1/*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 * Copyright (C) 2017 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 * * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#pragma once
33
34#include "WritingMode.h"
35#include <wtf/text/WTFString.h>
36
37namespace WebCore {
38
39// In some circumstances we want to store a String along with the TextDirection
40// of the String as learned from the context of the String. For example,
41// consider storing the title derived from <title dir='rtl'>some title</title>
42// in the history.
43//
44// Note that is explicitly *not* the direction of the string as learned
45// from the characters of the string; it's extra metadata we have external
46// to the string.
47
48struct StringWithDirection {
49 String string;
50 TextDirection direction { TextDirection::LTR };
51};
52
53inline bool operator==(const StringWithDirection& a, const StringWithDirection& b)
54{
55 return a.string == b.string && a.direction == b.direction;
56}
57
58inline bool operator!=(const StringWithDirection& a, const StringWithDirection& b)
59{
60 return !(a == b);
61}
62
63inline StringWithDirection truncateFromEnd(const StringWithDirection& string, unsigned maxLength)
64{
65 return { string.string.left(maxLength), string.direction };
66}
67
68}
69