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      1 /*
      2  * Copyright (c) 2011 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef TextChecking_h
     32 #define TextChecking_h
     33 
     34 #include "platform/heap/Handle.h"
     35 #include "platform/text/TextDecoration.h"
     36 #include "wtf/RefCounted.h"
     37 #include "wtf/Vector.h"
     38 #include "wtf/text/WTFString.h"
     39 
     40 namespace blink {
     41 
     42 enum TextCheckingType {
     43     TextCheckingTypeNone     = 0,
     44     TextCheckingTypeSpelling = 1 << 1,
     45     TextCheckingTypeGrammar  = 1 << 2,
     46 };
     47 
     48 typedef unsigned TextCheckingTypeMask;
     49 
     50 enum TextCheckingProcessType {
     51     TextCheckingProcessBatch,
     52     TextCheckingProcessIncremental
     53 };
     54 
     55 struct GrammarDetail {
     56     int location;
     57     int length;
     58     Vector<String> guesses;
     59     String userDescription;
     60 };
     61 
     62 struct TextCheckingResult {
     63     TextDecorationType decoration;
     64     int location;
     65     int length;
     66     Vector<GrammarDetail> details;
     67     String replacement;
     68     uint32_t hash;
     69 };
     70 
     71 const int unrequestedTextCheckingSequence = -1;
     72 
     73 class TextCheckingRequestData {
     74     friend class SpellCheckRequest; // For access to m_sequence.
     75 public:
     76     TextCheckingRequestData()
     77         : m_sequence(unrequestedTextCheckingSequence)
     78         , m_mask(TextCheckingTypeNone)
     79         , m_processType(TextCheckingProcessIncremental)
     80     { }
     81     TextCheckingRequestData(int sequence, const String& text, TextCheckingTypeMask mask, TextCheckingProcessType processType, const Vector<uint32_t>& markers, const Vector<unsigned>& offsets)
     82         : m_sequence(sequence)
     83         , m_text(text)
     84         , m_mask(mask)
     85         , m_processType(processType)
     86         , m_markers(markers)
     87         , m_offsets(offsets)
     88     { }
     89 
     90     int sequence() const { return m_sequence; }
     91     String text() const { return m_text; }
     92     TextCheckingTypeMask mask() const { return m_mask; }
     93     bool maskContains(TextCheckingType type) const { return m_mask & type; }
     94     TextCheckingProcessType processType() const { return m_processType; }
     95     const Vector<uint32_t>& markers() const { return m_markers; }
     96     const Vector<unsigned>& offsets() const { return m_offsets; }
     97 
     98 private:
     99     int m_sequence;
    100     String m_text;
    101     TextCheckingTypeMask m_mask;
    102     TextCheckingProcessType m_processType;
    103     Vector<uint32_t> m_markers;
    104     Vector<unsigned> m_offsets;
    105 };
    106 
    107 class TextCheckingRequest : public RefCountedWillBeGarbageCollectedFinalized<TextCheckingRequest> {
    108 public:
    109     virtual ~TextCheckingRequest() { }
    110     virtual void trace(Visitor*) { }
    111 
    112     virtual const TextCheckingRequestData& data() const = 0;
    113     virtual void didSucceed(const Vector<TextCheckingResult>&) = 0;
    114     virtual void didCancel() = 0;
    115 };
    116 
    117 }
    118 
    119 #endif // TextChecking_h
    120