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 | const TAG_TO_PLACEHOLDER_NAMES = {
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9 | 'A': 'LINK',
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10 | 'B': 'BOLD_TEXT',
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11 | 'BR': 'LINE_BREAK',
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12 | 'EM': 'EMPHASISED_TEXT',
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13 | 'H1': 'HEADING_LEVEL1',
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14 | 'H2': 'HEADING_LEVEL2',
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15 | 'H3': 'HEADING_LEVEL3',
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16 | 'H4': 'HEADING_LEVEL4',
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17 | 'H5': 'HEADING_LEVEL5',
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18 | 'H6': 'HEADING_LEVEL6',
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19 | 'HR': 'HORIZONTAL_RULE',
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20 | 'I': 'ITALIC_TEXT',
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21 | 'LI': 'LIST_ITEM',
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22 | 'LINK': 'MEDIA_LINK',
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23 | 'OL': 'ORDERED_LIST',
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24 | 'P': 'PARAGRAPH',
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25 | 'Q': 'QUOTATION',
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26 | 'S': 'STRIKETHROUGH_TEXT',
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27 | 'SMALL': 'SMALL_TEXT',
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28 | 'SUB': 'SUBSTRIPT',
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29 | 'SUP': 'SUPERSCRIPT',
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30 | 'TBODY': 'TABLE_BODY',
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31 | 'TD': 'TABLE_CELL',
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32 | 'TFOOT': 'TABLE_FOOTER',
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33 | 'TH': 'TABLE_HEADER_CELL',
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34 | 'THEAD': 'TABLE_HEADER',
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35 | 'TR': 'TABLE_ROW',
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36 | 'TT': 'MONOSPACED_TEXT',
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37 | 'U': 'UNDERLINED_TEXT',
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38 | 'UL': 'UNORDERED_LIST',
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39 | };
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40 | /**
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41 | * Creates unique names for placeholder with different content.
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42 | *
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43 | * Returns the same placeholder name when the content is identical.
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44 | */
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45 | export class PlaceholderRegistry {
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46 | constructor() {
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47 | // Count the occurrence of the base name top generate a unique name
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48 | this._placeHolderNameCounts = {};
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49 | // Maps signature to placeholder names
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50 | this._signatureToName = {};
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51 | }
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52 | getStartTagPlaceholderName(tag, attrs, isVoid) {
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53 | const signature = this._hashTag(tag, attrs, isVoid);
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54 | if (this._signatureToName[signature]) {
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55 | return this._signatureToName[signature];
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56 | }
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57 | const upperTag = tag.toUpperCase();
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58 | const baseName = TAG_TO_PLACEHOLDER_NAMES[upperTag] || `TAG_${upperTag}`;
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59 | const name = this._generateUniqueName(isVoid ? baseName : `START_${baseName}`);
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60 | this._signatureToName[signature] = name;
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61 | return name;
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62 | }
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63 | getCloseTagPlaceholderName(tag) {
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64 | const signature = this._hashClosingTag(tag);
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65 | if (this._signatureToName[signature]) {
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66 | return this._signatureToName[signature];
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67 | }
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68 | const upperTag = tag.toUpperCase();
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69 | const baseName = TAG_TO_PLACEHOLDER_NAMES[upperTag] || `TAG_${upperTag}`;
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70 | const name = this._generateUniqueName(`CLOSE_${baseName}`);
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71 | this._signatureToName[signature] = name;
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72 | return name;
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73 | }
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74 | getPlaceholderName(name, content) {
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75 | const upperName = name.toUpperCase();
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76 | const signature = `PH: ${upperName}=${content}`;
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77 | if (this._signatureToName[signature]) {
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78 | return this._signatureToName[signature];
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79 | }
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80 | const uniqueName = this._generateUniqueName(upperName);
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81 | this._signatureToName[signature] = uniqueName;
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82 | return uniqueName;
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83 | }
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84 | getUniquePlaceholder(name) {
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85 | return this._generateUniqueName(name.toUpperCase());
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86 | }
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87 | // Generate a hash for a tag - does not take attribute order into account
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88 | _hashTag(tag, attrs, isVoid) {
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89 | const start = `<${tag}`;
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90 | const strAttrs = Object.keys(attrs).sort().map((name) => ` ${name}=${attrs[name]}`).join('');
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91 | const end = isVoid ? '/>' : `></${tag}>`;
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92 | return start + strAttrs + end;
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93 | }
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94 | _hashClosingTag(tag) {
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95 | return this._hashTag(`/${tag}`, {}, false);
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96 | }
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97 | _generateUniqueName(base) {
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98 | const seen = this._placeHolderNameCounts.hasOwnProperty(base);
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99 | if (!seen) {
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100 | this._placeHolderNameCounts[base] = 1;
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101 | return base;
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102 | }
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103 | const id = this._placeHolderNameCounts[base];
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104 | this._placeHolderNameCounts[base] = id + 1;
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105 | return `${base}_${id}`;
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106 | }
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107 | }
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108 | //# 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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nconst TAG_TO_PLACEHOLDER_NAMES: {[k: string]: string} = {\n  'A': 'LINK',\n  'B': 'BOLD_TEXT',\n  'BR': 'LINE_BREAK',\n  'EM': 'EMPHASISED_TEXT',\n  'H1': 'HEADING_LEVEL1',\n  'H2': 'HEADING_LEVEL2',\n  'H3': 'HEADING_LEVEL3',\n  'H4': 'HEADING_LEVEL4',\n  'H5': 'HEADING_LEVEL5',\n  'H6': 'HEADING_LEVEL6',\n  'HR': 'HORIZONTAL_RULE',\n  'I': 'ITALIC_TEXT',\n  'LI': 'LIST_ITEM',\n  'LINK': 'MEDIA_LINK',\n  'OL': 'ORDERED_LIST',\n  'P': 'PARAGRAPH',\n  'Q': 'QUOTATION',\n  'S': 'STRIKETHROUGH_TEXT',\n  'SMALL': 'SMALL_TEXT',\n  'SUB': 'SUBSTRIPT',\n  'SUP': 'SUPERSCRIPT',\n  'TBODY': 'TABLE_BODY',\n  'TD': 'TABLE_CELL',\n  'TFOOT': 'TABLE_FOOTER',\n  'TH': 'TABLE_HEADER_CELL',\n  'THEAD': 'TABLE_HEADER',\n  'TR': 'TABLE_ROW',\n  'TT': 'MONOSPACED_TEXT',\n  'U': 'UNDERLINED_TEXT',\n  'UL': 'UNORDERED_LIST',\n};\n\n/**\n * Creates unique names for placeholder with different content.\n *\n * Returns the same placeholder name when the content is identical.\n */\nexport class PlaceholderRegistry {\n  // Count the occurrence of the base name top generate a unique name\n  private _placeHolderNameCounts: {[k: string]: number} = {};\n  // Maps signature to placeholder names\n  private _signatureToName: {[k: string]: string} = {};\n\n  getStartTagPlaceholderName(tag: string, attrs: {[k: string]: string}, isVoid: boolean): string {\n    const signature = this._hashTag(tag, attrs, isVoid);\n    if (this._signatureToName[signature]) {\n      return this._signatureToName[signature];\n    }\n\n    const upperTag = tag.toUpperCase();\n    const baseName = TAG_TO_PLACEHOLDER_NAMES[upperTag] || `TAG_${upperTag}`;\n    const name = this._generateUniqueName(isVoid ? baseName : `START_${baseName}`);\n\n    this._signatureToName[signature] = name;\n\n    return name;\n  }\n\n  getCloseTagPlaceholderName(tag: string): string {\n    const signature = this._hashClosingTag(tag);\n    if (this._signatureToName[signature]) {\n      return this._signatureToName[signature];\n    }\n\n    const upperTag = tag.toUpperCase();\n    const baseName = TAG_TO_PLACEHOLDER_NAMES[upperTag] || `TAG_${upperTag}`;\n    const name = this._generateUniqueName(`CLOSE_${baseName}`);\n\n    this._signatureToName[signature] = name;\n\n    return name;\n  }\n\n  getPlaceholderName(name: string, content: string): string {\n    const upperName = name.toUpperCase();\n    const signature = `PH: ${upperName}=${content}`;\n    if (this._signatureToName[signature]) {\n      return this._signatureToName[signature];\n    }\n\n    const uniqueName = this._generateUniqueName(upperName);\n    this._signatureToName[signature] = uniqueName;\n\n    return uniqueName;\n  }\n\n  getUniquePlaceholder(name: string): string {\n    return this._generateUniqueName(name.toUpperCase());\n  }\n\n  // Generate a hash for a tag - does not take attribute order into account\n  private _hashTag(tag: string, attrs: {[k: string]: string}, isVoid: boolean): string {\n    const start = `<${tag}`;\n    const strAttrs = Object.keys(attrs).sort().map((name) => ` ${name}=${attrs[name]}`).join('');\n    const end = isVoid ? '/>' : `></${tag}>`;\n\n    return start + strAttrs + end;\n  }\n\n  private _hashClosingTag(tag: string): string {\n    return this._hashTag(`/${tag}`, {}, false);\n  }\n\n  private _generateUniqueName(base: string): string {\n    const seen = this._placeHolderNameCounts.hasOwnProperty(base);\n    if (!seen) {\n      this._placeHolderNameCounts[base] = 1;\n      return base;\n    }\n\n    const id = this._placeHolderNameCounts[base];\n    this._placeHolderNameCounts[base] = id + 1;\n    return `${base}_${id}`;\n  }\n}\n"]} |
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