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
|
/*
Copyright (C) 2000-2005 SKYRIX Software AG
This file is part of SOPE.
SOPE is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
SOPE is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with SOPE; see the file COPYING. If not, write to the
Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/
#include <DOM/DOMNode.h>
#include "common.h"
@implementation NGDOMNodeWithChildren
- (void)dealloc {
[self->childNodes makeObjectsPerformSelector:
@selector(_domNodeForgetParentNode:)
withObject:nil];
[self->childNodes release];
[super dealloc];
}
- (void)_ensureChildNodes {
if (self->childNodes == nil)
self->childNodes = [[NSMutableArray alloc] init];
}
- (BOOL)_isValidChildNode:(id)_node {
return YES;
}
/* navigation */
- (id<NSObject,DOMNodeList>)childNodes {
[self _ensureChildNodes];
/* casting NSMutableArray to DOMNodeList */
return (id<NSObject,DOMNodeList>)self->childNodes;
}
- (BOOL)hasChildNodes {
return [self->childNodes count] > 0 ? YES : NO;
}
- (id<NSObject,DOMNode>)firstChild {
return [self->childNodes count] > 0
? [self->childNodes objectAtIndex:0]
: nil;
}
- (id<NSObject,DOMNode>)lastChild {
NSUInteger count;
return (count = [self->childNodes count]) > 0
? [self->childNodes objectAtIndex:(count - 1)]
: nil;
}
/* modification */
- (id<NSObject,DOMNode>)removeChild:(id<NSObject,DOMNode>)_node {
NSUInteger idx;
if (self->childNodes == nil)
/* this node has no childnodes ! */
return nil;
if ((idx = [self->childNodes indexOfObject:_node]) == NSNotFound)
/* given node is not a child of this node ! */
return nil;
[[_node retain] autorelease];
[self->childNodes removeObjectAtIndex:idx];
[(id)_node _domNodeForgetParentNode:self];
return _node;
}
- (id<NSObject,DOMNode>)appendChild:(id<NSObject,DOMNode>)_node {
if (_node == nil)
/* adding a 'nil' node ?? */
return nil;
if ([_node nodeType] == DOM_DOCUMENT_FRAGMENT_NODE) {
id fragNodes;
NSUInteger i, count;
NSMutableArray *cache;
fragNodes = [_node childNodes];
if ((count = [fragNodes count]) == 0)
/* no nodes to add */
return nil;
/*
copy to cache, since 'childNodes' result is 'live' and
appendChild modifies the tree
*/
cache = [NSMutableArray arrayWithCapacity:count];
for (i = 0; i < count; i++)
[cache addObject:[fragNodes objectAtIndex:i]];
/* append nodes (in reverse order [array implementation is assumed]) .. */
for (i = count = [cache count]; i > 0; i--)
[self appendChild:[cache objectAtIndex:(i - 1)]];
}
else {
id oldParent;
if ((oldParent = [_node parentNode]))
[oldParent removeChild:_node];
[self _ensureChildNodes];
[self->childNodes addObject:_node];
[(id)_node _domNodeRegisterParentNode:self];
}
/* return the node 'added' */
return _node;
}
/* sibling navigation */
- (id)_domNodeBeforeNode:(id)_node {
NSUInteger idx;
if ((idx = [self->childNodes indexOfObject:_node]) == NSNotFound)
/* given node isn't a child of this node */
return nil;
if (idx == 0)
/* given node is the first child */
return nil;
return [self->childNodes objectAtIndex:(idx - 1)];
}
- (id)_domNodeAfterNode:(id)_node {
NSUInteger idx, count;
if ((count = [self->childNodes count]) == 0)
/* this node has no children at all .. */
return nil;
if ((idx = [self->childNodes indexOfObject:_node]) == NSNotFound)
/* given node isn't a child of this node */
return nil;
if (idx == (count - 1))
/* given node is the last child */
return nil;
return [self->childNodes objectAtIndex:(idx + 1)];
}
@end /* NGDOMNodeWithChildren */
|
