content: /*
   * Copyright (C) 2011 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 android.text.method;
  
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.annotation.UnsupportedAppUsage;
  import android.content.Context;
  import android.graphics.Rect;
  import android.text.Spanned;
  import android.text.TextUtils;
  import android.util.Log;
  import android.view.View;
  import android.widget.TextView;
  
  import java.util.Locale;
  
  /**
   * Transforms source text into an ALL CAPS string, locale-aware.
   *
   * @hide
   */
  public class AllCapsTransformationMethod implements TransformationMethod2 {
      private static final String TAG = "AllCapsTransformationMethod";
  
      private boolean mEnabled;
      private Locale mLocale;
  
      @UnsupportedAppUsage
      public AllCapsTransformationMethod(@NonNull Context context) {
          mLocale = context.getResources().getConfiguration().getLocales().get(0);
      }
  
      @Override
      public CharSequence getTransformation(@Nullable CharSequence source, View view) {
          if (!mEnabled) {
              Log.w(TAG, "Caller did not enable length changes; not transforming text");
              return source;
          }
  
          if (source == null) {
              return null;
          }
  
          Locale locale = null;
          if (view instanceof TextView) {
              locale = ((TextView)view).getTextLocale();
          }
          if (locale == null) {
              locale = mLocale;
          }
          final boolean copySpans = source instanceof Spanned;
          return TextUtils.toUpperCase(locale, source, copySpans);
      }
  
      @Override
      public void onFocusChanged(View view, CharSequence sourceText, boolean focused, int direction,
              Rect previouslyFocusedRect) {
      }
  
      @Override
      public void setLengthChangesAllowed(boolean allowLengthChanges) {
          mEnabled = allowLengthChanges;
      }
  
  }
  