| /* |
| * Copyright (C) 2004, 2006, 2009 Apple Inc. All rights reserved. |
| * |
| * 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR |
| * 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. |
| */ |
| |
| #ifndef SearchBuffer_h |
| #define SearchBuffer_h |
| |
| #include "core/CoreExport.h" |
| #include "core/editing/EphemeralRange.h" |
| #include "core/editing/FindOptions.h" |
| #include "wtf/Allocator.h" |
| #include "wtf/Vector.h" |
| |
| namespace blink { |
| |
| // Buffer that knows how to compare with a search target. |
| // Keeps enough of the previous text to be able to search in the future, but no |
| // more. Non-breaking spaces are always equal to normal spaces. Case folding is |
| // also done if the CaseInsensitive option is specified. Matches are further |
| // filtered if the AtWordStarts option is specified, although some matches |
| // inside a word are permitted if TreatMedialCapitalAsWordStart is specified as |
| // well. |
| class SearchBuffer { |
| STACK_ALLOCATED(); |
| WTF_MAKE_NONCOPYABLE(SearchBuffer); |
| public: |
| SearchBuffer(const String& target, FindOptions); |
| ~SearchBuffer(); |
| |
| // Returns number of characters appended; guaranteed to be in the range |
| // [1, length]. |
| template<typename CharType> |
| void append(const CharType*, size_t length); |
| size_t numberOfCharactersJustAppended() const { return m_numberOfCharactersJustAppended; } |
| |
| bool needsMoreContext() const; |
| void prependContext(const UChar*, size_t length); |
| void reachedBreak(); |
| |
| // Result is the size in characters of what was found. |
| // And <startOffset> is the number of characters back to the start of what |
| // was found. |
| size_t search(size_t& startOffset); |
| bool atBreak() const; |
| |
| private: |
| bool isBadMatch(const UChar*, size_t length) const; |
| bool isWordStartMatch(size_t start, size_t length) const; |
| |
| Vector<UChar> m_target; |
| FindOptions m_options; |
| |
| Vector<UChar> m_buffer; |
| size_t m_overlap; |
| size_t m_prefixLength; |
| size_t m_numberOfCharactersJustAppended; |
| bool m_atBreak; |
| bool m_needsMoreContext; |
| |
| bool m_targetRequiresKanaWorkaround; |
| Vector<UChar> m_normalizedTarget; |
| mutable Vector<UChar> m_normalizedMatch; |
| }; |
| |
| CORE_EXPORT EphemeralRange findPlainText(const EphemeralRange& inputRange, const String&, FindOptions); |
| CORE_EXPORT EphemeralRangeInFlatTree findPlainText(const EphemeralRangeInFlatTree& inputRange, const String&, FindOptions); |
| |
| } // namespace blink |
| |
| #endif // SearchBuffer_h |