Mercurial > projects > dwt-mac
diff dwt/dnd/HTMLTransfer.d @ 0:380af2bdd8e5
Upload of whole dwt tree
author | Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com> |
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date | Sat, 09 Aug 2008 17:00:02 +0200 |
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children | 1a8b3cb347e0 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dwt/dnd/HTMLTransfer.d Sat Aug 09 17:00:02 2008 +0200 @@ -0,0 +1,103 @@ +/******************************************************************************* + * 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); + +HTMLTransfer() {} + +/** + * 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 = (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 && ((String)object).length() > 0); +} + +protected bool validate(Object object) { + return checkHTML(object); +} +}