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comparison dwt/dnd/TextTransfer.d @ 45:d8635bb48c7c

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Merge with SWT 3.5
author Jacob Carlborg <doob@me.com>
date Mon, 01 Dec 2008 17:07:00 +0100
parents e76aa0b07480
children 2fb76eb49f04
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44:ca5e494f2bbf 45:d8635bb48c7c
1 /******************************************************************************* 1 /*******************************************************************************
2 * Copyright (c) 2000, 2007 IBM Corporation and others. 2 * Copyright (c) 2000, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials 3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0 4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at 5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html 6 * http://www.eclipse.org/legal/epl-v10.html
7 * 7 *
8 * Contributors: 8 * Contributors:
9 * IBM Corporation - initial API and implementation 9 * IBM Corporation - initial API and implementation
10 *******************************************************************************/ 10 *******************************************************************************/
11 module dwt.dnd; 11 module dwt.dnd.TextTransfer;
12 12
13 import dwt.internal.carbon.CFRange; 13 import dwt.dwthelper.utils;
14 import dwt.internal.carbon.OS; 14
15 import dwt.internal.cocoa.NSString;
16 import dwt.internal.cocoa.OS;
15 17
16 /** 18 /**
17 * The class <code>TextTransfer</code> provides a platform specific mechanism 19 * The class <code>TextTransfer</code> provides a platform specific mechanism
18 * for converting plain text represented as a java <code>String</code> 20 * for converting plain text represented as a java <code>String</code>
19 * to a platform specific representation of the data and vice versa. 21 * to a platform specific representation of the data and vice versa.
25 * String textData = "Hello World"; 27 * String textData = "Hello World";
26 * </code></pre> 28 * </code></pre>
27 * 29 *
28 * @see Transfer 30 * @see Transfer
29 */ 31 */
30 public class TextTransfer : ByteArrayTransfer { 32 public class TextTransfer extends ByteArrayTransfer {
31 33
32 static TextTransfer _instance = new TextTransfer(); 34 static TextTransfer _instance = new TextTransfer();
33 static final String TEXT = "TEXT"; //$NON-NLS-1$ 35
34 static final String UTEXT = "utxt"; //$NON-NLS-1$ 36 static final String ID_NAME = OS.NSStringPboardType.getString();
35 static final int TEXTID = OS.kScrapFlavorTypeText; 37 static final int ID = registerType(ID_NAME);
36 static final int UTEXTID = OS.kScrapFlavorTypeUnicode;
37 38
38 this() {} 39 TextTransfer() {}
39 40
40 /** 41 /**
41 * Returns the singleton instance of the TextTransfer class. 42 * Returns the singleton instance of the TextTransfer class.
42 * 43 *
43 * @return the singleton instance of the TextTransfer class 44 * @return the singleton instance of the TextTransfer class
49 /** 50 /**
50 * This implementation of <code>javaToNative</code> converts plain text 51 * This implementation of <code>javaToNative</code> converts plain text
51 * represented by a java <code>String</code> to a platform specific representation. 52 * represented by a java <code>String</code> to a platform specific representation.
52 * 53 *
53 * @param object a java <code>String</code> containing text 54 * @param object a java <code>String</code> containing text
54 * @param transferData an empty <code>TransferData</code> object; this object 55 * @param transferData an empty <code>TransferData</code> object that will
55 * will be filled in on return with the platform specific format of the data 56 * be filled in on return with the platform specific format of the data
56 * 57 *
57 * @see Transfer#javaToNative 58 * @see Transfer#nativeToJava
58 */ 59 */
59 public void javaToNative (Object object, TransferData transferData) { 60 public void javaToNative (Object object, TransferData transferData) {
60 if (!checkText(object) || !isSupportedType(transferData)) { 61 if (!checkText(object) || !isSupportedType(transferData)) {
61 DND.error(DND.ERROR_INVALID_DATA); 62 DND.error(DND.ERROR_INVALID_DATA);
62 } 63 }
63 String String = cast(String)object; 64 transferData.data = NSString.stringWith((String) object);
64 char[] chars = new char[String.length()];
65 String.getChars (0, chars.length, chars, 0);
66 transferData.result = -1;
67 switch (transferData.type) {
68 case TEXTID: {
69 int cfString = OS.CFStringCreateWithCharacters(OS.kCFAllocatorDefault, chars, chars.length);
70 if (cfString is 0) return;
71 byte[] buffer = null;
72 try {
73 CFRange range = new CFRange();
74 range.length = chars.length;
75 int encoding = OS.CFStringGetSystemEncoding();
76 int[] size = new int[1];
77 int numChars = OS.CFStringGetBytes(cfString, range, encoding, cast(byte)'?', true, null, 0, size);
78 if (numChars is 0) return;
79 buffer = new byte[size[0]];
80 numChars = OS.CFStringGetBytes(cfString, range, encoding, cast(byte)'?', true, buffer, size [0], size);
81 if (numChars is 0) return;
82 } finally {
83 OS.CFRelease(cfString);
84 }
85 transferData.data = new byte[1][];
86 transferData.data[0] = buffer;
87 transferData.result = OS.noErr;
88 break;
89 }
90 case UTEXTID: {
91 byte[] buffer = new byte[chars.length * 2];
92 OS.memmove(buffer, chars, buffer.length);
93 transferData.data = new byte[1][];
94 transferData.data[0] = buffer;
95 transferData.result = OS.noErr;
96 break;
97 }
98 }
99 } 65 }
100 66
101 /** 67 /**
102 * This implementation of <code>nativeToJava</code> converts a platform specific 68 * This implementation of <code>nativeToJava</code> converts a platform specific
103 * representation of plain text to a java <code>String</code>. 69 * representation of plain text to a java <code>String</code>.
104 * 70 *
105 * @param transferData the platform specific representation of the data to be converted 71 * @param transferData the platform specific representation of the data to be converted
106 * @return a java <code>String</code> containing text if the conversion was successful; otherwise null 72 * @return a java <code>String</code> containing text if the conversion was successful; otherwise null
107 * 73 *
108 * @see Transfer#nativeToJava 74 * @see Transfer#javaToNative
109 */ 75 */
110 public Object nativeToJava(TransferData transferData){ 76 public Object nativeToJava(TransferData transferData){
111 if (!isSupportedType(transferData) || transferData.data is null) return null; 77 if (!isSupportedType(transferData) || transferData.data is null) return null;
112 if (transferData.data.length is 0 || transferData.data[0].length is 0) return null; 78 NSString string = (NSString) transferData.data;
113 byte[] buffer = transferData.data[0]; 79 return string.getString();
114 switch (transferData.type) {
115 case TEXTID: {
116 int encoding = OS.CFStringGetSystemEncoding();
117 int cfString = OS.CFStringCreateWithBytes(OS.kCFAllocatorDefault, buffer, buffer.length, encoding, true);
118 if (cfString is 0) return null;
119 try {
120 int length = OS.CFStringGetLength(cfString);
121 if (length is 0) return null;
122 char[] chars = new char[length];
123 CFRange range = new CFRange();
124 range.length = length;
125 OS.CFStringGetCharacters(cfString, range, chars);
126 return new String(chars);
127 } finally {
128 OS.CFRelease(cfString);
129 }
130 }
131 case UTEXTID: {
132 char[] chars = new char[(buffer.length + 1) / 2];
133 OS.memmove(chars, buffer, buffer.length);
134 return new String(chars);
135 }
136 }
137 return null;
138 } 80 }
139 81
140 protected int[] getTypeIds() { 82 protected int[] getTypeIds() {
141 return new int[] {UTEXTID, TEXTID}; 83 return new int[] {ID};
142 } 84 }
143 85
144 protected String[] getTypeNames() { 86 protected String[] getTypeNames() {
145 return new String[] {UTEXT, TEXT}; 87 return new String[] {ID_NAME};
146 } 88 }
147 89
148 bool checkText(Object object) { 90 bool checkText(Object object) {
149 return (object !is null && null !is cast(String)object && (cast(String)object).length() > 0); 91 return (object !is null && object instanceof String && ((String)object).length() > 0);
150 } 92 }
151 protected bool validate(Object object) { 93 protected bool validate(Object object) {
152 return checkText(object); 94 return checkText(object);
153 } 95 }
154 } 96 }