[6a3a178] | 1 | /**
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| 2 | * @license
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| 3 | * Copyright Google LLC All Rights Reserved.
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| 4 | *
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| 5 | * Use of this source code is governed by an MIT-style license that can be
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| 6 | * found in the LICENSE file at https://angular.io/license
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| 7 | */
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| 8 | import * as o from '../../output/output_ast';
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| 9 | import { splitAtColon } from '../../util';
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| 10 | import * as t from '../r3_ast';
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| 11 | import { isI18nAttribute } from './i18n/util';
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| 12 | /**
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| 13 | * Checks whether an object key contains potentially unsafe chars, thus the key should be wrapped in
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| 14 | * quotes. Note: we do not wrap all keys into quotes, as it may have impact on minification and may
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| 15 | * bot work in some cases when object keys are mangled by minifier.
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| 16 | *
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| 17 | * TODO(FW-1136): this is a temporary solution, we need to come up with a better way of working with
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| 18 | * inputs that contain potentially unsafe chars.
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| 19 | */
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| 20 | const UNSAFE_OBJECT_KEY_NAME_REGEXP = /[-.]/;
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| 21 | /** Name of the temporary to use during data binding */
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| 22 | export const TEMPORARY_NAME = '_t';
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| 23 | /** Name of the context parameter passed into a template function */
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| 24 | export const CONTEXT_NAME = 'ctx';
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| 25 | /** Name of the RenderFlag passed into a template function */
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| 26 | export const RENDER_FLAGS = 'rf';
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| 27 | /** The prefix reference variables */
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| 28 | export const REFERENCE_PREFIX = '_r';
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| 29 | /** The name of the implicit context reference */
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| 30 | export const IMPLICIT_REFERENCE = '$implicit';
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| 31 | /** Non bindable attribute name **/
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| 32 | export const NON_BINDABLE_ATTR = 'ngNonBindable';
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| 33 | /** Name for the variable keeping track of the context returned by `ɵɵrestoreView`. */
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| 34 | export const RESTORED_VIEW_CONTEXT_NAME = 'restoredCtx';
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| 35 | /**
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| 36 | * Creates an allocator for a temporary variable.
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| 37 | *
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| 38 | * A variable declaration is added to the statements the first time the allocator is invoked.
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| 39 | */
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| 40 | export function temporaryAllocator(statements, name) {
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| 41 | let temp = null;
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| 42 | return () => {
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| 43 | if (!temp) {
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| 44 | statements.push(new o.DeclareVarStmt(TEMPORARY_NAME, undefined, o.DYNAMIC_TYPE));
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| 45 | temp = o.variable(name);
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| 46 | }
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| 47 | return temp;
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| 48 | };
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| 49 | }
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| 50 | export function unsupported(feature) {
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| 51 | if (this) {
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| 52 | throw new Error(`Builder ${this.constructor.name} doesn't support ${feature} yet`);
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| 53 | }
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| 54 | throw new Error(`Feature ${feature} is not supported yet`);
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| 55 | }
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| 56 | export function invalid(arg) {
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| 57 | throw new Error(`Invalid state: Visitor ${this.constructor.name} doesn't handle ${arg.constructor.name}`);
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| 58 | }
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| 59 | export function asLiteral(value) {
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| 60 | if (Array.isArray(value)) {
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| 61 | return o.literalArr(value.map(asLiteral));
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| 62 | }
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| 63 | return o.literal(value, o.INFERRED_TYPE);
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| 64 | }
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| 65 | export function conditionallyCreateMapObjectLiteral(keys, keepDeclared) {
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| 66 | if (Object.getOwnPropertyNames(keys).length > 0) {
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| 67 | return mapToExpression(keys, keepDeclared);
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| 68 | }
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| 69 | return null;
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| 70 | }
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| 71 | function mapToExpression(map, keepDeclared) {
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| 72 | return o.literalMap(Object.getOwnPropertyNames(map).map(key => {
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| 73 | // canonical syntax: `dirProp: publicProp`
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| 74 | // if there is no `:`, use dirProp = elProp
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| 75 | const value = map[key];
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| 76 | let declaredName;
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| 77 | let publicName;
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| 78 | let minifiedName;
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| 79 | let needsDeclaredName;
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| 80 | if (Array.isArray(value)) {
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| 81 | [publicName, declaredName] = value;
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| 82 | minifiedName = key;
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| 83 | needsDeclaredName = publicName !== declaredName;
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| 84 | }
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| 85 | else {
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| 86 | [declaredName, publicName] = splitAtColon(key, [key, value]);
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| 87 | minifiedName = declaredName;
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| 88 | // Only include the declared name if extracted from the key, i.e. the key contains a colon.
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| 89 | // Otherwise the declared name should be omitted even if it is different from the public name,
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| 90 | // as it may have already been minified.
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| 91 | needsDeclaredName = publicName !== declaredName && key.includes(':');
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| 92 | }
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| 93 | return {
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| 94 | key: minifiedName,
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| 95 | // put quotes around keys that contain potentially unsafe characters
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| 96 | quoted: UNSAFE_OBJECT_KEY_NAME_REGEXP.test(minifiedName),
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| 97 | value: (keepDeclared && needsDeclaredName) ?
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| 98 | o.literalArr([asLiteral(publicName), asLiteral(declaredName)]) :
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| 99 | asLiteral(publicName)
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| 100 | };
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| 101 | }));
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| 102 | }
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| 103 | /**
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| 104 | * Remove trailing null nodes as they are implied.
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| 105 | */
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| 106 | export function trimTrailingNulls(parameters) {
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| 107 | while (o.isNull(parameters[parameters.length - 1])) {
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| 108 | parameters.pop();
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| 109 | }
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| 110 | return parameters;
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| 111 | }
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| 112 | export function getQueryPredicate(query, constantPool) {
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| 113 | if (Array.isArray(query.predicate)) {
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| 114 | let predicate = [];
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| 115 | query.predicate.forEach((selector) => {
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| 116 | // Each item in predicates array may contain strings with comma-separated refs
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| 117 | // (for ex. 'ref, ref1, ..., refN'), thus we extract individual refs and store them
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| 118 | // as separate array entities
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| 119 | const selectors = selector.split(',').map(token => o.literal(token.trim()));
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| 120 | predicate.push(...selectors);
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| 121 | });
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| 122 | return constantPool.getConstLiteral(o.literalArr(predicate), true);
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| 123 | }
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| 124 | else {
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| 125 | return query.predicate;
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| 126 | }
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| 127 | }
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| 128 | /**
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| 129 | * A representation for an object literal used during codegen of definition objects. The generic
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| 130 | * type `T` allows to reference a documented type of the generated structure, such that the
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| 131 | * property names that are set can be resolved to their documented declaration.
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| 132 | */
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| 133 | export class DefinitionMap {
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| 134 | constructor() {
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| 135 | this.values = [];
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| 136 | }
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| 137 | set(key, value) {
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| 138 | if (value) {
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| 139 | this.values.push({ key: key, value, quoted: false });
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| 140 | }
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| 141 | }
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| 142 | toLiteralMap() {
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| 143 | return o.literalMap(this.values);
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| 144 | }
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| 145 | }
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| 146 | /**
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| 147 | * Extract a map of properties to values for a given element or template node, which can be used
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| 148 | * by the directive matching machinery.
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| 149 | *
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| 150 | * @param elOrTpl the element or template in question
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| 151 | * @return an object set up for directive matching. For attributes on the element/template, this
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| 152 | * object maps a property name to its (static) value. For any bindings, this map simply maps the
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| 153 | * property name to an empty string.
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| 154 | */
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| 155 | export function getAttrsForDirectiveMatching(elOrTpl) {
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| 156 | const attributesMap = {};
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| 157 | if (elOrTpl instanceof t.Template && elOrTpl.tagName !== 'ng-template') {
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| 158 | elOrTpl.templateAttrs.forEach(a => attributesMap[a.name] = '');
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| 159 | }
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| 160 | else {
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| 161 | elOrTpl.attributes.forEach(a => {
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| 162 | if (!isI18nAttribute(a.name)) {
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| 163 | attributesMap[a.name] = a.value;
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| 164 | }
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| 165 | });
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| 166 | elOrTpl.inputs.forEach(i => {
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| 167 | attributesMap[i.name] = '';
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| 168 | });
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| 169 | elOrTpl.outputs.forEach(o => {
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| 170 | attributesMap[o.name] = '';
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| 171 | });
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| 172 | }
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| 173 | return attributesMap;
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| 174 | }
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| 175 | /** Returns a call expression to a chained instruction, e.g. `property(params[0])(params[1])`. */
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| 176 | export function chainedInstruction(reference, calls, span) {
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| 177 | let expression = o.importExpr(reference, null, span);
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| 178 | if (calls.length > 0) {
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| 179 | for (let i = 0; i < calls.length; i++) {
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| 180 | expression = expression.callFn(calls[i], span);
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| 181 | }
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| 182 | }
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| 183 | else {
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| 184 | // Add a blank invocation, in case the `calls` array is empty.
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| 185 | expression = expression.callFn([], span);
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| 186 | }
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| 187 | return expression;
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| 188 | }
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| 189 | /**
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| 190 | * Gets the number of arguments expected to be passed to a generated instruction in the case of
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| 191 | * interpolation instructions.
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| 192 | * @param interpolation An interpolation ast
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| 193 | */
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| 194 | export function getInterpolationArgsLength(interpolation) {
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| 195 | const { expressions, strings } = interpolation;
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| 196 | if (expressions.length === 1 && strings.length === 2 && strings[0] === '' && strings[1] === '') {
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| 197 | // If the interpolation has one interpolated value, but the prefix and suffix are both empty
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| 198 | // strings, we only pass one argument, to a special instruction like `propertyInterpolate` or
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| 199 | // `textInterpolate`.
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| 200 | return 1;
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| 201 | }
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| 202 | else {
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| 203 | return expressions.length + strings.length;
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| 204 | }
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| 205 | }
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| 206 | //# 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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 {ConstantPool} from '../../constant_pool';\nimport {Interpolation} from '../../expression_parser/ast';\nimport * as o from '../../output/output_ast';\nimport {ParseSourceSpan} from '../../parse_util';\nimport {splitAtColon} from '../../util';\nimport * as t from '../r3_ast';\n\nimport {R3QueryMetadata} from './api';\nimport {isI18nAttribute} from './i18n/util';\n\n\n/**\n * Checks whether an object key contains potentially unsafe chars, thus the key should be wrapped in\n * quotes. Note: we do not wrap all keys into quotes, as it may have impact on minification and may\n * bot work in some cases when object keys are mangled by minifier.\n *\n * TODO(FW-1136): this is a temporary solution, we need to come up with a better way of working with\n * inputs that contain potentially unsafe chars.\n */\nconst UNSAFE_OBJECT_KEY_NAME_REGEXP = /[-.]/;\n\n/** Name of the temporary to use during data binding */\nexport const TEMPORARY_NAME = '_t';\n\n/** Name of the context parameter passed into a template function */\nexport const CONTEXT_NAME = 'ctx';\n\n/** Name of the RenderFlag passed into a template function */\nexport const RENDER_FLAGS = 'rf';\n\n/** The prefix reference variables */\nexport const REFERENCE_PREFIX = '_r';\n\n/** The name of the implicit context reference */\nexport const IMPLICIT_REFERENCE = '$implicit';\n\n/** Non bindable attribute name **/\nexport const NON_BINDABLE_ATTR = 'ngNonBindable';\n\n/** Name for the variable keeping track of the context returned by `ɵɵrestoreView`. */\nexport const RESTORED_VIEW_CONTEXT_NAME = 'restoredCtx';\n\n/**\n * Creates an allocator for a temporary variable.\n *\n * A variable declaration is added to the statements the first time the allocator is invoked.\n */\nexport function temporaryAllocator(statements: o.Statement[], name: string): () => o.ReadVarExpr {\n  let temp: o.ReadVarExpr|null = null;\n  return () => {\n    if (!temp) {\n      statements.push(new o.DeclareVarStmt(TEMPORARY_NAME, undefined, o.DYNAMIC_TYPE));\n      temp = o.variable(name);\n    }\n    return temp;\n  };\n}\n\n\nexport function unsupported(this: void|Function, feature: string): never {\n  if (this) {\n    throw new Error(`Builder ${this.constructor.name} doesn't support ${feature} yet`);\n  }\n  throw new Error(`Feature ${feature} is not supported yet`);\n}\n\nexport function invalid<T>(this: t.Visitor, arg: o.Expression|o.Statement|t.Node): never {\n  throw new Error(\n      `Invalid state: Visitor ${this.constructor.name} doesn't handle ${arg.constructor.name}`);\n}\n\nexport function asLiteral(value: any): o.Expression {\n  if (Array.isArray(value)) {\n    return o.literalArr(value.map(asLiteral));\n  }\n  return o.literal(value, o.INFERRED_TYPE);\n}\n\nexport function conditionallyCreateMapObjectLiteral(\n    keys: {[key: string]: string|string[]}, keepDeclared?: boolean): o.Expression|null {\n  if (Object.getOwnPropertyNames(keys).length > 0) {\n    return mapToExpression(keys, keepDeclared);\n  }\n  return null;\n}\n\nfunction mapToExpression(\n    map: {[key: string]: string|string[]}, keepDeclared?: boolean): o.Expression {\n  return o.literalMap(Object.getOwnPropertyNames(map).map(key => {\n    // canonical syntax: `dirProp: publicProp`\n    // if there is no `:`, use dirProp = elProp\n    const value = map[key];\n    let declaredName: string;\n    let publicName: string;\n    let minifiedName: string;\n    let needsDeclaredName: boolean;\n    if (Array.isArray(value)) {\n      [publicName, declaredName] = value;\n      minifiedName = key;\n      needsDeclaredName = publicName !== declaredName;\n    } else {\n      [declaredName, publicName] = splitAtColon(key, [key, value]);\n      minifiedName = declaredName;\n      // Only include the declared name if extracted from the key, i.e. the key contains a colon.\n      // Otherwise the declared name should be omitted even if it is different from the public name,\n      // as it may have already been minified.\n      needsDeclaredName = publicName !== declaredName && key.includes(':');\n    }\n    return {\n      key: minifiedName,\n      // put quotes around keys that contain potentially unsafe characters\n      quoted: UNSAFE_OBJECT_KEY_NAME_REGEXP.test(minifiedName),\n      value: (keepDeclared && needsDeclaredName) ?\n          o.literalArr([asLiteral(publicName), asLiteral(declaredName)]) :\n          asLiteral(publicName)\n    };\n  }));\n}\n\n/**\n *  Remove trailing null nodes as they are implied.\n */\nexport function trimTrailingNulls(parameters: o.Expression[]): o.Expression[] {\n  while (o.isNull(parameters[parameters.length - 1])) {\n    parameters.pop();\n  }\n  return parameters;\n}\n\nexport function getQueryPredicate(\n    query: R3QueryMetadata, constantPool: ConstantPool): o.Expression {\n  if (Array.isArray(query.predicate)) {\n    let predicate: o.Expression[] = [];\n    query.predicate.forEach((selector: string): void => {\n      // Each item in predicates array may contain strings with comma-separated refs\n      // (for ex. 'ref, ref1, ..., refN'), thus we extract individual refs and store them\n      // as separate array entities\n      const selectors = selector.split(',').map(token => o.literal(token.trim()));\n      predicate.push(...selectors);\n    });\n    return constantPool.getConstLiteral(o.literalArr(predicate), true);\n  } else {\n    return query.predicate;\n  }\n}\n\n/**\n * A representation for an object literal used during codegen of definition objects. The generic\n * type `T` allows to reference a documented type of the generated structure, such that the\n * property names that are set can be resolved to their documented declaration.\n */\nexport class DefinitionMap<T = any> {\n  values: {key: string, quoted: boolean, value: o.Expression}[] = [];\n\n  set(key: keyof T, value: o.Expression|null): void {\n    if (value) {\n      this.values.push({key: key as string, value, quoted: false});\n    }\n  }\n\n  toLiteralMap(): o.LiteralMapExpr {\n    return o.literalMap(this.values);\n  }\n}\n\n/**\n * Extract a map of properties to values for a given element or template node, which can be used\n * by the directive matching machinery.\n *\n * @param elOrTpl the element or template in question\n * @return an object set up for directive matching. For attributes on the element/template, this\n * object maps a property name to its (static) value. For any bindings, this map simply maps the\n * property name to an empty string.\n */\nexport function getAttrsForDirectiveMatching(elOrTpl: t.Element|\n                                             t.Template): {[name: string]: string} {\n  const attributesMap: {[name: string]: string} = {};\n\n\n  if (elOrTpl instanceof t.Template && elOrTpl.tagName !== 'ng-template') {\n    elOrTpl.templateAttrs.forEach(a => attributesMap[a.name] = '');\n  } else {\n    elOrTpl.attributes.forEach(a => {\n      if (!isI18nAttribute(a.name)) {\n        attributesMap[a.name] = a.value;\n      }\n    });\n\n    elOrTpl.inputs.forEach(i => {\n      attributesMap[i.name] = '';\n    });\n    elOrTpl.outputs.forEach(o => {\n      attributesMap[o.name] = '';\n    });\n  }\n\n  return attributesMap;\n}\n\n/** Returns a call expression to a chained instruction, e.g. `property(params[0])(params[1])`. */\nexport function chainedInstruction(\n    reference: o.ExternalReference, calls: o.Expression[][], span?: ParseSourceSpan|null) {\n  let expression = o.importExpr(reference, null, span) as o.Expression;\n\n  if (calls.length > 0) {\n    for (let i = 0; i < calls.length; i++) {\n      expression = expression.callFn(calls[i], span);\n    }\n  } else {\n    // Add a blank invocation, in case the `calls` array is empty.\n    expression = expression.callFn([], span);\n  }\n\n  return expression;\n}\n\n/**\n * Gets the number of arguments expected to be passed to a generated instruction in the case of\n * interpolation instructions.\n * @param interpolation An interpolation ast\n */\nexport function getInterpolationArgsLength(interpolation: Interpolation) {\n  const {expressions, strings} = interpolation;\n  if (expressions.length === 1 && strings.length === 2 && strings[0] === '' && strings[1] === '') {\n    // If the interpolation has one interpolated value, but the prefix and suffix are both empty\n    // strings, we only pass one argument, to a special instruction like `propertyInterpolate` or\n    // `textInterpolate`.\n    return 1;\n  } else {\n    return expressions.length + strings.length;\n  }\n}\n"]} |
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