1 files changed, 44 insertions, 0 deletions
diff --git a/devtools/server/actors/utils/source-url.js b/devtools/server/actors/utils/source-url.js
new file mode 100644
index 0000000000..be80025e46
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+++ b/devtools/server/actors/utils/source-url.js
@@ -0,0 +1,44 @@
+/* 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/. */
+
+"use strict";
+
+/**
+ * Debugger.Source objects have a `url` property that exposes the value
+ * that was passed to SpiderMonkey, but unfortunately often SpiderMonkey
+ * sets a URL even in cases where it doesn't make sense, so we have to
+ * explicitly ignore the URL value in these contexts to keep things a bit
+ * more consistent.
+ *
+ * @param {Debugger.Source} source
+ *
+ * @return {string | null}
+ */
+function getDebuggerSourceURL(source) {
+  const introType = source.introductionType;
+
+  // These are all the sources that are eval or eval-like, but may still have
+  // a URL set on the source, so we explicitly ignore the source URL for these.
+  if (
+    introType === "injectedScript" ||
+    introType === "eval" ||
+    introType === "debugger eval" ||
+    introType === "Function" ||
+    introType === "javascriptURL" ||
+    introType === "eventHandler" ||
+    introType === "domTimer"
+  ) {
+    return null;
+  }
+  // When using <iframe srcdoc="<script> js source </script>"/>, we can't easily fetch the srcdoc
+  // full html text content. So, consider each inline script as independant source with
+  // their own URL. Thus the ID appended to each URL.
+  if (source.url == "about:srcdoc") {
+    return source.url + "#" + source.id;
+  }
+
+  return source.url;
+}
+
+exports.getDebuggerSourceURL = getDebuggerSourceURL;