1/*
2 * Copyright (C) 2007 Apple Inc.  All rights reserved.
3 * Copyright (C) 2008 Tony Chang <idealisms@gmail.com>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1.  Redistributions of source code must retain the above copyright
10 *     notice, this list of conditions and the following disclaimer.
11 * 2.  Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
15 *     its contributors may be used to endorse or promote products derived
16 *     from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "config.h"
31#include "SmartReplace.h"
32
33#if !PLATFORM(CF) && USE(ICU_UNICODE)
34#include "PlatformString.h"
35#include <unicode/uset.h>
36#include <wtf/Assertions.h>
37
38namespace WebCore {
39
40static void addAllCodePoints(USet* smartSet, const String& string)
41{
42    const UChar* characters = string.characters();
43    for (size_t i = 0; i < string.length(); i++)
44        uset_add(smartSet, characters[i]);
45}
46
47// This is mostly a port of the code in WebCore/editing/SmartReplaceCF.cpp
48// except we use icu in place of CoreFoundations character classes.
49static USet* getSmartSet(bool isPreviousCharacter)
50{
51    static USet* preSmartSet = NULL;
52    static USet* postSmartSet = NULL;
53    USet* smartSet = isPreviousCharacter ? preSmartSet : postSmartSet;
54    if (!smartSet) {
55        // Whitespace and newline (kCFCharacterSetWhitespaceAndNewline)
56        UErrorCode ec = U_ZERO_ERROR;
57        String whitespaceAndNewline = "[[:WSpace:] [\\u000A\\u000B\\u000C\\u000D\\u0085]]";
58        smartSet = uset_openPattern(whitespaceAndNewline.characters(), whitespaceAndNewline.length(), &ec);
59        ASSERT(U_SUCCESS(ec));
60
61        // CJK ranges
62        uset_addRange(smartSet, 0x1100, 0x1100 + 256); // Hangul Jamo (0x1100 - 0x11FF)
63        uset_addRange(smartSet, 0x2E80, 0x2E80 + 352); // CJK & Kangxi Radicals (0x2E80 - 0x2FDF)
64        uset_addRange(smartSet, 0x2FF0, 0x2FF0 + 464); // Ideograph Descriptions, CJK Symbols, Hiragana, Katakana, Bopomofo, Hangul Compatibility Jamo, Kanbun, & Bopomofo Ext (0x2FF0 - 0x31BF)
65        uset_addRange(smartSet, 0x3200, 0x3200 + 29392); // Enclosed CJK, CJK Ideographs (Uni Han & Ext A), & Yi (0x3200 - 0xA4CF)
66        uset_addRange(smartSet, 0xAC00, 0xAC00 + 11183); // Hangul Syllables (0xAC00 - 0xD7AF)
67        uset_addRange(smartSet, 0xF900, 0xF900 + 352); // CJK Compatibility Ideographs (0xF900 - 0xFA5F)
68        uset_addRange(smartSet, 0xFE30, 0xFE30 + 32); // CJK Compatibility From (0xFE30 - 0xFE4F)
69        uset_addRange(smartSet, 0xFF00, 0xFF00 + 240); // Half/Full Width Form (0xFF00 - 0xFFEF)
70        uset_addRange(smartSet, 0x20000, 0x20000 + 0xA6D7); // CJK Ideograph Exntension B
71        uset_addRange(smartSet, 0x2F800, 0x2F800 + 0x021E); // CJK Compatibility Ideographs (0x2F800 - 0x2FA1D)
72
73        if (isPreviousCharacter) {
74            addAllCodePoints(smartSet, "([\"\'#$/-`{");
75            preSmartSet = smartSet;
76        } else {
77            addAllCodePoints(smartSet, ")].,;:?\'!\"%*-/}");
78
79            // Punctuation (kCFCharacterSetPunctuation)
80            UErrorCode ec = U_ZERO_ERROR;
81            String punctuationClass = "[:P:]";
82            USet* icuPunct = uset_openPattern(punctuationClass.characters(), punctuationClass.length(), &ec);
83            ASSERT(U_SUCCESS(ec));
84            uset_addAll(smartSet, icuPunct);
85            uset_close(icuPunct);
86
87            postSmartSet = smartSet;
88        }
89    }
90    return smartSet;
91}
92
93bool isCharacterSmartReplaceExempt(UChar32 c, bool isPreviousCharacter)
94{
95    return uset_contains(getSmartSet(isPreviousCharacter), c);
96}
97
98}
99
100#endif // !PLATFORM(CF) && USE(ICU_UNICODE)
101