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 <vcl/dllapi.h>
  43
  44 #include <unicode/uobject.h>
  45 #include <unicode/uscript.h>
  46 #include <vector>
  47
  48 namespace vcl
  49 {
  50 struct ParenStackEntry
  51 {
  52     int32_t pairIndex;
  53     UScriptCode scriptCode;
  54     ParenStackEntry()
  55         : pairIndex(0)
  56         , scriptCode(USCRIPT_INVALID_CODE)
  57     {
  58     }
  59 };
  60
  61 class VCL_DLLPUBLIC ScriptRun final : public icu::UObject
  62 {
  63 public:
  64     ScriptRun(const UChar chars[], int32_t length);
  65
  66     void reset();
  67
  68     void reset(int32_t start, int32_t count);
  69
  70     void reset(const UChar chars[], int32_t start, int32_t length);
  71
  72     int32_t getScriptStart() const;
  73
  74     int32_t getScriptEnd() const;
  75
  76     UScriptCode getScriptCode() const;
  77
  78     UBool next();
  79
  80     /**
  81 s     * ICU "poor man's RTTI", returns a UClassID for the actual class.
  82      *
  83      * @stable ICU 2.2
  84      */
  85     virtual UClassID getDynamicClassID() const override { return getStaticClassID(); }
  86
  87     /**
  88      * ICU "poor man's RTTI", returns a UClassID for this class.
  89      *
  90      * @stable ICU 2.2
  91      */
  92     static UClassID getStaticClassID()
  93     {
  94         return static_cast<UClassID>(const_cast<char*>(&fgClassID));
  95     }
  96
  97 private:
  98     int32_t charStart;
  99     int32_t charLimit;
 100     const UChar* charArray;
 101
 102     int32_t scriptStart;
 103     int32_t scriptEnd;
 104     UScriptCode scriptCode;
 105
 106     std::vector<ParenStackEntry> parenStack;
 107     int32_t parenSP;
 108
 109     /**
 110      * The address of this static class variable serves as this class's ID
 111      * for ICU "poor man's RTTI".
 112      */
 113     static const char fgClassID;
 114 };
 115
 116 inline ScriptRun::ScriptRun(const UChar chars[], int32_t length)
 117 {
 118     parenStack.reserve(128);
 119     reset(chars, 0, length);
 120 }
 121
 122 inline int32_t ScriptRun::getScriptStart() const { return scriptStart; }
 123
 124 inline int32_t ScriptRun::getScriptEnd() const { return scriptEnd; }
 125
 126 inline UScriptCode ScriptRun::getScriptCode() const { return scriptCode; }
 127
 128 inline void ScriptRun::reset()
 129 {
 130     scriptStart = charStart;
 131     scriptEnd = charStart;
 132     scriptCode = USCRIPT_INVALID_CODE;
 133     parenSP = -1;
 134     parenStack.clear();
 135 }
 136
 137 inline void ScriptRun::reset(int32_t start, int32_t length)
 138 {
 139     charStart = start;
 140     charLimit = start + length;
 141
 142     reset();
 143 }
 144
 145 inline void ScriptRun::reset(const UChar chars[], int32_t start, int32_t length)
 146 {
 147     charArray = chars;
 148
 149     reset(start, length);
 150 }
 151 }
 152
 153 #endif