Add new auto-login UI.

When the WebView notifies us of an auto-login request, check if the account is
valid.  If so, use it to log into the account manager.  If that fails or the
account is not valid, display the login UI.

Bug: 3367381
Change-Id: I5a164ef676921eec03a89860fa5be722d3d987d4

1 files changed, 165 insertions, 0 deletions

diff --git a/src/com/android/browser/DeviceAccountLogin.java b/src/com/android/browser/DeviceAccountLogin.java
new file mode 100644
index 0000000..50b8c97
--- /dev/null
+++ b/src/com/android/browser/DeviceAccountLogin.java
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.browser;
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.accounts.AccountManagerCallback;
+import android.accounts.AccountManagerFuture;
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+
+public class DeviceAccountLogin implements
+        AccountManagerCallback<Bundle>, DialogInterface.OnClickListener {
+
+    private final Activity mActivity;
+    private final WebView mWebView;
+    private final Tab mTab;
+    private final WebViewController mWebViewController;
+    private final AccountManager mAccountManager;
+    private Account[] mAccounts;
+    private int mCurrentAccount;
+    private AutoLoginCallback mCallback;
+    private String mAuthToken;
+
+    // Current state of the login.
+    private int mState = INITIAL;
+
+    public static final int INITIAL = 0;
+    public static final int FAILED = 1;
+    public static final int PROCESSING = 2;
+
+    public interface AutoLoginCallback {
+        public void setAccount(String account);
+        public void loginFailed();
+    }
+
+    public DeviceAccountLogin(Activity activity, WebView view, Tab tab,
+            WebViewController controller) {
+        mActivity = activity;
+        mWebView = view;
+        mTab = tab;
+        mWebViewController = controller;
+        mAccountManager = AccountManager.get(activity);
+    }
+
+    public void handleLogin(String realm, String account, String args) {
+        mAccounts = mAccountManager.getAccountsByType(realm);
+        mAuthToken = "weblogin:" + args;
+
+        // No need to display UI if there are no accounts.
+        if (mAccounts.length == 0) {
+            return;
+        }
+
+        // Verify the account before using it.
+        for (Account a : mAccounts) {
+            if (a.name.equals(account)) {
+                // Handle the automatic login case where the service gave us an
+                // account to use.
+                mAccountManager.getAuthToken(a, mAuthToken, null,
+                       mActivity, this, null);
+                return;
+            }
+        }
+
+        displayLoginUi();
+    }
+
+    @Override
+    public void run(AccountManagerFuture<Bundle> value) {
+        try {
+            String result = value.getResult().getString(
+                    AccountManager.KEY_AUTHTOKEN);
+            if (result == null) {
+                loginFailed();
+            } else {
+                mWebView.loadUrl(result);
+                mTab.setDeviceAccountLogin(null);
+                if (mTab.inForeground()) {
+                    mWebViewController.hideAutoLogin(mTab);
+                }
+            }
+        } catch (Exception e) {
+            loginFailed();
+        }
+    }
+
+    public int getState() {
+        return mState;
+    }
+
+    private void loginFailed() {
+        mState = FAILED;
+        if (mTab.getDeviceAccountLogin() == null) {
+            displayLoginUi();
+        } else {
+            assert mCallback != null;
+            mCallback.loginFailed();
+        }
+    }
+
+    private void displayLoginUi() {
+        // Display the account picker.
+        mTab.setDeviceAccountLogin(this);
+        if (mTab.inForeground()) {
+            mWebViewController.showAutoLogin(mTab);
+        }
+    }
+
+    public void cancel() {
+        mTab.setDeviceAccountLogin(null);
+    }
+
+    public void login(AutoLoginCallback cb) {
+        mState = PROCESSING;
+        mCallback = cb;
+        mAccountManager.getAuthToken(
+                mAccounts[mCurrentAccount], mAuthToken, null,
+                mActivity, this, null);
+    }
+
+    public void chooseAccount(AutoLoginCallback cb) {
+        mCallback = cb;
+        CharSequence[] names = new CharSequence[mAccounts.length];
+        int i = 0;
+        for (Account a : mAccounts) {
+            names[i++] = a.name;
+        }
+        new AlertDialog.Builder(mActivity)
+                .setTitle(R.string.pref_autologin_title)
+                .setSingleChoiceItems(names, mCurrentAccount, this)
+                .setCancelable(true)
+                .show();
+    }
+
+    public String getCurrentAccount() {
+        return mAccounts[mCurrentAccount].name;
+    }
+
+    @Override
+    public void onClick(DialogInterface d, int which) {
+        assert mCallback != null;
+        mCallback.setAccount(mAccounts[which].name);
+        mCurrentAccount = which;
+        d.dismiss();
+    }
+}