1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.support.v4.text;
18
19/**
20 * Interface for objects that use a heuristic for guessing at the paragraph direction by examining text.
21 */
22public interface TextDirectionHeuristicCompat {
23    /**
24     * Guess if a chars array is in the RTL direction or not.
25     *
26     * @param array the char array.
27     * @param start start index, inclusive.
28     * @param count the length to check, must not be negative and not greater than
29     *          {@code array.length - start}.
30     * @return true if all chars in the range are to be considered in a RTL direction,
31     *          false otherwise.
32     */
33    boolean isRtl(char[] array, int start, int count);
34
35    /**
36     * Guess if a {@code CharSequence} is in the RTL direction or not.
37     *
38     * @param cs the CharSequence.
39     * @param start start index, inclusive.
40     * @param count the length to check, must not be negative and not greater than
41     *            {@code CharSequence.length() - start}.
42     * @return true if all chars in the range are to be considered in a RTL direction,
43     *          false otherwise.
44     */
45    boolean isRtl(CharSequence cs, int start, int count);
46}
47