ext/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 #ifdef SCI_NAMESPACE
  25 using namespace Scintilla;
  26 #endif
  27
  28 static inline bool IsAWordChar(const int  ch) {
  29         return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_' || ch == '$' || ch == ':');
  30 }
  31
  32 static inline bool IsAWordStart(const int ch) {
  33         return (ch < 0x80) && (isalnum(ch) || ch == '_');
  34 }
  35
  36 static void ColouriseBaanDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
  37                             Accessor &styler) {
  38
  39         WordList &keywords = *keywordlists[0];
  40         WordList &keywords2 = *keywordlists[1];
  41         bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor") != 0;
  42
  43         if (initStyle == SCE_BAAN_STRINGEOL)    // Does not leak onto next line
  44                 initStyle = SCE_BAAN_DEFAULT;
  45
  46         int visibleChars = 0;
  47
  48         StyleContext sc(startPos, length, initStyle, styler);
  49
  50         for (; sc.More(); sc.Forward()) {
  51
  52                 if (sc.state == SCE_BAAN_OPERATOR) {
  53                         sc.SetState(SCE_BAAN_DEFAULT);
  54                 } else if (sc.state == SCE_BAAN_NUMBER) {
  55                         if (!IsAWordChar(sc.ch)) {
  56                                 sc.SetState(SCE_BAAN_DEFAULT);
  57                         }
  58                 } else if (sc.state == SCE_BAAN_IDENTIFIER) {
  59                         if (!IsAWordChar(sc.ch)) {
  60                                 char s[100];
  61                                 sc.GetCurrentLowered(s, sizeof(s));
  62                                 if (keywords.InList(s)) {
  63                                         sc.ChangeState(SCE_BAAN_WORD);
  64                                 } else if (keywords2.InList(s)) {
  65                                         sc.ChangeState(SCE_BAAN_WORD2);
  66                                 }
  67                                 sc.SetState(SCE_BAAN_DEFAULT);
  68                         }
  69                 } else if (sc.state == SCE_BAAN_PREPROCESSOR) {
  70                         if (stylingWithinPreprocessor) {
  71                                 if (IsASpace(sc.ch)) {
  72                                         sc.SetState(SCE_BAAN_DEFAULT);
  73                                 }
  74                         } else {
  75                                 if (sc.atLineEnd && (sc.chNext != '^')) {
  76                                         sc.SetState(SCE_BAAN_DEFAULT);
  77                                 }
  78                         }
  79                 } else if (sc.state == SCE_BAAN_COMMENT) {
  80                         if (sc.atLineEnd) {
  81                                 sc.SetState(SCE_BAAN_DEFAULT);
  82                         }
  83                 } else if (sc.state == SCE_BAAN_COMMENTDOC) {
  84                         if (sc.MatchIgnoreCase("enddllusage")) {
  85                                 for (unsigned int i = 0; i < 10; i++){
  86                                         sc.Forward();
  87                                 }
  88                                 sc.ForwardSetState(SCE_BAAN_DEFAULT);
  89                         }
  90                 } else if (sc.state == SCE_BAAN_STRING) {
  91                         if (sc.ch == '\"') {
  92                                 sc.ForwardSetState(SCE_BAAN_DEFAULT);
  93                         } else if ((sc.atLineEnd) && (sc.chNext != '^')) {
  94                                 sc.ChangeState(SCE_BAAN_STRINGEOL);
  95                                 sc.ForwardSetState(SCE_C_DEFAULT);
  96                                 visibleChars = 0;
  97                         }
  98                 }
  99
 100                 if (sc.state == SCE_BAAN_DEFAULT) {
 101                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 102                                 sc.SetState(SCE_BAAN_NUMBER);
 103                         } else if (sc.MatchIgnoreCase("dllusage")){
 104                                         sc.SetState(SCE_BAAN_COMMENTDOC);
 105                                         do {
 106                                                 sc.Forward();
 107                                         } while ((!sc.atLineEnd) && sc.More());
 108                         } else if (IsAWordStart(sc.ch)) {
 109                                         sc.SetState(SCE_BAAN_IDENTIFIER);
 110                         } else if (sc.Match('|')){
 111                                         sc.SetState(SCE_BAAN_COMMENT);
 112                         } else if (sc.ch == '\"') {
 113                                 sc.SetState(SCE_BAAN_STRING);
 114                         } else if (sc.ch == '#' && visibleChars == 0) {
 115                                 // Preprocessor commands are alone on their line
 116                                 sc.SetState(SCE_BAAN_PREPROCESSOR);
 117                                 // Skip whitespace between # and preprocessor word
 118                                 do {
 119                                         sc.Forward();
 120                                 } while (IsASpace(sc.ch) && sc.More());
 121                         } else if (isoperator(static_cast<char>(sc.ch))) {
 122                                 sc.SetState(SCE_BAAN_OPERATOR);
 123                         }
 124                 }
 125                 if (sc.atLineEnd) {
 126                         // Reset states to begining of colourise so no surprises
 127                         // if different sets of lines lexed.
 128                         visibleChars = 0;
 129                 }
 130                 if (!IsASpace(sc.ch)) {
 131                         visibleChars++;
 132                 }
 133         }
 134         sc.Complete();
 135 }
 136
 137 static void FoldBaanDoc(unsigned int startPos, int length, int initStyle, WordList *[],
 138                             Accessor &styler) {
 139         bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
 140         bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 141         unsigned int endPos = startPos + length;
 142         int visibleChars = 0;
 143         int lineCurrent = styler.GetLine(startPos);
 144         int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
 145         int levelCurrent = levelPrev;
 146         char chNext = styler[startPos];
 147         int styleNext = styler.StyleAt(startPos);
 148         int style = initStyle;
 149         for (unsigned int i = startPos; i < endPos; i++) {
 150                 char ch = chNext;
 151                 chNext = styler.SafeGetCharAt(i + 1);
 152                 int stylePrev = style;
 153                 style = styleNext;
 154                 styleNext = styler.StyleAt(i + 1);
 155                 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
 156                 if (foldComment &&
 157                         (style == SCE_BAAN_COMMENT || style == SCE_BAAN_COMMENTDOC)) {
 158                         if (style != stylePrev) {
 159                                 levelCurrent++;
 160                         } else if ((style != styleNext) && !atEOL) {
 161                                 // Comments don't end at end of line and the next character may be unstyled.
 162                                 levelCurrent--;
 163                         }
 164                 }
 165                 if (style == SCE_BAAN_OPERATOR) {
 166                         if (ch == '{') {
 167                                 levelCurrent++;
 168                         } else if (ch == '}') {
 169                                 levelCurrent--;
 170                         }
 171                 }
 172                 if (atEOL) {
 173                         int lev = levelPrev;
 174                         if (visibleChars == 0 && foldCompact)
 175                                 lev |= SC_FOLDLEVELWHITEFLAG;
 176                         if ((levelCurrent > levelPrev) && (visibleChars > 0))
 177                                 lev |= SC_FOLDLEVELHEADERFLAG;
 178                         if (lev != styler.LevelAt(lineCurrent)) {
 179                                 styler.SetLevel(lineCurrent, lev);
 180                         }
 181                         lineCurrent++;
 182                         levelPrev = levelCurrent;
 183                         visibleChars = 0;
 184                 }
 185                 if (!isspacechar(ch))
 186                         visibleChars++;
 187         }
 188         // Fill in the real level of the next line, keeping the current flags as they will be filled in later
 189         int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
 190         styler.SetLevel(lineCurrent, levelPrev | flagsNext);
 191 }
 192
 193 LexerModule lmBaan(SCLEX_BAAN, ColouriseBaanDoc, "baan", FoldBaanDoc);