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add support for \(\) and \[\] syntax

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This commit is contained in:
dousha 2023-11-08 00:02:45 +08:00
parent 07537a14ae
commit fc47e22af7
1 changed files with 64 additions and 3 deletions
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67
src/services/import/tex.js
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@ -1,11 +1,15 @@
const inlineRule = /^(\${1,2})(?!\$)((?:\\.|[^\\\n])*?(?:\\.|[^\\\n$]))\1(?=[\s?!.,:？！。，：]|$)/;
const blockRule = /^(\${1,2})\n((?:\\[^]|[^\\])+?)\n\1(?:\n|$)/;
const alternativeInlineRule = /^\\\((?!\$)((?:\\.|[^\\\n])*?(?:\\.|[^\\\n$]))\\\)(?=[\s?!.,:？！。，：]|$)/;
const blockRule = /^(\${1,2})[\s\n]((?:\\[^]|[^\\])+?)[\s\n]\1(?:\n|$)/;
const alternativeBlockRule = /^\\\[(\s*)((?:\\[^]|[^\\])+?)(\s*)\\](?:\n|$)/;
function texPlugin(options = {}) {
return {
extensions: [
inlineKatex(options, createRenderer(options, false)),
blockKatex(options, createRenderer(options, true))
altInlineKatex(options, createRenderer(options, false)),
blockKatex(options, createRenderer(options, true)),
altBlockKatex(options, createRenderer(options, true))
]
};
}
@ -69,6 +73,46 @@ function inlineKatex(options, renderer) {
};
}
function altInlineKatex(options, renderer) {
return {
name: 'altInlineKatex',
level: 'inline',
start(src) {
let index;
let indexSrc = src;
while (indexSrc) {
index = indexSrc.indexOf('\\(');
if (index === -1) {
return;
}
if (index === 0 || indexSrc.charAt(index - 1) === ' ') {
const possibleKatex = indexSrc.substring(index + 1);
if (possibleKatex.match(alternativeInlineRule)) {
return index;
}
}
indexSrc = indexSrc.substring(index + 2).replace(/^\\[()]/, '');
}
},
tokenizer(src) {
const match = src.match(alternativeInlineRule);
if (match) {
return {
type: 'inlineKatex',
raw: match[0],
text: match[1].trim(),
displayMode: false
};
}
},
renderer
};
}
function blockKatex(options, renderer) {
return {
name: 'blockKatex',
@ -88,8 +132,25 @@ function blockKatex(options, renderer) {
};
}
function altBlockKatex(options, renderer) {
return {
name: 'altBlockKatex',
level: 'block',
tokenizer(src) {
const match = src.match(alternativeBlockRule);
if (match) {
return {
type: 'blockKatex',
raw: match[0],
text: match[2].trim(),
displayMode: true
};
}
},
renderer
};
}
module.exports = {
texPlugin
};