[gnome-shell/wip/smartcard: 9/16] authPrompt: add support for auth without username

[Ray Strode <halfline src gnome org>]

commit b14f3f434ae051aac52505862e17928fd5ece420
Author: Ray Strode <rstrode redhat com>
Date:   Sun Jul 28 17:49:50 2013 -0400

    authPrompt: add support for auth without username
    
    This commit introduces a new BeginRequestType enum which gets
    passed to the 'call-begin-when-ready' signal to specify whether
    a username should be provided to the begin() method and changes
    the loginDialog to comply.
    
    Currently, the signal only ever gets emitted with
    
    AuthPrompt.BeginRequestType.PROVIDE_USERNAME
    
    but that will change in the future when providing smartcard
    support.

 js/gdm/authPrompt.js  |    7 ++++++-
 js/gdm/loginDialog.js |   32 +++++++++++++++++++++++---------
 js/ui/unlockDialog.js |   16 ++++++++++++++--
 3 files changed, 43 insertions(+), 12 deletions(-)
---
diff --git a/js/gdm/authPrompt.js b/js/gdm/authPrompt.js
index 1c6719e..5456ee9 100644
--- a/js/gdm/authPrompt.js
+++ b/js/gdm/authPrompt.js
@@ -31,6 +31,11 @@ const AuthPromptStatus = {
     VERIFICATION_SUCCEEDED: 3
 };
 
+const BeginRequestType = {
+    PROVIDE_USERNAME: 0,
+    DONT_PROVIDE_USERNAME: 1
+};
+
 const AuthPrompt = new Lang.Class({
     Name: 'AuthPrompt',
 
@@ -423,7 +428,7 @@ const AuthPrompt = new Lang.Class({
         if (oldStatus == AuthPromptStatus.VERIFICATION_FAILED)
             this.emit('failed');
 
-        this.emit('reset');
+        this.emit('reset', BeginRequestType.PROVIDE_USERNAME);
     },
 
     addCharacter: function(unichar) {
diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index 618c195..e662719 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -478,7 +478,7 @@ const LoginDialog = new Lang.Class({
         this._notListedButton.connect('clicked',
                                       Lang.bind(this, function() {
             this._authPrompt.cancelButton.show();
-            this._hideUserListAndLogIn();
+            this._hideUserListAskForUsernameAndBeginVerification();
         }));
 
         this._notListedButton.hide();
@@ -577,16 +577,21 @@ const LoginDialog = new Lang.Class({
         this._showPrompt();
     },
 
-    _onReset: function() {
+    _onReset: function(authPrompt, beginRequest) {
         this._sessionMenuButton.updateSensitivity(true);
 
         this._user = null;
 
-        if (this._disableUserList) {
-            this._authPrompt.cancelButton.hide();
-            this._hideUserListAndLogIn();
+        if (beginRequest == AuthPrompt.BeginRequestType.PROVIDE_USERNAME) {
+            if (this._disableUserList) {
+                this._authPrompt.cancelButton.hide();
+                this._hideUserListAskForUsernameAndBeginVerification();
+            } else {
+                this._showUserList();
+            }
         } else {
-            this._showUserList();
+            this._authPrompt.cancelButton.hide();
+            this._hideUserListAndBeginVerification();
         }
     },
 
@@ -631,7 +636,7 @@ const LoginDialog = new Lang.Class({
         this._authPrompt.setHint(_("(e.g., user or %s)").format(hint));
     },
 
-    _askForUsernameAndLogIn: function() {
+    _askForUsernameAndBeginVerification: function() {
         this._authPrompt.setPasswordChar('');
         this._authPrompt.setQuestion(_("Username: "));
 
@@ -814,11 +819,20 @@ const LoginDialog = new Lang.Class({
         this._userSelectionBox.visible = expanded;
     },
 
-    _hideUserListAndLogIn: function() {
+    _hideUserList: function() {
         this._setUserListExpanded(false);
         if (this._userSelectionBox.visible)
             GdmUtil.cloneAndFadeOutActor(this._userSelectionBox);
-        this._askForUsernameAndLogIn();
+    },
+
+    _hideUserListAskForUsernameAndBeginVerification: function() {
+        this._hideUserList();
+        this._askForUsernameAndBeginVerification();
+    },
+
+    _hideUserListAndBeginVerification: function() {
+        this._hideUserList();
+        this._authPrompt.begin();
     },
 
     _showUserList: function() {
diff --git a/js/ui/unlockDialog.js b/js/ui/unlockDialog.js
index 8f30d6e..13a2bd4 100644
--- a/js/ui/unlockDialog.js
+++ b/js/ui/unlockDialog.js
@@ -51,7 +51,7 @@ const UnlockDialog = new Lang.Class({
         this._authPrompt = new AuthPrompt.AuthPrompt(new Gdm.Client(), 
AuthPrompt.AuthPromptMode.UNLOCK_ONLY);
         this._authPrompt.connect('failed', Lang.bind(this, this._fail));
         this._authPrompt.connect('cancelled', Lang.bind(this, this._fail));
-        this._authPrompt.setUser(this._user);
+        this._authPrompt.connect('reset', Lang.bind(this, this._onReset));
         this._authPrompt.setPasswordChar('\u25cf');
         this._authPrompt.nextButton.label = _("Unlock");
 
@@ -75,7 +75,7 @@ const UnlockDialog = new Lang.Class({
             this._otherUserButton = null;
         }
 
-        this._authPrompt.begin({ userName: this._userName });
+        this._authPrompt.reset();
         this._updateSensitivity(true);
 
         Main.ctrlAltTabManager.addGroup(this.actor, _("Unlock Window"), 'dialog-password-symbolic');
@@ -97,6 +97,18 @@ const UnlockDialog = new Lang.Class({
         this.emit('failed');
     },
 
+    _onReset: function(authPrompt, beginRequest) {
+        let userName;
+        if (beginRequest == AuthPrompt.BeginRequestType.PROVIDE_USERNAME) {
+            this._authPrompt.setUser(this._user);
+            userName = this._userName;
+        } else {
+            userName = null;
+        }
+
+        this._authPrompt.begin({ userName: userName });
+    },
+
     _escape: function() {
         if (this.allowCancel)
             this._authPrompt.cancel();