add extension chrome.windows.onFocusChanged

atom/common/api/resources/windows_bindings.js

@@ -1,53 +1,104 @@
+var binding = require('binding').Binding.create('windows')
+
 var ipc = require('ipc_utils')
 
 var id = 1;
 
-var binding = {
-  getCurrent: function () {
-    var cb, getInfo;
-    if (arguments.length == 1) {
+binding.registerCustomHook(function (bindingsAPI, extensionId) {
+  var apiFunctions = bindingsAPI.apiFunctions
+  var windows = bindingsAPI.compiledApi
+
+  apiFunctions.setHandleRequest('getLastFocused', function (getInfo, cb) {
+    console.warn('chrome.windows.getLastFocused is not supported yet')
+  })
+
+  apiFunctions.setHandleRequest('remove', function (windowId, cb) {
+    console.warn('chrome.windows.remove is not supported yet')
+  })
+
+  apiFunctions.setHandleRequest('get', function (windowId, getInfo, cb) {
+    console.warn('chrome.windows.get is not supported yet')
+  })
+
+  apiFunctions.setHandleRequest('create', function (createData, cb) {
+    console.warn('chrome.windows.create is not supported yet')
+  })
+
+  apiFunctions.setHandleRequest('getCurrent', function () {
+    var cb, getInfo
+    if (arguments.length === 1) {
       cb = arguments[0]
     } else {
       getInfo = arguments[0]
       cb = arguments[1]
     }
 
     var responseId = ++id
-    ipc.once('chrome-windows-get-current-response-' + responseId, function(evt, win) {
+    ipc.once('chrome-windows-get-current-response-' + responseId, function (evt, win) {
       cb(win)
     })
     ipc.send('chrome-windows-get-current', responseId, getInfo)
-  },
+  })
 
-  getAll: function (getInfo, cb) {
-    if (arguments.length == 1) {
+  apiFunctions.setHandleRequest('getAll', function (getInfo, cb) {
+    if (arguments.length === 1) {
       cb = arguments[0]
     } else {
       getInfo = arguments[0]
       cb = arguments[1]
     }
 
     var responseId = ++id
-    ipc.once('chrome-windows-get-all-response-' + responseId, function(evt, win) {
+    ipc.once('chrome-windows-get-all-response-' + responseId, function (evt, win) {
       cb(win)
     })
     ipc.send('chrome-windows-get-all', responseId, getInfo)
-  },
+  })
 
-  create: function (createData, cb) {
-    console.warn('chrome.windows.create is not supported yet')
-  },
-
-  update: function (windowId, updateInfo, cb) {
+  apiFunctions.setHandleRequest('update', function (windowId, updateInfo, cb) {
     var responseId = ++id
     cb && ipc.once('chrome-windows-update-response-' + responseId, function (evt, win) {
       cb(win)
     })
     ipc.send('chrome-windows-update', responseId, windowId, updateInfo)
-  },
+  })
+
+  windows.onCreated = {
+    addListener: function (callback) {
+      console.warn('chrome.windows.onCreated is not supported yet')
+    },
+
+    Filters: function () {
+      console.warn('chrome.windows.onCreated filters are not supported yet')
+    }
+  }
+
+  windows.onRemoved = {
+    addListener: function (callback) {
+      console.warn('chrome.windows.onRemoved is not supported yet')
+    },
+
+    Filters: function () {
+      console.warn('chrome.windows.onRemoved filters are not supported yet')
+    }
+  }
+
+  windows.onFocusChanged = {
+    addListener: function (cb) {
+      ipc.send('register-chrome-window-focus', extensionId)
+      ipc.on('chrome-window-focus', function (evt, windowId) {
+        cb(windowId)
+      })
+    },
+
+    Filters: function () {
+      console.warn('chrome.windows.onFocusChanged filters are not supported yet')
+    }
+  }
+
+  windows.WINDOW_ID_NONE = -1
+  windows.WINDOW_ID_CURRENT = -2
+})
 
-  WINDOW_ID_NONE: -1,
-  WINDOW_ID_CURRENT: -2
-};
+exports.$set('binding', binding.generate())
 
-exports.binding = binding;

lib/browser/api/extensions.js

@@ -65,8 +65,7 @@ var addBackgroundPageEvent = function (extensionId, event) {
 }
 
 var sendToBackgroundPages = function (extensionId, session, event) {
-  if (!backgroundPageEvents[event] || !session)
-    return
+  if (!backgroundPageEvents[event] || !session) { return }
 
   var pages = []
   if (extensionId === 'all') {
@@ -79,8 +78,10 @@ var sendToBackgroundPages = function (extensionId, session, event) {
   var args = [].slice.call(arguments, 2)
   pages.forEach(function (backgroundPage) {
     try {
-      // only send to background pages in the same browser context
-      if (backgroundPage.session.equal(session)) {
+      var sendToAll = (typeof (session) === 'string' && session === 'all')
+      // otherwise, only send to background pages in the same browser context
+
+      if (sendToAll || backgroundPage.session.equal(session)) {
         backgroundPage.send.apply(backgroundPage, args)
       }
     } catch (e) {
@@ -480,6 +481,35 @@ tabEvents.forEach((event_name) => {
   })
 })
 
+ipcMain.on('register-chrome-window-focus', function (evt, extensionId) {
+    addBackgroundPageEvent(extensionId, 'chrome-window-focus')
+})
+
+app.on('browser-window-focus', function (event, browserWindow) {
+  var forthcomingWindow = browserWindow
+  var forthcomingId = (forthcomingWindow == null) ? -1 : forthcomingWindow.id
+
+  // Only background pages have access to chrome.window, so this is enough
+  // We do need to send this to all sessions though
+  sendToBackgroundPages('all', 'all', 'chrome-window-focus', forthcomingId)
+})
+
+app.on('browser-window-blur', function (event, browserWindow) {
+  // see https://github.com/electron/electron/issues/4942
+  setImmediate(function () {
+    var forthcomingWindow = BrowserWindow.getFocusedWindow()
+
+    var forthcomingId = (forthcomingWindow == null) ? -1 : forthcomingWindow.id
+    var previousId = browserWindow.id
+
+    var allWindowsBlurred = (forthcomingId === -1 && previousId !== -1)
+    if (allWindowsBlurred) {
+      var blurredResponse = -1
+      sendToBackgroundPages('all', 'all', 'chrome-window-focus', blurredResponse)
+    }
+  })
+})
+
 // chrome.windows
 var windowInfo = function (win, populateTabs) {
   var bounds = win.getBounds()