org.eclipse.swt.dnd.FileTransfer Maven / Gradle / Ivy

/*******************************************************************************
 * Copyright (c) 2000, 2012 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Outhink - support for typeFileURL
 *******************************************************************************/
package org.eclipse.swt.dnd;

import org.eclipse.swt.internal.cocoa.*;

/**
 * The class FileTransfer provides a platform specific mechanism
 * for converting a list of files represented as a java String[] to a
 * platform specific representation of the data and vice versa.
 * Each String in the array contains the absolute path for a single
 * file or directory.
 *
 * An example of a java String[] containing a list of files is shown
 * below:
 *
 *  *     File file1 = new File("C:\temp\file1");
 *     File file2 = new File("C:\temp\file2");
 *     String[] fileData = new String[2];
 *     fileData[0] = file1.getAbsolutePath();
 *     fileData[1] = file2.getAbsolutePath();
 * 
*
* @see Transfer
*/
public class FileTransfer extends ByteArrayTransfer {
static FileTransfer _instance = new FileTransfer();
static final String ID_NAME = OS.NSFilenamesPboardType.getString();
static final int ID = registerType(ID_NAME);
static final String ID1_NAME = OS.kUTTypeFileURL.getString();
static final int ID1 = registerType(ID1_NAME);
FileTransfer() {}
/**
* Returns the singleton instance of the FileTransfer class.
*
* @return the singleton instance of the FileTransfer class
*/
public static FileTransfer getInstance () {
return _instance;
}
/**
* This implementation of javaToNative converts a list of file names
* represented by a java String[] to a platform specific representation.
* Each String in the array contains the absolute path for a single
* file or directory.
*
* @param object a java String[] containing the file names to be converted
* @param transferData an empty TransferData object that will
* be filled in on return with the platform specific format of the data
*
* @see Transfer#nativeToJava
*/
@Override
public void javaToNative(Object object, TransferData transferData) {
if (!checkFile(object) || !isSupportedType(transferData)) {
DND.error(DND.ERROR_INVALID_DATA);
}
String[] files = (String[])object;
int length = files.length;
NSMutableArray array = NSMutableArray.arrayWithCapacity(length);
for (int i = 0; i < length; i++) {
String fileName = files[i];
NSString string = NSString.stringWith(fileName);
array.addObject(string);
}
transferData.data = array;
}
/**
* This implementation of nativeToJava converts a platform specific
* representation of a list of file names to a java String[].
* Each String in the array contains the absolute path for a single file or directory.
*
* @param transferData the platform specific representation of the data to be converted
* @return a java String[] containing a list of file names if the conversion
* was successful; otherwise null
*
* @see Transfer#javaToNative
*/
@Override
public Object nativeToJava(TransferData transferData) {
if (!isSupportedType(transferData) || transferData.data == null) return null;
NSArray array = (NSArray) transferData.data;
if (array.count() == 0) return null;
int count = (int)/*64*/array.count();
String[] fileNames = new String[count];
for (int i=0; i= 0x1060) {
return new int[] {ID, ID1};
} else {
return new int[] {ID};
}
}
@Override
protected String[] getTypeNames(){
if (OS.VERSION >= 0x1060) {
return new String[] {ID_NAME, ID1_NAME};
} else {
return new String[] {ID_NAME};
}
}
boolean checkFile(Object object) {
if (object == null || !(object instanceof String[]) || ((String[])object).length == 0) return false;
String[] strings = (String[])object;
for (int i = 0; i < strings.length; i++) {
if (strings[i] == null || strings[i].length() == 0) return false;
}
return true;
}
@Override
protected boolean validate(Object object) {
return checkFile(object);
}
}