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      1 /*
      2  * Copyright (C) 2007 Apple Inc.  All rights reserved.
      3  * Copyright (C) 2008 Tony Chang <idealisms (at) 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 !USE(CF) && USE(ICU_UNICODE)
     34 #include "PlatformString.h"
     35 #include <unicode/uset.h>
     36 #include <wtf/Assertions.h>
     37 
     38 namespace WebCore {
     39 
     40 static 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.
     49 static 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 
     93 bool isCharacterSmartReplaceExempt(UChar32 c, bool isPreviousCharacter)
     94 {
     95     return uset_contains(getSmartSet(isPreviousCharacter), c);
     96 }
     97 
     98 }
     99 
    100 #endif // !USE(CF) && USE(ICU_UNICODE)
    101