider;
+import at.gv.egiz.bku.gui.viewer.SecureViewerSaveDialog;
+import at.gv.egiz.stal.HashDataInput;
+import java.awt.Container;
+import java.awt.Cursor;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.Frame;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.FocusAdapter;
+import java.awt.event.FocusEvent;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.nio.charset.Charset;
+import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.ResourceBundle;
+import javax.swing.GroupLayout;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JDialog;
+import javax.swing.JEditorPane;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.LayoutStyle;
+import javax.swing.WindowConstants;
+import javax.swing.text.Document;
+import javax.swing.text.EditorKit;
+import javax.swing.text.StyledEditorKit;
+import javax.swing.text.html.HTMLEditorKit;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ *
+ * @author Clemens Orthacker <clemens.orthacker@iaik.tugraz.at>
+ */
+public class SecureViewerDialog extends JDialog {
+
+  /** don't import BKUFonts in order not to load BKUFonts.jar
+   * BKUApplet includes BKUFonts as runtime dependency only, the jar is copied to the applet dir in BKUOnline with dependency-plugin
+   * BKUViewer has compile dependency BKUFonts, transitive in BKUOnline and BKULocal
+   */
+  public static final Dimension VIEWER_DIMENSION = new Dimension(600, 400);
+  
+  public static final List<String> SUPPORTED_MIME_TYPES = new ArrayList<String>();
+  static {
+    SUPPORTED_MIME_TYPES.add("text/plain");
+    SUPPORTED_MIME_TYPES.add("application/xhtml+xml");
+  }
+  protected static final Log log = LogFactory.getLog(SecureViewerDialog.class);
+//  private static SecureViewerDialog dialog;
+  protected ResourceBundle messages;
+  protected JEditorPane viewer;
+  protected JLabel viewerLabel;
+  protected JScrollPane scrollPane;
+  protected HashDataInput content; //remember for save dialog
+  protected FontProvider fontProvider;
+
+  /**
+   * Create and display a modal SecureViewer dialog.
+   * This method blocks until the dialog's close button is pressed.
+   * 
+   * @param owner, dialog is positioned relative to its owner
+   * (if null, at default location of native windowing system)
+   */
+  public SecureViewerDialog(Frame owner, ResourceBundle messages,
+          ActionListener closeListener, String closeCommand,
+          FontProvider fontProvider, ActionListener helpListener) {
+    super(owner, messages.getString(BKUGUIFacade.WINDOWTITLE_VIEWER), true);
+    this.setIconImages(BKUIcons.icons);
+    this.messages = messages;
+    this.fontProvider = fontProvider;
+
+    initContentPane(VIEWER_DIMENSION,
+            createViewerPanel(helpListener),
+            createButtonPanel(closeListener, closeCommand));
+
+    // also leave defaultWindowClosing HIDE_ON_CLOSE
+    this.addWindowListener(new WindowCloseListener(closeListener, closeCommand));
+    this.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
+
+    pack();
+    if (owner != null) {
+      setLocationRelativeTo(owner);
+    } else {
+      setLocationByPlatform(true);
+    }
+  }
+
+  private void initContentPane(Dimension preferredSize,
+          JPanel viewerPanel, JPanel buttonPanel) {
+    Container contentPane = getContentPane();
+    contentPane.setPreferredSize(preferredSize);
+
+    GroupLayout mainLayout = new GroupLayout(contentPane);
+    contentPane.setLayout(mainLayout);
+
+    mainLayout.setHorizontalGroup(
+            mainLayout.createSequentialGroup().addContainerGap().addGroup(
+            mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING).addComponent(viewerPanel, 0, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE).addComponent(buttonPanel, 0, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)).addContainerGap());
+    mainLayout.setVerticalGroup(
+            mainLayout.createSequentialGroup().addContainerGap().addComponent(viewerPanel, 0, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE).addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED).addComponent(buttonPanel, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE).addContainerGap());
+  }
+
+  /**
+   * @param helpListener may be null
+   */
+  private JPanel createViewerPanel(final ActionListener helpListener) {
+    viewer = new JEditorPane();
+    viewer.setEditable(false);
+    viewer.putClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES, Boolean.TRUE);
+    
+    scrollPane = new JScrollPane();
+
+    JPanel viewerPanel = new JPanel();
+    GroupLayout viewerPanelLayout = new GroupLayout(viewerPanel);
+    viewerPanel.setLayout(viewerPanelLayout);
+
+    GroupLayout.SequentialGroup infoHorizontal = viewerPanelLayout.createSequentialGroup();
+    GroupLayout.ParallelGroup infoVertical = viewerPanelLayout.createParallelGroup(GroupLayout.Alignment.LEADING);
+
+    viewerLabel = new JLabel();
+    viewerLabel.setFont(viewerLabel.getFont().deriveFont(viewerLabel.getFont().getStyle() | java.awt.Font.BOLD));
+//    viewerLabel.setLabelFor(viewer);
+
+    infoHorizontal.addComponent(viewerLabel);
+    infoVertical.addComponent(viewerLabel);
+
+    if (helpListener != null) {
+      final JLabel helpLabel = new JLabel();
+      helpLabel.setFocusable(true);
+      helpLabel.setIcon(new ImageIcon(getClass().getResource(BKUGUIFacade.HELP_IMG)));
+      helpLabel.getAccessibleContext().setAccessibleName(messages.getString(BKUGUIFacade.ALT_HELP));
+      helpLabel.addMouseListener(new MouseAdapter() {
+
+        @Override
+        public void mouseClicked(MouseEvent arg0) {
+          ActionEvent e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, BKUGUIFacade.HELP_HASHDATAVIEWER);
+          helpListener.actionPerformed(e);
+        }
+      });
+      helpLabel.addKeyListener(new KeyAdapter() {
+
+        @Override
+        public void keyPressed(KeyEvent arg0) {
+
+          if (arg0.getKeyCode() == KeyEvent.VK_ENTER) {
+            ActionEvent e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, BKUGUIFacade.HELP_HASHDATAVIEWER);
+            helpListener.actionPerformed(e);
+          }
+        }
+      });
+
+      helpLabel.addFocusListener(new FocusAdapter() {
+
+        @Override
+        public void focusGained(FocusEvent e) {
+
+          helpLabel.setIcon(new ImageIcon(getClass().getResource(BKUGUIFacade.HELP_IMG_FOCUS)));
+        }
+
+        @Override
+        public void focusLost(FocusEvent e) {
+
+          helpLabel.setIcon(new ImageIcon(getClass().getResource(BKUGUIFacade.HELP_IMG)));
+        }
+      });
+      helpLabel.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
+
+      infoHorizontal.addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED, 0, Short.MAX_VALUE).addComponent(helpLabel);
+      infoVertical.addComponent(helpLabel);
+    }
+
+    viewerPanelLayout.setHorizontalGroup(
+            viewerPanelLayout.createParallelGroup(GroupLayout.Alignment.LEADING).addGroup(infoHorizontal).addComponent(scrollPane));
+    viewerPanelLayout.setVerticalGroup(
+            viewerPanelLayout.createSequentialGroup().addGroup(infoVertical).addPreferredGap(LayoutStyle.ComponentPlacement.RELATED).addComponent(scrollPane));
+
+    return viewerPanel;
+  }
+
+  /**
+   * Sets the hashdataInput to be displayed and makes the dialog visible.
+   * This method blocks until the dialog's close button is pressed.
+   * 
+   * @param mimeType defaults to text/plain if null
+   * @param encoding must be null if document contains charset declaration (e.g. HTML page), otherwise the parser crashes
+
+   * @param hashDataInput
+   */
+  public void setContent(HashDataInput hashDataInput) { //throws FontProviderException {
+
+    log.debug("[" + Thread.currentThread().getName() + "] set viewer content");
+    
+    this.content = null;
+    viewer.setText(null);
+
+    String mimeType = hashDataInput.getMimeType();
+    if (mimeType == null) {
+      mimeType = "text/plain";
+    }
+    log.debug("secure viewer mime type: " + mimeType);
+    // loads editorkit for text/plain if unrecognized
+    viewer.setContentType(mimeType);
+
+    try {
+      
+      if ("text/plain".equals(mimeType)) {
+        viewer.setEditorKit(new StyledEditorKit());
+        viewer.setFont(fontProvider.getFont().deriveFont(Font.PLAIN, viewer.getFont().getSize()));
+      } else if ("application/xhtml+xml".equals(mimeType)) {
+        viewer.setEditorKit(new HTMLEditorKit());
+        //reset font if fontprovider font was set before (TODO also html font from fontprovider)
+        viewer.setFont(new Font("Dialog", Font.PLAIN, viewer.getFont().getSize())); //UIManager.getFont("Label.font"));
+      }
+
+      EditorKit editorKit = viewer.getEditorKit();
+      Document document = editorKit.createDefaultDocument();
+  //    document.putProperty("IgnoreCharsetDirective", new Boolean(true));
+
+      Charset cs = (hashDataInput.getEncoding() == null) ? Charset.forName("UTF-8") : Charset.forName(hashDataInput.getEncoding());
+      log.debug("secure viewer encoding: " + cs.toString());
+
+      InputStreamReader isr = new InputStreamReader(hashDataInput.getHashDataInput(), cs);
+      Reader contentReader = new BufferedReader(isr);
+      viewer.read(contentReader, document);
+      contentReader.close();
+
+      this.content = hashDataInput;
+
+//    } catch (Exception ex) // fontProvider
+//    } catch (IllegalCharsetNameException ex) {
+//    } catch (UnsupportedCharsetException ex) {
+//    } catch (FontProviderException ex) {
+    } catch (Exception ex) {
+      log.error(ex.getMessage(), ex);
+      String p = messages.getString(BKUGUIFacade.ERR_VIEWER);
+      viewer.setContentType("text/plain");
+      viewer.setText(MessageFormat.format(p, ex.getMessage()));
+    }
+    viewer.setCaretPosition(0);
+
+    scrollPane.setViewportView(viewer);
+    scrollPane.setPreferredSize(viewer.getPreferredSize());
+    scrollPane.setAlignmentX(LEFT_ALIGNMENT);
+
+    if ("application/xhtml+xml".equals(mimeType)) {
+      viewerLabel.setText(messages.getString(BKUGUIFacade.WARNING_XHTML));
+    } else {
+      viewerLabel.setText("");
+    }
+
+    log.debug("VIEWER FONT: " + viewer.getFont());
+    setVisible(true);
+    toFront();
+  }
+
+  private JPanel createButtonPanel(ActionListener closeListener, String closeCommand) {
+    JButton closeButton = new JButton();
+    closeButton.setText(messages.getString(BKUGUIFacade.BUTTON_CLOSE));
+    closeButton.setActionCommand(closeCommand);
+    closeButton.addActionListener(new CloseButtonListener(closeListener));
+
+    JButton saveButton = new JButton();
+    saveButton.setText(messages.getString(BKUGUIFacade.BUTTON_SAVE));
+    saveButton.addActionListener(new SaveButtonListener());
+
+    int buttonSize = closeButton.getPreferredSize().width;
+    if (saveButton.getPreferredSize().width > buttonSize) {
+      buttonSize = saveButton.getPreferredSize().width;
+    }
+
+    JPanel buttonPanel = new JPanel();
+    GroupLayout buttonPanelLayout = new GroupLayout(buttonPanel);
+    buttonPanel.setLayout(buttonPanelLayout);
+
+    buttonPanelLayout.setHorizontalGroup(
+            buttonPanelLayout.createSequentialGroup().addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE).addComponent(saveButton, GroupLayout.PREFERRED_SIZE, buttonSize, GroupLayout.PREFERRED_SIZE).addPreferredGap(LayoutStyle.ComponentPlacement.RELATED).addComponent(closeButton, GroupLayout.PREFERRED_SIZE, buttonSize, GroupLayout.PREFERRED_SIZE));
+    buttonPanelLayout.setVerticalGroup(
+            buttonPanelLayout.createParallelGroup(GroupLayout.Alignment.BASELINE).addComponent(saveButton).addComponent(closeButton));
+
+    return buttonPanel;
+  }
+
+  public class WindowCloseListener extends WindowAdapter {
+
+    ActionListener closeListener;
+    String closeCommand;
+
+    public WindowCloseListener(ActionListener closeListener, String closeCommand) {
+      this.closeListener = closeListener;
+      this.closeCommand = closeCommand;
+    }
+
+    @Override
+    public void windowClosing(WindowEvent e) {
+      log.trace("[" + Thread.currentThread().getName() + "] closing secure viewer");
+      setVisible(false);
+      if (closeListener != null) {
+        closeListener.actionPerformed(new ActionEvent(e.getSource(), e.getID(), closeCommand));
+      }
+    }
+  }
+
+  public class CloseButtonListener implements ActionListener {
+
+    ActionListener closeListener;
+
+    public CloseButtonListener(ActionListener closeListener) {
+      this.closeListener = closeListener;
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+      log.trace("[" + Thread.currentThread().getName() + "] closing secure viewer");
+      setVisible(false);
+      if (closeListener != null) {
+        closeListener.actionPerformed(e);
+    }
+    }
+  }
+
+  public class SaveButtonListener implements ActionListener {
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+      log.trace("[" + Thread.currentThread().getName() + "] display secure viewer save dialog");
+      SecureViewerSaveDialog.showSaveDialog(content, messages, null, null);
+    }
+  }
+}