1/*
2 * Copyright (C) 2011 Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "LocaleToScriptMapping.h"
33
34#include <unicode/uloc.h>
35#include <wtf/text/CString.h>
36#include <wtf/text/WTFString.h>
37
38namespace WebCore {
39
40// Treat certain families of script codes as a single script for assigning a per-script font in Settings.
41static UScriptCode scriptCodeForFontSelection(UScriptCode scriptCode)
42{
43    switch (scriptCode) {
44    case USCRIPT_HIRAGANA:
45    case USCRIPT_KATAKANA:
46    case USCRIPT_JAPANESE:
47        return USCRIPT_KATAKANA_OR_HIRAGANA;
48    case USCRIPT_KOREAN:
49        return USCRIPT_HANGUL;
50    default:
51        return scriptCode;
52    }
53}
54
55UScriptCode localeToScriptCodeForFontSelection(const String& locale)
56{
57    if (locale.isEmpty())
58        return USCRIPT_COMMON;
59
60    char maximizedLocale[ULOC_FULLNAME_CAPACITY];
61    UErrorCode status = U_ZERO_ERROR;
62    uloc_addLikelySubtags(locale.utf8().data(), maximizedLocale, sizeof(maximizedLocale), &status);
63    if (U_FAILURE(status))
64        return USCRIPT_COMMON;
65
66    char script[ULOC_SCRIPT_CAPACITY];
67    uloc_getScript(maximizedLocale, script, sizeof(script), &status);
68    if (U_FAILURE(status))
69        return USCRIPT_COMMON;
70
71    UScriptCode scriptCode = USCRIPT_COMMON;
72    uscript_getCode(script, &scriptCode, 1, &status);
73    // Ignore error that multiple scripts could be returned, since we only want one script.
74    if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
75        return USCRIPT_COMMON;
76
77    return scriptCodeForFontSelection(scriptCode);
78}
79
80UScriptCode scriptNameToCode(const String& name)
81{
82    int32_t code = u_getPropertyValueEnum(UCHAR_SCRIPT, name.utf8().data());
83    if (code >= 0 && code < USCRIPT_CODE_LIMIT)
84        return static_cast<UScriptCode>(code);
85    return USCRIPT_INVALID_CODE;
86}
87
88} // namespace WebCore
89