Mercurial > projects > dwt2
view org.eclipse.swt.gtk.linux.x86/src/org/eclipse/swt/dnd/URLTransfer.d @ 53:7e78af7adab5
[swt lin]
author | Frank Benoit <benoit@tionex.de> |
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date | Fri, 27 Mar 2009 21:29:10 +0100 |
parents | f713da8bc051 |
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/******************************************************************************* * Copyright (c) 2007, 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 *******************************************************************************/ module org.eclipse.swt.dnd.URLTransfer; 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; /** * The class <code>URLTransfer</code> provides a platform specific mechanism * for converting text in URL format represented as a java <code>String</code> * to a platform specific representation of the data and vice versa. See * <code>Transfer</code> for additional information. The string * * <p>An example of a java <code>String</code> containing a URL is shown below:</p> * * <code><pre> * String url = "http://www.eclipse.org"; * </code></pre> * * @see Transfer */ public class URLTransfer : ByteArrayTransfer { static URLTransfer _instance; private static const String TEXT_UNICODE = "text/unicode"; //$NON-NLS-1$ private static const String TEXT_XMOZURL = "text/x-moz-url"; //$NON-NLS-1$ private static int TEXT_UNICODE_ID; private static int TEXT_XMOZURL_ID; static this(){ TEXT_UNICODE_ID = registerType(TEXT_UNICODE); TEXT_XMOZURL_ID = registerType(TEXT_XMOZURL); _instance = new URLTransfer(); } private this() {} /** * 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 <code>javaToNative</code> converts a URL * represented by a java <code>String</code> to a platform specific representation. * * @param object a java <code>String</code> containing a URL * @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 (!checkURL(object) || !isSupportedType(transferData)) { DND.error(DND.ERROR_INVALID_DATA); } String16 string = stringcast(object).toWCharArray(); int byteCount = (string.length+1)*2; wchar* pValue = cast(wchar*)OS.g_malloc(byteCount); if (pValue is null) return; pValue[ 0 .. string.length ] = string[]; pValue[ string.length ] = '\0'; transferData.length = byteCount; transferData.format = 8; transferData.pValue = cast(char*)pValue; transferData.result = 1; } /** * This implementation of <code>nativeToJava</code> converts a platform * specific representation of a URL 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 a URL if the conversion was successful; * otherwise null * * @see Transfer#javaToNative */ public 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; // The string can be terminated with NULL or it is as a maximum of length size for( int i = 0; i < size; i++ ){ if( (cast(wchar*)transferData.pValue)[i] == '\0' ){ size = i; break; } } String string = String_valueOf((cast(wchar*)transferData.pValue)[ 0 .. size ]); return new ArrayWrapperString( string ); } protected int[] getTypeIds(){ return [TEXT_XMOZURL_ID, TEXT_UNICODE_ID]; } protected String[] getTypeNames(){ return [TEXT_XMOZURL, TEXT_UNICODE]; } bool checkURL(Object object) { return object !is null && (null !is cast(ArrayWrapperString)object) && (cast(ArrayWrapperString)object).array.length > 0; } protected bool validate(Object object) { return checkURL(object); } }