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/ivy/attribute_completions", ["require", "exports", "tslib", "@angular/compiler", "typescript", "@angular/language-service/ivy/display_parts", "@angular/language-service/ivy/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.getAttributeCompletionSymbol = exports.addAttributeCompletionEntries = exports.buildAttributeCompletionTable = exports.AttributeCompletionKind = 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 ts = require("typescript");
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23 | var display_parts_1 = require("@angular/language-service/ivy/display_parts");
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24 | var utils_1 = require("@angular/language-service/ivy/utils");
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25 | /**
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26 | * Differentiates different kinds of `AttributeCompletion`s.
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27 | */
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28 | var AttributeCompletionKind;
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29 | (function (AttributeCompletionKind) {
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30 | /**
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31 | * Completion of an attribute from the HTML schema.
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32 | *
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33 | * Attributes often have a corresponding DOM property of the same name.
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34 | */
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35 | AttributeCompletionKind[AttributeCompletionKind["DomAttribute"] = 0] = "DomAttribute";
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36 | /**
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37 | * Completion of a property from the DOM schema.
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38 | *
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39 | * `DomProperty` completions are generated only for properties which don't share their name with
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40 | * an HTML attribute.
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41 | */
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42 | AttributeCompletionKind[AttributeCompletionKind["DomProperty"] = 1] = "DomProperty";
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43 | /**
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44 | * Completion of an attribute that results in a new directive being matched on an element.
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45 | */
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46 | AttributeCompletionKind[AttributeCompletionKind["DirectiveAttribute"] = 2] = "DirectiveAttribute";
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47 | /**
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48 | * Completion of an attribute that results in a new structural directive being matched on an
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49 | * element.
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50 | */
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51 | AttributeCompletionKind[AttributeCompletionKind["StructuralDirectiveAttribute"] = 3] = "StructuralDirectiveAttribute";
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52 | /**
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53 | * Completion of an input from a directive which is either present on the element, or becomes
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54 | * present after the addition of this attribute.
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55 | */
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56 | AttributeCompletionKind[AttributeCompletionKind["DirectiveInput"] = 4] = "DirectiveInput";
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57 | /**
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58 | * Completion of an output from a directive which is either present on the element, or becomes
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59 | * present after the addition of this attribute.
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60 | */
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61 | AttributeCompletionKind[AttributeCompletionKind["DirectiveOutput"] = 5] = "DirectiveOutput";
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62 | })(AttributeCompletionKind = exports.AttributeCompletionKind || (exports.AttributeCompletionKind = {}));
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63 | /**
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64 | * Given an element and its context, produce a `Map` of all possible attribute completions.
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65 | *
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66 | * 3 kinds of attributes are considered for completion, from highest to lowest priority:
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67 | *
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68 | * 1. Inputs/outputs of directives present on the element already.
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69 | * 2. Inputs/outputs of directives that are not present on the element, but which would become
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70 | * present if such a binding is added.
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71 | * 3. Attributes from the DOM schema for the element.
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72 | *
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73 | * The priority of these options determines which completions are added to the `Map`. If a directive
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74 | * input shares the same name as a DOM attribute, the `Map` will reflect the directive input
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75 | * completion, not the DOM completion for that name.
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76 | */
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77 | function buildAttributeCompletionTable(component, element, checker) {
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78 | var e_1, _a, e_2, _b, e_3, _c, e_4, _d, e_5, _e, e_6, _f, e_7, _g, e_8, _h;
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79 | var table = new Map();
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80 | // Use the `ElementSymbol` or `TemplateSymbol` to iterate over directives present on the node, and
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81 | // their inputs/outputs. These have the highest priority of completion results.
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82 | var symbol = checker.getSymbolOfNode(element, component);
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83 | var presentDirectives = new Set();
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84 | if (symbol !== null) {
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85 | try {
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86 | // An `ElementSymbol` was available. This means inputs and outputs for directives on the
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87 | // element can be added to the completion table.
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88 | for (var _j = tslib_1.__values(symbol.directives), _k = _j.next(); !_k.done; _k = _j.next()) {
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89 | var dirSymbol = _k.value;
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90 | var directive = dirSymbol.tsSymbol.valueDeclaration;
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91 | if (!ts.isClassDeclaration(directive)) {
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92 | continue;
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93 | }
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94 | presentDirectives.add(directive);
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95 | var meta = checker.getDirectiveMetadata(directive);
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96 | if (meta === null) {
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97 | continue;
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98 | }
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99 | try {
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100 | for (var _l = (e_2 = void 0, tslib_1.__values(meta.inputs)), _m = _l.next(); !_m.done; _m = _l.next()) {
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101 | var _o = tslib_1.__read(_m.value, 2), propertyName = _o[0], classPropertyName = _o[1];
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102 | if (table.has(propertyName)) {
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103 | continue;
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104 | }
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105 | table.set(propertyName, {
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106 | kind: AttributeCompletionKind.DirectiveInput,
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107 | propertyName: propertyName,
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108 | directive: dirSymbol,
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109 | classPropertyName: classPropertyName,
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110 | twoWayBindingSupported: meta.outputs.hasBindingPropertyName(propertyName + 'Change'),
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111 | });
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112 | }
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113 | }
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114 | catch (e_2_1) { e_2 = { error: e_2_1 }; }
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115 | finally {
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116 | try {
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117 | if (_m && !_m.done && (_b = _l.return)) _b.call(_l);
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118 | }
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119 | finally { if (e_2) throw e_2.error; }
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120 | }
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121 | try {
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122 | for (var _p = (e_3 = void 0, tslib_1.__values(meta.outputs)), _q = _p.next(); !_q.done; _q = _p.next()) {
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123 | var _r = tslib_1.__read(_q.value, 2), propertyName = _r[0], classPropertyName = _r[1];
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124 | if (table.has(propertyName)) {
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125 | continue;
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126 | }
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127 | table.set(propertyName, {
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128 | kind: AttributeCompletionKind.DirectiveOutput,
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129 | eventName: propertyName,
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130 | directive: dirSymbol,
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131 | classPropertyName: classPropertyName,
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132 | });
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133 | }
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134 | }
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135 | catch (e_3_1) { e_3 = { error: e_3_1 }; }
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136 | finally {
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137 | try {
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138 | if (_q && !_q.done && (_c = _p.return)) _c.call(_p);
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139 | }
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140 | finally { if (e_3) throw e_3.error; }
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141 | }
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142 | }
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143 | }
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144 | catch (e_1_1) { e_1 = { error: e_1_1 }; }
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145 | finally {
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146 | try {
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147 | if (_k && !_k.done && (_a = _j.return)) _a.call(_j);
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148 | }
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149 | finally { if (e_1) throw e_1.error; }
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150 | }
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151 | }
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152 | // Next, explore hypothetical directives and determine if the addition of any single attributes
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153 | // can cause the directive to match the element.
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154 | var directivesInScope = checker.getDirectivesInScope(component);
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155 | if (directivesInScope !== null) {
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156 | var elementSelector = utils_1.makeElementSelector(element);
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157 | try {
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158 | for (var directivesInScope_1 = tslib_1.__values(directivesInScope), directivesInScope_1_1 = directivesInScope_1.next(); !directivesInScope_1_1.done; directivesInScope_1_1 = directivesInScope_1.next()) {
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159 | var dirInScope = directivesInScope_1_1.value;
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160 | var directive = dirInScope.tsSymbol.valueDeclaration;
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161 | // Skip directives that are present on the element.
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162 | if (!ts.isClassDeclaration(directive) || presentDirectives.has(directive)) {
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163 | continue;
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164 | }
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165 | var meta = checker.getDirectiveMetadata(directive);
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166 | if (meta === null || meta.selector === null) {
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167 | continue;
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168 | }
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169 | if (!meta.isStructural) {
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170 | // For non-structural directives, the directive's attribute selector(s) are matched against
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171 | // a hypothetical version of the element with those attributes. A match indicates that
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172 | // adding that attribute/input/output binding would cause the directive to become present,
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173 | // meaning that such a binding is a valid completion.
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174 | var selectors = compiler_1.CssSelector.parse(meta.selector);
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175 | var matcher = new compiler_1.SelectorMatcher();
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176 | matcher.addSelectables(selectors);
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177 | try {
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178 | for (var selectors_1 = (e_5 = void 0, tslib_1.__values(selectors)), selectors_1_1 = selectors_1.next(); !selectors_1_1.done; selectors_1_1 = selectors_1.next()) {
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179 | var selector = selectors_1_1.value;
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180 | try {
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181 | for (var _s = (e_6 = void 0, tslib_1.__values(selectorAttributes(selector))), _t = _s.next(); !_t.done; _t = _s.next()) {
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182 | var _u = tslib_1.__read(_t.value, 2), attrName = _u[0], attrValue = _u[1];
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183 | if (attrValue !== '') {
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184 | // This attribute selector requires a value, which is not supported in completion.
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185 | continue;
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186 | }
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187 | if (table.has(attrName)) {
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188 | // Skip this attribute as there's already a binding for it.
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189 | continue;
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190 | }
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191 | // Check whether adding this attribute would cause the directive to start matching.
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192 | var newElementSelector = elementSelector + ("[" + attrName + "]");
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193 | if (!matcher.match(compiler_1.CssSelector.parse(newElementSelector)[0], null)) {
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194 | // Nope, move on with our lives.
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195 | continue;
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196 | }
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197 | // Adding this attribute causes a new directive to be matched. Decide how to categorize
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198 | // it based on the directive's inputs and outputs.
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199 | if (meta.inputs.hasBindingPropertyName(attrName)) {
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200 | // This attribute corresponds to an input binding.
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201 | table.set(attrName, {
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202 | kind: AttributeCompletionKind.DirectiveInput,
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203 | directive: dirInScope,
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204 | propertyName: attrName,
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205 | classPropertyName: meta.inputs.getByBindingPropertyName(attrName)[0].classPropertyName,
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206 | twoWayBindingSupported: meta.outputs.hasBindingPropertyName(attrName + 'Change'),
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207 | });
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208 | }
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209 | else if (meta.outputs.hasBindingPropertyName(attrName)) {
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210 | // This attribute corresponds to an output binding.
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211 | table.set(attrName, {
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212 | kind: AttributeCompletionKind.DirectiveOutput,
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213 | directive: dirInScope,
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214 | eventName: attrName,
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215 | classPropertyName: meta.outputs.getByBindingPropertyName(attrName)[0].classPropertyName,
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216 | });
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217 | }
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218 | else {
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219 | // This attribute causes a new directive to be matched, but does not also correspond
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220 | // to an input or output binding.
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221 | table.set(attrName, {
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222 | kind: AttributeCompletionKind.DirectiveAttribute,
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223 | attribute: attrName,
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224 | directive: dirInScope,
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225 | });
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226 | }
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227 | }
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228 | }
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229 | catch (e_6_1) { e_6 = { error: e_6_1 }; }
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230 | finally {
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231 | try {
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232 | if (_t && !_t.done && (_f = _s.return)) _f.call(_s);
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233 | }
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234 | finally { if (e_6) throw e_6.error; }
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235 | }
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236 | }
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237 | }
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238 | catch (e_5_1) { e_5 = { error: e_5_1 }; }
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239 | finally {
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240 | try {
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241 | if (selectors_1_1 && !selectors_1_1.done && (_e = selectors_1.return)) _e.call(selectors_1);
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242 | }
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243 | finally { if (e_5) throw e_5.error; }
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244 | }
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245 | }
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246 | else {
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247 | // Hypothetically matching a structural directive is a litle different than a plain
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248 | // directive. Use of the '*' structural directive syntactic sugar means that the actual
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249 | // directive is applied to a plain <ng-template> node, not the existing element with any
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250 | // other attributes it might already have.
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251 | // Additionally, more than one attribute/input might need to be present in order for the
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252 | // directive to match (e.g. `ngFor` has a selector of `[ngFor][ngForOf]`). This gets a
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253 | // little tricky.
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254 | var structuralAttributes = getStructuralAttributes(meta);
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255 | try {
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256 | for (var structuralAttributes_1 = (e_7 = void 0, tslib_1.__values(structuralAttributes)), structuralAttributes_1_1 = structuralAttributes_1.next(); !structuralAttributes_1_1.done; structuralAttributes_1_1 = structuralAttributes_1.next()) {
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257 | var attrName = structuralAttributes_1_1.value;
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258 | table.set(attrName, {
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259 | kind: AttributeCompletionKind.StructuralDirectiveAttribute,
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260 | attribute: attrName,
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261 | directive: dirInScope,
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262 | });
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263 | }
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264 | }
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265 | catch (e_7_1) { e_7 = { error: e_7_1 }; }
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266 | finally {
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267 | try {
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268 | if (structuralAttributes_1_1 && !structuralAttributes_1_1.done && (_g = structuralAttributes_1.return)) _g.call(structuralAttributes_1);
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269 | }
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270 | finally { if (e_7) throw e_7.error; }
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271 | }
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272 | }
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273 | }
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274 | }
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275 | catch (e_4_1) { e_4 = { error: e_4_1 }; }
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276 | finally {
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277 | try {
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278 | if (directivesInScope_1_1 && !directivesInScope_1_1.done && (_d = directivesInScope_1.return)) _d.call(directivesInScope_1);
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279 | }
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280 | finally { if (e_4) throw e_4.error; }
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281 | }
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282 | }
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283 | // Finally, add any DOM attributes not already covered by inputs.
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284 | if (element instanceof compiler_1.TmplAstElement) {
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285 | try {
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286 | for (var _v = tslib_1.__values(checker.getPotentialDomBindings(element.name)), _w = _v.next(); !_w.done; _w = _v.next()) {
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287 | var _x = _w.value, attribute = _x.attribute, property = _x.property;
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288 | var isAlsoProperty = attribute === property;
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289 | if (!table.has(attribute)) {
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290 | table.set(attribute, {
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291 | kind: AttributeCompletionKind.DomAttribute,
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292 | attribute: attribute,
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293 | isAlsoProperty: isAlsoProperty,
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294 | });
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295 | }
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296 | if (!isAlsoProperty && !table.has(property)) {
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297 | table.set(property, {
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298 | kind: AttributeCompletionKind.DomProperty,
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299 | property: property,
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300 | });
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301 | }
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302 | }
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303 | }
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304 | catch (e_8_1) { e_8 = { error: e_8_1 }; }
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305 | finally {
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306 | try {
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307 | if (_w && !_w.done && (_h = _v.return)) _h.call(_v);
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308 | }
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309 | finally { if (e_8) throw e_8.error; }
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310 | }
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311 | }
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312 | return table;
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313 | }
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314 | exports.buildAttributeCompletionTable = buildAttributeCompletionTable;
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315 | /**
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316 | * Given an `AttributeCompletion`, add any available completions to a `ts.CompletionEntry` array of
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317 | * results.
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318 | *
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319 | * The kind of completions generated depends on whether the current context is an attribute context
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320 | * or not. For example, completing on `<element attr|>` will generate two results: `attribute` and
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321 | * `[attribute]` - either a static attribute can be generated, or a property binding. However,
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322 | * `<element [attr|]>` is not an attribute context, and so only the property completion `attribute`
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323 | * is generated. Note that this completion does not have the `[]` property binding sugar as its
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324 | * implicitly present in a property binding context (we're already completing within an `[attr|]`
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325 | * expression).
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326 | */
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327 | function addAttributeCompletionEntries(entries, completion, isAttributeContext, isElementContext, replacementSpan) {
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328 | switch (completion.kind) {
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329 | case AttributeCompletionKind.DirectiveAttribute: {
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330 | entries.push({
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331 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.DIRECTIVE),
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332 | name: completion.attribute,
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333 | sortText: completion.attribute,
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334 | replacementSpan: replacementSpan,
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335 | });
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336 | break;
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337 | }
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338 | case AttributeCompletionKind.StructuralDirectiveAttribute: {
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339 | // In an element, the completion is offered with a leading '*' to activate the structural
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340 | // directive. Once present, the structural attribute will be parsed as a template and not an
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341 | // element, and the prefix is no longer necessary.
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342 | var prefix = isElementContext ? '*' : '';
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343 | entries.push({
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344 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.DIRECTIVE),
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345 | name: prefix + completion.attribute,
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346 | sortText: prefix + completion.attribute,
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347 | replacementSpan: replacementSpan,
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348 | });
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349 | break;
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350 | }
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351 | case AttributeCompletionKind.DirectiveInput: {
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352 | if (isAttributeContext) {
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353 | // Offer a completion of a property binding.
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354 | entries.push({
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355 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.PROPERTY),
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356 | name: "[" + completion.propertyName + "]",
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357 | sortText: completion.propertyName,
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358 | replacementSpan: replacementSpan,
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359 | });
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360 | // If the directive supports banana-in-a-box for this input, offer that as well.
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361 | if (completion.twoWayBindingSupported) {
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362 | entries.push({
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363 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.PROPERTY),
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364 | name: "[(" + completion.propertyName + ")]",
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365 | // This completion should sort after the property binding.
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366 | sortText: completion.propertyName + '_1',
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367 | replacementSpan: replacementSpan,
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368 | });
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369 | }
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370 | // Offer a completion of the input binding as an attribute.
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371 | entries.push({
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372 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.ATTRIBUTE),
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373 | name: completion.propertyName,
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374 | // This completion should sort after both property binding options (one-way and two-way).
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375 | sortText: completion.propertyName + '_2',
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376 | replacementSpan: replacementSpan,
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377 | });
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378 | }
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379 | else {
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380 | entries.push({
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381 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.PROPERTY),
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382 | name: completion.propertyName,
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383 | sortText: completion.propertyName,
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384 | replacementSpan: replacementSpan,
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385 | });
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386 | }
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387 | break;
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388 | }
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389 | case AttributeCompletionKind.DirectiveOutput: {
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390 | if (isAttributeContext) {
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391 | entries.push({
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392 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.EVENT),
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393 | name: "(" + completion.eventName + ")",
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394 | sortText: completion.eventName,
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395 | replacementSpan: replacementSpan,
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396 | });
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397 | }
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398 | else {
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399 | entries.push({
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400 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.EVENT),
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401 | name: completion.eventName,
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402 | sortText: completion.eventName,
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403 | replacementSpan: replacementSpan,
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404 | });
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405 | }
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406 | break;
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407 | }
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408 | case AttributeCompletionKind.DomAttribute: {
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409 | if (isAttributeContext) {
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410 | // Offer a completion of an attribute binding.
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411 | entries.push({
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412 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.ATTRIBUTE),
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413 | name: completion.attribute,
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414 | sortText: completion.attribute,
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415 | replacementSpan: replacementSpan,
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416 | });
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417 | if (completion.isAlsoProperty) {
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418 | // Offer a completion of a property binding to the DOM property.
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419 | entries.push({
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420 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.PROPERTY),
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421 | name: "[" + completion.attribute + "]",
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422 | // In the case of DOM attributes, the property binding should sort after the attribute
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423 | // binding.
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424 | sortText: completion.attribute + '_1',
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425 | replacementSpan: replacementSpan,
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426 | });
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427 | }
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428 | }
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429 | else if (completion.isAlsoProperty) {
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430 | entries.push({
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431 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.PROPERTY),
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432 | name: completion.attribute,
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433 | sortText: completion.attribute,
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434 | replacementSpan: replacementSpan,
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435 | });
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436 | }
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437 | break;
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438 | }
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439 | case AttributeCompletionKind.DomProperty: {
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440 | if (!isAttributeContext) {
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441 | entries.push({
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442 | kind: display_parts_1.unsafeCastDisplayInfoKindToScriptElementKind(display_parts_1.DisplayInfoKind.PROPERTY),
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443 | name: completion.property,
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444 | sortText: completion.property,
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445 | replacementSpan: replacementSpan,
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446 | });
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447 | }
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448 | }
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449 | }
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450 | }
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451 | exports.addAttributeCompletionEntries = addAttributeCompletionEntries;
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452 | function getAttributeCompletionSymbol(completion, checker) {
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453 | var _a;
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454 | switch (completion.kind) {
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455 | case AttributeCompletionKind.DomAttribute:
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456 | case AttributeCompletionKind.DomProperty:
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457 | return null;
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458 | case AttributeCompletionKind.DirectiveAttribute:
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459 | case AttributeCompletionKind.StructuralDirectiveAttribute:
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460 | return completion.directive.tsSymbol;
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461 | case AttributeCompletionKind.DirectiveInput:
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462 | case AttributeCompletionKind.DirectiveOutput:
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463 | return (_a = checker.getDeclaredTypeOfSymbol(completion.directive.tsSymbol)
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464 | .getProperty(completion.classPropertyName)) !== null && _a !== void 0 ? _a : null;
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465 | }
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466 | }
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467 | exports.getAttributeCompletionSymbol = getAttributeCompletionSymbol;
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468 | /**
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469 | * Iterates over `CssSelector` attributes, which are internally represented in a zipped array style
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470 | * which is not conducive to straightforward iteration.
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471 | */
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472 | function selectorAttributes(selector) {
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473 | var i;
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474 | return tslib_1.__generator(this, function (_a) {
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475 | switch (_a.label) {
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476 | case 0:
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477 | i = 0;
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478 | _a.label = 1;
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479 | case 1:
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480 | if (!(i < selector.attrs.length)) return [3 /*break*/, 4];
|
481 | return [4 /*yield*/, [selector.attrs[0], selector.attrs[1]]];
|
482 | case 2:
|
483 | _a.sent();
|
484 | _a.label = 3;
|
485 | case 3:
|
486 | i += 2;
|
487 | return [3 /*break*/, 1];
|
488 | case 4: return [2 /*return*/];
|
489 | }
|
490 | });
|
491 | }
|
492 | function getStructuralAttributes(meta) {
|
493 | var e_9, _a;
|
494 | if (meta.selector === null) {
|
495 | return [];
|
496 | }
|
497 | var structuralAttributes = [];
|
498 | var selectors = compiler_1.CssSelector.parse(meta.selector);
|
499 | var _loop_1 = function (selector) {
|
500 | if (selector.element !== null && selector.element !== 'ng-template') {
|
501 | return "continue";
|
502 | }
|
503 | // Every attribute of this selector must be name-only - no required values.
|
504 | var attributeSelectors = Array.from(selectorAttributes(selector));
|
505 | if (!attributeSelectors.every(function (_a) {
|
506 | var _b = tslib_1.__read(_a, 2), _ = _b[0], attrValue = _b[1];
|
507 | return attrValue === '';
|
508 | })) {
|
509 | return "continue";
|
510 | }
|
511 | // Get every named selector.
|
512 | var attributes = attributeSelectors.map(function (_a) {
|
513 | var _b = tslib_1.__read(_a, 2), attrName = _b[0], _ = _b[1];
|
514 | return attrName;
|
515 | });
|
516 | // Find the shortest attribute. This is the structural directive "base", and all potential
|
517 | // input bindings must begin with the base. E.g. in `*ngFor="let a of b"`, `ngFor` is the
|
518 | // base attribute, and the `of` binding key corresponds to an input of `ngForOf`.
|
519 | var baseAttr = attributes.reduce(function (prev, curr) { return prev === null || curr.length < prev.length ? curr : prev; }, null);
|
520 | if (baseAttr === null) {
|
521 | return "continue";
|
522 | }
|
523 | // Validate that the attributes are compatible with use as a structural directive.
|
524 | var isValid = function (attr) {
|
525 | // The base attribute is valid by default.
|
526 | if (attr === baseAttr) {
|
527 | return true;
|
528 | }
|
529 | // Non-base attributes must all be prefixed with the base attribute.
|
530 | if (!attr.startsWith(baseAttr)) {
|
531 | return false;
|
532 | }
|
533 | // Non-base attributes must also correspond to directive inputs.
|
534 | if (!meta.inputs.hasBindingPropertyName(attr)) {
|
535 | return false;
|
536 | }
|
537 | // This attribute is compatible.
|
538 | return true;
|
539 | };
|
540 | if (!attributes.every(isValid)) {
|
541 | return "continue";
|
542 | }
|
543 | // This attribute is valid as a structural attribute for this directive.
|
544 | structuralAttributes.push(baseAttr);
|
545 | };
|
546 | try {
|
547 | for (var selectors_2 = tslib_1.__values(selectors), selectors_2_1 = selectors_2.next(); !selectors_2_1.done; selectors_2_1 = selectors_2.next()) {
|
548 | var selector = selectors_2_1.value;
|
549 | _loop_1(selector);
|
550 | }
|
551 | }
|
552 | catch (e_9_1) { e_9 = { error: e_9_1 }; }
|
553 | finally {
|
554 | try {
|
555 | if (selectors_2_1 && !selectors_2_1.done && (_a = selectors_2.return)) _a.call(selectors_2);
|
556 | }
|
557 | finally { if (e_9) throw e_9.error; }
|
558 | }
|
559 | return structuralAttributes;
|
560 | }
|
561 | });
|
562 | //# 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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 {CssSelector, SelectorMatcher, TmplAstElement, TmplAstTemplate} from '@angular/compiler';\nimport {DirectiveInScope, ElementSymbol, TemplateSymbol, TemplateTypeChecker, TypeCheckableDirectiveMeta} from '@angular/compiler-cli/src/ngtsc/typecheck/api';\nimport * as ts from 'typescript';\n\nimport {DisplayInfoKind, unsafeCastDisplayInfoKindToScriptElementKind} from './display_parts';\nimport {makeElementSelector} from './utils';\n\n/**\n * Differentiates different kinds of `AttributeCompletion`s.\n */\nexport enum AttributeCompletionKind {\n  /**\n   * Completion of an attribute from the HTML schema.\n   *\n   * Attributes often have a corresponding DOM property of the same name.\n   */\n  DomAttribute,\n\n  /**\n   * Completion of a property from the DOM schema.\n   *\n   * `DomProperty` completions are generated only for properties which don't share their name with\n   * an HTML attribute.\n   */\n  DomProperty,\n\n  /**\n   * Completion of an attribute that results in a new directive being matched on an element.\n   */\n  DirectiveAttribute,\n\n  /**\n   * Completion of an attribute that results in a new structural directive being matched on an\n   * element.\n   */\n  StructuralDirectiveAttribute,\n\n  /**\n   * Completion of an input from a directive which is either present on the element, or becomes\n   * present after the addition of this attribute.\n   */\n  DirectiveInput,\n\n  /**\n   * Completion of an output from a directive which is either present on the element, or becomes\n   * present after the addition of this attribute.\n   */\n  DirectiveOutput,\n}\n\n/**\n * Completion of an attribute from the DOM schema.\n */\nexport interface DomAttributeCompletion {\n  kind: AttributeCompletionKind.DomAttribute;\n\n  /**\n   * Name of the HTML attribute (not to be confused with the corresponding DOM property name).\n   */\n  attribute: string;\n\n  /**\n   * Whether this attribute is also a DOM property.\n   */\n  isAlsoProperty: boolean;\n}\n\n/**\n * Completion of a DOM property of an element that's distinct from an HTML attribute.\n */\nexport interface DomPropertyCompletion {\n  kind: AttributeCompletionKind.DomProperty;\n\n  /**\n   * Name of the DOM property\n   */\n  property: string;\n}\n\n/**\n * Completion of an attribute which results in a new directive being matched on an element.\n */\nexport interface DirectiveAttributeCompletion {\n  kind: AttributeCompletionKind.DirectiveAttribute|\n      AttributeCompletionKind.StructuralDirectiveAttribute;\n\n  /**\n   * Name of the attribute whose addition causes this directive to match the element.\n   */\n  attribute: string;\n\n  /**\n   * The directive whose selector gave rise to this completion.\n   */\n  directive: DirectiveInScope;\n}\n\n/**\n * Completion of an input of a directive which may either be present on the element, or become\n * present when a binding to this input is added.\n */\nexport interface DirectiveInputCompletion {\n  kind: AttributeCompletionKind.DirectiveInput;\n\n  /**\n   * The public property name of the input (the name which would be used in any binding to that\n   * input).\n   */\n  propertyName: string;\n\n  /**\n   * The directive which has this input.\n   */\n  directive: DirectiveInScope;\n\n  /**\n   * The field name on the directive class which corresponds to this input.\n   *\n   * Currently, in the case where a single property name corresponds to multiple input fields, only\n   * the first such field is represented here. In the future multiple results may be warranted.\n   */\n  classPropertyName: string;\n\n  /**\n   * Whether this input can be used with two-way binding (that is, whether a corresponding change\n   * output exists on the directive).\n   */\n  twoWayBindingSupported: boolean;\n}\n\nexport interface DirectiveOutputCompletion {\n  kind: AttributeCompletionKind.DirectiveOutput;\n\n  /**\n   * The public event name of the output (the name which would be used in any binding to that\n   * output).\n   */\n  eventName: string;\n\n  /**\n   *The directive which has this output.\n   */\n  directive: DirectiveInScope;\n\n  /**\n   * The field name on the directive class which corresponds to this output.\n   */\n  classPropertyName: string;\n}\n\n/**\n * Any named attribute which is available for completion on a given element.\n *\n * Disambiguated by the `kind` property into various types of completions.\n */\nexport type AttributeCompletion = DomAttributeCompletion|DomPropertyCompletion|\n    DirectiveAttributeCompletion|DirectiveInputCompletion|DirectiveOutputCompletion;\n\n/**\n * Given an element and its context, produce a `Map` of all possible attribute completions.\n *\n * 3 kinds of attributes are considered for completion, from highest to lowest priority:\n *\n * 1. Inputs/outputs of directives present on the element already.\n * 2. Inputs/outputs of directives that are not present on the element, but which would become\n *    present if such a binding is added.\n * 3. Attributes from the DOM schema for the element.\n *\n * The priority of these options determines which completions are added to the `Map`. If a directive\n * input shares the same name as a DOM attribute, the `Map` will reflect the directive input\n * completion, not the DOM completion for that name.\n */\nexport function buildAttributeCompletionTable(\n    component: ts.ClassDeclaration, element: TmplAstElement|TmplAstTemplate,\n    checker: TemplateTypeChecker): Map<string, AttributeCompletion> {\n  const table = new Map<string, AttributeCompletion>();\n\n  // Use the `ElementSymbol` or `TemplateSymbol` to iterate over directives present on the node, and\n  // their inputs/outputs. These have the highest priority of completion results.\n  const symbol: ElementSymbol|TemplateSymbol =\n      checker.getSymbolOfNode(element, component) as ElementSymbol | TemplateSymbol;\n  const presentDirectives = new Set<ts.ClassDeclaration>();\n  if (symbol !== null) {\n    // An `ElementSymbol` was available. This means inputs and outputs for directives on the\n    // element can be added to the completion table.\n    for (const dirSymbol of symbol.directives) {\n      const directive = dirSymbol.tsSymbol.valueDeclaration;\n      if (!ts.isClassDeclaration(directive)) {\n        continue;\n      }\n      presentDirectives.add(directive);\n\n      const meta = checker.getDirectiveMetadata(directive);\n      if (meta === null) {\n        continue;\n      }\n\n      for (const [propertyName, classPropertyName] of meta.inputs) {\n        if (table.has(propertyName)) {\n          continue;\n        }\n\n        table.set(propertyName, {\n          kind: AttributeCompletionKind.DirectiveInput,\n          propertyName,\n          directive: dirSymbol,\n          classPropertyName,\n          twoWayBindingSupported: meta.outputs.hasBindingPropertyName(propertyName + 'Change'),\n        });\n      }\n\n      for (const [propertyName, classPropertyName] of meta.outputs) {\n        if (table.has(propertyName)) {\n          continue;\n        }\n\n        table.set(propertyName, {\n          kind: AttributeCompletionKind.DirectiveOutput,\n          eventName: propertyName,\n          directive: dirSymbol,\n          classPropertyName,\n        });\n      }\n    }\n  }\n\n  // Next, explore hypothetical directives and determine if the addition of any single attributes\n  // can cause the directive to match the element.\n  const directivesInScope = checker.getDirectivesInScope(component);\n  if (directivesInScope !== null) {\n    const elementSelector = makeElementSelector(element);\n\n    for (const dirInScope of directivesInScope) {\n      const directive = dirInScope.tsSymbol.valueDeclaration;\n      // Skip directives that are present on the element.\n      if (!ts.isClassDeclaration(directive) || presentDirectives.has(directive)) {\n        continue;\n      }\n\n      const meta = checker.getDirectiveMetadata(directive);\n      if (meta === null || meta.selector === null) {\n        continue;\n      }\n\n      if (!meta.isStructural) {\n        // For non-structural directives, the directive's attribute selector(s) are matched against\n        // a hypothetical version of the element with those attributes. A match indicates that\n        // adding that attribute/input/output binding would cause the directive to become present,\n        // meaning that such a binding is a valid completion.\n        const selectors = CssSelector.parse(meta.selector);\n        const matcher = new SelectorMatcher();\n        matcher.addSelectables(selectors);\n\n        for (const selector of selectors) {\n          for (const [attrName, attrValue] of selectorAttributes(selector)) {\n            if (attrValue !== '') {\n              // This attribute selector requires a value, which is not supported in completion.\n              continue;\n            }\n\n            if (table.has(attrName)) {\n              // Skip this attribute as there's already a binding for it.\n              continue;\n            }\n\n            // Check whether adding this attribute would cause the directive to start matching.\n            const newElementSelector = elementSelector + `[${attrName}]`;\n            if (!matcher.match(CssSelector.parse(newElementSelector)[0], null)) {\n              // Nope, move on with our lives.\n              continue;\n            }\n\n            // Adding this attribute causes a new directive to be matched. Decide how to categorize\n            // it based on the directive's inputs and outputs.\n            if (meta.inputs.hasBindingPropertyName(attrName)) {\n              // This attribute corresponds to an input binding.\n              table.set(attrName, {\n                kind: AttributeCompletionKind.DirectiveInput,\n                directive: dirInScope,\n                propertyName: attrName,\n                classPropertyName:\n                    meta.inputs.getByBindingPropertyName(attrName)![0].classPropertyName,\n                twoWayBindingSupported: meta.outputs.hasBindingPropertyName(attrName + 'Change'),\n              });\n            } else if (meta.outputs.hasBindingPropertyName(attrName)) {\n              // This attribute corresponds to an output binding.\n              table.set(attrName, {\n                kind: AttributeCompletionKind.DirectiveOutput,\n                directive: dirInScope,\n                eventName: attrName,\n                classPropertyName:\n                    meta.outputs.getByBindingPropertyName(attrName)![0].classPropertyName,\n              });\n            } else {\n              // This attribute causes a new directive to be matched, but does not also correspond\n              // to an input or output binding.\n              table.set(attrName, {\n                kind: AttributeCompletionKind.DirectiveAttribute,\n                attribute: attrName,\n                directive: dirInScope,\n              });\n            }\n          }\n        }\n      } else {\n        // Hypothetically matching a structural directive is a litle different than a plain\n        // directive. Use of the '*' structural directive syntactic sugar means that the actual\n        // directive is applied to a plain <ng-template> node, not the existing element with any\n        // other attributes it might already have.\n        // Additionally, more than one attribute/input might need to be present in order for the\n        // directive to match (e.g. `ngFor` has a selector of `[ngFor][ngForOf]`). This gets a\n        // little tricky.\n\n        const structuralAttributes = getStructuralAttributes(meta);\n        for (const attrName of structuralAttributes) {\n          table.set(attrName, {\n            kind: AttributeCompletionKind.StructuralDirectiveAttribute,\n            attribute: attrName,\n            directive: dirInScope,\n          });\n        }\n      }\n    }\n  }\n\n  // Finally, add any DOM attributes not already covered by inputs.\n  if (element instanceof TmplAstElement) {\n    for (const {attribute, property} of checker.getPotentialDomBindings(element.name)) {\n      const isAlsoProperty = attribute === property;\n      if (!table.has(attribute)) {\n        table.set(attribute, {\n          kind: AttributeCompletionKind.DomAttribute,\n          attribute,\n          isAlsoProperty,\n        });\n      }\n      if (!isAlsoProperty && !table.has(property)) {\n        table.set(property, {\n          kind: AttributeCompletionKind.DomProperty,\n          property,\n        });\n      }\n    }\n  }\n\n  return table;\n}\n\n/**\n * Given an `AttributeCompletion`, add any available completions to a `ts.CompletionEntry` array of\n * results.\n *\n * The kind of completions generated depends on whether the current context is an attribute context\n * or not. For example, completing on `<element attr|>` will generate two results: `attribute` and\n * `[attribute]` - either a static attribute can be generated, or a property binding. However,\n * `<element [attr|]>` is not an attribute context, and so only the property completion `attribute`\n * is generated. Note that this completion does not have the `[]` property binding sugar as its\n * implicitly present in a property binding context (we're already completing within an `[attr|]`\n * expression).\n */\nexport function addAttributeCompletionEntries(\n    entries: ts.CompletionEntry[], completion: AttributeCompletion, isAttributeContext: boolean,\n    isElementContext: boolean, replacementSpan: ts.TextSpan|undefined): void {\n  switch (completion.kind) {\n    case AttributeCompletionKind.DirectiveAttribute: {\n      entries.push({\n        kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.DIRECTIVE),\n        name: completion.attribute,\n        sortText: completion.attribute,\n        replacementSpan,\n      });\n      break;\n    }\n    case AttributeCompletionKind.StructuralDirectiveAttribute: {\n      // In an element, the completion is offered with a leading '*' to activate the structural\n      // directive. Once present, the structural attribute will be parsed as a template and not an\n      // element, and the prefix is no longer necessary.\n      const prefix = isElementContext ? '*' : '';\n      entries.push({\n        kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.DIRECTIVE),\n        name: prefix + completion.attribute,\n        sortText: prefix + completion.attribute,\n        replacementSpan,\n      });\n      break;\n    }\n    case AttributeCompletionKind.DirectiveInput: {\n      if (isAttributeContext) {\n        // Offer a completion of a property binding.\n        entries.push({\n          kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.PROPERTY),\n          name: `[${completion.propertyName}]`,\n          sortText: completion.propertyName,\n          replacementSpan,\n        });\n        // If the directive supports banana-in-a-box for this input, offer that as well.\n        if (completion.twoWayBindingSupported) {\n          entries.push({\n            kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.PROPERTY),\n            name: `[(${completion.propertyName})]`,\n            // This completion should sort after the property binding.\n            sortText: completion.propertyName + '_1',\n            replacementSpan,\n          });\n        }\n        // Offer a completion of the input binding as an attribute.\n        entries.push({\n          kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.ATTRIBUTE),\n          name: completion.propertyName,\n          // This completion should sort after both property binding options (one-way and two-way).\n          sortText: completion.propertyName + '_2',\n          replacementSpan,\n        });\n      } else {\n        entries.push({\n          kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.PROPERTY),\n          name: completion.propertyName,\n          sortText: completion.propertyName,\n          replacementSpan,\n        });\n      }\n      break;\n    }\n    case AttributeCompletionKind.DirectiveOutput: {\n      if (isAttributeContext) {\n        entries.push({\n          kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.EVENT),\n          name: `(${completion.eventName})`,\n          sortText: completion.eventName,\n          replacementSpan,\n        });\n      } else {\n        entries.push({\n          kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.EVENT),\n          name: completion.eventName,\n          sortText: completion.eventName,\n          replacementSpan,\n        });\n      }\n      break;\n    }\n    case AttributeCompletionKind.DomAttribute: {\n      if (isAttributeContext) {\n        // Offer a completion of an attribute binding.\n        entries.push({\n          kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.ATTRIBUTE),\n          name: completion.attribute,\n          sortText: completion.attribute,\n          replacementSpan,\n        });\n        if (completion.isAlsoProperty) {\n          // Offer a completion of a property binding to the DOM property.\n          entries.push({\n            kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.PROPERTY),\n            name: `[${completion.attribute}]`,\n            // In the case of DOM attributes, the property binding should sort after the attribute\n            // binding.\n            sortText: completion.attribute + '_1',\n            replacementSpan,\n          });\n        }\n      } else if (completion.isAlsoProperty) {\n        entries.push({\n          kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.PROPERTY),\n          name: completion.attribute,\n          sortText: completion.attribute,\n          replacementSpan,\n        });\n      }\n      break;\n    }\n    case AttributeCompletionKind.DomProperty: {\n      if (!isAttributeContext) {\n        entries.push({\n          kind: unsafeCastDisplayInfoKindToScriptElementKind(DisplayInfoKind.PROPERTY),\n          name: completion.property,\n          sortText: completion.property,\n          replacementSpan,\n        });\n      }\n    }\n  }\n}\n\nexport function getAttributeCompletionSymbol(\n    completion: AttributeCompletion, checker: ts.TypeChecker): ts.Symbol|null {\n  switch (completion.kind) {\n    case AttributeCompletionKind.DomAttribute:\n    case AttributeCompletionKind.DomProperty:\n      return null;\n    case AttributeCompletionKind.DirectiveAttribute:\n    case AttributeCompletionKind.StructuralDirectiveAttribute:\n      return completion.directive.tsSymbol;\n    case AttributeCompletionKind.DirectiveInput:\n    case AttributeCompletionKind.DirectiveOutput:\n      return checker.getDeclaredTypeOfSymbol(completion.directive.tsSymbol)\n                 .getProperty(completion.classPropertyName) ??\n          null;\n  }\n}\n\n/**\n * Iterates over `CssSelector` attributes, which are internally represented in a zipped array style\n * which is not conducive to straightforward iteration.\n */\nfunction* selectorAttributes(selector: CssSelector): Iterable<[string, string]> {\n  for (let i = 0; i < selector.attrs.length; i += 2) {\n    yield [selector.attrs[0], selector.attrs[1]];\n  }\n}\n\nfunction getStructuralAttributes(meta: TypeCheckableDirectiveMeta): string[] {\n  if (meta.selector === null) {\n    return [];\n  }\n\n  const structuralAttributes: string[] = [];\n  const selectors = CssSelector.parse(meta.selector);\n  for (const selector of selectors) {\n    if (selector.element !== null && selector.element !== 'ng-template') {\n      // This particular selector does not apply under structural directive syntax.\n      continue;\n    }\n\n    // Every attribute of this selector must be name-only - no required values.\n    const attributeSelectors = Array.from(selectorAttributes(selector));\n    if (!attributeSelectors.every(([_, attrValue]) => attrValue === '')) {\n      continue;\n    }\n\n    // Get every named selector.\n    const attributes = attributeSelectors.map(([attrName, _]) => attrName);\n\n    // Find the shortest attribute. This is the structural directive \"base\", and all potential\n    // input bindings must begin with the base. E.g. in `*ngFor=\"let a of b\"`, `ngFor` is the\n    // base attribute, and the `of` binding key corresponds to an input of `ngForOf`.\n    const baseAttr = attributes.reduce(\n        (prev, curr) => prev === null || curr.length < prev.length ? curr : prev,\n        null as string | null);\n    if (baseAttr === null) {\n      // No attributes in this selector?\n      continue;\n    }\n\n    // Validate that the attributes are compatible with use as a structural directive.\n    const isValid = (attr: string): boolean => {\n      // The base attribute is valid by default.\n      if (attr === baseAttr) {\n        return true;\n      }\n\n      // Non-base attributes must all be prefixed with the base attribute.\n      if (!attr.startsWith(baseAttr)) {\n        return false;\n      }\n\n      // Non-base attributes must also correspond to directive inputs.\n      if (!meta.inputs.hasBindingPropertyName(attr)) {\n        return false;\n      }\n\n      // This attribute is compatible.\n      return true;\n    };\n\n    if (!attributes.every(isValid)) {\n      continue;\n    }\n\n    // This attribute is valid as a structural attribute for this directive.\n    structuralAttributes.push(baseAttr);\n  }\n\n  return structuralAttributes;\n}\n"]} |
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