Attachment 39098 Details for Bug 100095 – Carbon implementation of URLTransfer

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[patch] Carbon implementation of URLTransfer

URLTransferMAC.java (text/plain), 5.02 KB, created by Veronika Irvine

on 2006-04-20 15:57:51 EDT

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Creator: Veronika Irvine

Created: 2006-04-20 15:57:51 EDT

Size: 5.02 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2000, 2005 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.carbon.CFRange;
>import org.eclipse.swt.internal.carbon.OS;
>
>/**
> * The class <code>URLTransfer</code> provides a platform specific mechanism 
> * for converting text in URL format represented as a java <code>String[]</code> 
> * to a platform specific representation of the data and vice versa.  See 
> * <code>Transfer</code> for additional information. The first string in the 
> * array is mandatory and must contain the fully specified url.  The second 
> * string in the array is optional and if present contains the title for the
> * page.
> * 
> * <p>An example of a java <code>String[]</code> containing a URL is shown 
> * below:</p>
> * 
> * <code><pre>
> *     String[] urlData = new String[] {"http://www.eclipse.org", "Eclipse.org Main Page"};
> * </code></pre>
> */
>public class URLTransfer extends ByteArrayTransfer {
>
>	static URLTransfer _instance = new URLTransfer();
>	static final String URL = "url "; //$NON-NLS-1$
>	static final int URL_ID = registerType(URL);
>	static final String URLN = "urln"; //$NON-NLS-1$
>	static final int URLN_ID = registerType(URLN);
>
>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 <code>javaToNative</code> converts a URL and optionally a title
> * represented by a java <code>String[]</code> to a platform specific representation.
> * For additional information see <code>Transfer#javaToNative</code>.
> * 
> * @param object a java <code>String[]</code> containing a URL and optionally, a title
> * @param transferData an empty <code>TransferData</code> object; this
> *  object will be filled in on return with the platform specific format of the data
> */
>public void javaToNative (Object object, TransferData transferData){
>	if (!checkURL(object) || !isSupportedType(transferData)) {
>		DND.error(DND.ERROR_INVALID_DATA);
>	}
>	transferData.result = -1;
>	String[] urlInfo = (String[])object;
>	String url = urlInfo[0];
>	int count = url.length();
>	char[] chars = new char[count];
>	url.getChars(0, count, chars, 0);
>	int cfstring = OS.CFStringCreateWithCharacters(OS.kCFAllocatorDefault, chars, count);
>	if (cfstring == 0) return;
>	try {
>		CFRange range = new CFRange();
>		range.length = chars.length;
>		int encoding = OS.CFStringGetSystemEncoding();
>		int[] size = new int[1];
>		int numChars = OS.CFStringGetBytes(cfstring, range, encoding, (byte)'?', true, null, 0, size);
>		if (numChars == 0 || size[0] == 0) return;
>		byte[] buffer = new byte[size[0]];
>		numChars = OS.CFStringGetBytes(cfstring, range, encoding, (byte)'?', true, buffer, size [0], size);
>		if (numChars == 0) return;
>		transferData.data = new byte[1][];
>		transferData.data[0] = buffer;
>		transferData.result = 0;
>	} finally {
>		OS.CFRelease(cfstring);
>	}
>}
>
>/**
> * This implementation of <code>nativeToJava</code> converts a platform specific 
> * representation of a URL and optionally, a title to a java <code>String[]</code>.
> * For additional information see <code>Transfer#nativeToJava</code>.
> * 
> * @param transferData the platform specific representation of the data to be 
> * been converted
> * @return a java <code>String[]</code> containing a URL and optionally a title if the 
> * conversion was successful; otherwise null
> */
>public Object nativeToJava(TransferData transferData){
>	if (!isSupportedType(transferData) || transferData.data == null) return null;
>	if (transferData.data.length == 0) return null;
>	byte[] buffer = transferData.data[0];
>	int encoding = OS.CFStringGetSystemEncoding();
>	int cfstring = OS.CFStringCreateWithBytes(OS.kCFAllocatorDefault, buffer, buffer.length, encoding, true);
>	if (cfstring == 0) return null;
>	try {
>		int length = OS.CFStringGetLength(cfstring);
>		if (length == 0) return null;
>		char[] chars = new char[length];
>		CFRange range = new CFRange();
>		range.length = length;
>		OS.CFStringGetCharacters(cfstring, range, chars);
>		return new String[]{ new String(chars)};
>	} finally {
>		OS.CFRelease(cfstring);
>	}
>}
>
>protected int[] getTypeIds(){
>	return new int[] {URL_ID, URLN_ID};
>}
>
>protected String[] getTypeNames(){
>	return new String[] {URL, URLN}; 
>}
>
>boolean checkURL(Object object) {
>	if (object == null || !(object instanceof String[]) || ((String[])object).length == 0) return false;
>	String[] strings = (String[])object;
>	if (strings[0] == null || strings[0].length() == 0) return false;
>	return true;
>}
>
>protected boolean validate(Object object) {
>	return checkURL(object);
>}
>}

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Attachments on bug 100095: 39097 | 39098 | 39099