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

/*******************************************************************************
 * Copyright (c) 20007 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
 *******************************************************************************/
package org.eclipse.swt.dnd;

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

/**
 * The class URLTransfer provides a platform specific mechanism
 * for converting text in URL format represented as a java String
 * to a platform specific representation of the data and vice versa. The string
 * must contain a fully specified url.
 *
 * An example of a java String containing a URL is shown below:
 *
 *  *     String url = "http://www.eclipse.org";
 * 
*
* @see Transfer
* @since 3.4
*/
public class URLTransfer extends ByteArrayTransfer {
static URLTransfer _instance = new URLTransfer();
static final String URL = OS.NSURLPboardType.getString();
static final String URL1 = OS.kUTTypeURL.getString();
static final int URL_ID = registerType(URL);
static final int URL_ID1 = registerType(URL1);
private URLTransfer() {}
/**
* Returns the singleton instance of the URLTransfer class.
*
* @return the singleton instance of the URLTransfer class
*/
public static URLTransfer getInstance () {
return _instance;
}
/**
* This implementation of javaToNative converts a URL
* represented by a java String to a platform specific representation.
*
* @param object a java String containing a URL
* @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 (!checkURL(object) || !isSupportedType(transferData)) {
DND.error(DND.ERROR_INVALID_DATA);
}
String url = (String)object;
NSString nsString = NSString.stringWith(url);
NSString escapedString = nsString.stringByAddingPercentEscapesUsingEncoding(OS.NSUTF8StringEncoding);
transferData.data = NSURL.URLWithString(escapedString);
}
/**
* This implementation of nativeToJava converts a platform
* specific representation of a URL to a java String.
*
* @param transferData the platform specific representation of the data to be converted
* @return a java String containing a URL if the conversion was successful;
* otherwise null
*
* @see Transfer#javaToNative
*/
@Override
public Object nativeToJava(TransferData transferData){
if (!isSupportedType(transferData) || transferData.data == null) return null;
NSURL nsUrl = (NSURL) transferData.data;
NSString nsString = nsUrl.absoluteString();
nsString = nsString.stringByReplacingPercentEscapesUsingEncoding(OS.NSUTF8StringEncoding);
return nsString.getString();
}
@Override
protected int[] getTypeIds(){
if (OS.VERSION >= 0x1060) {
return new int[] {URL_ID, URL_ID1};
} else {
return new int[] {URL_ID};
}
}
@Override
protected String[] getTypeNames(){
if (OS.VERSION >= 0x1060) {
return new String[] {URL, URL1};
} else {
return new String[] {URL};
}
}
boolean checkURL(Object object) {
return object != null && (object instanceof String) && ((String)object).length() > 0;
}
@Override
protected boolean validate(Object object) {
return checkURL(object);
}
}