vcl/inc/scrptrun.h

   1 /*
   2  *******************************************************************************
   3  *
   4  *   Copyright (c) 1995-2013 International Business Machines Corporation and others
   5  *
   6  *   All rights reserved.
   7  *
   8  *   Permission is hereby granted, free of charge, to any person obtaining a copy of
   9  *   this software and associated documentation files (the "Software"), to deal in
  10  *   the Software without restriction, including without limitation the rights to
  11  *   use, copy, modify, merge, publish, distribute, and/or sell copies of the
  12  *   Software, and to permit persons to whom the Software is furnished to do so,
  13  *   provided that the above copyright notice(s) and this permission notice appear
  14  *   in all copies of the Software and that both the above copyright notice(s) and
  15  *   this permission notice appear in supporting documentation.
  16  *
  17  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN
  20  *   NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE BE
  21  *   LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY
  22  *   DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  23  *   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  24  *   CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  25  *
  26  *   Except as contained in this notice, the name of a copyright holder shall not be
  27  *   used in advertising or otherwise to promote the sale, use or other dealings in
  28  *   this Software without prior written authorization of the copyright holder.
  29  *
  30  *******************************************************************************
  31  *   file name:  scrptrun.h
  32  *
  33  *   created on: 10/17/2001
  34  *   created by: Eric R. Mader
  35  */
  36
  37 #ifndef INCLUDED_VCL_INC_SCRPTRUN_H
  38 #define INCLUDED_VCL_INC_SCRPTRUN_H
  39
  40 #include <sal/config.h>
  41
  42 #include <unicode/uobject.h>
  43 #include <unicode/uscript.h>
  44 #include <vector>
  45
  46 namespace vcl
  47 {
  48 struct ParenStackEntry
  49 {
  50     int32_t pairIndex;
  51     UScriptCode scriptCode;
  52     ParenStackEntry()
  53         : pairIndex(0)
  54         , scriptCode(USCRIPT_INVALID_CODE)
  55     {
  56     }
  57 };
  58
  59 class ScriptRun final : public icu::UObject
  60 {
  61 public:
  62     ScriptRun(const UChar chars[], int32_t length);
  63
  64     void reset();
  65
  66     void reset(int32_t start, int32_t count);
  67
  68     void reset(const UChar chars[], int32_t start, int32_t length);
  69
  70     int32_t getScriptStart() const;
  71
  72     int32_t getScriptEnd() const;
  73
  74     UScriptCode getScriptCode() const;
  75
  76     UBool next();
  77
  78     /**
  79 s     * ICU "poor man's RTTI", returns a UClassID for the actual class.
  80      *
  81      * @stable ICU 2.2
  82      */
  83     virtual UClassID getDynamicClassID() const override { return getStaticClassID(); }
  84
  85     /**
  86      * ICU "poor man's RTTI", returns a UClassID for this class.
  87      *
  88      * @stable ICU 2.2
  89      */
  90     static UClassID getStaticClassID()
  91     {
  92         return static_cast<UClassID>(const_cast<char*>(&fgClassID));
  93     }
  94
  95 private:
  96     int32_t charStart;
  97     int32_t charLimit;
  98     const UChar* charArray;
  99
 100     int32_t scriptStart;
 101     int32_t scriptEnd;
 102     UScriptCode scriptCode;
 103
 104     std::vector<ParenStackEntry> parenStack;
 105     int32_t parenSP;
 106
 107     /**
 108      * The address of this static class variable serves as this class's ID
 109      * for ICU "poor man's RTTI".
 110      */
 111     static const char fgClassID;
 112 };
 113
 114 inline ScriptRun::ScriptRun(const UChar chars[], int32_t length) { reset(chars, 0, length); }
 115
 116 inline int32_t ScriptRun::getScriptStart() const { return scriptStart; }
 117
 118 inline int32_t ScriptRun::getScriptEnd() const { return scriptEnd; }
 119
 120 inline UScriptCode ScriptRun::getScriptCode() const { return scriptCode; }
 121
 122 inline void ScriptRun::reset()
 123 {
 124     scriptStart = charStart;
 125     scriptEnd = charStart;
 126     scriptCode = USCRIPT_INVALID_CODE;
 127     parenSP = -1;
 128     parenStack.resize(128);
 129 }
 130
 131 inline void ScriptRun::reset(int32_t start, int32_t length)
 132 {
 133     charStart = start;
 134     charLimit = start + length;
 135
 136     reset();
 137 }
 138
 139 inline void ScriptRun::reset(const UChar chars[], int32_t start, int32_t length)
 140 {
 141     charArray = chars;
 142
 143     reset(start, length);
 144 }
 145 }
 146
 147 #endif