contrib/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
  16 #include "Platform.h"
  17
  18 #include "PropSet.h"
  19 #include "Accessor.h"
  20 #include "StyleContext.h"
  21 #include "KeyWords.h"
  22 #include "Scintilla.h"
  23 #include "SciLexer.h"
  24
  25
  26
  27 static inline bool IsAWordChar(const int ch) {
  28         return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
  29 }
  30 static inline bool IsEnumChar(const int ch) {
  31         return (ch < 0x80) && (isalnum(ch)|| ch == '_');
  32 }
  33 static inline bool IsANumberChar(const int ch) {
  34         return (ch < 0x80) && (isalnum(ch) || ch == '.' );
  35 }
  36
  37 inline bool IsAWordStart(const int ch) {
  38         return (ch < 0x80) && (isalnum(ch) || ch == '_');
  39 }
  40
  41 inline bool isAveOperator(char ch) {
  42         if (isalnum(ch))
  43                 return false;
  44         // '.' left out as it is used to make up numbers
  45         if (ch == '*' || ch == '/' || ch == '-' || ch == '+' ||
  46                 ch == '(' || ch == ')' || ch == '=' ||
  47                 ch == '{' || ch == '}' ||
  48                 ch == '[' || ch == ']' || ch == ';' ||
  49                 ch == '<' || ch == '>' || ch == ',' ||
  50                 ch == '.'  )
  51                 return true;
  52         return false;
  53 }
  54
  55 static void ColouriseAveDoc(
  56         unsigned int startPos,
  57         int length,
  58         int initStyle,
  59         WordList *keywordlists[],
  60         Accessor &styler) {
  61
  62         WordList &keywords = *keywordlists[0];
  63         WordList &keywords2 = *keywordlists[1];
  64         WordList &keywords3 = *keywordlists[2];
  65         WordList &keywords4 = *keywordlists[3];
  66         WordList &keywords5 = *keywordlists[4];
  67         WordList &keywords6 = *keywordlists[5];
  68
  69         // Do not leak onto next line
  70         if (initStyle == SCE_AVE_STRINGEOL) {
  71                 initStyle = SCE_AVE_DEFAULT;
  72         }
  73
  74         StyleContext sc(startPos, length, initStyle, styler);
  75
  76         for (; sc.More(); sc.Forward()) {
  77                 if (sc.atLineEnd) {
  78                         // Update the line state, so it can be seen by next line
  79                         int currentLine = styler.GetLine(sc.currentPos);
  80                         styler.SetLineState(currentLine, 0);
  81                 }
  82                 if (sc.atLineStart && (sc.state == SCE_AVE_STRING)) {
  83                         // Prevent SCE_AVE_STRINGEOL from leaking back to previous line
  84                         sc.SetState(SCE_AVE_STRING);
  85                 }
  86
  87
  88                 // Determine if the current state should terminate.
  89                 if (sc.state == SCE_AVE_OPERATOR) {
  90                         sc.SetState(SCE_AVE_DEFAULT);
  91                 } else if (sc.state == SCE_AVE_NUMBER) {
  92                         if (!IsANumberChar(sc.ch)) {
  93                                 sc.SetState(SCE_AVE_DEFAULT);
  94                         }
  95                 } else if (sc.state == SCE_AVE_ENUM) {
  96                         if (!IsEnumChar(sc.ch)) {
  97                                 sc.SetState(SCE_AVE_DEFAULT);
  98                         }
  99                 } else if (sc.state == SCE_AVE_IDENTIFIER) {
 100                         if (!IsAWordChar(sc.ch) || (sc.ch == '.')) {
 101                                 char s[100];
 102                                 //sc.GetCurrent(s, sizeof(s));
 103                                 sc.GetCurrentLowered(s, sizeof(s));
 104                                 if (keywords.InList(s)) {
 105                                         sc.ChangeState(SCE_AVE_WORD);
 106                                 } else if (keywords2.InList(s)) {
 107                                         sc.ChangeState(SCE_AVE_WORD2);
 108                                 } else if (keywords3.InList(s)) {
 109                                         sc.ChangeState(SCE_AVE_WORD3);
 110                                 } else if (keywords4.InList(s)) {
 111                                         sc.ChangeState(SCE_AVE_WORD4);
 112                                 } else if (keywords5.InList(s)) {
 113                                         sc.ChangeState(SCE_AVE_WORD5);
 114                                 } else if (keywords6.InList(s)) {
 115                                         sc.ChangeState(SCE_AVE_WORD6);
 116                                 }
 117                                 sc.SetState(SCE_AVE_DEFAULT);
 118                         }
 119                 } else if (sc.state == SCE_AVE_COMMENT) {
 120                         if (sc.atLineEnd) {
 121                                 sc.SetState(SCE_AVE_DEFAULT);
 122                         }
 123                 } else if (sc.state == SCE_AVE_STRING) {
 124                          if (sc.ch == '\"') {
 125                                 sc.ForwardSetState(SCE_AVE_DEFAULT);
 126                         } else if (sc.atLineEnd) {
 127                                 sc.ChangeState(SCE_AVE_STRINGEOL);
 128                                 sc.ForwardSetState(SCE_AVE_DEFAULT);
 129                         }
 130                 }
 131
 132                 // Determine if a new state should be entered.
 133                 if (sc.state == SCE_AVE_DEFAULT) {
 134                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 135                                 sc.SetState(SCE_AVE_NUMBER);
 136                         } else if (IsAWordStart(sc.ch)) {
 137                                 sc.SetState(SCE_AVE_IDENTIFIER);
 138                         } else if (sc.Match('\"')) {
 139                                 sc.SetState(SCE_AVE_STRING);
 140                         } else if (sc.Match('\'')) {
 141                                 sc.SetState(SCE_AVE_COMMENT);
 142                                 sc.Forward();
 143                         } else if (isAveOperator(static_cast<char>(sc.ch))) {
 144                                 sc.SetState(SCE_AVE_OPERATOR);
 145                         } else if (sc.Match('#')) {
 146                                 sc.SetState(SCE_AVE_ENUM);
 147                                 sc.Forward();
 148                         }
 149                 }
 150         }
 151         sc.Complete();
 152 }
 153
 154 static void FoldAveDoc(unsigned int startPos, int length, int /* initStyle */, WordList *[],
 155                        Accessor &styler) {
 156         unsigned int lengthDoc = startPos + length;
 157         int visibleChars = 0;
 158         int lineCurrent = styler.GetLine(startPos);
 159         int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
 160         int levelCurrent = levelPrev;
 161         char chNext = static_cast<char>(tolower(styler[startPos]));
 162         bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 163         int styleNext = styler.StyleAt(startPos);
 164         char s[10];
 165
 166         for (unsigned int i = startPos; i < lengthDoc; i++) {
 167                 char ch = static_cast<char>(tolower(chNext));
 168                 chNext = static_cast<char>(tolower(styler.SafeGetCharAt(i + 1)));
 169                 int style = styleNext;
 170                 styleNext = styler.StyleAt(i + 1);
 171                 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
 172                 if (style == SCE_AVE_WORD) {
 173                         if (ch == 't' || ch == 'f' || ch == 'w' || ch == 'e') {
 174                                 for (unsigned int j = 0; j < 6; j++) {
 175                                         if (!iswordchar(styler[i + j])) {
 176                                                 break;
 177                                         }
 178                                         s[j] = static_cast<char>(tolower(styler[i + j]));
 179                                         s[j + 1] = '\0';
 180                                 }
 181
 182                                 if ((strcmp(s, "then") == 0) || (strcmp(s, "for") == 0) || (strcmp(s, "while") == 0)) {
 183                                         levelCurrent++;
 184                                 }
 185                                 if ((strcmp(s, "end") == 0) || (strcmp(s, "elseif") == 0)) {
 186                                         // Normally "elseif" and "then" will be on the same line and will cancel
 187                                         // each other out.  // As implemented, this does not support fold.at.else.
 188                                         levelCurrent--;
 189                                 }
 190                         }
 191                 } else if (style == SCE_AVE_OPERATOR) {
 192                         if (ch == '{' || ch == '(') {
 193                                 levelCurrent++;
 194                         } else if (ch == '}' || ch == ')') {
 195                                 levelCurrent--;
 196                         }
 197                 }
 198
 199                 if (atEOL) {
 200                         int lev = levelPrev;
 201                         if (visibleChars == 0 && foldCompact) {
 202                                 lev |= SC_FOLDLEVELWHITEFLAG;
 203                         }
 204                         if ((levelCurrent > levelPrev) && (visibleChars > 0)) {
 205                                 lev |= SC_FOLDLEVELHEADERFLAG;
 206                         }
 207                         if (lev != styler.LevelAt(lineCurrent)) {
 208                                 styler.SetLevel(lineCurrent, lev);
 209                         }
 210                         lineCurrent++;
 211                         levelPrev = levelCurrent;
 212                         visibleChars = 0;
 213                 }
 214                 if (!isspacechar(ch)) {
 215                         visibleChars++;
 216                 }
 217         }
 218         // Fill in the real level of the next line, keeping the current flags as they will be filled in later
 219
 220         int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
 221         styler.SetLevel(lineCurrent, levelPrev | flagsNext);
 222 }
 223
 224 LexerModule lmAVE(SCLEX_AVE, ColouriseAveDoc, "ave", FoldAveDoc);
 225