Added plugin

Author: wcoder

src/highlightjs-line-numbers.js

@@ -0,0 +1,48 @@
+(function (w) {
+	'use strict';
+
+	if (typeof w.hljs == undefined) {
+		console.error('highlight.js not detected!');
+	} else {
+		w.hljs.initLineNumbersOnLoad = initLineNumbersOnLoad;
+		w.hljs.lineNumbersBlock = lineNumbersBlock;
+	}
+
+
+	function initLineNumbersOnLoad () {
+		w.addEventListener('load', function () {
+			try {
+				var blocks = document.getElementsByClassName('hljs');
+
+				for (var i in blocks) {
+					if (blocks.hasOwnProperty(i)) {
+						lineNumbersBlock(blocks[i]);
+					}
+				}
+			} catch (e) {
+				console.error('LineNumbers error: ', e);
+			}
+		});
+	}
+
+	function lineNumbersBlock (element) {
+		if (typeof element !== 'object') return;
+
+		var parent = element.parentNode;
+		var lines = parent.outerText.match(/\n/g);
+
+		lines = lines ? lines.length : 0;
+		if (lines > 1) {
+			var l = '';
+			for (var i = 0; i < lines; i++) {
+				l += (i+1) + '\n';
+			}
+
+			var linesPanel = document.createElement('code');
+			linesPanel.className = 'hljs-line-numbers';
+			linesPanel.innerText = l;
+
+			parent.insertBefore(linesPanel, element);
+		}
+	}
+}(window));