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/definitions", ["require", "exports", "tslib", "path", "typescript", "@angular/language-service/src/locate_symbol", "@angular/language-service/src/ts_utils"], 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.getTsDefinitionAndBoundSpan = exports.getDefinitionAndBoundSpan = void 0;
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20 | var tslib_1 = require("tslib");
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21 | var path = require("path");
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22 | var ts = require("typescript"); // used as value and is provided at runtime
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23 | var locate_symbol_1 = require("@angular/language-service/src/locate_symbol");
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24 | var ts_utils_1 = require("@angular/language-service/src/ts_utils");
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25 | /**
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26 | * Convert Angular Span to TypeScript TextSpan. Angular Span has 'start' and
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27 | * 'end' whereas TS TextSpan has 'start' and 'length'.
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28 | * @param span Angular Span
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29 | */
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30 | function ngSpanToTsTextSpan(span) {
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31 | return {
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32 | start: span.start,
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33 | length: span.end - span.start,
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34 | };
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35 | }
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36 | /**
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37 | * Traverse the template AST and look for the symbol located at `position`, then
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38 | * return its definition and span of bound text.
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39 | * @param info
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40 | * @param position
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41 | */
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42 | function getDefinitionAndBoundSpan(info, position) {
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43 | var e_1, _a, e_2, _b;
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44 | var symbols = locate_symbol_1.locateSymbols(info, position);
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45 | if (!symbols.length) {
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46 | return;
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47 | }
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48 | var seen = new Set();
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49 | var definitions = [];
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50 | try {
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51 | for (var symbols_1 = tslib_1.__values(symbols), symbols_1_1 = symbols_1.next(); !symbols_1_1.done; symbols_1_1 = symbols_1.next()) {
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52 | var symbolInfo = symbols_1_1.value;
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53 | var symbol = symbolInfo.symbol;
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54 | // symbol.definition is really the locations of the symbol. There could be
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55 | // more than one. No meaningful info could be provided without any location.
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56 | var kind = symbol.kind, name_1 = symbol.name, container = symbol.container, locations = symbol.definition;
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57 | if (!locations || !locations.length) {
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58 | continue;
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59 | }
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60 | var containerKind = container ? container.kind : ts.ScriptElementKind.unknown;
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61 | var containerName = container ? container.name : '';
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62 | try {
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63 | for (var locations_1 = (e_2 = void 0, tslib_1.__values(locations)), locations_1_1 = locations_1.next(); !locations_1_1.done; locations_1_1 = locations_1.next()) {
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64 | var _c = locations_1_1.value, fileName = _c.fileName, span = _c.span;
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65 | var textSpan = ngSpanToTsTextSpan(span);
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66 | // In cases like two-way bindings, a request for the definitions of an expression may return
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67 | // two of the same definition:
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68 | // [(ngModel)]="prop"
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69 | // ^^^^ -- one definition for the property binding, one for the event binding
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70 | // To prune duplicate definitions, tag definitions with unique location signatures and ignore
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71 | // definitions whose locations have already been seen.
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72 | var signature = textSpan.start + ":" + textSpan.length + "@" + fileName;
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73 | if (seen.has(signature))
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74 | continue;
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75 | definitions.push({
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76 | kind: kind,
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77 | name: name_1,
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78 | containerKind: containerKind,
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79 | containerName: containerName,
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80 | textSpan: ngSpanToTsTextSpan(span),
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81 | fileName: fileName,
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82 | });
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83 | seen.add(signature);
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84 | }
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85 | }
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86 | catch (e_2_1) { e_2 = { error: e_2_1 }; }
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87 | finally {
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88 | try {
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89 | if (locations_1_1 && !locations_1_1.done && (_b = locations_1.return)) _b.call(locations_1);
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90 | }
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91 | finally { if (e_2) throw e_2.error; }
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92 | }
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93 | }
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94 | }
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95 | catch (e_1_1) { e_1 = { error: e_1_1 }; }
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96 | finally {
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97 | try {
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98 | if (symbols_1_1 && !symbols_1_1.done && (_a = symbols_1.return)) _a.call(symbols_1);
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99 | }
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100 | finally { if (e_1) throw e_1.error; }
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101 | }
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102 | return {
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103 | definitions: definitions,
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104 | textSpan: symbols[0].span,
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105 | };
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106 | }
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107 | exports.getDefinitionAndBoundSpan = getDefinitionAndBoundSpan;
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108 | /**
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109 | * Gets an Angular-specific definition in a TypeScript source file.
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110 | */
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111 | function getTsDefinitionAndBoundSpan(sf, position, tsLsHost) {
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112 | var node = ts_utils_1.findTightestNode(sf, position);
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113 | if (!node)
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114 | return;
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115 | switch (node.kind) {
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116 | case ts.SyntaxKind.StringLiteral:
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117 | case ts.SyntaxKind.NoSubstitutionTemplateLiteral:
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118 | // Attempt to extract definition of a URL in a property assignment.
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119 | return getUrlFromProperty(node, tsLsHost);
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120 | default:
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121 | return undefined;
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122 | }
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123 | }
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124 | exports.getTsDefinitionAndBoundSpan = getTsDefinitionAndBoundSpan;
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125 | /**
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126 | * Attempts to get the definition of a file whose URL is specified in a property assignment in a
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127 | * directive decorator.
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128 | * Currently applies to `templateUrl` and `styleUrls` properties.
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129 | */
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130 | function getUrlFromProperty(urlNode, tsLsHost) {
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131 | // Get the property assignment node corresponding to the `templateUrl` or `styleUrls` assignment.
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132 | // These assignments are specified differently; `templateUrl` is a string, and `styleUrls` is
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133 | // an array of strings:
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134 | // {
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135 | // templateUrl: './template.ng.html',
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136 | // styleUrls: ['./style.css', './other-style.css']
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137 | // }
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138 | // `templateUrl`'s property assignment can be found from the string literal node;
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139 | // `styleUrls`'s property assignment can be found from the array (parent) node.
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140 | //
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141 | // First search for `templateUrl`.
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142 | var asgn = ts_utils_1.getPropertyAssignmentFromValue(urlNode, 'templateUrl');
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143 | if (!asgn) {
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144 | // `templateUrl` assignment not found; search for `styleUrls` array assignment.
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145 | asgn = ts_utils_1.getPropertyAssignmentFromValue(urlNode.parent, 'styleUrls');
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146 | if (!asgn) {
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147 | // Nothing found, bail.
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148 | return;
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149 | }
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150 | }
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151 | // If the property assignment is not a property of a class decorator, don't generate definitions
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152 | // for it.
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153 | if (!ts_utils_1.getClassDeclFromDecoratorProp(asgn)) {
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154 | return;
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155 | }
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156 | var sf = urlNode.getSourceFile();
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157 | // Extract url path specified by the url node, which is relative to the TypeScript source file
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158 | // the url node is defined in.
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159 | var url = path.join(path.dirname(sf.fileName), urlNode.text);
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160 | // If the file does not exist, bail. It is possible that the TypeScript language service host
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161 | // does not have a `fileExists` method, in which case optimistically assume the file exists.
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162 | if (tsLsHost.fileExists && !tsLsHost.fileExists(url))
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163 | return;
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164 | var templateDefinitions = [{
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165 | kind: ts.ScriptElementKind.externalModuleName,
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166 | name: url,
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167 | containerKind: ts.ScriptElementKind.unknown,
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168 | containerName: '',
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169 | // Reading the template is expensive, so don't provide a preview.
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170 | textSpan: { start: 0, length: 0 },
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171 | fileName: url,
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172 | }];
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173 | return {
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174 | definitions: templateDefinitions,
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175 | textSpan: {
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176 | // Exclude opening and closing quotes in the url span.
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177 | start: urlNode.getStart() + 1,
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178 | length: urlNode.getWidth() - 2,
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179 | },
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180 | };
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181 | }
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182 | });
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Angular Span has 'start' and\n * 'end' whereas TS TextSpan has 'start' and 'length'.\n * @param span Angular Span\n */\nfunction ngSpanToTsTextSpan(span: Span): ts.TextSpan {\n  return {\n    start: span.start,\n    length: span.end - span.start,\n  };\n}\n\n/**\n * Traverse the template AST and look for the symbol located at `position`, then\n * return its definition and span of bound text.\n * @param info\n * @param position\n */\nexport function getDefinitionAndBoundSpan(\n    info: AstResult, position: number): ts.DefinitionInfoAndBoundSpan|undefined {\n  const symbols = locateSymbols(info, position);\n  if (!symbols.length) {\n    return;\n  }\n\n  const seen = new Set<string>();\n  const definitions: ts.DefinitionInfo[] = [];\n  for (const symbolInfo of symbols) {\n    const {symbol} = symbolInfo;\n\n    // symbol.definition is really the locations of the symbol. There could be\n    // more than one. No meaningful info could be provided without any location.\n    const {kind, name, container, definition: locations} = symbol;\n    if (!locations || !locations.length) {\n      continue;\n    }\n\n    const containerKind =\n        container ? container.kind as ts.ScriptElementKind : ts.ScriptElementKind.unknown;\n    const containerName = container ? container.name : '';\n\n    for (const {fileName, span} of locations) {\n      const textSpan = ngSpanToTsTextSpan(span);\n      // In cases like two-way bindings, a request for the definitions of an expression may return\n      // two of the same definition:\n      //    [(ngModel)]=\"prop\"\n      //                 ^^^^  -- one definition for the property binding, one for the event binding\n      // To prune duplicate definitions, tag definitions with unique location signatures and ignore\n      // definitions whose locations have already been seen.\n      const signature = `${textSpan.start}:${textSpan.length}@${fileName}`;\n      if (seen.has(signature)) continue;\n\n      definitions.push({\n        kind: kind as ts.ScriptElementKind,\n        name,\n        containerKind,\n        containerName,\n        textSpan: ngSpanToTsTextSpan(span),\n        fileName: fileName,\n      });\n      seen.add(signature);\n    }\n  }\n\n  return {\n    definitions,\n    textSpan: symbols[0].span,\n  };\n}\n\n/**\n * Gets an Angular-specific definition in a TypeScript source file.\n */\nexport function getTsDefinitionAndBoundSpan(\n    sf: ts.SourceFile, position: number,\n    tsLsHost: Readonly<ts.LanguageServiceHost>): ts.DefinitionInfoAndBoundSpan|undefined {\n  const node = findTightestNode(sf, position);\n  if (!node) return;\n  switch (node.kind) {\n    case ts.SyntaxKind.StringLiteral:\n    case ts.SyntaxKind.NoSubstitutionTemplateLiteral:\n      // Attempt to extract definition of a URL in a property assignment.\n      return getUrlFromProperty(node as ts.StringLiteralLike, tsLsHost);\n    default:\n      return undefined;\n  }\n}\n\n/**\n * Attempts to get the definition of a file whose URL is specified in a property assignment in a\n * directive decorator.\n * Currently applies to `templateUrl` and `styleUrls` properties.\n */\nfunction getUrlFromProperty(\n    urlNode: ts.StringLiteralLike,\n    tsLsHost: Readonly<ts.LanguageServiceHost>): ts.DefinitionInfoAndBoundSpan|undefined {\n  // Get the property assignment node corresponding to the `templateUrl` or `styleUrls` assignment.\n  // These assignments are specified differently; `templateUrl` is a string, and `styleUrls` is\n  // an array of strings:\n  //   {\n  //        templateUrl: './template.ng.html',\n  //        styleUrls: ['./style.css', './other-style.css']\n  //   }\n  // `templateUrl`'s property assignment can be found from the string literal node;\n  // `styleUrls`'s property assignment can be found from the array (parent) node.\n  //\n  // First search for `templateUrl`.\n  let asgn = getPropertyAssignmentFromValue(urlNode, 'templateUrl');\n  if (!asgn) {\n    // `templateUrl` assignment not found; search for `styleUrls` array assignment.\n    asgn = getPropertyAssignmentFromValue(urlNode.parent, 'styleUrls');\n    if (!asgn) {\n      // Nothing found, bail.\n      return;\n    }\n  }\n\n  // If the property assignment is not a property of a class decorator, don't generate definitions\n  // for it.\n  if (!getClassDeclFromDecoratorProp(asgn)) {\n    return;\n  }\n\n  const sf = urlNode.getSourceFile();\n  // Extract url path specified by the url node, which is relative to the TypeScript source file\n  // the url node is defined in.\n  const url = path.join(path.dirname(sf.fileName), urlNode.text);\n\n  // If the file does not exist, bail. It is possible that the TypeScript language service host\n  // does not have a `fileExists` method, in which case optimistically assume the file exists.\n  if (tsLsHost.fileExists && !tsLsHost.fileExists(url)) return;\n\n  const templateDefinitions: ts.DefinitionInfo[] = [{\n    kind: ts.ScriptElementKind.externalModuleName,\n    name: url,\n    containerKind: ts.ScriptElementKind.unknown,\n    containerName: '',\n    // Reading the template is expensive, so don't provide a preview.\n    textSpan: {start: 0, length: 0},\n    fileName: url,\n  }];\n\n  return {\n    definitions: templateDefinitions,\n    textSpan: {\n      // Exclude opening and closing quotes in the url span.\n      start: urlNode.getStart() + 1,\n      length: urlNode.getWidth() - 2,\n    },\n  };\n}\n"]} |
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