102 lines
1.8 KiB
Plaintext
102 lines
1.8 KiB
Plaintext
/**
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* @import {
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* Code,
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* Construct,
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* State,
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* TokenizeContext,
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* Tokenizer
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* } from 'micromark-util-types'
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*/
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import { factorySpace } from 'micromark-factory-space';
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import { markdownLineEnding, markdownSpace } from 'micromark-util-character';
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/** @type {Construct} */
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export const thematicBreak = {
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name: 'thematicBreak',
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tokenize: tokenizeThematicBreak
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};
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/**
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* @this {TokenizeContext}
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* Context.
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* @type {Tokenizer}
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*/
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function tokenizeThematicBreak(effects, ok, nok) {
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let size = 0;
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/** @type {NonNullable<Code>} */
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let marker;
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return start;
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/**
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* Start of thematic break.
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*
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* ```markdown
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* > | ***
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* ^
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* ```
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*
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* @type {State}
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*/
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function start(code) {
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effects.enter("thematicBreak");
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// To do: parse indent like `markdown-rs`.
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return before(code);
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}
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/**
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* After optional whitespace, at marker.
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*
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* ```markdown
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* > | ***
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* ^
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* ```
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*
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* @type {State}
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*/
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function before(code) {
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marker = code;
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return atBreak(code);
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}
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/**
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* After something, before something else.
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*
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* ```markdown
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* > | ***
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* ^
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* ```
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*
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* @type {State}
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*/
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function atBreak(code) {
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if (code === marker) {
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effects.enter("thematicBreakSequence");
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return sequence(code);
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}
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if (size >= 3 && (code === null || markdownLineEnding(code))) {
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effects.exit("thematicBreak");
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return ok(code);
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}
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return nok(code);
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}
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/**
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* In sequence.
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*
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* ```markdown
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* > | ***
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* ^
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* ```
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*
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* @type {State}
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*/
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function sequence(code) {
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if (code === marker) {
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effects.consume(code);
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size++;
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return sequence;
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}
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effects.exit("thematicBreakSequence");
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return markdownSpace(code) ? factorySpace(effects, atBreak, "whitespace")(code) : atBreak(code);
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}
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} |