From 467813fba07c4dcc4ce350a3d4576f5739c5c940 Mon Sep 17 00:00:00 2001
From: Mathew Inwood <mathewi@google.com>
Date: Fri, 2 Sep 2011 15:43:17 +0100
Subject: More fine-grained config for 'Search result preloading' setting.

Instead of a checkbox, it's now a setting always/wifi only/never.

Bug: 5086576
Change-Id: I265a22968eafee547571dc86c10c5d5421a305e8
---
 res/values/strings.xml                             | 17 ++++++++
 res/xml/bandwidth_preferences.xml                  |  9 ++--
 src/com/android/browser/BrowserSettings.java       | 17 +++++++-
 src/com/android/browser/PreferenceKeys.java        |  2 +-
 .../android/browser/PreloadRequestReceiver.java    | 50 ++++++++++++++++++++--
 5 files changed, 85 insertions(+), 10 deletions(-)

diff --git a/res/values/strings.xml b/res/values/strings.xml
index 123e5c8..77e25a3 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -646,8 +646,25 @@
     <string name="pref_data_title">Bandwidth Management</string>
     <!-- Title for search preloading [CHAR LIMIT=40] -->
     <string name="pref_data_preload_title">Search result preloading</string>
+    <!-- Search preloading options [CHAR LIMIT=20] -->
+    <string-array name="pref_data_preload_choices">
+        <item>Never</item>
+        <item>Only on Wi-Fi</item>
+        <item>Always</item>
+    </string-array>
+    <!-- Do not translate -->
+    <string name="pref_data_preload_value_never" translatable="false">NEVER</string>
+    <string name="pref_data_preload_value_wifi_only" translatable="false">WIFI_ONLY</string>
+    <string name="pref_data_preload_value_always" translatable="false">ALWAYS</string>
+    <string-array name="pref_data_preload_values" translatable="false">
+        <item><xliff:g>@string/pref_data_preload_value_never</xliff:g></item>
+        <item><xliff:g>@string/pref_data_preload_value_wifi_only</xliff:g></item>
+        <item><xliff:g>@string/pref_data_preload_value_always</xliff:g></item>
+    </string-array>
     <!-- Summary for search preloading [CHAR LIMIT=80] -->
     <string name="pref_data_preload_summary">Allow the browser to preload high confidence search results in the background</string>
+    <!-- Title of dialog for search preloading [CHAR LIMIT=40] -->
+    <string name="pref_data_preload_dialogtitle">Search result preloading</string>
     <!-- Title for a dialog displayed when the browser has a data connectivity
             problem -->
     <string name="browserFrameNetworkErrorLabel">Data connectivity problem</string>
diff --git a/res/xml/bandwidth_preferences.xml b/res/xml/bandwidth_preferences.xml
index 0767ac5..8a31304 100644
--- a/res/xml/bandwidth_preferences.xml
+++ b/res/xml/bandwidth_preferences.xml
@@ -16,11 +16,14 @@
 
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <CheckBoxPreference
-        android:key="preload_enabled"
+    <ListPreference
+        android:key="preload_when"
         android:title="@string/pref_data_preload_title"
         android:summary="@string/pref_data_preload_summary"
-        android:defaultValue="false" />
+        android:defaultValue="@string/pref_data_preload_value_wifi_only"
+        android:entries="@array/pref_data_preload_choices"
+        android:entryValues="@array/pref_data_preload_values"
+        android:dialogTitle="@string/pref_data_preload_dialogtitle" />
 
     <CheckBoxPreference
         android:key="load_images"
diff --git a/src/com/android/browser/BrowserSettings.java b/src/com/android/browser/BrowserSettings.java
index 11316ff..ce8a9c1 100644
--- a/src/com/android/browser/BrowserSettings.java
+++ b/src/com/android/browser/BrowserSettings.java
@@ -780,7 +780,20 @@ public class BrowserSettings implements OnSharedPreferenceChangeListener,
     // getter/setters for bandwidth_preferences.xml
     // -----------------------------
 
-    public boolean isPreloadEnabled() {
-        return mPrefs.getBoolean(PREF_DATA_PRELOAD, false);
+    public static String getPreloadOnWifiOnlyPreferenceString(Context context) {
+        return context.getResources().getString(R.string.pref_data_preload_value_wifi_only);
     }
+
+    public static String getPreloadAlwaysPreferenceString(Context context) {
+        return context.getResources().getString(R.string.pref_data_preload_value_always);
+    }
+
+    private String getDefaultPreloadSetting() {
+        return getPreloadOnWifiOnlyPreferenceString(mContext);
+    }
+
+    public String getPreloadEnabled() {
+        return mPrefs.getString(PREF_DATA_PRELOAD, getDefaultPreloadSetting());
+    }
+
 }
diff --git a/src/com/android/browser/PreferenceKeys.java b/src/com/android/browser/PreferenceKeys.java
index 1bfe389..f3da937 100644
--- a/src/com/android/browser/PreferenceKeys.java
+++ b/src/com/android/browser/PreferenceKeys.java
@@ -100,7 +100,7 @@ public interface PreferenceKeys {
     // ----------------------
     // Keys for bandwidth_preferences.xml
     // ----------------------
-    static final String PREF_DATA_PRELOAD = "preload_enabled";
+    static final String PREF_DATA_PRELOAD = "preload_when";
     static final String PREF_LOAD_IMAGES = "load_images";
 
 }
diff --git a/src/com/android/browser/PreloadRequestReceiver.java b/src/com/android/browser/PreloadRequestReceiver.java
index ff3c8e3..c654037 100644
--- a/src/com/android/browser/PreloadRequestReceiver.java
+++ b/src/com/android/browser/PreloadRequestReceiver.java
@@ -18,9 +18,9 @@ package com.android.browser;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
 import android.os.Bundle;
-import android.preference.PreferenceManager;
 import android.provider.Browser;
 import android.util.Log;
 
@@ -42,15 +42,57 @@ public class PreloadRequestReceiver extends BroadcastReceiver {
     static final String EXTRA_SEARCHBOX_CANCEL = "searchbox_cancel";
     static final String EXTRA_SEARCHBOX_SETQUERY = "searchbox_query";
 
+    private ConnectivityManager mConnectivityManager;
+
     @Override
     public void onReceive(Context context, Intent intent) {
         if (LOGD_ENABLED) Log.d(LOGTAG, "received intent " + intent);
-        if (BrowserSettings.getInstance().isPreloadEnabled()
-                && intent.getAction().equals(ACTION_PRELOAD)) {
+        if (isPreloadEnabledOnCurrentNetwork(context) &&
+                intent.getAction().equals(ACTION_PRELOAD)) {
             handlePreload(context, intent);
         }
     }
 
+    private boolean isPreloadEnabledOnCurrentNetwork(Context context) {
+        String preload = BrowserSettings.getInstance().getPreloadEnabled();
+        if (LOGD_ENABLED) Log.d(LOGTAG, "Preload setting: " + preload);
+        if (BrowserSettings.getPreloadAlwaysPreferenceString(context).equals(preload)) {
+            return true;
+        } else if (BrowserSettings.getPreloadOnWifiOnlyPreferenceString(context).equals(preload)) {
+            boolean onWifi = isOnWifi(context);
+            if (LOGD_ENABLED) Log.d(LOGTAG, "on wifi:" + onWifi);
+            return onWifi;
+        } else {
+            return false;
+        }
+    }
+
+    private boolean isOnWifi(Context context) {
+        if (mConnectivityManager == null) {
+            mConnectivityManager = (ConnectivityManager)
+                    context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        }
+        NetworkInfo ni = mConnectivityManager.getActiveNetworkInfo();
+        if (ni == null) {
+            return false;
+        }
+        switch (ni.getType()) {
+            case ConnectivityManager.TYPE_MOBILE:
+            case ConnectivityManager.TYPE_MOBILE_DUN:
+            case ConnectivityManager.TYPE_MOBILE_MMS:
+            case ConnectivityManager.TYPE_MOBILE_SUPL:
+            case ConnectivityManager.TYPE_MOBILE_HIPRI:
+            case ConnectivityManager.TYPE_WIMAX: // separate case for this?
+                return false;
+            case ConnectivityManager.TYPE_WIFI:
+            case ConnectivityManager.TYPE_ETHERNET:
+            case ConnectivityManager.TYPE_BLUETOOTH:
+                return true;
+            default:
+                return false;
+        }
+    }
+
     private void handlePreload(Context context, Intent i) {
         String url = UrlUtils.smartUrlFilter(i.getData());
         String id = i.getStringExtra(EXTRA_PRELOAD_ID);
-- 
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