/*

 * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package sun.awt.X11;

import java.awt.FileDialog;

import java.awt.peer.FileDialogPeer;

import java.io.File;

import java.io.FilenameFilter;

import sun.awt.AWTAccessor;

/**

 * FileDialogPeer for the GtkFileChooser.

 *

 * @author Costantino Cerbo (c.cerbo@gmail.com)

 */

final class GtkFileDialogPeer extends XDialogPeer implements FileDialogPeer {

    private final FileDialog fd;

    // A pointer to the native GTK FileChooser widget

    private volatile long widget = 0L;

    private long standaloneWindow;

    private volatile boolean quit;

    GtkFileDialogPeer(FileDialog fd) {

        super(fd);

        this.fd = fd;

    }

    private static native void initIDs();

    static {

        initIDs();

    }

    private native void run(String title, int mode, String dir, String file,

                            FilenameFilter filter, boolean isMultipleMode, int x, int y);

    private native void quit();

    @Override

    public native void toFront();

    @Override

    public native void setBounds(int x, int y, int width, int height, int op);

    /**

     * Called exclusively by the native C code.

     */

    private void setFileInternal(String directory, String[] filenames) {

        AWTAccessor.FileDialogAccessor accessor = AWTAccessor

                .getFileDialogAccessor();

        if (filenames == null) {

            accessor.setDirectory(fd, null);

            accessor.setFile(fd, null);

            accessor.setFiles(fd, null);

        } else {

            // Fix 6987233: add the trailing slash if it's absent

            String with_separator = directory;

            if (directory != null) {

                with_separator = directory.endsWith(File.separator) ?

                        directory : (directory + File.separator);

            }

            accessor.setDirectory(fd, with_separator);

            accessor.setFile(fd, filenames[0]);

            int filesNumber = (filenames != null) ? filenames.length : 0;

            File[] files = new File[filesNumber];

            for (int i = 0; i < filesNumber; i++) {

                files[i] = new File(directory, filenames[i]);

            }

            accessor.setFiles(fd, files);

        }

    }

    /**

     * Called exclusively by the native C code.

     */

    private boolean filenameFilterCallback(String fullname) {

        if (fd.getFilenameFilter() == null) {

            // no filter, accept all.

            return true;

        }

        File filen = new File(fullname);

        return fd.getFilenameFilter().accept(new File(filen.getParent()),

                filen.getName());

    }

    @Override

    public void setVisible(boolean b) {

        XToolkit.awtLock();

        try {

            quit = !b;

            if (b) {

                Runnable task = () -> {

                    showNativeDialog();

                    standaloneWindow = 0;

                    fd.setVisible(false);

                };

                new Thread(null, task, "ShowDialog", 0, false).start();

            } else {

                quit();

                fd.setVisible(false);

            }

        } finally {

            XToolkit.awtUnlock();

        }

    }

    @Override

    public void dispose() {

        XToolkit.awtLock();

        try {

            quit = true;

            quit();

        }

        finally {

            XToolkit.awtUnlock();

        }

        super.dispose();

    }

    @Override

    public void setDirectory(String dir) {

        // We do not implement this method because we

        // have delegated to FileDialog#setDirectory

    }

    @Override

    public void setFile(String file) {

        // We do not implement this method because we

        // have delegated to FileDialog#setFile

    }

    protected void requestXFocus(long time, boolean timeProvided) {

        if(standaloneWindow == 0) {

            super.requestXFocus(time, timeProvided);

            return;

        }

        XNETProtocol net_protocol = XWM.getWM().getNETProtocol();

        if (net_protocol != null) {

            net_protocol.setActiveWindow(standaloneWindow);

        }

    }

    @Override

    public void setFilenameFilter(FilenameFilter filter) {

        // We do not implement this method because we

        // have delegated to FileDialog#setFilenameFilter

    }

    private void showNativeDialog() {

        String dirname = fd.getDirectory();

        // File path has a priority against directory path.

        String filename = fd.getFile();

        if (filename != null) {

            final File file = new File(filename);

            if (fd.getMode() == FileDialog.LOAD

                && dirname != null

                && file.getParent() == null) {

                // File path for gtk_file_chooser_set_filename.

                filename = dirname + (dirname.endsWith(File.separator) ? "" :

                                              File.separator) + filename;

            }

            if (fd.getMode() == FileDialog.SAVE && file.getParent() != null) {

                // Filename for gtk_file_chooser_set_current_name.

                filename = file.getName();

                // Directory path for gtk_file_chooser_set_current_folder.

                dirname = file.getParent();

            }

        }

        if (!quit) {

            run(fd.getTitle(), fd.getMode(), dirname, filename,

                    fd.getFilenameFilter(), fd.isMultipleMode(), fd.getX(), fd.getY());

        }

    }

    /**

     * Called by native code when GTK dialog is created.

     */

    boolean setWindow(long xid) {

        if (!quit && widget != 0) {

            standaloneWindow = xid;

            requestXFocus();

            return true;

        }

        return false;

    }

}