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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.motif.*;
class WidgetTable {
static int FreeSlot = 0;
static int GrowSize = 1024;
static int [] IndexTable = new int [GrowSize];
static Shell [] Shells = new Shell [GrowSize / 8];
static Widget [] WidgetTable = new Widget [GrowSize];
static int [] ArgList = {OS.XmNuserData, 0};
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;
if (OS.XtIsSubclass (handle, OS.ShellWidgetClass ())) {
for (int i=0; i<Shells.length; i++) {
Widget shell = Shells [i];
if ((shell != null) && (shell.topHandle () == handle)) return shell;
}
return null;
}
ArgList [1] = 0;
OS.XtGetValues (handle, ArgList, ArgList.length / 2);
if (ArgList [1] == 0) return null;
int index = ArgList [1] - 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 (OS.XtIsSubclass (handle, OS.ShellWidgetClass ())) {
for (int i=0; i<Shells.length; i++) {
if (Shells [i] == null) {
Shells [i] = (Shell) widget;
return;
}
}
Shell [] newShells = new Shell [Shells.length + GrowSize / 8];
System.arraycopy (Shells, 0, newShells, 0, Shells.length);
newShells [Shells.length] = (Shell) widget;
Shells = newShells;
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;
}
ArgList [1] = FreeSlot + 1;
OS.XtSetValues (handle, ArgList, ArgList.length / 2);
int oldSlot = FreeSlot;
FreeSlot = IndexTable [oldSlot];
IndexTable [oldSlot] = -2;
WidgetTable [oldSlot] = widget;
}
public static synchronized Widget remove (int handle) {
if (handle == 0) return null;
if (OS.XtIsSubclass (handle, OS.ShellWidgetClass ())) {
for (int i=0; i<Shells.length; i++) {
Widget shell = Shells [i];
if ((shell != null) && (shell.topHandle () == handle)) {
Shells [i] = null;
return shell;
}
}
return null;
}
ArgList [1] = 0;
Widget widget = null;
OS.XtGetValues (handle, ArgList, ArgList.length / 2);
int index = ArgList [1] - 1;
if (0 <= index && index < WidgetTable.length) {
widget = WidgetTable [index];
WidgetTable [index] = null;
IndexTable [index] = FreeSlot;
FreeSlot = index;
ArgList [1] = 0;
OS.XtSetValues (handle, ArgList, ArgList.length / 2);
}
return widget;
}
public static synchronized Shell [] shells () {
int length = 0;
for (int i=0; i<Shells.length; i++) {
if (Shells [i] != null) length++;
}
int index = 0;
Shell [] result = new Shell [length];
for (int i=0; i<Shells.length; i++) {
Shell widget = Shells [i];
if (widget != null) result [index++] = widget;
}
return result;
}
public static synchronized int size () {
int length = 0;
for (int i=0; i<Shells.length; i++) {
if (Shells [i] != null) length++;
}
for (int i=0; i<WidgetTable.length; i++) {
if (WidgetTable [i] != null) length++;
}
return length;
}
}
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