@angular/core
Version:
Angular - the core framework
98 lines • 12.2 kB
JavaScript
/**
* @license
* Copyright Google LLC 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 { unwrapElementRef } from '../../linker/element_ref';
import { assertNumber } from '../../util/assert';
import { collectQueryResults, createLQuery, createTQuery, getTQuery, loadQueryInternal, materializeViewResults, saveContentQueryAndDirectiveIndex, TQueryMetadata_ } from '../query';
import { getCurrentQueryIndex, getCurrentTNode, getLView, getTView, setCurrentQueryIndex } from '../state';
import { isCreationMode } from '../util/view_utils';
/**
* Registers a QueryList, associated with a content query, for later refresh (part of a view
* refresh).
*
* @param directiveIndex Current directive index
* @param predicate The type for which the query will search
* @param flags Flags associated with the query
* @param read What to save in the query
* @returns QueryList<T>
*
* @codeGenApi
*/
export function ɵɵcontentQuery(directiveIndex, predicate, flags, read) {
ngDevMode && assertNumber(flags, 'Expecting flags');
const tView = getTView();
if (tView.firstCreatePass) {
const tNode = getCurrentTNode();
createTQuery(tView, new TQueryMetadata_(predicate, flags, read), tNode.index);
saveContentQueryAndDirectiveIndex(tView, directiveIndex);
if ((flags & 2 /* QueryFlags.isStatic */) === 2 /* QueryFlags.isStatic */) {
tView.staticContentQueries = true;
}
}
createLQuery(tView, getLView(), flags);
}
/**
* Creates new QueryList, stores the reference in LView and returns QueryList.
*
* @param predicate The type for which the query will search
* @param flags Flags associated with the query
* @param read What to save in the query
*
* @codeGenApi
*/
export function ɵɵviewQuery(predicate, flags, read) {
ngDevMode && assertNumber(flags, 'Expecting flags');
const tView = getTView();
if (tView.firstCreatePass) {
createTQuery(tView, new TQueryMetadata_(predicate, flags, read), -1);
if ((flags & 2 /* QueryFlags.isStatic */) === 2 /* QueryFlags.isStatic */) {
tView.staticViewQueries = true;
}
}
createLQuery(tView, getLView(), flags);
}
/**
* Refreshes a query by combining matches from all active views and removing matches from deleted
* views.
*
* @returns `true` if a query got dirty during change detection or if this is a static query
* resolving in creation mode, `false` otherwise.
*
* @codeGenApi
*/
export function ɵɵqueryRefresh(queryList) {
const lView = getLView();
const tView = getTView();
const queryIndex = getCurrentQueryIndex();
setCurrentQueryIndex(queryIndex + 1);
const tQuery = getTQuery(tView, queryIndex);
if (queryList.dirty &&
(isCreationMode(lView) ===
((tQuery.metadata.flags & 2 /* QueryFlags.isStatic */) === 2 /* QueryFlags.isStatic */))) {
if (tQuery.matches === null) {
queryList.reset([]);
}
else {
const result = tQuery.crossesNgTemplate ?
collectQueryResults(tView, lView, queryIndex, []) :
materializeViewResults(tView, lView, tQuery, queryIndex);
queryList.reset(result, unwrapElementRef);
queryList.notifyOnChanges();
}
return true;
}
return false;
}
/**
* Loads a QueryList corresponding to the current view or content query.
*
* @codeGenApi
*/
export function ɵɵloadQuery() {
return loadQueryInternal(getLView(), getCurrentQueryIndex());
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ProviderToken} from '../../di';\nimport {unwrapElementRef} from '../../linker/element_ref';\nimport {QueryList} from '../../linker/query_list';\nimport {assertNumber} from '../../util/assert';\nimport {QueryFlags} from '../interfaces/query';\nimport {collectQueryResults, createLQuery, createTQuery, getTQuery, loadQueryInternal, materializeViewResults, saveContentQueryAndDirectiveIndex, TQueryMetadata_} from '../query';\nimport {getCurrentQueryIndex, getCurrentTNode, getLView, getTView, setCurrentQueryIndex} from '../state';\nimport {isCreationMode} from '../util/view_utils';\n\n/**\n * Registers a QueryList, associated with a content query, for later refresh (part of a view\n * refresh).\n *\n * @param directiveIndex Current directive index\n * @param predicate The type for which the query will search\n * @param flags Flags associated with the query\n * @param read What to save in the query\n * @returns QueryList<T>\n *\n * @codeGenApi\n */\nexport function ɵɵcontentQuery<T>(\n    directiveIndex: number, predicate: ProviderToken<unknown>|string[], flags: QueryFlags,\n    read?: any): void {\n  ngDevMode && assertNumber(flags, 'Expecting flags');\n  const tView = getTView();\n  if (tView.firstCreatePass) {\n    const tNode = getCurrentTNode()!;\n    createTQuery(tView, new TQueryMetadata_(predicate, flags, read), tNode.index);\n    saveContentQueryAndDirectiveIndex(tView, directiveIndex);\n    if ((flags & QueryFlags.isStatic) === QueryFlags.isStatic) {\n      tView.staticContentQueries = true;\n    }\n  }\n\n  createLQuery<T>(tView, getLView(), flags);\n}\n\n/**\n * Creates new QueryList, stores the reference in LView and returns QueryList.\n *\n * @param predicate The type for which the query will search\n * @param flags Flags associated with the query\n * @param read What to save in the query\n *\n * @codeGenApi\n */\nexport function ɵɵviewQuery<T>(\n    predicate: ProviderToken<unknown>|string[], flags: QueryFlags, read?: any): void {\n  ngDevMode && assertNumber(flags, 'Expecting flags');\n  const tView = getTView();\n  if (tView.firstCreatePass) {\n    createTQuery(tView, new TQueryMetadata_(predicate, flags, read), -1);\n    if ((flags & QueryFlags.isStatic) === QueryFlags.isStatic) {\n      tView.staticViewQueries = true;\n    }\n  }\n  createLQuery<T>(tView, getLView(), flags);\n}\n\n/**\n * Refreshes a query by combining matches from all active views and removing matches from deleted\n * views.\n *\n * @returns `true` if a query got dirty during change detection or if this is a static query\n * resolving in creation mode, `false` otherwise.\n *\n * @codeGenApi\n */\nexport function ɵɵqueryRefresh(queryList: QueryList<any>): boolean {\n  const lView = getLView();\n  const tView = getTView();\n  const queryIndex = getCurrentQueryIndex();\n\n  setCurrentQueryIndex(queryIndex + 1);\n\n  const tQuery = getTQuery(tView, queryIndex);\n  if (queryList.dirty &&\n      (isCreationMode(lView) ===\n       ((tQuery.metadata.flags & QueryFlags.isStatic) === QueryFlags.isStatic))) {\n    if (tQuery.matches === null) {\n      queryList.reset([]);\n    } else {\n      const result = tQuery.crossesNgTemplate ?\n          collectQueryResults(tView, lView, queryIndex, []) :\n          materializeViewResults(tView, lView, tQuery, queryIndex);\n      queryList.reset(result, unwrapElementRef);\n      queryList.notifyOnChanges();\n    }\n    return true;\n  }\n\n  return false;\n}\n\n/**\n * Loads a QueryList corresponding to the current view or content query.\n *\n * @codeGenApi\n */\nexport function ɵɵloadQuery<T>(): QueryList<T> {\n  return loadQueryInternal<T>(getLView(), getCurrentQueryIndex());\n}\n"]}