1 files changed, 100 insertions, 0 deletions
diff --git a/devtools/client/shared/components/tree/tree-header.js b/devtools/client/shared/components/tree/tree-header.js
new file mode 100644
index 000000000..eec5363dd
--- /dev/null
+++ b/devtools/client/shared/components/tree/tree-header.js
@@ -0,0 +1,100 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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";
+
+// Make this available to both AMD and CJS environments
+define(function (require, exports, module) {
+  // ReactJS
+  const React = require("devtools/client/shared/vendor/react");
+
+  // Shortcuts
+  const { thead, tr, td, div } = React.DOM;
+  const PropTypes = React.PropTypes;
+
+  /**
+   * This component is responsible for rendering tree header.
+   * It's based on <thead> element.
+   */
+  let TreeHeader = React.createClass({
+    displayName: "TreeHeader",
+
+    // See also TreeView component for detailed info about properties.
+    propTypes: {
+      // Custom tree decorator
+      decorator: PropTypes.object,
+      // True if the header should be visible
+      header: PropTypes.bool,
+      // Array with column definition
+      columns: PropTypes.array
+    },
+
+    getDefaultProps: function () {
+      return {
+        columns: [{
+          id: "default"
+        }]
+      };
+    },
+
+    getHeaderClass: function (colId) {
+      let decorator = this.props.decorator;
+      if (!decorator || !decorator.getHeaderClass) {
+        return [];
+      }
+
+      // Decorator can return a simple string or array of strings.
+      let classNames = decorator.getHeaderClass(colId);
+      if (!classNames) {
+        return [];
+      }
+
+      if (typeof classNames == "string") {
+        classNames = [classNames];
+      }
+
+      return classNames;
+    },
+
+    render: function () {
+      let cells = [];
+      let visible = this.props.header;
+
+      // Render the rest of the columns (if any)
+      this.props.columns.forEach(col => {
+        let cellStyle = {
+          "width": col.width ? col.width : "",
+        };
+
+        let classNames = [];
+
+        if (visible) {
+          classNames = this.getHeaderClass(col.id);
+          classNames.push("treeHeaderCell");
+        }
+
+        cells.push(
+          td({
+            className: classNames.join(" "),
+            style: cellStyle,
+            key: col.id},
+            div({ className: visible ? "treeHeaderCellBox" : "" },
+              visible ? col.title : ""
+            )
+          )
+        );
+      });
+
+      return (
+        thead({}, tr({ className: visible ? "treeHeaderRow" : "" },
+          cells
+        ))
+      );
+    }
+  });
+
+  // Exports from this module
+  module.exports = TreeHeader;
+});