Skip to content

Instantly share code, notes, and snippets.

@yuntan yuntan/sb2md.sbext.js
Last active Aug 9, 2019

Embed
What would you like to do?
Scrapbox -> Markdown (Scrapbox extension)
scrapbox.PopupMenu.addButton({
title: 'Copy markdown',
onClick: sb2md,
});
scrapbox.PageMenu.addItem({
title: 'Copy this page as markdown',
onClick: () => {
const text = scrapbox.Page.lines.map(l => l.text).join('\n');
copyText(sb2md(text));
},
});
function sb2md(text) {
// code block
const escapeCodeBlocks = s => s.replace(
/^code:(.+)$((\n^[ \t].*$)+)/mg,
(_, p1, p2) =>
'```' + p1 + p2.replace(/^[ \t]/mg, '').replace(/\r|\n|\r\n/g, '+++') + '+++```'
);
const unescapeCodeBlocks = s => s.replace(/\+{3}/g, '\n');
const replaceLine = line =>
/^`{3}/.test(line) ? line :
// level 2 heading
line.replace(/^\[\[([^\[\]]+)\]\]$/, '## $1')
.replace(/^\[\*\s+(\S[^\[\]]*)\]$/, '## $1')
// anchor link
.replace(/\[(https?:\/\/[^ \[\]]+) +([^\[\]]+)\]/g, '[$2]($1)')
.replace(/\[ *(((?!http)[^ \[\]]+ +)*(?!http)[^ \[\]]+) +(https?:\/\/[^ \[\]]+)\]/g, '[$1]($3)')
// image block
.replace(/^\[(https?:\/\/\S+\.(png|gif|jpe?g))\]$/, '![]($1)')
.replace(/^\[(https:\/\/gyazo.com\/\S+)\]$/, '![]($1.png)')
// unordered list
.replace(/^\s(\S.*)$/, '- $1')
.replace(/^\s{2}(\S.*)$/, ' - $1')
.replace(/^\s{3}(\S.*)$/, ' - $1')
// bold text
.replace(/\[\[([^\[\]]+)\]\]/g, '**$1**')
.replace(/\[\*\s+([^\[\]]+)\]/g, '**$1**')
// italic text
.replace(/\[\/\s+([^\[\]]+)\]/g, '*$1*')
// strike text
.replace(/\[- +([^\[\]]+)\]/g, '~~$1~~');
// return text
// .then(escapeCodeBlocks)
// .split(/\r|\n|\r\n/)
// // first line is level 1 heading
// .then(lines => [lines[0].replace(/^(.+)$/, '# $1')].concat(lines.slice(1)))
// .map(replaceLine)
// .join('\n')
// .then(unescapeCodeBlocks);
text = escapeCodeBlocks(text)
.split(/\r|\n|\r\n/);
// first line is level 1 heading
text = (lines => [lines[0].replace(/^(.+)$/, '# $1')].concat(lines.slice(1)))(text)
.map(replaceLine)
.join('\n');
return unescapeCodeBlocks(text);
}
function copyText(text) {
const pre = document.createElement('pre');
pre.innerText = text;
document.body.appendChild(pre);
document.getSelection().selectAllChildren(pre);
document.execCommand('copy');
document.body.removeChild(pre);
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.