ext/scintilla/lexers/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 <stdio.h>
  13 #include <stdarg.h>
  14 #include <assert.h>
  15 #include <ctype.h>
  16
  17 #include "ILexer.h"
  18 #include "Scintilla.h"
  19 #include "SciLexer.h"
  20
  21 #include "WordList.h"
  22 #include "LexAccessor.h"
  23 #include "Accessor.h"
  24 #include "StyleContext.h"
  25 #include "CharacterSet.h"
  26 #include "LexerModule.h"
  27
  28 #ifdef SCI_NAMESPACE
  29 using namespace Scintilla;
  30 #endif
  31
  32
  33 static inline bool IsAWordChar(const int ch) {
  34         return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
  35 }
  36 static inline bool IsEnumChar(const int ch) {
  37         return (ch < 0x80) && (isalnum(ch)|| ch == '_');
  38 }
  39 static inline bool IsANumberChar(const int ch) {
  40         return (ch < 0x80) && (isalnum(ch) || ch == '.' );
  41 }
  42
  43 inline bool IsAWordStart(const int ch) {
  44         return (ch < 0x80) && (isalnum(ch) || ch == '_');
  45 }
  46
  47 inline bool isAveOperator(char ch) {
  48         if (isascii(ch) && isalnum(ch))
  49                 return false;
  50         // '.' left out as it is used to make up numbers
  51         if (ch == '*' || ch == '/' || ch == '-' || ch == '+' ||
  52                 ch == '(' || ch == ')' || ch == '=' ||
  53                 ch == '{' || ch == '}' ||
  54                 ch == '[' || ch == ']' || ch == ';' ||
  55                 ch == '<' || ch == '>' || ch == ',' ||
  56                 ch == '.'  )
  57                 return true;
  58         return false;
  59 }
  60
  61 static void ColouriseAveDoc(
  62         unsigned int startPos,
  63         int length,
  64         int initStyle,
  65         WordList *keywordlists[],
  66         Accessor &styler) {
  67
  68         WordList &keywords = *keywordlists[0];
  69         WordList &keywords2 = *keywordlists[1];
  70         WordList &keywords3 = *keywordlists[2];
  71         WordList &keywords4 = *keywordlists[3];
  72         WordList &keywords5 = *keywordlists[4];
  73         WordList &keywords6 = *keywordlists[5];
  74
  75         // Do not leak onto next line
  76         if (initStyle == SCE_AVE_STRINGEOL) {
  77                 initStyle = SCE_AVE_DEFAULT;
  78         }
  79
  80         StyleContext sc(startPos, length, initStyle, styler);
  81
  82         for (; sc.More(); sc.Forward()) {
  83                 if (sc.atLineEnd) {
  84                         // Update the line state, so it can be seen by next line
  85                         int currentLine = styler.GetLine(sc.currentPos);
  86                         styler.SetLineState(currentLine, 0);
  87                 }
  88                 if (sc.atLineStart && (sc.state == SCE_AVE_STRING)) {
  89                         // Prevent SCE_AVE_STRINGEOL from leaking back to previous line
  90                         sc.SetState(SCE_AVE_STRING);
  91                 }
  92
  93
  94                 // Determine if the current state should terminate.
  95                 if (sc.state == SCE_AVE_OPERATOR) {
  96                         sc.SetState(SCE_AVE_DEFAULT);
  97                 } else if (sc.state == SCE_AVE_NUMBER) {
  98                         if (!IsANumberChar(sc.ch)) {
  99                                 sc.SetState(SCE_AVE_DEFAULT);
 100                         }
 101                 } else if (sc.state == SCE_AVE_ENUM) {
 102                         if (!IsEnumChar(sc.ch)) {
 103                                 sc.SetState(SCE_AVE_DEFAULT);
 104                         }
 105                 } else if (sc.state == SCE_AVE_IDENTIFIER) {
 106                         if (!IsAWordChar(sc.ch) || (sc.ch == '.')) {
 107                                 char s[100];
 108                                 //sc.GetCurrent(s, sizeof(s));
 109                                 sc.GetCurrentLowered(s, sizeof(s));
 110                                 if (keywords.InList(s)) {
 111                                         sc.ChangeState(SCE_AVE_WORD);
 112                                 } else if (keywords2.InList(s)) {
 113                                         sc.ChangeState(SCE_AVE_WORD2);
 114                                 } else if (keywords3.InList(s)) {
 115                                         sc.ChangeState(SCE_AVE_WORD3);
 116                                 } else if (keywords4.InList(s)) {
 117                                         sc.ChangeState(SCE_AVE_WORD4);
 118                                 } else if (keywords5.InList(s)) {
 119                                         sc.ChangeState(SCE_AVE_WORD5);
 120                                 } else if (keywords6.InList(s)) {
 121                                         sc.ChangeState(SCE_AVE_WORD6);
 122                                 }
 123                                 sc.SetState(SCE_AVE_DEFAULT);
 124                         }
 125                 } else if (sc.state == SCE_AVE_COMMENT) {
 126                         if (sc.atLineEnd) {
 127                                 sc.SetState(SCE_AVE_DEFAULT);
 128                         }
 129                 } else if (sc.state == SCE_AVE_STRING) {
 130                          if (sc.ch == '\"') {
 131                                 sc.ForwardSetState(SCE_AVE_DEFAULT);
 132                         } else if (sc.atLineEnd) {
 133                                 sc.ChangeState(SCE_AVE_STRINGEOL);
 134                                 sc.ForwardSetState(SCE_AVE_DEFAULT);
 135                         }
 136                 }
 137
 138                 // Determine if a new state should be entered.
 139                 if (sc.state == SCE_AVE_DEFAULT) {
 140                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 141                                 sc.SetState(SCE_AVE_NUMBER);
 142                         } else if (IsAWordStart(sc.ch)) {
 143                                 sc.SetState(SCE_AVE_IDENTIFIER);
 144                         } else if (sc.Match('\"')) {
 145                                 sc.SetState(SCE_AVE_STRING);
 146                         } else if (sc.Match('\'')) {
 147                                 sc.SetState(SCE_AVE_COMMENT);
 148                                 sc.Forward();
 149                         } else if (isAveOperator(static_cast<char>(sc.ch))) {
 150                                 sc.SetState(SCE_AVE_OPERATOR);
 151                         } else if (sc.Match('#')) {
 152                                 sc.SetState(SCE_AVE_ENUM);
 153                                 sc.Forward();
 154                         }
 155                 }
 156         }
 157         sc.Complete();
 158 }
 159
 160 static void FoldAveDoc(unsigned int startPos, int length, int /* initStyle */, WordList *[],
 161                        Accessor &styler) {
 162         unsigned int lengthDoc = startPos + length;
 163         int visibleChars = 0;
 164         int lineCurrent = styler.GetLine(startPos);
 165         int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
 166         int levelCurrent = levelPrev;
 167         char chNext = static_cast<char>(tolower(styler[startPos]));
 168         bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 169         int styleNext = styler.StyleAt(startPos);
 170         char s[10];
 171
 172         for (unsigned int i = startPos; i < lengthDoc; i++) {
 173                 char ch = static_cast<char>(tolower(chNext));
 174                 chNext = static_cast<char>(tolower(styler.SafeGetCharAt(i + 1)));
 175                 int style = styleNext;
 176                 styleNext = styler.StyleAt(i + 1);
 177                 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
 178                 if (style == SCE_AVE_WORD) {
 179                         if (ch == 't' || ch == 'f' || ch == 'w' || ch == 'e') {
 180                                 for (unsigned int j = 0; j < 6; j++) {
 181                                         if (!iswordchar(styler[i + j])) {
 182                                                 break;
 183                                         }
 184                                         s[j] = static_cast<char>(tolower(styler[i + j]));
 185                                         s[j + 1] = '\0';
 186                                 }
 187
 188                                 if ((strcmp(s, "then") == 0) || (strcmp(s, "for") == 0) || (strcmp(s, "while") == 0)) {
 189                                         levelCurrent++;
 190                                 }
 191                                 if ((strcmp(s, "end") == 0) || (strcmp(s, "elseif") == 0)) {
 192                                         // Normally "elseif" and "then" will be on the same line and will cancel
 193                                         // each other out.  // As implemented, this does not support fold.at.else.
 194                                         levelCurrent--;
 195                                 }
 196                         }
 197                 } else if (style == SCE_AVE_OPERATOR) {
 198                         if (ch == '{' || ch == '(') {
 199                                 levelCurrent++;
 200                         } else if (ch == '}' || ch == ')') {
 201                                 levelCurrent--;
 202                         }
 203                 }
 204
 205                 if (atEOL) {
 206                         int lev = levelPrev;
 207                         if (visibleChars == 0 && foldCompact) {
 208                                 lev |= SC_FOLDLEVELWHITEFLAG;
 209                         }
 210                         if ((levelCurrent > levelPrev) && (visibleChars > 0)) {
 211                                 lev |= SC_FOLDLEVELHEADERFLAG;
 212                         }
 213                         if (lev != styler.LevelAt(lineCurrent)) {
 214                                 styler.SetLevel(lineCurrent, lev);
 215                         }
 216                         lineCurrent++;
 217                         levelPrev = levelCurrent;
 218                         visibleChars = 0;
 219                 }
 220                 if (!isspacechar(ch)) {
 221                         visibleChars++;
 222                 }
 223         }
 224         // Fill in the real level of the next line, keeping the current flags as they will be filled in later
 225
 226         int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
 227         styler.SetLevel(lineCurrent, levelPrev | flagsNext);
 228 }
 229
 230 LexerModule lmAVE(SCLEX_AVE, ColouriseAveDoc, "ave", FoldAveDoc);
 231