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11 package org.eclipse.swt.widgets;
12
13
14 import org.eclipse.swt.internal.photon.*;
15
16 class WidgetTable {
17 static int FreeSlot = 0;
18 static int GrowSize = 1024;
19 static int [] IndexTable = new int [GrowSize];
20 static Widget [] WidgetTable = new Widget [GrowSize];
21 static int ArgPtr = OS.malloc (4);
22 static int [] ArgBuffer = new int [1];
23 static int [] GetArgs = new int [] {OS.Pt_ARG_USER_DATA, 0, 0};
24 static {
25 for (int i=0; i<GrowSize-1; i++) IndexTable [i] = i + 1;
26 IndexTable [GrowSize - 1] = -1;
27 }
28 public static synchronized Widget get (int handle) {
29 if (handle == 0) return null;
30 GetArgs [1] = 0;
31 OS.PtGetResources (handle, GetArgs.length / 3, GetArgs);
32 if (GetArgs [1] == 0) return null;
33 OS.memmove (ArgBuffer, GetArgs [1], 4);
34 if (ArgBuffer [0] == 0) return null;
35 int index = ArgBuffer [0] - 1;
36 if (0 <= index && index < WidgetTable.length) return WidgetTable [index];
37 return null;
38 }
39 public synchronized static void put(int handle, Widget widget) {
40 if (handle == 0) return;
41 if (FreeSlot == -1) {
42 int length = (FreeSlot = IndexTable.length) + GrowSize;
43 int[] newIndexTable = new int[length];
44 Widget[] newWidgetTable = new Widget [length];
45 System.arraycopy (IndexTable, 0, newIndexTable, 0, FreeSlot);
46 System.arraycopy (WidgetTable, 0, newWidgetTable, 0, FreeSlot);
47 for (int i = FreeSlot; i < length - 1; i++) {
48 newIndexTable[i] = i + 1;
49 }
50 newIndexTable[length - 1] = -1;
51 IndexTable = newIndexTable;
52 WidgetTable = newWidgetTable;
53 }
54 ArgBuffer [0] = FreeSlot + 1;
55 OS.memmove (ArgPtr, ArgBuffer, 4);
56 OS.PtSetResource (handle, OS.Pt_ARG_USER_DATA, ArgPtr, 4);
57 int oldSlot = FreeSlot;
58 FreeSlot = IndexTable[oldSlot];
59 IndexTable [oldSlot] = -2;
60 WidgetTable [oldSlot] = widget;
61 }
62 public static synchronized Widget remove (int handle) {
63 if (handle == 0) return null;
64 GetArgs [1] = 0;
65 OS.PtGetResources (handle, GetArgs.length / 3, GetArgs);
66 if (GetArgs [1] == 0) return null;
67 OS.memmove (ArgBuffer, GetArgs [1], 4);
68 if (ArgBuffer [0] == 0) return null;
69 int index = ArgBuffer [0] - 1;
70 Widget widget = null;
71 if (0 <= index && index < WidgetTable.length) {
72 widget = WidgetTable [index];
73 WidgetTable [index] = null;
74 IndexTable [index] = FreeSlot;
75 FreeSlot = index;
76 ArgBuffer [0] = 0;
77 OS.memmove (ArgPtr, ArgBuffer, 4);
78 OS.PtSetResource (handle, OS.Pt_ARG_USER_DATA, ArgPtr, 4);
79 }
80 return widget;
81 }
82 public static synchronized Shell [] shells () {
83 int length = 0;
84 for (int i=0; i<WidgetTable.length; i++) {
85 Widget widget = WidgetTable [i];
86 if (widget != null && widget instanceof Shell) length++;
87 }
88 int index = 0;
89 Shell [] result = new Shell [length];
90 for (int i=0; i<WidgetTable.length; i++) {
91 Widget widget = WidgetTable [i];
92 if (widget != null && widget instanceof Shell) {
93 int j = 0;
94 while (j < index) {
95 if (result [j] == widget) break;
96 j++;
97 }
98 if (j == index) result [index++] = (Shell) widget;
99 }
100 }
101 if (index == length) return result;
102 Shell [] newResult = new Shell [index];
103 System.arraycopy (result, 0, newResult, 0, index);
104 return newResult;
105 }
106 public static synchronized int size () {
107 int size = 0;
108 for (int i=0; i<WidgetTable.length; i++) {
109 if (WidgetTable [i] != null) size++;
110 }
111 return size;
112 }
113 }
114 |
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