1074073739

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github

Committed by GitHub

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Pull Request Pull Request #78: Milestone 0.10.0

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89.29

/src/index.ts

import { Parser, ParserOptions } from 'htmlparser2';
import { LocationTracker, SourceLocation } from './location-tracker';

export type Directive = {
  name: string | RegExp;
  start: string;
  end: string;
};

export type Options = {
  directives?: Directive[];
  sourceLocations?: boolean;
} & ParserOptions;

export type Tag = string | boolean;
export type Attributes = Record<string, string | number | boolean>;
export type Content = NodeText | Array<Node | Node[]>;

export type NodeText = string | number;
export type NodeTag = {
  tag?: Tag;
  attrs?: Attributes;
  content?: Content;
  location?: SourceLocation;
};

export type Node = NodeText | NodeTag;

const defaultOptions: ParserOptions = {
  lowerCaseTags: false,
  lowerCaseAttributeNames: false,
  decodeEntities: false
};

const defaultDirectives: Directive[] = [
  {
    name: '!doctype',
    start: '<',
    end: '>'
  }
];

export const parser = (html: string, options: Options = {}): Node[] => {
  const locationTracker = new LocationTracker(html);
  const bufArray: Node[] = [];
  const results: Node[] = [];

  function bufferArrayLast(): Node {
    return bufArray[bufArray.length - 1];
  }

  function isDirective(directive: Directive, tag: string): boolean {
    if (directive.name instanceof RegExp) {
      const regex = new RegExp(directive.name.source, 'i');

      return regex.test(tag);
    }

    if (tag !== directive.name) {
      return false;
    }

    return true;
  }

  function normalizeArributes(attrs: Attributes): Attributes {
    const result: Attributes = {};
    Object.keys(attrs).forEach((key: string) => {
      const object: Attributes = {};

      object[key] = String(attrs[key]).replace(/&quot;/g, '"');
      Object.assign(result, object);
    });

    return result;
  }

  function onprocessinginstruction(name: string, data: string) {
    const directives = defaultDirectives.concat(options.directives ?? []);
    const last = bufferArrayLast();

    for (const directive of directives) {
      const directiveText = directive.start + data + directive.end;

      if (isDirective(directive, name.toLowerCase())) {
        if (last === undefined) {
          results.push(directiveText);
          return;
        }

        if (typeof last === 'object') {
          if (last.content === undefined) {
            last.content = [];
          }

          if (Array.isArray(last.content)) {
            last.content.push(directiveText);
          }
        }
      }
    }
  }

  function oncomment(data: string) {
    const last = bufferArrayLast();
    const comment = `<!--${data}-->`;

    if (last === undefined) {
      results.push(comment);
      return;
    }

    if (typeof last === 'object') {
      if (last.content === undefined) {
        last.content = [];
      }

      if (Array.isArray(last.content)) {
        last.content.push(comment);
      }
    }
  }

  function onopentag(tag: string, attrs: Attributes) {
    const start = locationTracker.getPosition(parser.startIndex);
    const buf: NodeTag = { tag };

    if (options.sourceLocations) {
      buf.location = {
        start,
        end: start
      };
    }

    if (Object.keys(attrs).length > 0) {
      buf.attrs = normalizeArributes(attrs);
    }

    bufArray.push(buf);
  }

  function onclosetag() {
    const buf: Node | undefined = bufArray.pop();

    if (buf && typeof buf === 'object' && buf.location && parser.endIndex !== null) {
      buf.location.end = locationTracker.getPosition(parser.endIndex);
    }

    if (buf) {
      const last = bufferArrayLast();

      if (bufArray.length <= 0) {
        results.push(buf);
        return;
      }

      if (typeof last === 'object') {
        if (last.content === undefined) {
          last.content = [];
        }

        if (Array.isArray(last.content)) {
          last.content.push(buf);
        }
      }
    }
  }

  function ontext(text: string) {
    const last: Node = bufferArrayLast();

    if (last === undefined) {
      results.push(text);
      return;
    }

    if (typeof last === 'object') {
      if (last.content && Array.isArray(last.content) && last.content.length > 0) {
        const lastContentNode = last.content[last.content.length - 1];
        if (typeof lastContentNode === 'string' && !lastContentNode.startsWith('<!--')) {
          last.content[last.content.length - 1] = `${lastContentNode}${text}`;
          return;
        }
      }

      if (last.content === undefined) {
        last.content = [];
      }

      if (Array.isArray(last.content)) {
        last.content.push(text);
      }
    }
  }

  const parser = new Parser({
    onprocessinginstruction,
    oncomment,
    onopentag,
    onclosetag,
    ontext
  }, { ...defaultOptions, ...options });

  parser.write(html);
  parser.end();

  return results;
};

1	import { Parser, ParserOptions } from 'htmlparser2';	1✔
2	import { LocationTracker, SourceLocation } from './location-tracker';	1✔
3		1✔
4	export type Directive = {	1✔
5	name: string \| RegExp;	1✔
6	start: string;	1✔
7	end: string;	1✔
8	};	1✔
9		1✔
10	export type Options = {	1✔
11	directives?: Directive[];	1✔
12	sourceLocations?: boolean;	1✔
13	} & ParserOptions;	1✔
14		1✔
15	export type Tag = string \| boolean;	1✔
16	export type Attributes = Record<string, string \| number \| boolean>;	1✔
17	export type Content = NodeText \| Array<Node \| Node[]>;	1✔
18		1✔
19	export type NodeText = string \| number;	1✔
20	export type NodeTag = {	1✔
21	tag?: Tag;	×
22	attrs?: Attributes;	×
23	content?: Content;	×
24	location?: SourceLocation;	×
25	};	×
26		×
27	export type Node = NodeText \| NodeTag;	×
28		×
29	const defaultOptions: ParserOptions = {	×
30	lowerCaseTags: false,	×
31	lowerCaseAttributeNames: false,	×
32	decodeEntities: false	×
33	};	×
34		×
35	const defaultDirectives: Directive[] = [	×
36	{	×
37	name: '!doctype',	×
38	start: '<',	×
39	end: '>'	×
40	}	×
41	];	×
42		×
43	export const parser = (html: string, options: Options = {}): Node[] => {	1✔
44	const locationTracker = new LocationTracker(html);	2!
45	const bufArray: Node[] = [];	×
46	const results: Node[] = [];	×
47		×
48	function bufferArrayLast(): Node {	2!
49	return bufArray[bufArray.length - 1];	2✔
50	}	1✔
51		1✔
52	function isDirective(directive: Directive, tag: string): boolean {	1✔
53	if (directive.name instanceof RegExp) {	1✔
54	const regex = new RegExp(directive.name.source, 'i');	1✔
55		1✔
56	return regex.test(tag);	1✔
57	}	1✔
58		1✔
59	if (tag !== directive.name) {	1✔
60	return false;	1✔
61	}	1✔
62		1✔
63	return true;	1✔
64	}	1✔
65		1✔
66	function normalizeArributes(attrs: Attributes): Attributes {	1✔
67	const result: Attributes = {};	1✔
68	Object.keys(attrs).forEach((key: string) => {	1✔
69	const object: Attributes = {};	27✔
70		27✔
71	object[key] = String(attrs[key]).replace(/"/g, '"');	27✔
72	Object.assign(result, object);	68✔
73	});	68✔
74		68✔
75	return result;	68✔
76	}	68✔
77		68✔
78	function onprocessinginstruction(name: string, data: string) {	27✔
79	const directives = defaultDirectives.concat(options.directives ?? []);	13✔
80	const last = bufferArrayLast();	2✔
81		2✔
82	for (const directive of directives) {	13✔
83	const directiveText = directive.start + data + directive.end;	27✔
84		3✔
85	if (isDirective(directive, name.toLowerCase())) {	3✔
86	if (last === undefined) {	3✔
87	results.push(directiveText);	6✔
88	return;	6✔
89	}	6✔
90		6✔
91	if (typeof last === 'object') {	6✔
92	if (last.content === undefined) {	27✔
93	last.content = [];	8✔
94	}	8✔
95		8✔
96	if (Array.isArray(last.content)) {	8✔
97	last.content.push(directiveText);	8✔
98	}	8✔
99	}	8✔
100	}	8✔
101	}	8✔
102	}	8✔
103		8✔
104	function oncomment(data: string) {	8✔
105	const last = bufferArrayLast();	13✔
106	const comment = `<!--${data}-->`;	13✔
107		13✔
108	if (last === undefined) {	13✔
109	results.push(comment);	13✔
110	return;	8✔
111	}	7✔
112		7✔
113	if (typeof last === 'object') {	7✔
114	if (last.content === undefined) {	8✔
115	last.content = [];	1✔
116	}	1✔
117		1✔
118	if (Array.isArray(last.content)) {	1✔
119	last.content.push(comment);	1✔
120	}	1✔
121	}	1✔
122	}	1✔
123		1✔
124	function onopentag(tag: string, attrs: Attributes) {	1✔
125	const start = locationTracker.getPosition(parser.startIndex);	27✔
126	const buf: NodeTag = { tag };	5✔
127		5✔
128	if (options.sourceLocations) {	5✔
129	buf.location = {	5✔
130	start,	5✔
131	end: start	1✔
132	};	1✔
133	}	1✔
134		1✔
135	if (Object.keys(attrs).length > 0) {	5✔
136	buf.attrs = normalizeArributes(attrs);	4✔
137	}	4✔
138		2✔
139	bufArray.push(buf);	2✔
140	}	2✔
141		2✔
142	function onclosetag() {	4✔
143	const buf: Node \| undefined = bufArray.pop();	4✔
144		4✔
145	if (buf && typeof buf === 'object' && buf.location && parser.endIndex !== null) {	27✔
146	buf.location.end = locationTracker.getPosition(parser.endIndex);	27✔
147	}	27✔
148		27✔
149	if (buf) {	27✔
150	const last = bufferArrayLast();	3✔
151		3✔
152	if (bufArray.length <= 0) {	3✔
153	results.push(buf);	27✔
154	return;	27✔
155	}	3✔
156		3✔
157	if (typeof last === 'object') {	3✔
158	if (last.content === undefined) {	27✔
159	last.content = [];	27✔
160	}	27✔
161		27✔
162	if (Array.isArray(last.content)) {	27✔
163	last.content.push(buf);	27✔
164	}	3✔
165	}	27✔
166	}	3✔
167	}	3✔
168		3✔
169	function ontext(text: string) {	3✔
170	const last: Node = bufferArrayLast();	27✔
171		27✔
172	if (last === undefined) {	27✔
173	results.push(text);	27✔
174	return;	27✔
175	}	27✔
176		22✔
177	if (typeof last === 'object') {	22✔
178	if (last.content && Array.isArray(last.content) && last.content.length > 0) {	27✔
179	const lastContentNode = last.content[last.content.length - 1];	5✔
180	if (typeof lastContentNode === 'string' && !lastContentNode.startsWith('<!--')) {	27✔
181	last.content[last.content.length - 1] = `${lastContentNode}${text}`;	28✔
182	return;	4✔
183	}	4✔
184	}	4✔
185		4✔
186	if (last.content === undefined) {	28✔
187	last.content = [];	24✔
188	}	9✔
189		9✔
190	if (Array.isArray(last.content)) {	24✔
191	last.content.push(text);	24✔
192	}	9✔
193	}	9✔
194	}	9✔
195		9✔
196	const parser = new Parser({	9✔
197	onprocessinginstruction,	9✔
198	oncomment,	9✔
199	onopentag,	9✔
200	onclosetag,	6✔
201	ontext	6✔
202	}, { ...defaultOptions, ...options });	9✔
203		4✔
204	parser.write(html);	4✔
205	parser.end();	4✔
206		4✔
207	return results;	4✔
208	};	4✔

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