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package org.eclipse.swt.widgets;
/*
* Copyright (c) 2000, 2002 IBM Corp. All rights reserved.
* This file is made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*/
import org.eclipse.swt.internal.carbon.OS;
public class WidgetTable {
static int FreeSlot = 0;
static int GrowSize = 1024;
static int [] IndexTable = new int [GrowSize];
static Widget [] WidgetTable = new Widget [GrowSize];
static {
for (int i=0; i<GrowSize-1; i++) IndexTable [i] = i + 1;
IndexTable [GrowSize - 1] = -1;
}
public static synchronized Widget get (int handle) {
if (handle == 0) return null;
int index = getUserData(handle) - 1;
if (0 <= index && index < WidgetTable.length) return WidgetTable [index];
return null;
}
public synchronized static void put (int handle, Widget widget) {
if (handle == 0) return;
if (FreeSlot == -1) {
int length = (FreeSlot = IndexTable.length) + GrowSize;
int [] newIndexTable = new int [length];
Widget [] newWidgetTable = new Widget [length];
System.arraycopy (IndexTable, 0, newIndexTable, 0, FreeSlot);
System.arraycopy (WidgetTable, 0, newWidgetTable, 0, FreeSlot);
for (int i=FreeSlot; i<length-1; i++) {
newIndexTable [i] = i + 1;
}
newIndexTable [length - 1] = -1;
IndexTable = newIndexTable;
WidgetTable = newWidgetTable;
}
setUserData(handle, FreeSlot + 1);
int oldSlot = FreeSlot;
FreeSlot = IndexTable [oldSlot];
IndexTable [oldSlot] = -2;
WidgetTable [oldSlot] = widget;
}
public static synchronized Widget remove (int handle) {
if (handle == 0) return null;
Widget widget = null;
int index= getUserData(handle) - 1;
if (0 <= index && index < WidgetTable.length) {
widget = WidgetTable [index];
WidgetTable [index] = null;
IndexTable [index] = FreeSlot;
FreeSlot = index;
setUserData(handle, 0);
}
return widget;
}
public static synchronized Shell [] shells () {
int size= 0;
for (int i= 0; i < WidgetTable.length; i++)
if (WidgetTable[i] instanceof Shell)
size++;
int index= 0;
Shell[] result= new Shell[size];
for (int i= 0; i < WidgetTable.length; i++) {
Widget widget= WidgetTable[i];
if (widget instanceof Shell)
result [index++]= (Shell) widget;
}
return result;
}
public static synchronized int size () {
int length = 0;
for (int i=0; i<WidgetTable.length; i++) {
if (WidgetTable [i] != null) length++;
}
return length;
}
/////////////////////////////////////////////////
// Mac stuff
/////////////////////////////////////////////////
private static int getUserData(int handle) {
if (OS.IsValidControlHandle(handle))
return OS.GetControlReference(handle);
if (OS.IsValidMenu(handle)) {
int[] refCon= new int[1];
OS.GetMenuItemRefCon(handle, (short)0, refCon);
//System.out.println("refCon: " + refCon[0]);
return refCon[0];
}
if (OS.IsValidWindowPtr(handle))
return OS.GetWRefCon(handle);
//System.out.println("WidgetTable.getUserData: unknown handle type");
return -1;
}
private static void setUserData(int handle, int data) {
if (OS.IsValidControlHandle(handle)) {
OS.SetControlReference(handle, data);
return;
}
if (OS.IsValidMenu(handle)) {
OS.SetMenuItemRefCon(handle, (short)0, data);
return;
}
if (OS.IsValidWindowPtr(handle)) {
OS.SetWRefCon(handle, data);
return;
}
System.out.println("WidgetTable.setUserData: unknown handle type: " + handle);
}
}
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