SetupWizard: Restore last page on setup wizard death.

Since the restore process (or any external setup wizard
  process) can take a long time to finish execution, save
  the current page and restore it on recreation when necessary.

Change-Id: I575cf58047eb307c95408a0955dd7e5b50a62107
TICKET: CYNGNOS-2233

src/com/cyanogenmod/setupwizard/setup/AbstractSetupData.java

@@ -135,6 +135,21 @@ public abstract class AbstractSetupData extends BroadcastReceiver implements Set
         doPreviousNext(runnable);
     }
 
+    @Override
+    public void setCurrentPage(String key) {
+        if (mPageList.getPage(key) != null) {
+            mCurrentPageIndex = mPageList.getPageIndex(key);
+        }
+    }
+
+    public Page getNextPage(String key) {
+        if (mPageList.getPage(key) != null) {
+            int currentPageIndex = mPageList.getPageIndex(key);
+            return mPageList.getPage(currentPageIndex + 1);
+        }
+        return null;
+    }
+
     private boolean advanceToNextUnhidden() {
         while (mCurrentPageIndex < mPageList.size()) {
             mCurrentPageIndex++;

src/com/cyanogenmod/setupwizard/setup/PageList.java

@@ -16,6 +16,8 @@
 
 package com.cyanogenmod.setupwizard.setup;
 
+import android.text.TextUtils;
+
 import java.util.LinkedHashMap;
 
 public class PageList extends LinkedHashMap<String, Page> {
@@ -30,6 +32,17 @@ public class PageList extends LinkedHashMap<String, Page> {
         return get(key);
     }
 
+    public int getPageIndex(String key) {
+        int i=0;
+        for (Page page : values()) {
+            if (TextUtils.equals(page.getKey(), key)) {
+                return i;
+            }
+            i++;
+        }
+        return i;
+    }
+
     public Page getPage(int index) {
         int i=0;
         for (Page page : values()) {

src/com/cyanogenmod/setupwizard/setup/SetupDataCallbacks.java

@@ -26,5 +26,6 @@ public interface SetupDataCallbacks {
     boolean isCurrentPage(Page page);
     Page getPage(String key);
     Page getPage(int key);
+    void setCurrentPage(String key);
     void addFinishRunnable(Runnable runnable);
 }

src/com/cyanogenmod/setupwizard/ui/SetupWizardActivity.java

@@ -20,6 +20,7 @@ import android.animation.Animator;
 import android.app.Activity;
 import android.app.WallpaperManager;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.content.pm.ActivityInfo;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
@@ -28,7 +29,9 @@ import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.UserHandle;
+import android.preference.PreferenceManager;
 import android.provider.Settings;
+import android.text.TextUtils;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewAnimationUtils;
@@ -42,6 +45,7 @@ import com.cyanogenmod.setupwizard.R;
 import com.cyanogenmod.setupwizard.SetupWizardApp;
 import com.cyanogenmod.setupwizard.cmstats.SetupStats;
 import com.cyanogenmod.setupwizard.setup.CMSetupWizardData;
+import com.cyanogenmod.setupwizard.setup.GmsAccountPage;
 import com.cyanogenmod.setupwizard.setup.Page;
 import com.cyanogenmod.setupwizard.setup.SetupDataCallbacks;
 import com.cyanogenmod.setupwizard.util.EnableAccessibilityController;
@@ -56,6 +60,7 @@ public class SetupWizardActivity extends Activity implements SetupDataCallbacks,
         ThemeManager.ThemeChangeListener {
 
     private static final String TAG = SetupWizardActivity.class.getSimpleName();
+    private static final String KEY_LAST_PAGE_TAG = "last_page_tag";
 
     private static final int UI_FLAGS = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
             | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
@@ -143,6 +148,27 @@ public class SetupWizardActivity extends Activity implements SetupDataCallbacks,
         if (savedInstanceState != null && savedInstanceState.containsKey("data")) {
             mSetupData.load(savedInstanceState.getBundle("data"));
         }
+
+        final SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        if (sharedPreferences.contains(KEY_LAST_PAGE_TAG)) {
+            final String lastPage = sharedPreferences.getString(KEY_LAST_PAGE_TAG,
+                    mSetupData.getCurrentPage().getKey());
+            final boolean backupEnabled = (Settings.Secure.getInt(getContentResolver(),
+                    Settings.Secure.BACKUP_AUTO_RESTORE, 0) == 1) ||
+                    (Settings.Secure.getInt(getContentResolver(),
+                            Settings.Secure.BACKUP_ENABLED, 0) == 1);
+            if (TextUtils.equals(lastPage, GmsAccountPage.TAG) && backupEnabled) {
+                // We probably already restored, skip ahead!
+                mSetupData.setCurrentPage(mSetupData.getNextPage(lastPage).getKey());
+            } else {
+                // else just restore
+                mSetupData.setCurrentPage(sharedPreferences.getString(KEY_LAST_PAGE_TAG,
+                        mSetupData.getCurrentPage().getKey()));
+            }
+            Page page = mSetupData.getCurrentPage();
+            page.doLoadAction(getFragmentManager(), Page.ACTION_NEXT);
+        }
+
         mEnableAccessibilityController =
                 EnableAccessibilityController.getInstance(getApplicationContext());
         mRootView.setOnTouchListener(new View.OnTouchListener() {
@@ -190,6 +216,8 @@ public class SetupWizardActivity extends Activity implements SetupDataCallbacks,
     protected void onDestroy() {
         super.onDestroy();
         if (mSetupData != null) {
+            final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
+            prefs.edit().putString(KEY_LAST_PAGE_TAG, mSetupData.getCurrentPage().getKey()).apply();
             mSetupData.onDestroy();
             mSetupData.unregisterListener(this);
             unregisterReceiver(mSetupData);
@@ -230,6 +258,14 @@ public class SetupWizardActivity extends Activity implements SetupDataCallbacks,
         }
     }
 
+    @Override
+    public void setCurrentPage(String key) {
+        Page page = mSetupData.getCurrentPage();
+        if (!isFinishing()) {
+            page.doLoadAction(getFragmentManager(), Page.ACTION_NEXT);
+        }
+    }
+
     @Override
     public void onPageLoaded(Page page) {
         updateButtonBar();