Mercurial > projects > dwt-linux
view dwt/dnd/RTFTransfer.d @ 270:58ef057b3e9d
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author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 06 Jul 2008 15:37:36 +0200 |
parents | 6383fb4cdfc3 0389eeb717f8 |
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/******************************************************************************* * 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 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwt.dnd.RTFTransfer; import dwt.internal.Converter; import dwt.internal.gtk.OS; import dwt.dnd.ByteArrayTransfer; import dwt.dnd.TransferData; import dwt.dnd.DND; import dwt.dwthelper.utils; static import tango.text.Util; /** * 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 : ByteArrayTransfer { private static RTFTransfer _instance; private static const String TEXT_RTF = "text/rtf"; //$NON-NLS-1$ private static const int TEXT_RTF_ID; private static const String TEXT_RTF2 = "TEXT/RTF"; //$NON-NLS-1$ private static const int TEXT_RTF2_ID; private static const String APPLICATION_RTF = "application/rtf"; //$NON-NLS-1$ private static const int APPLICATION_RTF_ID; static this(){ TEXT_RTF_ID = registerType(TEXT_RTF); TEXT_RTF2_ID = registerType(TEXT_RTF2); APPLICATION_RTF_ID = registerType(APPLICATION_RTF); _instance = new RTFTransfer(); } private this() {} /** * 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 override void javaToNative (Object object, TransferData transferData){ transferData.result = 0; if (!checkRTF(object) || !isSupportedType(transferData)) { DND.error(DND.ERROR_INVALID_DATA); } String string = (cast(ArrayWrapperString)object).array; char* pValue = cast(char*)OS.g_malloc(string.length + 1); if (pValue is null) return; pValue[ 0 .. string.length ] = string; pValue[ string.length ] = '\0'; transferData.length = string.length; 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 override Object nativeToJava(TransferData transferData){ if ( !isSupportedType(transferData) || transferData.pValue is null ) return null; int size = transferData.format * transferData.length / 8; if (size is 0) return null; char [] chars = transferData.pValue[ 0 .. size]; return new ArrayWrapperString( chars[ 0 .. tango.text.Util.locate( chars, '\0' ) ].dup ); } protected override int[] getTypeIds() { return [TEXT_RTF_ID, TEXT_RTF2_ID, APPLICATION_RTF_ID]; } protected override String[] getTypeNames() { return [TEXT_RTF, TEXT_RTF2, APPLICATION_RTF]; } bool checkRTF(Object object) { if( object is null ) return false; ArrayWrapperString astr = cast(ArrayWrapperString)object; if( astr is null ) return false; return astr.array.length > 0; } protected override bool validate(Object object) { return checkRTF(object); } }