1 files changed, 40 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/utils/indentation.js b/devtools/client/debugger/src/utils/indentation.js
new file mode 100644
index 0000000000..80e5014f6d
--- /dev/null
+++ b/devtools/client/debugger/src/utils/indentation.js
@@ -0,0 +1,40 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+export function getIndentation(line) {
+  if (!line) {
+    return 0;
+  }
+
+  const lineMatch = line.match(/^\s*/);
+  if (!lineMatch) {
+    return 0;
+  }
+
+  return lineMatch[0].length;
+}
+
+function getMaxIndentation(lines) {
+  const firstLine = lines[0];
+  const secondLine = lines[1];
+  const lastLine = lines[lines.length - 1];
+
+  const indentations = [
+    getIndentation(firstLine),
+    getIndentation(secondLine),
+    getIndentation(lastLine),
+  ];
+
+  return Math.max(...indentations);
+}
+
+export function correctIndentation(text) {
+  const lines = text.trim().split("\n");
+  const indentation = getMaxIndentation(lines);
+  const formattedLines = lines.map(_line =>
+    _line.replace(new RegExp(`^\\s{0,${indentation - 1}}`), "")
+  );
+
+  return formattedLines.join("\n");
+}