1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Mozilla browser.
*
* The Initial Developer of the Original Code is Netscape
* Communications, Inc. Portions created by Netscape are
* Copyright (C) 1999, Mozilla. All Rights Reserved.
*
* Author:
* Simon Fraser <sfraser@netscape.com>
*/
#include "nsDocShellEnumerator.h"
#include "nsIDocShellTreeNode.h"
nsDocShellEnumerator::nsDocShellEnumerator(PRInt32 inEnumerationDirection)
: mRootItem(nsnull)
, mItemArray(nsnull)
, mCurIndex(0)
, mDocShellType(nsIDocShellTreeItem::typeAll)
, mEnumerationDirection(inEnumerationDirection)
{
}
nsDocShellEnumerator::~nsDocShellEnumerator()
{
delete mItemArray;
}
NS_IMPL_ISUPPORTS1(nsDocShellEnumerator, nsISimpleEnumerator)
/* nsISupports getNext (); */
NS_IMETHODIMP nsDocShellEnumerator::GetNext(nsISupports **outCurItem)
{
NS_ENSURE_ARG_POINTER(outCurItem);
*outCurItem = nsnull;
nsresult rv = EnsureDocShellArray();
if (NS_FAILED(rv)) return rv;
if (mCurIndex >= 0 && mCurIndex < mItemArray->Count())
{
nsIDocShellTreeItem* thisItem = NS_REINTERPRET_CAST(nsIDocShellTreeItem*, mItemArray->ElementAt(mCurIndex));
rv = thisItem->QueryInterface(NS_GET_IID(nsISupports), (void **)outCurItem);
if (NS_FAILED(rv)) return rv;
}
else
return NS_ERROR_FAILURE;
mCurIndex ++;
return NS_OK;
}
/* boolean hasMoreElements (); */
NS_IMETHODIMP nsDocShellEnumerator::HasMoreElements(PRBool *outHasMore)
{
NS_ENSURE_ARG_POINTER(outHasMore);
*outHasMore = PR_FALSE;
nsresult rv = EnsureDocShellArray();
if (NS_FAILED(rv)) return rv;
*outHasMore = (mCurIndex < mItemArray->Count());
return NS_OK;
}
nsresult nsDocShellEnumerator::GetEnumerationRootItem(nsIDocShellTreeItem * *aEnumerationRootItem)
{
NS_ENSURE_ARG_POINTER(aEnumerationRootItem);
*aEnumerationRootItem = mRootItem;
NS_IF_ADDREF(*aEnumerationRootItem);
return NS_OK;
}
nsresult nsDocShellEnumerator::SetEnumerationRootItem(nsIDocShellTreeItem * aEnumerationRootItem)
{
mRootItem = aEnumerationRootItem;
ClearState();
return NS_OK;
}
nsresult nsDocShellEnumerator::GetEnumDocShellType(PRInt32 *aEnumerationItemType)
{
NS_ENSURE_ARG_POINTER(aEnumerationItemType);
*aEnumerationItemType = mDocShellType;
return NS_OK;
}
nsresult nsDocShellEnumerator::SetEnumDocShellType(PRInt32 aEnumerationItemType)
{
mDocShellType = aEnumerationItemType;
ClearState();
return NS_OK;
}
nsresult nsDocShellEnumerator::First()
{
mCurIndex = 0;
return EnsureDocShellArray();
}
nsresult nsDocShellEnumerator::EnsureDocShellArray()
{
if (!mItemArray)
{
mItemArray = new nsVoidArray;
if (!mItemArray) return NS_ERROR_OUT_OF_MEMORY;
return BuildDocShellArray(*mItemArray);
}
return NS_OK;
}
nsresult nsDocShellEnumerator::ClearState()
{
delete mItemArray;
mItemArray = nsnull;
mCurIndex = 0;
return NS_OK;
}
nsresult nsDocShellEnumerator::BuildDocShellArray(nsVoidArray& inItemArray)
{
NS_ENSURE_TRUE(mRootItem, NS_ERROR_NOT_INITIALIZED);
inItemArray.Clear();
return BuildArrayRecursive(mRootItem, inItemArray);
}
nsresult nsDocShellForwardsEnumerator::BuildArrayRecursive(nsIDocShellTreeItem* inItem, nsVoidArray& inItemArray)
{
nsresult rv;
nsCOMPtr<nsIDocShellTreeNode> itemAsNode = do_QueryInterface(inItem, &rv);
if (NS_FAILED(rv)) return rv;
PRInt32 itemType;
// add this item to the array
if ((mDocShellType == nsIDocShellTreeItem::typeAll) ||
(NS_SUCCEEDED(inItem->GetItemType(&itemType)) && (itemType == mDocShellType)))
{
rv = inItemArray.AppendElement((void *)inItem);
if (NS_FAILED(rv)) return rv;
}
PRInt32 numChildren;
rv = itemAsNode->GetChildCount(&numChildren);
if (NS_FAILED(rv)) return rv;
for (PRInt32 i = 0; i < numChildren; ++i)
{
nsCOMPtr<nsIDocShellTreeItem> curChild;
rv = itemAsNode->GetChildAt(i, getter_AddRefs(curChild));
if (NS_FAILED(rv)) return rv;
rv = BuildArrayRecursive(curChild, inItemArray);
if (NS_FAILED(rv)) return rv;
}
return NS_OK;
}
nsresult nsDocShellBackwardsEnumerator::BuildArrayRecursive(nsIDocShellTreeItem* inItem, nsVoidArray& inItemArray)
{
nsresult rv;
nsCOMPtr<nsIDocShellTreeNode> itemAsNode = do_QueryInterface(inItem, &rv);
if (NS_FAILED(rv)) return rv;
PRInt32 numChildren;
rv = itemAsNode->GetChildCount(&numChildren);
if (NS_FAILED(rv)) return rv;
for (PRInt32 i = numChildren - 1; i >= 0; --i)
{
nsCOMPtr<nsIDocShellTreeItem> curChild;
rv = itemAsNode->GetChildAt(i, getter_AddRefs(curChild));
if (NS_FAILED(rv)) return rv;
rv = BuildArrayRecursive(curChild, inItemArray);
if (NS_FAILED(rv)) return rv;
}
PRInt32 itemType;
// add this item to the array
if ((mDocShellType == nsIDocShellTreeItem::typeAll) ||
(NS_SUCCEEDED(inItem->GetItemType(&itemType)) && (itemType == mDocShellType)))
{
rv = inItemArray.AppendElement((void *)inItem);
if (NS_FAILED(rv)) return rv;
}
return NS_OK;
}
|
