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LexBaan.cxx

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// Scintilla source code edit control
/** @file LexBaan.cxx
 ** Lexer for Baan.
 ** Based heavily on LexCPP.cxx
 **/
// Copyright 2001- by Vamsi Potluru <vamsi@who.net> & Praveen Ambekar <ambekarpraveen@yahoo.com>
// The License.txt file describes the conditions under which this software may be distributed.

#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdarg.h>

#include "Platform.h"

#include "PropSet.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"

static inline bool IsAWordChar(const int  ch) {
      return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_' || ch == '$' || ch == ':');
}

static inline bool IsAWordStart(const int ch) {
      return (ch < 0x80) && (isalnum(ch) || ch == '_');
}

static void ColouriseBaanDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
                            Accessor &styler) {

      WordList &keywords = *keywordlists[0];
      WordList &keywords2 = *keywordlists[1];
      bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor") != 0;

      if (initStyle == SCE_BAAN_STRINGEOL)      // Does not leak onto next line
            initStyle = SCE_BAAN_DEFAULT;

      int visibleChars = 0;

      StyleContext sc(startPos, length, initStyle, styler);

      for (; sc.More(); sc.Forward()) {

            if (sc.state == SCE_BAAN_OPERATOR) {
                  sc.SetState(SCE_BAAN_DEFAULT);
            } else if (sc.state == SCE_BAAN_NUMBER) {
                  if (!IsAWordChar(sc.ch)) {
                        sc.SetState(SCE_BAAN_DEFAULT);
                  }
            } else if (sc.state == SCE_BAAN_IDENTIFIER) {
                  if (!IsAWordChar(sc.ch)) {
                        char s[100];
                        sc.GetCurrentLowered(s, sizeof(s));
                        if (keywords.InList(s)) {
                              sc.ChangeState(SCE_BAAN_WORD);
                        } else if (keywords2.InList(s)) {
                              sc.ChangeState(SCE_BAAN_WORD2);
                        }
                        sc.SetState(SCE_BAAN_DEFAULT);
                  }
            } else if (sc.state == SCE_BAAN_PREPROCESSOR) {
                  if (stylingWithinPreprocessor) {
                        if (IsASpace(sc.ch)) {
                              sc.SetState(SCE_BAAN_DEFAULT);
                        }
                  } else {
                        if (sc.atLineEnd && (sc.chNext != '^')) {
                              sc.SetState(SCE_BAAN_DEFAULT);
                        }
                  }
            } else if (sc.state == SCE_BAAN_COMMENT) {
                  if (sc.atLineEnd) {
                        sc.SetState(SCE_BAAN_DEFAULT);
                  }
            } else if (sc.state == SCE_BAAN_COMMENTDOC) {
                  if (sc.MatchIgnoreCase("enddllusage")) {
                        for (unsigned int i = 0; i < 10; i++){
                              sc.Forward();
                        }
                        sc.ForwardSetState(SCE_BAAN_DEFAULT);
                  }
            } else if (sc.state == SCE_BAAN_STRING) {
                  if (sc.ch == '\"') {
                        sc.ForwardSetState(SCE_BAAN_DEFAULT);
                  } else if ((sc.atLineEnd) && (sc.chNext != '^')) {
                        sc.ChangeState(SCE_BAAN_STRINGEOL);
                        sc.ForwardSetState(SCE_C_DEFAULT);
                        visibleChars = 0;
                  }
            }

            if (sc.state == SCE_BAAN_DEFAULT) {
                  if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
                        sc.SetState(SCE_BAAN_NUMBER);
                  } else if (sc.MatchIgnoreCase("dllusage")){
                              sc.SetState(SCE_BAAN_COMMENTDOC);
                              do {
                                    sc.Forward();
                              } while ((!sc.atLineEnd) && sc.More());
                  } else if (IsAWordStart(sc.ch)) {
                              sc.SetState(SCE_BAAN_IDENTIFIER);
                  } else if (sc.Match('|')){
                              sc.SetState(SCE_BAAN_COMMENT);
                  } else if (sc.ch == '\"') {
                        sc.SetState(SCE_BAAN_STRING);
                  } else if (sc.ch == '#' && visibleChars == 0) {
                        // Preprocessor commands are alone on their line
                        sc.SetState(SCE_BAAN_PREPROCESSOR);
                        // Skip whitespace between # and preprocessor word
                        do {
                              sc.Forward();
                        } while (IsASpace(sc.ch) && sc.More());
                  } else if (isoperator(static_cast<char>(sc.ch))) {
                        sc.SetState(SCE_BAAN_OPERATOR);
                  }
            }
            if (sc.atLineEnd) {
                  // Reset states to begining of colourise so no surprises
                  // if different sets of lines lexed.
                  visibleChars = 0;
            }
            if (!IsASpace(sc.ch)) {
                  visibleChars++;
            }
      }
      sc.Complete();
}

static void FoldBaanDoc(unsigned int startPos, int length, int initStyle, WordList *[],
                            Accessor &styler) {
      bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
      bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
      unsigned int endPos = startPos + length;
      int visibleChars = 0;
      int lineCurrent = styler.GetLine(startPos);
      int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
      int levelCurrent = levelPrev;
      char chNext = styler[startPos];
      int styleNext = styler.StyleAt(startPos);
      int style = initStyle;
      for (unsigned int i = startPos; i < endPos; i++) {
            char ch = chNext;
            chNext = styler.SafeGetCharAt(i + 1);
            int stylePrev = style;
            style = styleNext;
            styleNext = styler.StyleAt(i + 1);
            bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
            if (foldComment &&
                  (style == SCE_BAAN_COMMENT || style == SCE_BAAN_COMMENTDOC)) {
                  if (style != stylePrev) {
                        levelCurrent++;
                  } else if ((style != styleNext) && !atEOL) {
                        // Comments don't end at end of line and the next character may be unstyled.
                        levelCurrent--;
                  }
            }
            if (style == SCE_BAAN_OPERATOR) {
                  if (ch == '{') {
                        levelCurrent++;
                  } else if (ch == '}') {
                        levelCurrent--;
                  }
            }
            if (atEOL) {
                  int lev = levelPrev;
                  if (visibleChars == 0 && foldCompact)
                        lev |= SC_FOLDLEVELWHITEFLAG;
                  if ((levelCurrent > levelPrev) && (visibleChars > 0))
                        lev |= SC_FOLDLEVELHEADERFLAG;
                  if (lev != styler.LevelAt(lineCurrent)) {
                        styler.SetLevel(lineCurrent, lev);
                  }
                  lineCurrent++;
                  levelPrev = levelCurrent;
                  visibleChars = 0;
            }
            if (!isspacechar(ch))
                  visibleChars++;
      }
      // Fill in the real level of the next line, keeping the current flags as they will be filled in later
      int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
      styler.SetLevel(lineCurrent, levelPrev | flagsNext);
}

LexerModule lmBaan(SCLEX_BAAN, ColouriseBaanDoc, "baan", FoldBaanDoc);

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