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website/functions/node_modules/power-assert-renderer-comparison/lib/udiff.js

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+'use strict';
+
+var DiffMatchPatch = require('diff-match-patch');
+var dmp = new DiffMatchPatch();
+
+function udiff (config) {
+    return function diff (text1, text2) {
+        var patch;
+        if (config && shouldUseLineLevelDiff(text1, config)) {
+            patch = udiffLines(text1, text2);
+        } else {
+            patch = udiffChars(text1, text2);
+        }
+        return decodeURIComponent(patch);
+    };
+}
+
+function shouldUseLineLevelDiff (text, config) {
+    return config.lineDiffThreshold < text.split(/\r\n|\r|\n/).length;
+}
+
+function udiffLines(text1, text2) {
+    /*jshint camelcase: false */
+    var a = dmp.diff_linesToChars_(text1, text2);
+    var diffs = dmp.diff_main(a.chars1, a.chars2, false);
+    dmp.diff_charsToLines_(diffs, a.lineArray);
+    dmp.diff_cleanupSemantic(diffs);
+    return dmp.patch_toText(dmp.patch_make(text1, diffs));
+}
+
+function udiffChars (text1, text2) {
+    /*jshint camelcase: false */
+    var diffs = dmp.diff_main(text1, text2, false);
+    dmp.diff_cleanupSemantic(diffs);
+    return dmp.patch_toText(dmp.patch_make(text1, diffs));
+}
+
+module.exports = udiff;