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 | import '../../util/ng_dev_mode';
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9 | import '../../util/ng_i18n_closure_mode';
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10 | import { getTemplateContent, SRCSET_ATTRS, URI_ATTRS, VALID_ATTRS, VALID_ELEMENTS } from '../../sanitization/html_sanitizer';
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11 | import { getInertBodyHelper } from '../../sanitization/inert_body';
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12 | import { _sanitizeUrl, sanitizeSrcset } from '../../sanitization/url_sanitizer';
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13 | import { assertDefined, assertEqual, assertGreaterThanOrEqual, assertOneOf, assertString } from '../../util/assert';
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14 | import { loadIcuContainerVisitor } from '../instructions/i18n_icu_container_visitor';
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15 | import { allocExpando, createTNodeAtIndex } from '../instructions/shared';
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16 | import { getDocument } from '../interfaces/document';
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17 | import { ELEMENT_MARKER, I18nCreateOpCode, ICU_MARKER } from '../interfaces/i18n';
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18 | import { HEADER_OFFSET } from '../interfaces/view';
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19 | import { getCurrentParentTNode, getCurrentTNode, setCurrentTNode } from '../state';
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20 | import { attachDebugGetter } from '../util/debug_utils';
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21 | import { i18nCreateOpCodesToString, i18nRemoveOpCodesToString, i18nUpdateOpCodesToString, icuCreateOpCodesToString } from './i18n_debug';
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22 | import { addTNodeAndUpdateInsertBeforeIndex } from './i18n_insert_before_index';
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23 | import { ensureIcuContainerVisitorLoaded } from './i18n_tree_shaking';
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24 | import { createTNodePlaceholder, icuCreateOpCode, setTIcu, setTNodeInsertBeforeIndex } from './i18n_util';
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25 | const BINDING_REGEXP = /�(\d+):?\d*�/gi;
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26 | const ICU_REGEXP = /({\s*�\d+:?\d*�\s*,\s*\S{6}\s*,[\s\S]*})/gi;
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27 | const NESTED_ICU = /�(\d+)�/;
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28 | const ICU_BLOCK_REGEXP = /^\s*(�\d+:?\d*�)\s*,\s*(select|plural)\s*,/;
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29 | const MARKER = `�`;
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30 | const SUBTEMPLATE_REGEXP = /�\/?\*(\d+:\d+)�/gi;
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31 | const PH_REGEXP = /�(\/?[#*]\d+):?\d*�/gi;
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32 | /**
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33 | * Angular Dart introduced &ngsp; as a placeholder for non-removable space, see:
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34 | * https://github.com/dart-lang/angular/blob/0bb611387d29d65b5af7f9d2515ab571fd3fbee4/_tests/test/compiler/preserve_whitespace_test.dart#L25-L32
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35 | * In Angular Dart &ngsp; is converted to the 0xE500 PUA (Private Use Areas) unicode character
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36 | * and later on replaced by a space. We are re-implementing the same idea here, since translations
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37 | * might contain this special character.
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38 | */
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39 | const NGSP_UNICODE_REGEXP = /\uE500/g;
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40 | function replaceNgsp(value) {
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41 | return value.replace(NGSP_UNICODE_REGEXP, ' ');
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42 | }
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43 | /**
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44 | * Create dynamic nodes from i18n translation block.
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45 | *
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46 | * - Text nodes are created synchronously
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47 | * - TNodes are linked into tree lazily
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48 | *
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49 | * @param tView Current `TView`
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50 | * @parentTNodeIndex index to the parent TNode of this i18n block
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51 | * @param lView Current `LView`
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52 | * @param index Index of `ɵɵi18nStart` instruction.
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53 | * @param message Message to translate.
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54 | * @param subTemplateIndex Index into the sub template of message translation. (ie in case of
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55 | * `ngIf`) (-1 otherwise)
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56 | */
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57 | export function i18nStartFirstCreatePass(tView, parentTNodeIndex, lView, index, message, subTemplateIndex) {
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58 | const rootTNode = getCurrentParentTNode();
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59 | const createOpCodes = [];
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60 | const updateOpCodes = [];
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61 | const existingTNodeStack = [[]];
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62 | if (ngDevMode) {
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63 | attachDebugGetter(createOpCodes, i18nCreateOpCodesToString);
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64 | attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);
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65 | }
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66 | message = getTranslationForTemplate(message, subTemplateIndex);
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67 | const msgParts = replaceNgsp(message).split(PH_REGEXP);
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68 | for (let i = 0; i < msgParts.length; i++) {
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69 | let value = msgParts[i];
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70 | if ((i & 1) === 0) {
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71 | // Even indexes are text (including bindings & ICU expressions)
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72 | const parts = i18nParseTextIntoPartsAndICU(value);
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73 | for (let j = 0; j < parts.length; j++) {
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74 | let part = parts[j];
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75 | if ((j & 1) === 0) {
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76 | // `j` is odd therefore `part` is string
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77 | const text = part;
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78 | ngDevMode && assertString(text, 'Parsed ICU part should be string');
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79 | if (text !== '') {
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80 | i18nStartFirstCreatePassProcessTextNode(tView, rootTNode, existingTNodeStack[0], createOpCodes, updateOpCodes, lView, text);
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81 | }
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82 | }
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83 | else {
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84 | // `j` is Even therefor `part` is an `ICUExpression`
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85 | const icuExpression = part;
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86 | // Verify that ICU expression has the right shape. Translations might contain invalid
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87 | // constructions (while original messages were correct), so ICU parsing at runtime may
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88 | // not succeed (thus `icuExpression` remains a string).
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89 | // Note: we intentionally retain the error here by not using `ngDevMode`, because
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90 | // the value can change based on the locale and users aren't guaranteed to hit
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91 | // an invalid string while they're developing.
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92 | if (typeof icuExpression !== 'object') {
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93 | throw new Error(`Unable to parse ICU expression in "${message}" message.`);
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94 | }
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95 | const icuContainerTNode = createTNodeAndAddOpCode(tView, rootTNode, existingTNodeStack[0], lView, createOpCodes, ngDevMode ? `ICU ${index}:${icuExpression.mainBinding}` : '', true);
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96 | const icuNodeIndex = icuContainerTNode.index;
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97 | ngDevMode &&
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98 | assertGreaterThanOrEqual(icuNodeIndex, HEADER_OFFSET, 'Index must be in absolute LView offset');
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99 | icuStart(tView, lView, updateOpCodes, parentTNodeIndex, icuExpression, icuNodeIndex);
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100 | }
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101 | }
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102 | }
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103 | else {
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104 | // Odd indexes are placeholders (elements and sub-templates)
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105 | // At this point value is something like: '/#1:2' (originally coming from '�/#1:2�')
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106 | const isClosing = value.charCodeAt(0) === 47 /* SLASH */;
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107 | const type = value.charCodeAt(isClosing ? 1 : 0);
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108 | ngDevMode && assertOneOf(type, 42 /* STAR */, 35 /* HASH */);
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109 | const index = HEADER_OFFSET + Number.parseInt(value.substring((isClosing ? 2 : 1)));
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110 | if (isClosing) {
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111 | existingTNodeStack.shift();
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112 | setCurrentTNode(getCurrentParentTNode(), false);
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113 | }
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114 | else {
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115 | const tNode = createTNodePlaceholder(tView, existingTNodeStack[0], index);
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116 | existingTNodeStack.unshift([]);
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117 | setCurrentTNode(tNode, true);
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118 | }
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119 | }
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120 | }
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121 | tView.data[index] = {
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122 | create: createOpCodes,
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123 | update: updateOpCodes,
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124 | };
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125 | }
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126 | /**
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127 | * Allocate space in i18n Range add create OpCode instruction to crete a text or comment node.
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128 | *
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129 | * @param tView Current `TView` needed to allocate space in i18n range.
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130 | * @param rootTNode Root `TNode` of the i18n block. This node determines if the new TNode will be
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131 | * added as part of the `i18nStart` instruction or as part of the `TNode.insertBeforeIndex`.
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132 | * @param existingTNodes internal state for `addTNodeAndUpdateInsertBeforeIndex`.
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133 | * @param lView Current `LView` needed to allocate space in i18n range.
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134 | * @param createOpCodes Array storing `I18nCreateOpCodes` where new opCodes will be added.
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135 | * @param text Text to be added when the `Text` or `Comment` node will be created.
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136 | * @param isICU true if a `Comment` node for ICU (instead of `Text`) node should be created.
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137 | */
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138 | function createTNodeAndAddOpCode(tView, rootTNode, existingTNodes, lView, createOpCodes, text, isICU) {
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139 | const i18nNodeIdx = allocExpando(tView, lView, 1, null);
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140 | let opCode = i18nNodeIdx << I18nCreateOpCode.SHIFT;
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141 | let parentTNode = getCurrentParentTNode();
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142 | if (rootTNode === parentTNode) {
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143 | // FIXME(misko): A null `parentTNode` should represent when we fall of the `LView` boundary.
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144 | // (there is no parent), but in some circumstances (because we are inconsistent about how we set
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145 | // `previousOrParentTNode`) it could point to `rootTNode` So this is a work around.
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146 | parentTNode = null;
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147 | }
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148 | if (parentTNode === null) {
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149 | // If we don't have a parent that means that we can eagerly add nodes.
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150 | // If we have a parent than these nodes can't be added now (as the parent has not been created
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151 | // yet) and instead the `parentTNode` is responsible for adding it. See
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152 | // `TNode.insertBeforeIndex`
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153 | opCode |= I18nCreateOpCode.APPEND_EAGERLY;
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154 | }
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155 | if (isICU) {
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156 | opCode |= I18nCreateOpCode.COMMENT;
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157 | ensureIcuContainerVisitorLoaded(loadIcuContainerVisitor);
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158 | }
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159 | createOpCodes.push(opCode, text === null ? '' : text);
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160 | // We store `{{?}}` so that when looking at debug `TNodeType.template` we can see where the
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161 | // bindings are.
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162 | const tNode = createTNodeAtIndex(tView, i18nNodeIdx, isICU ? 32 /* Icu */ : 1 /* Text */, text === null ? (ngDevMode ? '{{?}}' : '') : text, null);
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163 | addTNodeAndUpdateInsertBeforeIndex(existingTNodes, tNode);
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164 | const tNodeIdx = tNode.index;
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165 | setCurrentTNode(tNode, false /* Text nodes are self closing */);
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166 | if (parentTNode !== null && rootTNode !== parentTNode) {
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167 | // We are a child of deeper node (rather than a direct child of `i18nStart` instruction.)
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168 | // We have to make sure to add ourselves to the parent.
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169 | setTNodeInsertBeforeIndex(parentTNode, tNodeIdx);
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170 | }
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171 | return tNode;
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172 | }
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173 | /**
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174 | * Processes text node in i18n block.
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175 | *
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176 | * Text nodes can have:
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177 | * - Create instruction in `createOpCodes` for creating the text node.
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178 | * - Allocate spec for text node in i18n range of `LView`
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179 | * - If contains binding:
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180 | * - bindings => allocate space in i18n range of `LView` to store the binding value.
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181 | * - populate `updateOpCodes` with update instructions.
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182 | *
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183 | * @param tView Current `TView`
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184 | * @param rootTNode Root `TNode` of the i18n block. This node determines if the new TNode will
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185 | * be added as part of the `i18nStart` instruction or as part of the
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186 | * `TNode.insertBeforeIndex`.
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187 | * @param existingTNodes internal state for `addTNodeAndUpdateInsertBeforeIndex`.
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188 | * @param createOpCodes Location where the creation OpCodes will be stored.
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189 | * @param lView Current `LView`
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190 | * @param text The translated text (which may contain binding)
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191 | */
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192 | function i18nStartFirstCreatePassProcessTextNode(tView, rootTNode, existingTNodes, createOpCodes, updateOpCodes, lView, text) {
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193 | const hasBinding = text.match(BINDING_REGEXP);
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194 | const tNode = createTNodeAndAddOpCode(tView, rootTNode, existingTNodes, lView, createOpCodes, hasBinding ? null : text, false);
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195 | if (hasBinding) {
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196 | generateBindingUpdateOpCodes(updateOpCodes, text, tNode.index, null, 0, null);
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197 | }
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198 | }
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199 | /**
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200 | * See `i18nAttributes` above.
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201 | */
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202 | export function i18nAttributesFirstPass(tView, index, values) {
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203 | const previousElement = getCurrentTNode();
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204 | const previousElementIndex = previousElement.index;
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205 | const updateOpCodes = [];
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206 | if (ngDevMode) {
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207 | attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);
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208 | }
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209 | if (tView.firstCreatePass && tView.data[index] === null) {
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210 | for (let i = 0; i < values.length; i += 2) {
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211 | const attrName = values[i];
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212 | const message = values[i + 1];
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213 | if (message !== '') {
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214 | // Check if attribute value contains an ICU and throw an error if that's the case.
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215 | // ICUs in element attributes are not supported.
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216 | // Note: we intentionally retain the error here by not using `ngDevMode`, because
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217 | // the `value` can change based on the locale and users aren't guaranteed to hit
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218 | // an invalid string while they're developing.
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219 | if (ICU_REGEXP.test(message)) {
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220 | throw new Error(`ICU expressions are not supported in attributes. Message: "${message}".`);
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221 | }
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222 | // i18n attributes that hit this code path are guaranteed to have bindings, because
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223 | // the compiler treats static i18n attributes as regular attribute bindings.
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224 | // Since this may not be the first i18n attribute on this element we need to pass in how
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225 | // many previous bindings there have already been.
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226 | generateBindingUpdateOpCodes(updateOpCodes, message, previousElementIndex, attrName, countBindings(updateOpCodes), null);
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227 | }
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228 | }
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229 | tView.data[index] = updateOpCodes;
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230 | }
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231 | }
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232 | /**
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233 | * Generate the OpCodes to update the bindings of a string.
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234 | *
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235 | * @param updateOpCodes Place where the update opcodes will be stored.
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236 | * @param str The string containing the bindings.
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237 | * @param destinationNode Index of the destination node which will receive the binding.
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238 | * @param attrName Name of the attribute, if the string belongs to an attribute.
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239 | * @param sanitizeFn Sanitization function used to sanitize the string after update, if necessary.
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240 | * @param bindingStart The lView index of the next expression that can be bound via an opCode.
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241 | * @returns The mask value for these bindings
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242 | */
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243 | function generateBindingUpdateOpCodes(updateOpCodes, str, destinationNode, attrName, bindingStart, sanitizeFn) {
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244 | ngDevMode &&
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245 | assertGreaterThanOrEqual(destinationNode, HEADER_OFFSET, 'Index must be in absolute LView offset');
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246 | const maskIndex = updateOpCodes.length; // Location of mask
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247 | const sizeIndex = maskIndex + 1; // location of size for skipping
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248 | updateOpCodes.push(null, null); // Alloc space for mask and size
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249 | const startIndex = maskIndex + 2; // location of first allocation.
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250 | if (ngDevMode) {
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251 | attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);
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252 | }
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253 | const textParts = str.split(BINDING_REGEXP);
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254 | let mask = 0;
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255 | for (let j = 0; j < textParts.length; j++) {
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256 | const textValue = textParts[j];
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257 | if (j & 1) {
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258 | // Odd indexes are bindings
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259 | const bindingIndex = bindingStart + parseInt(textValue, 10);
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260 | updateOpCodes.push(-1 - bindingIndex);
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261 | mask = mask | toMaskBit(bindingIndex);
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262 | }
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263 | else if (textValue !== '') {
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264 | // Even indexes are text
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265 | updateOpCodes.push(textValue);
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266 | }
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267 | }
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268 | updateOpCodes.push(destinationNode << 2 /* SHIFT_REF */ |
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269 | (attrName ? 1 /* Attr */ : 0 /* Text */));
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270 | if (attrName) {
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271 | updateOpCodes.push(attrName, sanitizeFn);
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272 | }
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273 | updateOpCodes[maskIndex] = mask;
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274 | updateOpCodes[sizeIndex] = updateOpCodes.length - startIndex;
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275 | return mask;
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276 | }
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277 | /**
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278 | * Count the number of bindings in the given `opCodes`.
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279 | *
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280 | * It could be possible to speed this up, by passing the number of bindings found back from
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281 | * `generateBindingUpdateOpCodes()` to `i18nAttributesFirstPass()` but this would then require more
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282 | * complexity in the code and/or transient objects to be created.
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283 | *
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284 | * Since this function is only called once when the template is instantiated, is trivial in the
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285 | * first instance (since `opCodes` will be an empty array), and it is not common for elements to
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286 | * contain multiple i18n bound attributes, it seems like this is a reasonable compromise.
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287 | */
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288 | function countBindings(opCodes) {
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289 | let count = 0;
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290 | for (let i = 0; i < opCodes.length; i++) {
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291 | const opCode = opCodes[i];
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292 | // Bindings are negative numbers.
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293 | if (typeof opCode === 'number' && opCode < 0) {
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294 | count++;
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295 | }
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296 | }
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297 | return count;
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298 | }
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299 | /**
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300 | * Convert binding index to mask bit.
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301 | *
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302 | * Each index represents a single bit on the bit-mask. Because bit-mask only has 32 bits, we make
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303 | * the 32nd bit share all masks for all bindings higher than 32. Since it is extremely rare to
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304 | * have more than 32 bindings this will be hit very rarely. The downside of hitting this corner
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305 | * case is that we will execute binding code more often than necessary. (penalty of performance)
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306 | */
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307 | function toMaskBit(bindingIndex) {
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308 | return 1 << Math.min(bindingIndex, 31);
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309 | }
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310 | export function isRootTemplateMessage(subTemplateIndex) {
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311 | return subTemplateIndex === -1;
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312 | }
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313 | /**
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314 | * Removes everything inside the sub-templates of a message.
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315 | */
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316 | function removeInnerTemplateTranslation(message) {
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317 | let match;
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318 | let res = '';
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319 | let index = 0;
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320 | let inTemplate = false;
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321 | let tagMatched;
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322 | while ((match = SUBTEMPLATE_REGEXP.exec(message)) !== null) {
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323 | if (!inTemplate) {
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324 | res += message.substring(index, match.index + match[0].length);
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325 | tagMatched = match[1];
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326 | inTemplate = true;
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327 | }
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328 | else {
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329 | if (match[0] === `${MARKER}/*${tagMatched}${MARKER}`) {
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330 | index = match.index;
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331 | inTemplate = false;
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332 | }
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333 | }
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334 | }
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335 | ngDevMode &&
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336 | assertEqual(inTemplate, false, `Tag mismatch: unable to find the end of the sub-template in the translation "${message}"`);
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337 | res += message.substr(index);
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338 | return res;
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339 | }
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340 | /**
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341 | * Extracts a part of a message and removes the rest.
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342 | *
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343 | * This method is used for extracting a part of the message associated with a template. A
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344 | * translated message can span multiple templates.
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345 | *
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346 | * Example:
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347 | * ```
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348 | * <div i18n>Translate <span *ngIf>me</span>!</div>
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349 | * ```
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350 | *
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351 | * @param message The message to crop
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352 | * @param subTemplateIndex Index of the sub-template to extract. If undefined it returns the
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353 | * external template and removes all sub-templates.
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354 | */
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355 | export function getTranslationForTemplate(message, subTemplateIndex) {
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356 | if (isRootTemplateMessage(subTemplateIndex)) {
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357 | // We want the root template message, ignore all sub-templates
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358 | return removeInnerTemplateTranslation(message);
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359 | }
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360 | else {
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361 | // We want a specific sub-template
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362 | const start = message.indexOf(`:${subTemplateIndex}${MARKER}`) + 2 + subTemplateIndex.toString().length;
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363 | const end = message.search(new RegExp(`${MARKER}\\/\\*\\d+:${subTemplateIndex}${MARKER}`));
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364 | return removeInnerTemplateTranslation(message.substring(start, end));
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365 | }
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366 | }
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367 | /**
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368 | * Generate the OpCodes for ICU expressions.
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369 | *
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370 | * @param icuExpression
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371 | * @param index Index where the anchor is stored and an optional `TIcuContainerNode`
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372 | * - `lView[anchorIdx]` points to a `Comment` node representing the anchor for the ICU.
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373 | * - `tView.data[anchorIdx]` points to the `TIcuContainerNode` if ICU is root (`null` otherwise)
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374 | */
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375 | export function icuStart(tView, lView, updateOpCodes, parentIdx, icuExpression, anchorIdx) {
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376 | ngDevMode && assertDefined(icuExpression, 'ICU expression must be defined');
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377 | let bindingMask = 0;
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378 | const tIcu = {
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379 | type: icuExpression.type,
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380 | currentCaseLViewIndex: allocExpando(tView, lView, 1, null),
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381 | anchorIdx,
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382 | cases: [],
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383 | create: [],
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384 | remove: [],
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385 | update: []
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386 | };
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387 | addUpdateIcuSwitch(updateOpCodes, icuExpression, anchorIdx);
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388 | setTIcu(tView, anchorIdx, tIcu);
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389 | const values = icuExpression.values;
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390 | for (let i = 0; i < values.length; i++) {
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391 | // Each value is an array of strings & other ICU expressions
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392 | const valueArr = values[i];
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393 | const nestedIcus = [];
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394 | for (let j = 0; j < valueArr.length; j++) {
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395 | const value = valueArr[j];
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396 | if (typeof value !== 'string') {
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397 | // It is an nested ICU expression
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398 | const icuIndex = nestedIcus.push(value) - 1;
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399 | // Replace nested ICU expression by a comment node
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400 | valueArr[j] = `<!--�${icuIndex}�-->`;
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401 | }
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402 | }
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403 | bindingMask = parseIcuCase(tView, tIcu, lView, updateOpCodes, parentIdx, icuExpression.cases[i], valueArr.join(''), nestedIcus) |
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404 | bindingMask;
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405 | }
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406 | if (bindingMask) {
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407 | addUpdateIcuUpdate(updateOpCodes, bindingMask, anchorIdx);
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408 | }
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409 | }
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410 | /**
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411 | * Parses text containing an ICU expression and produces a JSON object for it.
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412 | * Original code from closure library, modified for Angular.
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413 | *
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414 | * @param pattern Text containing an ICU expression that needs to be parsed.
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415 | *
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416 | */
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417 | export function parseICUBlock(pattern) {
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418 | const cases = [];
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419 | const values = [];
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420 | let icuType = 1 /* plural */;
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421 | let mainBinding = 0;
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422 | pattern = pattern.replace(ICU_BLOCK_REGEXP, function (str, binding, type) {
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423 | if (type === 'select') {
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424 | icuType = 0 /* select */;
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425 | }
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426 | else {
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427 | icuType = 1 /* plural */;
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428 | }
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429 | mainBinding = parseInt(binding.substr(1), 10);
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430 | return '';
|
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431 | });
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432 | const parts = i18nParseTextIntoPartsAndICU(pattern);
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433 | // Looking for (key block)+ sequence. One of the keys has to be "other".
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434 | for (let pos = 0; pos < parts.length;) {
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435 | let key = parts[pos++].trim();
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436 | if (icuType === 1 /* plural */) {
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437 | // Key can be "=x", we just want "x"
|
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438 | key = key.replace(/\s*(?:=)?(\w+)\s*/, '$1');
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439 | }
|
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440 | if (key.length) {
|
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441 | cases.push(key);
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442 | }
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443 | const blocks = i18nParseTextIntoPartsAndICU(parts[pos++]);
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444 | if (cases.length > values.length) {
|
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445 | values.push(blocks);
|
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446 | }
|
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447 | }
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448 | // TODO(ocombe): support ICU expressions in attributes, see #21615
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449 | return { type: icuType, mainBinding: mainBinding, cases, values };
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450 | }
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451 | /**
|
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452 | * Breaks pattern into strings and top level {...} blocks.
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453 | * Can be used to break a message into text and ICU expressions, or to break an ICU expression
|
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454 | * into keys and cases. Original code from closure library, modified for Angular.
|
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455 | *
|
---|
456 | * @param pattern (sub)Pattern to be broken.
|
---|
457 | * @returns An `Array<string|IcuExpression>` where:
|
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458 | * - odd positions: `string` => text between ICU expressions
|
---|
459 | * - even positions: `ICUExpression` => ICU expression parsed into `ICUExpression` record.
|
---|
460 | */
|
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461 | export function i18nParseTextIntoPartsAndICU(pattern) {
|
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462 | if (!pattern) {
|
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463 | return [];
|
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464 | }
|
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465 | let prevPos = 0;
|
---|
466 | const braceStack = [];
|
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467 | const results = [];
|
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468 | const braces = /[{}]/g;
|
---|
469 | // lastIndex doesn't get set to 0 so we have to.
|
---|
470 | braces.lastIndex = 0;
|
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471 | let match;
|
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472 | while (match = braces.exec(pattern)) {
|
---|
473 | const pos = match.index;
|
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474 | if (match[0] == '}') {
|
---|
475 | braceStack.pop();
|
---|
476 | if (braceStack.length == 0) {
|
---|
477 | // End of the block.
|
---|
478 | const block = pattern.substring(prevPos, pos);
|
---|
479 | if (ICU_BLOCK_REGEXP.test(block)) {
|
---|
480 | results.push(parseICUBlock(block));
|
---|
481 | }
|
---|
482 | else {
|
---|
483 | results.push(block);
|
---|
484 | }
|
---|
485 | prevPos = pos + 1;
|
---|
486 | }
|
---|
487 | }
|
---|
488 | else {
|
---|
489 | if (braceStack.length == 0) {
|
---|
490 | const substring = pattern.substring(prevPos, pos);
|
---|
491 | results.push(substring);
|
---|
492 | prevPos = pos + 1;
|
---|
493 | }
|
---|
494 | braceStack.push('{');
|
---|
495 | }
|
---|
496 | }
|
---|
497 | const substring = pattern.substring(prevPos);
|
---|
498 | results.push(substring);
|
---|
499 | return results;
|
---|
500 | }
|
---|
501 | /**
|
---|
502 | * Parses a node, its children and its siblings, and generates the mutate & update OpCodes.
|
---|
503 | *
|
---|
504 | */
|
---|
505 | export function parseIcuCase(tView, tIcu, lView, updateOpCodes, parentIdx, caseName, unsafeCaseHtml, nestedIcus) {
|
---|
506 | const create = [];
|
---|
507 | const remove = [];
|
---|
508 | const update = [];
|
---|
509 | if (ngDevMode) {
|
---|
510 | attachDebugGetter(create, icuCreateOpCodesToString);
|
---|
511 | attachDebugGetter(remove, i18nRemoveOpCodesToString);
|
---|
512 | attachDebugGetter(update, i18nUpdateOpCodesToString);
|
---|
513 | }
|
---|
514 | tIcu.cases.push(caseName);
|
---|
515 | tIcu.create.push(create);
|
---|
516 | tIcu.remove.push(remove);
|
---|
517 | tIcu.update.push(update);
|
---|
518 | const inertBodyHelper = getInertBodyHelper(getDocument());
|
---|
519 | const inertBodyElement = inertBodyHelper.getInertBodyElement(unsafeCaseHtml);
|
---|
520 | ngDevMode && assertDefined(inertBodyElement, 'Unable to generate inert body element');
|
---|
521 | const inertRootNode = getTemplateContent(inertBodyElement) || inertBodyElement;
|
---|
522 | if (inertRootNode) {
|
---|
523 | return walkIcuTree(tView, tIcu, lView, updateOpCodes, create, remove, update, inertRootNode, parentIdx, nestedIcus, 0);
|
---|
524 | }
|
---|
525 | else {
|
---|
526 | return 0;
|
---|
527 | }
|
---|
528 | }
|
---|
529 | function walkIcuTree(tView, tIcu, lView, sharedUpdateOpCodes, create, remove, update, parentNode, parentIdx, nestedIcus, depth) {
|
---|
530 | let bindingMask = 0;
|
---|
531 | let currentNode = parentNode.firstChild;
|
---|
532 | while (currentNode) {
|
---|
533 | const newIndex = allocExpando(tView, lView, 1, null);
|
---|
534 | switch (currentNode.nodeType) {
|
---|
535 | case Node.ELEMENT_NODE:
|
---|
536 | const element = currentNode;
|
---|
537 | const tagName = element.tagName.toLowerCase();
|
---|
538 | if (VALID_ELEMENTS.hasOwnProperty(tagName)) {
|
---|
539 | addCreateNodeAndAppend(create, ELEMENT_MARKER, tagName, parentIdx, newIndex);
|
---|
540 | tView.data[newIndex] = tagName;
|
---|
541 | const elAttrs = element.attributes;
|
---|
542 | for (let i = 0; i < elAttrs.length; i++) {
|
---|
543 | const attr = elAttrs.item(i);
|
---|
544 | const lowerAttrName = attr.name.toLowerCase();
|
---|
545 | const hasBinding = !!attr.value.match(BINDING_REGEXP);
|
---|
546 | // we assume the input string is safe, unless it's using a binding
|
---|
547 | if (hasBinding) {
|
---|
548 | if (VALID_ATTRS.hasOwnProperty(lowerAttrName)) {
|
---|
549 | if (URI_ATTRS[lowerAttrName]) {
|
---|
550 | generateBindingUpdateOpCodes(update, attr.value, newIndex, attr.name, 0, _sanitizeUrl);
|
---|
551 | }
|
---|
552 | else if (SRCSET_ATTRS[lowerAttrName]) {
|
---|
553 | generateBindingUpdateOpCodes(update, attr.value, newIndex, attr.name, 0, sanitizeSrcset);
|
---|
554 | }
|
---|
555 | else {
|
---|
556 | generateBindingUpdateOpCodes(update, attr.value, newIndex, attr.name, 0, null);
|
---|
557 | }
|
---|
558 | }
|
---|
559 | else {
|
---|
560 | ngDevMode &&
|
---|
561 | console.warn(`WARNING: ignoring unsafe attribute value ` +
|
---|
562 | `${lowerAttrName} on element ${tagName} ` +
|
---|
563 | `(see https://g.co/ng/security#xss)`);
|
---|
564 | }
|
---|
565 | }
|
---|
566 | else {
|
---|
567 | addCreateAttribute(create, newIndex, attr);
|
---|
568 | }
|
---|
569 | }
|
---|
570 | // Parse the children of this node (if any)
|
---|
571 | bindingMask = walkIcuTree(tView, tIcu, lView, sharedUpdateOpCodes, create, remove, update, currentNode, newIndex, nestedIcus, depth + 1) |
|
---|
572 | bindingMask;
|
---|
573 | addRemoveNode(remove, newIndex, depth);
|
---|
574 | }
|
---|
575 | break;
|
---|
576 | case Node.TEXT_NODE:
|
---|
577 | const value = currentNode.textContent || '';
|
---|
578 | const hasBinding = value.match(BINDING_REGEXP);
|
---|
579 | addCreateNodeAndAppend(create, null, hasBinding ? '' : value, parentIdx, newIndex);
|
---|
580 | addRemoveNode(remove, newIndex, depth);
|
---|
581 | if (hasBinding) {
|
---|
582 | bindingMask =
|
---|
583 | generateBindingUpdateOpCodes(update, value, newIndex, null, 0, null) | bindingMask;
|
---|
584 | }
|
---|
585 | break;
|
---|
586 | case Node.COMMENT_NODE:
|
---|
587 | // Check if the comment node is a placeholder for a nested ICU
|
---|
588 | const isNestedIcu = NESTED_ICU.exec(currentNode.textContent || '');
|
---|
589 | if (isNestedIcu) {
|
---|
590 | const nestedIcuIndex = parseInt(isNestedIcu[1], 10);
|
---|
591 | const icuExpression = nestedIcus[nestedIcuIndex];
|
---|
592 | // Create the comment node that will anchor the ICU expression
|
---|
593 | addCreateNodeAndAppend(create, ICU_MARKER, ngDevMode ? `nested ICU ${nestedIcuIndex}` : '', parentIdx, newIndex);
|
---|
594 | icuStart(tView, lView, sharedUpdateOpCodes, parentIdx, icuExpression, newIndex);
|
---|
595 | addRemoveNestedIcu(remove, newIndex, depth);
|
---|
596 | }
|
---|
597 | break;
|
---|
598 | }
|
---|
599 | currentNode = currentNode.nextSibling;
|
---|
600 | }
|
---|
601 | return bindingMask;
|
---|
602 | }
|
---|
603 | function addRemoveNode(remove, index, depth) {
|
---|
604 | if (depth === 0) {
|
---|
605 | remove.push(index);
|
---|
606 | }
|
---|
607 | }
|
---|
608 | function addRemoveNestedIcu(remove, index, depth) {
|
---|
609 | if (depth === 0) {
|
---|
610 | remove.push(~index); // remove ICU at `index`
|
---|
611 | remove.push(index); // remove ICU comment at `index`
|
---|
612 | }
|
---|
613 | }
|
---|
614 | function addUpdateIcuSwitch(update, icuExpression, index) {
|
---|
615 | update.push(toMaskBit(icuExpression.mainBinding), 2, -1 - icuExpression.mainBinding, index << 2 /* SHIFT_REF */ | 2 /* IcuSwitch */);
|
---|
616 | }
|
---|
617 | function addUpdateIcuUpdate(update, bindingMask, index) {
|
---|
618 | update.push(bindingMask, 1, index << 2 /* SHIFT_REF */ | 3 /* IcuUpdate */);
|
---|
619 | }
|
---|
620 | function addCreateNodeAndAppend(create, marker, text, appendToParentIdx, createAtIdx) {
|
---|
621 | if (marker !== null) {
|
---|
622 | create.push(marker);
|
---|
623 | }
|
---|
624 | create.push(text, createAtIdx, icuCreateOpCode(0 /* AppendChild */, appendToParentIdx, createAtIdx));
|
---|
625 | }
|
---|
626 | function addCreateAttribute(create, newIndex, attr) {
|
---|
627 | create.push(newIndex << 1 /* SHIFT_REF */ | 1 /* Attr */, attr.name, attr.value);
|
---|
628 | }
|
---|
629 | //# 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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 */\nimport '../../util/ng_dev_mode';\nimport '../../util/ng_i18n_closure_mode';\n\nimport {getTemplateContent, SRCSET_ATTRS, URI_ATTRS, VALID_ATTRS, VALID_ELEMENTS} from '../../sanitization/html_sanitizer';\nimport {getInertBodyHelper} from '../../sanitization/inert_body';\nimport {_sanitizeUrl, sanitizeSrcset} from '../../sanitization/url_sanitizer';\nimport {assertDefined, assertEqual, assertGreaterThanOrEqual, assertOneOf, assertString} from '../../util/assert';\nimport {CharCode} from '../../util/char_code';\nimport {loadIcuContainerVisitor} from '../instructions/i18n_icu_container_visitor';\nimport {allocExpando, createTNodeAtIndex} from '../instructions/shared';\nimport {getDocument} from '../interfaces/document';\nimport {ELEMENT_MARKER, I18nCreateOpCode, I18nCreateOpCodes, I18nRemoveOpCodes, I18nUpdateOpCode, I18nUpdateOpCodes, ICU_MARKER, IcuCreateOpCode, IcuCreateOpCodes, IcuExpression, IcuType, TI18n, TIcu} from '../interfaces/i18n';\nimport {TNode, TNodeType} from '../interfaces/node';\nimport {SanitizerFn} from '../interfaces/sanitization';\nimport {HEADER_OFFSET, LView, TView} from '../interfaces/view';\nimport {getCurrentParentTNode, getCurrentTNode, setCurrentTNode} from '../state';\nimport {attachDebugGetter} from '../util/debug_utils';\n\nimport {i18nCreateOpCodesToString, i18nRemoveOpCodesToString, i18nUpdateOpCodesToString, icuCreateOpCodesToString} from './i18n_debug';\nimport {addTNodeAndUpdateInsertBeforeIndex} from './i18n_insert_before_index';\nimport {ensureIcuContainerVisitorLoaded} from './i18n_tree_shaking';\nimport {createTNodePlaceholder, icuCreateOpCode, setTIcu, setTNodeInsertBeforeIndex} from './i18n_util';\n\n\n\nconst BINDING_REGEXP = /�(\\d+):?\\d*�/gi;\nconst ICU_REGEXP = /({\\s*�\\d+:?\\d*�\\s*,\\s*\\S{6}\\s*,[\\s\\S]*})/gi;\nconst NESTED_ICU = /�(\\d+)�/;\nconst ICU_BLOCK_REGEXP = /^\\s*(�\\d+:?\\d*�)\\s*,\\s*(select|plural)\\s*,/;\n\nconst MARKER = `�`;\nconst SUBTEMPLATE_REGEXP = /�\\/?\\*(\\d+:\\d+)�/gi;\nconst PH_REGEXP = /�(\\/?[#*]\\d+):?\\d*�/gi;\n\n/**\n * Angular Dart introduced &ngsp; as a placeholder for non-removable space, see:\n * https://github.com/dart-lang/angular/blob/0bb611387d29d65b5af7f9d2515ab571fd3fbee4/_tests/test/compiler/preserve_whitespace_test.dart#L25-L32\n * In Angular Dart &ngsp; is converted to the 0xE500 PUA (Private Use Areas) unicode character\n * and later on replaced by a space. We are re-implementing the same idea here, since translations\n * might contain this special character.\n */\nconst NGSP_UNICODE_REGEXP = /\\uE500/g;\nfunction replaceNgsp(value: string): string {\n  return value.replace(NGSP_UNICODE_REGEXP, ' ');\n}\n\n/**\n * Create dynamic nodes from i18n translation block.\n *\n * - Text nodes are created synchronously\n * - TNodes are linked into tree lazily\n *\n * @param tView Current `TView`\n * @parentTNodeIndex index to the parent TNode of this i18n block\n * @param lView Current `LView`\n * @param index Index of `ɵɵi18nStart` instruction.\n * @param message Message to translate.\n * @param subTemplateIndex Index into the sub template of message translation. (ie in case of\n *     `ngIf`) (-1 otherwise)\n */\nexport function i18nStartFirstCreatePass(\n    tView: TView, parentTNodeIndex: number, lView: LView, index: number, message: string,\n    subTemplateIndex: number) {\n  const rootTNode = getCurrentParentTNode();\n  const createOpCodes: I18nCreateOpCodes = [] as any;\n  const updateOpCodes: I18nUpdateOpCodes = [] as any;\n  const existingTNodeStack: TNode[][] = [[]];\n  if (ngDevMode) {\n    attachDebugGetter(createOpCodes, i18nCreateOpCodesToString);\n    attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);\n  }\n\n  message = getTranslationForTemplate(message, subTemplateIndex);\n  const msgParts = replaceNgsp(message).split(PH_REGEXP);\n  for (let i = 0; i < msgParts.length; i++) {\n    let value = msgParts[i];\n    if ((i & 1) === 0) {\n      // Even indexes are text (including bindings & ICU expressions)\n      const parts = i18nParseTextIntoPartsAndICU(value);\n      for (let j = 0; j < parts.length; j++) {\n        let part = parts[j];\n        if ((j & 1) === 0) {\n          // `j` is odd therefore `part` is string\n          const text = part as string;\n          ngDevMode && assertString(text, 'Parsed ICU part should be string');\n          if (text !== '') {\n            i18nStartFirstCreatePassProcessTextNode(\n                tView, rootTNode, existingTNodeStack[0], createOpCodes, updateOpCodes, lView, text);\n          }\n        } else {\n          // `j` is Even therefor `part` is an `ICUExpression`\n          const icuExpression: IcuExpression = part as IcuExpression;\n          // Verify that ICU expression has the right shape. Translations might contain invalid\n          // constructions (while original messages were correct), so ICU parsing at runtime may\n          // not succeed (thus `icuExpression` remains a string).\n          // Note: we intentionally retain the error here by not using `ngDevMode`, because\n          // the value can change based on the locale and users aren't guaranteed to hit\n          // an invalid string while they're developing.\n          if (typeof icuExpression !== 'object') {\n            throw new Error(`Unable to parse ICU expression in \"${message}\" message.`);\n          }\n          const icuContainerTNode = createTNodeAndAddOpCode(\n              tView, rootTNode, existingTNodeStack[0], lView, createOpCodes,\n              ngDevMode ? `ICU ${index}:${icuExpression.mainBinding}` : '', true);\n          const icuNodeIndex = icuContainerTNode.index;\n          ngDevMode &&\n              assertGreaterThanOrEqual(\n                  icuNodeIndex, HEADER_OFFSET, 'Index must be in absolute LView offset');\n          icuStart(tView, lView, updateOpCodes, parentTNodeIndex, icuExpression, icuNodeIndex);\n        }\n      }\n    } else {\n      // Odd indexes are placeholders (elements and sub-templates)\n      // At this point value is something like: '/#1:2' (originally coming from '�/#1:2�')\n      const isClosing = value.charCodeAt(0) === CharCode.SLASH;\n      const type = value.charCodeAt(isClosing ? 1 : 0);\n      ngDevMode && assertOneOf(type, CharCode.STAR, CharCode.HASH);\n      const index = HEADER_OFFSET + Number.parseInt(value.substring((isClosing ? 2 : 1)));\n      if (isClosing) {\n        existingTNodeStack.shift();\n        setCurrentTNode(getCurrentParentTNode()!, false);\n      } else {\n        const tNode = createTNodePlaceholder(tView, existingTNodeStack[0], index);\n        existingTNodeStack.unshift([]);\n        setCurrentTNode(tNode, true);\n      }\n    }\n  }\n\n  tView.data[index] = <TI18n>{\n    create: createOpCodes,\n    update: updateOpCodes,\n  };\n}\n\n/**\n * Allocate space in i18n Range add create OpCode instruction to crete a text or comment node.\n *\n * @param tView Current `TView` needed to allocate space in i18n range.\n * @param rootTNode Root `TNode` of the i18n block. This node determines if the new TNode will be\n *     added as part of the `i18nStart` instruction or as part of the `TNode.insertBeforeIndex`.\n * @param existingTNodes internal state for `addTNodeAndUpdateInsertBeforeIndex`.\n * @param lView Current `LView` needed to allocate space in i18n range.\n * @param createOpCodes Array storing `I18nCreateOpCodes` where new opCodes will be added.\n * @param text Text to be added when the `Text` or `Comment` node will be created.\n * @param isICU true if a `Comment` node for ICU (instead of `Text`) node should be created.\n */\nfunction createTNodeAndAddOpCode(\n    tView: TView, rootTNode: TNode|null, existingTNodes: TNode[], lView: LView,\n    createOpCodes: I18nCreateOpCodes, text: string|null, isICU: boolean): TNode {\n  const i18nNodeIdx = allocExpando(tView, lView, 1, null);\n  let opCode = i18nNodeIdx << I18nCreateOpCode.SHIFT;\n  let parentTNode = getCurrentParentTNode();\n\n  if (rootTNode === parentTNode) {\n    // FIXME(misko): A null `parentTNode` should represent when we fall of the `LView` boundary.\n    // (there is no parent), but in some circumstances (because we are inconsistent about how we set\n    // `previousOrParentTNode`) it could point to `rootTNode` So this is a work around.\n    parentTNode = null;\n  }\n  if (parentTNode === null) {\n    // If we don't have a parent that means that we can eagerly add nodes.\n    // If we have a parent than these nodes can't be added now (as the parent has not been created\n    // yet) and instead the `parentTNode` is responsible for adding it. See\n    // `TNode.insertBeforeIndex`\n    opCode |= I18nCreateOpCode.APPEND_EAGERLY;\n  }\n  if (isICU) {\n    opCode |= I18nCreateOpCode.COMMENT;\n    ensureIcuContainerVisitorLoaded(loadIcuContainerVisitor);\n  }\n  createOpCodes.push(opCode, text === null ? '' : text);\n  // We store `{{?}}` so that when looking at debug `TNodeType.template` we can see where the\n  // bindings are.\n  const tNode = createTNodeAtIndex(\n      tView, i18nNodeIdx, isICU ? TNodeType.Icu : TNodeType.Text,\n      text === null ? (ngDevMode ? '{{?}}' : '') : text, null);\n  addTNodeAndUpdateInsertBeforeIndex(existingTNodes, tNode);\n  const tNodeIdx = tNode.index;\n  setCurrentTNode(tNode, false /* Text nodes are self closing */);\n  if (parentTNode !== null && rootTNode !== parentTNode) {\n    // We are a child of deeper node (rather than a direct child of `i18nStart` instruction.)\n    // We have to make sure to add ourselves to the parent.\n    setTNodeInsertBeforeIndex(parentTNode, tNodeIdx);\n  }\n  return tNode;\n}\n\n/**\n * Processes text node in i18n block.\n *\n * Text nodes can have:\n * - Create instruction in `createOpCodes` for creating the text node.\n * - Allocate spec for text node in i18n range of `LView`\n * - If contains binding:\n *    - bindings => allocate space in i18n range of `LView` to store the binding value.\n *    - populate `updateOpCodes` with update instructions.\n *\n * @param tView Current `TView`\n * @param rootTNode Root `TNode` of the i18n block. This node determines if the new TNode will\n *     be added as part of the `i18nStart` instruction or as part of the\n *     `TNode.insertBeforeIndex`.\n * @param existingTNodes internal state for `addTNodeAndUpdateInsertBeforeIndex`.\n * @param createOpCodes Location where the creation OpCodes will be stored.\n * @param lView Current `LView`\n * @param text The translated text (which may contain binding)\n */\nfunction i18nStartFirstCreatePassProcessTextNode(\n    tView: TView, rootTNode: TNode|null, existingTNodes: TNode[], createOpCodes: I18nCreateOpCodes,\n    updateOpCodes: I18nUpdateOpCodes, lView: LView, text: string): void {\n  const hasBinding = text.match(BINDING_REGEXP);\n  const tNode = createTNodeAndAddOpCode(\n      tView, rootTNode, existingTNodes, lView, createOpCodes, hasBinding ? null : text, false);\n  if (hasBinding) {\n    generateBindingUpdateOpCodes(updateOpCodes, text, tNode.index, null, 0, null);\n  }\n}\n\n/**\n * See `i18nAttributes` above.\n */\nexport function i18nAttributesFirstPass(tView: TView, index: number, values: string[]) {\n  const previousElement = getCurrentTNode()!;\n  const previousElementIndex = previousElement.index;\n  const updateOpCodes: I18nUpdateOpCodes = [] as any;\n  if (ngDevMode) {\n    attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);\n  }\n  if (tView.firstCreatePass && tView.data[index] === null) {\n    for (let i = 0; i < values.length; i += 2) {\n      const attrName = values[i];\n      const message = values[i + 1];\n\n      if (message !== '') {\n        // Check if attribute value contains an ICU and throw an error if that's the case.\n        // ICUs in element attributes are not supported.\n        // Note: we intentionally retain the error here by not using `ngDevMode`, because\n        // the `value` can change based on the locale and users aren't guaranteed to hit\n        // an invalid string while they're developing.\n        if (ICU_REGEXP.test(message)) {\n          throw new Error(\n              `ICU expressions are not supported in attributes. Message: \"${message}\".`);\n        }\n\n        // i18n attributes that hit this code path are guaranteed to have bindings, because\n        // the compiler treats static i18n attributes as regular attribute bindings.\n        // Since this may not be the first i18n attribute on this element we need to pass in how\n        // many previous bindings there have already been.\n        generateBindingUpdateOpCodes(\n            updateOpCodes, message, previousElementIndex, attrName, countBindings(updateOpCodes),\n            null);\n      }\n    }\n    tView.data[index] = updateOpCodes;\n  }\n}\n\n\n/**\n * Generate the OpCodes to update the bindings of a string.\n *\n * @param updateOpCodes Place where the update opcodes will be stored.\n * @param str The string containing the bindings.\n * @param destinationNode Index of the destination node which will receive the binding.\n * @param attrName Name of the attribute, if the string belongs to an attribute.\n * @param sanitizeFn Sanitization function used to sanitize the string after update, if necessary.\n * @param bindingStart The lView index of the next expression that can be bound via an opCode.\n * @returns The mask value for these bindings\n */\nfunction generateBindingUpdateOpCodes(\n    updateOpCodes: I18nUpdateOpCodes, str: string, destinationNode: number, attrName: string|null,\n    bindingStart: number, sanitizeFn: SanitizerFn|null): number {\n  ngDevMode &&\n      assertGreaterThanOrEqual(\n          destinationNode, HEADER_OFFSET, 'Index must be in absolute LView offset');\n  const maskIndex = updateOpCodes.length;  // Location of mask\n  const sizeIndex = maskIndex + 1;         // location of size for skipping\n  updateOpCodes.push(null, null);          // Alloc space for mask and size\n  const startIndex = maskIndex + 2;        // location of first allocation.\n  if (ngDevMode) {\n    attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);\n  }\n  const textParts = str.split(BINDING_REGEXP);\n  let mask = 0;\n\n  for (let j = 0; j < textParts.length; j++) {\n    const textValue = textParts[j];\n\n    if (j & 1) {\n      // Odd indexes are bindings\n      const bindingIndex = bindingStart + parseInt(textValue, 10);\n      updateOpCodes.push(-1 - bindingIndex);\n      mask = mask | toMaskBit(bindingIndex);\n    } else if (textValue !== '') {\n      // Even indexes are text\n      updateOpCodes.push(textValue);\n    }\n  }\n\n  updateOpCodes.push(\n      destinationNode << I18nUpdateOpCode.SHIFT_REF |\n      (attrName ? I18nUpdateOpCode.Attr : I18nUpdateOpCode.Text));\n  if (attrName) {\n    updateOpCodes.push(attrName, sanitizeFn);\n  }\n  updateOpCodes[maskIndex] = mask;\n  updateOpCodes[sizeIndex] = updateOpCodes.length - startIndex;\n  return mask;\n}\n\n/**\n * Count the number of bindings in the given `opCodes`.\n *\n * It could be possible to speed this up, by passing the number of bindings found back from\n * `generateBindingUpdateOpCodes()` to `i18nAttributesFirstPass()` but this would then require more\n * complexity in the code and/or transient objects to be created.\n *\n * Since this function is only called once when the template is instantiated, is trivial in the\n * first instance (since `opCodes` will be an empty array), and it is not common for elements to\n * contain multiple i18n bound attributes, it seems like this is a reasonable compromise.\n */\nfunction countBindings(opCodes: I18nUpdateOpCodes): number {\n  let count = 0;\n  for (let i = 0; i < opCodes.length; i++) {\n    const opCode = opCodes[i];\n    // Bindings are negative numbers.\n    if (typeof opCode === 'number' && opCode < 0) {\n      count++;\n    }\n  }\n  return count;\n}\n\n/**\n * Convert binding index to mask bit.\n *\n * Each index represents a single bit on the bit-mask. Because bit-mask only has 32 bits, we make\n * the 32nd bit share all masks for all bindings higher than 32. Since it is extremely rare to\n * have more than 32 bindings this will be hit very rarely. The downside of hitting this corner\n * case is that we will execute binding code more often than necessary. (penalty of performance)\n */\nfunction toMaskBit(bindingIndex: number): number {\n  return 1 << Math.min(bindingIndex, 31);\n}\n\nexport function isRootTemplateMessage(subTemplateIndex: number): subTemplateIndex is - 1 {\n  return subTemplateIndex === -1;\n}\n\n\n/**\n * Removes everything inside the sub-templates of a message.\n */\nfunction removeInnerTemplateTranslation(message: string): string {\n  let match;\n  let res = '';\n  let index = 0;\n  let inTemplate = false;\n  let tagMatched;\n\n  while ((match = SUBTEMPLATE_REGEXP.exec(message)) !== null) {\n    if (!inTemplate) {\n      res += message.substring(index, match.index + match[0].length);\n      tagMatched = match[1];\n      inTemplate = true;\n    } else {\n      if (match[0] === `${MARKER}/*${tagMatched}${MARKER}`) {\n        index = match.index;\n        inTemplate = false;\n      }\n    }\n  }\n\n  ngDevMode &&\n      assertEqual(\n          inTemplate, false,\n          `Tag mismatch: unable to find the end of the sub-template in the translation \"${\n              message}\"`);\n\n  res += message.substr(index);\n  return res;\n}\n\n\n/**\n * Extracts a part of a message and removes the rest.\n *\n * This method is used for extracting a part of the message associated with a template. A\n * translated message can span multiple templates.\n *\n * Example:\n * ```\n * <div i18n>Translate <span *ngIf>me</span>!</div>\n * ```\n *\n * @param message The message to crop\n * @param subTemplateIndex Index of the sub-template to extract. If undefined it returns the\n * external template and removes all sub-templates.\n */\nexport function getTranslationForTemplate(message: string, subTemplateIndex: number) {\n  if (isRootTemplateMessage(subTemplateIndex)) {\n    // We want the root template message, ignore all sub-templates\n    return removeInnerTemplateTranslation(message);\n  } else {\n    // We want a specific sub-template\n    const start =\n        message.indexOf(`:${subTemplateIndex}${MARKER}`) + 2 + subTemplateIndex.toString().length;\n    const end = message.search(new RegExp(`${MARKER}\\\\/\\\\*\\\\d+:${subTemplateIndex}${MARKER}`));\n    return removeInnerTemplateTranslation(message.substring(start, end));\n  }\n}\n\n/**\n * Generate the OpCodes for ICU expressions.\n *\n * @param icuExpression\n * @param index Index where the anchor is stored and an optional `TIcuContainerNode`\n *   - `lView[anchorIdx]` points to a `Comment` node representing the anchor for the ICU.\n *   - `tView.data[anchorIdx]` points to the `TIcuContainerNode` if ICU is root (`null` otherwise)\n */\nexport function icuStart(\n    tView: TView, lView: LView, updateOpCodes: I18nUpdateOpCodes, parentIdx: number,\n    icuExpression: IcuExpression, anchorIdx: number) {\n  ngDevMode && assertDefined(icuExpression, 'ICU expression must be defined');\n  let bindingMask = 0;\n  const tIcu: TIcu = {\n    type: icuExpression.type,\n    currentCaseLViewIndex: allocExpando(tView, lView, 1, null),\n    anchorIdx,\n    cases: [],\n    create: [],\n    remove: [],\n    update: []\n  };\n  addUpdateIcuSwitch(updateOpCodes, icuExpression, anchorIdx);\n  setTIcu(tView, anchorIdx, tIcu);\n  const values = icuExpression.values;\n  for (let i = 0; i < values.length; i++) {\n    // Each value is an array of strings & other ICU expressions\n    const valueArr = values[i];\n    const nestedIcus: IcuExpression[] = [];\n    for (let j = 0; j < valueArr.length; j++) {\n      const value = valueArr[j];\n      if (typeof value !== 'string') {\n        // It is an nested ICU expression\n        const icuIndex = nestedIcus.push(value as IcuExpression) - 1;\n        // Replace nested ICU expression by a comment node\n        valueArr[j] = `<!--�${icuIndex}�-->`;\n      }\n    }\n    bindingMask = parseIcuCase(\n                      tView, tIcu, lView, updateOpCodes, parentIdx, icuExpression.cases[i],\n                      valueArr.join(''), nestedIcus) |\n        bindingMask;\n  }\n  if (bindingMask) {\n    addUpdateIcuUpdate(updateOpCodes, bindingMask, anchorIdx);\n  }\n}\n\n/**\n * Parses text containing an ICU expression and produces a JSON object for it.\n * Original code from closure library, modified for Angular.\n *\n * @param pattern Text containing an ICU expression that needs to be parsed.\n *\n */\nexport function parseICUBlock(pattern: string): IcuExpression {\n  const cases = [];\n  const values: (string|IcuExpression)[][] = [];\n  let icuType = IcuType.plural;\n  let mainBinding = 0;\n  pattern = pattern.replace(ICU_BLOCK_REGEXP, function(str: string, binding: string, type: string) {\n    if (type === 'select') {\n      icuType = IcuType.select;\n    } else {\n      icuType = IcuType.plural;\n    }\n    mainBinding = parseInt(binding.substr(1), 10);\n    return '';\n  });\n\n  const parts = i18nParseTextIntoPartsAndICU(pattern) as string[];\n  // Looking for (key block)+ sequence. One of the keys has to be \"other\".\n  for (let pos = 0; pos < parts.length;) {\n    let key = parts[pos++].trim();\n    if (icuType === IcuType.plural) {\n      // Key can be \"=x\", we just want \"x\"\n      key = key.replace(/\\s*(?:=)?(\\w+)\\s*/, '$1');\n    }\n    if (key.length) {\n      cases.push(key);\n    }\n\n    const blocks = i18nParseTextIntoPartsAndICU(parts[pos++]) as string[];\n    if (cases.length > values.length) {\n      values.push(blocks);\n    }\n  }\n\n  // TODO(ocombe): support ICU expressions in attributes, see #21615\n  return {type: icuType, mainBinding: mainBinding, cases, values};\n}\n\n\n/**\n * Breaks pattern into strings and top level {...} blocks.\n * Can be used to break a message into text and ICU expressions, or to break an ICU expression\n * into keys and cases. Original code from closure library, modified for Angular.\n *\n * @param pattern (sub)Pattern to be broken.\n * @returns An `Array<string|IcuExpression>` where:\n *   - odd positions: `string` => text between ICU expressions\n *   - even positions: `ICUExpression` => ICU expression parsed into `ICUExpression` record.\n */\nexport function i18nParseTextIntoPartsAndICU(pattern: string): (string|IcuExpression)[] {\n  if (!pattern) {\n    return [];\n  }\n\n  let prevPos = 0;\n  const braceStack = [];\n  const results: (string|IcuExpression)[] = [];\n  const braces = /[{}]/g;\n  // lastIndex doesn't get set to 0 so we have to.\n  braces.lastIndex = 0;\n\n  let match;\n  while (match = braces.exec(pattern)) {\n    const pos = match.index;\n    if (match[0] == '}') {\n      braceStack.pop();\n\n      if (braceStack.length == 0) {\n        // End of the block.\n        const block = pattern.substring(prevPos, pos);\n        if (ICU_BLOCK_REGEXP.test(block)) {\n          results.push(parseICUBlock(block));\n        } else {\n          results.push(block);\n        }\n\n        prevPos = pos + 1;\n      }\n    } else {\n      if (braceStack.length == 0) {\n        const substring = pattern.substring(prevPos, pos);\n        results.push(substring);\n        prevPos = pos + 1;\n      }\n      braceStack.push('{');\n    }\n  }\n\n  const substring = pattern.substring(prevPos);\n  results.push(substring);\n  return results;\n}\n\n\n/**\n * Parses a node, its children and its siblings, and generates the mutate & update OpCodes.\n *\n */\nexport function parseIcuCase(\n    tView: TView, tIcu: TIcu, lView: LView, updateOpCodes: I18nUpdateOpCodes, parentIdx: number,\n    caseName: string, unsafeCaseHtml: string, nestedIcus: IcuExpression[]): number {\n  const create: IcuCreateOpCodes = [] as any;\n  const remove: I18nRemoveOpCodes = [] as any;\n  const update: I18nUpdateOpCodes = [] as any;\n  if (ngDevMode) {\n    attachDebugGetter(create, icuCreateOpCodesToString);\n    attachDebugGetter(remove, i18nRemoveOpCodesToString);\n    attachDebugGetter(update, i18nUpdateOpCodesToString);\n  }\n  tIcu.cases.push(caseName);\n  tIcu.create.push(create);\n  tIcu.remove.push(remove);\n  tIcu.update.push(update);\n\n  const inertBodyHelper = getInertBodyHelper(getDocument());\n  const inertBodyElement = inertBodyHelper.getInertBodyElement(unsafeCaseHtml);\n  ngDevMode && assertDefined(inertBodyElement, 'Unable to generate inert body element');\n  const inertRootNode = getTemplateContent(inertBodyElement!) as Element || inertBodyElement;\n  if (inertRootNode) {\n    return walkIcuTree(\n        tView, tIcu, lView, updateOpCodes, create, remove, update, inertRootNode, parentIdx,\n        nestedIcus, 0);\n  } else {\n    return 0;\n  }\n}\n\nfunction walkIcuTree(\n    tView: TView, tIcu: TIcu, lView: LView, sharedUpdateOpCodes: I18nUpdateOpCodes,\n    create: IcuCreateOpCodes, remove: I18nRemoveOpCodes, update: I18nUpdateOpCodes,\n    parentNode: Element, parentIdx: number, nestedIcus: IcuExpression[], depth: number): number {\n  let bindingMask = 0;\n  let currentNode = parentNode.firstChild;\n  while (currentNode) {\n    const newIndex = allocExpando(tView, lView, 1, null);\n    switch (currentNode.nodeType) {\n      case Node.ELEMENT_NODE:\n        const element = currentNode as Element;\n        const tagName = element.tagName.toLowerCase();\n        if (VALID_ELEMENTS.hasOwnProperty(tagName)) {\n          addCreateNodeAndAppend(create, ELEMENT_MARKER, tagName, parentIdx, newIndex);\n          tView.data[newIndex] = tagName;\n          const elAttrs = element.attributes;\n          for (let i = 0; i < elAttrs.length; i++) {\n            const attr = elAttrs.item(i)!;\n            const lowerAttrName = attr.name.toLowerCase();\n            const hasBinding = !!attr.value.match(BINDING_REGEXP);\n            // we assume the input string is safe, unless it's using a binding\n            if (hasBinding) {\n              if (VALID_ATTRS.hasOwnProperty(lowerAttrName)) {\n                if (URI_ATTRS[lowerAttrName]) {\n                  generateBindingUpdateOpCodes(\n                      update, attr.value, newIndex, attr.name, 0, _sanitizeUrl);\n                } else if (SRCSET_ATTRS[lowerAttrName]) {\n                  generateBindingUpdateOpCodes(\n                      update, attr.value, newIndex, attr.name, 0, sanitizeSrcset);\n                } else {\n                  generateBindingUpdateOpCodes(update, attr.value, newIndex, attr.name, 0, null);\n                }\n              } else {\n                ngDevMode &&\n                    console.warn(\n                        `WARNING: ignoring unsafe attribute value ` +\n                        `${lowerAttrName} on element ${tagName} ` +\n                        `(see https://g.co/ng/security#xss)`);\n              }\n            } else {\n              addCreateAttribute(create, newIndex, attr);\n            }\n          }\n          // Parse the children of this node (if any)\n          bindingMask = walkIcuTree(\n                            tView, tIcu, lView, sharedUpdateOpCodes, create, remove, update,\n                            currentNode as Element, newIndex, nestedIcus, depth + 1) |\n              bindingMask;\n          addRemoveNode(remove, newIndex, depth);\n        }\n        break;\n      case Node.TEXT_NODE:\n        const value = currentNode.textContent || '';\n        const hasBinding = value.match(BINDING_REGEXP);\n        addCreateNodeAndAppend(create, null, hasBinding ? '' : value, parentIdx, newIndex);\n        addRemoveNode(remove, newIndex, depth);\n        if (hasBinding) {\n          bindingMask =\n              generateBindingUpdateOpCodes(update, value, newIndex, null, 0, null) | bindingMask;\n        }\n        break;\n      case Node.COMMENT_NODE:\n        // Check if the comment node is a placeholder for a nested ICU\n        const isNestedIcu = NESTED_ICU.exec(currentNode.textContent || '');\n        if (isNestedIcu) {\n          const nestedIcuIndex = parseInt(isNestedIcu[1], 10);\n          const icuExpression: IcuExpression = nestedIcus[nestedIcuIndex];\n          // Create the comment node that will anchor the ICU expression\n          addCreateNodeAndAppend(\n              create, ICU_MARKER, ngDevMode ? `nested ICU ${nestedIcuIndex}` : '', parentIdx,\n              newIndex);\n          icuStart(tView, lView, sharedUpdateOpCodes, parentIdx, icuExpression, newIndex);\n          addRemoveNestedIcu(remove, newIndex, depth);\n        }\n        break;\n    }\n    currentNode = currentNode.nextSibling;\n  }\n  return bindingMask;\n}\n\nfunction addRemoveNode(remove: I18nRemoveOpCodes, index: number, depth: number) {\n  if (depth === 0) {\n    remove.push(index);\n  }\n}\n\nfunction addRemoveNestedIcu(remove: I18nRemoveOpCodes, index: number, depth: number) {\n  if (depth === 0) {\n    remove.push(~index);  // remove ICU at `index`\n    remove.push(index);   // remove ICU comment at `index`\n  }\n}\n\nfunction addUpdateIcuSwitch(\n    update: I18nUpdateOpCodes, icuExpression: IcuExpression, index: number) {\n  update.push(\n      toMaskBit(icuExpression.mainBinding), 2, -1 - icuExpression.mainBinding,\n      index << I18nUpdateOpCode.SHIFT_REF | I18nUpdateOpCode.IcuSwitch);\n}\n\nfunction addUpdateIcuUpdate(update: I18nUpdateOpCodes, bindingMask: number, index: number) {\n  update.push(bindingMask, 1, index << I18nUpdateOpCode.SHIFT_REF | I18nUpdateOpCode.IcuUpdate);\n}\n\nfunction addCreateNodeAndAppend(\n    create: IcuCreateOpCodes, marker: null|ICU_MARKER|ELEMENT_MARKER, text: string,\n    appendToParentIdx: number, createAtIdx: number) {\n  if (marker !== null) {\n    create.push(marker);\n  }\n  create.push(\n      text, createAtIdx,\n      icuCreateOpCode(IcuCreateOpCode.AppendChild, appendToParentIdx, createAtIdx));\n}\n\nfunction addCreateAttribute(create: IcuCreateOpCodes, newIndex: number, attr: Attr) {\n  create.push(newIndex << IcuCreateOpCode.SHIFT_REF | IcuCreateOpCode.Attr, attr.name, attr.value);\n}\n"]} |
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