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Sourcecode: wxwindows2.4 version File versions

LexEScript.cxx

// Scintilla source code edit control
/** @file LexESCRIPT.cxx
 ** Lexer for ESCRIPT
 **/
// Copyright 2003 by Patrizio Bekerle (patrizio@bekerle.com)

#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 == '_');
}

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



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

      WordList &keywords = *keywordlists[0];
      WordList &keywords2 = *keywordlists[1];
      WordList &keywords3 = *keywordlists[2];

      // Do not leak onto next line
      /*if (initStyle == SCE_ESCRIPT_STRINGEOL)
            initStyle = SCE_ESCRIPT_DEFAULT;*/

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

      bool caseSensitive = styler.GetPropertyInt("escript.case.sensitive", 0) != 0;

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

            /*if (sc.atLineStart && (sc.state == SCE_ESCRIPT_STRING)) {
                  // Prevent SCE_ESCRIPT_STRINGEOL from leaking back to previous line
                  sc.SetState(SCE_ESCRIPT_STRING);
            }*/

            // Handle line continuation generically.
            if (sc.ch == '\\') {
                  if (sc.chNext == '\n' || sc.chNext == '\r') {
                        sc.Forward();
                        if (sc.ch == '\r' && sc.chNext == '\n') {
                              sc.Forward();
                        }
                        continue;
                  }
            }

            // Determine if the current state should terminate.
            if (sc.state == SCE_ESCRIPT_OPERATOR || sc.state == SCE_ESCRIPT_BRACE) {
                  sc.SetState(SCE_ESCRIPT_DEFAULT);
            } else if (sc.state == SCE_ESCRIPT_NUMBER) {
                  if (!IsADigit(sc.ch) || sc.ch != '.') {
                        sc.SetState(SCE_ESCRIPT_DEFAULT);
                  }
            } else if (sc.state == SCE_ESCRIPT_IDENTIFIER) {
                  if (!IsAWordChar(sc.ch) || (sc.ch == '.')) {
                        char s[100];
                        if (caseSensitive) {
                              sc.GetCurrent(s, sizeof(s));
                        } else {
                              sc.GetCurrentLowered(s, sizeof(s));
                        }

//                      sc.GetCurrentLowered(s, sizeof(s));

                                if (keywords.InList(s)) {
                              sc.ChangeState(SCE_ESCRIPT_WORD);
                        } else if (keywords2.InList(s)) {
                              sc.ChangeState(SCE_ESCRIPT_WORD2);
                        } else if (keywords3.InList(s)) {
                              sc.ChangeState(SCE_ESCRIPT_WORD3);
                                        // sc.state = SCE_ESCRIPT_IDENTIFIER;
                        }
                        sc.SetState(SCE_ESCRIPT_DEFAULT);
                  }
            } else if (sc.state == SCE_ESCRIPT_COMMENT) {
                  if (sc.Match('*', '/')) {
                        sc.Forward();
                        sc.ForwardSetState(SCE_ESCRIPT_DEFAULT);
                  }
            } else if (sc.state == SCE_ESCRIPT_COMMENTDOC) {
                  if (sc.Match('*', '/')) {
                        sc.Forward();
                        sc.ForwardSetState(SCE_ESCRIPT_DEFAULT);
                  }
            } else if (sc.state == SCE_ESCRIPT_COMMENTLINE) {
                  if (sc.atLineEnd) {
                        sc.SetState(SCE_ESCRIPT_DEFAULT);
                  }
            } else if (sc.state == SCE_ESCRIPT_STRING) {
                  if (sc.ch == '\\') {
                        if (sc.chNext == '\"' || sc.chNext == '\\') {
                              sc.Forward();
                        }
                  } else if (sc.ch == '\"') {
                        sc.ForwardSetState(SCE_ESCRIPT_DEFAULT);
                  }
            }

            // Determine if a new state should be entered.
            if (sc.state == SCE_ESCRIPT_DEFAULT) {
                  if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
                        sc.SetState(SCE_ESCRIPT_NUMBER);
                  } else if (IsAWordStart(sc.ch) || (sc.ch == '#')) {
                        sc.SetState(SCE_ESCRIPT_IDENTIFIER);
                  } else if (sc.Match('/', '*')) {
                        sc.SetState(SCE_ESCRIPT_COMMENT);
                        sc.Forward();     // Eat the * so it isn't used for the end of the comment
                  } else if (sc.Match('/', '/')) {
                        sc.SetState(SCE_ESCRIPT_COMMENTLINE);
                  } else if (sc.ch == '\"') {
                        sc.SetState(SCE_ESCRIPT_STRING);
                        //} else if (isoperator(static_cast<char>(sc.ch))) {
                  } else if (sc.ch == '+' || sc.ch == '-' || sc.ch == '*' || sc.ch == '/' || sc.ch == '=' || sc.ch == '<' || sc.ch == '>' || sc.ch == '&' || sc.ch == '|' || sc.ch == '!' || sc.ch == '?' || sc.ch == ':') {
                        sc.SetState(SCE_ESCRIPT_OPERATOR);
                  } else if (sc.ch == '{' || sc.ch == '}') {
                        sc.SetState(SCE_ESCRIPT_BRACE);
                  }
            }

      }
      sc.Complete();
}


static int classifyFoldPointESCRIPT(const char* s, const char* prevWord) {
      int lev = 0;
      if (strcmp(prevWord, "end") == 0) return lev;
      if ((strcmp(prevWord, "else") == 0 && strcmp(s, "if") == 0) || strcmp(s, "elseif") == 0)
            return -1;

        if (strcmp(s, "for") == 0 || strcmp(s, "foreach") == 0
          || strcmp(s, "program") == 0 || strcmp(s, "function") == 0
          || strcmp(s, "while") == 0 || strcmp(s, "case") == 0
          || strcmp(s, "if") == 0 ) {
            lev = 1;
      } else if ( strcmp(s, "endfor") == 0 || strcmp(s, "endforeach") == 0
          || strcmp(s, "endprogram") == 0 || strcmp(s, "endfunction") == 0
          || strcmp(s, "endwhile") == 0 || strcmp(s, "endcase") == 0
          || strcmp(s, "endif") == 0 ) {
            lev = -1;
      }

      return lev;
}


static bool IsStreamCommentStyle(int style) {
      return style == SCE_ESCRIPT_COMMENT ||
             style == SCE_ESCRIPT_COMMENTDOC ||
             style == SCE_ESCRIPT_COMMENTLINE;
}

static void FoldESCRIPTDoc(unsigned int startPos, int length, int initStyle, WordList *[], Accessor &styler) {
      //~ bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
      // Do not know how to fold the comment at the moment.
      bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
        bool foldComment = true;
      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;

      int lastStart = 0;
      char prevWord[32] = "";

      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 && IsStreamCommentStyle(style)) {
                  if (!IsStreamCommentStyle(stylePrev)) {
                        levelCurrent++;
                  } else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
                        // Comments don't end at end of line and the next character may be unstyled.
                        levelCurrent--;
                  }
            }

            if (foldComment && (style == SCE_ESCRIPT_COMMENTLINE)) {
                  if ((ch == '/') && (chNext == '/')) {
                        char chNext2 = styler.SafeGetCharAt(i + 2);
                        if (chNext2 == '{') {
                              levelCurrent++;
                        } else if (chNext2 == '}') {
                              levelCurrent--;
                        }
                  }
            }

            if (stylePrev == SCE_ESCRIPT_DEFAULT && style == SCE_ESCRIPT_WORD3)
            {
                  // Store last word start point.
                  lastStart = i;
            }

            if (style == SCE_ESCRIPT_WORD3) {
                  if(iswordchar(ch) && !iswordchar(chNext)) {
                        char s[32];
                        unsigned int j;
                        for(j = 0; ( j < 31 ) && ( j < i-lastStart+1 ); j++) {
                              s[j] = static_cast<char>(tolower(styler[lastStart + j]));
                        }
                        s[j] = '\0';
                        levelCurrent += classifyFoldPointESCRIPT(s, prevWord);
                        strcpy(prevWord, s);
                  }
            }
            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;
                  strcpy(prevWord, "");
            }

            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);
}



static const char * const ESCRIPTWordLists[] = {
      "Primary keywords and identifiers",
      "Intrinsic functions",
      "Extended and user defined functions",
      0,
};

LexerModule lmESCRIPT(SCLEX_ESCRIPT, ColouriseESCRIPTDoc, "escript", FoldESCRIPTDoc, ESCRIPTWordLists);

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