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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/RTFTransfer.java')
-rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/RTFTransfer.java | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/RTFTransfer.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/RTFTransfer.java new file mode 100644 index 0000000000..74aae33125 --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/gtk/org/eclipse/swt/dnd/RTFTransfer.java @@ -0,0 +1,114 @@ +/******************************************************************************* + * Copyright (c) 2000, 2008 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.*; +import org.eclipse.swt.internal.gtk.*; + +/** + * The class <code>RTFTransfer</code> provides a platform specific mechanism + * for converting text in RTF format 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 RTF text is shown + * below:</p> + * + * <code><pre> + * String rtfData = "{\\rtf1{\\colortbl;\\red255\\green0\\blue0;}\\uc1\\b\\i Hello World}"; + * </code></pre> + * + * @see Transfer + */ +public class RTFTransfer extends ByteArrayTransfer { + + private static RTFTransfer _instance = new RTFTransfer(); + private static final String TEXT_RTF = "text/rtf"; //$NON-NLS-1$ + private static final int TEXT_RTF_ID = registerType(TEXT_RTF); + private static final String TEXT_RTF2 = "TEXT/RTF"; //$NON-NLS-1$ + private static final int TEXT_RTF2_ID = registerType(TEXT_RTF2); + private static final String APPLICATION_RTF = "application/rtf"; //$NON-NLS-1$ + private static final int APPLICATION_RTF_ID = registerType(APPLICATION_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 <code>javaToNative</code> converts RTF-formatted text + * represented by a java <code>String</code> to a platform specific representation. + * + * @param object a java <code>String</code> containing RTF 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){ + transferData.result = 0; + if (!checkRTF(object) || !isSupportedType(transferData)) { + DND.error(DND.ERROR_INVALID_DATA); + } + String string = (String)object; + byte [] buffer = Converter.wcsToMbcs (null, string, true); + int /*long*/ pValue = OS.g_malloc(buffer.length); + if (pValue == 0) return; + OS.memmove(pValue, buffer, buffer.length); + transferData.length = buffer.length - 1; + transferData.format = 8; + transferData.pValue = pValue; + transferData.result = 1; +} + +/** + * This implementation of <code>nativeToJava</code> converts a platform specific + * representation of RTF 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 RTF text if the conversion was successful; + * otherwise null + * + * @see Transfer#javaToNative + */ +public Object nativeToJava(TransferData transferData){ + if ( !isSupportedType(transferData) || transferData.pValue == 0 ) return null; + int size = transferData.format * transferData.length / 8; + if (size == 0) return null; + byte[] buffer = new byte[size]; + OS.memmove(buffer, transferData.pValue, size); + char [] chars = Converter.mbcsToWcs (null, buffer); + String string = new String (chars); + int end = string.indexOf('\0'); + return (end == -1) ? string : string.substring(0, end); +} + +protected int[] getTypeIds() { + return new int[] {TEXT_RTF_ID, TEXT_RTF2_ID, APPLICATION_RTF_ID}; +} + +protected String[] getTypeNames() { + return new String[] {TEXT_RTF, TEXT_RTF2, APPLICATION_RTF}; +} + +boolean checkRTF(Object object) { + return (object != null && object instanceof String && ((String)object).length() > 0); +} + +protected boolean validate(Object object) { + return checkRTF(object); +} +} |