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/*
* Copyright (c) 2010, 2016, 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 com.sun.glass.ui;
import java.lang.annotation.Native;
import java.io.IOException;
import java.util.List;
import java.util.ArrayList;
import java.io.File;
public class CommonDialogs {
/**
* Available file chooser types.
*
* @see #showFileChooser
*/
public static final class Type {
@Native public static final int OPEN = 0;
@Native public static final int SAVE = 1;
}
/**
* Provides a mechanism to filter different kinds of file name extensions.
*
* The following example creates an {@code ExtensionFilter} that will show
* {@code txt} files:
*
* List extensions = new ArrayList();
* extensions.add("*.txt");
* ExtensionFilter filter = new ExtensionFilter("Text files", extensions);
* List filters = new ArrayList();
* filters.add(filters);
* FileChooser.show(..., filters);
*
*
* @see #showFileChooser
*/
public final static class ExtensionFilter {
private final String description;
private final List extensions;
/**
* Creates an {@code ExtensionFilter} with the specified description
* and the file name extensions.
*
* @param description the textual description for the filter
* @param extensions the accepted file name extensions
* @throws IllegalArgumentException
* if the description of the filter is {@code null} or empty;
* if the extensions is {@code null}, empty or contains an empty string
*/
public ExtensionFilter(String description, List extensions) {
Application.checkEventThread();
if (description == null || description.trim().isEmpty()) {
throw new IllegalArgumentException("Description parameter must be non-null and not empty");
}
if (extensions == null || extensions.isEmpty()) {
throw new IllegalArgumentException("Extensions parameter must be non-null and not empty");
}
for (String extension : extensions) {
if (extension == null || extension.length() == 0) {
throw new IllegalArgumentException("Each extension must be non-null and not empty");
}
}
this.description = description;
this.extensions = extensions;
}
public String getDescription() {
Application.checkEventThread();
return description;
}
public List getExtensions() {
Application.checkEventThread();
return extensions;
}
// Called from native
private String[] extensionsToArray() {
Application.checkEventThread();
return extensions.toArray(new String[extensions.size()]);
}
}
/**
* An object representing the result of showing a file chooser dialog.
*/
public final static class FileChooserResult {
private final List files;
private final ExtensionFilter filter;
/**
* Creates a new result object.
* @param files should not be null, may be an empty list
*/
public FileChooserResult(List files, ExtensionFilter filter) {
if (files == null) {
throw new NullPointerException("files should not be null");
}
this.files = files;
this.filter = filter;
}
/**
* Creates an empty results object.
* Used when a user cancels a file chooser dialog.
*/
public FileChooserResult() {
this(new ArrayList(), null);
}
/**
* Returns a list of selected files.
*
* If a user cancels the dialog then this list is empty.
*
* Note that in case of a SAVE dialog the file name extension
* corresponding to the selected ExtensionFilter may not be appended
* automatically. Client code is responsible for checking the file
* name and appending the extension if needed. Use {@link
* #getExtensionFilter} to obtain the selected File Type filter.
*/
public List getFiles() {
return files;
}
/**
* Returns the ExtensionFilter selected by a user when a
* file chooser dialog is closed.
*
* A reference to one of the extension filter objects passed to the
* showFileChooser() method. May be null.
*/
public ExtensionFilter getExtensionFilter() {
return filter;
}
}
private CommonDialogs() {
}
/**
* Creates a native file chooser that lets the user select files.
*
* @param owner the owner window for this file chooser (may be null)
* @param folder the initial folder, may be {@code null}
* @param filename the initial file name for a SAVE dialog (may be null)
* @param title the title of the file chooser
* @param type the type of the file chooser, one of the constants from {@link Type}
* @param multipleMode enables or disable multiple file selections
* @param extensionFilters the filters of the file chooser
* @param defaultFilterIndex the zero-based index of the filter selected by default
* @throws IllegalArgumentException
* if the initial folder is an invalid folder;
* if the type doesn't equal one of the constants from {@link Type}
* @return the files that the user selects and the selected extension
* filter. If the user cancels the file chooser, the method returns empty
* results object.
*/
public static FileChooserResult showFileChooser(Window owner, File folder, String filename, String title, int type,
boolean multipleMode, List extensionFilters, int defaultFilterIndex)
{
Application.checkEventThread();
String _folder = convertFolder(folder);
if (filename == null) {
filename = "";
}
if (type != Type.OPEN && type != Type.SAVE) {
throw new IllegalArgumentException("Type parameter must be equal to one of the constants from Type");
}
ExtensionFilter[] _extensionFilters = null;
if (extensionFilters != null) {
_extensionFilters = extensionFilters.toArray(new ExtensionFilter[extensionFilters.size()]);
}
if (extensionFilters == null
|| extensionFilters.isEmpty()
|| defaultFilterIndex < 0
|| defaultFilterIndex >= extensionFilters.size()) {
defaultFilterIndex = 0;
}
return Application.GetApplication().
staticCommonDialogs_showFileChooser(owner, _folder, filename, convertTitle(title), type, multipleMode, _extensionFilters, defaultFilterIndex);
}
/**
* Creates a native folder chooser that lets the user selects folder.
*
* @param owner the owner window for this folder chooser (may be null)
* @param folder the initial folder, may be {@code null}
* @param title the title of the folder chooser
* @return the folder that the user selects. If the user cancels the folder chooser,
* the method returns null.
*/
public static File showFolderChooser(Window owner, File folder, String title) {
Application.checkEventThread();
return Application.GetApplication().staticCommonDialogs_showFolderChooser(owner, convertFolder(folder), convertTitle(title));
}
private static String convertFolder(File folder) {
if (folder != null) {
if (folder.isDirectory()) {
try {
return folder.getCanonicalPath();
} catch (IOException e) {
throw new IllegalArgumentException("Unable to get a canonical path for folder", e);
}
} else {
throw new IllegalArgumentException("Folder parameter must be a valid folder");
}
}
return "";
}
private static String convertTitle(String title) {
return (title != null) ? title : "";
}
/* a helper method for some platform implementations */
protected static FileChooserResult createFileChooserResult(String[] files,
ExtensionFilter[] extensionFilters, int index)
{
List list = new ArrayList();
for (String s : files) {
if (s != null) {
list.add(new File(s));
}
}
return new FileChooserResult(list,
extensionFilters == null || index < 0 || index >= extensionFilters.length ?
null : extensionFilters[index]);
}
}
