1/*
2 * Copyright (C) 2011 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef LocalizedDateCache_h
27#define LocalizedDateCache_h
28
29#include "DateComponents.h"
30#include "Font.h"
31#include <wtf/HashMap.h>
32#include <wtf/NeverDestroyed.h>
33#include <wtf/RetainPtr.h>
34
35// FIXME: Rename this file to LocalizedDataCacheIOS.mm and remove this guard.
36#if PLATFORM(IOS)
37
38namespace WebCore {
39
40class MeasureTextClient {
41public:
42    virtual float measureText(const String&) const = 0;
43    virtual ~MeasureTextClient() { }
44};
45
46class LocalizedDateCache {
47public:
48    NSDateFormatter *formatterForDateType(DateComponents::Type);
49    float maximumWidthForDateType(DateComponents::Type, const Font&, const MeasureTextClient&);
50    void localeChanged();
51
52private:
53    LocalizedDateCache();
54    ~LocalizedDateCache();
55
56    NSDateFormatter *createFormatterForType(DateComponents::Type);
57    float calculateMaximumWidth(DateComponents::Type, const MeasureTextClient&);
58
59    // Using int instead of DateComponents::Type for the key because the enum
60    // does not have a default hash and hash traits. Usage of the maps
61    // casts the DateComponents::Type into an int as the key.
62    typedef HashMap<int, RetainPtr<NSDateFormatter>> DateTypeFormatterMap;
63    typedef HashMap<int, float> DateTypeMaxWidthMap;
64    DateTypeFormatterMap m_formatterMap;
65    DateTypeMaxWidthMap m_maxWidthMap;
66    Font m_font;
67
68    friend LocalizedDateCache& localizedDateCache();
69    friend NeverDestroyed<LocalizedDateCache>;
70};
71
72// Singleton.
73LocalizedDateCache& localizedDateCache();
74
75} // namespace WebCore
76
77#endif // PLATFORM(IOS)
78#endif // LocalizedDateCache_h
79