vcl/generic/glyphs/scrptrun.h

   1 /*
   2  *******************************************************************************
   3  *
   4  *   Copyright (c) 1995-2013 International Business Machines Corporation and others
   5  *
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  10  *   the Software without restriction, including without limitation the rights to
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  13  *   provided that the above copyright notice(s) and this permission notice appear
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  23  *   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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  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_GENERIC_GLYPHS_SCRPTRUN_H
  38 #define INCLUDED_VCL_GENERIC_GLYPHS_SCRPTRUN_H
  39
  40 #include <sal/config.h>
  41
  42 #include <sal/types.h>
  43 #include "unicode/utypes.h"
  44 #include "unicode/uobject.h"
  45 #include "unicode/uscript.h"
  46 #include <vector>
  47
  48 namespace vcl {
  49
  50 struct ScriptRecord
  51 {
  52     UChar32 startChar;
  53     UChar32 endChar;
  54     UScriptCode scriptCode;
  55 };
  56
  57 struct ParenStackEntry
  58 {
  59     int32_t pairIndex;
  60     UScriptCode scriptCode;
  61     ParenStackEntry()
  62       : pairIndex(0)
  63       , scriptCode(USCRIPT_INVALID_CODE)
  64     {
  65     }
  66 };
  67
  68 class ScriptRun : public UObject {
  69 public:
  70     ScriptRun();
  71
  72     ScriptRun(const UChar chars[], int32_t length);
  73
  74     ScriptRun(const UChar chars[], int32_t start, int32_t length);
  75
  76     void reset();
  77
  78     void reset(int32_t start, int32_t count);
  79
  80     void reset(const UChar chars[], int32_t start, int32_t length);
  81
  82     int32_t getScriptStart();
  83
  84     int32_t getScriptEnd();
  85
  86     UScriptCode getScriptCode();
  87
  88     UBool next();
  89
  90     /**
  91      * ICU "poor man's RTTI", returns a UClassID for the actual class.
  92      *
  93      * @stable ICU 2.2
  94      */
  95     virtual inline UClassID getDynamicClassID() const SAL_OVERRIDE { return getStaticClassID(); }
  96
  97     /**
  98      * ICU "poor man's RTTI", returns a UClassID for this class.
  99      *
 100      * @stable ICU 2.2
 101      */
 102     static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
 103
 104 private:
 105
 106     int32_t charStart;
 107     int32_t charLimit;
 108     const UChar *charArray;
 109
 110     int32_t scriptStart;
 111     int32_t scriptEnd;
 112     UScriptCode scriptCode;
 113
 114     std::vector<ParenStackEntry> parenStack;
 115     int32_t parenSP;
 116
 117     /**
 118      * The address of this static class variable serves as this class's ID
 119      * for ICU "poor man's RTTI".
 120      */
 121     static const char fgClassID;
 122 };
 123
 124 inline ScriptRun::ScriptRun()
 125 {
 126     reset(NULL, 0, 0);
 127 }
 128
 129 inline ScriptRun::ScriptRun(const UChar chars[], int32_t length)
 130 {
 131     reset(chars, 0, length);
 132 }
 133
 134 inline ScriptRun::ScriptRun(const UChar chars[], int32_t start, int32_t length)
 135 {
 136     reset(chars, start, length);
 137 }
 138
 139 inline int32_t ScriptRun::getScriptStart()
 140 {
 141     return scriptStart;
 142 }
 143
 144 inline int32_t ScriptRun::getScriptEnd()
 145 {
 146     return scriptEnd;
 147 }
 148
 149 inline UScriptCode ScriptRun::getScriptCode()
 150 {
 151     return scriptCode;
 152 }
 153
 154 inline void ScriptRun::reset()
 155 {
 156     scriptStart = charStart;
 157     scriptEnd   = charStart;
 158     scriptCode  = USCRIPT_INVALID_CODE;
 159     parenSP     = -1;
 160     parenStack.resize(128);
 161 }
 162
 163 inline void ScriptRun::reset(int32_t start, int32_t length)
 164 {
 165     charStart = start;
 166     charLimit = start + length;
 167
 168     reset();
 169 }
 170
 171 inline void ScriptRun::reset(const UChar chars[], int32_t start, int32_t length)
 172 {
 173     charArray = chars;
 174
 175     reset(start, length);
 176 }
 177
 178 }
 179
 180 #endif