/*

 * Copyright (C) 2007 Apple Inc.  All rights reserved.

 * Copyright (C) 2008 Tony Chang <idealisms@gmail.com>

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer. 

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "SmartReplace.h"

#if !PLATFORM(CF) && USE(ICU_UNICODE)

#include "PlatformString.h"

#include <unicode/uset.h>

#include <wtf/Assertions.h>

namespace WebCore {

static void addAllCodePoints(USet* smartSet, const String& string)

{

    const UChar* characters = string.characters();

    for (size_t i = 0; i < string.length(); i++)

        uset_add(smartSet, characters[i]);

}

// This is mostly a port of the code in WebCore/editing/SmartReplaceCF.cpp

// except we use icu in place of CoreFoundations character classes.

static USet* getSmartSet(bool isPreviousCharacter)

{

    static USet* preSmartSet = NULL; 

    static USet* postSmartSet = NULL;

    USet* smartSet = isPreviousCharacter ? preSmartSet : postSmartSet;

    if (!smartSet) {

        // Whitespace and newline (kCFCharacterSetWhitespaceAndNewline)

        UErrorCode ec = U_ZERO_ERROR;

        String whitespaceAndNewline = "[[:WSpace:] [\\u000A\\u000B\\u000C\\u000D\\u0085]]";

        smartSet = uset_openPattern(whitespaceAndNewline.characters(), whitespaceAndNewline.length(), &ec);

        ASSERT(U_SUCCESS(ec));

        // CJK ranges

        uset_addRange(smartSet, 0x1100, 0x1100 + 256); // Hangul Jamo (0x1100 - 0x11FF)

        uset_addRange(smartSet, 0x2E80, 0x2E80 + 352); // CJK & Kangxi Radicals (0x2E80 - 0x2FDF)

        uset_addRange(smartSet, 0x2FF0, 0x2FF0 + 464); // Ideograph Descriptions, CJK Symbols, Hiragana, Katakana, Bopomofo, Hangul Compatibility Jamo, Kanbun, & Bopomofo Ext (0x2FF0 - 0x31BF)

        uset_addRange(smartSet, 0x3200, 0x3200 + 29392); // Enclosed CJK, CJK Ideographs (Uni Han & Ext A), & Yi (0x3200 - 0xA4CF)

        uset_addRange(smartSet, 0xAC00, 0xAC00 + 11183); // Hangul Syllables (0xAC00 - 0xD7AF)

        uset_addRange(smartSet, 0xF900, 0xF900 + 352); // CJK Compatibility Ideographs (0xF900 - 0xFA5F)

        uset_addRange(smartSet, 0xFE30, 0xFE30 + 32); // CJK Compatibility From (0xFE30 - 0xFE4F)

        uset_addRange(smartSet, 0xFF00, 0xFF00 + 240); // Half/Full Width Form (0xFF00 - 0xFFEF)

        uset_addRange(smartSet, 0x20000, 0x20000 + 0xA6D7); // CJK Ideograph Exntension B

        uset_addRange(smartSet, 0x2F800, 0x2F800 + 0x021E); // CJK Compatibility Ideographs (0x2F800 - 0x2FA1D)

        if (isPreviousCharacter) {

            addAllCodePoints(smartSet, "([\"\'#$/-`{");

            preSmartSet = smartSet;

        } else {

            addAllCodePoints(smartSet, ")].,;:?\'!\"%*-/}");

            // Punctuation (kCFCharacterSetPunctuation)

            UErrorCode ec = U_ZERO_ERROR;

            String punctuationClass = "[:P:]";

            USet* icuPunct = uset_openPattern(punctuationClass.characters(), punctuationClass.length(), &ec);

            ASSERT(U_SUCCESS(ec));

            uset_addAll(smartSet, icuPunct);

            uset_close(icuPunct);

            postSmartSet = smartSet;

        }

    }

    return smartSet;

}

bool isCharacterSmartReplaceExempt(UChar32 c, bool isPreviousCharacter)

{

    return uset_contains(getSmartSet(isPreviousCharacter), c);

}

}

#endif // !PLATFORM(CF) && USE(ICU_UNICODE)