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
|
<html xmlns="http://www.w3.org/1999/xhtml">
<!-- NodeIterator basics and filters tests.
Originally written by Ian Hickson, Mochi-ified by Zack Weinberg.
This file based on 001.xml, 002.xml, and 010.xml from
http://hixie.ch/tests/adhoc/dom/traversal/node-iterator/
with some additional cases.
-->
<head>
<title>DOM Traversal: NodeIterator: Basics and Filters</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none">
<!-- comment -->
<?body processing instruction?>
</div>
<pre id="test">
<script class="testbody" type="text/javascript"><![CDATA[
function compare_arrays(e, f, label) {
var length = (e.length > f.length) ? e.length : f.length;
for (var i = 0; i < length; i += 1) {
if (e[i] > 0)
is(f[i], e[i], label + " - index " + i + ": ");
else
todo_is(f[i], -e[i], label + " - index " + i + ": ");
}
}
/** DOM Traversal: NodeIterator: Basics **/
// NOTE: If you change the document structure, you have to make sure
// the magic numbers in this array (and 'expected_f', below) match.
var expected = new Array(9, // document
1, // html
3, 8, // leading comment
3, 1, // head
3, 1, 3, // title
3, 1, // first script tag
3, 1, // stylesheet tag
3, // close head
3, 1, // body
3, 1, // p#display
3, 1, // div#content
3, 8, // comment
3, 7, // processing instruction
3, // close div
3, 1, // pre#test
3, 1, 4, // script and CDATA block
-3, -3, -3); // close close close
// these aren't there
// not sure why
var found = new Array();
var iterator = document.createNodeIterator(document,
NodeFilter.SHOW_ALL,
null);
var node;
// forwards
while ((node = iterator.nextNode()))
found.push(node.nodeType);
compare_arrays(expected, found, 'basics forward');
// backwards
found.length = 0;
while ((node = iterator.previousNode()))
found.unshift(node.nodeType);
compare_arrays(expected, found, 'basics backward');
/** DOM Traversal: NodeIterator: Filters **/
function filter(n) {
if (n.nodeType == 3) {
return NodeFilter.FILTER_SKIP;
} else if (n.nodeName == 'body') {
return NodeFilter.FILTER_REJECT; // same as _SKIP
}
return 1; // FILTER_ACCEPT
}
// Same warning applies to this array as to 'expected'.
var expect_f = new Array(9, // document
1, // html
8, // leading comment
1, // head
1, // title
1, // first script tag
1, // stylesheet tag
// body skipped
1, // p#display
1, // div#content
8, // comment
// processing instruction skipped
1, // pre#test
1, 4); // script and CDATA block
found.length = 0;
iterator = document.createNodeIterator(document, NodeFilter.SHOW_ALL,
filter);
// forwards
while ((node = iterator.nextNode()))
found.push(node.nodeType);
compare_arrays(expect_f, found, 'filtered forward');
// backwards
found.length = 0;
while ((node = iterator.previousNode()))
found.unshift(node.nodeType);
compare_arrays(expect_f, found, 'filtered backward');
function checkBadFilter(method, n) {
var iter =
document.createNodeIterator(document, NodeFilter.SHOW_ALL,
function() {
if (n < 0)
iter.detach();
return NodeFilter.FILTER_ACCEPT;
});
while (--n >= 0)
iter.nextNode();
try {
iter[method]();
ok(true, "Able to call " + method + " on a NodeIterator after calling no-op detach()");
} catch (x) { ok(false, x) }
}
checkBadFilter("nextNode", 2);
checkBadFilter("previousNode", 3);
(function() {
// Implementing the scenario outlined in
// http://bugzilla.mozilla.org/show_bug.cgi?id=552110#c4
var iter = (function(filt) {
var grandparent = document.createElement("div"),
parent = document.createElement("span");
grandparent.appendChild(parent);
parent.appendChild(document.createElement("img"));
parent.appendChild(document.createElement("p"));
return document.createNodeIterator(grandparent,
NodeFilter.SHOW_ALL,
filt);
})(function(n) {
if (n.nodeName != "img")
return NodeFilter.FILTER_ACCEPT;
iter.detach();
n.parentNode.remove();
// Drop any node references passed into this function.
for (var i = 0; i < arguments.length; ++i)
arguments[i] = null;
ok(!n, "arguments[0] = null should have nulled out n");
// Try to trigger GC.
var xhr = new XMLHttpRequest();
xhr.open("GET", location.href, false);
xhr.send();
return NodeFilter.FILTER_SKIP;
});
is(iter.nextNode().nodeName, "div",
"iter.nextNode() returned the wrong node");
is(iter.nextNode().nodeName, "span",
"iter.nextNode() returned the wrong node");
try {
var p = iter.nextNode();
ok(false, "iter.nextNode() should have thrown, but instead it returned <" + p.nodeName + ">");
} catch (x) { ok(true, x) }
})();
]]></script>
</pre>
</body>
</html>
|
