25
|
1 /*******************************************************************************
|
|
2 * Copyright (c) 2000, 2008 IBM Corporation and others.
|
|
3 * All rights reserved. This program and the accompanying materials
|
|
4 * are made available under the terms of the Eclipse Public License v1.0
|
|
5 * which accompanies this distribution, and is available at
|
|
6 * http://www.eclipse.org/legal/epl-v10.html
|
|
7 *
|
|
8 * Contributors:
|
|
9 * IBM Corporation - initial API and implementation
|
|
10 * Port to the D programming language:
|
|
11 * Frank Benoit <benoit@tionex.de>
|
|
12 *******************************************************************************/
|
|
13 module org.eclipse.swt.dnd.TextTransfer;
|
|
14
|
|
15 import org.eclipse.swt.internal.Converter;
|
|
16 import org.eclipse.swt.internal.gtk.OS;
|
|
17 import java.lang.all;
|
|
18 import org.eclipse.swt.dnd.ByteArrayTransfer;
|
|
19 import org.eclipse.swt.dnd.TransferData;
|
|
20 import org.eclipse.swt.dnd.DND;
|
|
21
|
|
22
|
|
23 /**
|
|
24 * The class <code>TextTransfer</code> provides a platform specific mechanism
|
|
25 * for converting plain text represented as a java <code>String</code>
|
|
26 * to a platform specific representation of the data and vice versa.
|
|
27 *
|
|
28 * <p>An example of a java <code>String</code> containing plain text is shown
|
|
29 * below:</p>
|
|
30 *
|
|
31 * <code><pre>
|
|
32 * String textData = "Hello World";
|
|
33 * </code></pre>
|
|
34 *
|
|
35 * @see Transfer
|
|
36 */
|
|
37 public class TextTransfer : ByteArrayTransfer {
|
|
38
|
|
39 private static TextTransfer _instance;
|
|
40 private static const String COMPOUND_TEXT = "COMPOUND_TEXT"; //$NON-NLS-1$
|
|
41 private static const String UTF8_STRING = "UTF8_STRING"; //$NON-NLS-1$
|
|
42 private static const String STRING = "STRING"; //$NON-NLS-1$
|
|
43 private static const int COMPOUND_TEXT_ID;
|
|
44 private static const int UTF8_STRING_ID;
|
|
45 private static const int STRING_ID;
|
|
46
|
|
47 static this(){
|
|
48 COMPOUND_TEXT_ID = registerType(COMPOUND_TEXT);
|
|
49 UTF8_STRING_ID = registerType(UTF8_STRING);
|
|
50 STRING_ID = registerType(STRING);
|
|
51 _instance = new TextTransfer();
|
|
52 }
|
|
53
|
|
54 private this() {}
|
|
55
|
|
56 /**
|
|
57 * Returns the singleton instance of the TextTransfer class.
|
|
58 *
|
|
59 * @return the singleton instance of the TextTransfer class
|
|
60 */
|
|
61 public static TextTransfer getInstance () {
|
|
62 return _instance;
|
|
63 }
|
|
64
|
|
65 /**
|
|
66 * This implementation of <code>javaToNative</code> converts plain text
|
|
67 * represented by a java <code>String</code> to a platform specific representation.
|
|
68 *
|
|
69 * @param object a java <code>String</code> containing text
|
|
70 * @param transferData an empty <code>TransferData</code> object that will
|
|
71 * be filled in on return with the platform specific format of the data
|
|
72 *
|
|
73 * @see Transfer#nativeToJava
|
|
74 */
|
|
75 override public void javaToNative (Object object, TransferData transferData) {
|
|
76 transferData.result = 0;
|
|
77 if (!checkText(object) || !isSupportedType(transferData)) {
|
|
78 DND.error(DND.ERROR_INVALID_DATA);
|
|
79 }
|
52
|
80 String string = stringcast(object);
|
25
|
81 char* utf8 = toStringz(string);
|
|
82 if (transferData.type is cast(void*) COMPOUND_TEXT_ID) {
|
|
83 void* encoding;
|
|
84 int format;
|
|
85 char* ctext;
|
|
86 int length;
|
|
87 bool result = cast(bool) OS.gdk_utf8_to_compound_text(utf8, &encoding, &format, &ctext, &length);
|
|
88 if (!result) return;
|
|
89 transferData.type = encoding;
|
|
90 transferData.format = format;
|
|
91 transferData.length = length;
|
|
92 transferData.pValue = ctext;
|
|
93 transferData.result = 1;
|
|
94 }
|
|
95 if (transferData.type is cast(void*)UTF8_STRING_ID) {
|
|
96 char* pValue = cast(char*)OS.g_malloc(string.length+1);
|
|
97 if (pValue is null) return;
|
|
98 pValue[ 0 .. string.length ] = string;
|
|
99 pValue[ string.length ] = '\0';
|
|
100 transferData.type = cast(void*)UTF8_STRING_ID;
|
|
101 transferData.format = 8;
|
|
102 transferData.length = string.length;
|
|
103 transferData.pValue = pValue;
|
|
104 transferData.result = 1;
|
|
105 }
|
|
106 if (transferData.type is cast(void*)STRING_ID) {
|
|
107 auto string_target = OS.gdk_utf8_to_string_target(utf8);
|
|
108 if (string_target is null) return;
|
|
109 transferData.type = cast(void*)STRING_ID;
|
|
110 transferData.format = 8;
|
52
|
111 transferData.length = OS.strlen(string_target);
|
25
|
112 transferData.pValue = string_target;
|
|
113 transferData.result = 1;
|
|
114 }
|
|
115 }
|
|
116
|
|
117 /**
|
|
118 * This implementation of <code>nativeToJava</code> converts a platform specific
|
|
119 * representation of plain text to a java <code>String</code>.
|
|
120 *
|
|
121 * @param transferData the platform specific representation of the data to be converted
|
|
122 * @return a java <code>String</code> containing text if the conversion was successful; otherwise null
|
|
123 *
|
|
124 * @see Transfer#javaToNative
|
|
125 */
|
|
126 override public Object nativeToJava(TransferData transferData){
|
|
127 if (!isSupportedType(transferData) || transferData.pValue is null) return null;
|
|
128 char** list;
|
|
129 int count = OS.gdk_text_property_to_utf8_list(transferData.type, transferData.format, transferData.pValue, transferData.length, &list);
|
|
130 if (count is 0) return null;
|
52
|
131 String utf8 = fromStringz( list[0] )._idup();
|
25
|
132 OS.g_strfreev(list);
|
|
133 return new ArrayWrapperString( utf8 );
|
|
134 }
|
|
135
|
|
136 override protected int[] getTypeIds() {
|
|
137 return [UTF8_STRING_ID, COMPOUND_TEXT_ID, STRING_ID];
|
|
138 }
|
|
139
|
|
140 override protected String[] getTypeNames() {
|
|
141 return [UTF8_STRING, COMPOUND_TEXT, STRING];
|
|
142 }
|
|
143
|
|
144 bool checkText(Object object) {
|
|
145 if( object is null ) return false;
|
|
146 ArrayWrapperString astr = cast(ArrayWrapperString)object;
|
|
147 if( astr is null ) return false;
|
|
148 return astr.array.length > 0;
|
|
149 }
|
|
150
|
|
151 protected override bool validate(Object object) {
|
|
152 return checkText(object);
|
|
153 }
|
|
154 }
|