Mercurial > projects > dwt-mac
annotate dwt/dnd/URLTransfer.d @ 0:380af2bdd8e5
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| author | Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com> |
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| date | Sat, 09 Aug 2008 17:00:02 +0200 |
| parents | |
| children | e831403a80a9 |
| rev | line source |
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0
380af2bdd8e5
Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
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1 /******************************************************************************* * Copyright (c) 20007 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.*; /** * 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 * must contain the fully specified url. * * <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> */ public class URLTransfer : ByteArrayTransfer { static URLTransfer _instance = new URLTransfer(); static final String URL = "url "; //$NON-NLS-1$ static final int URL_ID = registerType(URL); static final String URLN = "urln"; //$NON-NLS-1$ static final int URLN_ID = registerType(URLN); private URLTransfer() {} /** * 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. * For additional information see <code>Transfer#javaToNative</code>. * * @param object a java <code>String[]</code> containing a URL * @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 (!checkURL(object) || !isSupportedType(transferData)) { DND.error(DND.ERROR_INVALID_DATA); } transferData.result = -1; String url = (String)object; int count = url.length(); char[] chars = new char[count]; url.getChars(0, count, chars, 0); int cfString = OS.CFStringCreateWithCharacters(OS.kCFAllocatorDefault, chars, count); if (cfString is 0) return; try { CFRange range = new CFRange(); range.length = chars.length; int encoding = OS.CFStringGetSystemEncoding(); int[] size = new int[1]; int numChars = OS.CFStringGetBytes(cfString, range, encoding, (byte)'?', true, null, 0, size); if (numChars is 0 || size[0] is 0) return; byte[] buffer = new byte[size[0]]; numChars = OS.CFStringGetBytes(cfString, range, encoding, (byte)'?', true, buffer, size [0], size); if (numChars is 0) return; transferData.data = new byte[][] {buffer}; transferData.result = 0; } finally { OS.CFRelease(cfString); } } /** * This implementation of <code>nativeToJava</code> converts a platform specific * representation of a URL 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 * converted * @return a java <code>String[]</code> containing a URL 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) return null; byte[] buffer = transferData.data[0]; int encoding = OS.CFStringGetSystemEncoding(); int cfString = OS.CFStringCreateWithBytes(OS.kCFAllocatorDefault, buffer, buffer.length, encoding, true); if (cfString is 0) return null; try { int length = OS.CFStringGetLength(cfString); if (length is 0) return null; char[] chars = new char[length]; CFRange range = new CFRange(); range.length = length; OS.CFStringGetCharacters(cfString, range, chars); return new String(chars); } finally { OS.CFRelease(cfString); } } protected int[] getTypeIds(){ return new int[] {URL_ID, URLN_ID}; } protected String[] getTypeNames(){ return new String[] {URL, URLN}; } bool checkURL(Object object) { return object !is null && (object instanceof String) && ((String)object).length() > 0; } protected bool validate(Object object) { return checkURL(object); } } |