1 files changed, 74 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/components/shared/Dropdown.js b/devtools/client/debugger/src/components/shared/Dropdown.js
new file mode 100644
index 0000000000..a47eef9534
--- /dev/null
+++ b/devtools/client/debugger/src/components/shared/Dropdown.js
@@ -0,0 +1,74 @@
+/* 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/>. */
+
+import { Component } from "devtools/client/shared/vendor/react";
+import { button, div } from "devtools/client/shared/vendor/react-dom-factories";
+import PropTypes from "devtools/client/shared/vendor/react-prop-types";
+
+export class Dropdown extends Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      dropdownShown: false,
+    };
+  }
+
+  static get propTypes() {
+    return {
+      icon: PropTypes.node.isRequired,
+      panel: PropTypes.node.isRequired,
+    };
+  }
+
+  toggleDropdown = e => {
+    this.setState(prevState => ({
+      dropdownShown: !prevState.dropdownShown,
+    }));
+  };
+
+  renderPanel() {
+    return div(
+      {
+        className: "dropdown",
+        onClick: this.toggleDropdown,
+        style: {
+          display: this.state.dropdownShown ? "block" : "none",
+        },
+      },
+      this.props.panel
+    );
+  }
+
+  renderButton() {
+    return button(
+      {
+        className: "dropdown-button",
+        onClick: this.toggleDropdown,
+      },
+      this.props.icon
+    );
+  }
+
+  renderMask() {
+    return div({
+      className: "dropdown-mask",
+      onClick: this.toggleDropdown,
+      style: {
+        display: this.state.dropdownShown ? "block" : "none",
+      },
+    });
+  }
+  render() {
+    return div(
+      {
+        className: "dropdown-block",
+      },
+      this.renderPanel(),
+      this.renderButton(),
+      this.renderMask()
+    );
+  }
+}
+
+export default Dropdown;