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annotate dwt/dnd/URLTransfer.d @ 122:2e671fa40eec

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Ported dwt.dnd, dwt.opengl, dwt.printing and dwt.program
author Jacob Carlborg <doob@me.com>
date Wed, 31 Dec 2008 21:01:13 +0100
parents d0d0b721dbcc
children
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rev   line source
122
2e671fa40eec Ported dwt.dnd, dwt.opengl, dwt.printing and dwt.program
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1 /*******************************************************************************
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2 * Copyright (c) 20007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *
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11 * Port to the D programming language:
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12 * Jacob Carlborg <doob@me.com>
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13 *******************************************************************************/
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14 module dwt.dnd.URLTransfer;
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15
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16 import dwt.dwthelper.utils;
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17
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18 import dwt.internal.cocoa.NSString;
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19 import dwt.internal.cocoa.NSURL;
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20 import dwt.internal.cocoa.OS;
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21
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22 import dwt.dnd.ByteArrayTransfer;
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23 import dwt.dnd.DND;
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24 import dwt.dnd.TransferData;
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25
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26 /**
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27 * The class <code>URLTransfer</code> provides a platform specific mechanism
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28 * for converting text in URL format represented as a java <code>String</code>
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29 * to a platform specific representation of the data and vice versa. The string
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30 * must contain a fully specified url.
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31 *
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32 * <p>An example of a java <code>String</code> containing a URL is shown below:</p>
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33 *
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34 * <code><pre>
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35 * String url = "http://www.eclipse.org";
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36 * </code></pre>
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37 *
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38 * @see Transfer
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39 */
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40 public class URLTransfer : ByteArrayTransfer {
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41
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42 static URLTransfer _instance;
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43 static const String URL;
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44 static const int URL_ID;
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45
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46 static this ()
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47 {
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48 _instance = new URLTransfer();
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49 URL = OS.NSURLPboardType.getString();
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50 URL_ID = registerType(URL);
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51 }
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52
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53 private this() {}
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54
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55 /**
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56 * Returns the singleton instance of the URLTransfer class.
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57 *
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58 * @return the singleton instance of the URLTransfer class
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59 */
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60 public static URLTransfer getInstance () {
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61 return _instance;
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62 }
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63
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64 /**
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65 * This implementation of <code>javaToNative</code> converts a URL
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66 * represented by a java <code>String</code> to a platform specific representation.
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67 *
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68 * @param object a java <code>String</code> containing a URL
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69 * @param transferData an empty <code>TransferData</code> object that will
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70 * be filled in on return with the platform specific format of the data
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71 *
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72 * @see Transfer#nativeToJava
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73 */
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74 public void javaToNative (Object object, TransferData transferData){
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75 if (!checkURL(object) || !isSupportedType(transferData)) {
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76 DND.error(DND.ERROR_INVALID_DATA);
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77 }
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78 String url = (cast(ArrayWrapperString)object).array;
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79 NSString nsString = NSString.stringWith(url);
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80 NSString escapedString = nsString.stringByAddingPercentEscapesUsingEncoding(OS.NSUTF8StringEncoding);
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81 transferData.data = NSURL.URLWithString(escapedString);
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82 }
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83
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84 /**
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85 * This implementation of <code>nativeToJava</code> converts a platform
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86 * specific representation of a URL to a java <code>String</code>.
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87 *
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88 * @param transferData the platform specific representation of the data to be converted
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89 * @return a java <code>String</code> containing a URL if the conversion was successful;
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90 * otherwise null
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91 *
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92 * @see Transfer#javaToNative
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93 */
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94 public Object nativeToJava(TransferData transferData){
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95 if (!isSupportedType(transferData) || transferData.data is null) return null;
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96 NSURL nsUrl = cast(NSURL) transferData.data;
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97 NSString nsString = nsUrl.absoluteString();
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98 return new ArrayWrapperString(nsString.getString());
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99 }
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100
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101 protected int[] getTypeIds(){
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102 return [URL_ID];
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103 }
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104
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105 protected String[] getTypeNames(){
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106 return [URL];
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107 }
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108
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109 bool checkURL(Object object) {
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110 return object !is null && (cast(ArrayWrapperString) object) && (cast(ArrayWrapperString) object).array.length() > 0;
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111 }
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112
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113 protected bool validate(Object object) {
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114 return checkURL(object);
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115 }
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116 }