| /* |
| * 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 THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_ITERATORS_SEARCH_BUFFER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_ITERATORS_SEARCH_BUFFER_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/editing/finder/find_options.h" |
| #include "third_party/blink/renderer/core/editing/forward.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/forward.h" |
| #include "third_party/blink/renderer/platform/wtf/text/unicode.h" |
| #include "third_party/blink/renderer/platform/wtf/vector.h" |
| |
| namespace blink { |
| |
| class TextSearcherICU; |
| |
| // 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 it should be starting at a word start (WholeWord is set). |
| class SearchBuffer { |
| STACK_ALLOCATED(); |
| |
| 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*, wtf_size_t length); |
| wtf_size_t NumberOfCharactersJustAppended() const { |
| return number_of_characters_just_appended_; |
| } |
| |
| bool NeedsMoreContext() const; |
| void PrependContext(const UChar*, wtf_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. |
| wtf_size_t Search(wtf_size_t& start_offset); |
| bool AtBreak() const; |
| |
| private: |
| bool IsBadMatch(const UChar*, wtf_size_t length) const; |
| bool IsWordStartMatch(wtf_size_t start, wtf_size_t length) const; |
| |
| Vector<UChar> target_; |
| FindOptions options_; |
| |
| Vector<UChar> buffer_; |
| wtf_size_t overlap_; |
| wtf_size_t prefix_length_; |
| wtf_size_t number_of_characters_just_appended_; |
| bool at_break_; |
| bool needs_more_context_; |
| |
| bool target_requires_kana_workaround_; |
| Vector<UChar> normalized_target_; |
| mutable Vector<UChar> normalized_match_; |
| |
| std::unique_ptr<TextSearcherICU> text_searcher_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SearchBuffer); |
| }; |
| |
| CORE_EXPORT EphemeralRange FindPlainText(const EphemeralRange& input_range, |
| const String&, |
| FindOptions); |
| CORE_EXPORT EphemeralRangeInFlatTree |
| FindPlainText(const EphemeralRangeInFlatTree& input_range, |
| const String&, |
| FindOptions); |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_ITERATORS_SEARCH_BUFFER_H_ |