src/stc/scintilla/src/LexAVE.cxx

   1 // SciTE - Scintilla based Text Editor
   2 /** @file LexAVE.cxx
   3  ** Lexer for Avenue.
   4  **
   5   ** Written by Alexey Yutkin <yutkin@geol.msu.ru>.
   6  **/
   7 // Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org>
   8 // The License.txt file describes the conditions under which this software may be distributed.
   9
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <ctype.h>
  13 #include <stdarg.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16
  17 #include "Platform.h"
  18
  19 #include "PropSet.h"
  20 #include "Accessor.h"
  21 #include "StyleContext.h"
  22 #include "KeyWords.h"
  23 #include "Scintilla.h"
  24 #include "SciLexer.h"
  25
  26
  27
  28 static inline bool IsAWordChar(const int ch) {
  29         return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
  30 }
  31 static inline bool IsEnumChar(const int ch) {
  32         return (ch < 0x80) && (isalnum(ch)|| ch == '_');
  33 }
  34 static inline bool IsANumberChar(const int ch) {
  35         return (ch < 0x80) && (isalnum(ch) || ch == '.' );
  36 }
  37
  38 inline bool IsAWordStart(const int ch) {
  39         return (ch < 0x80) && (isalnum(ch) || ch == '_');
  40 }
  41
  42 inline bool isAveOperator(char ch) {
  43         if (isalnum(ch))
  44                 return false;
  45         // '.' left out as it is used to make up numbers
  46         if (ch == '*' || ch == '/' || ch == '-' || ch == '+' ||
  47                 ch == '(' || ch == ')' || ch == '=' ||
  48                 ch == '{' || ch == '}' ||
  49                 ch == '[' || ch == ']' || ch == ';' ||
  50                 ch == '<' || ch == '>' || ch == ',' ||
  51                 ch == '.'  )
  52                 return true;
  53         return false;
  54 }
  55
  56 static void ColouriseAveDoc(
  57         unsigned int startPos,
  58         int length,
  59         int initStyle,
  60         WordList *keywordlists[],
  61         Accessor &styler) {
  62
  63         WordList &keywords = *keywordlists[0];
  64         WordList &keywords2 = *keywordlists[1];
  65         WordList &keywords3 = *keywordlists[2];
  66         WordList &keywords4 = *keywordlists[3];
  67         WordList &keywords5 = *keywordlists[4];
  68         WordList &keywords6 = *keywordlists[5];
  69
  70         // Do not leak onto next line
  71         if (initStyle == SCE_AVE_STRINGEOL) {
  72                 initStyle = SCE_AVE_DEFAULT;
  73         }
  74
  75         StyleContext sc(startPos, length, initStyle, styler);
  76
  77         for (; sc.More(); sc.Forward()) {
  78                 if (sc.atLineEnd) {
  79                         // Update the line state, so it can be seen by next line
  80                         int currentLine = styler.GetLine(sc.currentPos);
  81                         styler.SetLineState(currentLine, 0);
  82                 }
  83                 if (sc.atLineStart && (sc.state == SCE_AVE_STRING)) {
  84                         // Prevent SCE_AVE_STRINGEOL from leaking back to previous line
  85                         sc.SetState(SCE_AVE_STRING);
  86                 }
  87
  88
  89                 // Determine if the current state should terminate.
  90                 if (sc.state == SCE_AVE_OPERATOR) {
  91                         sc.SetState(SCE_AVE_DEFAULT);
  92                 } else if (sc.state == SCE_AVE_NUMBER) {
  93                         if (!IsANumberChar(sc.ch)) {
  94                                 sc.SetState(SCE_AVE_DEFAULT);
  95                         }
  96                 } else if (sc.state == SCE_AVE_ENUM) {
  97                         if (!IsEnumChar(sc.ch)) {
  98                                 sc.SetState(SCE_AVE_DEFAULT);
  99                         }
 100                 } else if (sc.state == SCE_AVE_IDENTIFIER) {
 101                         if (!IsAWordChar(sc.ch) || (sc.ch == '.')) {
 102                                 char s[100];
 103                                 //sc.GetCurrent(s, sizeof(s));
 104                                 sc.GetCurrentLowered(s, sizeof(s));
 105                                 if (keywords.InList(s)) {
 106                                         sc.ChangeState(SCE_AVE_WORD);
 107                                 } else if (keywords2.InList(s)) {
 108                                         sc.ChangeState(SCE_AVE_WORD2);
 109                                 } else if (keywords3.InList(s)) {
 110                                         sc.ChangeState(SCE_AVE_WORD3);
 111                                 } else if (keywords4.InList(s)) {
 112                                         sc.ChangeState(SCE_AVE_WORD4);
 113                                 } else if (keywords5.InList(s)) {
 114                                         sc.ChangeState(SCE_AVE_WORD5);
 115                                 } else if (keywords6.InList(s)) {
 116                                         sc.ChangeState(SCE_AVE_WORD6);
 117                                 }
 118                                 sc.SetState(SCE_AVE_DEFAULT);
 119                         }
 120                 } else if (sc.state == SCE_AVE_COMMENT) {
 121                         if (sc.atLineEnd) {
 122                                 sc.SetState(SCE_AVE_DEFAULT);
 123                         }
 124                 } else if (sc.state == SCE_AVE_STRING) {
 125                          if (sc.ch == '\"') {
 126                                 sc.ForwardSetState(SCE_AVE_DEFAULT);
 127                         } else if (sc.atLineEnd) {
 128                                 sc.ChangeState(SCE_AVE_STRINGEOL);
 129                                 sc.ForwardSetState(SCE_AVE_DEFAULT);
 130                         }
 131                 }
 132
 133                 // Determine if a new state should be entered.
 134                 if (sc.state == SCE_AVE_DEFAULT) {
 135                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 136                                 sc.SetState(SCE_AVE_NUMBER);
 137                         } else if (IsAWordStart(sc.ch)) {
 138                                 sc.SetState(SCE_AVE_IDENTIFIER);
 139                         } else if (sc.Match('\"')) {
 140                                 sc.SetState(SCE_AVE_STRING);
 141                         } else if (sc.Match('\'')) {
 142                                 sc.SetState(SCE_AVE_COMMENT);
 143                                 sc.Forward();
 144                         } else if (isAveOperator(static_cast<char>(sc.ch))) {
 145                                 sc.SetState(SCE_AVE_OPERATOR);
 146                         } else if (sc.Match('#')) {
 147                                 sc.SetState(SCE_AVE_ENUM);
 148                                 sc.Forward();
 149                         }
 150                 }
 151         }
 152         sc.Complete();
 153 }
 154
 155 static void FoldAveDoc(unsigned int startPos, int length, int /* initStyle */, WordList *[],
 156                        Accessor &styler) {
 157         unsigned int lengthDoc = startPos + length;
 158         int visibleChars = 0;
 159         int lineCurrent = styler.GetLine(startPos);
 160         int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
 161         int levelCurrent = levelPrev;
 162         char chNext = static_cast<char>(tolower(styler[startPos]));
 163         bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 164         int styleNext = styler.StyleAt(startPos);
 165         char s[10];
 166
 167         for (unsigned int i = startPos; i < lengthDoc; i++) {
 168                 char ch = static_cast<char>(tolower(chNext));
 169                 chNext = static_cast<char>(tolower(styler.SafeGetCharAt(i + 1)));
 170                 int style = styleNext;
 171                 styleNext = styler.StyleAt(i + 1);
 172                 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
 173                 if (style == SCE_AVE_WORD) {
 174                         if (ch == 't' || ch == 'f' || ch == 'w' || ch == 'e') {
 175                                 for (unsigned int j = 0; j < 6; j++) {
 176                                         if (!iswordchar(styler[i + j])) {
 177                                                 break;
 178                                         }
 179                                         s[j] = static_cast<char>(tolower(styler[i + j]));
 180                                         s[j + 1] = '\0';
 181                                 }
 182
 183                                 if ((strcmp(s, "then") == 0) || (strcmp(s, "for") == 0) || (strcmp(s, "while") == 0)) {
 184                                         levelCurrent++;
 185                                 }
 186                                 if ((strcmp(s, "end") == 0)) {
 187                                         levelCurrent--;
 188                                 }
 189                         }
 190                 } else if (style == SCE_AVE_OPERATOR) {
 191                         if (ch == '{' || ch == '(') {
 192                                 levelCurrent++;
 193                         } else if (ch == '}' || ch == ')') {
 194                                 levelCurrent--;
 195                         }
 196                 }
 197
 198                 if (atEOL) {
 199                         int lev = levelPrev;
 200                         if (visibleChars == 0 && foldCompact) {
 201                                 lev |= SC_FOLDLEVELWHITEFLAG;
 202                         }
 203                         if ((levelCurrent > levelPrev) && (visibleChars > 0)) {
 204                                 lev |= SC_FOLDLEVELHEADERFLAG;
 205                         }
 206                         if (lev != styler.LevelAt(lineCurrent)) {
 207                                 styler.SetLevel(lineCurrent, lev);
 208                         }
 209                         lineCurrent++;
 210                         levelPrev = levelCurrent;
 211                         visibleChars = 0;
 212                 }
 213                 if (!isspacechar(ch)) {
 214                         visibleChars++;
 215                 }
 216         }
 217         // Fill in the real level of the next line, keeping the current flags as they will be filled in later
 218
 219         int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
 220         styler.SetLevel(lineCurrent, levelPrev | flagsNext);
 221 }
 222
 223 LexerModule lmAVE(SCLEX_AVE, ColouriseAveDoc, "ave", FoldAveDoc);
 224