Package com.mucommander.ui.action.impl

Source Code of com.mucommander.ui.action.impl.OpenAction

/*
* This file is part of muCommander, http://www.mucommander.com
* Copyright (C) 2002-2012 Maxence Bernard
*
* muCommander 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.
*
* muCommander 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 this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package com.mucommander.ui.action.impl;

import java.awt.event.KeyEvent;
import java.io.IOException;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.swing.KeyStroke;

import com.mucommander.commons.file.AbstractFile;
import com.mucommander.commons.file.FileProtocols;
import com.mucommander.commons.file.impl.local.LocalFile;
import com.mucommander.conf.MuConfigurations;
import com.mucommander.conf.MuPreference;
import com.mucommander.conf.MuPreferences;
import com.mucommander.desktop.DesktopManager;
import com.mucommander.job.TempExecJob;
import com.mucommander.text.Translator;
import com.mucommander.ui.action.AbstractActionDescriptor;
import com.mucommander.ui.action.ActionCategories;
import com.mucommander.ui.action.ActionCategory;
import com.mucommander.ui.action.ActionDescriptor;
import com.mucommander.ui.action.ActionFactory;
import com.mucommander.ui.action.MuAction;
import com.mucommander.ui.dialog.InformationDialog;
import com.mucommander.ui.dialog.file.ProgressDialog;
import com.mucommander.ui.main.FolderPanel;
import com.mucommander.ui.main.MainFrame;
import com.mucommander.ui.main.quicklist.RecentExecutedFilesQL;
import com.mucommander.ui.main.tabs.FileTableTabs;

/**
* This action 'opens' the currently selected file or folder in the active FileTable.
* This means different things depending on the kind of file that is currently selected:
* <ul>
* <li>For browsable files (directory, archive...): shows file contents
* <li>For local file that are not an archive or archive entry: executes file with native file associations
* <li>For any other file type, remote or local: copies file to a temporary local file and executes it with native file associations
* </ul>
*
* @author Maxence Bernard, Nicolas Rinaudo
*/
public class OpenAction extends MuAction {
    /**
     * Creates a new <code>OpenAction</code> with the specified parameters.
     * @param mainFrame  frame to which the action is attached.
     * @param properties action's properties.
     */
    public OpenAction(MainFrame mainFrame, Map<String,Object> properties) {
        super(mainFrame, properties);
    }

    /**
     * Opens the specified file in the specified folder panel.
     * <p>
     * <code>file</code> will be opened using the following rules:
     * <ul>
     *   <li>
     *     If <code>file</code> is {@link com.mucommander.commons.file.AbstractFile#isBrowsable() browsable},
     *     it will be opened in <code>destination</code>.
     *   </li>
     *   <li>
     *     If <code>file</code> is local, it will be opened using its native associations.
     *   </li>
     *   <li>
     *     If <code>file</code> is remote, it will first be copied in a temporary local file and
     *     then opened using its native association.
     *   </li>
     * </ul>
     * </p>
     * @param file        file to open.
     * @param destination if <code>file</code> is browsable, folder panel in which to open the file.
     */
    protected void open(final AbstractFile file, FolderPanel destination) {
      AbstractFile resolvedFile;
      if (file.isSymlink()) {
        resolvedFile = resolveSymlink(file);

        if (resolvedFile == null) {
          InformationDialog.showErrorDialog(mainFrame, Translator.get("cannot_open_cyclic_symlink"));
          return;
        }
      }
      else
        resolvedFile = file;

        // Opens browsable files in the destination FolderPanel.
        if(resolvedFile.isBrowsable()) {
          resolvedFile = MuConfigurations.getPreferences().getVariable(MuPreference.CD_FOLLOWS_SYMLINKS, MuPreferences.DEFAULT_CD_FOLLOWS_SYMLINKS) ? resolvedFile : file;

          FileTableTabs tabs = destination.getTabs();
          if (tabs.getCurrentTab().isLocked())
            tabs.add(resolvedFile);
          else
            destination.tryChangeCurrentFolder(resolvedFile);
        }

        // Opens local files using their native associations.
        else if(resolvedFile.getURL().getScheme().equals(FileProtocols.FILE) && (resolvedFile.hasAncestor(LocalFile.class))) {
            try {
              DesktopManager.open(resolvedFile);
              RecentExecutedFilesQL.addFile(resolvedFile);
        }
            catch(IOException e) {
                InformationDialog.showErrorDialog(mainFrame);
            }
        }

        // Copies non-local file in a temporary local file and opens them using their native association.
        else {
            ProgressDialog progressDialog = new ProgressDialog(mainFrame, Translator.get("copy_dialog.copying"));
            TempExecJob job = new TempExecJob(progressDialog, mainFrame, resolvedFile);
            progressDialog.start(job);
        }
    }

    private AbstractFile resolveSymlink(AbstractFile symlink) {
      return resolveSymlink(symlink, new HashSet<AbstractFile>());
    }

    private AbstractFile resolveSymlink(AbstractFile file, Set<AbstractFile> visitedFiles) {
      if (visitedFiles.contains(file))
        return null;
      else {
        visitedFiles.add(file);
        return file.isSymlink() ? resolveSymlink(file.getCanonicalFile(), visitedFiles) : file;
      }
    }

    /**
     * Opens the currently selected file in the active folder panel.
     */
    @Override
    public void performAction() {
        AbstractFile file;

        // Retrieves the currently selected file, aborts if none.
        // Note: a CachedFile instance is retrieved to avoid blocking the event thread.
        if((file = mainFrame.getActiveTable().getSelectedFile(true, true)) == null)
            return;

        // Opens the currently selected file.
        open(file, mainFrame.getActivePanel());

    }

  @Override
  public ActionDescriptor getDescriptor() {
    return new Descriptor();
  }

    public static class Factory implements ActionFactory {

    public MuAction createAction(MainFrame mainFrame, Map<String,Object> properties) {
      return new OpenAction(mainFrame, properties);
    }
    }
   
    public static class Descriptor extends AbstractActionDescriptor {
      public static final String ACTION_ID = "Open";
     
    public String getId() { return ACTION_ID; }

    public ActionCategory getCategory() { return ActionCategories.NAVIGATION; }

    public KeyStroke getDefaultAltKeyStroke() { return KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0); }

    public KeyStroke getDefaultKeyStroke() { return KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0); }
    }
}
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