src/stc/scintilla/src/LexBaan.cxx

   1 // Scintilla source code edit control
   2 /** @file LexBaan.cxx
   3  ** Lexer for Baan.
   4  ** Based heavily on LexCPP.cxx
   5  **/
   6 // Copyright 2001- by Vamsi Potluru <vamsi@who.net> & Praveen Ambekar <ambekarpraveen@yahoo.com>
   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 <ctype.h>
  12 #include <stdio.h>
  13 #include <stdarg.h>
  14
  15 #include "Platform.h"
  16
  17 #include "PropSet.h"
  18 #include "Accessor.h"
  19 #include "StyleContext.h"
  20 #include "KeyWords.h"
  21 #include "Scintilla.h"
  22 #include "SciLexer.h"
  23
  24 static inline bool IsAWordChar(const int  ch) {
  25         return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_' || ch == '$' || ch == ':');
  26 }
  27
  28 static inline bool IsAWordStart(const int ch) {
  29         return (ch < 0x80) && (isalnum(ch) || ch == '_');
  30 }
  31
  32 static void ColouriseBaanDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
  33                             Accessor &styler) {
  34
  35         WordList &keywords = *keywordlists[0];
  36         WordList &keywords2 = *keywordlists[1];
  37         bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor") != 0;
  38
  39         if (initStyle == SCE_BAAN_STRINGEOL)    // Does not leak onto next line
  40                 initStyle = SCE_BAAN_DEFAULT;
  41
  42         int visibleChars = 0;
  43
  44         StyleContext sc(startPos, length, initStyle, styler);
  45
  46         for (; sc.More(); sc.Forward()) {
  47
  48                 if (sc.state == SCE_BAAN_OPERATOR) {
  49                         sc.SetState(SCE_BAAN_DEFAULT);
  50                 } else if (sc.state == SCE_BAAN_NUMBER) {
  51                         if (!IsAWordChar(sc.ch)) {
  52                                 sc.SetState(SCE_BAAN_DEFAULT);
  53                         }
  54                 } else if (sc.state == SCE_BAAN_IDENTIFIER) {
  55                         if (!IsAWordChar(sc.ch)) {
  56                                 char s[100];
  57                                 sc.GetCurrentLowered(s, sizeof(s));
  58                                 if (keywords.InList(s)) {
  59                                         sc.ChangeState(SCE_BAAN_WORD);
  60                                 } else if (keywords2.InList(s)) {
  61                                         sc.ChangeState(SCE_BAAN_WORD2);
  62                                 }
  63                                 sc.SetState(SCE_BAAN_DEFAULT);
  64                         }
  65                 } else if (sc.state == SCE_BAAN_PREPROCESSOR) {
  66                         if (stylingWithinPreprocessor) {
  67                                 if (IsASpace(sc.ch)) {
  68                                         sc.SetState(SCE_BAAN_DEFAULT);
  69                                 }
  70                         } else {
  71                                 if (sc.atLineEnd && (sc.chNext != '^')) {
  72                                         sc.SetState(SCE_BAAN_DEFAULT);
  73                                 }
  74                         }
  75                 } else if (sc.state == SCE_BAAN_COMMENT) {
  76                         if (sc.atLineEnd) {
  77                                 sc.SetState(SCE_BAAN_DEFAULT);
  78                         }
  79                 } else if (sc.state == SCE_BAAN_COMMENTDOC) {
  80                         if (sc.MatchIgnoreCase("enddllusage")) {
  81                                 for (unsigned int i = 0; i < 10; i++){
  82                                         sc.Forward();
  83                                 }
  84                                 sc.ForwardSetState(SCE_BAAN_DEFAULT);
  85                         }
  86                 } else if (sc.state == SCE_BAAN_STRING) {
  87                         if (sc.ch == '\"') {
  88                                 sc.ForwardSetState(SCE_BAAN_DEFAULT);
  89                         } else if ((sc.atLineEnd) && (sc.chNext != '^')) {
  90                                 sc.ChangeState(SCE_BAAN_STRINGEOL);
  91                                 sc.ForwardSetState(SCE_C_DEFAULT);
  92                                 visibleChars = 0;
  93                         }
  94                 }
  95
  96                 if (sc.state == SCE_BAAN_DEFAULT) {
  97                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
  98                                 sc.SetState(SCE_BAAN_NUMBER);
  99                         } else if (sc.MatchIgnoreCase("dllusage")){
 100                                         sc.SetState(SCE_BAAN_COMMENTDOC);
 101                                         do {
 102                                                 sc.Forward();
 103                                         } while ((!sc.atLineEnd) && sc.More());
 104                         } else if (IsAWordStart(sc.ch)) {
 105                                         sc.SetState(SCE_BAAN_IDENTIFIER);
 106                         } else if (sc.Match('|')){
 107                                         sc.SetState(SCE_BAAN_COMMENT);
 108                         } else if (sc.ch == '\"') {
 109                                 sc.SetState(SCE_BAAN_STRING);
 110                         } else if (sc.ch == '#' && visibleChars == 0) {
 111                                 // Preprocessor commands are alone on their line
 112                                 sc.SetState(SCE_BAAN_PREPROCESSOR);
 113                                 // Skip whitespace between # and preprocessor word
 114                                 do {
 115                                         sc.Forward();
 116                                 } while (IsASpace(sc.ch) && sc.More());
 117                         } else if (isoperator(static_cast<char>(sc.ch))) {
 118                                 sc.SetState(SCE_BAAN_OPERATOR);
 119                         }
 120                 }
 121                 if (sc.atLineEnd) {
 122                         // Reset states to begining of colourise so no surprises
 123                         // if different sets of lines lexed.
 124                         visibleChars = 0;
 125                 }
 126                 if (!IsASpace(sc.ch)) {
 127                         visibleChars++;
 128                 }
 129         }
 130         sc.Complete();
 131 }
 132
 133 static void FoldBaanDoc(unsigned int startPos, int length, int initStyle, WordList *[],
 134                             Accessor &styler) {
 135         bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
 136         bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 137         unsigned int endPos = startPos + length;
 138         int visibleChars = 0;
 139         int lineCurrent = styler.GetLine(startPos);
 140         int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
 141         int levelCurrent = levelPrev;
 142         char chNext = styler[startPos];
 143         int styleNext = styler.StyleAt(startPos);
 144         int style = initStyle;
 145         for (unsigned int i = startPos; i < endPos; i++) {
 146                 char ch = chNext;
 147                 chNext = styler.SafeGetCharAt(i + 1);
 148                 int stylePrev = style;
 149                 style = styleNext;
 150                 styleNext = styler.StyleAt(i + 1);
 151                 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
 152                 if (foldComment &&
 153                         (style == SCE_BAAN_COMMENT || style == SCE_BAAN_COMMENTDOC)) {
 154                         if (style != stylePrev) {
 155                                 levelCurrent++;
 156                         } else if ((style != styleNext) && !atEOL) {
 157                                 // Comments don't end at end of line and the next character may be unstyled.
 158                                 levelCurrent--;
 159                         }
 160                 }
 161                 if (style == SCE_BAAN_OPERATOR) {
 162                         if (ch == '{') {
 163                                 levelCurrent++;
 164                         } else if (ch == '}') {
 165                                 levelCurrent--;
 166                         }
 167                 }
 168                 if (atEOL) {
 169                         int lev = levelPrev;
 170                         if (visibleChars == 0 && foldCompact)
 171                                 lev |= SC_FOLDLEVELWHITEFLAG;
 172                         if ((levelCurrent > levelPrev) && (visibleChars > 0))
 173                                 lev |= SC_FOLDLEVELHEADERFLAG;
 174                         if (lev != styler.LevelAt(lineCurrent)) {
 175                                 styler.SetLevel(lineCurrent, lev);
 176                         }
 177                         lineCurrent++;
 178                         levelPrev = levelCurrent;
 179                         visibleChars = 0;
 180                 }
 181                 if (!isspacechar(ch))
 182                         visibleChars++;
 183         }
 184         // Fill in the real level of the next line, keeping the current flags as they will be filled in later
 185         int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
 186         styler.SetLevel(lineCurrent, levelPrev | flagsNext);
 187 }
 188
 189 LexerModule lmBaan(SCLEX_BAAN, ColouriseBaanDoc, "baan", FoldBaanDoc);