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      1 /*
      2  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
      3  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #ifndef TextCheckingHelper_h
     22 #define TextCheckingHelper_h
     23 
     24 #include "platform/text/TextChecking.h"
     25 #include "wtf/text/WTFString.h"
     26 
     27 namespace WebCore {
     28 
     29 class ExceptionState;
     30 class Frame;
     31 class Range;
     32 class Position;
     33 class SpellCheckerClient;
     34 class TextCheckerClient;
     35 struct TextCheckingResult;
     36 
     37 class TextCheckingParagraph {
     38 public:
     39     explicit TextCheckingParagraph(PassRefPtr<Range> checkingRange);
     40     TextCheckingParagraph(PassRefPtr<Range> checkingRange, PassRefPtr<Range> paragraphRange);
     41     ~TextCheckingParagraph();
     42 
     43     int rangeLength() const;
     44     PassRefPtr<Range> subrange(int characterOffset, int characterCount) const;
     45     int offsetTo(const Position&, ExceptionState&) const;
     46     void expandRangeToNextEnd();
     47 
     48     const String& text() const;
     49     // Why not let clients call these functions on text() themselves?
     50     String textSubstring(unsigned pos, unsigned len = INT_MAX) const { return text().substring(pos, len); }
     51     UChar textCharAt(int index) const { return text()[static_cast<unsigned>(index)]; }
     52 
     53     bool isEmpty() const;
     54     bool isTextEmpty() const { return text().isEmpty(); }
     55     bool isRangeEmpty() const { return checkingStart() >= checkingEnd(); }
     56 
     57     int checkingStart() const;
     58     int checkingEnd() const;
     59     int checkingLength() const;
     60     String checkingSubstring() const { return textSubstring(checkingStart(), checkingLength()); }
     61 
     62     bool checkingRangeCovers(int location, int length) const { return location < checkingEnd() && location + length > checkingStart(); }
     63     PassRefPtr<Range> paragraphRange() const;
     64     PassRefPtr<Range> checkingRange() const { return m_checkingRange; }
     65 
     66 private:
     67     void invalidateParagraphRangeValues();
     68     PassRefPtr<Range> offsetAsRange() const;
     69 
     70     RefPtr<Range> m_checkingRange;
     71     mutable RefPtr<Range> m_paragraphRange;
     72     mutable RefPtr<Range> m_offsetAsRange;
     73     mutable String m_text;
     74     mutable int m_checkingStart;
     75     mutable int m_checkingEnd;
     76     mutable int m_checkingLength;
     77 };
     78 
     79 class TextCheckingHelper {
     80     WTF_MAKE_NONCOPYABLE(TextCheckingHelper);
     81 public:
     82     TextCheckingHelper(SpellCheckerClient&, PassRefPtr<Range>);
     83     ~TextCheckingHelper();
     84 
     85     String findFirstMisspelling(int& firstMisspellingOffset, bool markAll, RefPtr<Range>& firstMisspellingRange);
     86     String findFirstMisspellingOrBadGrammar(bool checkGrammar, bool& outIsSpelling, int& outFirstFoundOffset, GrammarDetail& outGrammarDetail);
     87     String findFirstBadGrammar(GrammarDetail& outGrammarDetail, int& outGrammarPhraseOffset, bool markAll);
     88     void markAllMisspellings(RefPtr<Range>& firstMisspellingRange);
     89     void markAllBadGrammar();
     90 
     91 private:
     92     SpellCheckerClient* m_client;
     93     RefPtr<Range> m_range;
     94 
     95     int findFirstGrammarDetail(const Vector<GrammarDetail>& grammarDetails, int badGrammarPhraseLocation, int startOffset, int endOffset, bool markAll) const;
     96     bool unifiedTextCheckerEnabled() const;
     97 };
     98 
     99 void checkTextOfParagraph(TextCheckerClient&, const String&, TextCheckingTypeMask, Vector<TextCheckingResult>&);
    100 
    101 bool unifiedTextCheckerEnabled(const Frame*);
    102 
    103 } // namespace WebCore
    104 
    105 #endif // TextCheckingHelper_h
    106