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perf(plugin-md-power): optimize plot rule (#408)

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pengzhanbo 2024-12-29 00:39:59 +08:00 committed by GitHub
parent 463bbd3fed
commit 5b85cc91a8
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1 changed files with 26 additions and 15 deletions
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41
plugins/plugin-md-power/src/node/inline/plot.ts
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@ -4,8 +4,6 @@
import type { PluginWithOptions } from 'markdown-it'
import type { RuleInline } from 'markdown-it/lib/parser_inline.mjs'
const [openTag, endTag] = ['!!', '!!']
export const plotPlugin: PluginWithOptions<never> = md =>
md.inline.ruler.before('emphasis', 'plot', createTokenizer())
@ -15,9 +13,21 @@ function createTokenizer(): RuleInline {
const max = state.posMax
const start = state.pos
if (state.src.slice(start, start + 2) !== openTag)
if (
state.src.charCodeAt(start) !== 0x21
|| state.src.charCodeAt(start + 1) !== 0x21
) {
return false
}
const next = state.src.charCodeAt(start + 2)
// - !! xxx | !!!xxx
// ^ | ^
if (next === 0x20 || next === 0x21)
return false
/* istanbul ignore if -- @preserve */
if (silent)
return false
@ -28,7 +38,8 @@ function createTokenizer(): RuleInline {
state.pos = start + 2
while (state.pos < max) {
if (state.src.slice(state.pos - 1, state.pos + 1) === endTag) {
if (state.src.charCodeAt(state.pos) === 0x21
&& state.src.charCodeAt(state.pos + 1) === 0x21) {
found = true
break
}
@ -36,31 +47,31 @@ function createTokenizer(): RuleInline {
state.md.inline.skipToken(state)
}
if (!found || start + 2 === state.pos) {
if (
!found
|| start + 2 === state.pos
// - !!xxx !!
// ^
|| state.src.charCodeAt(state.pos - 1) === 0x20
) {
state.pos = start
return false
}
const content = state.src.slice(start + 2, state.pos - 1)
// 不允许前后带有空格
if (/^\s|\s$/.test(content)) {
state.pos = start
return false
}
const content = state.src.slice(start + 2, state.pos)
// found!
state.posMax = state.pos - 1
state.posMax = state.pos
state.pos = start + 2
const open = state.push('plot_open', 'Plot', 1)
open.markup = openTag
open.markup = '!!'
const text = state.push('text', '', 0)
text.content = content
const close = state.push('plot_close', 'Plot', -1)
close.markup = endTag
close.markup = '!!'
state.pos = state.posMax + 2
state.posMax = max