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/*******************************************************************************
* Copyright (c) 2000, 2008 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 <code>FileTransfer</code> provides a platform specific mechanism
* for converting a list of files represented as a java <code>String[]</code> to a
* platform specific representation of the data and vice versa.
* Each <code>String</code> in the array contains the absolute path for a single
* file or directory.
*
* <p>An example of a java <code>String[]</code> containing a list of files is shown
* below:</p>
*
* <code><pre>
* 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();
* </code></pre>
*
* @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 = "public.file-url";
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 <code>javaToNative</code> converts a list of file names
* represented by a java <code>String[]</code> to a platform specific representation.
* Each <code>String</code> in the array contains the absolute path for a single
* file or directory.
*
* @param object a java <code>String[]</code> containing the file names to be converted
* @param transferData an empty <code>TransferData</code> object that will
* be filled in on return with the platform specific format of the data
*
* @see Transfer#nativeToJava
*/
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 <code>nativeToJava</code> converts a platform specific
* representation of a list of file names to a java <code>String[]</code>.
* 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 <code>String[]</code> containing a list of file names if the conversion
* was successful; otherwise null
*
* @see Transfer#javaToNative
*/
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<count; i++) {
NSString string = new NSString(array.objectAtIndex(i));
fileNames[i] = string.getString();
}
return fileNames;
}
protected int[] getTypeIds(){
if (OS.VERSION >= 0x1060) {
return new int[] {ID, ID1};
} else {
return new int[] {ID};
}
}
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;
}
protected boolean validate(Object object) {
return checkFile(object);
}
}
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