src/stc/scintilla/lexers/LexSML.cxx

   1 // Scintilla source code edit control
   2 /** @file LexSML.cxx
   3  ** Lexer for SML.
   4  **/
   5 // Copyright 2009 by James Moffatt and Yuzhou Xin
   6 // Modified from LexCaml.cxx by Robert Roessler <robertr@rftp.com> Copyright 2005
   7 // The License.txt file describes the conditions under which this software may be distributed.
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <stdio.h>
  12 #include <stdarg.h>
  13 #include <assert.h>
  14 #include <ctype.h>
  15
  16 #include "ILexer.h"
  17 #include "Scintilla.h"
  18 #include "SciLexer.h"
  19
  20 #include "WordList.h"
  21 #include "LexAccessor.h"
  22 #include "Accessor.h"
  23 #include "StyleContext.h"
  24 #include "CharacterSet.h"
  25 #include "LexerModule.h"
  26
  27 inline int  issml(int c) {return isalnum(c) || c == '_';}
  28 inline int issmlf(int c) {return isalpha(c) || c == '_';}
  29 inline int issmld(int c) {return isdigit(c) || c == '_';}
  30
  31
  32 #ifdef SCI_NAMESPACE
  33 using namespace Scintilla;
  34 #endif
  35
  36 void ColouriseSMLDoc(
  37         unsigned int startPos, int length,
  38         int initStyle,
  39         WordList *keywordlists[],
  40         Accessor &styler)
  41 {
  42         StyleContext sc(startPos, length, initStyle, styler);
  43         int nesting = 0;
  44         if (sc.state < SCE_SML_STRING)
  45                 sc.state = SCE_SML_DEFAULT;
  46         if (sc.state >= SCE_SML_COMMENT)
  47                 nesting = (sc.state & 0x0f) - SCE_SML_COMMENT;
  48
  49         int chBase = 0, chToken = 0, chLit = 0;
  50         WordList& keywords  = *keywordlists[0];
  51         WordList& keywords2 = *keywordlists[1];
  52         WordList& keywords3 = *keywordlists[2];
  53         const int useMagic = styler.GetPropertyInt("lexer.caml.magic", 0);
  54
  55         while (sc.More()) {
  56                 int state2 = -1;
  57                 int chColor = sc.currentPos - 1;
  58                 bool advance = true;
  59
  60                 switch (sc.state & 0x0f) {
  61                 case SCE_SML_DEFAULT:
  62                         chToken = sc.currentPos;
  63                         if (issmlf(sc.ch))
  64                                 state2 = SCE_SML_IDENTIFIER;
  65                         else if (sc.Match('`') && issmlf(sc.chNext))
  66                                 state2 = SCE_SML_TAGNAME;
  67                         else if (sc.Match('#')&&isdigit(sc.chNext))
  68                                         state2 = SCE_SML_LINENUM;
  69                         else if (sc.Match('#','\"')){
  70                                         state2 = SCE_SML_CHAR,chLit = 0;
  71                                         sc.Forward();
  72
  73                                 }
  74                         else if (isdigit(sc.ch)) {
  75                                 state2 = SCE_SML_NUMBER, chBase = 10;
  76                                 if (sc.Match('0') && strchr("xX", sc.chNext))
  77                                         chBase = 16, sc.Forward();}
  78                         else if (sc.Match('\"')&&sc.chPrev!='#')
  79                                 state2 = SCE_SML_STRING;
  80                         else if (sc.Match('(', '*')){
  81                                 state2 = SCE_SML_COMMENT,
  82                                         sc.ch = ' ',
  83                                         sc.Forward();}
  84                         else if (strchr("!~"
  85                                         "=<>@^+-*/"
  86                                         "()[];,:.#", sc.ch))
  87                                 state2 = SCE_SML_OPERATOR;
  88                         break;
  89
  90                 case SCE_SML_IDENTIFIER:
  91                         if (!(issml(sc.ch) || sc.Match('\''))) {
  92                                 const int n = sc.currentPos - chToken;
  93                                 if (n < 24) {
  94                                         char t[24];
  95                                         for (int i = -n; i < 0; i++)
  96                                                 t[n + i] = static_cast<char>(sc.GetRelative(i));
  97                                         t[n] = '\0';
  98                                         if ((n == 1 && sc.chPrev == '_') || keywords.InList(t))
  99                                                 sc.ChangeState(SCE_SML_KEYWORD);
 100                                         else if (keywords2.InList(t))
 101                                                 sc.ChangeState(SCE_SML_KEYWORD2);
 102                                         else if (keywords3.InList(t))
 103                                                 sc.ChangeState(SCE_SML_KEYWORD3);
 104                                 }
 105                                 state2 = SCE_SML_DEFAULT, advance = false;
 106                         }
 107                         break;
 108
 109                 case SCE_SML_TAGNAME:
 110                         if (!(issml(sc.ch) || sc.Match('\'')))
 111                                 state2 = SCE_SML_DEFAULT, advance = false;
 112                         break;
 113
 114                 case SCE_SML_LINENUM:
 115                         if (!isdigit(sc.ch))
 116                                 state2 = SCE_SML_DEFAULT, advance = false;
 117                         break;
 118
 119                 case SCE_SML_OPERATOR: {
 120                         const char* o = 0;
 121                         if (issml(sc.ch) || isspace(sc.ch)
 122                                 || (o = strchr(")]};,\'\"`#", sc.ch),o)
 123                                 || !strchr("!$%&*+-./:<=>?@^|~", sc.ch)) {
 124                                 if (o && strchr(")]};,", sc.ch)) {
 125                                         if ((sc.Match(')') && sc.chPrev == '(')
 126                                                 || (sc.Match(']') && sc.chPrev == '['))
 127                                                 sc.ChangeState(SCE_SML_KEYWORD);
 128                                         chColor++;
 129                                 } else
 130                                         advance = false;
 131                                 state2 = SCE_SML_DEFAULT;
 132                         }
 133                         break;
 134                 }
 135
 136                 case SCE_SML_NUMBER:
 137                         if (issmld(sc.ch) || IsADigit(sc.ch, chBase))
 138                                 break;
 139                         if ((sc.Match('l') || sc.Match('L') || sc.Match('n'))
 140                                 && (issmld(sc.chPrev) || IsADigit(sc.chPrev, chBase)))
 141                                 break;
 142                         if (chBase == 10) {
 143                                 if (sc.Match('.') && issmld(sc.chPrev))
 144                                         break;
 145                                 if ((sc.Match('e') || sc.Match('E'))
 146                                         && (issmld(sc.chPrev) || sc.chPrev == '.'))
 147                                         break;
 148                                 if ((sc.Match('+') || sc.Match('-'))
 149                                         && (sc.chPrev == 'e' || sc.chPrev == 'E'))
 150                                         break;
 151                         }
 152                         state2 = SCE_SML_DEFAULT, advance = false;
 153                         break;
 154
 155                 case SCE_SML_CHAR:
 156                         if (sc.Match('\\')) {
 157                                 chLit = 1;
 158                                 if (sc.chPrev == '\\')
 159                                         sc.ch = ' ';
 160                         } else if ((sc.Match('\"') && sc.chPrev != '\\') || sc.atLineEnd) {
 161                                 state2 = SCE_SML_DEFAULT;
 162                                 chLit = 1;
 163                                 if (sc.Match('\"'))
 164                                         chColor++;
 165                                 else
 166                                         sc.ChangeState(SCE_SML_IDENTIFIER);
 167                         } else if (chLit < 1 && sc.currentPos - chToken >= 3)
 168                                 sc.ChangeState(SCE_SML_IDENTIFIER), advance = false;
 169                         break;
 170
 171                 case SCE_SML_STRING:
 172                         if (sc.Match('\\') && sc.chPrev == '\\')
 173                                 sc.ch = ' ';
 174                         else if (sc.Match('\"') && sc.chPrev != '\\')
 175                                 state2 = SCE_SML_DEFAULT, chColor++;
 176                         break;
 177
 178                 case SCE_SML_COMMENT:
 179                 case SCE_SML_COMMENT1:
 180                 case SCE_SML_COMMENT2:
 181                 case SCE_SML_COMMENT3:
 182                         if (sc.Match('(', '*'))
 183                                 state2 = sc.state + 1, chToken = sc.currentPos,
 184                                         sc.ch = ' ',
 185                                         sc.Forward(), nesting++;
 186                         else if (sc.Match(')') && sc.chPrev == '*') {
 187                                 if (nesting)
 188                                         state2 = (sc.state & 0x0f) - 1, chToken = 0, nesting--;
 189                                 else
 190                                         state2 = SCE_SML_DEFAULT;
 191                                 chColor++;
 192                         } else if (useMagic && sc.currentPos - chToken == 4
 193                                 && sc.Match('c') && sc.chPrev == 'r' && sc.GetRelative(-2) == '@')
 194                                 sc.state |= 0x10;
 195                         break;
 196                 }
 197
 198                 if (state2 >= 0)
 199                         styler.ColourTo(chColor, sc.state), sc.ChangeState(state2);
 200                 if (advance)
 201                         sc.Forward();
 202         }
 203
 204         sc.Complete();
 205 }
 206
 207 void FoldSMLDoc(
 208         unsigned int, int,
 209         int,
 210         WordList *[],
 211         Accessor &)
 212 {
 213 }
 214
 215 static const char * const SMLWordListDesc[] = {
 216         "Keywords",
 217         "Keywords2",
 218         "Keywords3",
 219         0
 220 };
 221
 222 LexerModule lmSML(SCLEX_SML, ColouriseSMLDoc, "SML", FoldSMLDoc, SMLWordListDesc);
 223