Mercurial > projects > dwt-linux
annotate dwt/dnd/TextTransfer.d @ 255:5a30aa9820f3
removed tango.stdc.stringz imports and allow null for arrays and string arguments.
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sun, 15 Jun 2008 22:32:20 +0200 |
| parents | 380bad9f6852 |
| children | c0d810de7093 |
| rev | line source |
|---|---|
|
152
17f8449522fd
overloads second walkthrough
Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
1 /******************************************************************************* |
| 92 | 2 * Copyright (c) 2000, 2006 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 | |
| 108 | 10 * Port to the D programming language: |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 92 | 12 *******************************************************************************/ |
| 13 module dwt.dnd.TextTransfer; | |
| 14 | |
| 15 import dwt.internal.Converter; | |
| 16 import dwt.internal.gtk.OS; | |
| 17 import dwt.dwthelper.utils; | |
| 18 import dwt.dnd.ByteArrayTransfer; | |
| 19 import dwt.dnd.TransferData; | |
| 20 import dwt.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; | |
| 238 | 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"; //$NON-NLS-1$ | |
| 92 | 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; this object | |
| 71 * will be filled in on return with the platform specific format of the data | |
| 72 * | |
| 73 * @see Transfer#javaToNative | |
| 74 */ | |
|
152
17f8449522fd
overloads second walkthrough
Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
75 override public void javaToNative (Object object, TransferData transferData) { |
| 92 | 76 transferData.result = 0; |
| 77 if (!checkText(object) || !isSupportedType(transferData)) { | |
| 78 DND.error(DND.ERROR_INVALID_DATA); | |
| 79 } | |
| 238 | 80 String string = (cast(ArrayWrapperString)object).array; |
|
255
5a30aa9820f3
removed tango.stdc.stringz imports and allow null for arrays and string arguments.
Frank Benoit <benoit@tionex.de>
parents:
238
diff
changeset
|
81 char* utf8 = toStringz(string); |
| 92 | 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; | |
| 111 transferData.length = tango.stdc.string.strlen(string_target); | |
| 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#nativeToJava | |
| 125 */ | |
|
152
17f8449522fd
overloads second walkthrough
Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
126 override public Object nativeToJava(TransferData transferData){ |
| 92 | 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; | |
|
255
5a30aa9820f3
removed tango.stdc.stringz imports and allow null for arrays and string arguments.
Frank Benoit <benoit@tionex.de>
parents:
238
diff
changeset
|
131 String utf8 = fromStringz( list[0] ).dup; |
| 92 | 132 OS.g_strfreev(list); |
| 133 return new ArrayWrapperString( utf8 ); | |
| 134 } | |
| 135 | |
|
152
17f8449522fd
overloads second walkthrough
Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
136 override protected int[] getTypeIds() { |
| 92 | 137 return [UTF8_STRING_ID, COMPOUND_TEXT_ID, STRING_ID]; |
| 138 } | |
| 139 | |
| 238 | 140 override protected String[] getTypeNames() { |
| 92 | 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 | |
|
152
17f8449522fd
overloads second walkthrough
Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
151 protected override bool validate(Object object) { |
| 92 | 152 return checkText(object); |
| 153 } | |
| 154 } |