Mercurial > projects > dwt2
annotate org.eclipse.swt.gtk.linux.x86/src/org/eclipse/swt/widgets/EventTable.d @ 49:7a2dd761a8b2
more work until dmd 2.026 linux segfaults.
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Fri, 27 Mar 2009 12:59:54 +0100 |
| parents | f713da8bc051 |
| children |
| rev | line source |
|---|---|
| 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.widgets.EventTable; | |
| 14 | |
| 15 import java.lang.all; | |
| 16 | |
| 17 import org.eclipse.swt.widgets.Listener; | |
| 18 import org.eclipse.swt.widgets.Event; | |
| 19 import org.eclipse.swt.widgets.Listener; | |
| 20 import org.eclipse.swt.widgets.TypedListener; | |
| 21 import org.eclipse.swt.internal.SWTEventListener; | |
| 22 import org.eclipse.swt.SWT; | |
| 23 import org.eclipse.swt.internal.SWTEventListener; | |
| 24 | |
| 25 /** | |
| 26 * Instances of this class implement a simple | |
| 27 * look up mechanism that maps an event type | |
| 28 * to a listener. Multiple listeners for the | |
| 29 * same event type are supported. | |
| 30 */ | |
| 31 | |
| 32 class EventTable { | |
| 33 int [] types; | |
| 34 Listener [] listeners; | |
| 35 int level; | |
|
49
7a2dd761a8b2
more work until dmd 2.026 linux segfaults.
Frank Benoit <benoit@tionex.de>
parents:
25
diff
changeset
|
36 static const int GROW_SIZE = 4; |
| 25 | 37 |
| 38 public Listener [] getListeners (int eventType) { | |
| 39 if (types is null) return new Listener [0]; | |
| 40 int count = 0; | |
| 41 for (int i=0; i<types.length; i++) { | |
| 42 if (types [i] is eventType) count++; | |
| 43 } | |
| 44 if (count is 0) return new Listener [0]; | |
| 45 Listener [] result = new Listener [count]; | |
| 46 count = 0; | |
| 47 for (int i=0; i<types.length; i++) { | |
| 48 if (types [i] is eventType) { | |
| 49 result [count++] = listeners [i]; | |
| 50 } | |
| 51 } | |
| 52 return result; | |
| 53 } | |
| 54 | |
| 55 public void hook (int eventType, Listener listener) { | |
| 56 if (types is null) types = new int [GROW_SIZE]; | |
| 57 if (listeners is null) listeners = new Listener [GROW_SIZE]; | |
| 58 int length = types.length, index = length - 1; | |
| 59 while (index >= 0) { | |
| 60 if (types [index] !is 0) break; | |
| 61 --index; | |
| 62 } | |
| 63 index++; | |
| 64 if (index is length) { | |
| 65 int [] newTypes = new int [length + GROW_SIZE]; | |
| 66 System.arraycopy (types, 0, newTypes, 0, length); | |
| 67 types = newTypes; | |
| 68 Listener [] newListeners = new Listener [length + GROW_SIZE]; | |
| 69 SimpleType!(Listener).arraycopy (listeners, 0, newListeners, 0, length); | |
| 70 listeners = newListeners; | |
| 71 } | |
| 72 types [index] = eventType; | |
| 73 listeners [index] = listener; | |
| 74 } | |
| 75 | |
| 76 public bool hooks (int eventType) { | |
| 77 if (types is null) return false; | |
| 78 for (int i=0; i<types.length; i++) { | |
| 79 if (types [i] is eventType) return true; | |
| 80 } | |
| 81 return false; | |
| 82 } | |
| 83 | |
| 84 public void sendEvent (Event event) { | |
| 85 if (types is null) return; | |
| 86 level += level >= 0 ? 1 : -1; | |
| 87 try { | |
| 88 for (int i=0; i<types.length; i++) { | |
| 89 if (event.type is SWT.None) return; | |
| 90 if (types [i] is event.type) { | |
| 91 Listener listener = listeners [i]; | |
| 92 if (listener !is null) listener.handleEvent (event); | |
| 93 } | |
| 94 } | |
| 95 } finally { | |
| 96 bool compact = level < 0; | |
| 97 level -= level >= 0 ? 1 : -1; | |
| 98 if (compact && level is 0) { | |
| 99 int index = 0; | |
| 100 for (int i=0; i<types.length; i++) { | |
| 101 if (types [i] !is 0) { | |
| 102 types [index] = types [i]; | |
| 103 listeners [index] = listeners [i]; | |
| 104 index++; | |
| 105 } | |
| 106 } | |
| 107 for (int i=index; i<types.length; i++) { | |
| 108 types [i] = 0; | |
| 109 listeners [i] = null; | |
| 110 } | |
| 111 } | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 public int size () { | |
| 116 if (types is null) return 0; | |
| 117 int count = 0; | |
| 118 for (int i=0; i<types.length; i++) { | |
| 119 if (types [i] !is 0) count++; | |
| 120 } | |
| 121 return count; | |
| 122 } | |
| 123 | |
| 124 void remove (int index) { | |
| 125 if (level is 0) { | |
| 126 int end = types.length - 1; | |
| 127 System.arraycopy (types, index + 1, types, index, end - index); | |
| 128 SimpleType!(Listener).arraycopy (listeners, index + 1, listeners, index, end - index); | |
| 129 index = end; | |
| 130 } else { | |
| 131 if (level > 0) level = -level; | |
| 132 } | |
| 133 types [index] = 0; | |
| 134 listeners [index] = null; | |
| 135 } | |
| 136 | |
| 137 public void unhook (int eventType, Listener listener) { | |
| 138 if (types is null) return; | |
| 139 for (int i=0; i<types.length; i++) { | |
| 140 if (types [i] is eventType && listeners [i] is listener) { | |
| 141 remove (i); | |
| 142 return; | |
| 143 } | |
| 144 } | |
| 145 } | |
| 146 | |
| 147 public void unhook (int eventType, SWTEventListener listener) { | |
| 148 if (types is null) return; | |
| 149 for (int i=0; i<types.length; i++) { | |
| 150 if (types [i] is eventType) { | |
| 151 if ( auto typedListener = cast(TypedListener) listeners [i] ) { | |
| 152 if (typedListener.getEventListener () is listener) { | |
| 153 remove (i); | |
| 154 return; | |
| 155 } | |
| 156 } | |
| 157 } | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 } |