fix(ivy): compile queries in JIT mode (#26816)

PR Close #26816

packages/compiler/src/render3/view/api.ts

@@ -217,8 +217,8 @@ export interface R3QueryMetadata {
   descendants: boolean;
 
   /**
-   * An expression representing a type to read from each matched node, or null if the node itself
+   * An expression representing a type to read from each matched node, or null if the default value
-   * is to be returned.
+   * for a given node is to be returned.
    */
   read: o.Expression|null;
 }

packages/core/src/render3/jit/directive.ts

@@ -6,8 +6,9 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {ConstantPool, R3DirectiveMetadata, WrappedNodeExpr, compileComponentFromMetadata as compileR3Component, compileDirectiveFromMetadata as compileR3Directive, jitExpression, makeBindingParser, parseHostBindings, parseTemplate} from '@angular/compiler';
+import {ConstantPool, Expression, R3DirectiveMetadata, R3QueryMetadata, WrappedNodeExpr, compileComponentFromMetadata as compileR3Component, compileDirectiveFromMetadata as compileR3Directive, jitExpression, makeBindingParser, parseHostBindings, parseTemplate} from '@angular/compiler';
 
+import {Query} from '../../metadata/di';
 import {Component, Directive, HostBinding, HostListener, Input, Output} from '../../metadata/directives';
 import {componentNeedsResolution, maybeQueueResolutionOfComponentResources} from '../../metadata/resource_loading';
 import {ViewEncapsulation} from '../../metadata/view';
@@ -69,14 +70,13 @@ export function compileComponent(type: Type<any>, metadata: Component): void {
             metadata.animations !== null ? new WrappedNodeExpr(metadata.animations) : null;
 
         // Compile the component metadata, including template, into an expression.
-        // TODO(alxhub): implement inputs, outputs, queries, etc.
         const res = compileR3Component(
             {
               ...directiveMetadata(type, metadata),
               template,
               directives: new Map(),
               pipes: new Map(),
-              viewQueries: [],
+              viewQueries: extractQueriesMetadata(getReflect().propMetadata(type), isViewQuery),
               wrapDirectivesAndPipesInClosure: false,
               styles: metadata.styles || [],
               encapsulation: metadata.encapsulation || ViewEncapsulation.Emulated, animations,
@@ -176,7 +176,7 @@ function directiveMetadata(type: Type<any>, metadata: Directive): R3DirectiveMet
     deps: reflectDependencies(type), host,
     inputs: {...inputsFromMetadata, ...inputsFromType},
     outputs: {...outputsFromMetadata, ...outputsFromType},
-    queries: [],
+    queries: extractQueriesMetadata(propMetadata, isContentQuery),
     lifecycle: {
       usesOnChanges: type.prototype.ngOnChanges !== undefined,
     },
@@ -215,6 +215,38 @@ function extractHostBindings(metadata: Directive, propMetadata: {[key: string]:
   return {attributes, listeners, properties};
 }
 
+function convertToR3QueryPredicate(selector: any): Expression|string[] {
+  return typeof selector === 'string' ? splitByComma(selector) : new WrappedNodeExpr(selector);
+}
+
+export function convertToR3QueryMetadata(propertyName: string, ann: Query): R3QueryMetadata {
+  return {
+    propertyName: propertyName,
+    predicate: convertToR3QueryPredicate(ann.selector),
+    descendants: ann.descendants,
+    first: ann.first,
+    read: ann.read ? new WrappedNodeExpr(ann.read) : null
+  };
+}
+
+function extractQueriesMetadata(
+    propMetadata: {[key: string]: any[]},
+    isQueryAnn: (ann: any) => ann is Query): R3QueryMetadata[] {
+  const queriesMeta: R3QueryMetadata[] = [];
+
+  for (const field in propMetadata) {
+    if (propMetadata.hasOwnProperty(field)) {
+      propMetadata[field].forEach(ann => {
+        if (isQueryAnn(ann)) {
+          queriesMeta.push(convertToR3QueryMetadata(field, ann));
+        }
+      });
+    }
+  }
+
+  return queriesMeta;
+}
+
 function isInput(value: any): value is Input {
   return value.ngMetadataName === 'Input';
 }
@@ -231,10 +263,24 @@ function isHostListener(value: any): value is HostListener {
   return value.ngMetadataName === 'HostListener';
 }
 
+function isContentQuery(value: any): value is Query {
+  const name = value.ngMetadataName;
+  return name === 'ContentChild' || name === 'ContentChildren';
+}
+
+function isViewQuery(value: any): value is Query {
+  const name = value.ngMetadataName;
+  return name === 'ViewChild' || name === 'ViewChildren';
+}
+
+function splitByComma(value: string): string[] {
+  return value.split(',').map(piece => piece.trim());
+}
+
 function parseInputOutputs(values: string[]): StringMap {
   return values.reduce(
       (map, value) => {
-        const [field, property] = value.split(',').map(piece => piece.trim());
+        const [field, property] = splitByComma(value);
         map[field] = property || field;
         return map;
       },

packages/core/test/render3/ivy/jit_spec.ts

@@ -8,10 +8,12 @@
 
 import 'reflect-metadata';
 
+import {ElementRef, QueryList} from '@angular/core';
 import {InjectorDef, defineInjectable} from '@angular/core/src/di/defs';
 import {Injectable} from '@angular/core/src/di/injectable';
 import {inject, setCurrentInjector} from '@angular/core/src/di/injector_compatibility';
 import {ivyEnabled} from '@angular/core/src/ivy_switch';
+import {ContentChild, ContentChildren, ViewChild, ViewChildren} from '@angular/core/src/metadata/di';
 import {Component, Directive, HostBinding, HostListener, Input, Output, Pipe} from '@angular/core/src/metadata/directives';
 import {NgModule, NgModuleDef} from '@angular/core/src/metadata/ng_module';
 import {ComponentDef, PipeDef} from '@angular/core/src/render3/interfaces/definition';
@@ -304,6 +306,54 @@ ivyEnabled && describe('render3 jit', () => {
     expect((C as any).ngBaseDef).toBeDefined();
     expect((C as any).ngBaseDef.outputs).toEqual({prop1: 'alias1', prop2: 'alias2'});
   });
+
+  it('should compile ContentChildren query on a directive', () => {
+    @Directive({selector: '[test]'})
+    class TestDirective {
+      @ContentChildren('foo') foos: QueryList<ElementRef>|undefined;
+    }
+
+    expect((TestDirective as any).ngDirectiveDef.contentQueries).not.toBeNull();
+    expect((TestDirective as any).ngDirectiveDef.contentQueriesRefresh).not.toBeNull();
+  });
+
+  it('should compile ContentChild query on a directive', () => {
+    @Directive({selector: '[test]'})
+    class TestDirective {
+      @ContentChild('foo') foo: ElementRef|undefined;
+    }
+
+    expect((TestDirective as any).ngDirectiveDef.contentQueries).not.toBeNull();
+    expect((TestDirective as any).ngDirectiveDef.contentQueriesRefresh).not.toBeNull();
+  });
+
+  it('should not pick up view queries from directives', () => {
+    @Directive({selector: '[test]'})
+    class TestDirective {
+      @ViewChildren('foo') foos: QueryList<ElementRef>|undefined;
+    }
+
+    expect((TestDirective as any).ngDirectiveDef.contentQueries).toBeNull();
+    expect((TestDirective as any).ngDirectiveDef.viewQuery).toBeNull();
+  });
+
+  it('should compile ViewChild query on a component', () => {
+    @Component({selector: 'test', template: ''})
+    class TestComponent {
+      @ViewChild('foo') foo: ElementRef|undefined;
+    }
+
+    expect((TestComponent as any).ngComponentDef.foo).not.toBeNull();
+  });
+
+  it('should compile ViewChildren query on a component', () => {
+    @Component({selector: 'test', template: ''})
+    class TestComponent {
+      @ViewChildren('foo') foos: QueryList<ElementRef>|undefined;
+    }
+
+    expect((TestComponent as any).ngComponentDef.viewQuery).not.toBeNull();
+  });
 });
 
 it('ensure at least one spec exists', () => {});

packages/core/test/render3/jit/directive_spec.ts

@@ -6,9 +6,23 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {extendsDirectlyFromObject} from '../../../src/render3/jit/directive';
+import {WrappedNodeExpr} from '@angular/compiler';
+import {convertToR3QueryMetadata, extendsDirectlyFromObject} from '../../../src/render3/jit/directive';
+
+describe('jit directive helper functions', () => {
+
+  describe('extendsDirectlyFromObject', () => {
+
+    // Inheritance Example using Classes
+    class Parent {}
+    class Child extends Parent {}
+
+    // Inheritance Example using Function
+    const Parent5 = function Parent5() {} as any as{new (): {}};
+    const Child5 = function Child5() {} as any as{new (): {}};
+    Child5.prototype = new Parent5;
+    Child5.prototype.constructor = Child5;
 
-describe('extendsDirectlyFromObject', () => {
     it('should correctly behave with instanceof', () => {
       expect(new Child() instanceof Object).toBeTruthy();
       expect(new Child() instanceof Parent).toBeTruthy();
@@ -26,14 +40,57 @@ describe('extendsDirectlyFromObject', () => {
       expect(extendsDirectlyFromObject(Parent5)).toBeTruthy();
       expect(extendsDirectlyFromObject(Child5)).toBeFalsy();
     });
+  });
+
+  describe('convertToR3QueryMetadata', () => {
+
+    it('should convert decorator with a single string selector', () => {
+      expect(convertToR3QueryMetadata('propName', {
+        selector: 'localRef',
+        descendants: false,
+        first: false,
+        isViewQuery: false,
+        read: undefined
+      })).toEqual({
+        propertyName: 'propName',
+        predicate: ['localRef'],
+        descendants: false,
+        first: false,
+        read: null
+      });
+    });
+
+    it('should convert decorator with multiple string selectors', () => {
+      expect(convertToR3QueryMetadata('propName', {
+        selector: 'foo, bar,baz',
+        descendants: true,
+        first: true,
+        isViewQuery: true,
+        read: undefined
+      })).toEqual({
+        propertyName: 'propName',
+        predicate: ['foo', 'bar', 'baz'],
+        descendants: true,
+        first: true,
+        read: null
+      });
+    });
+
+    it('should convert decorator with type selector and read option', () => {
+
+      class Directive {}
+
+      const converted = convertToR3QueryMetadata('propName', {
+        selector: Directive,
+        descendants: true,
+        first: true,
+        isViewQuery: true,
+        read: Directive
+      });
+
+      expect(converted.predicate).toEqual(jasmine.any(WrappedNodeExpr));
+      expect(converted.read).toEqual(jasmine.any(WrappedNodeExpr));
+    });
+
+  });
 });
-
-// Inheritance Example using Classes
-class Parent {}
-class Child extends Parent {}
-
-// Inheritance Example using Function
-const Parent5 = function Parent5() {} as any as{new (): {}};
-const Child5 = function Child5() {} as any as{new (): {}};
-Child5.prototype = new Parent5;
-Child5.prototype.constructor = Child5;