1 files changed, 75 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/utils/build-query.js b/devtools/client/debugger/src/utils/build-query.js
new file mode 100644
index 0000000000..9ad4789602
--- /dev/null
+++ b/devtools/client/debugger/src/utils/build-query.js
@@ -0,0 +1,75 @@
+/* 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/>. */
+
+// @flow
+import escapeRegExp from "lodash/escapeRegExp";
+
+import type { SearchModifiers } from "../types";
+
+type QueryOptions = {
+  isGlobal?: boolean,
+  ignoreSpaces?: boolean,
+};
+
+/**
+ * Ignore doing outline matches for less than 3 whitespaces
+ *
+ * @memberof utils/source-search
+ * @static
+ */
+function ignoreWhiteSpace(str: string): string {
+  return /^\s{0,2}$/.test(str) ? "(?!\\s*.*)" : str;
+}
+
+function wholeMatch(query: string, wholeWord: boolean): string {
+  if (query === "" || !wholeWord) {
+    return query;
+  }
+
+  return `\\b${query}\\b`;
+}
+
+function buildFlags(caseSensitive: boolean, isGlobal: boolean): ?RegExp$flags {
+  if (caseSensitive && isGlobal) {
+    return "g";
+  }
+
+  if (!caseSensitive && isGlobal) {
+    return "gi";
+  }
+
+  if (!caseSensitive && !isGlobal) {
+    return "i";
+  }
+}
+
+export default function buildQuery(
+  originalQuery: string,
+  modifiers: SearchModifiers,
+  { isGlobal = false, ignoreSpaces = false }: QueryOptions
+): RegExp {
+  const { caseSensitive, regexMatch, wholeWord } = modifiers;
+
+  if (originalQuery === "") {
+    return new RegExp(originalQuery);
+  }
+
+  let query = originalQuery;
+  if (ignoreSpaces) {
+    query = ignoreWhiteSpace(query);
+  }
+
+  if (!regexMatch) {
+    query = escapeRegExp(query);
+  }
+
+  query = wholeMatch(query, wholeWord);
+  const flags = buildFlags(caseSensitive, isGlobal);
+
+  if (flags) {
+    return new RegExp(query, flags);
+  }
+
+  return new RegExp(query);
+}