/*
 * Copyright (c) 2011, 2020, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.lwawt.macosx;

import java.awt.AWTEvent;
import java.awt.AWTException;
import java.awt.BufferCapabilities;
import java.awt.BufferCapabilities.FlipContents;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.FileDialog;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.GraphicsConfiguration;
import java.awt.Image;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Window;
import java.awt.event.FocusEvent.Cause;
import java.awt.event.PaintEvent;
import java.awt.image.ColorModel;
import java.awt.image.VolatileImage;
import java.awt.peer.ComponentPeer;
import java.awt.peer.ContainerPeer;
import java.awt.peer.FileDialogPeer;
import java.io.File;
import java.io.FilenameFilter;
import java.security.AccessController;
import java.util.List;

import sun.awt.AWTAccessor;
import sun.java2d.pipe.Region;
import sun.security.action.GetBooleanAction;

class CFileDialog implements FileDialogPeer {

    private class Task implements Runnable {

        @Override
        public void run() {
            try {
                boolean navigateApps = !AccessController.doPrivileged(
                        new GetBooleanAction("apple.awt.use-file-dialog-packages"));
                boolean chooseDirectories = AccessController.doPrivileged(
                        new GetBooleanAction("apple.awt.fileDialogForDirectories"));

                int dialogMode = target.getMode();
                String title = target.getTitle();
                if (title == null) {
                    title = " ";
                }

                String[] userFileNames = nativeRunFileDialog(title,
                        dialogMode,
                        target.isMultipleMode(),
                        navigateApps,
                        chooseDirectories,
                        target.getFilenameFilter() != null,
                        target.getDirectory(),
                        target.getFile());

                String directory = null;
                String file = null;
                File[] files = null;

                if (userFileNames != null) {
                    // the dialog wasn't cancelled
                    int filesNumber = userFileNames.length;
                    files = new File[filesNumber];
                    for (int i = 0; i < filesNumber; i++) {
                        files[i] = new File(userFileNames[i]);
                    }

                    directory = files[0].getParent();
                    // make sure directory always ends in '/'
                    if (!directory.endsWith(File.separator)) {
                        directory = directory + File.separator;
                    }

                    file = files[0].getName(); // pick any file
                }

                // store results back in component
                AWTAccessor.FileDialogAccessor accessor = AWTAccessor.getFileDialogAccessor();
                accessor.setDirectory(target, directory);
                accessor.setFile(target, file);
                accessor.setFiles(target, files);
            } finally {
                // Java2 Dialog waits for hide to let show() return
                target.dispose();
            }
        }
    }

    // The target FileDialog
    private final FileDialog target;

    CFileDialog(FileDialog target) {
        this.target = target;
    }

    @Override
    public void dispose() {
        LWCToolkit.targetDisposedPeer(target, this);
        // Unlike other peers, we do not have a native model pointer to
        // dispose of because the save and open panels are never released by
        // an application.
    }

    @Override
    public void setVisible(boolean visible) {
        if (visible) {
            // Java2 Dialog class requires peer to run code in a separate thread
            // and handles keeping the call modal
            new Thread(null, new Task(), "FileDialog", 0, false).start();
        }
        // We hide ourself before "show" returns - setVisible(false)
        // doesn't apply
    }

    
A callback method.
If the file dialog has a file filter, ask it if inFilename is acceptable.
If the dialog doesn't have a file filter return true.
/**
     * A callback method.
     * If the file dialog has a file filter, ask it if inFilename is acceptable.
     * If the dialog doesn't have a file filter return true.
     */
    private boolean queryFilenameFilter(final String inFilename) {
        boolean ret = false;

        final FilenameFilter ff = target.getFilenameFilter();
        File fileObj = new File(inFilename);

        // Directories are never filtered by the FileDialog.
        if (!fileObj.isDirectory()) {
            File directoryObj = new File(fileObj.getParent());
            String nameOnly = fileObj.getName();
            ret = ff.accept(directoryObj, nameOnly);
        }
        return ret;
    }

    private native String[] nativeRunFileDialog(String title, int mode,
            boolean multipleMode, boolean shouldNavigateApps,
            boolean canChooseDirectories, boolean hasFilenameFilter,
            String directory, String file);

    @Override
    public void setDirectory(String dir) {
    }

    @Override
    public void setFile(String file) {
    }

    @Override
    public void setFilenameFilter(FilenameFilter filter) {
    }

    @Override
    public void blockWindows(List<Window> windows) {
    }

    @Override
    public void setResizable(boolean resizeable) {
    }

    @Override
    public void setTitle(String title) {
    }

    @Override
    public void repositionSecurityWarning() {
    }

    @Override
    public void updateAlwaysOnTopState() {
    }

    @Override
    public void setModalBlocked(Dialog blocker, boolean blocked) {
    }

    @Override
    public void setOpacity(float opacity) {
    }

    @Override
    public void setOpaque(boolean isOpaque) {
    }

    @Override
    public void toBack() {
    }

    @Override
    public void toFront() {
    }

    @Override
    public void updateFocusableWindowState() {
    }

    @Override
    public void updateIconImages() {
    }

    @Override
    public void updateMinimumSize() {
    }

    @Override
    public void updateWindow() {
    }

    @Override
    public void beginLayout() {
    }

    @Override
    public void beginValidate() {
    }

    @Override
    public void endLayout() {
    }

    @Override
    public void endValidate() {
    }

    @Override
    public Insets getInsets() {
        return new Insets(0, 0, 0, 0);
    }

    @Override
    public void applyShape(Region shape) {
    }

    @Override
    public boolean canDetermineObscurity() {
        return false;
    }

    @Override
    public void coalescePaintEvent(PaintEvent e) {
    }

    @Override
    public void createBuffers(int numBuffers, BufferCapabilities caps)
            throws AWTException {
    }

    @Override
    public Image createImage(int width, int height) {
        return null;
    }

    @Override
    public VolatileImage createVolatileImage(int width, int height) {
        return null;
    }

    @Override
    public void destroyBuffers() {
    }

    @Override
    public void flip(int x1, int y1, int x2, int y2, FlipContents flipAction) {
    }

    @Override
    public Image getBackBuffer() {
        return null;
    }

    @Override
    public ColorModel getColorModel() {
        return null;
    }

    @Override
    public FontMetrics getFontMetrics(Font font) {
        return null;
    }

    @Override
    public Graphics getGraphics() {
        return null;
    }

    @Override
    public GraphicsConfiguration getGraphicsConfiguration() {
        return null;
    }

    @Override
    public Point getLocationOnScreen() {
        return null;
    }

    @Override
    public Dimension getMinimumSize() {
        return target.getSize();
    }

    @Override
    public Dimension getPreferredSize() {
        return getMinimumSize();
    }

    @Override
    public void handleEvent(AWTEvent e) {
    }

    @Override
    public boolean handlesWheelScrolling() {
        return false;
    }

    @Override
    public boolean isFocusable() {
        return false;
    }

    @Override
    public boolean isObscured() {
        return false;
    }

    @Override
    public boolean isReparentSupported() {
        return false;
    }

    @Override
    public void layout() {
    }

    @Override
    public void paint(Graphics g) {
    }

    @Override
    public void print(Graphics g) {
    }

    @Override
    public void reparent(ContainerPeer newContainer) {
    }

    @Override
    public boolean requestFocus(Component lightweightChild, boolean temporary,
            boolean focusedWindowChangeAllowed, long time, Cause cause) {
        return false;
    }

    @Override
    public void setBackground(Color c) {
    }

    @Override
    public void setForeground(Color c) {
    }

    @Override
    public void setBounds(int x, int y, int width, int height, int op) {
    }

    @Override
    public void setEnabled(boolean e) {
    }

    @Override
    public void setFont(Font f) {
    }

    @Override
    public void setZOrder(ComponentPeer above) {
    }

    @Override
    public void updateCursorImmediately() {
    }

    @Override
    public boolean updateGraphicsData(GraphicsConfiguration gc) {
        return false;
    }
}