src/android/src/com/google/android/inputmethod/japanese/preference/ClearSymbolHistoryDialogPreference.java

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package org.mozc.android.inputmethod.japanese.preference;

import org.mozc.android.inputmethod.japanese.protobuf.ProtoCommands.GenericStorageEntry.StorageType;
import org.mozc.android.inputmethod.japanese.session.SessionExecutor;
import org.mozc.android.inputmethod.japanese.session.SessionHandlerFactory;

import android.content.Context;
import android.content.DialogInterface;
import android.preference.DialogPreference;
import android.util.AttributeSet;

/**
 * A DialogPreference to clear symbol histories.
 *
 */
public class ClearSymbolHistoryDialogPreference extends DialogPreference {
  public ClearSymbolHistoryDialogPreference(
      Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  public ClearSymbolHistoryDialogPreference(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  @Override
  public void onClick(DialogInterface dialog, int which) {
    if (which == DialogInterface.BUTTON_POSITIVE) {
      SessionExecutor sessionExecutor = SessionExecutor.getInstanceInitializedIfNecessary(
          new SessionHandlerFactory(getContext()), getContext());
      sessionExecutor.clearStorage(StorageType.EMOJI_HISTORY);
      sessionExecutor.clearStorage(StorageType.EMOTICON_HISTORY);
      sessionExecutor.clearStorage(StorageType.SYMBOL_HISTORY);
    }
  }
}