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
| var Event = (function() {
var Event,
_default = 'default';
Event = function() {
var _listen,
_trigger,
_remove,
_shift = [].shift,
_unshift = [].unshift,
namespaceCache = {},
_create,
each = function(arr, fn) {
var ret;
for (var i = 0, l = arr.length; i < l; i++) {
var n = arr[i];
ret = fn.call(n, i, n);
}
return ret;
};
_listen = function(key, fn, cache) {
if (!cache[key]) {
cache[key] = [];
}
cache[key].push(fn);
};
_remove = function(key, cache, fn) {
if (cache[key]) {
if (fn) {
for (var i = cache[key].length - 1; i >= 0; i--) {
if (cache[key][i] === fn) {
cache[key].splice(i, 1);
}
}
}
else {
cache[key] = [];
}
}
};
_trigger = function() {
var cache = _shift.call(arguments);
var key = _shift.call(arguments);
var args = arguments;
var _this = this;
var stack = cache[key];
if (!stack || !stack.length) {
return;
}
return each(stack, function() {
return this.apply(_this, args);
})
};
_create = function(namespace) {
namespace = namespace || _default;
var cache = {};
var offlineStack = [];
var ret = {
listen: function(key, fn, last) {
_listen(key, fn, cache);
if (offlineStack === null) {
return;
}
if (last === 'last') {
offlineStack.length && offlineStack.pop()();
}
else {
each(offlineStack, function() {
this();
});
}
offlineStack = null;
},
one: function(key, fn, last) {
_remove(key, cache);
this.listen(key, fn, last);
},
remove: function(key, fn) {
_remove(key, cache, fn);
},
trigger: function() {
var fn,
args,
_this = this;
_unshift.call(arguments, cache);
args = arguments;
fn = function() {
return _trigger.apply(_this, args);
};
if (offlineStack) {
return offlineStack.push(fn);
}
return fn();
}
};
return namespace ?
(namespaceCache[namespace] ?
namespaceCache[namespace] : namespaceCache[namespace] = ret)
: ret;
};
return {
create: _create,
one: function(key, fn, last) {
var event = this.create();
event.one(key, fn, last);
},
remove: function(key, fn) {
var event = this.create();
event.remove(key, fn);
},
listen: function(key, fn, last) {
var event = this.create();
event.listen(key, fn, last);
},
trigger: function() {
var event = this.create();
event.trigger.apply(this, arguments);
}
}
}();
return Event;
}());
var fn1 = function(price) {
console.log(price);
};
Event.listen('squareMeter88', fn1);
Event.remove('squareMeter88', fn1);
Event.listen('squareMeter88', function(price) {
console.log('fn2: ' + price);
});
Event.trigger('squareMeter88', 20000);
|
