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// There are certain families of script codes that we want to treat as a single
41// script for the purpose of assigning a per-script font in Settings. For
42// example, USCRIPT_HIRAGANA, USCRIPT_KATAKANA, USCRIPT_JAPANESE, and
43// USCRIPT_KATAKANA_OR_HIRAGANA are all "Japanese" and there is no value in
44// distinguishing between them. So we just pick one script code to be the
45// canonical one with this function, and in Settings assign a font for that
46// script.
47static UScriptCode canonicalizeScriptCode(UScriptCode scriptCode)
48{
49 switch (scriptCode) {
50 case USCRIPT_HIRAGANA:
51 case USCRIPT_KATAKANA:
52 case USCRIPT_JAPANESE:
53 return USCRIPT_KATAKANA_OR_HIRAGANA;
54 case USCRIPT_KOREAN:
55 return USCRIPT_HANGUL;
56 default:
57 return scriptCode;
58 }
59}
60
61UScriptCode localeToScriptCode(const String& locale)
62{
63 if (locale.isEmpty())
64 return USCRIPT_COMMON;
65
66 char maximizedLocale[ULOC_FULLNAME_CAPACITY];
67 UErrorCode status = U_ZERO_ERROR;
68 uloc_addLikelySubtags(locale.utf8().data(), maximizedLocale, sizeof(maximizedLocale), &status);
69 if (U_FAILURE(status))
70 return USCRIPT_COMMON;
71
72 char script[ULOC_SCRIPT_CAPACITY];
73 uloc_getScript(maximizedLocale, script, sizeof(script), &status);
74 if (U_FAILURE(status))
75 return USCRIPT_COMMON;
76
77 UScriptCode scriptCode;
78 uscript_getCode(script, &scriptCode, 1, &status);
79 // Ignore error that multiple scripts could be returned, since we only want
80 // one script.
81 if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
82 return USCRIPT_COMMON;
83
84 return canonicalizeScriptCode(scriptCode);
85}
86
87} // namespace WebCore