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
|
function Template() {
this.paths = [];
this.children = [];
this.inits = [];
}
Template.prototype = {
init: function(element, scope) {
foreach(this.inits, function(fn) {
scope.apply(fn, element);
});
var i,
childNodes = element.childNodes,
children = this.children,
paths = this.paths,
length = paths.length;
for (i = 0; i < length; i++) {
children[i].init(childNodes[paths[i]], scope);
}
},
addInit:function(init) {
if (init) {
this.inits.push(init);
}
},
addChild: function(index, template) {
this.paths.push(index);
this.children.push(template);
}
};
function Compiler(directives){
this.directives = directives;
}
DIRECTIVE = /^ng-(.*)$/;
/**
* return {
* element:
* init: function(element){...}
* }
*
* internal data structure: {
* paths: [4, 5, 6],
* directive: name,
* init: function(expression, element){}
* }
*
* template : {
* inits: [fn(), fn()}
* paths: [1, 5],
* templates: [
* inits: []
* paths: []
* templates:
* ]
* }
*/
Compiler.prototype = {
compile: function(element) {
var template = this.templetize(element);
return function(){
var scope = new Scope();
return {
scope: scope,
element:element,
init: bind(template, template.init, element, scope)
};
};
},
templetize: function(element){
var items, item, length, i, directive, init, template,
childTemplate, recurse = true;
// Process attributes/directives
for (i = 0, items = element.attributes, length = items.length;
i < length; i++) {
item = items[i];
var match = item.name.match(DIRECTIVE);
if (match) {
directive = this.directives[match[1]];
if (directive) {
init = directive.call({}, item.value, element);
template = template || new Template();
template.addInit(init);
recurse = recurse && init;
}
}
}
// Process children
if (recurse) {
for (i = 0, items = element.childNodes, length = items.length;
i < length; i++) {
if(childTemplate = this.templetize(items[i])) {
template = template || new Template();
template.addChild(i, childTemplate);
}
}
}
return template;
}
};
describe('compiler', function(){
function element(html) {
return jQuery(html)[0];
}
var compiler, directives, compile, log;
beforeEach(function(){
log = "";
directives = {
hello: function(expression, element){
log += "hello ";
return function() {
log += expression;
};
},
watch: function(expression, element){
return function() {
this.$watch(expression, function(val){
log += ":" + val;
});
};
}
};
compiler = new Compiler(directives);
compile = function(html){
var e = element(html);
var view = compiler.compile(e)(e);
view.init();
return view.scope;
};
});
it('should recognize a directive', function(){
var e = element('<div ng-directive="expr" ignore="me"></div>');
directives.directive = function(expression, element){
log += "found";
expect(expression).toEqual("expr");
expect(element).toEqual(e);
return function initFn() {
log += ":init";
};
};
var template = compiler.compile(e);
var init = template(e).init;
expect(log).toEqual("found");
init();
expect(log).toEqual("found:init");
});
it('should recurse to children', function(){
var scope = compile('<div><span ng-hello="misko"/></div>');
expect(log).toEqual("hello misko");
});
it('should watch scope', function(){
var scope = compile('<span ng-watch="name"/>');
expect(log).toEqual("");
scope.updateView();
scope.set('name', 'misko');
scope.updateView();
scope.updateView();
scope.set('name', 'adam');
scope.updateView();
scope.updateView();
expect(log).toEqual(":misko:adam");
});
it('should prevent recursion', function(){
directives.stop = function(){ return false; };
var scope = compile('<span ng-hello="misko" ng-stop="true"><span ng-hello="adam"/></span>');
expect(log).toEqual("hello misko");
});
});
|
