API proposal for chrome.app.window to intercept all keys.

chrome/test/data/extensions/platform_apps/window_api_intercept_all_keys/no_permission/main.js

Index: chrome/test/data/extensions/platform_apps/window_api_intercept_all_keys/no_permission/main.js
diff --git a/chrome/test/data/extensions/platform_apps/window_api_intercept_all_keys/no_permission/main.js b/chrome/test/data/extensions/platform_apps/window_api_intercept_all_keys/no_permission/main.js
new file mode 100644
index 0000000000000000000000000000000000000000..4151b531fff085bc570b52666db0366ceeb0fecb
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+++ b/chrome/test/data/extensions/platform_apps/window_api_intercept_all_keys/no_permission/main.js
@@ -0,0 +1,82 @@
+// Copyright 2013 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.
+
+var mainWindow;
+var debug = 0;
+if (debug) {
+  chrome.test.log = function(msg) {
+    console.log(msg);
+  }
+}
+
+function onReply(reply)  {
+  switch (reply) {
+    case 'enable':
+      chrome.test.log('enabling intercept all keys');
+      mainWindow.setInterceptAllKeys(true);
+      break;
+    case 'disable':
+      chrome.test.log('disabling intercept all keys');
+      mainWindow.setInterceptAllKeys(false);
+      break;
+  }
+  chrome.test.sendMessage('readyForCommand', onReply);
+}
+
+function onKeyUp(e) {
+  handleEvent(e);
+  chrome.test.sendMessage('KeyReceived: '+ e.keyCode);
+  return false;
+}
+
+// Based on keyevent browser test to convert event to string.
+// Format used is:
+// <type> <keyCode> <charCode> <ctrlKey> <shiftKey> <altKey> <commandKey>
+// where <type> may be 'D' (keydown), 'P' (keypress) or 'U' (keyup).
+// <ctrlKey>, <shiftKey> <altKey> and <commandKey> are boolean value indicating
+// the state of corresponding modifier key.
+function handleEvent(e) {
+  var prefixes = {
+    'keydown': 'D',
+    'keypress': 'P',
+    'keyup': 'U',
+    'textInput': 'T',
+  };
+
+  var evt = e || window.event;
+  var result = prefixes[evt.type] + ' ';
+  if (evt.type == 'textInput') {
+    result += evt.data;
+  } else {
+    // On Linux, the keydown event of a modifier key doesn't have the
+    // corresponding modifier attribute set, while the keyup event does have,
+    // eg. pressing and releasing ctrl may generate a keydown event with
+    // ctrlKey=false and a keyup event with ctrlKey=true.
+    // But Windows and Mac have opposite behavior than Linux.
+    // To make the C++ testing code simpler, if it's a modifier key event,
+    // then ignores the corresponding modifier attribute by setting it to true.
+    var keyId = evt.keyIdentifier;
+    result += (evt.keyCode + ' ' + evt.charCode + ' ' +
+        (keyId == 'Control' ? true : evt.ctrlKey) + ' ' +
+        (keyId == 'Shift' ? true : evt.shiftKey) + ' ' +
+        (keyId == 'Alt' ? true : evt.altKey) + ' ' +
+        (keyId == 'Meta' ? true : evt.metaKey));
+  }
+
+  chrome.test.log(result);
+  chrome.test.sendMessage(result);
+  return false;
+}
+
+chrome.app.runtime.onLaunched.addListener(function() {
+  chrome.app.window.create('main.html', {}, function(win) {
+    mainWindow = win;
+    win.contentWindow.document.addEventListener('keydown', handleEvent);
+    win.contentWindow.document.addEventListener('keypress', handleEvent);
+    win.contentWindow.document.addEventListener('keyup', onKeyUp);
+
+    chrome.test.sendMessage('Launched');
+    chrome.test.sendMessage('readyForCommand', onReply);
+  });
+});