-
Notifications
You must be signed in to change notification settings - Fork 25k
/
ng_module.ts
206 lines (192 loc) Β· 6.86 KB
/
ng_module.ts
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
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {InjectableDef} from '../di/defs';
import {resolveForwardRef} from '../di/forward_ref';
import {INJECTOR, InjectFlags, Injector, setCurrentInjector} from '../di/injector';
import {APP_ROOT} from '../di/scope';
import {NgModuleRef} from '../linker/ng_module_factory';
import {stringify} from '../util';
import {DepDef, DepFlags, NgModuleData, NgModuleDefinition, NgModuleProviderDef, NodeFlags} from './types';
import {splitDepsDsl, tokenKey} from './util';
const UNDEFINED_VALUE = new Object();
const InjectorRefTokenKey = tokenKey(Injector);
const NgModuleRefTokenKey = tokenKey(NgModuleRef);
export function moduleProvideDef(
flags: NodeFlags, token: any, value: any,
deps: ([DepFlags, any] | any)[]): NgModuleProviderDef {
// Need to resolve forwardRefs as e.g. for `useValue` we
// lowered the expression and then stopped evaluating it,
// i.e. also didn't unwrap it.
value = resolveForwardRef(value);
const depDefs = splitDepsDsl(deps, stringify(token));
return {
// will bet set by the module definition
index: -1,
deps: depDefs, flags, token, value
};
}
export function moduleDef(providers: NgModuleProviderDef[]): NgModuleDefinition {
const providersByKey: {[key: string]: NgModuleProviderDef} = {};
const modules = [];
let isRoot: boolean = false;
for (let i = 0; i < providers.length; i++) {
const provider = providers[i];
if (provider.token === APP_ROOT) {
isRoot = true;
}
if (provider.flags & NodeFlags.TypeNgModule) {
modules.push(provider.token);
}
provider.index = i;
providersByKey[tokenKey(provider.token)] = provider;
}
return {
// Will be filled later...
factory: null,
providersByKey,
providers,
modules,
isRoot,
};
}
export function initNgModule(data: NgModuleData) {
const def = data._def;
const providers = data._providers = new Array(def.providers.length);
for (let i = 0; i < def.providers.length; i++) {
const provDef = def.providers[i];
if (!(provDef.flags & NodeFlags.LazyProvider)) {
providers[i] = _createProviderInstance(data, provDef);
}
}
}
export function resolveNgModuleDep(
data: NgModuleData, depDef: DepDef, notFoundValue: any = Injector.THROW_IF_NOT_FOUND): any {
if (depDef.flags & DepFlags.Value) {
return depDef.token;
}
if (depDef.flags & DepFlags.Optional) {
notFoundValue = null;
}
if (depDef.flags & DepFlags.SkipSelf) {
return data._parent.get(depDef.token, notFoundValue);
}
const tokenKey = depDef.tokenKey;
switch (tokenKey) {
case InjectorRefTokenKey:
case NgModuleRefTokenKey:
return data;
}
const providerDef = data._def.providersByKey[tokenKey];
if (providerDef) {
let providerInstance = data._providers[providerDef.index];
if (providerInstance === undefined) {
providerInstance = data._providers[providerDef.index] =
_createProviderInstance(data, providerDef);
}
return providerInstance === UNDEFINED_VALUE ? undefined : providerInstance;
} else if (depDef.token.ngInjectableDef && targetsModule(data, depDef.token.ngInjectableDef)) {
const injectableDef = depDef.token.ngInjectableDef as InjectableDef<any>;
const key = tokenKey;
const index = data._providers.length;
data._def.providersByKey[depDef.tokenKey] = {
flags: NodeFlags.TypeFactoryProvider | NodeFlags.LazyProvider,
value: injectableDef.factory,
deps: [], index,
token: depDef.token,
};
const former = setCurrentInjector(data);
try {
data._providers[index] = UNDEFINED_VALUE;
return (
data._providers[index] =
_createProviderInstance(data, data._def.providersByKey[depDef.tokenKey]));
} finally {
setCurrentInjector(former);
}
}
return data._parent.get(depDef.token, notFoundValue);
}
function moduleTransitivelyPresent(ngModule: NgModuleData, scope: any): boolean {
return ngModule._def.modules.indexOf(scope) > -1;
}
function targetsModule(ngModule: NgModuleData, def: InjectableDef<any>): boolean {
return def.providedIn != null && (moduleTransitivelyPresent(ngModule, def.providedIn) ||
def.providedIn === 'root' && ngModule._def.isRoot);
}
function _createProviderInstance(ngModule: NgModuleData, providerDef: NgModuleProviderDef): any {
let injectable: any;
switch (providerDef.flags & NodeFlags.Types) {
case NodeFlags.TypeClassProvider:
injectable = _createClass(ngModule, providerDef.value, providerDef.deps);
break;
case NodeFlags.TypeFactoryProvider:
injectable = _callFactory(ngModule, providerDef.value, providerDef.deps);
break;
case NodeFlags.TypeUseExistingProvider:
injectable = resolveNgModuleDep(ngModule, providerDef.deps[0]);
break;
case NodeFlags.TypeValueProvider:
injectable = providerDef.value;
break;
}
return injectable === undefined ? UNDEFINED_VALUE : injectable;
}
function _createClass(ngModule: NgModuleData, ctor: any, deps: DepDef[]): any {
const len = deps.length;
switch (len) {
case 0:
return new ctor();
case 1:
return new ctor(resolveNgModuleDep(ngModule, deps[0]));
case 2:
return new ctor(resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]));
case 3:
return new ctor(
resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]),
resolveNgModuleDep(ngModule, deps[2]));
default:
const depValues = new Array(len);
for (let i = 0; i < len; i++) {
depValues[i] = resolveNgModuleDep(ngModule, deps[i]);
}
return new ctor(...depValues);
}
}
function _callFactory(ngModule: NgModuleData, factory: any, deps: DepDef[]): any {
const len = deps.length;
switch (len) {
case 0:
return factory();
case 1:
return factory(resolveNgModuleDep(ngModule, deps[0]));
case 2:
return factory(resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]));
case 3:
return factory(
resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]),
resolveNgModuleDep(ngModule, deps[2]));
default:
const depValues = Array(len);
for (let i = 0; i < len; i++) {
depValues[i] = resolveNgModuleDep(ngModule, deps[i]);
}
return factory(...depValues);
}
}
export function callNgModuleLifecycle(ngModule: NgModuleData, lifecycles: NodeFlags) {
const def = ngModule._def;
for (let i = 0; i < def.providers.length; i++) {
const provDef = def.providers[i];
if (provDef.flags & NodeFlags.OnDestroy) {
const instance = ngModule._providers[i];
if (instance && instance !== UNDEFINED_VALUE) {
instance.ngOnDestroy();
}
}
}
}