JAL-1988 JAL-3772 Non-blocking modal dialogs for unsaved changes and saving files...
[jalview.git] / src / jalview / io / JalviewFileChooser.java
index b128997..dba7ad1 100755 (executable)
 /*
- * Jalview - A Sequence Alignment Editor and Viewer (Version 2.7)
- * Copyright (C) 2011 J Procter, AM Waterhouse, J Engelhardt, LM Lui, G Barton, M Clamp, S Searle
- * 
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ *
  * This file is part of Jalview.
- * 
+ *
  * Jalview 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 3 of the License, or (at your option) any later version.
- * 
- * Jalview 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 
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * Jalview 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 Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
  */
 //////////////////////////////////////////////////////////////////
 package jalview.io;
 
-import java.io.*;
-import java.util.*;
-
-import java.awt.*;
-import java.awt.event.*;
-import javax.swing.*;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.EventQueue;
+import java.awt.HeadlessException;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import java.io.File;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.StringTokenizer;
+import java.util.Vector;
+import java.util.concurrent.Callable;
+
+import javax.swing.BoxLayout;
+import javax.swing.DefaultListCellRenderer;
+import javax.swing.JCheckBox;
+import javax.swing.JFileChooser;
+import javax.swing.JList;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.SpringLayout;
+import javax.swing.filechooser.FileFilter;
+import javax.swing.plaf.basic.BasicFileChooserUI;
+
+import jalview.bin.Cache;
+import jalview.gui.JvOptionPane;
+import jalview.util.MessageManager;
+import jalview.util.Platform;
+import jalview.util.dialogrunner.DialogRunnerI;
 
 /**
  * Enhanced file chooser dialog box.
- * 
+ *
  * NOTE: bug on Windows systems when filechooser opened on directory to view
  * files with colons in title.
- * 
+ *
  * @author AMW
- * 
+ *
  */
 public class JalviewFileChooser extends JFileChooser
+        implements DialogRunnerI, PropertyChangeListener
 {
+  private static final long serialVersionUID = 1L;
+
+  private Map<Object, Callable> callbacks = new HashMap<>();
+
+  File selectedFile = null;
+
+  /**
+   * backupfilesCheckBox = "Include backup files" checkbox includeBackupfiles =
+   * flag set by checkbox
+   */
+  private JCheckBox backupfilesCheckBox = null;
+
+  protected boolean includeBackupFiles = false;
+
+  /**
+   * Factory method to return a file chooser that offers readable alignment file
+   * formats
+   * 
+   * @param directory
+   * @param selected
+   * @return
+   */
+  public static JalviewFileChooser forRead(String directory,
+          String selected)
+  {
+    return JalviewFileChooser.forRead(directory, selected, false);
+  }
+
+  public static JalviewFileChooser forRead(String directory,
+          String selected, boolean allowBackupFiles)
+  {
+    List<String> extensions = new ArrayList<>();
+    List<String> descs = new ArrayList<>();
+    for (FileFormatI format : FileFormats.getInstance().getFormats())
+    {
+      if (format.isReadable())
+      {
+        extensions.add(format.getExtensions());
+        descs.add(format.getName());
+      }
+    }
+
+    return new JalviewFileChooser(directory,
+            extensions.toArray(new String[extensions.size()]),
+            descs.toArray(new String[descs.size()]), selected, true,
+            allowBackupFiles);
+  }
+
+  /**
+   * Factory method to return a file chooser that offers writable alignment file
+   * formats
+   * 
+   * @param directory
+   * @param selected
+   * @return
+   */
+  public static JalviewFileChooser forWrite(String directory,
+          String selected)
+  {
+    // TODO in Java 8, forRead and forWrite can be a single method
+    // with a lambda expression parameter for isReadable/isWritable
+    List<String> extensions = new ArrayList<>();
+    List<String> descs = new ArrayList<>();
+    for (FileFormatI format : FileFormats.getInstance().getFormats())
+    {
+      if (format.isWritable())
+      {
+        extensions.add(format.getExtensions());
+        descs.add(format.getName());
+      }
+    }
+    return new JalviewFileChooser(directory,
+            extensions.toArray(new String[extensions.size()]),
+            descs.toArray(new String[descs.size()]), selected, false);
+  }
+
   public JalviewFileChooser(String dir)
   {
     super(safePath(dir));
     setAccessory(new RecentlyOpened());
   }
 
+  public JalviewFileChooser(String dir, String[] suffix, String[] desc,
+          String selected)
+  {
+    this(dir, suffix, desc, selected, true);
+  }
+
+  /**
+   * Constructor for a single choice of file extension and description
+   * 
+   * @param extension
+   * @param desc
+   */
+  public JalviewFileChooser(String extension, String desc)
+  {
+    this(Cache.getProperty("LAST_DIRECTORY"), new String[] { extension },
+            new String[]
+            { desc }, desc, true);
+  }
+
+  JalviewFileChooser(String dir, String[] extensions, String[] descs,
+          String selected, boolean acceptAny)
+  {
+    this(dir, extensions, descs, selected, acceptAny, false);
+  }
+
+  public JalviewFileChooser(String dir, String[] extensions, String[] descs,
+          String selected, boolean acceptAny, boolean allowBackupFiles)
+  {
+    super(safePath(dir));
+    if (extensions.length == descs.length)
+    {
+      List<String[]> formats = new ArrayList<>();
+      for (int i = 0; i < extensions.length; i++)
+      {
+        formats.add(new String[] { extensions[i], descs[i] });
+      }
+      init(formats, selected, acceptAny, allowBackupFiles);
+    }
+    else
+    {
+      System.err.println("JalviewFileChooser arguments mismatch: "
+              + extensions + ", " + descs);
+    }
+  }
+
   private static File safePath(String dir)
   {
     if (dir == null)
@@ -57,35 +212,64 @@ public class JalviewFileChooser extends JFileChooser
     return f;
   }
 
-  public JalviewFileChooser(String dir, String[] suffix, String[] desc,
-          String selected, boolean selectAll)
+  /**
+   * Overridden for JalviewJS compatibility: only one thread in Javascript, so
+   * we can't wait for user choice in another thread and then perform the
+   * desired action
+   */
+  @Override
+  public int showOpenDialog(Component parent)
   {
-    super(safePath(dir));
-    init(suffix, desc, selected, selectAll);
+    int value = super.showOpenDialog(this);
+
+    if (!Platform.isJS())
+    /**
+     * Java only
+     * 
+     * @j2sIgnore
+     */
+    {
+      /*
+       * code here is not run in JalviewJS, instead
+       * propertyChange() is called for dialog action
+       */
+      handleResponse(value);
+    }
+    return value;
   }
 
-  public JalviewFileChooser(String dir, String[] suffix, String[] desc,
-          String selected)
+  /**
+   * 
+   * @param formats
+   *          a list of {extensions, description} for each file format
+   * @param selected
+   * @param acceptAny
+   *          if true, 'any format' option is included
+   */
+  void init(List<String[]> formats, String selected, boolean acceptAny)
   {
-    super(safePath(dir));
-    init(suffix, desc, selected, true);
+    init(formats, selected, acceptAny, false);
   }
 
-  void init(String[] suffix, String[] desc, String selected,
-          boolean selectAll)
+  void init(List<String[]> formats, String selected, boolean acceptAny,
+          boolean allowBackupFiles)
   {
 
     JalviewFileFilter chosen = null;
 
     // SelectAllFilter needs to be set first before adding further
     // file filters to fix bug on Mac OSX
-    setAcceptAllFileFilterUsed(selectAll);
-    
-    for (int i = 0; i < suffix.length; i++)
+    setAcceptAllFileFilterUsed(acceptAny);
+
+    for (String[] format : formats)
     {
-      JalviewFileFilter jvf = new JalviewFileFilter(suffix[i], desc[i]);
+      JalviewFileFilter jvf = new JalviewFileFilter(format[0], format[1]);
+      if (allowBackupFiles)
+      {
+        jvf.setParentJFC(this);
+      }
       addChoosableFileFilter(jvf);
-      if ((selected != null) && selected.equalsIgnoreCase(desc[i]))
+      if ((selected != null) && selected.equalsIgnoreCase(format[1]))
       {
         chosen = jvf;
       }
@@ -96,19 +280,78 @@ public class JalviewFileChooser extends JFileChooser
       setFileFilter(chosen);
     }
 
-    setAccessory(new RecentlyOpened());
+    if (allowBackupFiles)
+    {
+      JPanel multi = new JPanel();
+      multi.setLayout(new BoxLayout(multi, BoxLayout.PAGE_AXIS));
+      if (backupfilesCheckBox == null)
+      {
+        try
+        {
+          includeBackupFiles = Boolean.parseBoolean(
+                  Cache.getProperty(BackupFiles.NS + "_FC_INCLUDE"));
+        } catch (Exception e)
+        {
+          includeBackupFiles = false;
+        }
+        backupfilesCheckBox = new JCheckBox(
+                MessageManager.getString("label.include_backup_files"),
+                includeBackupFiles);
+        backupfilesCheckBox.setAlignmentX(Component.CENTER_ALIGNMENT);
+        JalviewFileChooser jfc = this;
+        backupfilesCheckBox.addActionListener(new ActionListener()
+        {
+          @Override
+          public void actionPerformed(ActionEvent e)
+          {
+            includeBackupFiles = backupfilesCheckBox.isSelected();
+            Cache.setProperty(BackupFiles.NS + "_FC_INCLUDE",
+                    String.valueOf(includeBackupFiles));
+
+            FileFilter f = jfc.getFileFilter();
+            // deselect the selected file if it's no longer choosable
+            File selectedFile = jfc.getSelectedFile();
+            if (selectedFile != null && !f.accept(selectedFile))
+            {
+              jfc.setSelectedFile(null);
+            }
+            // fake the OK button changing (to force it to upate)
+            String s = jfc.getApproveButtonText();
+            jfc.firePropertyChange(APPROVE_BUTTON_TEXT_CHANGED_PROPERTY,
+                    null, s);
+            // fake the file filter changing (its behaviour actually has)
+            jfc.firePropertyChange(FILE_FILTER_CHANGED_PROPERTY, null, f);
+
+            jfc.rescanCurrentDirectory();
+            jfc.revalidate();
+            jfc.repaint();
+          }
+        });
+      }
+      multi.add(new RecentlyOpened());
+      multi.add(backupfilesCheckBox);
+      setAccessory(multi);
+    }
+    else
+    {
+      // set includeBackupFiles=false to avoid other file choosers from picking
+      // up backup files (Just In Case)
+      includeBackupFiles = false;
+      setAccessory(new RecentlyOpened());
+    }
   }
 
+  @Override
   public void setFileFilter(javax.swing.filechooser.FileFilter filter)
   {
     super.setFileFilter(filter);
 
     try
     {
-      if (getUI() instanceof javax.swing.plaf.basic.BasicFileChooserUI)
+      if (getUI() instanceof BasicFileChooserUI)
       {
-        final javax.swing.plaf.basic.BasicFileChooserUI ui = (javax.swing.plaf.basic.BasicFileChooserUI) getUI();
-        final String name = ui.getFileName().trim();
+        final BasicFileChooserUI fcui = (BasicFileChooserUI) getUI();
+        final String name = fcui.getFileName().trim();
 
         if ((name == null) || (name.length() == 0))
         {
@@ -117,12 +360,13 @@ public class JalviewFileChooser extends JFileChooser
 
         EventQueue.invokeLater(new Thread()
         {
+          @Override
           public void run()
           {
-            String currentName = ui.getFileName();
+            String currentName = fcui.getFileName();
             if ((currentName == null) || (currentName.length() == 0))
             {
-              ui.setFileName(name);
+              fcui.setFileName(name);
             }
           }
         });
@@ -134,111 +378,167 @@ public class JalviewFileChooser extends JFileChooser
     }
   }
 
-  public String getSelectedFormat()
+  /**
+   * Returns the selected file format, or null if none selected
+   * 
+   * @return
+   */
+  public FileFormatI getSelectedFormat()
   {
     if (getFileFilter() == null)
     {
       return null;
     }
 
+    /*
+     * logic here depends on option description being formatted as 
+     * formatName (extension, extension...)
+     * or the 'no option selected' value
+     * All Files
+     * @see JalviewFileFilter.getDescription
+     */
     String format = getFileFilter().getDescription();
-
-    if (format.toUpperCase().startsWith("JALVIEW"))
+    int parenPos = format.indexOf("(");
+    if (parenPos > 0)
     {
-      format = "Jalview";
-    }
-    else if (format.toUpperCase().startsWith("FASTA"))
-    {
-      format = "FASTA";
-    }
-    else if (format.toUpperCase().startsWith("MSF"))
-    {
-      format = "MSF";
-    }
-    else if (format.toUpperCase().startsWith("CLUSTAL"))
-    {
-      format = "CLUSTAL";
-    }
-    else if (format.toUpperCase().startsWith("BLC"))
-    {
-      format = "BLC";
-    }
-    else if (format.toUpperCase().startsWith("PIR"))
-    {
-      format = "PIR";
-    }
-    else if (format.toUpperCase().startsWith("PFAM"))
-    {
-      format = "PFAM";
+      format = format.substring(0, parenPos).trim();
+      try
+      {
+        return FileFormats.getInstance().forName(format);
+      } catch (IllegalArgumentException e)
+      {
+        System.err.println("Unexpected format: " + format);
+      }
     }
+    return null;
+  }
 
-    return format;
+  @Override
+  public File getSelectedFile()
+  {
+    File f = super.getSelectedFile();
+    return f == null ? selectedFile : f;
   }
 
+  @Override
   public int showSaveDialog(Component parent) throws HeadlessException
   {
     this.setAccessory(null);
+    // Java 9,10,11 on OSX - clear selected file so name isn't auto populated
+    this.setSelectedFile(null);
 
-    setDialogType(SAVE_DIALOG);
+    return super.showSaveDialog(parent);
+  }
 
-    int ret = showDialog(parent, "Save");
+  /**
+   * If doing a Save, and an existing file is chosen or entered, prompt for
+   * confirmation of overwrite. Proceed if Yes, else leave the file chooser
+   * open.
+   * 
+   * @see https://stackoverflow.com/questions/8581215/jfilechooser-and-checking-for-overwrite
+   */
+  @Override
+  public void approveSelection()
+  {
+    if (getDialogType() != SAVE_DIALOG)
+    {
+      super.approveSelection();
+      return;
+    }
+
+    selectedFile = getSelectedFile();
+
+    if (selectedFile == null)
+    {
+      // Workaround for Java 9,10 on OSX - no selected file, but there is a
+      // filename typed in
+      try
+      {
+        String filename = ((BasicFileChooserUI) getUI()).getFileName();
+        if (filename != null && filename.length() > 0)
+        {
+          selectedFile = new File(getCurrentDirectory(), filename);
+        }
+      } catch (Throwable x)
+      {
+        System.err.println(
+                "Unexpected exception when trying to get filename.");
+        x.printStackTrace();
+      }
+      // TODO: ENSURE THAT FILES SAVED WITH A ':' IN THE NAME ARE REFUSED AND
+      // THE
+      // USER PROMPTED FOR A NEW FILENAME
+    }
+
+    if (selectedFile == null)
+    {
+      return;
+    }
 
     if (getFileFilter() instanceof JalviewFileFilter)
     {
       JalviewFileFilter jvf = (JalviewFileFilter) getFileFilter();
 
-      if (!jvf.accept(getSelectedFile()))
+      if (!jvf.accept(selectedFile))
       {
-        String withExtension = getSelectedFile() + "."
+        String withExtension = getSelectedFile().getName() + "."
                 + jvf.getAcceptableExtension();
-        setSelectedFile(new File(withExtension));
+        selectedFile = (new File(getCurrentDirectory(), withExtension));
+        setSelectedFile(selectedFile);
       }
     }
-    // TODO: ENSURE THAT FILES SAVED WITH A ':' IN THE NAME ARE REFUSED AND THE
-    // USER PROMPTED FOR A NEW FILENAME
-    if ((ret == JalviewFileChooser.APPROVE_OPTION)
-            && getSelectedFile().exists())
-    {
-      int confirm = JOptionPane.showConfirmDialog(parent,
-              "Overwrite existing file?", "File exists",
-              JOptionPane.YES_NO_OPTION);
 
-      if (confirm != JOptionPane.YES_OPTION)
+    if (selectedFile.exists())
+    {
+      int confirm = Cache.getDefault("CONFIRM_OVERWRITE_FILE", true)
+              ? JvOptionPane.showConfirmDialog(this,
+                      MessageManager
+                              .getString("label.overwrite_existing_file"),
+                      MessageManager.getString("label.file_already_exists"),
+                      JvOptionPane.YES_NO_OPTION)
+              : JOptionPane.YES_OPTION;
+
+      if (confirm != JvOptionPane.YES_OPTION)
       {
-        ret = JalviewFileChooser.CANCEL_OPTION;
+        return;
       }
     }
 
-    return ret;
+    super.approveSelection();
   }
 
-  void recentListSelectionChanged(String selection)
+  void recentListSelectionChanged(Object selection)
   {
     setSelectedFile(null);
-
-    File file = new File(selection);
-    if (getFileFilter() instanceof JalviewFileFilter)
+    if (selection != null)
     {
-      JalviewFileFilter jvf = (JalviewFileFilter) this.getFileFilter();
-
-      if (!jvf.accept(file))
+      File file = new File((String) selection);
+      if (getFileFilter() instanceof JalviewFileFilter)
       {
-        setFileFilter(getChoosableFileFilters()[0]);
+        JalviewFileFilter jvf = (JalviewFileFilter) this.getFileFilter();
+
+        if (!jvf.accept(file))
+        {
+          setFileFilter(getChoosableFileFilters()[0]);
+        }
       }
-    }
 
-    setSelectedFile(file);
+      setSelectedFile(file);
+    }
   }
 
   class RecentlyOpened extends JPanel
   {
-    JList list;
+    private static final long serialVersionUID = 1L;
 
-    public RecentlyOpened()
+    JList<String> list;
+
+    RecentlyOpened()
     {
-      String historyItems = jalview.bin.Cache.getProperty("RECENT_FILE");
+      setPreferredSize(new Dimension(300, 100));
+      String historyItems = Cache.getProperty("RECENT_FILE");
       StringTokenizer st;
-      Vector recent = new Vector();
+      Vector<String> recent = new Vector<>();
 
       if (historyItems != null)
       {
@@ -246,11 +546,11 @@ public class JalviewFileChooser extends JFileChooser
 
         while (st.hasMoreTokens())
         {
-          recent.addElement(st.nextElement());
+          recent.addElement(st.nextToken());
         }
       }
 
-      list = new JList(recent);
+      list = new JList<>(recent);
 
       DefaultListCellRenderer dlcr = new DefaultListCellRenderer();
       dlcr.setHorizontalAlignment(DefaultListCellRenderer.RIGHT);
@@ -258,28 +558,116 @@ public class JalviewFileChooser extends JFileChooser
 
       list.addMouseListener(new MouseAdapter()
       {
+        @Override
         public void mousePressed(MouseEvent evt)
         {
-          recentListSelectionChanged(list.getSelectedValue().toString());
+          recentListSelectionChanged(list.getSelectedValue());
         }
       });
 
-      this.setBorder(new javax.swing.border.TitledBorder("Recently Opened"));
+      this.setBorder(new javax.swing.border.TitledBorder(
+              MessageManager.getString("label.recently_opened")));
 
       final JScrollPane scroller = new JScrollPane(list);
-      scroller.setPreferredSize(new Dimension(130, 200));
+
+      SpringLayout layout = new SpringLayout();
+      layout.putConstraint(SpringLayout.WEST, scroller, 5,
+              SpringLayout.WEST, this);
+      layout.putConstraint(SpringLayout.NORTH, scroller, 5,
+              SpringLayout.NORTH, this);
+
+      if (Platform.isAMacAndNotJS())
+      {
+        scroller.setPreferredSize(new Dimension(500, 100));
+      }
+      else
+      {
+        scroller.setPreferredSize(new Dimension(530, 200));
+      }
+
       this.add(scroller);
 
       javax.swing.SwingUtilities.invokeLater(new Runnable()
       {
+        @Override
         public void run()
         {
-          scroller.getHorizontalScrollBar().setValue(
-                  scroller.getHorizontalScrollBar().getMaximum());
+          scroller.getHorizontalScrollBar()
+                  .setValue(scroller.getHorizontalScrollBar().getMaximum());
         }
       });
 
     }
 
   }
+
+  /*
+  @Override
+  public JalviewFileChooser setResponseHandler(Object response,
+          Runnable action)
+  {
+    callbacks.put(response, new Callable<Void>()
+    {
+      @Override
+      public Void call()
+      {
+        action.run();
+        return null;
+      }
+    });
+    return this;
+  }
+  */
+
+  @Override
+  public DialogRunnerI setResponseHandler(Object response, Callable action)
+  {
+    callbacks.put(response, action);
+    return this;
+  }
+
+  @Override
+  public void handleResponse(Object response)
+  {
+    /*
+    * this test is for NaN in Chrome
+    */
+    if (response != null && !response.equals(response))
+    {
+      return;
+    }
+    Callable action = callbacks.get(response);
+    if (action != null)
+    {
+      try
+      {
+        action.call();
+      } catch (Exception e)
+      {
+        e.printStackTrace();
+      }
+    }
+  }
+
+  /**
+   * JalviewJS signals file selection by a property change event for property
+   * "SelectedFile". This methods responds to that by running the response
+   * action for 'OK' in the dialog.
+   * 
+   * @param evt
+   */
+  @Override
+  public void propertyChange(PropertyChangeEvent evt)
+  {
+    // TODO other properties need runners...
+    switch (evt.getPropertyName())
+    {
+    /*
+     * property name here matches that used in JFileChooser.js
+     */
+    case "SelectedFile":
+      handleResponse(APPROVE_OPTION);
+      break;
+    }
+  }
 }