mirror of https://github.com/Requarks/wiki.git
NGPixel
5 years ago
7 changed files with 248 additions and 128 deletions
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2package.json
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7server/modules/rendering/html-security/renderer.js
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2server/modules/rendering/markdown-core/renderer.js
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2server/modules/rendering/markdown-katex/definition.yml
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20server/modules/rendering/markdown-mathjax/definition.yml
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207server/modules/rendering/markdown-mathjax/renderer.js
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136yarn.lock
@ -0,0 +1,20 @@ |
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key: markdownMathjax |
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title: Mathjax |
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description: LaTeX Math + Chemical Expression Typesetting Renderer |
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author: requarks.io |
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icon: mdi-math-integral |
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enabledDefault: false |
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dependsOn: markdownCore |
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props: |
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useInline: |
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type: Boolean |
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default: true |
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title: Inline TeX |
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hint: Process inline TeX expressions surrounded by $ symbols. |
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order: 1 |
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useBlocks: |
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type: Boolean |
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default: true |
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title: TeX Blocks |
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hint: Process TeX blocks enclosed by $$ symbols. |
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order: 2 |
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@ -0,0 +1,207 @@ |
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const mjax = require('mathjax') |
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/* global WIKI */ |
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// ------------------------------------
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// Markdown - MathJax Renderer
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// ------------------------------------
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const extensions = [ |
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'bbox', |
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'boldsymbol', |
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'braket', |
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'color', |
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'extpfeil', |
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'mhchem', |
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'newcommand', |
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'unicode', |
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'verb' |
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] |
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module.exports = { |
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async init (mdinst, conf) { |
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const MathJax = await mjax.init({ |
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loader: { |
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require: require, |
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paths: { mathjax: 'mathjax/es5' }, |
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load: [ |
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'input/tex', |
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'output/svg', |
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...extensions.map(e => `[tex]/${e}`) |
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] |
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}, |
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tex: { |
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packages: {'[+]': extensions} |
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} |
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}) |
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if (conf.useInline) { |
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mdinst.inline.ruler.after('escape', 'mathjax_inline', mathjaxInline) |
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mdinst.renderer.rules.mathjax_inline = (tokens, idx) => { |
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try { |
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const result = MathJax.tex2svg(tokens[idx].content, { |
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display: false |
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}) |
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return MathJax.startup.adaptor.innerHTML(result) |
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} catch (err) { |
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WIKI.logger.warn(err) |
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return tokens[idx].content |
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} |
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} |
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} |
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if (conf.useBlocks) { |
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mdinst.block.ruler.after('blockquote', 'mathjax_block', mathjaxBlock, { |
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alt: [ 'paragraph', 'reference', 'blockquote', 'list' ] |
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}) |
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mdinst.renderer.rules.mathjax_block = (tokens, idx) => { |
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try { |
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const result = MathJax.tex2svg(tokens[idx].content, { |
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display: true |
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}) |
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return `<p>` + MathJax.startup.adaptor.innerHTML(result) + `</p>` |
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} catch (err) { |
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WIKI.logger.warn(err) |
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return tokens[idx].content |
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} |
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} |
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} |
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} |
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} |
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// Test if potential opening or closing delimieter
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// Assumes that there is a "$" at state.src[pos]
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function isValidDelim (state, pos) { |
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let prevChar |
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let nextChar |
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let max = state.posMax |
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let canOpen = true |
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let canClose = true |
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prevChar = pos > 0 ? state.src.charCodeAt(pos - 1) : -1 |
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nextChar = pos + 1 <= max ? state.src.charCodeAt(pos + 1) : -1 |
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// Check non-whitespace conditions for opening and closing, and
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// check that closing delimeter isn't followed by a number
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if (prevChar === 0x20/* " " */ || prevChar === 0x09/* \t */ || |
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(nextChar >= 0x30/* "0" */ && nextChar <= 0x39/* "9" */)) { |
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canClose = false |
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} |
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if (nextChar === 0x20/* " " */ || nextChar === 0x09/* \t */) { |
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canOpen = false |
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} |
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return { |
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canOpen: canOpen, |
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canClose: canClose |
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} |
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} |
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function mathjaxInline (state, silent) { |
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let start, match, token, res, pos |
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if (state.src[state.pos] !== '$') { return false } |
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res = isValidDelim(state, state.pos) |
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if (!res.canOpen) { |
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if (!silent) { state.pending += '$' } |
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state.pos += 1 |
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return true |
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} |
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// First check for and bypass all properly escaped delimieters
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// This loop will assume that the first leading backtick can not
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// be the first character in state.src, which is known since
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// we have found an opening delimieter already.
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start = state.pos + 1 |
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match = start |
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while ((match = state.src.indexOf('$', match)) !== -1) { |
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// Found potential $, look for escapes, pos will point to
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// first non escape when complete
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pos = match - 1 |
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while (state.src[pos] === '\\') { pos -= 1 } |
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// Even number of escapes, potential closing delimiter found
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if (((match - pos) % 2) === 1) { break } |
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match += 1 |
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} |
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// No closing delimter found. Consume $ and continue.
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if (match === -1) { |
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if (!silent) { state.pending += '$' } |
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state.pos = start |
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return true |
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} |
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// Check if we have empty content, ie: $$. Do not parse.
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if (match - start === 0) { |
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if (!silent) { state.pending += '$$' } |
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state.pos = start + 1 |
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return true |
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} |
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// Check for valid closing delimiter
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res = isValidDelim(state, match) |
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if (!res.canClose) { |
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if (!silent) { state.pending += '$' } |
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state.pos = start |
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return true |
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} |
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if (!silent) { |
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token = state.push('mathjax_inline', 'math', 0) |
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token.markup = '$' |
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token.content = state.src.slice(start, match) |
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} |
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state.pos = match + 1 |
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return true |
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} |
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function mathjaxBlock (state, start, end, silent) { |
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let firstLine; let lastLine; let next; let lastPos; let found = false; let token |
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let pos = state.bMarks[start] + state.tShift[start] |
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let max = state.eMarks[start] |
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if (pos + 2 > max) { return false } |
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if (state.src.slice(pos, pos + 2) !== '$$') { return false } |
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pos += 2 |
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firstLine = state.src.slice(pos, max) |
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if (silent) { return true } |
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if (firstLine.trim().slice(-2) === '$$') { |
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// Single line expression
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firstLine = firstLine.trim().slice(0, -2) |
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found = true |
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} |
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for (next = start; !found;) { |
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next++ |
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if (next >= end) { break } |
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pos = state.bMarks[next] + state.tShift[next] |
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max = state.eMarks[next] |
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if (pos < max && state.tShift[next] < state.blkIndent) { |
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// non-empty line with negative indent should stop the list:
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break |
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} |
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if (state.src.slice(pos, max).trim().slice(-2) === '$$') { |
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lastPos = state.src.slice(0, max).lastIndexOf('$$') |
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lastLine = state.src.slice(pos, lastPos) |
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found = true |
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} |
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} |
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state.line = next + 1 |
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token = state.push('mathjax_block', 'math', 0) |
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token.block = true |
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token.content = (firstLine && firstLine.trim() ? firstLine + '\n' : '') + |
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state.getLines(start + 1, next, state.tShift[start], true) + |
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(lastLine && lastLine.trim() ? lastLine : '') |
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token.map = [ start, state.line ] |
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token.markup = '$$' |
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return true |
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} |
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