Reset Screen moved to ScreenContext.

chrome/browser/resources/chromeos/login/oobe_screen_reset.js

 // Copyright (c) 2012 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.
 
 /**
  * @fileoverview Device reset screen implementation.
  */
 
 login.createScreen('ResetScreen', 'reset', function() {
+  var USER_ACTION_CANCEL_RESET = 'cancel-reset';
+  var USER_ACTION_RESTART_PRESSED = 'restart-pressed';
+  var USER_ACTION_LEARN_MORE_PRESSED = 'learn-more-link';
+  var USER_ACTION_SHOW_CONFIRMATION = 'show-confirmation';
+  var CONTEXT_KEY_ROLLBACK_AVAILABLE = 'rollback-available';
+  var CONTEXT_KEY_ROLLBACK_CHECKED = 'rollback-checked';
+  var CONTEXT_KEY_IS_OFFICIAL_BUILD = 'is-official-build';
+  var CONTEXT_KEY_IS_CONFIRMATIONAL_VIEW = 'is-confirmational-view';
+  var CONTEXT_KEY_SCREEN_STATE = 'screen-state';
+
   return {
 
     /* Possible UI states of the reset screen. */
     RESET_SCREEN_UI_STATE: {
       REVERT_PROMISE: 'ui-state-revert-promise',
       RESTART_REQUIRED: 'ui-state-restart-required',
       POWERWASH_PROPOSAL: 'ui-state-powerwash-proposal',
-      ROLLBACK_PROPOSAL: 'ui-state-rollback-proposal'
+      ROLLBACK_PROPOSAL: 'ui-state-rollback-proposal',
+      ERROR: 'ui-state-error',
     },
 
-    EXTERNAL_API: [
-      'hideRollbackOption',
-      'showRollbackOption',
-      'updateViewOnRollbackCall'
-    ],
+    RESET_SCREEN_STATE: {
+      RESTART_REQUIRED: 0,
+      REVERT_PROMISE: 1,
+      POWERWASH_PROPOSAL: 2,  // supports 2 ui-states
+      ERROR: 3,
+    },
+
 
     /** @override */
     decorate: function() {
+      var self = this;
+
       $('powerwash-help-link').addEventListener('click', function(event) {

[dzhioev (left Google), 2015/02/11 12:38:29]

this.declareUserAction($('powerwash-help-link'),
                       { action_id: USER_ACTION_LEARN_MORE_PRESSED,
                         event: 'click'
                       });

[merkulova, 2015/02/11 15:07:17]

Done.

-        chrome.send('resetOnLearnMore');
+        self.send(login.Screen.CALLBACK_USER_ACTED,
+                  USER_ACTION_LEARN_MORE_PRESSED);
       });
+
+      this.context.addObserver(
+          CONTEXT_KEY_SCREEN_STATE,
+          function(state) {
+            if (state == self.RESET_SCREEN_STATE.RESTART_REQUIRED)
+              self.ui_state = self.RESET_SCREEN_UI_STATE.RESTART_REQUIRED;
+            if (state == self.RESET_SCREEN_STATE.REVERT_PROMISE)
+              self.ui_state = self.RESET_SCREEN_UI_STATE.REVERT_PROMISE;
+            else if (state == self.RESET_SCREEN_STATE.POWERWASH_PROPOSAL)
+              self.ui_state = self.RESET_SCREEN_UI_STATE.POWERWASH_PROPOSAL;
+            self.setDialogView_();
+            if (state == self.RESET_SCREEN_STATE.REVERT_PROMISE) {
+              announceAccessibleMessage(
+                loadTimeData.getString('resetRevertSpinnerMessage'));
+            }
+          }
+      );
+
+      this.context.addObserver(
+          CONTEXT_KEY_IS_OFFICIAL_BUILD,
+          function(isOfficial) {
+            $('powerwash-help-link').setAttribute('hidden', !isOfficial);
+          }
+      );
+      this.context.addObserver(
+          CONTEXT_KEY_ROLLBACK_CHECKED,
+          function(rollbackChecked) {
+            self.setRollbackOptionView();
+          }
+      );
+      this.context.addObserver(
+          CONTEXT_KEY_ROLLBACK_AVAILABLE,
+          function(rollbackAvailable) {
+            self.setRollbackOptionView();
+          }
+      );
     },
 
     /**
      * Header text of the screen.
      * @type {string}
      */
     get header() {
       return loadTimeData.getString('resetScreenTitle');
     },
 
     /**
      * Buttons in oobe wizard's button strip.
      * @type {array} Array of Buttons.
      */
     get buttons() {
+      var self = this;
       var buttons = [];
       var restartButton = this.ownerDocument.createElement('button');
       restartButton.id = 'reset-restart-button';
       restartButton.textContent = loadTimeData.getString('resetButtonRestart');
       restartButton.addEventListener('click', function(e) {

[dzhioev (left Google), 2015/02/11 12:38:29]

Use declareUserAction

[merkulova, 2015/02/11 15:07:17]

Done.

-        chrome.send('restartOnReset');
+        self.send(login.Screen.CALLBACK_USER_ACTED,
+                  USER_ACTION_RESTART_PRESSED);
         e.stopPropagation();
       });
       buttons.push(restartButton);
 
       // Button that leads to confirmation pop-up dialog.
       var toConfirmButton = this.ownerDocument.createElement('button');
       toConfirmButton.id = 'reset-toconfirm-button';
       toConfirmButton.textContent =
           loadTimeData.getString('resetButtonPowerwash');
       toConfirmButton.addEventListener('click', function(e) {
         // change view to confirmational
         reset.ConfirmResetOverlay.getInstance().initializePage();
 
-        var resetScreen = $('reset');
-        resetScreen.isConfirmational = true;
-        chrome.send('showConfirmationOnReset');
+        self.context.set(CONTEXT_KEY_IS_CONFIRMATIONAL_VIEW, true);

[dzhioev (left Google), 2015/02/11 12:38:29]

This should be done on C++ side as a reaction on USER_ACTION_SHOW_CONFIRMATION
action.

[merkulova, 2015/02/11 15:07:17]

Done.

[dzhioev (left Google), 2015/02/12 12:51:58]

Nothing has changed.

[merkulova, 2015/02/12 13:37:37]

Sorry, missed the change.

+        self.commitContextChanges();
+        self.send(login.Screen.CALLBACK_USER_ACTED,
+                  USER_ACTION_SHOW_CONFIRMATION);
         e.stopPropagation();
       });
       buttons.push(toConfirmButton);
 
       var cancelButton = this.ownerDocument.createElement('button');
       cancelButton.id = 'reset-cancel-button';
       cancelButton.textContent = loadTimeData.getString('cancelButton');

[dzhioev (left Google), 2015/02/11 12:38:29]

Use declareUserAction

[merkulova, 2015/02/11 15:07:17]

Done.

       cancelButton.addEventListener('click', function(e) {
-        chrome.send('cancelOnReset');
+        self.send(login.Screen.CALLBACK_USER_ACTED, USER_ACTION_CANCEL_RESET);
         e.stopPropagation();
       });
       buttons.push(cancelButton);
 
       return buttons;
     },
 
     /**
      * Returns a control which should receive an initial focus.
      */
     get defaultControl() {
       // choose
-      if (this.needRestart)
+      if (this.context.get(CONTEXT_KEY_SCREEN_STATE,
+                           this.RESET_SCREEN_STATE.RESTART_REQUIRED) ==
+          this.RESET_SCREEN_STATE.RESTART_REQUIRED)
         return $('reset-restart-button');
-      if (this.isConfirmational)
+      if (this.context.get(CONTEXT_KEY_IS_CONFIRMATIONAL_VIEW, false))
         return $('reset-confirm-commit');
       return $('reset-toconfirm-button');
     },
 
     /**
      * Cancels the reset and drops the user back to the login screen.
      */
     cancel: function() {
       if (this.isConfirmational) {
         reset.ConfirmResetOverlay.getInstance().handleDismiss_();
         return;
       }
-      chrome.send('cancelOnReset');
+      this.send(login.Screen.CALLBACK_USER_ACTED, USER_ACTION_CANCEL_RESET);
     },
 
     /**
      * Event handler that is invoked just before the screen in shown.
      * @param {Object} data Screen init payload.
      */
     onBeforeShow: function(data) {
-      if (data === undefined)
-        return;
-
-      this.rollbackChecked = false;
-      this.rollbackAvailable = false;
-      this.isConfirmational = false;
-      this.hasLearnMoreLink = false;
-
-      if (!('isOfficialBuild' in data && data['isOfficialBuild']))
-        $('powerwash-help-link').setAttribute('hidden', true);
-
-      if ('rollbackAvailable' in data)
-        this.rollbackAvailable = data['rollbackAvailable'];
-
-      if ('restartRequired' in data && data['restartRequired']) {
-        this.restartRequired = true;
-        this.setDialogView_(this.RESET_SCREEN_UI_STATE.RESTART_REQUIRED);
-      } else {
-        this.restartRequired = false;
-        this.setDialogView_(this.RESET_SCREEN_UI_STATE.POWERWASH_PROPOSAL);
-      }
     },
 
     /**
       * Sets css style for corresponding state of the screen.
-      * @param {string} state.
       * @private
       */
     setDialogView_: function(state) {
+      state = this.ui_state;
       var resetOverlay = $('reset-confirm-overlay');
-      this.classList.remove('revert-promise-view');
-      this.classList.remove('restart-required-view');
-      this.classList.remove('powerwash-proposal-view');
-      this.classList.remove('rollback-proposal-view');
-      resetOverlay.classList.remove('powerwash-proposal-view');
-      resetOverlay.classList.remove('rollback-proposal-view');
-      if (state == this.RESET_SCREEN_UI_STATE.REVERT_PROMISE) {
-        this.classList.add('revert-promise-view');
-      } else if (state == this.RESET_SCREEN_UI_STATE.RESTART_REQUIRED) {
-        this.classList.add('restart-required-view');
-      } else if (state == this.RESET_SCREEN_UI_STATE.POWERWASH_PROPOSAL) {
-        this.classList.add('powerwash-proposal-view');
-        resetOverlay.classList.add('powerwash-proposal-view');
-      } else if (state == this.RESET_SCREEN_UI_STATE.ROLLBACK_PROPOSAL) {
-        this.classList.add('rollback-proposal-view');
-        resetOverlay.classList.add('rollback-proposal-view');
-      } else { // error
-        console.error('State ' + state + ' is not supported by setDialogView.');
-      }
+      this.classList.toggle(
+          'revert-promise-view',
+          state == this.RESET_SCREEN_UI_STATE.REVERT_PROMISE);
+      this.classList.toggle(
+          'restart-required-view',
+          state == this.RESET_SCREEN_UI_STATE.RESTART_REQUIRED);
+      this.classList.toggle(
+          'powerwash-proposal-view',
+          state == this.RESET_SCREEN_UI_STATE.POWERWASH_PROPOSAL);
+      resetOverlay.classList.toggle(
+          'powerwash-proposal-view',
+          state == this.RESET_SCREEN_UI_STATE.POWERWASH_PROPOSAL);
+      this.classList.toggle(
+          'rollback-proposal-view',
+          state == this.RESET_SCREEN_UI_STATE.ROLLBACK_PROPOSAL);
+      resetOverlay.classList.toggle(
+          'rollback-proposal-view',
+          state == this.RESET_SCREEN_UI_STATE.ROLLBACK_PROPOSAL);
     },
 
-    updateViewOnRollbackCall: function() {
-      this.setDialogView_(this.RESET_SCREEN_UI_STATE.REVERT_PROMISE);
-      announceAccessibleMessage(
-          loadTimeData.getString('resetRevertSpinnerMessage'));
-    },
-
-    showRollbackOption: function() {
-      if (this.rollbackChecked || this.isConfirmational)
+    setRollbackOptionView: function() {
+      if (this.context.get(CONTEXT_KEY_IS_CONFIRMATIONAL_VIEW, false))
         return;
-      $('reset-toconfirm-button').textContent = loadTimeData.getString(
-          'resetButtonPowerwashAndRollback');
-      this.setDialogView_(this.RESET_SCREEN_UI_STATE.ROLLBACK_PROPOSAL);
-      this.rollbackChecked = true;
-    },
-
-    hideRollbackOption: function() {
-      if (!this.rollbackChecked || this.isConfirmational)
+      if (this.context.get(CONTEXT_KEY_SCREEN_STATE) !=
+          this.RESET_SCREEN_STATE.POWERWASH_PROPOSAL)
         return;
 
-      $('reset-toconfirm-button').textContent = loadTimeData.getString(
-          'resetButtonPowerwash');
-      this.setDialogView_(this.RESET_SCREEN_UI_STATE.POWERWASH_PROPOSAL);
-      this.rollbackChecked = false;
+      if (this.context.get(CONTEXT_KEY_ROLLBACK_AVAILABLE, false) &&
+          this.context.get(CONTEXT_KEY_ROLLBACK_CHECKED, false)) {
+        // show rollback option
+        $('reset-toconfirm-button').textContent = loadTimeData.getString(
+            'resetButtonPowerwashAndRollback');
+        this.ui_state = this.RESET_SCREEN_UI_STATE.ROLLBACK_PROPOSAL;
+      } else {
+        // hide rollback option
+        $('reset-toconfirm-button').textContent = loadTimeData.getString(
+            'resetButtonPowerwash');
+        this.ui_state = this.RESET_SCREEN_UI_STATE.POWERWASH_PROPOSAL;
+      }
+      this.setDialogView_();
     }
   };
 });