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 "core/editing/SmartReplace.h"
32
33#if !USE(CF)
34#include "wtf/Assertions.h"
35#include "wtf/text/WTFString.h"
36#include <unicode/uset.h>
37
38namespace blink {
39
40static void addAllCodePoints(USet* smartSet, const String& string)
41{
42    for (size_t i = 0; i < string.length(); i++)
43        uset_add(smartSet, string[i]);
44}
45
46// This is mostly a port of the code in WebCore/editing/SmartReplaceCF.cpp
47// except we use icu in place of CoreFoundations character classes.
48static USet* getSmartSet(bool isPreviousCharacter)
49{
50    static USet* preSmartSet = NULL;
51    static USet* postSmartSet = NULL;
52    USet* smartSet = isPreviousCharacter ? preSmartSet : postSmartSet;
53    if (!smartSet) {
54        // Whitespace and newline (kCFCharacterSetWhitespaceAndNewline)
55        UErrorCode ec = U_ZERO_ERROR;
56        String whitespaceAndNewline("[[:WSpace:] [\\u000A\\u000B\\u000C\\u000D\\u0085]]");
57        smartSet = uset_openPattern(whitespaceAndNewline.charactersWithNullTermination().data(), whitespaceAndNewline.length(), &ec);
58        ASSERT(U_SUCCESS(ec));
59
60        // CJK ranges
61        uset_addRange(smartSet, 0x1100, 0x1100 + 256); // Hangul Jamo (0x1100 - 0x11FF)
62        uset_addRange(smartSet, 0x2E80, 0x2E80 + 352); // CJK & Kangxi Radicals (0x2E80 - 0x2FDF)
63        uset_addRange(smartSet, 0x2FF0, 0x2FF0 + 464); // Ideograph Descriptions, CJK Symbols, Hiragana, Katakana, Bopomofo, Hangul Compatibility Jamo, Kanbun, & Bopomofo Ext (0x2FF0 - 0x31BF)
64        uset_addRange(smartSet, 0x3200, 0x3200 + 29392); // Enclosed CJK, CJK Ideographs (Uni Han & Ext A), & Yi (0x3200 - 0xA4CF)
65        uset_addRange(smartSet, 0xAC00, 0xAC00 + 11183); // Hangul Syllables (0xAC00 - 0xD7AF)
66        uset_addRange(smartSet, 0xF900, 0xF900 + 352); // CJK Compatibility Ideographs (0xF900 - 0xFA5F)
67        uset_addRange(smartSet, 0xFE30, 0xFE30 + 32); // CJK Compatibility From (0xFE30 - 0xFE4F)
68        uset_addRange(smartSet, 0xFF00, 0xFF00 + 240); // Half/Full Width Form (0xFF00 - 0xFFEF)
69        uset_addRange(smartSet, 0x20000, 0x20000 + 0xA6D7); // CJK Ideograph Exntension B
70        uset_addRange(smartSet, 0x2F800, 0x2F800 + 0x021E); // CJK Compatibility Ideographs (0x2F800 - 0x2FA1D)
71
72        if (isPreviousCharacter) {
73            addAllCodePoints(smartSet, "([\"\'#$/-`{");
74            preSmartSet = smartSet;
75        } else {
76            addAllCodePoints(smartSet, ")].,;:?\'!\"%*-/}");
77
78            // Punctuation (kCFCharacterSetPunctuation)
79            UErrorCode ec = U_ZERO_ERROR;
80            String punctuationClass("[:P:]");
81            USet* icuPunct = uset_openPattern(punctuationClass.charactersWithNullTermination().data(), punctuationClass.length(), &ec);
82            ASSERT(U_SUCCESS(ec));
83            uset_addAll(smartSet, icuPunct);
84            uset_close(icuPunct);
85
86            postSmartSet = smartSet;
87        }
88    }
89    return smartSet;
90}
91
92bool isCharacterSmartReplaceExempt(UChar32 c, bool isPreviousCharacter)
93{
94    return uset_contains(getSmartSet(isPreviousCharacter), c);
95}
96
97}
98
99#endif // !USE(CF)
100