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Align line numbers with firstLineNumber attribute. #12

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Align line numbers with firstLineNumber attribute. #12

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If affected element has `firstLineNumber` attribute will use it to sh…
iarkhanhelsky Oct 27, 2016
114d981
Converted spaces to tabs
iarkhanhelsky Oct 27, 2016
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10 changes: 8 additions & 2 deletions src/highlightjs-line-numbers.js
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Original file line number Diff line number Diff line change
Expand Up @@ -34,12 +34,18 @@
if (typeof element !== 'object') return;

var parent = element.parentNode;
// if have 'firstLineNumber' attribute and it's a positive nubmer
// start line numbering from its value.
var startFrom = element.getAttribute('firstLineNumber');
// if startFrom is 'null' regex test will return 'false'
startFrom = (/^\d+$/.test(startFrom)) ? parseInt(startFrom) : 0;
var lines = getCountLines(parent.textContent);

if (lines > 1) {
var l = '';
for (var i = 0; i < lines; i++) {
l += (i + 1) + '\n';
// shifting line number as it was numbered starting from 'startFrom'
l += (startFrom + i + 1) + '\n';
}

var linesPanel = document.createElement('code');
Expand All @@ -64,4 +70,4 @@

return lines;
}
}(window));
}(window));