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Showdown: parse single underscores as italics

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This commit is contained in:
Cohee 2024-03-03 15:26:25 +02:00
parent be38359d66
commit 39c588f30e
2 changed files with 24 additions and 0 deletions
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2
public/script.js
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@ -172,6 +172,7 @@ import {
} from './scripts/secrets.js'; } from './scripts/secrets.js';
import { EventEmitter } from './lib/eventemitter.js'; import { EventEmitter } from './lib/eventemitter.js';
import { markdownExclusionExt } from './scripts/showdown-exclusion.js'; import { markdownExclusionExt } from './scripts/showdown-exclusion.js';
import { markdownUnderscoreExt } from './scripts/showdown-underscore.js';
import { NOTE_MODULE_NAME, initAuthorsNote, metadata_keys, setFloatingPrompt, shouldWIAddPrompt } from './scripts/authors-note.js'; import { NOTE_MODULE_NAME, initAuthorsNote, metadata_keys, setFloatingPrompt, shouldWIAddPrompt } from './scripts/authors-note.js';
import { registerPromptManagerMigration } from './scripts/PromptManager.js'; import { registerPromptManagerMigration } from './scripts/PromptManager.js';
import { getRegexedString, regex_placement } from './scripts/extensions/regex/engine.js'; import { getRegexedString, regex_placement } from './scripts/extensions/regex/engine.js';
@ -690,6 +691,7 @@ function reloadMarkdownProcessor(render_formulas = false) {
parseImgDimensions: true, parseImgDimensions: true,
tables: true, tables: true,
underline: true, underline: true,
extensions: [markdownUnderscoreExt()],
}); });
} }

22
public/scripts/showdown-underscore.js Normal file
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@ -0,0 +1,22 @@
// Showdown extension that replaces words surrounded by singular underscores with <em> tags
export const markdownUnderscoreExt = () => {
if (!canUseNegativeLookbehind()) {
console.log('Showdown-underscore extension: Negative lookbehind not supported. Skipping.');
return [];
}
return [{
type: 'lang',
regex: /\b(?<!_)_(?!_)(.*?)(?<!_)_(?!_)\b/g,
replace: '<em>$1</em>',
}];
};
function canUseNegativeLookbehind() {
try {
new RegExp('(?<!_)');
return true;
} catch (e) {
return false;
}
}