src/subParsers/makehtml/detab.js
/**
* Convert all tabs to spaces
*/
showdown.subParser('makehtml.detab', function (text, options, globals) {
'use strict';
text = globals.converter._dispatch('makehtml.detab.before', text, options, globals).getText();
// expand first n-1 tabs
text = text.replace(/\t(?=\t)/g, ' '); // g_tab_width
// replace the nth with two sentinels
text = text.replace(/\t/g, '¨A¨B');
// use the sentinel to anchor our regex so it doesn't explode
text = text.replace(/¨B(.+?)¨A/g, function (wholeMatch, m1) {
var leadingText = m1,
numSpaces = 4 - leadingText.length % 4; // g_tab_width
// there *must* be a better way to do this:
for (var i = 0; i < numSpaces; i++) {
leadingText += ' ';
}
return leadingText;
});
// clean up sentinels
text = text.replace(/¨A/g, ' '); // g_tab_width
text = text.replace(/¨B/g, '');
text = globals.converter._dispatch('makehtml.detab.after', text, options, globals).getText();
return text;
});