Merge pull request #55 from yaodingyd/master

feat: add function to process innerHTML instead and return value (#37)

Author: yauhenipakala

src/highlightjs-line-numbers.js

@@ -14,6 +14,7 @@
     if (w.hljs) {
         w.hljs.initLineNumbersOnLoad = initLineNumbersOnLoad;
         w.hljs.lineNumbersBlock = lineNumbersBlock;
+        w.hljs.lineNumbersValue = lineNumbersValue;
 
         addStyles();
     } else {
@@ -78,6 +79,25 @@
         });
     }
 
+    function lineNumbersValue (value, options) {
+        if (typeof value !== 'string') return;
+
+        // define options or set default
+        options = options || {
+            singleLine: false
+        };
+
+        var element = document.createElement('code')
+        element.innerHTML = value
+
+        // convert options
+        var firstLineIndex = !!options.singleLine ? 0 : 1;
+
+        duplicateMultilineNodes(element);
+
+        return addLineNumbersBlockFor(element.innerHTML, firstLineIndex);
+    }
+
     function addLineNumbersBlockFor (inputHtml, firstLineIndex) {
 
         var lines = getLines(inputHtml);