vcl/inc/scrptrun.h

   1 /*
   2  *******************************************************************************
   3  *
   4  *   Copyright (c) 1995-2013 International Business Machines Corporation and others
   5  *
   6  *   All rights reserved.
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   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 : public icu::UObject {
  60 public:
  61
  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() { return static_cast<UClassID>(const_cast<char *>(&fgClassID)); }
  91
  92 private:
  93
  94     int32_t charStart;
  95     int32_t charLimit;
  96     const UChar *charArray;
  97
  98     int32_t scriptStart;
  99     int32_t scriptEnd;
 100     UScriptCode scriptCode;
 101
 102     std::vector<ParenStackEntry> parenStack;
 103     int32_t parenSP;
 104
 105     /**
 106      * The address of this static class variable serves as this class's ID
 107      * for ICU "poor man's RTTI".
 108      */
 109     static const char fgClassID;
 110 };
 111
 112 inline ScriptRun::ScriptRun(const UChar chars[], int32_t length)
 113 {
 114     reset(chars, 0, length);
 115 }
 116
 117 inline int32_t ScriptRun::getScriptStart() const
 118 {
 119     return scriptStart;
 120 }
 121
 122 inline int32_t ScriptRun::getScriptEnd() const
 123 {
 124     return scriptEnd;
 125 }
 126
 127 inline UScriptCode ScriptRun::getScriptCode() const
 128 {
 129     return scriptCode;
 130 }
 131
 132 inline void ScriptRun::reset()
 133 {
 134     scriptStart = charStart;
 135     scriptEnd   = charStart;
 136     scriptCode  = USCRIPT_INVALID_CODE;
 137     parenSP     = -1;
 138     parenStack.resize(128);
 139 }
 140
 141 inline void ScriptRun::reset(int32_t start, int32_t length)
 142 {
 143     charStart = start;
 144     charLimit = start + length;
 145
 146     reset();
 147 }
 148
 149 inline void ScriptRun::reset(const UChar chars[], int32_t start, int32_t length)
 150 {
 151     charArray = chars;
 152
 153     reset(start, length);
 154 }
 155
 156 }
 157
 158 #endif