Mercurial > projects > dwt2
view org.eclipse.swt.gtk.linux.x86/src/org/eclipse/swt/dnd/HTMLTransfer.d @ 54:70388b0e6dad
[swt lin] compiles
author | Frank Benoit <benoit@tionex.de> |
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date | Fri, 27 Mar 2009 23:31:11 +0100 |
parents | fa9548cd8d89 |
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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 org.eclipse.swt.dnd.HTMLTransfer; import org.eclipse.swt.internal.gtk.OS; import org.eclipse.swt.dnd.ByteArrayTransfer; import org.eclipse.swt.dnd.TransferData; import org.eclipse.swt.dnd.DND; import java.lang.all; version(Tango){ static import tango.text.Util; } else { // Phobos } /** * The class <code>HTMLTransfer</code> provides a platform specific mechanism * for converting text in HTML 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 HTML text is shown * below:</p> * * <code><pre> * String htmlData = "<p>This is a paragraph of text.</p>"; * </code></pre> * * @see Transfer */ public class HTMLTransfer : ByteArrayTransfer { private static HTMLTransfer _instance; private static const String TEXT_HTML = "text/html"; //$NON-NLS-1$ private static const int TEXT_HTML_ID; private static const String TEXT_HTML2 = "TEXT/HTML"; //$NON-NLS-1$ private static const int TEXT_HTML2_ID; static this(){ _instance = new HTMLTransfer(); TEXT_HTML_ID = registerType(TEXT_HTML); TEXT_HTML2_ID = registerType(TEXT_HTML2); } private this() {} /** * Returns the singleton instance of the HTMLTransfer class. * * @return the singleton instance of the HTMLTransfer class */ public static HTMLTransfer getInstance () { return _instance; } /** * This implementation of <code>javaToNative</code> converts HTML-formatted text * represented by a java <code>String</code> to a platform specific representation. * * @param object a java <code>String</code> containing HTML 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 (!checkHTML(object) || !isSupportedType(transferData)) { DND.error(DND.ERROR_INVALID_DATA); } String string = stringcast(object); char* pValue = cast(char*)OS.g_malloc(string.length); if (pValue is null) return; pValue[0 .. string.length ] = string; 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 HTML 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 HTML 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; /* Ensure byteCount is a multiple of 2 bytes */ int size = (transferData.format * transferData.length / 8) / 2 * 2; if (size <= 0) return null; String chars = transferData.pValue[ 0 .. size ]._idup(); int end = chars.indexOf('\0'); return new ArrayWrapperString( (end is -1 )? chars : chars[ 0 .. end ] ); } protected override int[] getTypeIds() { return [TEXT_HTML_ID, TEXT_HTML2_ID]; } protected override String[] getTypeNames() { return [TEXT_HTML, TEXT_HTML2]; } bool checkHTML(Object object) { if( object is null ) return false; auto arr = cast(ArrayWrapperString)object; if( arr is null ) return false; if( arr.array.length is 0 ) return false; return true; } protected override bool validate(Object object) { return checkHTML(object); } }