UNPKG

23.3 kBJavaScriptView Raw
1/**
2 * @license
3 * Copyright Google LLC All Rights Reserved.
4 *
5 * Use of this source code is governed by an MIT-style license that can be
6 * found in the LICENSE file at https://angular.io/license
7 */
8import { TagContentType } from './tags';
9export class HtmlTagDefinition {
10 constructor({ closedByChildren, implicitNamespacePrefix, contentType = TagContentType.PARSABLE_DATA, closedByParent = false, isVoid = false, ignoreFirstLf = false, preventNamespaceInheritance = false } = {}) {
11 this.closedByChildren = {};
12 this.closedByParent = false;
13 this.canSelfClose = false;
14 if (closedByChildren && closedByChildren.length > 0) {
15 closedByChildren.forEach(tagName => this.closedByChildren[tagName] = true);
16 }
17 this.isVoid = isVoid;
18 this.closedByParent = closedByParent || isVoid;
19 this.implicitNamespacePrefix = implicitNamespacePrefix || null;
20 this.contentType = contentType;
21 this.ignoreFirstLf = ignoreFirstLf;
22 this.preventNamespaceInheritance = preventNamespaceInheritance;
23 }
24 isClosedByChild(name) {
25 return this.isVoid || name.toLowerCase() in this.closedByChildren;
26 }
27 getContentType(prefix) {
28 if (typeof this.contentType === 'object') {
29 const overrideType = prefix === undefined ? undefined : this.contentType[prefix];
30 return overrideType ?? this.contentType.default;
31 }
32 return this.contentType;
33 }
34}
35let _DEFAULT_TAG_DEFINITION;
36// see https://www.w3.org/TR/html51/syntax.html#optional-tags
37// This implementation does not fully conform to the HTML5 spec.
38let TAG_DEFINITIONS;
39export function getHtmlTagDefinition(tagName) {
40 if (!TAG_DEFINITIONS) {
41 _DEFAULT_TAG_DEFINITION = new HtmlTagDefinition();
42 TAG_DEFINITIONS = {
43 'base': new HtmlTagDefinition({ isVoid: true }),
44 'meta': new HtmlTagDefinition({ isVoid: true }),
45 'area': new HtmlTagDefinition({ isVoid: true }),
46 'embed': new HtmlTagDefinition({ isVoid: true }),
47 'link': new HtmlTagDefinition({ isVoid: true }),
48 'img': new HtmlTagDefinition({ isVoid: true }),
49 'input': new HtmlTagDefinition({ isVoid: true }),
50 'param': new HtmlTagDefinition({ isVoid: true }),
51 'hr': new HtmlTagDefinition({ isVoid: true }),
52 'br': new HtmlTagDefinition({ isVoid: true }),
53 'source': new HtmlTagDefinition({ isVoid: true }),
54 'track': new HtmlTagDefinition({ isVoid: true }),
55 'wbr': new HtmlTagDefinition({ isVoid: true }),
56 'p': new HtmlTagDefinition({
57 closedByChildren: [
58 'address', 'article', 'aside', 'blockquote', 'div', 'dl', 'fieldset',
59 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5',
60 'h6', 'header', 'hgroup', 'hr', 'main', 'nav', 'ol',
61 'p', 'pre', 'section', 'table', 'ul'
62 ],
63 closedByParent: true
64 }),
65 'thead': new HtmlTagDefinition({ closedByChildren: ['tbody', 'tfoot'] }),
66 'tbody': new HtmlTagDefinition({ closedByChildren: ['tbody', 'tfoot'], closedByParent: true }),
67 'tfoot': new HtmlTagDefinition({ closedByChildren: ['tbody'], closedByParent: true }),
68 'tr': new HtmlTagDefinition({ closedByChildren: ['tr'], closedByParent: true }),
69 'td': new HtmlTagDefinition({ closedByChildren: ['td', 'th'], closedByParent: true }),
70 'th': new HtmlTagDefinition({ closedByChildren: ['td', 'th'], closedByParent: true }),
71 'col': new HtmlTagDefinition({ isVoid: true }),
72 'svg': new HtmlTagDefinition({ implicitNamespacePrefix: 'svg' }),
73 'foreignObject': new HtmlTagDefinition({
74 // Usually the implicit namespace here would be redundant since it will be inherited from
75 // the parent `svg`, but we have to do it for `foreignObject`, because the way the parser
76 // works is that the parent node of an end tag is its own start tag which means that
77 // the `preventNamespaceInheritance` on `foreignObject` would have it default to the
78 // implicit namespace which is `html`, unless specified otherwise.
79 implicitNamespacePrefix: 'svg',
80 // We want to prevent children of foreignObject from inheriting its namespace, because
81 // the point of the element is to allow nodes from other namespaces to be inserted.
82 preventNamespaceInheritance: true,
83 }),
84 'math': new HtmlTagDefinition({ implicitNamespacePrefix: 'math' }),
85 'li': new HtmlTagDefinition({ closedByChildren: ['li'], closedByParent: true }),
86 'dt': new HtmlTagDefinition({ closedByChildren: ['dt', 'dd'] }),
87 'dd': new HtmlTagDefinition({ closedByChildren: ['dt', 'dd'], closedByParent: true }),
88 'rb': new HtmlTagDefinition({ closedByChildren: ['rb', 'rt', 'rtc', 'rp'], closedByParent: true }),
89 'rt': new HtmlTagDefinition({ closedByChildren: ['rb', 'rt', 'rtc', 'rp'], closedByParent: true }),
90 'rtc': new HtmlTagDefinition({ closedByChildren: ['rb', 'rtc', 'rp'], closedByParent: true }),
91 'rp': new HtmlTagDefinition({ closedByChildren: ['rb', 'rt', 'rtc', 'rp'], closedByParent: true }),
92 'optgroup': new HtmlTagDefinition({ closedByChildren: ['optgroup'], closedByParent: true }),
93 'option': new HtmlTagDefinition({ closedByChildren: ['option', 'optgroup'], closedByParent: true }),
94 'pre': new HtmlTagDefinition({ ignoreFirstLf: true }),
95 'listing': new HtmlTagDefinition({ ignoreFirstLf: true }),
96 'style': new HtmlTagDefinition({ contentType: TagContentType.RAW_TEXT }),
97 'script': new HtmlTagDefinition({ contentType: TagContentType.RAW_TEXT }),
98 'title': new HtmlTagDefinition({
99 // The browser supports two separate `title` tags which have to use
100 // a different content type: `HTMLTitleElement` and `SVGTitleElement`
101 contentType: { default: TagContentType.ESCAPABLE_RAW_TEXT, svg: TagContentType.PARSABLE_DATA }
102 }),
103 'textarea': new HtmlTagDefinition({ contentType: TagContentType.ESCAPABLE_RAW_TEXT, ignoreFirstLf: true }),
104 };
105 }
106 // We have to make both a case-sensitive and a case-insensitive lookup, because
107 // HTML tag names are case insensitive, whereas some SVG tags are case sensitive.
108 return TAG_DEFINITIONS[tagName] ?? TAG_DEFINITIONS[tagName.toLowerCase()] ??
109 _DEFAULT_TAG_DEFINITION;
110}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {TagContentType, TagDefinition} from './tags';\n\nexport class HtmlTagDefinition implements TagDefinition {\n  private closedByChildren: {[key: string]: boolean} = {};\n  private contentType: TagContentType|\n      {default: TagContentType, [namespace: string]: TagContentType};\n\n  closedByParent: boolean = false;\n  implicitNamespacePrefix: string|null;\n  isVoid: boolean;\n  ignoreFirstLf: boolean;\n  canSelfClose: boolean = false;\n  preventNamespaceInheritance: boolean;\n\n  constructor({\n    closedByChildren,\n    implicitNamespacePrefix,\n    contentType = TagContentType.PARSABLE_DATA,\n    closedByParent = false,\n    isVoid = false,\n    ignoreFirstLf = false,\n    preventNamespaceInheritance = false\n  }: {\n    closedByChildren?: string[],\n    closedByParent?: boolean,\n    implicitNamespacePrefix?: string,\n    contentType?: TagContentType|{default: TagContentType, [namespace: string]: TagContentType},\n    isVoid?: boolean,\n    ignoreFirstLf?: boolean,\n    preventNamespaceInheritance?: boolean\n  } = {}) {\n    if (closedByChildren && closedByChildren.length > 0) {\n      closedByChildren.forEach(tagName => this.closedByChildren[tagName] = true);\n    }\n    this.isVoid = isVoid;\n    this.closedByParent = closedByParent || isVoid;\n    this.implicitNamespacePrefix = implicitNamespacePrefix || null;\n    this.contentType = contentType;\n    this.ignoreFirstLf = ignoreFirstLf;\n    this.preventNamespaceInheritance = preventNamespaceInheritance;\n  }\n\n  isClosedByChild(name: string): boolean {\n    return this.isVoid || name.toLowerCase() in this.closedByChildren;\n  }\n\n  getContentType(prefix?: string): TagContentType {\n    if (typeof this.contentType === 'object') {\n      const overrideType = prefix === undefined ? undefined : this.contentType[prefix];\n      return overrideType ?? this.contentType.default;\n    }\n    return this.contentType;\n  }\n}\n\nlet _DEFAULT_TAG_DEFINITION!: HtmlTagDefinition;\n\n// see https://www.w3.org/TR/html51/syntax.html#optional-tags\n// This implementation does not fully conform to the HTML5 spec.\nlet TAG_DEFINITIONS!: {[key: string]: HtmlTagDefinition};\n\nexport function getHtmlTagDefinition(tagName: string): HtmlTagDefinition {\n  if (!TAG_DEFINITIONS) {\n    _DEFAULT_TAG_DEFINITION = new HtmlTagDefinition();\n    TAG_DEFINITIONS = {\n      'base': new HtmlTagDefinition({isVoid: true}),\n      'meta': new HtmlTagDefinition({isVoid: true}),\n      'area': new HtmlTagDefinition({isVoid: true}),\n      'embed': new HtmlTagDefinition({isVoid: true}),\n      'link': new HtmlTagDefinition({isVoid: true}),\n      'img': new HtmlTagDefinition({isVoid: true}),\n      'input': new HtmlTagDefinition({isVoid: true}),\n      'param': new HtmlTagDefinition({isVoid: true}),\n      'hr': new HtmlTagDefinition({isVoid: true}),\n      'br': new HtmlTagDefinition({isVoid: true}),\n      'source': new HtmlTagDefinition({isVoid: true}),\n      'track': new HtmlTagDefinition({isVoid: true}),\n      'wbr': new HtmlTagDefinition({isVoid: true}),\n      'p': new HtmlTagDefinition({\n        closedByChildren: [\n          'address', 'article', 'aside',   'blockquote', 'div',  'dl',  'fieldset',\n          'footer',  'form',    'h1',      'h2',         'h3',   'h4',  'h5',\n          'h6',      'header',  'hgroup',  'hr',         'main', 'nav', 'ol',\n          'p',       'pre',     'section', 'table',      'ul'\n        ],\n        closedByParent: true\n      }),\n      'thead': new HtmlTagDefinition({closedByChildren: ['tbody', 'tfoot']}),\n      'tbody': new HtmlTagDefinition({closedByChildren: ['tbody', 'tfoot'], closedByParent: true}),\n      'tfoot': new HtmlTagDefinition({closedByChildren: ['tbody'], closedByParent: true}),\n      'tr': new HtmlTagDefinition({closedByChildren: ['tr'], closedByParent: true}),\n      'td': new HtmlTagDefinition({closedByChildren: ['td', 'th'], closedByParent: true}),\n      'th': new HtmlTagDefinition({closedByChildren: ['td', 'th'], closedByParent: true}),\n      'col': new HtmlTagDefinition({isVoid: true}),\n      'svg': new HtmlTagDefinition({implicitNamespacePrefix: 'svg'}),\n      'foreignObject': new HtmlTagDefinition({\n        // Usually the implicit namespace here would be redundant since it will be inherited from\n        // the parent `svg`, but we have to do it for `foreignObject`, because the way the parser\n        // works is that the parent node of an end tag is its own start tag which means that\n        // the `preventNamespaceInheritance` on `foreignObject` would have it default to the\n        // implicit namespace which is `html`, unless specified otherwise.\n        implicitNamespacePrefix: 'svg',\n        // We want to prevent children of foreignObject from inheriting its namespace, because\n        // the point of the element is to allow nodes from other namespaces to be inserted.\n        preventNamespaceInheritance: true,\n      }),\n      'math': new HtmlTagDefinition({implicitNamespacePrefix: 'math'}),\n      'li': new HtmlTagDefinition({closedByChildren: ['li'], closedByParent: true}),\n      'dt': new HtmlTagDefinition({closedByChildren: ['dt', 'dd']}),\n      'dd': new HtmlTagDefinition({closedByChildren: ['dt', 'dd'], closedByParent: true}),\n      'rb': new HtmlTagDefinition(\n          {closedByChildren: ['rb', 'rt', 'rtc', 'rp'], closedByParent: true}),\n      'rt': new HtmlTagDefinition(\n          {closedByChildren: ['rb', 'rt', 'rtc', 'rp'], closedByParent: true}),\n      'rtc': new HtmlTagDefinition({closedByChildren: ['rb', 'rtc', 'rp'], closedByParent: true}),\n      'rp': new HtmlTagDefinition(\n          {closedByChildren: ['rb', 'rt', 'rtc', 'rp'], closedByParent: true}),\n      'optgroup': new HtmlTagDefinition({closedByChildren: ['optgroup'], closedByParent: true}),\n      'option':\n          new HtmlTagDefinition({closedByChildren: ['option', 'optgroup'], closedByParent: true}),\n      'pre': new HtmlTagDefinition({ignoreFirstLf: true}),\n      'listing': new HtmlTagDefinition({ignoreFirstLf: true}),\n      'style': new HtmlTagDefinition({contentType: TagContentType.RAW_TEXT}),\n      'script': new HtmlTagDefinition({contentType: TagContentType.RAW_TEXT}),\n      'title': new HtmlTagDefinition({\n        // The browser supports two separate `title` tags which have to use\n        // a different content type: `HTMLTitleElement` and `SVGTitleElement`\n        contentType: {default: TagContentType.ESCAPABLE_RAW_TEXT, svg: TagContentType.PARSABLE_DATA}\n      }),\n      'textarea': new HtmlTagDefinition(\n          {contentType: TagContentType.ESCAPABLE_RAW_TEXT, ignoreFirstLf: true}),\n    };\n  }\n  // We have to make both a case-sensitive and a case-insensitive lookup, because\n  // HTML tag names are case insensitive, whereas some SVG tags are case sensitive.\n  return TAG_DEFINITIONS[tagName] ?? TAG_DEFINITIONS[tagName.toLowerCase()] ??\n      _DEFAULT_TAG_DEFINITION;\n}\n"]}
\No newline at end of file