src/stc/scintilla/lexers/LexBullant.cxx

   1 // SciTE - Scintilla based Text Editor
   2 // LexBullant.cxx - lexer for Bullant
   3
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <stdio.h>
   7 #include <stdarg.h>
   8 #include <assert.h>
   9 #include <ctype.h>
  10
  11 #include "ILexer.h"
  12 #include "Scintilla.h"
  13 #include "SciLexer.h"
  14
  15 #include "WordList.h"
  16 #include "LexAccessor.h"
  17 #include "Accessor.h"
  18 #include "StyleContext.h"
  19 #include "CharacterSet.h"
  20 #include "LexerModule.h"
  21
  22 #ifdef SCI_NAMESPACE
  23 using namespace Scintilla;
  24 #endif
  25
  26 static int classifyWordBullant(unsigned int start, unsigned int end, WordList &keywords, Accessor &styler) {
  27         char s[100];
  28         s[0] = '\0';
  29         for (unsigned int i = 0; i < end - start + 1 && i < 30; i++) {
  30                 s[i] = static_cast<char>(tolower(styler[start + i]));
  31                 s[i + 1] = '\0';
  32         }
  33         int lev= 0;
  34         char chAttr = SCE_C_IDENTIFIER;
  35         if (isdigit(s[0]) || (s[0] == '.')){
  36                 chAttr = SCE_C_NUMBER;
  37         }
  38         else {
  39                 if (keywords.InList(s)) {
  40                         chAttr = SCE_C_WORD;
  41                         if (strcmp(s, "end") == 0)
  42                                 lev = -1;
  43                         else if (strcmp(s, "method") == 0 ||
  44                                 strcmp(s, "case") == 0 ||
  45                                 strcmp(s, "class") == 0 ||
  46                                 strcmp(s, "debug") == 0 ||
  47                                 strcmp(s, "test") == 0 ||
  48                                 strcmp(s, "if") == 0 ||
  49                                 strcmp(s, "lock") == 0 ||
  50                                 strcmp(s, "transaction") == 0 ||
  51                                 strcmp(s, "trap") == 0 ||
  52                                 strcmp(s, "until") == 0 ||
  53                                 strcmp(s, "while") == 0)
  54                                 lev = 1;
  55                 }
  56         }
  57         styler.ColourTo(end, chAttr);
  58         return lev;
  59 }
  60
  61 static void ColouriseBullantDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
  62         Accessor &styler) {
  63         WordList &keywords = *keywordlists[0];
  64
  65         styler.StartAt(startPos);
  66
  67         bool fold = styler.GetPropertyInt("fold") != 0;
  68         int lineCurrent = styler.GetLine(startPos);
  69         int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
  70         int levelCurrent = levelPrev;
  71
  72         int state = initStyle;
  73         if (state == SCE_C_STRINGEOL)   // Does not leak onto next line
  74                 state = SCE_C_DEFAULT;
  75         char chPrev = ' ';
  76         char chNext = styler[startPos];
  77         unsigned int lengthDoc = startPos + length;
  78         int visibleChars = 0;
  79         styler.StartSegment(startPos);
  80         int endFoundThisLine = 0;
  81         for (unsigned int i = startPos; i < lengthDoc; i++) {
  82                 char ch = chNext;
  83                 chNext = styler.SafeGetCharAt(i + 1);
  84
  85                 if ((ch == '\r' && chNext != '\n') || (ch == '\n')) {
  86                         // Trigger on CR only (Mac style) or either on LF from CR+LF (Dos/Win) or on LF alone (Unix)
  87                         // Avoid triggering two times on Dos/Win
  88                         // End of line
  89                         endFoundThisLine = 0;
  90                         if (state == SCE_C_STRINGEOL) {
  91                                 styler.ColourTo(i, state);
  92                                 state = SCE_C_DEFAULT;
  93                         }
  94                         if (fold) {
  95                                 int lev = levelPrev;
  96                                 if (visibleChars == 0)
  97                                         lev |= SC_FOLDLEVELWHITEFLAG;
  98                                 if ((levelCurrent > levelPrev) && (visibleChars > 0))
  99                                         lev |= SC_FOLDLEVELHEADERFLAG;
 100                                 styler.SetLevel(lineCurrent, lev);
 101                                 lineCurrent++;
 102                                 levelPrev = levelCurrent;
 103                         }
 104                         visibleChars = 0;
 105
 106 /*                      int indentBlock = GetLineIndentation(lineCurrent);
 107                         if (blockChange==1){
 108                                 lineCurrent++;
 109                                 int pos=SetLineIndentation(lineCurrent, indentBlock + indentSize);
 110                         } else if (blockChange==-1) {
 111                                 indentBlock -= indentSize;
 112                                 if (indentBlock < 0)
 113                                         indentBlock = 0;
 114                                 SetLineIndentation(lineCurrent, indentBlock);
 115                                 lineCurrent++;
 116                         }
 117                         blockChange=0;
 118 */              }
 119                 if (!(isascii(ch) && isspace(ch)))
 120                         visibleChars++;
 121
 122                 if (styler.IsLeadByte(ch)) {
 123                         chNext = styler.SafeGetCharAt(i + 2);
 124                         chPrev = ' ';
 125                         i += 1;
 126                         continue;
 127                 }
 128
 129                 if (state == SCE_C_DEFAULT) {
 130                         if (iswordstart(ch)) {
 131                                 styler.ColourTo(i-1, state);
 132                                         state = SCE_C_IDENTIFIER;
 133                         } else if (ch == '@' && chNext == 'o') {
 134                                 if ((styler.SafeGetCharAt(i+2) =='f') && (styler.SafeGetCharAt(i+3) == 'f')) {
 135                                         styler.ColourTo(i-1, state);
 136                                         state = SCE_C_COMMENT;
 137                                 }
 138                         } else if (ch == '#') {
 139                                 styler.ColourTo(i-1, state);
 140                                 state = SCE_C_COMMENTLINE;
 141                         } else if (ch == '\"') {
 142                                 styler.ColourTo(i-1, state);
 143                                 state = SCE_C_STRING;
 144                         } else if (ch == '\'') {
 145                                 styler.ColourTo(i-1, state);
 146                                 state = SCE_C_CHARACTER;
 147                         } else if (isoperator(ch)) {
 148                                 styler.ColourTo(i-1, state);
 149                                 styler.ColourTo(i, SCE_C_OPERATOR);
 150                         }
 151                 } else if (state == SCE_C_IDENTIFIER) {
 152                         if (!iswordchar(ch)) {
 153                                 int levelChange = classifyWordBullant(styler.GetStartSegment(), i - 1, keywords, styler);
 154                                 state = SCE_C_DEFAULT;
 155                                 chNext = styler.SafeGetCharAt(i + 1);
 156                                 if (ch == '#') {
 157                                         state = SCE_C_COMMENTLINE;
 158                                 } else if (ch == '\"') {
 159                                         state = SCE_C_STRING;
 160                                 } else if (ch == '\'') {
 161                                         state = SCE_C_CHARACTER;
 162                                 } else if (isoperator(ch)) {
 163                                         styler.ColourTo(i, SCE_C_OPERATOR);
 164                                 }
 165                                 if (endFoundThisLine == 0)
 166                                         levelCurrent+=levelChange;
 167                                 if (levelChange == -1)
 168                                         endFoundThisLine=1;
 169                         }
 170                 } else if (state == SCE_C_COMMENT) {
 171                         if (ch == '@' && chNext == 'o') {
 172                                 if (styler.SafeGetCharAt(i+2) == 'n') {
 173                                         styler.ColourTo(i+2, state);
 174                                         state = SCE_C_DEFAULT;
 175                                         i+=2;
 176                                 }
 177                         }
 178                 } else if (state == SCE_C_COMMENTLINE) {
 179                         if (ch == '\r' || ch == '\n') {
 180                                 endFoundThisLine = 0;
 181                                 styler.ColourTo(i-1, state);
 182                                 state = SCE_C_DEFAULT;
 183                         }
 184                 } else if (state == SCE_C_STRING) {
 185                         if (ch == '\\') {
 186                                 if (chNext == '\"' || chNext == '\'' || chNext == '\\') {
 187                                         i++;
 188                                         ch = chNext;
 189                                         chNext = styler.SafeGetCharAt(i + 1);
 190                                 }
 191                         } else if (ch == '\"') {
 192                                 styler.ColourTo(i, state);
 193                                 state = SCE_C_DEFAULT;
 194                         } else if (chNext == '\r' || chNext == '\n') {
 195                                 endFoundThisLine = 0;
 196                                 styler.ColourTo(i-1, SCE_C_STRINGEOL);
 197                                 state = SCE_C_STRINGEOL;
 198                         }
 199                 } else if (state == SCE_C_CHARACTER) {
 200                         if ((ch == '\r' || ch == '\n') && (chPrev != '\\')) {
 201                                 endFoundThisLine = 0;
 202                                 styler.ColourTo(i-1, SCE_C_STRINGEOL);
 203                                 state = SCE_C_STRINGEOL;
 204                         } else if (ch == '\\') {
 205                                 if (chNext == '\"' || chNext == '\'' || chNext == '\\') {
 206                                         i++;
 207                                         ch = chNext;
 208                                         chNext = styler.SafeGetCharAt(i + 1);
 209                                 }
 210                         } else if (ch == '\'') {
 211                                 styler.ColourTo(i, state);
 212                                 state = SCE_C_DEFAULT;
 213                         }
 214                 }
 215                 chPrev = ch;
 216         }
 217         styler.ColourTo(lengthDoc - 1, state);
 218
 219         // Fill in the real level of the next line, keeping the current flags as they will be filled in later
 220         if (fold) {
 221                 int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
 222                 //styler.SetLevel(lineCurrent, levelCurrent | flagsNext);
 223                 styler.SetLevel(lineCurrent, levelPrev | flagsNext);
 224
 225         }
 226 }
 227
 228 static const char * const bullantWordListDesc[] = {
 229         "Keywords",
 230         0
 231 };
 232
 233 LexerModule lmBullant(SCLEX_BULLANT, ColouriseBullantDoc, "bullant", 0, bullantWordListDesc);