X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.eclipse.swt.win32.win32.x86_64%2Fsrc%2Forg%2Feclipse%2Fswt%2Fdnd%2FURLTransfer.java;fp=bundles%2Forg.eclipse.swt.win32.win32.x86_64%2Fsrc%2Forg%2Feclipse%2Fswt%2Fdnd%2FURLTransfer.java;h=1581e80a18de3fd44db236e38f7018c0c144eeec;hb=6b98970d0458754dd67f789afbd0a39e1e7ac6eb;hp=0000000000000000000000000000000000000000;hpb=56a61575ce0d27b340cb12438c8a7f303842095e;p=simantics%2Fplatform.git diff --git a/bundles/org.eclipse.swt.win32.win32.x86_64/src/org/eclipse/swt/dnd/URLTransfer.java b/bundles/org.eclipse.swt.win32.win32.x86_64/src/org/eclipse/swt/dnd/URLTransfer.java new file mode 100644 index 000000000..1581e80a1 --- /dev/null +++ b/bundles/org.eclipse.swt.win32.win32.x86_64/src/org/eclipse/swt/dnd/URLTransfer.java @@ -0,0 +1,185 @@ +/******************************************************************************* + * Copyright (c) 2000, 20007 IBM Corporation and others. + * + * This program and the accompanying materials + * are made available under the terms of the Eclipse Public License 2.0 + * which accompanies this distribution, and is available at + * https://www.eclipse.org/legal/epl-2.0/ + * + * SPDX-License-Identifier: EPL-2.0 + * + * 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 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 CFSTR_INETURLW = "UniformResourceLocatorW"; //$NON-NLS-1$ + static final int CFSTR_INETURLIDW = registerType(CFSTR_INETURLW); + 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 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); + } + transferData.result = COM.E_FAIL; + // URL is stored as a null terminated byte array + String url = ((String)object); + if (transferData.type == CFSTR_INETURLIDW) { + int charCount = url.length (); + char[] chars = new char[charCount+1]; + url.getChars (0, charCount, chars, 0); + int byteCount = chars.length * 2; + long newPtr = OS.GlobalAlloc(COM.GMEM_FIXED | COM.GMEM_ZEROINIT, byteCount); + OS.MoveMemory(newPtr, chars, byteCount); + transferData.stgmedium = new STGMEDIUM(); + transferData.stgmedium.tymed = COM.TYMED_HGLOBAL; + transferData.stgmedium.unionField = newPtr; + transferData.stgmedium.pUnkForRelease = 0; + transferData.result = COM.S_OK; + } else if (transferData.type == CFSTR_INETURLID) { + 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; + } + 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; + } +} + +/** + * 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.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; + long hMem = stgmedium.unionField; + try { + if (transferData.type == CFSTR_INETURLIDW) { + /* Ensure byteCount is a multiple of 2 bytes */ + int size = OS.GlobalSize(hMem) / 2 * 2; + if (size == 0) return null; + char[] chars = new char[size/2]; + long ptr = OS.GlobalLock(hMem); + if (ptr == 0) return null; + try { + OS.MoveMemory(chars, ptr, size); + int length = chars.length; + for (int i=0; i 0; +} + +@Override +protected boolean validate(Object object) { + return checkURL(object); +} +}