1 files changed, 90 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/src/utils/headers-provider.js b/devtools/client/netmonitor/src/utils/headers-provider.js
new file mode 100644
index 0000000000..a76e7d1c0e
--- /dev/null
+++ b/devtools/client/netmonitor/src/utils/headers-provider.js
@@ -0,0 +1,90 @@
+/* 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";
+
+const {
+  ObjectProvider,
+} = require("resource://devtools/client/shared/components/tree/ObjectProvider.js");
+
+/**
+ * Custom tree provider.
+ *
+ * This provider is used to provide set of headers and is
+ * utilized by the HeadersPanel.
+ * The default ObjectProvider can't be used since it doesn't
+ * allow duplicities by design and so it can't support duplicity
+ * headers (more headers with the same name).
+ */
+var HeadersProvider = {
+  ...ObjectProvider,
+
+  getChildren(object) {
+    if (object && object.value instanceof HeaderList) {
+      return object.value.headers.map(
+        (header, index) => new Header(header.name, header.value, index)
+      );
+    }
+    return ObjectProvider.getChildren(object);
+  },
+
+  hasChildren(object) {
+    if (object.value instanceof HeaderList) {
+      return !!object.value.headers.length;
+    } else if (object instanceof Header) {
+      return false;
+    }
+    return ObjectProvider.hasChildren(object);
+  },
+
+  getLabel(object) {
+    if (object instanceof Header) {
+      return object.name;
+    }
+    return ObjectProvider.getLabel(object);
+  },
+
+  getValue(object) {
+    if (object instanceof Header) {
+      return object.value;
+    }
+    return ObjectProvider.getValue(object);
+  },
+
+  getKey(object) {
+    if (object instanceof Header) {
+      return object.key;
+    }
+    return ObjectProvider.getKey(object);
+  },
+
+  getType(object) {
+    if (object instanceof Header) {
+      return "string";
+    }
+    return ObjectProvider.getType(object);
+  },
+};
+
+/**
+ * Helper data structures for list of headers.
+ */
+function HeaderList(headers) {
+  // Clone, so the sort doesn't affect the original array.
+  this.headers = headers.slice(0);
+  this.headers.sort((a, b) => {
+    return a.name.toLowerCase().localeCompare(b.name.toLowerCase());
+  });
+}
+
+function Header(name, value, key) {
+  this.name = name;
+  this.value = value;
+  this.key = key;
+}
+
+module.exports = {
+  HeadersProvider,
+  HeaderList,
+};