7c07bfff97
BREAKING CHANGE: Exceptions are no longer part of the public API. We don't expect that anyone should be referring to the Exception types. ExceptionHandler.call(exception: any, stackTrace?: any, reason?: string): void; change to: ErrorHandler.handleError(error: any): void;
93 lines
3.5 KiB
TypeScript
93 lines
3.5 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {CompilePipeMetadata} from '../compile_metadata';
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import {isBlank, isPresent} from '../facade/lang';
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import {Identifiers, identifierToken} from '../identifiers';
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import * as o from '../output/output_ast';
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import {CompileView} from './compile_view';
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import {createPureProxy, getPropertyInView, injectFromViewParentInjector} from './util';
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export class CompilePipe {
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static call(view: CompileView, name: string, args: o.Expression[]): o.Expression {
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var compView = view.componentView;
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var meta = _findPipeMeta(compView, name);
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var pipe: CompilePipe;
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if (meta.pure) {
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// pure pipes live on the component view
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pipe = compView.purePipes.get(name);
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if (isBlank(pipe)) {
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pipe = new CompilePipe(compView, meta);
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compView.purePipes.set(name, pipe);
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compView.pipes.push(pipe);
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}
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} else {
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// Non pure pipes live on the view that called it
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pipe = new CompilePipe(view, meta);
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view.pipes.push(pipe);
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}
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return pipe._call(view, args);
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}
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instance: o.ReadPropExpr;
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private _purePipeProxyCount = 0;
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constructor(public view: CompileView, public meta: CompilePipeMetadata) {
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this.instance = o.THIS_EXPR.prop(`_pipe_${meta.name}_${view.pipeCount++}`);
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var deps = this.meta.type.diDeps.map((diDep) => {
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if (diDep.token.equalsTo(identifierToken(Identifiers.ChangeDetectorRef))) {
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return getPropertyInView(o.THIS_EXPR.prop('ref'), this.view, this.view.componentView);
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}
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return injectFromViewParentInjector(diDep.token, false);
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});
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this.view.fields.push(new o.ClassField(this.instance.name, o.importType(this.meta.type)));
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this.view.createMethod.resetDebugInfo(null, null);
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this.view.createMethod.addStmt(o.THIS_EXPR.prop(this.instance.name)
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.set(o.importExpr(this.meta.type).instantiate(deps))
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.toStmt());
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}
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get pure(): boolean { return this.meta.pure; }
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private _call(callingView: CompileView, args: o.Expression[]): o.Expression {
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if (this.meta.pure) {
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// PurePipeProxies live on the view that called them.
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var purePipeProxyInstance =
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o.THIS_EXPR.prop(`${this.instance.name}_${this._purePipeProxyCount++}`);
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var pipeInstanceSeenFromPureProxy = getPropertyInView(this.instance, callingView, this.view);
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createPureProxy(
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pipeInstanceSeenFromPureProxy.prop('transform')
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.callMethod(o.BuiltinMethod.Bind, [pipeInstanceSeenFromPureProxy]),
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args.length, purePipeProxyInstance, callingView);
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return o.importExpr(Identifiers.castByValue)
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.callFn([purePipeProxyInstance, pipeInstanceSeenFromPureProxy.prop('transform')])
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.callFn(args);
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} else {
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return getPropertyInView(this.instance, callingView, this.view).callMethod('transform', args);
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}
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}
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}
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function _findPipeMeta(view: CompileView, name: string): CompilePipeMetadata {
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var pipeMeta: CompilePipeMetadata = null;
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for (var i = view.pipeMetas.length - 1; i >= 0; i--) {
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var localPipeMeta = view.pipeMetas[i];
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if (localPipeMeta.name == name) {
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pipeMeta = localPipeMeta;
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break;
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}
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}
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if (isBlank(pipeMeta)) {
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throw new Error(
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`Illegal state: Could not find pipe ${name} although the parser should have detected this error!`);
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}
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return pipeMeta;
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}
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