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/locate_symbol", ["require", "exports", "tslib", "@angular/compiler", "typescript/lib/tsserverlibrary", "@angular/language-service/src/expression_diagnostics", "@angular/language-service/src/expressions", "@angular/language-service/src/types", "@angular/language-service/src/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.locateSymbols = void 0;
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20 | var tslib_1 = require("tslib");
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21 | var compiler_1 = require("@angular/compiler");
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22 | var tss = require("typescript/lib/tsserverlibrary");
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23 | var expression_diagnostics_1 = require("@angular/language-service/src/expression_diagnostics");
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24 | var expressions_1 = require("@angular/language-service/src/expressions");
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25 | var types_1 = require("@angular/language-service/src/types");
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26 | var utils_1 = require("@angular/language-service/src/utils");
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27 | /**
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28 | * Traverses a template AST and locates symbol(s) at a specified position.
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29 | * @param info template AST information set
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30 | * @param position location to locate symbols at
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31 | */
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32 | function locateSymbols(info, position) {
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33 | var templatePosition = position - info.template.span.start;
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34 | // TODO: update `findTemplateAstAt` to use absolute positions.
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35 | var path = utils_1.findTemplateAstAt(info.templateAst, templatePosition);
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36 | var attribute = findAttribute(info, position);
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37 | if (!path.tail)
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38 | return [];
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39 | var narrowest = utils_1.spanOf(path.tail);
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40 | var toVisit = [];
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41 | for (var node = path.tail; node && utils_1.isNarrower(utils_1.spanOf(node.sourceSpan), narrowest); node = path.parentOf(node)) {
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42 | toVisit.push(node);
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43 | }
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44 | // For the structural directive, only care about the last template AST.
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45 | if (attribute === null || attribute === void 0 ? void 0 : attribute.name.startsWith('*')) {
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46 | toVisit.splice(0, toVisit.length - 1);
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47 | }
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48 | return toVisit.map(function (ast) { return locateSymbol(ast, path, info); })
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49 | .filter(function (sym) { return sym !== undefined; });
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50 | }
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51 | exports.locateSymbols = locateSymbols;
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52 | /**
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53 | * Visits a template node and locates the symbol in that node at a path position.
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54 | * @param ast template AST node to visit
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55 | * @param path non-empty set of narrowing AST nodes at a position
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56 | * @param info template AST information set
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57 | */
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58 | function locateSymbol(ast, path, info) {
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59 | var templatePosition = path.position;
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60 | var position = templatePosition + info.template.span.start;
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61 | var symbol;
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62 | var span;
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63 | var staticSymbol;
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64 | var attributeValueSymbol = function (ast) {
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65 | var attribute = findAttribute(info, position);
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66 | if (attribute) {
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67 | if (utils_1.inSpan(templatePosition, utils_1.spanOf(attribute.valueSpan))) {
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68 | var result = void 0;
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69 | if (attribute.name.startsWith('*')) {
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70 | result = getSymbolInMicrosyntax(info, path, attribute);
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71 | }
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72 | else {
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73 | var dinfo = utils_1.diagnosticInfoFromTemplateInfo(info);
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74 | var scope = expression_diagnostics_1.getExpressionScope(dinfo, path);
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75 | result = expressions_1.getExpressionSymbol(scope, ast, templatePosition, info.template);
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76 | }
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77 | if (result) {
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78 | symbol = result.symbol;
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79 | span = utils_1.offsetSpan(result.span, attribute.valueSpan.start.offset);
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80 | }
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81 | return true;
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82 | }
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83 | }
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84 | return false;
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85 | };
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86 | ast.visit({
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87 | visitNgContent: function (_ast) { },
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88 | visitEmbeddedTemplate: function (_ast) { },
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89 | visitElement: function (ast) {
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90 | var component = ast.directives.find(function (d) { return d.directive.isComponent; });
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91 | if (component) {
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92 | // Need to cast because 'reference' is typed as any
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93 | staticSymbol = component.directive.type.reference;
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94 | symbol = info.template.query.getTypeSymbol(staticSymbol);
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95 | symbol = symbol && new OverrideKindSymbol(symbol, types_1.DirectiveKind.COMPONENT);
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96 | span = utils_1.spanOf(ast);
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97 | }
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98 | else {
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99 | // Find a directive that matches the element name
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100 | var directive = ast.directives.find(function (d) { return d.directive.selector != null && d.directive.selector.indexOf(ast.name) >= 0; });
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101 | if (directive) {
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102 | // Need to cast because 'reference' is typed as any
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103 | staticSymbol = directive.directive.type.reference;
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104 | symbol = info.template.query.getTypeSymbol(staticSymbol);
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105 | symbol = symbol && new OverrideKindSymbol(symbol, types_1.DirectiveKind.DIRECTIVE);
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106 | span = utils_1.spanOf(ast);
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107 | }
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108 | }
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109 | },
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110 | visitReference: function (ast) {
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111 | symbol = ast.value && info.template.query.getTypeSymbol(compiler_1.tokenReference(ast.value));
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112 | span = utils_1.spanOf(ast);
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113 | },
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114 | visitVariable: function (_ast) { },
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115 | visitEvent: function (ast) {
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116 | if (!attributeValueSymbol(ast.handler)) {
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117 | symbol = utils_1.findOutputBinding(ast, path, info.template.query);
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118 | symbol = symbol && new OverrideKindSymbol(symbol, types_1.DirectiveKind.EVENT);
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119 | span = utils_1.spanOf(ast);
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120 | }
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121 | },
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122 | visitElementProperty: function (ast) {
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123 | attributeValueSymbol(ast.value);
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124 | },
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125 | visitAttr: function (ast) {
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126 | var e_1, _a;
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127 | var element = path.first(compiler_1.ElementAst);
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128 | if (!element)
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129 | return;
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130 | // Create a mapping of all directives applied to the element from their selectors.
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131 | var matcher = new compiler_1.SelectorMatcher();
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132 | try {
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133 | for (var _b = tslib_1.__values(element.directives), _c = _b.next(); !_c.done; _c = _b.next()) {
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134 | var dir = _c.value;
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135 | if (!dir.directive.selector)
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136 | continue;
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137 | matcher.addSelectables(compiler_1.CssSelector.parse(dir.directive.selector), dir);
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138 | }
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139 | }
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140 | catch (e_1_1) { e_1 = { error: e_1_1 }; }
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141 | finally {
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142 | try {
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143 | if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
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144 | }
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145 | finally { if (e_1) throw e_1.error; }
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146 | }
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147 | // See if this attribute matches the selector of any directive on the element.
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148 | var attributeSelector = "[" + ast.name + "=" + ast.value + "]";
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149 | var parsedAttribute = compiler_1.CssSelector.parse(attributeSelector);
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150 | if (!parsedAttribute.length)
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151 | return;
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152 | matcher.match(parsedAttribute[0], function (_, _a) {
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153 | var directive = _a.directive;
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154 | // Need to cast because 'reference' is typed as any
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155 | staticSymbol = directive.type.reference;
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156 | symbol = info.template.query.getTypeSymbol(staticSymbol);
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157 | symbol = symbol && new OverrideKindSymbol(symbol, types_1.DirectiveKind.DIRECTIVE);
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158 | span = utils_1.spanOf(ast);
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159 | });
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160 | },
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161 | visitBoundText: function (ast) {
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162 | var expressionPosition = templatePosition - ast.sourceSpan.start.offset;
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163 | if (utils_1.inSpan(expressionPosition, ast.value.span)) {
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164 | var dinfo = utils_1.diagnosticInfoFromTemplateInfo(info);
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165 | var scope = expression_diagnostics_1.getExpressionScope(dinfo, path);
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166 | var result = expressions_1.getExpressionSymbol(scope, ast.value, templatePosition, info.template);
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167 | if (result) {
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168 | symbol = result.symbol;
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169 | span = utils_1.offsetSpan(result.span, ast.sourceSpan.start.offset);
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170 | }
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171 | }
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172 | },
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173 | visitText: function (_ast) { },
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174 | visitDirective: function (ast) {
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175 | // Need to cast because 'reference' is typed as any
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176 | staticSymbol = ast.directive.type.reference;
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177 | symbol = info.template.query.getTypeSymbol(staticSymbol);
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178 | span = utils_1.spanOf(ast);
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179 | },
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180 | visitDirectiveProperty: function (ast) {
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181 | if (!attributeValueSymbol(ast.value)) {
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182 | var directive = findParentOfBinding(info.templateAst, ast, templatePosition);
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183 | var attribute = findAttribute(info, position);
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184 | if (directive && attribute) {
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185 | if (attribute.name.startsWith('*')) {
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186 | var compileTypeSummary = directive.directive;
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187 | symbol = info.template.query.getTypeSymbol(compileTypeSummary.type.reference);
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188 | symbol = symbol && new OverrideKindSymbol(symbol, types_1.DirectiveKind.DIRECTIVE);
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189 | // Use 'attribute.sourceSpan' instead of the directive's,
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190 | // because the span of the directive is the whole opening tag of an element.
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191 | span = utils_1.spanOf(attribute.sourceSpan);
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192 | }
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193 | else {
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194 | symbol = findInputBinding(info, ast.templateName, directive);
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195 | span = utils_1.spanOf(ast);
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196 | }
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197 | }
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198 | }
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199 | }
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200 | }, null);
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201 | if (symbol && span) {
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202 | var _a = utils_1.offsetSpan(span, info.template.span.start), start = _a.start, end = _a.end;
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203 | return {
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204 | symbol: symbol,
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205 | span: tss.createTextSpanFromBounds(start, end),
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206 | staticSymbol: staticSymbol,
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207 | };
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208 | }
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209 | }
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210 | // Get the symbol in microsyntax at template position.
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211 | function getSymbolInMicrosyntax(info, path, attribute) {
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212 | var e_2, _a;
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213 | var _b;
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214 | if (!attribute.valueSpan) {
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215 | return;
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216 | }
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217 | var absValueOffset = attribute.valueSpan.start.offset;
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218 | var result;
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219 | var templateBindings = info.expressionParser.parseTemplateBindings(attribute.name, attribute.value, attribute.sourceSpan.toString(), attribute.sourceSpan.start.offset, attribute.valueSpan.start.offset).templateBindings;
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220 | try {
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221 | // Find the symbol that contains the position.
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222 | for (var templateBindings_1 = tslib_1.__values(templateBindings), templateBindings_1_1 = templateBindings_1.next(); !templateBindings_1_1.done; templateBindings_1_1 = templateBindings_1.next()) {
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223 | var tb = templateBindings_1_1.value;
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224 | if (tb instanceof compiler_1.VariableBinding) {
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225 | // TODO(kyliau): if binding is variable we should still look for the value
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226 | // of the key. For example, "let i=index" => "index" should point to
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227 | // NgForOfContext.index
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228 | continue;
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229 | }
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230 | if (utils_1.inSpan(path.position, (_b = tb.value) === null || _b === void 0 ? void 0 : _b.ast.sourceSpan)) {
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231 | var dinfo = utils_1.diagnosticInfoFromTemplateInfo(info);
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232 | var scope = expression_diagnostics_1.getExpressionScope(dinfo, path);
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233 | result = expressions_1.getExpressionSymbol(scope, tb.value, path.position, info.template);
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234 | }
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235 | else if (utils_1.inSpan(path.position, tb.sourceSpan)) {
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236 | var template = path.first(compiler_1.EmbeddedTemplateAst);
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237 | if (template) {
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238 | // One element can only have one template binding.
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239 | var directiveAst = template.directives[0];
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240 | if (directiveAst) {
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241 | var symbol = findInputBinding(info, tb.key.source.substring(1), directiveAst);
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242 | if (symbol) {
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243 | result = {
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244 | symbol: symbol,
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245 | // the span here has to be relative to the start of the template
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246 | // value so deduct the absolute offset.
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247 | // TODO(kyliau): Use absolute source span throughout completions.
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248 | span: utils_1.offsetSpan(tb.key.span, -absValueOffset),
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249 | };
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250 | }
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251 | }
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252 | }
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253 | }
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254 | }
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255 | }
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256 | catch (e_2_1) { e_2 = { error: e_2_1 }; }
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257 | finally {
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258 | try {
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259 | if (templateBindings_1_1 && !templateBindings_1_1.done && (_a = templateBindings_1.return)) _a.call(templateBindings_1);
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260 | }
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261 | finally { if (e_2) throw e_2.error; }
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262 | }
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263 | return result;
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264 | }
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265 | function findAttribute(info, position) {
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266 | var templatePosition = position - info.template.span.start;
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267 | var path = utils_1.getPathToNodeAtPosition(info.htmlAst, templatePosition);
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268 | return path.first(compiler_1.Attribute);
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269 | }
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270 | // TODO: remove this function after the path includes 'DirectiveAst'.
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271 | // Find the directive that corresponds to the specified 'binding'
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272 | // at the specified 'position' in the 'ast'.
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273 | function findParentOfBinding(ast, binding, position) {
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274 | var res;
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275 | var visitor = new /** @class */ (function (_super) {
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276 | tslib_1.__extends(class_1, _super);
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277 | function class_1() {
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278 | return _super !== null && _super.apply(this, arguments) || this;
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279 | }
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280 | class_1.prototype.visit = function (ast) {
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281 | var span = utils_1.spanOf(ast);
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282 | if (!utils_1.inSpan(position, span)) {
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283 | // Returning a value here will result in the children being skipped.
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284 | return true;
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285 | }
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286 | };
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287 | class_1.prototype.visitEmbeddedTemplate = function (ast, context) {
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288 | return this.visitChildren(context, function (visit) {
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289 | visit(ast.directives);
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290 | visit(ast.children);
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291 | });
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292 | };
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293 | class_1.prototype.visitElement = function (ast, context) {
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294 | return this.visitChildren(context, function (visit) {
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295 | visit(ast.directives);
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296 | visit(ast.children);
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297 | });
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298 | };
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299 | class_1.prototype.visitDirective = function (ast) {
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300 | var result = this.visitChildren(ast, function (visit) {
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301 | visit(ast.inputs);
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302 | });
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303 | return result;
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304 | };
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305 | class_1.prototype.visitDirectiveProperty = function (ast, context) {
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306 | if (ast === binding) {
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307 | res = context;
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308 | }
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309 | };
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310 | return class_1;
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311 | }(compiler_1.RecursiveTemplateAstVisitor));
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312 | compiler_1.templateVisitAll(visitor, ast);
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313 | return res;
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314 | }
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315 | // Find the symbol of input binding in 'directiveAst' by 'name'.
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316 | function findInputBinding(info, name, directiveAst) {
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317 | var invertedInput = utils_1.invertMap(directiveAst.directive.inputs);
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318 | var fieldName = invertedInput[name];
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319 | if (fieldName) {
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320 | var classSymbol = info.template.query.getTypeSymbol(directiveAst.directive.type.reference);
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321 | if (classSymbol) {
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322 | return classSymbol.members().get(fieldName);
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323 | }
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324 | }
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325 | }
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326 | /**
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327 | * Wrap a symbol and change its kind to component.
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328 | */
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329 | var OverrideKindSymbol = /** @class */ (function () {
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330 | function OverrideKindSymbol(sym, kindOverride) {
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331 | this.sym = sym;
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332 | this.kind = kindOverride;
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333 | }
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334 | Object.defineProperty(OverrideKindSymbol.prototype, "name", {
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335 | get: function () {
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336 | return this.sym.name;
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337 | },
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338 | enumerable: false,
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339 | configurable: true
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340 | });
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341 | Object.defineProperty(OverrideKindSymbol.prototype, "language", {
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342 | get: function () {
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343 | return this.sym.language;
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344 | },
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345 | enumerable: false,
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346 | configurable: true
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347 | });
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348 | Object.defineProperty(OverrideKindSymbol.prototype, "type", {
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349 | get: function () {
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350 | return this.sym.type;
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351 | },
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352 | enumerable: false,
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353 | configurable: true
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354 | });
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355 | Object.defineProperty(OverrideKindSymbol.prototype, "container", {
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356 | get: function () {
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357 | return this.sym.container;
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358 | },
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359 | enumerable: false,
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360 | configurable: true
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361 | });
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362 | Object.defineProperty(OverrideKindSymbol.prototype, "public", {
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363 | get: function () {
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364 | return this.sym.public;
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365 | },
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366 | enumerable: false,
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367 | configurable: true
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368 | });
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369 | Object.defineProperty(OverrideKindSymbol.prototype, "callable", {
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370 | get: function () {
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371 | return this.sym.callable;
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372 | },
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373 | enumerable: false,
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374 | configurable: true
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375 | });
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376 | Object.defineProperty(OverrideKindSymbol.prototype, "nullable", {
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377 | get: function () {
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378 | return this.sym.nullable;
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379 | },
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380 | enumerable: false,
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381 | configurable: true
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382 | });
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383 | Object.defineProperty(OverrideKindSymbol.prototype, "definition", {
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384 | get: function () {
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385 | return this.sym.definition;
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386 | },
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387 | enumerable: false,
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388 | configurable: true
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389 | });
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390 | Object.defineProperty(OverrideKindSymbol.prototype, "documentation", {
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391 | get: function () {
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392 | return this.sym.documentation;
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393 | },
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394 | enumerable: false,
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395 | configurable: true
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396 | });
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397 | OverrideKindSymbol.prototype.members = function () {
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398 | return this.sym.members();
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399 | };
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400 | OverrideKindSymbol.prototype.signatures = function () {
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401 | return this.sym.signatures();
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402 | };
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403 | OverrideKindSymbol.prototype.selectSignature = function (types) {
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404 | return this.sym.selectSignature(types);
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405 | };
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406 | OverrideKindSymbol.prototype.indexed = function (argument) {
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407 | return this.sym.indexed(argument);
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408 | };
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409 | OverrideKindSymbol.prototype.typeArguments = function () {
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410 | return this.sym.typeArguments();
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411 | };
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412 | return OverrideKindSymbol;
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413 | }());
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414 | });
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415 | //# 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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 {AST, Attribute, BoundDirectivePropertyAst, CssSelector, DirectiveAst, ElementAst, EmbeddedTemplateAst, RecursiveTemplateAstVisitor, SelectorMatcher, StaticSymbol, TemplateAst, TemplateAstPath, templateVisitAll, tokenReference, VariableBinding} from '@angular/compiler';\nimport * as tss from 'typescript/lib/tsserverlibrary';\n\nimport {getExpressionScope} from './expression_diagnostics';\nimport {getExpressionSymbol} from './expressions';\nimport {AstResult, Definition, DirectiveKind, Span, Symbol, SymbolInfo} from './types';\nimport {diagnosticInfoFromTemplateInfo, findOutputBinding, findTemplateAstAt, getPathToNodeAtPosition, inSpan, invertMap, isNarrower, offsetSpan, spanOf} from './utils';\n\n/**\n * Traverses a template AST and locates symbol(s) at a specified position.\n * @param info template AST information set\n * @param position location to locate symbols at\n */\nexport function locateSymbols(info: AstResult, position: number): SymbolInfo[] {\n  const templatePosition = position - info.template.span.start;\n  // TODO: update `findTemplateAstAt` to use absolute positions.\n  const path = findTemplateAstAt(info.templateAst, templatePosition);\n  const attribute = findAttribute(info, position);\n\n  if (!path.tail) return [];\n\n  const narrowest = spanOf(path.tail);\n  const toVisit: TemplateAst[] = [];\n  for (let node: TemplateAst|undefined = path.tail;\n       node && isNarrower(spanOf(node.sourceSpan), narrowest); node = path.parentOf(node)) {\n    toVisit.push(node);\n  }\n\n  // For the structural directive, only care about the last template AST.\n  if (attribute?.name.startsWith('*')) {\n    toVisit.splice(0, toVisit.length - 1);\n  }\n\n  return toVisit.map(ast => locateSymbol(ast, path, info))\n      .filter((sym): sym is SymbolInfo => sym !== undefined);\n}\n\n/**\n * Visits a template node and locates the symbol in that node at a path position.\n * @param ast template AST node to visit\n * @param path non-empty set of narrowing AST nodes at a position\n * @param info template AST information set\n */\nfunction locateSymbol(ast: TemplateAst, path: TemplateAstPath, info: AstResult): SymbolInfo|\n    undefined {\n  const templatePosition = path.position;\n  const position = templatePosition + info.template.span.start;\n  let symbol: Symbol|undefined;\n  let span: Span|undefined;\n  let staticSymbol: StaticSymbol|undefined;\n  const attributeValueSymbol = (ast: AST): boolean => {\n    const attribute = findAttribute(info, position);\n    if (attribute) {\n      if (inSpan(templatePosition, spanOf(attribute.valueSpan))) {\n        let result: {symbol: Symbol, span: Span}|undefined;\n        if (attribute.name.startsWith('*')) {\n          result = getSymbolInMicrosyntax(info, path, attribute);\n        } else {\n          const dinfo = diagnosticInfoFromTemplateInfo(info);\n          const scope = getExpressionScope(dinfo, path);\n          result = getExpressionSymbol(scope, ast, templatePosition, info.template);\n        }\n        if (result) {\n          symbol = result.symbol;\n          span = offsetSpan(result.span, attribute.valueSpan!.start.offset);\n        }\n        return true;\n      }\n    }\n    return false;\n  };\n  ast.visit(\n      {\n        visitNgContent(_ast) {},\n        visitEmbeddedTemplate(_ast) {},\n        visitElement(ast) {\n          const component = ast.directives.find(d => d.directive.isComponent);\n          if (component) {\n            // Need to cast because 'reference' is typed as any\n            staticSymbol = component.directive.type.reference as StaticSymbol;\n            symbol = info.template.query.getTypeSymbol(staticSymbol);\n            symbol = symbol && new OverrideKindSymbol(symbol, DirectiveKind.COMPONENT);\n            span = spanOf(ast);\n          } else {\n            // Find a directive that matches the element name\n            const directive = ast.directives.find(\n                d => d.directive.selector != null && d.directive.selector.indexOf(ast.name) >= 0);\n            if (directive) {\n              // Need to cast because 'reference' is typed as any\n              staticSymbol = directive.directive.type.reference as StaticSymbol;\n              symbol = info.template.query.getTypeSymbol(staticSymbol);\n              symbol = symbol && new OverrideKindSymbol(symbol, DirectiveKind.DIRECTIVE);\n              span = spanOf(ast);\n            }\n          }\n        },\n        visitReference(ast) {\n          symbol = ast.value && info.template.query.getTypeSymbol(tokenReference(ast.value));\n          span = spanOf(ast);\n        },\n        visitVariable(_ast) {},\n        visitEvent(ast) {\n          if (!attributeValueSymbol(ast.handler)) {\n            symbol = findOutputBinding(ast, path, info.template.query);\n   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matcher.match(parsedAttribute[0], (_, {directive}) => {\n            // Need to cast because 'reference' is typed as any\n            staticSymbol = directive.type.reference as StaticSymbol;\n            symbol = info.template.query.getTypeSymbol(staticSymbol);\n            symbol = symbol && new OverrideKindSymbol(symbol, DirectiveKind.DIRECTIVE);\n            span = spanOf(ast);\n          });\n        },\n        visitBoundText(ast) {\n          const expressionPosition = templatePosition - ast.sourceSpan.start.offset;\n          if (inSpan(expressionPosition, ast.value.span)) {\n            const dinfo = diagnosticInfoFromTemplateInfo(info);\n            const scope = getExpressionScope(dinfo, path);\n            const result = getExpressionSymbol(scope, ast.value, templatePosition, info.template);\n            if (result) {\n              symbol = result.symbol;\n              span = offsetSpan(result.span, ast.sourceSpan.start.offset);\n            }\n          }\n        },\n    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the span of the directive is the whole opening tag of an element.\n                span = spanOf(attribute.sourceSpan);\n              } else {\n                symbol = findInputBinding(info, ast.templateName, directive);\n                span = spanOf(ast);\n              }\n            }\n          }\n        }\n      },\n      null);\n  if (symbol && span) {\n    const {start, end} = offsetSpan(span, info.template.span.start);\n    return {\n      symbol,\n      span: tss.createTextSpanFromBounds(start, end),\n      staticSymbol,\n    };\n  }\n}\n\n// Get the symbol in microsyntax at template position.\nfunction getSymbolInMicrosyntax(info: AstResult, path: TemplateAstPath, attribute: Attribute):\n    {symbol: Symbol, span: Span}|undefined {\n  if (!attribute.valueSpan) {\n    return;\n  }\n  const absValueOffset = attribute.valueSpan.start.offset;\n  let result: {symbol: Symbol, span: Span}|undefined;\n  const {templateBindings} = info.expressionParser.parseTemplateBindings(\n      attribute.name, attribute.value, attribute.sourceSpan.toString(),\n      attribute.sourceSpan.start.offset, attribute.valueSpan.start.offset);\n\n  // Find the symbol that contains the position.\n  for (const tb of templateBindings) {\n    if (tb instanceof VariableBinding) {\n      // TODO(kyliau): if binding is variable we should still look for the value\n      // of the key. For example, \"let i=index\" => \"index\" should point to\n      // NgForOfContext.index\n      continue;\n    }\n    if (inSpan(path.position, tb.value?.ast.sourceSpan)) {\n      const dinfo = diagnosticInfoFromTemplateInfo(info);\n      const scope = getExpressionScope(dinfo, path);\n      result = getExpressionSymbol(scope, tb.value!, path.position, info.template);\n    } else if (inSpan(path.position, tb.sourceSpan)) {\n      const template = path.first(EmbeddedTemplateAst);\n      if (template) {\n        // One element can only have one template binding.\n        const directiveAst = template.directives[0];\n        if (directiveAst) {\n          const symbol = findInputBinding(info, tb.key.source.substring(1), directiveAst);\n          if (symbol) {\n            result = {\n              symbol,\n              // the span here has to be relative to the start of the template\n              // value so deduct the absolute offset.\n              // TODO(kyliau): Use absolute source span throughout completions.\n              span: offsetSpan(tb.key.span, -absValueOffset),\n            };\n          }\n        }\n      }\n    }\n  }\n  return result;\n}\n\nfunction findAttribute(info: AstResult, position: number): Attribute|undefined {\n  const templatePosition = position - info.template.span.start;\n  const path = getPathToNodeAtPosition(info.htmlAst, templatePosition);\n  return path.first(Attribute);\n}\n\n// TODO: remove this function after the path includes 'DirectiveAst'.\n// Find the directive that corresponds to the specified 'binding'\n// at the specified 'position' in the 'ast'.\nfunction findParentOfBinding(\n    ast: TemplateAst[], binding: BoundDirectivePropertyAst, position: number): DirectiveAst|\n    undefined {\n  let res: DirectiveAst|undefined;\n  const visitor = new class extends RecursiveTemplateAstVisitor {\n    visit(ast: TemplateAst): any {\n      const span = spanOf(ast);\n      if (!inSpan(position, span)) {\n        // Returning a value here will result in the children being skipped.\n        return true;\n      }\n    }\n\n    visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any {\n      return this.visitChildren(context, visit => {\n        visit(ast.directives);\n        visit(ast.children);\n      });\n    }\n\n    visitElement(ast: ElementAst, context: any): any {\n      return this.visitChildren(context, visit => {\n        visit(ast.directives);\n        visit(ast.children);\n      });\n    }\n\n    visitDirective(ast: DirectiveAst) {\n      const result = this.visitChildren(ast, visit => {\n        visit(ast.inputs);\n      });\n      return result;\n    }\n\n    visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: DirectiveAst) {\n      if (ast === binding) {\n        res = context;\n      }\n    }\n  };\n  templateVisitAll(visitor, ast);\n  return res;\n}\n\n// Find the symbol of input binding in 'directiveAst' by 'name'.\nfunction findInputBinding(info: AstResult, name: string, directiveAst: DirectiveAst): Symbol|\n    undefined {\n  const invertedInput = invertMap(directiveAst.directive.inputs);\n  const fieldName = invertedInput[name];\n  if (fieldName) {\n    const classSymbol = info.template.query.getTypeSymbol(directiveAst.directive.type.reference);\n    if (classSymbol) {\n      return classSymbol.members().get(fieldName);\n    }\n  }\n}\n\n/**\n * Wrap a symbol and change its kind to component.\n */\nclass OverrideKindSymbol implements Symbol {\n  public readonly kind: DirectiveKind;\n  constructor(private sym: Symbol, kindOverride: DirectiveKind) {\n    this.kind = kindOverride;\n  }\n\n  get name(): string {\n    return this.sym.name;\n  }\n\n  get language(): string {\n    return this.sym.language;\n  }\n\n  get type(): Symbol|undefined {\n    return this.sym.type;\n  }\n\n  get container(): Symbol|undefined {\n    return this.sym.container;\n  }\n\n  get public(): boolean {\n    return this.sym.public;\n  }\n\n  get callable(): boolean {\n    return this.sym.callable;\n  }\n\n  get nullable(): boolean {\n    return this.sym.nullable;\n  }\n\n  get definition(): Definition {\n    return this.sym.definition;\n  }\n\n  get documentation(): ts.SymbolDisplayPart[] {\n    return this.sym.documentation;\n  }\n\n  members() {\n    return this.sym.members();\n  }\n\n  signatures() {\n    return this.sym.signatures();\n  }\n\n  selectSignature(types: Symbol[]) {\n    return this.sym.selectSignature(types);\n  }\n\n  indexed(argument: Symbol) {\n    return this.sym.indexed(argument);\n  }\n\n  typeArguments(): Symbol[]|undefined {\n    return this.sym.typeArguments();\n  }\n}\n"]} |
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