1 files changed, 139 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/URLTransfer.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/URLTransfer.java
new file mode 100644
index 0000000000..5aedfb1ff1
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/URLTransfer.java
@@ -0,0 +1,139 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 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.ole.win32.*;
+import org.eclipse.swt.internal.win32.*;
+
+/**
+ * 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. The string
+ * must contain a fully specified url.
+ * 
+ * <p>An example of a java <code>String</code> containing a URL is shown below:</p>
+ * 
+ * <code><pre>
+ *     String url = "http://www.eclipse.org";
+ * </code></pre>
+ *
+ * @see Transfer
+ * @since 3.4
+ */
+public class URLTransfer extends ByteArrayTransfer {
+
+	static URLTransfer _instance = new URLTransfer();
+	static final String CFSTR_INETURL = "UniformResourceLocator"; //$NON-NLS-1$
+	static final int CFSTR_INETURLID = registerType(CFSTR_INETURL);
+
+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
+ * represented by a java <code>String</code> to a platform specific representation.
+ * 
+ * @param object a java <code>String</code> containing a URL
+ * @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 (!checkURL(object) || !isSupportedType(transferData)) {
+		DND.error(DND.ERROR_INVALID_DATA);
+	}
+	transferData.result = COM.E_FAIL;
+	// URL is stored as a null terminated byte array
+	String url = ((String)object);
+	int count = url.length();
+	char[] chars = new char[count + 1];
+	url.getChars(0, count, chars, 0);
+	int codePage = OS.GetACP();
+	int cchMultiByte = OS.WideCharToMultiByte(codePage, 0, chars, -1, null, 0, null, null);
+	if (cchMultiByte == 0) {
+		transferData.stgmedium = new STGMEDIUM();
+		transferData.result = COM.DV_E_STGMEDIUM;
+		return;
+	}
+	int /*long*/ lpMultiByteStr = OS.GlobalAlloc(OS.GMEM_FIXED | OS.GMEM_ZEROINIT, cchMultiByte);
+	OS.WideCharToMultiByte(codePage, 0, chars, -1, lpMultiByteStr, cchMultiByte, null, null);
+	transferData.stgmedium = new STGMEDIUM();
+	transferData.stgmedium.tymed = COM.TYMED_HGLOBAL;
+	transferData.stgmedium.unionField = lpMultiByteStr;
+	transferData.stgmedium.pUnkForRelease = 0;
+	transferData.result = COM.S_OK;
+	return;
+}
+
+/**
+ * This implementation of <code>nativeToJava</code> converts a platform 
+ * specific representation of a URL 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 a URL if the conversion was successful;
+ * 		otherwise null
+ * 
+ * @see Transfer#javaToNative
+ */
+public Object nativeToJava(TransferData transferData){
+	if (!isSupportedType(transferData) || transferData.pIDataObject == 0) return null;
+	IDataObject data = new IDataObject(transferData.pIDataObject);
+	data.AddRef();
+	STGMEDIUM stgmedium = new STGMEDIUM();
+	FORMATETC formatetc = transferData.formatetc;
+	stgmedium.tymed = COM.TYMED_HGLOBAL;	
+	transferData.result = getData(data, formatetc, stgmedium);
+	data.Release();	
+	if (transferData.result != COM.S_OK) return null;
+	int /*long*/ hMem = stgmedium.unionField;
+	try {
+		int /*long*/ lpMultiByteStr = OS.GlobalLock(hMem);
+		if (lpMultiByteStr == 0) return null;
+		try {
+			int codePage = OS.GetACP();
+			int cchWideChar  = OS.MultiByteToWideChar (codePage, OS.MB_PRECOMPOSED, lpMultiByteStr, -1, null, 0);
+			if (cchWideChar == 0) return null;
+			char[] lpWideCharStr = new char [cchWideChar - 1];
+			OS.MultiByteToWideChar (codePage, OS.MB_PRECOMPOSED, lpMultiByteStr, -1, lpWideCharStr, lpWideCharStr.length);
+			return new String(lpWideCharStr);
+		} finally {
+			OS.GlobalUnlock(hMem);
+		}
+	} finally {
+		OS.GlobalFree(hMem);
+	}
+}
+
+protected int[] getTypeIds(){
+	return new int[] {CFSTR_INETURLID};
+}
+
+protected String[] getTypeNames(){
+	return new String[] {CFSTR_INETURL}; 
+}
+
+boolean checkURL(Object object) {
+	return object != null && (object instanceof String) && ((String)object).length() > 0;
+}
+
+protected boolean validate(Object object) {
+	return checkURL(object);
+}
+}