Clean-up key tester.

This fixes a bunch of small nits:
* JSCompile is now enabled for this app.
* No need to manually focus the PNaCl plugin.
* Distinguishes between left and right modifiers for PNaCl events.
* Debug log is hidden by default, and selectable when shown.
* Minor CSS tweaks and code clean-up.

Review URL: https://codereview.chromium.org/900983003

Cr-Commit-Position: refs/heads/master@{#314674}

6 files changed, 254 insertions, 175 deletions

diff --git a/remoting/remoting_key_tester.gypi b/remoting/remoting_key_tester.gypi
index d1aab86..131d957 100644
--- a/remoting/remoting_key_tester.gypi
+++ b/remoting/remoting_key_tester.gypi
@@ -11,6 +11,7 @@
     'remoting_key_tester_js_files': [
         'tools/javascript_key_tester/background.js',
         'tools/javascript_key_tester/chord_tracker.js',
+        'tools/javascript_key_tester/event_listeners.js',
         'tools/javascript_key_tester/keyboard_map.js',
         'tools/javascript_key_tester/main.js',
      ],
@@ -45,9 +46,7 @@
           'target_name': 'remoting_key_tester_jscompile',
           'type': 'none',
           'conditions': [
-            # TODO(lukasza): Enable when remoting_key_tester_jscompile is clean.
-            # ['run_jscompile != 0', {
-            ['0 != 0', {
+            ['run_jscompile != 0', {
               'variables': {
                 'success_stamp': '<(PRODUCT_DIR)/<(_target_name).stamp',
               },
@@ -56,6 +55,7 @@
                   'action_name': 'jscompile remoting_key_tester',
                   'inputs': [
                     '<@(remoting_key_tester_js_files)',
+                    'webapp/js_proto/chrome_proto.js'
                   ],
                   'outputs': [
                     '<(success_stamp)',
@@ -66,6 +66,7 @@
                     '--no-single-file',
                     '--success-stamp', '<(success_stamp)',
                     '<@(remoting_key_tester_js_files)',
+                    'webapp/js_proto/chrome_proto.js'
                   ],
                 },
               ],  # actions
diff --git a/remoting/tools/javascript_key_tester/chord_tracker.js b/remoting/tools/javascript_key_tester/chord_tracker.js
index a7cded1..ca1cdb4 100644
--- a/remoting/tools/javascript_key_tester/chord_tracker.js
+++ b/remoting/tools/javascript_key_tester/chord_tracker.js
@@ -8,34 +8,39 @@
  * @param {HTMLElement} parentDiv
  */
 var ChordTracker = function(parentDiv) {
+  /** @type {HTMLElement} */
   this.parentDiv_ = parentDiv;
+  /** @type {HTMLElement} */
   this.currentDiv_ = null;
+  /** @type {Object.<HTMLElement>} */
   this.pressedKeys_ = {};
 };
 
 /**
- * @param {number} keyCode
+ * @param {number|string} keyId Either a Javascript key-code, or a PNaCl "code"
+ *     string.
  * @param {string} title
  * @return {void}
  */
-ChordTracker.prototype.addKeyUpEvent = function(keyCode, title) {
-  var text = this.keyName_(keyCode);
+ChordTracker.prototype.addKeyUpEvent = function(keyId, title) {
+  var text = this.keyName_(keyId);
   var span = this.addSpanElement_('key-up', text, title);
-  delete this.pressedKeys_[keyCode];
+  delete this.pressedKeys_[keyId];
   if (!this.keysPressed_()) {
     this.end_();
   }
 };
 
 /**
- * @param {number} keyCode
+ * @param {number|string} keyId Either a Javascript key-code, or a PNaCl "code"
+ *     string.
  * @param {string} title
  * @return {void}
  */
-ChordTracker.prototype.addKeyDownEvent = function(keyCode, title) {
-  var text = this.keyName_(keyCode);
+ChordTracker.prototype.addKeyDownEvent = function(keyId, title) {
+  var text = this.keyName_(keyId);
   var span = this.addSpanElement_('key-down', text, title);
-  this.pressedKeys_[keyCode] = span;
+  this.pressedKeys_[keyId] = span;
 };
 
 /**
@@ -63,11 +68,13 @@ ChordTracker.prototype.releaseAllKeys = function() {
  * @param {string} className
  * @param {string} text
  * @param {string} title
+ * @return {HTMLElement}
  */
 ChordTracker.prototype.addSpanElement_ = function(className, text, title) {
   this.begin_();
-  var span = document.createElement('span');
+  var span = /** @type {HTMLElement} */ (document.createElement('span'));
   span.classList.add(className);
+  span.classList.add('key-div');
   span.innerText = text;
   span.title = title;
   this.currentDiv_.appendChild(span);
@@ -81,7 +88,7 @@ ChordTracker.prototype.begin_ = function() {
   if (this.currentDiv_) {
     return;
   }
-  this.currentDiv_ = document.createElement('div');
+  this.currentDiv_ = /** @type {HTMLElement} */ (document.createElement('div'));
   this.currentDiv_.classList.add('chord-div');
   this.parentDiv_.appendChild(this.currentDiv_);
 };
@@ -113,15 +120,18 @@ ChordTracker.prototype.keysPressed_ = function() {
 };
 
 /**
- * @param {number} keyCode The keyCode field of the keyup or keydown event.
+ * @param {number|string} keyId Either a Javascript key-code, or a PNaCl "code"
+ *     string.
  * @return {string} A human-readable representation of the key.
  * @private
  */
-ChordTracker.prototype.keyName_ = function(keyCode) {
-  var result = keyboardMap[keyCode];
+ChordTracker.prototype.keyName_ = function(keyId) {
+  if (typeof keyId == 'string') {
+    return keyId;
+  }
+  var result = keyboardMap[keyId];
   if (!result) {
-    result = '<' + keyCode + '>';
+    result = '<' + keyId + '>';
   }
   return result;
 };
-
diff --git a/remoting/tools/javascript_key_tester/event_listeners.js b/remoting/tools/javascript_key_tester/event_listeners.js
new file mode 100644
index 0000000..73c67e9
--- /dev/null
+++ b/remoting/tools/javascript_key_tester/event_listeners.js
@@ -0,0 +1,153 @@
+/* Copyright 2015 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/** @constructor */
+var PNaClEvent = function() {
+  /** @type {string} */
+  this.type = "";
+  /** @type {number} */
+  this.modifiers = 0;
+  /** @type {number} */
+  this.keyCode = 0;
+  /** @type {string} */
+  this.characterText = '';
+  /** @type {string} */
+  this.code = '';
+};
+
+
+/**
+ * @param {HTMLElement} jsLog
+ * @param {HTMLElement} pnaclLog
+ * @param {HTMLElement} textLog
+ * @param {HTMLElement} pnaclPlugin
+ * @param {HTMLElement} pnaclListener
+ * @constructor
+ */
+var EventListeners = function(jsLog, pnaclLog, textLog,
+                              pnaclPlugin, pnaclListener) {
+  this.pnaclPlugin_ = pnaclPlugin;
+  this.pnaclListener_ = pnaclListener;
+  this.textLog_ = textLog;
+
+  this.onKeyDownHandler_ = this.onKeyDown_.bind(this);
+  this.onKeyUpHandler_ = this.onKeyUp_.bind(this);
+  this.onMessageHandler_ = this.onMessage_.bind(this);
+  this.onBlurHandler_ = this.onBlur_.bind(this);
+
+  this.jsChordTracker_ = new ChordTracker(jsLog);
+  this.pnaclChordTracker_ = new ChordTracker(pnaclLog);
+
+  this.startTime_ = new Date();
+};
+
+/**
+ * Start listening for keyboard events.
+ */
+EventListeners.prototype.activate = function() {
+  document.body.addEventListener('keydown', this.onKeyDownHandler_, false);
+  document.body.addEventListener('keyup', this.onKeyUpHandler_, false);
+  this.pnaclListener_.addEventListener('message', this.onMessageHandler_, true);
+  this.pnaclPlugin_.addEventListener('blur', this.onBlurHandler_, false);
+  this.onBlur_();
+};
+
+/**
+ * Stop listening for keyboard events.
+ */
+EventListeners.prototype.deactivate = function() {
+  document.body.removeEventListener('keydown', this.onKeyDownHandler_, false);
+  document.body.removeEventListener('keyup', this.onKeyUpHandler_, false);
+  this.pnaclListener_.removeEventListener(
+      'message', this.onMessageHandler_, true);
+  this.pnaclPlugin_.removeEventListener('blur', this.onBlurHandler_, false);
+};
+
+/**
+ * @param {Event} event
+ * @private
+ */
+EventListeners.prototype.onKeyDown_ = function(event) {
+  this.appendToTextLog_(this.jsonifyJavascriptKeyEvent_(event, 'keydown'));
+  this.jsChordTracker_.addKeyDownEvent(
+      event.keyCode, this.jsonifyJavascriptKeyEvent_(event, 'keydown', 2));
+};
+
+/**
+ * @param {Event} event
+ * @return {void}
+ */
+EventListeners.prototype.onKeyUp_ = function(event) {
+  this.appendToTextLog_(this.jsonifyJavascriptKeyEvent_(event, 'keyup'));
+  this.jsChordTracker_.addKeyUpEvent(
+      event.keyCode, this.jsonifyJavascriptKeyEvent_(event, 'keyup', 2));
+}
+
+/**
+ * @param {Event} event
+ * @return {void}
+ */
+EventListeners.prototype.onMessage_ = function (event) {
+  var pnaclEvent = /** @type {PNaClEvent} */ (event['data']);
+
+  this.appendToTextLog_(this.jsonifyPnaclKeyboardInputEvent_(pnaclEvent));
+  var title = this.jsonifyPnaclKeyboardInputEvent_(pnaclEvent, 2);
+  if (pnaclEvent.type == "KEYDOWN") {
+    this.pnaclChordTracker_.addKeyDownEvent(pnaclEvent.code, title);
+  }
+  if (pnaclEvent.type == "KEYUP") {
+    this.pnaclChordTracker_.addKeyUpEvent(pnaclEvent.code, title);
+  }
+  if (pnaclEvent.type == "CHAR") {
+    this.pnaclChordTracker_.addCharEvent(pnaclEvent.characterText, title);
+  }
+}
+
+/**
+ * @return {void}
+ */
+EventListeners.prototype.onBlur_ = function() {
+  this.pnaclPlugin_.focus();
+};
+
+/**
+ * @param {string} str
+ * @private
+ */
+EventListeners.prototype.appendToTextLog_ = function(str) {
+  var div = document.createElement('div');
+  div.innerText = (new Date() - this.startTime_) + ':' + str;
+  this.textLog_.appendChild(div);
+};
+
+/**
+ * @param {Event} event
+ * @param {string} eventName
+ * @param {number=} opt_space
+ * @return {string}
+ * @private
+ */
+EventListeners.prototype.jsonifyJavascriptKeyEvent_ =
+    function(event, eventName, opt_space) {
+  return "JavaScript '" + eventName + "' event = " + JSON.stringify(
+      event,
+      ['type', 'alt', 'shift', 'control', 'meta', 'charCode', 'keyCode',
+       'keyIdentifier', 'repeat'],
+      opt_space);
+};
+
+/**
+ * @param {PNaClEvent} event
+ * @param {number=} opt_space
+ * @return {string}
+ * @private
+ */
+EventListeners.prototype.jsonifyPnaclKeyboardInputEvent_ =
+    function(event, opt_space) {
+  return "PNaCl KeyboardInputEvent = " + JSON.stringify(
+      event,
+      ['type', 'modifiers', 'keyCode', 'characterText', 'code'],
+      opt_space);
+};
diff --git a/remoting/tools/javascript_key_tester/main.css b/remoting/tools/javascript_key_tester/main.css
index 8010f61..0c6f4e5 100644
--- a/remoting/tools/javascript_key_tester/main.css
+++ b/remoting/tools/javascript_key_tester/main.css
@@ -12,44 +12,44 @@ html {
   height: 100%;
 }
 
-#pnacl-plugin {
-  background-color: gray;
-  border: 1px solid
-}
-
-#pnacl-plugin:focus {
-  background-color: yellow;
-}
-
 .summary-log-container {
   width: 50%;
-  height: 50vh;
+  height: 100%;
   overflow-y: auto;
   float: left;
 }
 
-.text-log-container {
-  width: 100%;
-  max-height: 25vh;
-  overflow-y: auto;
-  float: left;
+#text-log-container {
+  position: fixed;
+  top: 32px;
+  left: 16px;
+  right: 16px;
+  bottom: 32px;
+  border: 1px solid gray;
+  box-shadow: 0px 4px 10px 4px rgba(0,0,0,0.3);
+  background-color: white;
+  overflow: scroll;
 }
 
-.char-event,
-.key-down,
-.key-up {
+#text-log {
+  padding: 8px;
+}
+
+.selectable {
+  -webkit-user-select: text;
+  cursor: text;
+}
+
+.key-div {
   border-radius: 4px;
   border: 1px solid rgba(0, 0, 0, 0.3);
   padding: 2px;
   margin-right: 2px;
+  display: inline-block;
 }
 
 .char-event {
-  background-color: yellow;
-}
-
-.char-event::before {
-  content: "char:";
+  background-color: #DDF;
 }
 
 .key-up {
@@ -57,7 +57,7 @@ html {
 }
 
 .key-up::before {
-  content: "-";
+  content: "\2011";  /** non-breaking hyphen */
 }
 
 .key-down {
@@ -93,3 +93,9 @@ html {
   content: " \2716";  /* cross */
   color: red;
 }
+
+.controls {
+  position: absolute;
+  right: 8px;
+  top: 8px;
+}
\ No newline at end of file
diff --git a/remoting/tools/javascript_key_tester/main.html b/remoting/tools/javascript_key_tester/main.html
index 791c024..dfdf634 100644
--- a/remoting/tools/javascript_key_tester/main.html
+++ b/remoting/tools/javascript_key_tester/main.html
@@ -9,20 +9,21 @@ found in the LICENSE file.
   <head>
     <title>Chrome AppsV2 Key Event Tester</title>
     <script src="chord_tracker.js"></script>
+    <script src="event_listeners.js"></script>
     <script src="keyboard_map.js"></script>
     <script src="main.js"></script>
     <link rel="stylesheet" href="main.css">
   </head>
   <body>
     <h2>Chrome AppsV2  Key Event Tester</h2>
+    <div class="controls">
+      <button id="show-log">Debug log</button>
+      <button id="clear-log">Clear logs</button>
+    </div>
     <div id="pnacl-listener">
-      PNaCl focus box:
-      <embed id="pnacl-plugin" width=100 height=12
+      <embed id="pnacl-plugin" width=0 height=0
              src="remoting_key_tester.nmf" type="application/x-pnacl" />
-      (click inside to get focus, yellow background means it has focus).
     </div>
-    <button id="clear-log">Clear logs</button>
-    <hr/>
     <div class="logs">
       <div class="summary-log-container">
         Summary of JavaScript logs:
@@ -34,9 +35,13 @@ found in the LICENSE file.
         <div id="pnacl-log">
         </div>
       </div>
-      <div class="text-log-container">
-        Text log of JSON-ified events:
-        <div id="text-log">
+      <div id="text-log-container" hidden>
+        <div>
+        </div>
+        <div class="controls">
+          <button id="hide-log">Close</button>
+        </div>
+        <div id="text-log" class="selectable">
         </div>
       </div>
     </div>
diff --git a/remoting/tools/javascript_key_tester/main.js b/remoting/tools/javascript_key_tester/main.js
index e37e426..1dc8bbe 100644
--- a/remoting/tools/javascript_key_tester/main.js
+++ b/remoting/tools/javascript_key_tester/main.js
@@ -3,140 +3,44 @@
  * found in the LICENSE file.
  */
 
-/**
- * @param {string} eventName
- * @param {number=} opt_space
- * @return {string}
- */
-function jsonifyJavascriptKeyEvent(event, eventName, opt_space) {
-  return "JavaScript '" + eventName + "' event = " + JSON.stringify(
-      event,
-      ['type', 'alt', 'shift', 'control', 'meta', 'charCode', 'keyCode',
-          'keyIdentifier', 'repeat'],
-      opt_space);
-};
-
-/**
- * @param {ChordTracker} jsChordTracker
- * @param {Event} event
- * @return {void}
- */
-function handleJavascriptKeyDownEvent(jsChordTracker, event) {
-  appendToTextLog(jsonifyJavascriptKeyEvent(event, 'keydown', undefined));
-  jsChordTracker.addKeyDownEvent(
-      event.keyCode, jsonifyJavascriptKeyEvent(event, 'keydown', 2));
-}
-
-/**
- * @param {ChordTracker} jsChordTracker
- * @param {Event} event
- * @return {void}
- */
-function handleJavascriptKeyUpEvent(jsChordTracker, event) {
-  appendToTextLog(jsonifyJavascriptKeyEvent(event, 'keyup', undefined));
-  jsChordTracker.addKeyUpEvent(
-      event.keyCode, jsonifyJavascriptKeyEvent(event, 'keyup', 2));
-}
-
-/** @constructor */
-var PNaClEvent = function() {
-  /** @type {string} */
-  this.type = "";
-  /** @type {number} */
-  this.modifiers = 0;
-  /** @type {number} */
-  this.keyCode = 0;
-  /** @type {string|undefined} */
-  this.characterText = undefined;
-  /** @type {string} */
-  this.code = "";
-};
-
-/**
- * @param {PNaClEvent} event
- * @param {number|undefined} space
- * @return {string}
- */
-function jsonifyPnaclKeyboardInputEvent(event, space) {
-  return "PNaCl KeyboardInputEvent = " + JSON.stringify(
-      event,
-      ['type', 'modifiers', 'keyCode', 'characterText', 'code'],
-      space);
-};
-
-/**
- * @param {ChordTracker} pnaclChordTracker
- * @param {Event} event
- * @return {void}
- */
-function handlePNaclMessage(pnaclChordTracker, event) {
-  var pnaclEvent = /** @type {PNaClEvent} */ (event.data);
-
-  appendToTextLog(jsonifyPnaclKeyboardInputEvent(pnaclEvent, undefined));
-  var title = jsonifyPnaclKeyboardInputEvent(pnaclEvent, 2);
-  if (pnaclEvent.type == "KEYDOWN") {
-    pnaclChordTracker.addKeyDownEvent(pnaclEvent.keyCode, title);
-  }
-  if (pnaclEvent.type == "KEYUP") {
-    pnaclChordTracker.addKeyUpEvent(pnaclEvent.keyCode, title);
-  }
-  if (pnaclEvent.type == "CHAR") {
-    pnaclChordTracker.addCharEvent(pnaclEvent.characterText, title);
-  }
-}
-
-/**
- * @param {string} str
- * @return {void}
- */
-function appendToTextLog(str) {
-  var textLog = document.getElementById('text-log');
-  var div = document.createElement('div');
-  div.innerText = str;
-  textLog.appendChild(div);
-}
-
 function onLoad() {
-  // Start listening to Javascript keyup/keydown events.
   var jsLog = document.getElementById('javascript-log');
-  var jsChordTracker = new ChordTracker(jsLog);
-  document.body.addEventListener(
-      'keydown',
-      function (event) {
-        handleJavascriptKeyDownEvent(jsChordTracker, event);
-      },
-      false);
-  document.body.addEventListener(
-      'keyup',
-      function (event) {
-        handleJavascriptKeyUpEvent(jsChordTracker, event);
-      },
-      false);
-
-  // Start listening to PNaCl keyboard input events.
   var pnaclLog = document.getElementById('pnacl-log');
-  var pnaclChordTracker = new ChordTracker(pnaclLog);
-  document.getElementById('pnacl-listener').addEventListener(
-       'message',
-       function (message) {
-         handlePNaclMessage(pnaclChordTracker, message);
-       },
-       true);
+  var pnaclPlugin = document.getElementById('pnacl-plugin');
+  var pnaclListener = document.getElementById('pnacl-listener');
+  var textLog = document.getElementById('text-log');
+  var textLogContainer = document.getElementById('text-log-container');
+
+  var eventListeners = new EventListeners(jsLog, pnaclLog, textLog,
+                                          pnaclPlugin, pnaclListener);
+  eventListeners.activate();
 
-  // Start listening to generic, source-agnostic events.
-  window.addEventListener(
-      'blur',
-      function () {
-        jsChordTracker.releaseAllKeys();
-        pnaclChordTracker.releaseAllKeys();
-      },
-      false);
   document.getElementById('clear-log').addEventListener(
       'click',
       function() {
         jsLog.innerText = '';
         pnaclLog.innerText = '';
-        document.getElementById('text-log').innerText = '';
+        textLog.innerText = '';
+      },
+      false);
+  document.getElementById('show-log').addEventListener(
+      'click',
+      function() {
+        eventListeners.deactivate();
+        textLogContainer.hidden = false;
+
+        var selection = window.getSelection();
+        var range = document.createRange();
+        range.selectNodeContents(textLog);
+        selection.removeAllRanges();
+        selection.addRange(range);
+      },
+      false);
+  document.getElementById('hide-log').addEventListener(
+      'click',
+      function() {
+        eventListeners.activate();
+        textLogContainer.hidden = true;
       },
       false);
 }