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 | (function (factory) {
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9 | if (typeof module === "object" && typeof module.exports === "object") {
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10 | var v = factory(require, exports);
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11 | if (v !== undefined) module.exports = v;
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12 | }
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13 | else if (typeof define === "function" && define.amd) {
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14 | define("@angular/language-service/src/ts_utils", ["require", "exports", "tslib", "typescript/lib/tsserverlibrary"], factory);
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15 | }
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16 | })(function (require, exports) {
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17 | ;
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18 | Object.defineProperty(exports, "__esModule", { value: true });
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19 | exports.findPropertyValueOfType = exports.getDirectiveClassLike = exports.getClassDeclFromDecoratorProp = exports.getPropertyAssignmentFromValue = exports.findTightestNode = void 0;
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20 | var tslib_1 = require("tslib");
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21 | var ts = require("typescript/lib/tsserverlibrary");
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22 | /**
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23 | * Return the node that most tightly encompass the specified `position`.
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24 | * @param node
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25 | * @param position
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26 | */
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27 | function findTightestNode(node, position) {
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28 | if (node.getStart() <= position && position < node.getEnd()) {
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29 | return node.forEachChild(function (c) { return findTightestNode(c, position); }) || node;
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30 | }
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31 | }
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32 | exports.findTightestNode = findTightestNode;
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33 | /**
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34 | * Returns a property assignment from the assignment value if the property name
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35 | * matches the specified `key`, or `undefined` if there is no match.
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36 | */
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37 | function getPropertyAssignmentFromValue(value, key) {
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38 | var propAssignment = value.parent;
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39 | if (!propAssignment || !ts.isPropertyAssignment(propAssignment) ||
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40 | propAssignment.name.getText() !== key) {
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41 | return;
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42 | }
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43 | return propAssignment;
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44 | }
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45 | exports.getPropertyAssignmentFromValue = getPropertyAssignmentFromValue;
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46 | /**
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47 | * Given a decorator property assignment, return the ClassDeclaration node that corresponds to the
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48 | * directive class the property applies to.
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49 | * If the property assignment is not on a class decorator, no declaration is returned.
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50 | *
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51 | * For example,
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52 | *
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53 | * @Component({
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54 | * template: '<div></div>'
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55 | * ^^^^^^^^^^^^^^^^^^^^^^^---- property assignment
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56 | * })
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57 | * class AppComponent {}
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58 | * ^---- class declaration node
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59 | *
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60 | * @param propAsgn property assignment
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61 | */
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62 | function getClassDeclFromDecoratorProp(propAsgnNode) {
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63 | if (!propAsgnNode.parent || !ts.isObjectLiteralExpression(propAsgnNode.parent)) {
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64 | return;
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65 | }
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66 | var objLitExprNode = propAsgnNode.parent;
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67 | if (!objLitExprNode.parent || !ts.isCallExpression(objLitExprNode.parent)) {
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68 | return;
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69 | }
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70 | var callExprNode = objLitExprNode.parent;
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71 | if (!callExprNode.parent || !ts.isDecorator(callExprNode.parent)) {
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72 | return;
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73 | }
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74 | var decorator = callExprNode.parent;
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75 | if (!decorator.parent || !ts.isClassDeclaration(decorator.parent)) {
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76 | return;
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77 | }
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78 | var classDeclNode = decorator.parent;
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79 | return classDeclNode;
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80 | }
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81 | exports.getClassDeclFromDecoratorProp = getClassDeclFromDecoratorProp;
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82 | /**
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83 | * Return metadata about `node` if it looks like an Angular directive class.
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84 | * In this case, potential matches are `@NgModule`, `@Component`, `@Directive`,
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85 | * `@Pipe`, etc.
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86 | * These class declarations all share some common attributes, namely their
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87 | * decorator takes exactly one parameter and the parameter must be an object
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88 | * literal.
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89 | *
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90 | * For example,
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91 | * v---------- `decoratorId`
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92 | * @NgModule({ <
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93 | * declarations: [], < classDecln-al
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94 | * }) <
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95 | * class AppModule {} <
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96 | * ^----- `classId`
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97 | *
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98 | * @param node Potential node that represents an Angular directive.
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99 | */
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100 | function getDirectiveClassLike(node) {
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101 | var e_1, _a;
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102 | if (!ts.isClassDeclaration(node) || !node.name || !node.decorators) {
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103 | return;
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104 | }
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105 | try {
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106 | for (var _b = tslib_1.__values(node.decorators), _c = _b.next(); !_c.done; _c = _b.next()) {
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107 | var d = _c.value;
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108 | var expr = d.expression;
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109 | if (!ts.isCallExpression(expr) || expr.arguments.length !== 1 ||
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110 | !ts.isIdentifier(expr.expression)) {
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111 | continue;
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112 | }
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113 | var arg = expr.arguments[0];
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114 | if (ts.isObjectLiteralExpression(arg)) {
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115 | return {
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116 | decoratorId: expr.expression,
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117 | classId: node.name,
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118 | };
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119 | }
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120 | }
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121 | }
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122 | catch (e_1_1) { e_1 = { error: e_1_1 }; }
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123 | finally {
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124 | try {
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125 | if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
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126 | }
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127 | finally { if (e_1) throw e_1.error; }
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128 | }
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129 | }
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130 | exports.getDirectiveClassLike = getDirectiveClassLike;
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131 | /**
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132 | * Finds the value of a property assignment that is nested in a TypeScript node and is of a certain
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133 | * type T.
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134 | *
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135 | * @param startNode node to start searching for nested property assignment from
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136 | * @param propName property assignment name
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137 | * @param predicate function to verify that a node is of type T.
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138 | * @return node property assignment value of type T, or undefined if none is found
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139 | */
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140 | function findPropertyValueOfType(startNode, propName, predicate) {
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141 | if (ts.isPropertyAssignment(startNode) && startNode.name.getText() === propName) {
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142 | var initializer = startNode.initializer;
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143 | if (predicate(initializer))
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144 | return initializer;
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145 | }
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146 | return startNode.forEachChild(function (c) { return findPropertyValueOfType(c, propName, predicate); });
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147 | }
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148 | exports.findPropertyValueOfType = findPropertyValueOfType;
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149 | });
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 // decorator identifier, like @Component\n  classId: ts.Identifier;\n}\n\n/**\n * Return metadata about `node` if it looks like an Angular directive class.\n * In this case, potential matches are `@NgModule`, `@Component`, `@Directive`,\n * `@Pipe`, etc.\n * These class declarations all share some common attributes, namely their\n * decorator takes exactly one parameter and the parameter must be an object\n * literal.\n *\n * For example,\n *     v---------- `decoratorId`\n * @NgModule({           <\n *   declarations: [],   < classDecln-al\n * })                    <\n * class AppModule {}    <\n *          ^----- `classId`\n *\n * @param node Potential node that represents an Angular directive.\n */\nexport function getDirectiveClassLike(node: ts.Node): DirectiveClassLike|undefined {\n  if (!ts.isClassDeclaration(node) || !node.name || !node.decorators) {\n    return;\n  }\n  for (const d of node.decorators) {\n    const expr = d.expression;\n    if (!ts.isCallExpression(expr) || expr.arguments.length !== 1 ||\n        !ts.isIdentifier(expr.expression)) {\n      continue;\n    }\n    const arg = expr.arguments[0];\n    if (ts.isObjectLiteralExpression(arg)) {\n      return {\n        decoratorId: expr.expression,\n        classId: node.name,\n      };\n    }\n  }\n}\n\n/**\n * Finds the value of a property assignment that is nested in a TypeScript node and is of a certain\n * type T.\n *\n * @param startNode node to start searching for nested property assignment from\n * @param propName property assignment name\n * @param predicate function to verify that a node is of type T.\n * @return node property assignment value of type T, or undefined if none is found\n */\nexport function findPropertyValueOfType<T extends ts.Node>(\n    startNode: ts.Node, propName: string, predicate: (node: ts.Node) => node is T): T|undefined {\n  if (ts.isPropertyAssignment(startNode) && startNode.name.getText() === propName) {\n    const {initializer} = startNode;\n    if (predicate(initializer)) return initializer;\n  }\n  return startNode.forEachChild(c => findPropertyValueOfType(c, propName, predicate));\n}\n"]} |
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