diff dwt/dnd/HTMLTransfer.d @ 0:380af2bdd8e5

Upload of whole dwt tree
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
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);
+}
+}