Adding search for dynamic accessibility settings.

The language and input settings are highly dynamic and this change adds search
support for that. This category depends on installed IMEs, input devices, user
dictionary configuration, etc. We not only compute the right preferences to be
indexed but also track related system state in the settings app to rebuild the
index if needed.

bug:14066763

Change-Id: Ia89d9e35bd79abf8d74614691aedf4ca9b11b6f2

1 files changed, 90 insertions, 7 deletions

diff --git a/src/com/android/settings/SettingsActivity.java b/src/com/android/settings/SettingsActivity.java
index 789ad2a..329e4bf 100644
--- a/src/com/android/settings/SettingsActivity.java
+++ b/src/com/android/settings/SettingsActivity.java
@@ -40,6 +40,9 @@ import android.content.pm.ResolveInfo;
 import android.content.res.Configuration;
 import android.content.res.TypedArray;
 import android.content.res.XmlResourceParser;
+import android.database.ContentObserver;
+import android.hardware.input.InputManager;
+import android.net.Uri;
 import android.nfc.NfcAdapter;
 import android.os.Bundle;
 import android.os.Handler;
@@ -57,7 +60,7 @@ import android.preference.PreferenceScreen;
 import android.print.PrintManager;
 import android.printservice.PrintService;
 import android.printservice.PrintServiceInfo;
-import android.provider.SearchIndexableData;
+import android.provider.UserDictionary;
 import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.Log;
@@ -69,6 +72,8 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.accessibility.AccessibilityManager;
+import android.view.inputmethod.InputMethodInfo;
+import android.view.inputmethod.InputMethodManager;
 import android.widget.Button;
 import android.widget.ListView;
 
@@ -119,7 +124,6 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashMap;
-import java.util.Iterator;
 import java.util.List;
 
 import static com.android.settings.dashboard.Header.HEADER_ID_UNDEFINED;
@@ -315,8 +319,8 @@ public class SettingsActivity extends Activity
         }
     };
 
-    private final DynamicIndexablePackageMonitor mDynamicIndexablePackageMonitor =
-            new DynamicIndexablePackageMonitor();
+    private final DynamicIndexableContentMonitor mDynamicIndexableContentMonitor =
+            new DynamicIndexableContentMonitor();
 
     private Button mNextButton;
     private ActionBar mActionBar;
@@ -625,7 +629,7 @@ public class SettingsActivity extends Activity
 
         registerReceiver(mBatteryInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
 
-        mDynamicIndexablePackageMonitor.register(this);
+        mDynamicIndexableContentMonitor.register(this);
     }
 
     @Override
@@ -641,7 +645,7 @@ public class SettingsActivity extends Activity
 
         mDevelopmentPreferencesListener = null;
 
-        mDynamicIndexablePackageMonitor.unregister();
+        mDynamicIndexableContentMonitor.unregister();
     }
 
     @Override
@@ -1290,13 +1294,18 @@ public class SettingsActivity extends Activity
         mSearchMenuItem.collapseActionView();
     }
 
-    private static final class DynamicIndexablePackageMonitor extends PackageMonitor {
+    private static final class DynamicIndexableContentMonitor extends PackageMonitor implements
+            InputManager.InputDeviceListener {
+
         private static final Intent ACCESSIBILITY_SERVICE_INTENT =
                 new Intent(AccessibilityService.SERVICE_INTERFACE);
 
         private static final Intent PRINT_SERVICE_INTENT =
                 new Intent(PrintService.SERVICE_INTERFACE);
 
+        private static final Intent IME_SERVICE_INTENT =
+                new Intent("android.view.InputMethod");
+
         private static final long DELAY_PROCESS_PACKAGE_CHANGE = 2000;
 
         private static final int MSG_PACKAGE_AVAILABLE = 1;
@@ -1304,6 +1313,7 @@ public class SettingsActivity extends Activity
 
         private final List<String> mAccessibilityServices = new ArrayList<String>();
         private final List<String> mPrintServices = new ArrayList<String>();
+        private final List<String> mImeServices = new ArrayList<String>();
 
         private final Handler mHandler = new Handler() {
             @Override
@@ -1322,6 +1332,8 @@ public class SettingsActivity extends Activity
             }
         };
 
+        private final ContentObserver mContentObserver = new MyContentObserver(mHandler);
+
         private Context mContext;
 
         public void register(Context context) {
@@ -1350,13 +1362,41 @@ public class SettingsActivity extends Activity
                         .serviceInfo.packageName);
             }
 
+            // Cache IME service packages to know when they go away.
+            InputMethodManager imeManager = (InputMethodManager)
+                    mContext.getSystemService(Context.INPUT_METHOD_SERVICE);
+            List<InputMethodInfo> inputMethods = imeManager.getInputMethodList();
+            final int inputMethodCount = inputMethods.size();
+            for (int i = 0; i < inputMethodCount; i++) {
+                InputMethodInfo inputMethod = inputMethods.get(i);
+                mImeServices.add(inputMethod.getServiceInfo().packageName);
+            }
+
+            // Watch for related content URIs.
+            mContext.getContentResolver().registerContentObserver(
+                    UserDictionary.Words.CONTENT_URI, true, mContentObserver);
+
+            // Watch for input device changes.
+            InputManager inputManager = (InputManager) context.getSystemService(
+                    Context.INPUT_SERVICE);
+            inputManager.registerInputDeviceListener(this, mHandler);
+
+            // Start tracking packages.
             register(context, Looper.getMainLooper(), UserHandle.CURRENT, false);
         }
 
         public void unregister() {
             super.unregister();
+
+            InputManager inputManager = (InputManager) mContext.getSystemService(
+                    Context.INPUT_SERVICE);
+            inputManager.unregisterInputDeviceListener(this);
+
+            mContext.getContentResolver().unregisterContentObserver(mContentObserver);
+
             mAccessibilityServices.clear();
             mPrintServices.clear();
+            mImeServices.clear();
         }
 
         // Covers installed, appeared external storage with the package, upgraded.
@@ -1385,6 +1425,23 @@ public class SettingsActivity extends Activity
             }
         }
 
+        @Override
+        public void onInputDeviceAdded(int deviceId) {
+            Index.getInstance(mContext).updateFromClassNameResource(
+                    InputMethodAndLanguageSettings.class.getName(), false, true);
+        }
+
+        @Override
+        public void onInputDeviceRemoved(int deviceId) {
+            onInputDeviceChanged(deviceId);
+        }
+
+        @Override
+        public void onInputDeviceChanged(int deviceId) {
+            Index.getInstance(mContext).updateFromClassNameResource(
+                    InputMethodAndLanguageSettings.class.getName(), true, true);
+        }
+
         private void postMessage(int what, String packageName) {
             Message message = mHandler.obtainMessage(what, packageName);
             mHandler.sendMessageDelayed(message, DELAY_PROCESS_PACKAGE_CHANGE);
@@ -1412,6 +1469,17 @@ public class SettingsActivity extends Activity
                 }
                 intent.setPackage(null);
             }
+
+            if (!mImeServices.contains(packageName)) {
+                Intent intent = IME_SERVICE_INTENT;
+                intent.setPackage(packageName);
+                if (!mContext.getPackageManager().queryIntentServices(intent, 0).isEmpty()) {
+                    mImeServices.add(packageName);
+                    Index.getInstance(mContext).updateFromClassNameResource(
+                            InputMethodAndLanguageSettings.class.getName(), false, true);
+                }
+                intent.setPackage(null);
+            }
         }
 
         private void handlePackageUnavailable(String packageName) {
@@ -1429,5 +1497,20 @@ public class SettingsActivity extends Activity
                         PrintSettingsFragment.class.getName(), true, true);
             }
         }
+
+        private final class MyContentObserver extends ContentObserver {
+
+            public MyContentObserver(Handler handler) {
+                super(handler);
+            }
+
+            @Override
+            public void onChange(boolean selfChange, Uri uri) {
+                if (UserDictionary.Words.CONTENT_URI.equals(uri)) {
+                    Index.getInstance(mContext).updateFromClassNameResource(
+                            InputMethodAndLanguageSettings.class.getName(), true, true);
+                }
+            };
+        }
     }
 }