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%2FRTFTransfer.java;fp=bundles%2Forg.eclipse.swt.win32.win32.x86_64%2Fsrc%2Forg%2Feclipse%2Fswt%2Fdnd%2FRTFTransfer.java;h=ab1fbb1f8d4e8acd6bd5f1a4d2f1468c36777837;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/RTFTransfer.java b/bundles/org.eclipse.swt.win32.win32.x86_64/src/org/eclipse/swt/dnd/RTFTransfer.java new file mode 100644 index 000000000..ab1fbb1f8 --- /dev/null +++ b/bundles/org.eclipse.swt.win32.win32.x86_64/src/org/eclipse/swt/dnd/RTFTransfer.java @@ -0,0 +1,145 @@ +/******************************************************************************* + * Copyright (c) 2000, 2012 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 RTFTransfer provides a platform specific mechanism + * for converting text in RTF format represented as a java String + * to a platform specific representation of the data and vice versa. + * + *

An example of a java String containing RTF text is shown + * below:

+ * + *

+ *     String rtfData = "{\\rtf1{\\colortbl;\\red255\\green0\\blue0;}\\uc1\\b\\i Hello World}";
+ * 
+ * + * @see Transfer + */ +public class RTFTransfer extends ByteArrayTransfer { + + private static RTFTransfer _instance = new RTFTransfer(); + private static final String CF_RTF = "Rich Text Format"; //$NON-NLS-1$ + private static final int CF_RTFID = registerType(CF_RTF); + +private RTFTransfer() {} + +/** + * Returns the singleton instance of the RTFTransfer class. + * + * @return the singleton instance of the RTFTransfer class + */ +public static RTFTransfer getInstance () { + return _instance; +} + +/** + * This implementation of javaToNative converts RTF-formatted text + * represented by a java String to a platform specific representation. + * + * @param object a java String containing RTF text + * @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 (!checkRTF(object) || !isSupportedType(transferData)) { + DND.error(DND.ERROR_INVALID_DATA); + } + // CF_RTF is stored as a null terminated byte array + String string = (String)object; + int count = string.length(); + char[] chars = new char[count + 1]; + string.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(COM.GMEM_FIXED | COM.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 nativeToJava converts a platform specific + * representation of RTF text to a java String. + * + * @param transferData the platform specific representation of the data to be converted + * @return a java String containing RTF text 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 { + 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); + } +} + +@Override +protected int[] getTypeIds(){ + return new int[] {CF_RTFID}; +} + +@Override +protected String[] getTypeNames(){ + return new String[] {CF_RTF}; +} + +boolean checkRTF(Object object) { + return (object != null && object instanceof String && ((String)object).length() > 0); +} + +@Override +protected boolean validate(Object object) { + return checkRTF(object); +} +}