-
Notifications
You must be signed in to change notification settings - Fork 24.8k
/
view.ts
657 lines (578 loc) · 22.8 KB
/
view.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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
/**
* @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 {InjectionToken} from '../../di/injection_token';
import {Injector} from '../../di/injector';
import {Type} from '../../interface/type';
import {SchemaMetadata} from '../../metadata';
import {Sanitizer} from '../../sanitization/sanitizer';
import {LContainer} from './container';
import {ComponentDef, ComponentTemplate, DirectiveDef, DirectiveDefList, HostBindingsFunction, PipeDef, PipeDefList, ViewQueriesFunction} from './definition';
import {I18nUpdateOpCodes, TI18n} from './i18n';
import {TAttributes, TElementNode, TNode, TViewNode} from './node';
import {PlayerHandler} from './player';
import {LQueries, TQueries} from './query';
import {RElement, Renderer3, RendererFactory3} from './renderer';
// Below are constants for LView indices to help us look up LView members
// without having to remember the specific indices.
// Uglify will inline these when minifying so there shouldn't be a cost.
export const HOST = 0;
export const TVIEW = 1;
export const FLAGS = 2;
export const PARENT = 3;
export const NEXT = 4;
export const QUERIES = 5;
export const T_HOST = 6;
export const BINDING_INDEX = 7;
export const CLEANUP = 8;
export const CONTEXT = 9;
export const INJECTOR = 10;
export const RENDERER_FACTORY = 11;
export const RENDERER = 12;
export const SANITIZER = 13;
export const CHILD_HEAD = 14;
export const CHILD_TAIL = 15;
export const DECLARATION_VIEW = 16;
export const DECLARATION_LCONTAINER = 17;
export const PREORDER_HOOK_FLAGS = 18;
/** Size of LView's header. Necessary to adjust for it when setting slots. */
export const HEADER_OFFSET = 19;
// This interface replaces the real LView interface if it is an arg or a
// return value of a public instruction. This ensures we don't need to expose
// the actual interface, which should be kept private.
export interface OpaqueViewState {
'__brand__': 'Brand for OpaqueViewState that nothing will match';
}
/**
* `LView` stores all of the information needed to process the instructions as
* they are invoked from the template. Each embedded view and component view has its
* own `LView`. When processing a particular view, we set the `viewData` to that
* `LView`. When that view is done processing, the `viewData` is set back to
* whatever the original `viewData` was before (the parent `LView`).
*
* Keeping separate state for each view facilities view insertion / deletion, so we
* don't have to edit the data array based on which views are present.
*/
export interface LView extends Array<any> {
/**
* The host node for this LView instance, if this is a component view.
* If this is an embedded view, HOST will be null.
*/
[HOST]: RElement|null;
/**
* The static data for this view. We need a reference to this so we can easily walk up the
* node tree in DI and get the TView.data array associated with a node (where the
* directive defs are stored).
*/
readonly[TVIEW]: TView;
/** Flags for this view. See LViewFlags for more info. */
[FLAGS]: LViewFlags;
/**
* This may store an {@link LView} or {@link LContainer}.
*
* `LView` - The parent view. This is needed when we exit the view and must restore the previous
* LView. Without this, the render method would have to keep a stack of
* views as it is recursively rendering templates.
*
* `LContainer` - The current view is part of a container, and is an embedded view.
*/
[PARENT]: LView|LContainer|null;
/**
*
* The next sibling LView or LContainer.
*
* Allows us to propagate between sibling view states that aren't in the same
* container. Embedded views already have a node.next, but it is only set for
* views in the same container. We need a way to link component views and views
* across containers as well.
*/
[NEXT]: LView|LContainer|null;
/** Queries active for this view - nodes from a view are reported to those queries. */
[QUERIES]: LQueries|null;
/**
* Pointer to the `TViewNode` or `TElementNode` which represents the root of the view.
*
* If `TViewNode`, this is an embedded view of a container. We need this to be able to
* efficiently find the `LViewNode` when inserting the view into an anchor.
*
* If `TElementNode`, this is the LView of a component.
*
* If null, this is the root view of an application (root component is in this view).
*/
[T_HOST]: TViewNode|TElementNode|null;
/**
* The binding index we should access next.
*
* This is stored so that bindings can continue where they left off
* if a view is left midway through processing bindings (e.g. if there is
* a setter that creates an embedded view, like in ngIf).
*/
[BINDING_INDEX]: number;
/**
* When a view is destroyed, listeners need to be released and outputs need to be
* unsubscribed. This context array stores both listener functions wrapped with
* their context and output subscription instances for a particular view.
*
* These change per LView instance, so they cannot be stored on TView. Instead,
* TView.cleanup saves an index to the necessary context in this array.
*/
// TODO: flatten into LView[]
[CLEANUP]: any[]|null;
/**
* - For dynamic views, this is the context with which to render the template (e.g.
* `NgForContext`), or `{}` if not defined explicitly.
* - For root view of the root component the context contains change detection data.
* - For non-root components, the context is the component instance,
* - For inline views, the context is null.
*/
[CONTEXT]: {}|RootContext|null;
/** An optional Module Injector to be used as fall back after Element Injectors are consulted. */
readonly[INJECTOR]: Injector|null;
/** Renderer to be used for this view. */
[RENDERER_FACTORY]: RendererFactory3;
/** Renderer to be used for this view. */
[RENDERER]: Renderer3;
/** An optional custom sanitizer. */
[SANITIZER]: Sanitizer|null;
/**
* Reference to the first LView or LContainer beneath this LView in
* the hierarchy.
*
* Necessary to store this so views can traverse through their nested views
* to remove listeners and call onDestroy callbacks.
*/
[CHILD_HEAD]: LView|LContainer|null;
/**
* The last LView or LContainer beneath this LView in the hierarchy.
*
* The tail allows us to quickly add a new state to the end of the view list
* without having to propagate starting from the first child.
*/
[CHILD_TAIL]: LView|LContainer|null;
/**
* View where this view's template was declared.
*
* Only applicable for dynamically created views. Will be null for inline/component views.
*
* The template for a dynamically created view may be declared in a different view than
* it is inserted. We already track the "insertion view" (view where the template was
* inserted) in LView[PARENT], but we also need access to the "declaration view"
* (view where the template was declared). Otherwise, we wouldn't be able to call the
* view's template function with the proper contexts. Context should be inherited from
* the declaration view tree, not the insertion view tree.
*
* Example (AppComponent template):
*
* <ng-template #foo></ng-template> <-- declared here -->
* <some-comp [tpl]="foo"></some-comp> <-- inserted inside this component -->
*
* The <ng-template> above is declared in the AppComponent template, but it will be passed into
* SomeComp and inserted there. In this case, the declaration view would be the AppComponent,
* but the insertion view would be SomeComp. When we are removing views, we would want to
* traverse through the insertion view to clean up listeners. When we are calling the
* template function during change detection, we need the declaration view to get inherited
* context.
*/
[DECLARATION_VIEW]: LView|null;
/**
* A declaration point of embedded views (ones instantiated based on the content of a
* <ng-template>), null for other types of views.
*
* We need to track all embedded views created from a given declaration point so we can prepare
* query matches in a proper order (query matches are ordered based on their declaration point and
* _not_ the insertion point).
*/
[DECLARATION_LCONTAINER]: LContainer|null;
/**
* More flags for this view. See PreOrderHookFlags for more info.
*/
[PREORDER_HOOK_FLAGS]: PreOrderHookFlags;
}
/** Flags associated with an LView (saved in LView[FLAGS]) */
export const enum LViewFlags {
/** The state of the init phase on the first 2 bits */
InitPhaseStateIncrementer = 0b00000000001,
InitPhaseStateMask = 0b00000000011,
/**
* Whether or not the view is in creationMode.
*
* This must be stored in the view rather than using `data` as a marker so that
* we can properly support embedded views. Otherwise, when exiting a child view
* back into the parent view, `data` will be defined and `creationMode` will be
* improperly reported as false.
*/
CreationMode = 0b00000000100,
/**
* Whether or not this LView instance is on its first processing pass.
*
* An LView instance is considered to be on its "first pass" until it
* has completed one creation mode run and one update mode run. At this
* time, the flag is turned off.
*/
FirstLViewPass = 0b00000001000,
/** Whether this view has default change detection strategy (checks always) or onPush */
CheckAlways = 0b00000010000,
/**
* Whether or not manual change detection is turned on for onPush components.
*
* This is a special mode that only marks components dirty in two cases:
* 1) There has been a change to an @Input property
* 2) `markDirty()` has been called manually by the user
*
* Note that in this mode, the firing of events does NOT mark components
* dirty automatically.
*
* Manual mode is turned off by default for backwards compatibility, as events
* automatically mark OnPush components dirty in View Engine.
*
* TODO: Add a public API to ChangeDetectionStrategy to turn this mode on
*/
ManualOnPush = 0b00000100000,
/** Whether or not this view is currently dirty (needing check) */
Dirty = 0b000001000000,
/** Whether or not this view is currently attached to change detection tree. */
Attached = 0b000010000000,
/** Whether or not this view is destroyed. */
Destroyed = 0b000100000000,
/** Whether or not this view is the root view */
IsRoot = 0b001000000000,
/**
* Index of the current init phase on last 22 bits
*/
IndexWithinInitPhaseIncrementer = 0b010000000000,
IndexWithinInitPhaseShift = 10,
IndexWithinInitPhaseReset = 0b001111111111,
}
/**
* Possible states of the init phase:
* - 00: OnInit hooks to be run.
* - 01: AfterContentInit hooks to be run
* - 10: AfterViewInit hooks to be run
* - 11: All init hooks have been run
*/
export const enum InitPhaseState {
OnInitHooksToBeRun = 0b00,
AfterContentInitHooksToBeRun = 0b01,
AfterViewInitHooksToBeRun = 0b10,
InitPhaseCompleted = 0b11,
}
/** More flags associated with an LView (saved in LView[PREORDER_HOOK_FLAGS]) */
export const enum PreOrderHookFlags {
/** The index of the next pre-order hook to be called in the hooks array, on the first 16
bits */
IndexOfTheNextPreOrderHookMaskMask = 0b01111111111111111,
/**
* The number of init hooks that have already been called, on the last 16 bits
*/
NumberOfInitHooksCalledIncrementer = 0b010000000000000000,
NumberOfInitHooksCalledShift = 16,
NumberOfInitHooksCalledMask = 0b11111111111111110000000000000000,
}
/**
* Set of instructions used to process host bindings efficiently.
*
* See VIEW_DATA.md for more information.
*/
export interface ExpandoInstructions extends Array<number|HostBindingsFunction<any>|null> {}
/**
* The static data for an LView (shared between all templates of a
* given type).
*
* Stored on the `ComponentDef.tView`.
*/
export interface TView {
/**
* ID for inline views to determine whether a view is the same as the previous view
* in a certain position. If it's not, we know the new view needs to be inserted
* and the one that exists needs to be removed (e.g. if/else statements)
*
* If this is -1, then this is a component view or a dynamically created view.
*/
readonly id: number;
/**
* This is a blueprint used to generate LView instances for this TView. Copying this
* blueprint is faster than creating a new LView from scratch.
*/
blueprint: LView;
/**
* The template function used to refresh the view of dynamically created views
* and components. Will be null for inline views.
*/
template: ComponentTemplate<{}>|null;
/**
* A function containing query-related instructions.
*/
viewQuery: ViewQueriesFunction<{}>|null;
/**
* Pointer to the host `TNode` (not part of this TView).
*
* If this is a `TViewNode` for an `LViewNode`, this is an embedded view of a container.
* We need this pointer to be able to efficiently find this node when inserting the view
* into an anchor.
*
* If this is a `TElementNode`, this is the view of a root component. It has exactly one
* root TNode.
*
* If this is null, this is the view of a component that is not at root. We do not store
* the host TNodes for child component views because they can potentially have several
* different host TNodes, depending on where the component is being used. These host
* TNodes cannot be shared (due to different indices, etc).
*/
node: TViewNode|TElementNode|null;
/** Whether or not this template has been processed. */
firstTemplatePass: boolean;
/** Static data equivalent of LView.data[]. Contains TNodes, PipeDefInternal or TI18n. */
data: TData;
/**
* The binding start index is the index at which the data array
* starts to store bindings only. Saving this value ensures that we
* will begin reading bindings at the correct point in the array when
* we are in update mode.
*/
bindingStartIndex: number;
/**
* The index where the "expando" section of `LView` begins. The expando
* section contains injectors, directive instances, and host binding values.
* Unlike the "decls" and "vars" sections of `LView`, the length of this
* section cannot be calculated at compile-time because directives are matched
* at runtime to preserve locality.
*
* We store this start index so we know where to start checking host bindings
* in `setHostBindings`.
*/
expandoStartIndex: number;
/**
* Whether or not there are any static view queries tracked on this view.
*
* We store this so we know whether or not we should do a view query
* refresh after creation mode to collect static query results.
*/
staticViewQueries: boolean;
/**
* Whether or not there are any static content queries tracked on this view.
*
* We store this so we know whether or not we should do a content query
* refresh after creation mode to collect static query results.
*/
staticContentQueries: boolean;
/**
* A reference to the first child node located in the view.
*/
firstChild: TNode|null;
/**
* Set of instructions used to process host bindings efficiently.
*
* See VIEW_DATA.md for more information.
*/
expandoInstructions: ExpandoInstructions|null;
/**
* Full registry of directives and components that may be found in this view.
*
* It's necessary to keep a copy of the full def list on the TView so it's possible
* to render template functions without a host component.
*/
directiveRegistry: DirectiveDefList|null;
/**
* Full registry of pipes that may be found in this view.
*
* The property is either an array of `PipeDefs`s or a function which returns the array of
* `PipeDefs`s. The function is necessary to be able to support forward declarations.
*
* It's necessary to keep a copy of the full def list on the TView so it's possible
* to render template functions without a host component.
*/
pipeRegistry: PipeDefList|null;
/**
* Array of ngOnInit, ngOnChanges and ngDoCheck hooks that should be executed for this view in
* creation mode.
*
* Even indices: Directive index
* Odd indices: Hook function
*/
preOrderHooks: HookData|null;
/**
* Array of ngOnChanges and ngDoCheck hooks that should be executed for this view in update mode.
*
* Even indices: Directive index
* Odd indices: Hook function
*/
preOrderCheckHooks: HookData|null;
/**
* Array of ngAfterContentInit and ngAfterContentChecked hooks that should be executed
* for this view in creation mode.
*
* Even indices: Directive index
* Odd indices: Hook function
*/
contentHooks: HookData|null;
/**
* Array of ngAfterContentChecked hooks that should be executed for this view in update
* mode.
*
* Even indices: Directive index
* Odd indices: Hook function
*/
contentCheckHooks: HookData|null;
/**
* Array of ngAfterViewInit and ngAfterViewChecked hooks that should be executed for
* this view in creation mode.
*
* Even indices: Directive index
* Odd indices: Hook function
*/
viewHooks: HookData|null;
/**
* Array of ngAfterViewChecked hooks that should be executed for this view in
* update mode.
*
* Even indices: Directive index
* Odd indices: Hook function
*/
viewCheckHooks: HookData|null;
/**
* Array of ngOnDestroy hooks that should be executed when this view is destroyed.
*
* Even indices: Directive index
* Odd indices: Hook function
*/
destroyHooks: HookData|null;
/**
* When a view is destroyed, listeners need to be released and outputs need to be
* unsubscribed. This cleanup array stores both listener data (in chunks of 4)
* and output data (in chunks of 2) for a particular view. Combining the arrays
* saves on memory (70 bytes per array) and on a few bytes of code size (for two
* separate for loops).
*
* If it's a native DOM listener or output subscription being stored:
* 1st index is: event name `name = tView.cleanup[i+0]`
* 2nd index is: index of native element or a function that retrieves global target (window,
* document or body) reference based on the native element:
* `typeof idxOrTargetGetter === 'function'`: global target getter function
* `typeof idxOrTargetGetter === 'number'`: index of native element
*
* 3rd index is: index of listener function `listener = lView[CLEANUP][tView.cleanup[i+2]]`
* 4th index is: `useCaptureOrIndx = tView.cleanup[i+3]`
* `typeof useCaptureOrIndx == 'boolean' : useCapture boolean
* `typeof useCaptureOrIndx == 'number':
* `useCaptureOrIndx >= 0` `removeListener = LView[CLEANUP][useCaptureOrIndx]`
* `useCaptureOrIndx < 0` `subscription = LView[CLEANUP][-useCaptureOrIndx]`
*
* If it's an output subscription or query list destroy hook:
* 1st index is: output unsubscribe function / query list destroy function
* 2nd index is: index of function context in LView.cleanupInstances[]
* `tView.cleanup[i+0].call(lView[CLEANUP][tView.cleanup[i+1]])`
*/
cleanup: any[]|null;
/**
* A list of element indices for child components that will need to be
* refreshed when the current view has finished its check. These indices have
* already been adjusted for the HEADER_OFFSET.
*
*/
components: number[]|null;
/**
* A collection of queries tracked in a given view.
*/
queries: TQueries|null;
/**
* An array of indices pointing to directives with content queries alongside with the
* corresponding
* query index. Each entry in this array is a tuple of:
* - index of the first content query index declared by a given directive;
* - index of a directive.
*
* We are storing those indexes so we can refresh content queries as part of a view refresh
* process.
*/
contentQueries: number[]|null;
/**
* Set of schemas that declare elements to be allowed inside the view.
*/
schemas: SchemaMetadata[]|null;
/**
* Array of attributes for all of the elements in the view. Used
* for directive matching and attribute bindings.
*/
consts: TAttributes[]|null;
}
export const enum RootContextFlags {Empty = 0b00, DetectChanges = 0b01, FlushPlayers = 0b10}
/**
* RootContext contains information which is shared for all components which
* were bootstrapped with {@link renderComponent}.
*/
export interface RootContext {
/**
* A function used for scheduling change detection in the future. Usually
* this is `requestAnimationFrame`.
*/
scheduler: (workFn: () => void) => void;
/**
* A promise which is resolved when all components are considered clean (not dirty).
*
* This promise is overwritten every time a first call to {@link markDirty} is invoked.
*/
clean: Promise<null>;
/**
* RootComponents - The components that were instantiated by the call to
* {@link renderComponent}.
*/
components: {}[];
/**
* The player flushing handler to kick off all animations
*/
playerHandler: PlayerHandler|null;
/**
* What render-related operations to run once a scheduler has been set
*/
flags: RootContextFlags;
}
/**
* Array of hooks that should be executed for a view and their directive indices.
*
* For each node of the view, the following data is stored:
* 1) Node index (optional)
* 2) A series of number/function pairs where:
* - even indices are directive indices
* - odd indices are hook functions
*
* Special cases:
* - a negative directive index flags an init hook (ngOnInit, ngAfterContentInit, ngAfterViewInit)
*/
export type HookData = (number | (() => void))[];
/**
* Static data that corresponds to the instance-specific data array on an LView.
*
* Each node's static data is stored in tData at the same index that it's stored
* in the data array. Any nodes that do not have static data store a null value in
* tData to avoid a sparse array.
*
* Each pipe's definition is stored here at the same index as its pipe instance in
* the data array.
*
* Each host property's name is stored here at the same index as its value in the
* data array.
*
* Each property binding name is stored here at the same index as its value in
* the data array. If the binding is an interpolation, the static string values
* are stored parallel to the dynamic values. Example:
*
* id="prefix {{ v0 }} a {{ v1 }} b {{ v2 }} suffix"
*
* LView | TView.data
*------------------------
* v0 value | 'a'
* v1 value | 'b'
* v2 value | id � prefix � suffix
*
* Injector bloom filters are also stored here.
*/
export type TData =
(TNode | PipeDef<any>| DirectiveDef<any>| ComponentDef<any>| number | Type<any>|
InjectionToken<any>| TI18n | I18nUpdateOpCodes | null | string)[];
// Note: This hack is necessary so we don't erroneously get a circular dependency
// failure based on types.
export const unusedValueExportToPlacateAjd = 1;