1 | ;
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.getTemplateLocals = getTemplateLocals;
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7 |
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8 | var _keywords = require("./keywords");
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9 |
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10 | var _tokenizerEventHandlers = require("./parser/tokenizer-event-handlers");
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11 |
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12 | var _traverse = _interopRequireDefault(require("./traversal/traverse"));
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13 |
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14 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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15 |
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16 | /**
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17 | * Gets the correct Token from the Node based on it's type
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18 | */
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19 | function tokensFromType(node, scopedTokens, options) {
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20 | if (node.type === 'PathExpression') {
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21 | if (node.head.type === 'AtHead' || node.head.type === 'ThisHead') {
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22 | return;
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23 | }
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24 |
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25 | var possbleToken = node.head.name;
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26 |
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27 | if (scopedTokens.indexOf(possbleToken) === -1) {
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28 | return possbleToken;
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29 | }
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30 | } else if (node.type === 'ElementNode') {
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31 | var tag = node.tag;
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32 |
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33 | var _char = tag.charAt(0);
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34 |
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35 | if (_char === ':' || _char === '@') {
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36 | return;
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37 | }
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38 |
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39 | if (!options.includeHtmlElements && tag.indexOf('.') === -1 && tag.toLowerCase() === tag) {
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40 | return;
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41 | }
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42 |
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43 | if (tag.substr(0, 5) === 'this.') {
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44 | return;
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45 | }
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46 |
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47 | if (scopedTokens.indexOf(tag) !== -1) {
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48 | return;
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49 | }
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50 |
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51 | return tag;
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52 | }
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53 | }
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54 | /**
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55 | * Adds tokens to the tokensSet based on their node.type
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56 | */
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57 |
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58 |
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59 | function addTokens(tokensSet, node, scopedTokens, options) {
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60 | var maybeTokens = tokensFromType(node, scopedTokens, options);
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61 | (Array.isArray(maybeTokens) ? maybeTokens : [maybeTokens]).forEach(function (maybeToken) {
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62 | if (maybeToken !== undefined && maybeToken[0] !== '@') {
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63 | tokensSet.add(maybeToken.split('.')[0]);
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64 | }
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65 | });
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66 | }
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67 | /**
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68 | * Parses and traverses a given handlebars html template to extract all template locals
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69 | * referenced that could possible come from the praent scope. Can exclude known keywords
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70 | * optionally.
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71 | */
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72 |
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73 |
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74 | function getTemplateLocals(html, options) {
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75 | if (options === void 0) {
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76 | options = {
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77 | includeHtmlElements: false,
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78 | includeKeywords: false
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79 | };
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80 | }
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81 |
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82 | var ast = (0, _tokenizerEventHandlers.preprocess)(html);
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83 | var tokensSet = new Set();
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84 | var scopedTokens = [];
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85 | (0, _traverse.default)(ast, {
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86 | Block: {
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87 | enter: function enter(_ref) {
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88 | var blockParams = _ref.blockParams;
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89 | blockParams.forEach(function (param) {
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90 | scopedTokens.push(param);
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91 | });
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92 | },
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93 | exit: function exit(_ref2) {
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94 | var blockParams = _ref2.blockParams;
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95 | blockParams.forEach(function () {
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96 | scopedTokens.pop();
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97 | });
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98 | }
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99 | },
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100 | ElementNode: {
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101 | enter: function enter(node) {
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102 | node.blockParams.forEach(function (param) {
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103 | scopedTokens.push(param);
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104 | });
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105 | addTokens(tokensSet, node, scopedTokens, options);
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106 | },
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107 | exit: function exit(_ref3) {
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108 | var blockParams = _ref3.blockParams;
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109 | blockParams.forEach(function () {
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110 | scopedTokens.pop();
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111 | });
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112 | }
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113 | },
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114 | PathExpression: function PathExpression(node) {
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115 | addTokens(tokensSet, node, scopedTokens, options);
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116 | }
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117 | });
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118 | var tokens = [];
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119 | tokensSet.forEach(function (s) {
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120 | return tokens.push(s);
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121 | });
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122 |
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123 | if (!(options === null || options === void 0 ? void 0 : options.includeKeywords)) {
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124 | tokens = tokens.filter(function (token) {
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125 | return !(0, _keywords.isKeyword)(token);
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126 | });
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127 | }
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128 |
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129 | return tokens;
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130 | }
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