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 #ifdef SCI_NAMESPACE
  26 using namespace Scintilla;
  27 #endif
  28
  29
  30 static inline bool IsAWordChar(const int ch) {
  31         return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
  32 }
  33 static inline bool IsEnumChar(const int ch) {
  34         return (ch < 0x80) && (isalnum(ch)|| ch == '_');
  35 }
  36 static inline bool IsANumberChar(const int ch) {
  37         return (ch < 0x80) && (isalnum(ch) || ch == '.' );
  38 }
  39
  40 inline bool IsAWordStart(const int ch) {
  41         return (ch < 0x80) && (isalnum(ch) || ch == '_');
  42 }
  43
  44 inline bool isAveOperator(char ch) {
  45         if (isalnum(ch))
  46                 return false;
  47         // '.' left out as it is used to make up numbers
  48         if (ch == '*' || ch == '/' || ch == '-' || ch == '+' ||
  49                 ch == '(' || ch == ')' || ch == '=' ||
  50                 ch == '{' || ch == '}' ||
  51                 ch == '[' || ch == ']' || ch == ';' ||
  52                 ch == '<' || ch == '>' || ch == ',' ||
  53                 ch == '.'  )
  54                 return true;
  55         return false;
  56 }
  57
  58 static void ColouriseAveDoc(
  59         unsigned int startPos,
  60         int length,
  61         int initStyle,
  62         WordList *keywordlists[],
  63         Accessor &styler) {
  64
  65         WordList &keywords = *keywordlists[0];
  66         WordList &keywords2 = *keywordlists[1];
  67         WordList &keywords3 = *keywordlists[2];
  68         WordList &keywords4 = *keywordlists[3];
  69         WordList &keywords5 = *keywordlists[4];
  70         WordList &keywords6 = *keywordlists[5];
  71
  72         // Do not leak onto next line
  73         if (initStyle == SCE_AVE_STRINGEOL) {
  74                 initStyle = SCE_AVE_DEFAULT;
  75         }
  76
  77         StyleContext sc(startPos, length, initStyle, styler);
  78
  79         for (; sc.More(); sc.Forward()) {
  80                 if (sc.atLineEnd) {
  81                         // Update the line state, so it can be seen by next line
  82                         int currentLine = styler.GetLine(sc.currentPos);
  83                         styler.SetLineState(currentLine, 0);
  84                 }
  85                 if (sc.atLineStart && (sc.state == SCE_AVE_STRING)) {
  86                         // Prevent SCE_AVE_STRINGEOL from leaking back to previous line
  87                         sc.SetState(SCE_AVE_STRING);
  88                 }
  89
  90
  91                 // Determine if the current state should terminate.
  92                 if (sc.state == SCE_AVE_OPERATOR) {
  93                         sc.SetState(SCE_AVE_DEFAULT);
  94                 } else if (sc.state == SCE_AVE_NUMBER) {
  95                         if (!IsANumberChar(sc.ch)) {
  96                                 sc.SetState(SCE_AVE_DEFAULT);
  97                         }
  98                 } else if (sc.state == SCE_AVE_ENUM) {
  99                         if (!IsEnumChar(sc.ch)) {
 100                                 sc.SetState(SCE_AVE_DEFAULT);
 101                         }
 102                 } else if (sc.state == SCE_AVE_IDENTIFIER) {
 103                         if (!IsAWordChar(sc.ch) || (sc.ch == '.')) {
 104                                 char s[100];
 105                                 //sc.GetCurrent(s, sizeof(s));
 106                                 sc.GetCurrentLowered(s, sizeof(s));
 107                                 if (keywords.InList(s)) {
 108                                         sc.ChangeState(SCE_AVE_WORD);
 109                                 } else if (keywords2.InList(s)) {
 110                                         sc.ChangeState(SCE_AVE_WORD2);
 111                                 } else if (keywords3.InList(s)) {
 112                                         sc.ChangeState(SCE_AVE_WORD3);
 113                                 } else if (keywords4.InList(s)) {
 114                                         sc.ChangeState(SCE_AVE_WORD4);
 115                                 } else if (keywords5.InList(s)) {
 116                                         sc.ChangeState(SCE_AVE_WORD5);
 117                                 } else if (keywords6.InList(s)) {
 118                                         sc.ChangeState(SCE_AVE_WORD6);
 119                                 }
 120                                 sc.SetState(SCE_AVE_DEFAULT);
 121                         }
 122                 } else if (sc.state == SCE_AVE_COMMENT) {
 123                         if (sc.atLineEnd) {
 124                                 sc.SetState(SCE_AVE_DEFAULT);
 125                         }
 126                 } else if (sc.state == SCE_AVE_STRING) {
 127                          if (sc.ch == '\"') {
 128                                 sc.ForwardSetState(SCE_AVE_DEFAULT);
 129                         } else if (sc.atLineEnd) {
 130                                 sc.ChangeState(SCE_AVE_STRINGEOL);
 131                                 sc.ForwardSetState(SCE_AVE_DEFAULT);
 132                         }
 133                 }
 134
 135                 // Determine if a new state should be entered.
 136                 if (sc.state == SCE_AVE_DEFAULT) {
 137                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 138                                 sc.SetState(SCE_AVE_NUMBER);
 139                         } else if (IsAWordStart(sc.ch)) {
 140                                 sc.SetState(SCE_AVE_IDENTIFIER);
 141                         } else if (sc.Match('\"')) {
 142                                 sc.SetState(SCE_AVE_STRING);
 143                         } else if (sc.Match('\'')) {
 144                                 sc.SetState(SCE_AVE_COMMENT);
 145                                 sc.Forward();
 146                         } else if (isAveOperator(static_cast<char>(sc.ch))) {
 147                                 sc.SetState(SCE_AVE_OPERATOR);
 148                         } else if (sc.Match('#')) {
 149                                 sc.SetState(SCE_AVE_ENUM);
 150                                 sc.Forward();
 151                         }
 152                 }
 153         }
 154         sc.Complete();
 155 }
 156
 157 static void FoldAveDoc(unsigned int startPos, int length, int /* initStyle */, WordList *[],
 158                        Accessor &styler) {
 159         unsigned int lengthDoc = startPos + length;
 160         int visibleChars = 0;
 161         int lineCurrent = styler.GetLine(startPos);
 162         int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
 163         int levelCurrent = levelPrev;
 164         char chNext = static_cast<char>(tolower(styler[startPos]));
 165         bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 166         int styleNext = styler.StyleAt(startPos);
 167         char s[10];
 168
 169         for (unsigned int i = startPos; i < lengthDoc; i++) {
 170                 char ch = static_cast<char>(tolower(chNext));
 171                 chNext = static_cast<char>(tolower(styler.SafeGetCharAt(i + 1)));
 172                 int style = styleNext;
 173                 styleNext = styler.StyleAt(i + 1);
 174                 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
 175                 if (style == SCE_AVE_WORD) {
 176                         if (ch == 't' || ch == 'f' || ch == 'w' || ch == 'e') {
 177                                 for (unsigned int j = 0; j < 6; j++) {
 178                                         if (!iswordchar(styler[i + j])) {
 179                                                 break;
 180                                         }
 181                                         s[j] = static_cast<char>(tolower(styler[i + j]));
 182                                         s[j + 1] = '\0';
 183                                 }
 184
 185                                 if ((strcmp(s, "then") == 0) || (strcmp(s, "for") == 0) || (strcmp(s, "while") == 0)) {
 186                                         levelCurrent++;
 187                                 }
 188                                 if ((strcmp(s, "end") == 0) || (strcmp(s, "elseif") == 0)) {
 189                                         // Normally "elseif" and "then" will be on the same line and will cancel
 190                                         // each other out.  // As implemented, this does not support fold.at.else.
 191                                         levelCurrent--;
 192                                 }
 193                         }
 194                 } else if (style == SCE_AVE_OPERATOR) {
 195                         if (ch == '{' || ch == '(') {
 196                                 levelCurrent++;
 197                         } else if (ch == '}' || ch == ')') {
 198                                 levelCurrent--;
 199                         }
 200                 }
 201
 202                 if (atEOL) {
 203                         int lev = levelPrev;
 204                         if (visibleChars == 0 && foldCompact) {
 205                                 lev |= SC_FOLDLEVELWHITEFLAG;
 206                         }
 207                         if ((levelCurrent > levelPrev) && (visibleChars > 0)) {
 208                                 lev |= SC_FOLDLEVELHEADERFLAG;
 209                         }
 210                         if (lev != styler.LevelAt(lineCurrent)) {
 211                                 styler.SetLevel(lineCurrent, lev);
 212                         }
 213                         lineCurrent++;
 214                         levelPrev = levelCurrent;
 215                         visibleChars = 0;
 216                 }
 217                 if (!isspacechar(ch)) {
 218                         visibleChars++;
 219                 }
 220         }
 221         // Fill in the real level of the next line, keeping the current flags as they will be filled in later
 222
 223         int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
 224         styler.SetLevel(lineCurrent, levelPrev | flagsNext);
 225 }
 226
 227 LexerModule lmAVE(SCLEX_AVE, ColouriseAveDoc, "ave", FoldAveDoc);
 228