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feat(change detect): Throw on attempts to use dehydrated detector 

- Modify change detectors to `throw` when attempting to detect changes
  on a dehydrated detector.
- Modify `DynamicChagneDetector` to use `null` for the `context` of a
  dehydrated detector.
This commit is contained in:
Tim Blasi 2015-06-05 17:33:51 -07:00
parent cd95e078fe
commit b6e95bb96e
10 changed files with 78 additions and 33 deletions
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1
modules/angular2/change_detection.ts
View File

@ -19,6 +19,7 @@ export {Parser} from './src/change_detection/parser/parser';
export {Locals} from './src/change_detection/parser/locals';
export {
DehydratedException,
ExpressionChangedAfterItHasBeenChecked,
ChangeDetectionError
} from './src/change_detection/exceptions';

6
modules/angular2/src/change_detection/change_detection_jit_generator.dart
View File

@ -1,5 +1,11 @@
library change_detectoin.change_detection_jit_generator;
/// Placeholder JIT generator for Dart.
/// Dart does not support `eval`, so JIT generation is not an option. Instead,
/// the Dart transformer pre-generates these Change Detector classes and
/// registers them with the system. See `PreGeneratedChangeDetection`,
/// `PregenProtoChangeDetector`, and
/// `src/transform/template_compiler/change_detector_codegen.dart` for details.
class ChangeDetectorJITGenerator {
ChangeDetectorJITGenerator(typeName, strategy, records, directiveMementos) {}

5
modules/angular2/src/change_detection/change_detection_jit_generator.ts
View File

@ -98,6 +98,9 @@ export class ChangeDetectorJITGenerator {
${this.typeName}.prototype = Object.create(${ABSTRACT_CHANGE_DETECTOR}.prototype);
${this.typeName}.prototype.detectChangesInRecords = function(throwOnChange) {
if (!this.hydrated()) {
${UTIL}.throwDehydrated();
}
${this._genLocalDefinitions()}
${this._genChangeDefinitions()}
var ${IS_CHANGED_LOCAL} = false;
@ -131,7 +134,7 @@ export class ChangeDetectorJITGenerator {
}
${this.typeName}.prototype.hydrated = function() {
return Boolean(${CONTEXT_ACCESSOR});
return ${CONTEXT_ACCESSOR} !== null;
}
return function(dispatcher, pipeRegistry) {

4
modules/angular2/src/change_detection/change_detection_util.ts
View File

@ -1,7 +1,7 @@
import {isPresent, isBlank, BaseException, Type} from 'angular2/src/facade/lang';
import {List, ListWrapper, MapWrapper, StringMapWrapper} from 'angular2/src/facade/collection';
import {ProtoRecord} from './proto_record';
import {ExpressionChangedAfterItHasBeenChecked} from './exceptions';
import {DehydratedException, ExpressionChangedAfterItHasBeenChecked} from './exceptions';
import {WrappedValue} from './pipes/pipe';
import {CHECK_ALWAYS, CHECK_ONCE, CHECKED, DETACHED, ON_PUSH} from './constants';
@ -127,6 +127,8 @@ export class ChangeDetectionUtil {
throw new ExpressionChangedAfterItHasBeenChecked(proto, change);
}
static throwDehydrated() { throw new DehydratedException(); }
static changeDetectionMode(strategy: string) {
return strategy == ON_PUSH ? CHECK_ONCE : CHECK_ALWAYS;
}

11
modules/angular2/src/change_detection/dynamic_change_detector.ts
View File

@ -44,7 +44,8 @@ export class DynamicChangeDetector extends AbstractChangeDetector {
this.prevContexts = ListWrapper.createFixedSize(protos.length + 1);
this.changes = ListWrapper.createFixedSize(protos.length + 1);
ListWrapper.fill(this.values, uninitialized);
this.values[0] = null;
ListWrapper.fill(this.values, uninitialized, 1);
ListWrapper.fill(this.pipes, null);
ListWrapper.fill(this.prevContexts, uninitialized);
ListWrapper.fill(this.changes, false);
@ -60,7 +61,8 @@ export class DynamicChangeDetector extends AbstractChangeDetector {
dehydrate() {
this._destroyPipes();
ListWrapper.fill(this.values, uninitialized);
this.values[0] = null;
ListWrapper.fill(this.values, uninitialized, 1);
ListWrapper.fill(this.changes, false);
ListWrapper.fill(this.pipes, null);
ListWrapper.fill(this.prevContexts, uninitialized);
@ -75,9 +77,12 @@ export class DynamicChangeDetector extends AbstractChangeDetector {
}
}
hydrated(): boolean { return this.values[0] !== uninitialized; }
hydrated(): boolean { return this.values[0] !== null; }
detectChangesInRecords(throwOnChange: boolean) {
if (!this.hydrated()) {
ChangeDetectionUtil.throwDehydrated();
}
var protos: List<ProtoRecord> = this.protos;
var changes = null;

6
modules/angular2/src/change_detection/exceptions.ts
View File

@ -27,4 +27,8 @@ export class ChangeDetectionError extends BaseException {
}
toString(): string { return this.message; }
}
}
export class DehydratedException extends BaseException {
constructor() { super('Attempt to detect changes on a dehydrated detector.'); }
}

5
modules/angular2/src/transform/template_compiler/change_detector_codegen.dart
View File

@ -113,6 +113,9 @@ class _CodegenState {
this.$_DIRECTIVES_ACCESSOR) : super();
void detectChangesInRecords(throwOnChange) {
if (!hydrated()) {
$_UTIL.throwDehydrated();
}
${_genLocalDefinitions()}
${_genChangeDefinitons()}
var $_IS_CHANGED_LOCAL = false;
@ -145,7 +148,7 @@ class _CodegenState {
$_LOCALS_ACCESSOR = null;
}
hydrated() => $_CONTEXT_ACCESSOR == null;
hydrated() => $_CONTEXT_ACCESSOR != null;
static $_GEN_PREFIX.ProtoChangeDetector
$PROTO_CHANGE_DETECTOR_FACTORY_METHOD(

67
modules/angular2/test/change_detection/change_detector_spec.ts
View File

@ -11,6 +11,7 @@ import {
} from 'angular2/test_lib';
import {
CONST_EXPR,
isPresent,
isBlank,
isJsObject,
@ -21,6 +22,7 @@ import {List, ListWrapper, MapWrapper, StringMapWrapper} from 'angular2/src/faca
import {
ChangeDispatcher,
DehydratedException,
DynamicChangeDetector,
ChangeDetectionError,
BindingRecord,
@ -47,6 +49,7 @@ import {
import {getDefinition} from './simple_watch_config';
import {getFactoryById} from './generated/simple_watch_classes';
const _DEFAULT_CONTEXT = CONST_EXPR(new Object());
export function main() {
// These tests also run against pre-generated Dart Change Detectors. We will move tests up from
@ -72,7 +75,7 @@ export function main() {
}
}
function _bindSimpleValue(expression: string, context = null) {
function _bindSimpleValue(expression: string, context = _DEFAULT_CONTEXT) {
var dispatcher = new TestDispatcher();
var testDef = getDefinition(expression);
var protoCd = _getProtoChangeDetector(testDef.cdDef);
@ -297,7 +300,7 @@ export function main() {
function dirs(directives: List<any>) { return new FakeDirectives(directives, []); }
function createChangeDetector(propName: string, exp: string, context = null,
function createChangeDetector(propName: string, exp: string, context = _DEFAULT_CONTEXT,
registry = null) {
var dispatcher = new TestDispatcher();
@ -444,7 +447,7 @@ export function main() {
var cd = pcd.instantiate(dispatcher);
cd.hydrate(null, null, dirs([directive1]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([directive1]));
cd.detectChanges();
@ -465,7 +468,7 @@ export function main() {
var cd = pcd.instantiate(dispatcher);
cd.hydrate(null, null, dirs([directive1, directive2]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([directive1, directive2]));
cd.detectChanges();
@ -482,7 +485,7 @@ export function main() {
var cd = pcd.instantiate(dispatcher);
cd.hydrate(null, null, dirs([directive1]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([directive1]));
cd.detectChanges();
@ -502,7 +505,7 @@ export function main() {
var cd = pcd.instantiate(dispatcher);
cd.hydrate(null, null, dirs([directive1]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([directive1]));
cd.checkNoChanges();
@ -518,7 +521,7 @@ export function main() {
var cd = pcd.instantiate(dispatcher);
cd.hydrate(null, null, dirs([directive1]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([directive1]));
cd.detectChanges();
@ -538,7 +541,7 @@ export function main() {
var cd = pcd.instantiate(dispatcher);
cd.hydrate(null, null, dirs([directive1]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([directive1]));
cd.checkNoChanges();
@ -551,7 +554,7 @@ export function main() {
var pcd = createProtoChangeDetector([], [], [dirRecord1, dirRecord2]);
var cd = pcd.instantiate(dispatcher);
cd.hydrate(null, null, dirs([directive1, directive2]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([directive1, directive2]));
cd.detectChanges();
@ -582,7 +585,7 @@ export function main() {
var cd = pcd.instantiate(dispatcher);
cd.hydrate(null, null, dirs([directive1]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([directive1]));
cd.detectChanges();
@ -599,7 +602,7 @@ export function main() {
td1 = new TestDirective(() => ListWrapper.push(onChangesDoneCalls, td1));
var td2;
td2 = new TestDirective(() => ListWrapper.push(onChangesDoneCalls, td2));
cd.hydrate(null, null, dirs([td1, td2]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([td1, td2]));
cd.detectChanges();
@ -620,8 +623,8 @@ export function main() {
var parentDirective =
new TestDirective(() => { expect(directiveInShadowDom.a).toBe(null); });
parent.hydrate(null, null, dirs([parentDirective]));
child.hydrate(null, null, dirs([directiveInShadowDom]));
parent.hydrate(_DEFAULT_CONTEXT, null, dirs([parentDirective]));
child.hydrate(_DEFAULT_CONTEXT, null, dirs([directiveInShadowDom]));
parent.detectChanges();
});
@ -641,7 +644,7 @@ export function main() {
[BindingRecord.createForHostProperty(index, ast("a"), "prop")], null,
[dirRecord]);
var cd = pcd.instantiate(dispatcher);
cd.hydrate(null, null, dirs([directive]));
cd.hydrate(_DEFAULT_CONTEXT, null, dirs([directive]));
cd.detectChanges();
@ -688,7 +691,7 @@ export function main() {
var cd = pcd.instantiate(
new TestDispatcher(),
[BindingRecord.createForElement(ast("invalidProp"), 0, "a")], null, []);
cd.hydrate(null, null);
cd.hydrate(_DEFAULT_CONTEXT, null);
try {
cd.detectChanges();
@ -747,7 +750,7 @@ export function main() {
expect(cd.mode).toEqual(null);
cd.hydrate(null, null, null);
cd.hydrate(_DEFAULT_CONTEXT, null, null);
expect(cd.mode).toEqual(CHECK_ALWAYS);
});
@ -755,7 +758,7 @@ export function main() {
it("should set the mode to CHECK_ONCE when the push change detection is used", () => {
var proto = createProtoChangeDetector([], [], [], null, ON_PUSH);
var cd = proto.instantiate(null);
cd.hydrate(null, null, null);
cd.hydrate(_DEFAULT_CONTEXT, null, null);
expect(cd.mode).toEqual(CHECK_ONCE);
});
@ -765,6 +768,7 @@ export function main() {
var cd = c["changeDetector"];
var dispatcher = c["dispatcher"];
cd.hydrate(_DEFAULT_CONTEXT, null, null);
cd.mode = DETACHED;
cd.detectChanges();
@ -776,6 +780,7 @@ export function main() {
var cd = c["changeDetector"];
var dispatcher = c["dispatcher"];
cd.hydrate(_DEFAULT_CONTEXT, null, null);
cd.mode = CHECKED;
cd.detectChanges();
@ -784,6 +789,7 @@ export function main() {
it("should change CHECK_ONCE to CHECKED", () => {
var cd = createProtoChangeDetector([]).instantiate(null);
cd.hydrate(_DEFAULT_CONTEXT, null, null);
cd.mode = CHECK_ONCE;
cd.detectChanges();
@ -793,6 +799,7 @@ export function main() {
it("should not change the CHECK_ALWAYS", () => {
var cd = createProtoChangeDetector([]).instantiate(null);
cd.hydrate(_DEFAULT_CONTEXT, null, null);
cd.mode = CHECK_ALWAYS;
cd.detectChanges();
@ -809,7 +816,7 @@ export function main() {
beforeEach(() => {
var proto = createProtoChangeDetector([], [], [], null, ON_PUSH);
checkedDetector = proto.instantiate(null);
checkedDetector.hydrate(null, null, null);
checkedDetector.hydrate(_DEFAULT_CONTEXT, null, null);
checkedDetector.mode = CHECKED;
// this directive is a component with ON_PUSH change detection
@ -829,7 +836,7 @@ export function main() {
[dirRecordWithOnPush]);
var cd = proto.instantiate(null);
cd.hydrate(null, null, directives);
cd.hydrate(_DEFAULT_CONTEXT, null, directives);
expect(checkedDetector.mode).toEqual(CHECKED);
@ -898,6 +905,21 @@ export function main() {
expect(pipe.destroyCalled).toBe(true);
});
it("should throw when detectChanges is called on a dehydrated detector", () => {
var context = new Person('Bob');
var c = createChangeDetector("propName", "name", context);
var cd = c["changeDetector"];
var log = c["dispatcher"].log;
cd.detectChanges();
expect(log).toEqual(["propName=Bob"]);
cd.dehydrate();
var dehydratedException = new DehydratedException();
expect(() => {cd.detectChanges()}).toThrowError(dehydratedException.toString());
expect(log).toEqual(["propName=Bob"]);
});
});
describe("pipes", () => {
@ -1098,13 +1120,8 @@ class TestDirective {
}
class Person {
name: string;
age: number;
address: Address;
constructor(name: string, address: Address = null) {
this.name = name;
this.address = address;
}
constructor(public name: string, public address: Address = null) {}
sayHi(m) { return `Hi, ${m}`; }

5
modules/angular2/test/transform/integration/two_annotations_files/expected/bar.ng_deps.dart
View File

@ -34,6 +34,9 @@ class _MyComponent_ChangeDetector0 extends _gen.AbstractChangeDetector {
: super();
void detectChangesInRecords(throwOnChange) {
if (!hydrated()) {
_gen.ChangeDetectionUtil.throwDehydrated();
}
var context = null;
var change_context = false;
var isChanged = false;
@ -56,7 +59,7 @@ class _MyComponent_ChangeDetector0 extends _gen.AbstractChangeDetector {
_locals = null;
}
hydrated() => _context == null;
hydrated() => _context != null;
static _gen.ProtoChangeDetector newProtoChangeDetector(
_gen.PipeRegistry registry, _gen.ChangeDetectorDefinition def) {

1
modules/benchmarks/src/change_detection/change_detection_benchmark.ts
View File

@ -280,6 +280,7 @@ function setUpChangeDetection(changeDetection: ChangeDetection, iterations, obje
new ChangeDetectorDefinition("proto", null, [], bindings, [directiveRecord]));
var targetObj = new Obj();
parentCd.hydrate(object, null, new FakeDirectives(targetObj));
for (var i = 0; i < iterations; ++i) {
var cd = proto.instantiate(dispatcher);
cd.hydrate(object, null, new FakeDirectives(targetObj));