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comparison dwt/browser/SimpleEnumerator.d @ 0:380af2bdd8e5

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author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sat, 09 Aug 2008 17:00:02 +0200
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children 1a8b3cb347e0
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-1:000000000000 0:380af2bdd8e5
1 /*******************************************************************************
2 * Copyright (c) 2003, 2007 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 *******************************************************************************/
11 module dwt.browser.SimpleEnumerator;
12
13 import dwt.dwthelper.utils;
14
15 import dwt.internal.C;
16 import dwt.internal.mozilla.XPCOM;
17 import dwt.internal.mozilla.XPCOMObject;
18 import dwt.internal.mozilla.nsID;
19 import dwt.internal.mozilla.nsISimpleEnumerator;
20 import dwt.internal.mozilla.nsISupports;
21
22 class SimpleEnumerator {
23 XPCOMObject supports;
24 XPCOMObject simpleEnumerator;
25 int refCount = 0;
26 nsISupports[] values;
27 int index = 0;
28
29 SimpleEnumerator (nsISupports[] values) {
30 this.values = values;
31 for (int i = 0; i < values.length; i++) {
32 values[i].AddRef ();
33 }
34 createCOMInterfaces ();
35 }
36
37 int AddRef () {
38 refCount++;
39 return refCount;
40 }
41
42 void createCOMInterfaces () {
43 /* Create each of the interfaces that this object implements */
44 supports = new XPCOMObject (new int[] {2, 0, 0}) {
45 public int /*long*/ method0 (int /*long*/[] args) {return QueryInterface (args[0], args[1]);}
46 public int /*long*/ method1 (int /*long*/[] args) {return AddRef ();}
47 public int /*long*/ method2 (int /*long*/[] args) {return Release ();}
48 };
49
50 simpleEnumerator = new XPCOMObject (new int[] {2, 0, 0, 1, 1}) {
51 public int /*long*/ method0 (int /*long*/[] args) {return QueryInterface (args[0], args[1]);}
52 public int /*long*/ method1 (int /*long*/[] args) {return AddRef ();}
53 public int /*long*/ method2 (int /*long*/[] args) {return Release ();}
54 public int /*long*/ method3 (int /*long*/[] args) {return HasMoreElements (args[0]);}
55 public int /*long*/ method4 (int /*long*/[] args) {return GetNext (args[0]);}
56 };
57 }
58
59 void disposeCOMInterfaces () {
60 if (supports !is null) {
61 supports.dispose ();
62 supports = null;
63 }
64 if (simpleEnumerator !is null) {
65 simpleEnumerator.dispose ();
66 simpleEnumerator = null;
67 }
68 if (values !is null) {
69 for (int i = 0; i < values.length; i++) {
70 values[i].Release ();
71 }
72 values = null;
73 }
74 }
75
76 int /*long*/ getAddress () {
77 return simpleEnumerator.getAddress ();
78 }
79
80 int QueryInterface (int /*long*/ riid, int /*long*/ ppvObject) {
81 if (riid is 0 || ppvObject is 0) return XPCOM.NS_ERROR_NO_INTERFACE;
82 nsID guid = new nsID ();
83 XPCOM.memmove (guid, riid, nsID.sizeof);
84
85 if (guid.Equals (nsISupports.NS_ISUPPORTS_IID)) {
86 XPCOM.memmove (ppvObject, new int /*long*/[] {supports.getAddress ()}, C.PTR_SIZEOF);
87 AddRef ();
88 return XPCOM.NS_OK;
89 }
90 if (guid.Equals (nsISimpleEnumerator.NS_ISIMPLEENUMERATOR_IID)) {
91 XPCOM.memmove (ppvObject, new int /*long*/[] {simpleEnumerator.getAddress ()}, C.PTR_SIZEOF);
92 AddRef ();
93 return XPCOM.NS_OK;
94 }
95
96 XPCOM.memmove (ppvObject, new int /*long*/[] {0}, C.PTR_SIZEOF);
97 return XPCOM.NS_ERROR_NO_INTERFACE;
98 }
99
100 int Release () {
101 refCount--;
102 if (refCount is 0) disposeCOMInterfaces ();
103 return refCount;
104 }
105
106 int HasMoreElements (int /*long*/ _retval) {
107 bool more = values !is null && index < values.length;
108 XPCOM.memmove (_retval, new int[] {more ? 1 : 0}, 4); /*PRBool */
109 return XPCOM.NS_OK;
110 }
111
112 int GetNext (int /*long*/ _retval) {
113 if (values is null || index is values.length) return XPCOM.NS_ERROR_UNEXPECTED;
114 nsISupports value = values[index++];
115 value.AddRef ();
116 XPCOM.memmove (_retval, new int /*long*/[] {value.getAddress ()}, C.PTR_SIZEOF);
117 return XPCOM.NS_OK;
118 }
119 }
120