Mercurial > projects > dwt-mac
view dwt/dnd/HTMLTransfer.d @ 7:e831403a80a9
Add 'cast' to casts
author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 27 Aug 2008 14:30:35 +0200 |
parents | 1a8b3cb347e0 |
children | e76aa0b07480 |
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/******************************************************************************* * Copyright (c) 2000, 2007 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 dwt.dnd; import dwt.internal.carbon.OS; /** * 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. See * <code>Transfer</code> for additional information. * * <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> */ public class HTMLTransfer : ByteArrayTransfer { static HTMLTransfer _instance = new HTMLTransfer(); static final String HTML = "HTML"; //$NON-NLS-1$ static final int HTMLID = registerType(HTML); 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. * For additional information see <code>Transfer#javaToNative</code>. * * @param object a java <code>String</code> containing HTML text * @param transferData an empty <code>TransferData</code> object; this * object will be filled in on return with the platform specific format of the data */ public void javaToNative (Object object, TransferData transferData){ if (!checkHTML(object) || !isSupportedType(transferData)) { DND.error(DND.ERROR_INVALID_DATA); } String String = cast(String)object; int count = String.length(); char[] chars = new char[count]; String.getChars(0, count, chars, 0); byte[] buffer = new byte[chars.length * 2]; OS.memmove(buffer, chars, buffer.length); transferData.data = new byte[1][]; transferData.data[0] = buffer; transferData.result = OS.noErr; } /** * This implementation of <code>nativeToJava</code> converts a platform specific * representation of HTML text to a java <code>String</code>. * For additional information see <code>Transfer#nativeToJava</code>. * * @param transferData the platform specific representation of the data to be * been converted * @return a java <code>String</code> containing HTML text if the * conversion was successful; otherwise null */ public Object nativeToJava(TransferData transferData){ if (!isSupportedType(transferData) || transferData.data is null) return null; if (transferData.data.length is 0 || transferData.data[0].length is 0) return null; byte[] buffer = transferData.data[0]; char[] chars = new char[(buffer.length + 1) / 2]; OS.memmove(chars, buffer, buffer.length); return new String(chars); } protected int[] getTypeIds() { return new int[] {HTMLID}; } protected String[] getTypeNames() { return new String[] {HTML}; } bool checkHTML(Object object) { return (object !is null && object instanceof String && (cast(String)object).length() > 0); } protected bool validate(Object object) { return checkHTML(object); } }