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Copy Knossos parser changes to Omorphia #76

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Jun 28, 2023
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Copy Knossos parser changes to Omorphia #76

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19 changes: 12 additions & 7 deletions lib/helpers/parse.js
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Original file line number Diff line number Diff line change
Expand Up @@ -14,14 +14,17 @@ export const configuredXss = new xss.FilterXSS({
kbd: ['id'],
input: ['checked', 'disabled', 'type'],
iframe: ['width', 'height', 'allowfullscreen', 'frameborder', 'start', 'end'],
img: [...xss.whiteList.img, 'usemap'],
img: [...xss.whiteList.img, 'usemap', 'style'],
map: ['name'],
area: [...xss.whiteList.a, 'coords'],
a: [...xss.whiteList.a, 'rel'],
td: [...xss.whiteList.td, 'style'],
th: [...xss.whiteList.th, 'style'],
},
css: {
whiteList: {
'image-rendering': /^pixelated$/,
'text-align': /^center|left|right$/,
},
},
onIgnoreTagAttr: (tag, name, value) => {
Expand Down Expand Up @@ -50,12 +53,14 @@ export const configuredXss = new xss.FilterXSS({
}

// For Highlight.JS
if (
name === 'class' &&
['pre', 'code', 'span'].includes(tag) &&
(value.startsWith('hljs-') || value.startsWith('language-'))
) {
return name + '="' + xss.escapeAttrValue(value) + '"'
if (name === 'class' && ['pre', 'code', 'span'].includes(tag)) {
const allowedClasses = []
for (const className of value.split(/\s/g)) {
if (className.startsWith('hljs-') || className.startsWith('language-')) {
allowedClasses.push(className)
}
}
return name + '="' + xss.escapeAttrValue(allowedClasses.join(' ')) + '"'
}
},
safeAttrValue(tag, name, value, cssFilter) {
Expand Down