From ec0e8f9dd681b683b8fb51f14c5ec0e74c24ff54 Mon Sep 17 00:00:00 2001
From: Nicolas Gotchac <ngotchac@gmail.com>
Date: Fri, 3 Mar 2017 19:49:36 +0100
Subject: [PATCH] Add StackEventListener (#4745)

---
 js/src/ui/Portal/portal.js                    |  9 +--
 js/src/ui/StackEventListener/index.js         | 17 ++++++
 .../StackEventListener/stackEventListener.js  | 56 +++++++++++++++++++
 3 files changed, 76 insertions(+), 6 deletions(-)
 create mode 100644 js/src/ui/StackEventListener/index.js
 create mode 100644 js/src/ui/StackEventListener/stackEventListener.js

diff --git a/js/src/ui/Portal/portal.js b/js/src/ui/Portal/portal.js
index 9d270b0cc..f4c64bf46 100644
--- a/js/src/ui/Portal/portal.js
+++ b/js/src/ui/Portal/portal.js
@@ -14,7 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import EventListener from 'react-event-listener';
 import React, { Component, PropTypes } from 'react';
 import ReactDOM from 'react-dom';
 import ReactPortal from 'react-portal';
@@ -23,6 +22,7 @@ import keycode from 'keycode';
 import { nodeOrStringProptype } from '~/util/proptypes';
 import { CloseIcon } from '~/ui/Icons';
 import ParityBackground from '~/ui/ParityBackground';
+import StackEventListener from '~/ui/StackEventListener';
 import Title from '~/ui/Title';
 
 import styles from './portal.css';
@@ -93,10 +93,7 @@ export default class Portal extends Component {
             onClick={ this.handleContainerClick }
             onKeyDown={ this.handleKeyDown }
           >
-            <EventListener
-              target='window'
-              onKeyUp={ this.handleKeyUp }
-            />
+            <StackEventListener onKeyUp={ this.handleKeyUp } />
             <ParityBackground className={ styles.parityBackground } />
             { this.renderClose() }
             <Title
@@ -186,7 +183,7 @@ export default class Portal extends Component {
     switch (codeName) {
       case 'esc':
         event.preventDefault();
-        return this.handleClose();
+        return this.props.onClose();
     }
   }
 
diff --git a/js/src/ui/StackEventListener/index.js b/js/src/ui/StackEventListener/index.js
new file mode 100644
index 000000000..e046c51d5
--- /dev/null
+++ b/js/src/ui/StackEventListener/index.js
@@ -0,0 +1,17 @@
+// Copyright 2015-2017 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export default from './stackEventListener';
diff --git a/js/src/ui/StackEventListener/stackEventListener.js b/js/src/ui/StackEventListener/stackEventListener.js
new file mode 100644
index 000000000..586ddcad6
--- /dev/null
+++ b/js/src/ui/StackEventListener/stackEventListener.js
@@ -0,0 +1,56 @@
+// Copyright 2015-2017 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import ReactEventListener from 'react-event-listener';
+import React, { Component, PropTypes } from 'react';
+
+let listenerId = 0;
+let listenerIds = [];
+
+export default class StackEventListener extends Component {
+  static propTypes = {
+    onKeyUp: PropTypes.func.isRequired
+  };
+
+  componentWillMount () {
+    // Add to the list of listeners on mount
+    this.id = ++listenerId;
+    listenerIds.push(this.id);
+  }
+
+  componentWillUnmount () {
+    // Remove from the listeners list on unmount
+    listenerIds = listenerIds.filter((id) => this.id !== id);
+  }
+
+  render () {
+    return (
+      <ReactEventListener
+        target='window'
+        onKeyUp={ this.handleKeyUp }
+      />
+    );
+  }
+
+  handleKeyUp = (event) => {
+    // Only handle event if last of the listeners list
+    if (this.id !== listenerIds.slice(-1)[0]) {
+      return event;
+    }
+
+    return this.props.onKeyUp(event);
+  }
+}