/*
|
* Copyright (C) 2017 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.content.Context;
|
import android.database.Cursor;
|
import android.database.MatrixCursor;
|
import android.provider.UserDictionary;
|
import android.util.ArraySet;
|
|
import androidx.annotation.VisibleForTesting;
|
import androidx.loader.content.CursorLoader;
|
|
import java.util.Locale;
|
import java.util.Objects;
|
import java.util.Set;
|
|
public class UserDictionaryCursorLoader extends CursorLoader {
|
|
@VisibleForTesting
|
static final String[] QUERY_PROJECTION = {
|
UserDictionary.Words._ID,
|
UserDictionary.Words.WORD,
|
UserDictionary.Words.SHORTCUT
|
};
|
|
// The index of the shortcut in the above array.
|
static final int INDEX_SHORTCUT = 2;
|
|
// Either the locale is empty (means the word is applicable to all locales)
|
// or the word equals our current locale
|
private static final String QUERY_SELECTION =
|
UserDictionary.Words.LOCALE + "=?";
|
private static final String QUERY_SELECTION_ALL_LOCALES =
|
UserDictionary.Words.LOCALE + " is null";
|
|
|
// Locale can be any of:
|
// - The string representation of a locale, as returned by Locale#toString()
|
// - The empty string. This means we want a cursor returning words valid for all locales.
|
// - null. This means we want a cursor for the current locale, whatever this is.
|
// Note that this contrasts with the data inside the database, where NULL means "all
|
// locales" and there should never be an empty string. The confusion is called by the
|
// historical use of null for "all locales".
|
// TODO: it should be easy to make this more readable by making the special values
|
// human-readable, like "all_locales" and "current_locales" strings, provided they
|
// can be guaranteed not to match locales that may exist.
|
private final String mLocale;
|
|
public UserDictionaryCursorLoader(Context context, String locale) {
|
super(context);
|
mLocale = locale;
|
}
|
|
@Override
|
public Cursor loadInBackground() {
|
final MatrixCursor result = new MatrixCursor(QUERY_PROJECTION);
|
final Cursor candidate;
|
if ("".equals(mLocale)) {
|
// Case-insensitive sort
|
candidate = getContext().getContentResolver().query(
|
UserDictionary.Words.CONTENT_URI, QUERY_PROJECTION,
|
QUERY_SELECTION_ALL_LOCALES, null,
|
"UPPER(" + UserDictionary.Words.WORD + ")");
|
} else {
|
final String queryLocale = null != mLocale ? mLocale : Locale.getDefault().toString();
|
candidate = getContext().getContentResolver().query(UserDictionary.Words.CONTENT_URI,
|
QUERY_PROJECTION, QUERY_SELECTION,
|
new String[]{queryLocale}, "UPPER(" + UserDictionary.Words.WORD + ")");
|
}
|
final Set<Integer> hashSet = new ArraySet<>();
|
for (candidate.moveToFirst(); !candidate.isAfterLast(); candidate.moveToNext()) {
|
final int id = candidate.getInt(0);
|
final String word = candidate.getString(1);
|
final String shortcut = candidate.getString(2);
|
final int hash = Objects.hash(word, shortcut);
|
if (hashSet.contains(hash)) {
|
continue;
|
}
|
hashSet.add(hash);
|
result.addRow(new Object[]{id, word, shortcut});
|
}
|
return result;
|
}
|
}
|
