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-rw-r--r--devtools/shared/protocol/utils.js44
1 files changed, 44 insertions, 0 deletions
diff --git a/devtools/shared/protocol/utils.js b/devtools/shared/protocol/utils.js
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+++ b/devtools/shared/protocol/utils.js
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+/* 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";
+
+/**
+ * Find Placeholders in the template and save them along with their
+ * paths.
+ */
+function findPlaceholders(template, constructor, path = [], placeholders = []) {
+ if (!template || typeof template != "object") {
+ return placeholders;
+ }
+
+ if (template instanceof constructor) {
+ placeholders.push({ placeholder: template, path: [...path] });
+ return placeholders;
+ }
+
+ for (const name in template) {
+ path.push(name);
+ findPlaceholders(template[name], constructor, path, placeholders);
+ path.pop();
+ }
+
+ return placeholders;
+}
+
+exports.findPlaceholders = findPlaceholders;
+
+/**
+ * Get the value at a given path, or undefined if not found.
+ */
+function getPath(obj, path) {
+ for (const name of path) {
+ if (!(name in obj)) {
+ return undefined;
+ }
+ obj = obj[name];
+ }
+ return obj;
+}
+exports.getPath = getPath;