| package org.eclipse.swt.dnd; |
| |
| /* |
| * Copyright (c) 2000, 2002 IBM Corp. All rights reserved. |
| * This file is made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| */ |
| |
| import org.eclipse.swt.internal.Converter; |
| import org.eclipse.swt.internal.carbon.OS; |
| |
| /** |
| * The class <code>TextTransfer</code> provides a platform specific mechanism |
| * for converting plain text 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. |
| * |
| * <p>An example of a java <code>String</code> containing plain text is shown |
| * below:</p> |
| * |
| * <code><pre> |
| * String textData = "Hello World"; |
| * </code></pre> |
| */ |
| public class TextTransfer extends ByteArrayTransfer { |
| |
| private static TextTransfer _instance = new TextTransfer(); |
| private static final String TYPENAME1 = "TEXT"; |
| private static final int TYPEID1 = OS.kScrapFlavorTypeText; |
| |
| private TextTransfer() { |
| } |
| /** |
| * Returns the singleton instance of the TextTransfer class. |
| * |
| * @return the singleton instance of the TextTransfer class |
| */ |
| public static TextTransfer getInstance () { |
| return _instance; |
| } |
| |
| /** |
| * This implementation of <code>javaToNative</code> converts plain text |
| * 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 text |
| * @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 (object == null || !(object instanceof String)) { |
| transferData.result = -1; |
| return; |
| } |
| byte [] buffer = Converter.wcsToMbcs (null, (String)object, true); |
| super.javaToNative(buffer, transferData); |
| } |
| |
| /** |
| * This implementation of <code>nativeToJava</code> converts a platform specific |
| * representation of plain text 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 text if the |
| * conversion was successful; otherwise null |
| */ |
| public Object nativeToJava(TransferData transferData){ |
| // get byte array from super |
| byte[] buffer = (byte[])super.nativeToJava(transferData); |
| if (buffer == null) return null; |
| // convert byte array to a string |
| char [] unicode = Converter.mbcsToWcs (null, buffer); |
| String string = new String (unicode); |
| int end = string.indexOf('\0'); |
| return (end == -1) ? string : string.substring(0, end); |
| } |
| |
| protected String[] getTypeNames() { |
| return new String[] { TYPENAME1 }; |
| } |
| |
| protected int[] getTypeIds() { |
| return new int[] { TYPEID1 }; |
| } |
| } |