[LatinIME] Support MNC permissions.

This build has been compiled against API 23

This build is approved to go out with the M OTA, but may NOT be released
to the public until the Play Store has enabled API level 23 apps

Version: 4.1.2300x.build_id

1. Replaces the personalization is on information with the suggest
   contacts.
2. Enables "Use Contacts" only if the app has permission to read
   contacts.
3. Disables the contacts dictionary in the Facilitator.
4. Do not register/read the contacts in the contact observer.

Bug: 22236416
Change-Id: I9674e13d0d0f4a2014c5024fde0178de684c07e7

3 files changed, 281 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/permissions/PermissionsActivity.java b/java/src/com/android/inputmethod/latin/permissions/PermissionsActivity.java
new file mode 100644
index 000000000..bdd63fa00
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/permissions/PermissionsActivity.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2015 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.inputmethod.latin.permissions;
+
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.v4.app.ActivityCompat;
+
+/**
+ * An activity to help request permissions. It's used when no other activity is available, e.g. in
+ * InputMethodService. This activity assumes that all permissions are not granted yet.
+ */
+public final class PermissionsActivity
+        extends Activity implements ActivityCompat.OnRequestPermissionsResultCallback {
+
+    /**
+     * Key to retrieve requested permissions from the intent.
+     */
+    public static final String EXTRA_PERMISSION_REQUESTED_PERMISSIONS = "requested_permissions";
+
+    /**
+     * Key to retrieve request code from the intent.
+     */
+    public static final String EXTRA_PERMISSION_REQUEST_CODE = "request_code";
+
+    private static final int INVALID_REQUEST_CODE = -1;
+
+    private int mPendingRequestCode = INVALID_REQUEST_CODE;
+
+    /**
+     * Starts a PermissionsActivity and checks/requests supplied permissions.
+     */
+    public static void run(
+            @NonNull Context context, int requestCode, @NonNull String... permissionStrings) {
+        Intent intent = new Intent(context.getApplicationContext(), PermissionsActivity.class);
+        intent.putExtra(EXTRA_PERMISSION_REQUESTED_PERMISSIONS, permissionStrings);
+        intent.putExtra(EXTRA_PERMISSION_REQUEST_CODE, requestCode);
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
+        context.startActivity(intent);
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        mPendingRequestCode = (savedInstanceState != null)
+                ? savedInstanceState.getInt(EXTRA_PERMISSION_REQUEST_CODE, INVALID_REQUEST_CODE)
+                : INVALID_REQUEST_CODE;
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putInt(EXTRA_PERMISSION_REQUEST_CODE, mPendingRequestCode);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        // Only do request when there is no pending request to avoid duplicated requests.
+        if (mPendingRequestCode == INVALID_REQUEST_CODE) {
+            final Bundle extras = getIntent().getExtras();
+            final String[] permissionsToRequest =
+                    extras.getStringArray(EXTRA_PERMISSION_REQUESTED_PERMISSIONS);
+            mPendingRequestCode = extras.getInt(EXTRA_PERMISSION_REQUEST_CODE);
+            // Assuming that all supplied permissions are not granted yet, so that we don't need to
+            // check them again.
+            PermissionsUtil.requestPermissions(this, mPendingRequestCode, permissionsToRequest);
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(
+            int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        mPendingRequestCode = INVALID_REQUEST_CODE;
+        PermissionsManager.get(this).onRequestPermissionsResult(
+                requestCode, permissions, grantResults);
+        finish();
+    }
+}
diff --git a/java/src/com/android/inputmethod/latin/permissions/PermissionsManager.java b/java/src/com/android/inputmethod/latin/permissions/PermissionsManager.java
new file mode 100644
index 000000000..08c623ab5
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/permissions/PermissionsManager.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2015 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.inputmethod.latin.permissions;
+
+import android.app.Activity;
+import android.content.Context;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * Manager to perform permission related tasks. Always call on the UI thread.
+ */
+public class PermissionsManager {
+
+    public interface PermissionsResultCallback {
+        void onRequestPermissionsResult(boolean allGranted);
+    }
+
+    private int mRequestCodeId;
+
+    private final Context mContext;
+    private final Map<Integer, PermissionsResultCallback> mRequestIdToCallback = new HashMap<>();
+
+    private static PermissionsManager sInstance;
+
+    public PermissionsManager(Context context) {
+        mContext = context;
+    }
+
+    @Nonnull
+    public static synchronized PermissionsManager get(@Nonnull Context context) {
+        if (sInstance == null) {
+            sInstance = new PermissionsManager(context);
+        }
+        return sInstance;
+    }
+
+    private synchronized int getNextRequestId() {
+        return ++mRequestCodeId;
+    }
+
+
+    public synchronized void requestPermissions(@Nonnull PermissionsResultCallback callback,
+                                   @Nullable Activity activity,
+                                   String... permissionsToRequest) {
+        List<String> deniedPermissions = PermissionsUtil.getDeniedPermissions(
+                mContext, permissionsToRequest);
+        if (deniedPermissions.isEmpty()) {
+            return;
+        }
+        // otherwise request the permissions.
+        int requestId = getNextRequestId();
+        String[] permissionsArray = deniedPermissions.toArray(
+                new String[deniedPermissions.size()]);
+
+        mRequestIdToCallback.put(requestId, callback);
+        if (activity != null) {
+            PermissionsUtil.requestPermissions(activity, requestId, permissionsArray);
+        } else {
+            PermissionsActivity.run(mContext, requestId, permissionsArray);
+        }
+    }
+
+    public synchronized void onRequestPermissionsResult(
+            int requestCode, String[] permissions, int[] grantResults) {
+        PermissionsResultCallback permissionsResultCallback = mRequestIdToCallback.get(requestCode);
+        mRequestIdToCallback.remove(requestCode);
+
+        boolean allGranted = PermissionsUtil.allGranted(grantResults);
+        permissionsResultCallback.onRequestPermissionsResult(allGranted);
+    }
+}
diff --git a/java/src/com/android/inputmethod/latin/permissions/PermissionsUtil.java b/java/src/com/android/inputmethod/latin/permissions/PermissionsUtil.java
new file mode 100644
index 000000000..747f64f24
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/permissions/PermissionsUtil.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2015 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.inputmethod.latin.permissions;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Utility class for permissions.
+ */
+public class PermissionsUtil {
+
+    /**
+     * Returns the list of permissions not granted from the given list of permissions.
+     * @param context Context
+     * @param permissions list of permissions to check.
+     * @return the list of permissions that do not have permission to use.
+     */
+    public static List<String> getDeniedPermissions(Context context,
+                                                          String... permissions) {
+        final List<String> deniedPermissions = new ArrayList<>();
+        for (String permission : permissions) {
+            if (ContextCompat.checkSelfPermission(context, permission)
+                    != PackageManager.PERMISSION_GRANTED) {
+                deniedPermissions.add(permission);
+            }
+        }
+        return deniedPermissions;
+    }
+
+    /**
+     * Uses the given activity and requests the user for permissions.
+     * @param activity activity to use.
+     * @param requestCode request code/id to use.
+     * @param permissions String array of permissions that needs to be requested.
+     */
+    public static void requestPermissions(Activity activity, int requestCode,
+                                          String[] permissions) {
+        ActivityCompat.requestPermissions(activity, permissions, requestCode);
+    }
+
+    /**
+     * Checks if all the permissions are granted.
+     */
+    public static boolean allGranted(@NonNull int[] grantResults) {
+        for (int result : grantResults) {
+            if (result != PackageManager.PERMISSION_GRANTED) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Queries if al the permissions are granted for the given permission strings.
+     */
+    public static boolean checkAllPermissionsGranted(Context context, String... permissions) {
+        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP_MR1) {
+            // For all pre-M devices, we should have all the premissions granted on install.
+            return true;
+        }
+
+        for (String permission : permissions) {
+            if (ContextCompat.checkSelfPermission(context, permission)
+                    != PackageManager.PERMISSION_GRANTED) {
+                return false;
+            }
+        }
+        return true;
+    }
+}