Migrate VirtualKeyboardFragment to DashboardFragment

Fixes: 134451794
Test: robolectric
Change-Id: I2a40090178b3daea894bdad570549c7bfa34e4e6

src/com/android/settings/inputmethod/InputMethodPreferenceController.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2019 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.settings.inputmethod;
+
+import android.app.admin.DevicePolicyManager;
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.view.inputmethod.InputMethodInfo;
+import android.view.inputmethod.InputMethodManager;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.inputmethod.InputMethodPreference;
+
+import java.text.Collator;
+import java.util.ArrayList;
+import java.util.List;
+import com.google.common.annotations.VisibleForTesting;
+
+public class InputMethodPreferenceController extends BasePreferenceController implements
+        LifecycleObserver, OnStart {
+
+    @VisibleForTesting
+    PreferenceScreen mScreen;
+    private Preference mPreference;
+    private InputMethodManager mImm;
+    private DevicePolicyManager mDpm;
+
+    public InputMethodPreferenceController(Context context, String key) {
+        super(context, key);
+        mImm = context.getSystemService(InputMethodManager.class);
+        mDpm = context.getSystemService(DevicePolicyManager.class);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE_UNSEARCHABLE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mScreen = screen;
+        mPreference = mScreen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void onStart() {
+        updateInputMethodPreferenceViews();
+    }
+
+    private void updateInputMethodPreferenceViews() {
+        final List<InputMethodPreference> preferenceList = new ArrayList<>();
+
+        final List<String> permittedList = mDpm.getPermittedInputMethodsForCurrentUser();
+        final List<InputMethodInfo> imis = mImm.getEnabledInputMethodList();
+        final int N = (imis == null ? 0 : imis.size());
+        for (int i = 0; i < N; ++i) {
+            final InputMethodInfo imi = imis.get(i);
+            final boolean isAllowedByOrganization = permittedList == null
+                    || permittedList.contains(imi.getPackageName());
+            final Drawable icon = imi.loadIcon(mContext.getPackageManager());
+            final InputMethodPreference pref = new InputMethodPreference(
+                    mScreen.getContext(),
+                    imi,
+                    false,  /* isImeEnabler */
+                    isAllowedByOrganization,
+                    null  /* this can be null since isImeEnabler is false */);
+            pref.setIcon(icon);
+            preferenceList.add(pref);
+        }
+        final Collator collator = Collator.getInstance();
+        preferenceList.sort((lhs, rhs) -> lhs.compareTo(rhs, collator));
+        mScreen.removeAll();
+        for (int i = 0; i < N; ++i) {
+            final InputMethodPreference pref = preferenceList.get(i);
+            pref.setOrder(i);
+            mScreen.addPreference(pref);
+            pref.updatePreferenceViews();
+        }
+        mScreen.addPreference(mPreference);
+    }
+}