1 files changed, 144 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/carbon/org/eclipse/swt/dnd/TextTransfer.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/carbon/org/eclipse/swt/dnd/TextTransfer.java
new file mode 100644
index 0000000000..f9c17e81d6
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/carbon/org/eclipse/swt/dnd/TextTransfer.java
@@ -0,0 +1,144 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2009 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>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.
+ * 
+ * <p>An example of a java <code>String</code> containing plain text is shown 
+ * below:</p>
+ * 
+ * <code><pre>
+ *     String textData = "Hello World";
+ * </code></pre>
+ * 
+ * @see Transfer
+ */
+public class TextTransfer extends ByteArrayTransfer {
+
+	static TextTransfer _instance = new TextTransfer();
+	static final String UT16 = "ut16"; //$NON-NLS-1$
+	static final String UTF8 = "utf8"; //$NON-NLS-1$
+	static final int UT16ID = OS.kScrapFlavorTypeUTF16External;
+	static final int UTF8ID = ('u'<<24) + ('t'<<16) + ('f'<<8) + '8';
+
+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.
+ * 
+ * @param object a java <code>String</code> containing text
+ * @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 (!checkText(object) || !isSupportedType(transferData)) {
+		DND.error(DND.ERROR_INVALID_DATA);
+	}
+	String string = (String)object;
+	char[] chars = new char[string.length()];
+	string.getChars (0, chars.length, chars, 0);
+	transferData.result = -1;
+	
+	switch (transferData.type) {
+		case UTF8ID: 
+		case UT16ID: {
+			int encoding = transferData.type == UTF8ID ? OS.kCFStringEncodingUTF8 : OS.kCFStringEncodingUnicode;
+			int cfstring = OS.CFStringCreateWithCharacters(OS.kCFAllocatorDefault, chars, chars.length);
+			if (cfstring == 0) return;
+			byte[] buffer = null;
+			try {
+				CFRange range = new CFRange();
+				range.length = chars.length;
+				int[] size = new int[1];
+				int numChars = OS.CFStringGetBytes(cfstring, range, encoding, (byte)'?', true, null, 0, size);
+				if (numChars == 0) return;
+				buffer = new byte[size[0]];
+				numChars = OS.CFStringGetBytes(cfstring, range, encoding, (byte)'?', true, buffer, size [0], size);
+				if (numChars == 0) return;
+			} finally {
+				OS.CFRelease(cfstring);
+			}
+			transferData.data = new byte[1][];
+			transferData.data[0] = buffer;
+			transferData.result = OS.noErr;
+			break;
+		}
+	}
+}
+
+/**
+ * This implementation of <code>nativeToJava</code> converts a platform specific 
+ * representation of plain text to a java <code>String</code>.
+ * 
+ * @param transferData the platform specific representation of the data to be converted
+ * @return a java <code>String</code> containing text if the conversion was successful; otherwise null
+ * 
+ * @see Transfer#javaToNative
+ */
+public Object nativeToJava(TransferData transferData){
+	if (!isSupportedType(transferData) || transferData.data == null) return null;
+	if (transferData.data.length == 0 || transferData.data[0].length == 0) return null;
+	byte[] buffer = transferData.data[0];
+	switch (transferData.type) {
+		case UTF8ID: 
+		case UT16ID: {
+			int encoding = transferData.type == UTF8ID ? OS.kCFStringEncodingUTF8 : OS.kCFStringEncodingUnicode;
+			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(chars);
+			} finally {
+				OS.CFRelease(cfstring);
+			}
+		}
+	}
+	return null;
+}
+
+protected int[] getTypeIds() {
+	return new int[] {UT16ID, UTF8ID};
+}
+
+protected String[] getTypeNames() {
+	return new String[] {UT16, UTF8};
+}
+
+boolean checkText(Object object) {
+	return (object != null && object instanceof String && ((String)object).length() > 0);
+}
+protected boolean validate(Object object) {
+	return checkText(object);
+}
+}