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feat(change_detection): added an experimental support for observables

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This commit is contained in:
vsavkin
2015-08-18 19:00:04 +00:00
committed by Victor Savkin
parent ed81cb94b0
commit cbfc9cb344
18 changed files with 243 additions and 44 deletions
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modules/angular2/src/change_detection/codegen_logic_util.ts
+25 -8
View File
@@ -1,14 +1,20 @@
import {ListWrapper} from 'angular2/src/facade/collection';
import {BaseException, Json} from 'angular2/src/facade/lang';
import {BaseException, Json, StringWrapper} from 'angular2/src/facade/lang';
import {CodegenNameUtil} from './codegen_name_util';
import {codify, combineGeneratedStrings, rawString} from './codegen_facade';
import {ProtoRecord, RecordType} from './proto_record';
/**
* This is an experimental feature. Works only in Dart.
*/
const ON_PUSH_OBSERVE = "ON_PUSH_OBSERVE";
/**
* Class responsible for providing change detection logic for chagne detector classes.
*/
export class CodegenLogicUtil {
constructor(private _names: CodegenNameUtil, private _utilName: string) {}
constructor(private _names: CodegenNameUtil, private _utilName: string,
private _changeDetection: string) {}
/**
* Generates a statement which updates the local variable representing `protoRec` with the current
@@ -46,11 +52,13 @@ export class CodegenLogicUtil {
break;
case RecordType.PROPERTY_READ:
rhs = `${context}.${protoRec.name}`;
rhs = this._observe(`${context}.${protoRec.name}`, protoRec);
break;
case RecordType.SAFE_PROPERTY:
rhs = `${this._utilName}.isValueBlank(${context}) ? null : ${context}.${protoRec.name}`;
var read = this._observe(`${context}.${protoRec.name}`, protoRec);
rhs =
`${this._utilName}.isValueBlank(${context}) ? null : ${this._observe(read, protoRec)}`;
break;
case RecordType.PROPERTY_WRITE:
@@ -58,16 +66,17 @@ export class CodegenLogicUtil {
break;
case RecordType.LOCAL:
rhs = `${localsAccessor}.get(${rawString(protoRec.name)})`;
rhs = this._observe(`${localsAccessor}.get(${rawString(protoRec.name)})`, protoRec);
break;
case RecordType.INVOKE_METHOD:
rhs = `${context}.${protoRec.name}(${argString})`;
rhs = this._observe(`${context}.${protoRec.name}(${argString})`, protoRec);
break;
case RecordType.SAFE_INVOKE_METHOD:
var invoke = `${context}.${protoRec.name}(${argString})`;
rhs =
`${this._utilName}.isValueBlank(${context}) ? null : ${context}.${protoRec.name}(${argString})`;
`${this._utilName}.isValueBlank(${context}) ? null : ${this._observe(invoke, protoRec)}`;
break;
case RecordType.INVOKE_CLOSURE:
@@ -87,7 +96,7 @@ export class CodegenLogicUtil {
break;
case RecordType.KEYED_READ:
rhs = `${context}[${getLocalName(protoRec.args[0])}]`;
rhs = this._observe(`${context}[${getLocalName(protoRec.args[0])}]`, protoRec);
break;
case RecordType.KEYED_WRITE:
@@ -104,6 +113,14 @@ export class CodegenLogicUtil {
return `${getLocalName(protoRec.selfIndex)} = ${rhs};`;
}
_observe(exp: string, rec: ProtoRecord): string {
// This is an experimental feature. Works only in Dart.
if (StringWrapper.equals(this._changeDetection, ON_PUSH_OBSERVE)) {
return `this.observe(${exp}, ${rec.selfIndex})`;
} else {
return exp;
}
}
_genInterpolation(protoRec: ProtoRecord): string {
var iVals = [];