From 919e59044b5c6a3d3947af05ddf241f51f65def4 Mon Sep 17 00:00:00 2001
From: Marc Blank <mblank@google.com>
Date: Wed, 21 Dec 2011 14:33:15 -0800
Subject: [PATCH] Handle UI part of enforcing email lookback limit

Bug: 5792217
Change-Id: I4351ae4d8505965a32690ecb5e6338765fb3770f
---
 res/values/strings.xml                        |  4 ++
 .../setup/AccountSettingsFragment.java        |  9 +++-
 .../activity/setup/AccountSetupOptions.java   | 19 +++++++-
 .../email/activity/setup/MailboxSettings.java | 46 ++++++++++++++++---
 4 files changed, 67 insertions(+), 11 deletions(-)

diff --git a/res/values/strings.xml b/res/values/strings.xml
index 954982114..67fcb3dd6 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -1262,6 +1262,10 @@ as <xliff:g id="filename">%s</xliff:g>.</string>
     <!-- A policy requiring a maximum amount of time the device can sit idle before the lock screen
         is activated [CHAR LIMIT=50] -->
     <string name="policy_screen_timeout">Require an idle device to lock its screen</string>
+    <!-- A policy limiting the number of old calendar events synced [CHAR LIMIT=50] -->
+    <string name="policy_calendar_age">Limit the number of calendar events synced</string>
+    <!-- A policy limiting the number of emails synced [CHAR LIMIT=50] -->
+    <string name="policy_email_age">Limit the number of emails synced</string>
 
     <!-- The four strings below represent "quick responses" which the user can insert into a
         message being composed with just a couple of taps.  These four responses MUST be defined,
diff --git a/src/com/android/email/activity/setup/AccountSettingsFragment.java b/src/com/android/email/activity/setup/AccountSettingsFragment.java
index 1722d186e..030595640 100644
--- a/src/com/android/email/activity/setup/AccountSettingsFragment.java
+++ b/src/com/android/email/activity/setup/AccountSettingsFragment.java
@@ -443,6 +443,12 @@ public class AccountSettingsFragment extends EmailPreferenceFragment
         if (policy.mDontAllowCamera) {
             policies.add(res.getString(R.string.policy_dont_allow_camera));
         }
+        if (policy.mMaxEmailLookback != 0) {
+            policies.add(res.getString(R.string.policy_email_age));
+        }
+        if (policy.mMaxCalendarLookback != 0) {
+            policies.add(res.getString(R.string.policy_calendar_age));
+        }
         return policies;
     }
 
@@ -517,10 +523,9 @@ public class AccountSettingsFragment extends EmailPreferenceFragment
         if (HostAuth.SCHEME_EAS.equals(protocol)) {
             mSyncWindow = new ListPreference(mContext);
             mSyncWindow.setTitle(R.string.account_setup_options_mail_window_label);
-            mSyncWindow.setEntries(R.array.account_settings_mail_window_entries);
-            mSyncWindow.setEntryValues(R.array.account_settings_mail_window_values);
             mSyncWindow.setValue(String.valueOf(mAccount.getSyncLookback()));
             mSyncWindow.setSummary(mSyncWindow.getEntry());
+            MailboxSettings.setupLookbackPreferenceOptions(mContext, mSyncWindow, mAccount);
 
             // Must correspond to the hole in the XML file that's reserved.
             mSyncWindow.setOrder(2);
diff --git a/src/com/android/email/activity/setup/AccountSetupOptions.java b/src/com/android/email/activity/setup/AccountSetupOptions.java
index c942faa87..1a246c9f5 100644
--- a/src/com/android/email/activity/setup/AccountSetupOptions.java
+++ b/src/com/android/email/activity/setup/AccountSetupOptions.java
@@ -44,6 +44,7 @@ import com.android.email.service.MailService;
 import com.android.emailcommon.Logging;
 import com.android.emailcommon.provider.Account;
 import com.android.emailcommon.provider.HostAuth;
+import com.android.emailcommon.provider.Policy;
 import com.android.emailcommon.service.SyncWindow;
 import com.android.emailcommon.utility.Utility;
 
@@ -389,10 +390,24 @@ public class AccountSetupOptions extends AccountSetupActivity implements OnClick
         CharSequence[] windowEntries = getResources().getTextArray(
                 R.array.account_settings_mail_window_entries);
 
+        // Find a proper maximum for email lookback, based on policy (if we have one)
+        int maxEntry = windowEntries.length;
+        Policy policy = SetupData.getAccount().mPolicy;
+        if (policy != null) {
+            int maxLookback = policy.mMaxEmailLookback;
+            if (maxLookback != 0) {
+                // Offset/Code   0      1      2      3      4        5
+                // Entries      auto, 1 day, 3 day, 1 week, 2 week, 1 month
+                // Lookback     N/A   1 day, 3 day, 1 week, 2 week, 1 month
+                // Since our test below is i < maxEntry, we must set maxEntry to maxLookback + 1
+                maxEntry = maxLookback + 1;
+            }
+        }
+
         // Now create the array used by the Spinner
-        SpinnerOption[] windowOptions = new SpinnerOption[windowEntries.length];
+        SpinnerOption[] windowOptions = new SpinnerOption[maxEntry];
         int defaultIndex = -1;
-        for (int i = 0; i < windowEntries.length; i++) {
+        for (int i = 0; i < maxEntry; i++) {
             final int value = Integer.valueOf(windowValues[i].toString());
             windowOptions[i] = new SpinnerOption(value, windowEntries[i].toString());
             if (value == SYNC_WINDOW_EAS_DEFAULT) {
diff --git a/src/com/android/email/activity/setup/MailboxSettings.java b/src/com/android/email/activity/setup/MailboxSettings.java
index 2b0eb5851..ca17436f9 100644
--- a/src/com/android/email/activity/setup/MailboxSettings.java
+++ b/src/com/android/email/activity/setup/MailboxSettings.java
@@ -22,6 +22,7 @@ import android.content.ContentUris;
 import android.content.ContentValues;
 import android.content.Context;
 import android.content.Intent;
+import android.content.res.Resources;
 import android.net.Uri;
 import android.os.Bundle;
 import android.preference.ListPreference;
@@ -37,6 +38,7 @@ import com.android.email.R;
 import com.android.email.RefreshManager;
 import com.android.emailcommon.Logging;
 import com.android.emailcommon.provider.Account;
+import com.android.emailcommon.provider.Policy;
 import com.android.emailcommon.provider.EmailContent.AccountColumns;
 import com.android.emailcommon.provider.EmailContent.MailboxColumns;
 import com.android.emailcommon.provider.Mailbox;
@@ -177,6 +179,42 @@ public class MailboxSettings extends PreferenceActivity {
         }
     }
 
+    /**
+     * Setup the entries and entry values for the sync lookback preference
+     * @param context the caller's context
+     * @param pref a ListPreference to be set up
+     * @param account the Account (or owner of a Mailbox) whose preference is being set
+     */
+    public static void setupLookbackPreferenceOptions(Context context, ListPreference pref,
+            Account account) {
+        Resources resources = context.getResources();
+        // Load the complete list of entries/values
+        CharSequence[] entries =
+                resources.getTextArray(R.array.account_settings_mail_window_entries);
+        CharSequence[] values =
+                resources.getTextArray(R.array.account_settings_mail_window_values);
+        // If we have a maximum lookback policy, enforce it
+        if (account.mPolicyKey > 0) {
+            Policy policy = Policy.restorePolicyWithId(context, account.mPolicyKey);
+            if (policy != null && (policy.mMaxEmailLookback != 0)) {
+                int maxEntry  = policy.mMaxEmailLookback + 1;
+                // Copy the proper number of values into new entries/values array
+                CharSequence[] policyEntries = new CharSequence[maxEntry];
+                CharSequence[] policyValues = new CharSequence[maxEntry];
+                for (int i = 0; i < maxEntry; i++) {
+                    policyEntries[i] = entries[i];
+                    policyValues[i] = values[i];
+                }
+                // Point entries/values to the new arrays
+                entries = policyEntries;
+                values = policyValues;
+            }
+        }
+        // Set up the preference
+        pref.setEntries(entries);
+        pref.setEntryValues(values);
+    }
+
     /**
      * Called when {@link #mAccount} and {@link #mMailbox} are loaded (either by the async task
      * or from the saved state).
@@ -195,12 +233,7 @@ public class MailboxSettings extends PreferenceActivity {
             setTitle(getString(R.string.mailbox_settings_activity_title_with_mailbox, mailboxName));
         }
 
-
-        // Special case: If setting inbox, don't show "Use account's default".
-        if (mMailbox.mType == Mailbox.TYPE_INBOX) {
-            mSyncLookbackPref.setEntries(R.array.account_settings_mail_window_entries);
-            mSyncLookbackPref.setEntryValues(R.array.account_settings_mail_window_values);
-        }
+        setupLookbackPreferenceOptions(this, mSyncLookbackPref, mAccount);
 
         // Set default value & update summary
         mSyncIntervalPref.setValue(String.valueOf(getSyncInterval()));
@@ -210,7 +243,6 @@ public class MailboxSettings extends PreferenceActivity {
 
         // Make then enabled
         enablePreferences(true);
-
     }
 
     private void updatePreferenceSummary() {