scintilla/LexEScript.cxx

   1 // Scintilla source code edit control
   2 /** @file LexESCRIPT.cxx
   3  ** Lexer for ESCRIPT
   4  **/
   5 // Copyright 2003 by Patrizio Bekerle (patrizio@bekerle.com)
   6
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <ctype.h>
  10 #include <stdio.h>
  11 #include <stdarg.h>
  12
  13 #include "Platform.h"
  14
  15 #include "PropSet.h"
  16 #include "Accessor.h"
  17 #include "StyleContext.h"
  18 #include "KeyWords.h"
  19 #include "Scintilla.h"
  20 #include "SciLexer.h"
  21
  22
  23
  24 static inline bool IsAWordChar(const int ch) {
  25         return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
  26 }
  27
  28 static inline bool IsAWordStart(const int ch) {
  29         return (ch < 0x80) && (isalnum(ch) || ch == '_');
  30 }
  31
  32
  33
  34 static void ColouriseESCRIPTDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
  35                             Accessor &styler) {
  36
  37         WordList &keywords = *keywordlists[0];
  38         WordList &keywords2 = *keywordlists[1];
  39         WordList &keywords3 = *keywordlists[2];
  40
  41         // Do not leak onto next line
  42         /*if (initStyle == SCE_ESCRIPT_STRINGEOL)
  43                 initStyle = SCE_ESCRIPT_DEFAULT;*/
  44
  45         StyleContext sc(startPos, length, initStyle, styler);
  46
  47         bool caseSensitive = styler.GetPropertyInt("escript.case.sensitive", 0) != 0;
  48
  49         for (; sc.More(); sc.Forward()) {
  50
  51                 /*if (sc.atLineStart && (sc.state == SCE_ESCRIPT_STRING)) {
  52                         // Prevent SCE_ESCRIPT_STRINGEOL from leaking back to previous line
  53                         sc.SetState(SCE_ESCRIPT_STRING);
  54                 }*/
  55
  56                 // Handle line continuation generically.
  57                 if (sc.ch == '\\') {
  58                         if (sc.chNext == '\n' || sc.chNext == '\r') {
  59                                 sc.Forward();
  60                                 if (sc.ch == '\r' && sc.chNext == '\n') {
  61                                         sc.Forward();
  62                                 }
  63                                 continue;
  64                         }
  65                 }
  66
  67                 // Determine if the current state should terminate.
  68                 if (sc.state == SCE_ESCRIPT_OPERATOR || sc.state == SCE_ESCRIPT_BRACE) {
  69                         sc.SetState(SCE_ESCRIPT_DEFAULT);
  70                 } else if (sc.state == SCE_ESCRIPT_NUMBER) {
  71                         if (!IsADigit(sc.ch) || sc.ch != '.') {
  72                                 sc.SetState(SCE_ESCRIPT_DEFAULT);
  73                         }
  74                 } else if (sc.state == SCE_ESCRIPT_IDENTIFIER) {
  75                         if (!IsAWordChar(sc.ch) || (sc.ch == '.')) {
  76                                 char s[100];
  77                                 if (caseSensitive) {
  78                                         sc.GetCurrent(s, sizeof(s));
  79                                 } else {
  80                                         sc.GetCurrentLowered(s, sizeof(s));
  81                                 }
  82
  83 //                              sc.GetCurrentLowered(s, sizeof(s));
  84
  85                                 if (keywords.InList(s)) {
  86                                         sc.ChangeState(SCE_ESCRIPT_WORD);
  87                                 } else if (keywords2.InList(s)) {
  88                                         sc.ChangeState(SCE_ESCRIPT_WORD2);
  89                                 } else if (keywords3.InList(s)) {
  90                                         sc.ChangeState(SCE_ESCRIPT_WORD3);
  91                                         // sc.state = SCE_ESCRIPT_IDENTIFIER;
  92                                 }
  93                                 sc.SetState(SCE_ESCRIPT_DEFAULT);
  94                         }
  95                 } else if (sc.state == SCE_ESCRIPT_COMMENT) {
  96                         if (sc.Match('*', '/')) {
  97                                 sc.Forward();
  98                                 sc.ForwardSetState(SCE_ESCRIPT_DEFAULT);
  99                         }
 100                 } else if (sc.state == SCE_ESCRIPT_COMMENTDOC) {
 101                         if (sc.Match('*', '/')) {
 102                                 sc.Forward();
 103                                 sc.ForwardSetState(SCE_ESCRIPT_DEFAULT);
 104                         }
 105                 } else if (sc.state == SCE_ESCRIPT_COMMENTLINE) {
 106                         if (sc.atLineEnd) {
 107                                 sc.SetState(SCE_ESCRIPT_DEFAULT);
 108                         }
 109                 } else if (sc.state == SCE_ESCRIPT_STRING) {
 110                         if (sc.ch == '\\') {
 111                                 if (sc.chNext == '\"' || sc.chNext == '\\') {
 112                                         sc.Forward();
 113                                 }
 114                         } else if (sc.ch == '\"') {
 115                                 sc.ForwardSetState(SCE_ESCRIPT_DEFAULT);
 116                         }
 117                 }
 118
 119                 // Determine if a new state should be entered.
 120                 if (sc.state == SCE_ESCRIPT_DEFAULT) {
 121                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 122                                 sc.SetState(SCE_ESCRIPT_NUMBER);
 123                         } else if (IsAWordStart(sc.ch) || (sc.ch == '#')) {
 124                                 sc.SetState(SCE_ESCRIPT_IDENTIFIER);
 125                         } else if (sc.Match('/', '*')) {
 126                                 sc.SetState(SCE_ESCRIPT_COMMENT);
 127                                 sc.Forward();   // Eat the * so it isn't used for the end of the comment
 128                         } else if (sc.Match('/', '/')) {
 129                                 sc.SetState(SCE_ESCRIPT_COMMENTLINE);
 130                         } else if (sc.ch == '\"') {
 131                                 sc.SetState(SCE_ESCRIPT_STRING);
 132                                 //} else if (isoperator(static_cast<char>(sc.ch))) {
 133                         } 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 == ':') {
 134                                 sc.SetState(SCE_ESCRIPT_OPERATOR);
 135                         } else if (sc.ch == '{' || sc.ch == '}') {
 136                                 sc.SetState(SCE_ESCRIPT_BRACE);
 137                         }
 138                 }
 139
 140         }
 141         sc.Complete();
 142 }
 143
 144
 145 static int classifyFoldPointESCRIPT(const char* s, const char* prevWord) {
 146         int lev = 0;
 147         if (strcmp(prevWord, "end") == 0) return lev;
 148         if ((strcmp(prevWord, "else") == 0 && strcmp(s, "if") == 0) || strcmp(s, "elseif") == 0)
 149                 return -1;
 150
 151         if (strcmp(s, "for") == 0 || strcmp(s, "foreach") == 0
 152             || strcmp(s, "program") == 0 || strcmp(s, "function") == 0
 153             || strcmp(s, "while") == 0 || strcmp(s, "case") == 0
 154             || strcmp(s, "if") == 0 ) {
 155                 lev = 1;
 156         } else if ( strcmp(s, "endfor") == 0 || strcmp(s, "endforeach") == 0
 157             || strcmp(s, "endprogram") == 0 || strcmp(s, "endfunction") == 0
 158             || strcmp(s, "endwhile") == 0 || strcmp(s, "endcase") == 0
 159             || strcmp(s, "endif") == 0 ) {
 160                 lev = -1;
 161         }
 162
 163         return lev;
 164 }
 165
 166
 167 static bool IsStreamCommentStyle(int style) {
 168         return style == SCE_ESCRIPT_COMMENT ||
 169                style == SCE_ESCRIPT_COMMENTDOC ||
 170                style == SCE_ESCRIPT_COMMENTLINE;
 171 }
 172
 173 static void FoldESCRIPTDoc(unsigned int startPos, int length, int initStyle, WordList *[], Accessor &styler) {
 174         //~ bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
 175         // Do not know how to fold the comment at the moment.
 176         bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 177         bool foldComment = true;
 178         unsigned int endPos = startPos + length;
 179         int visibleChars = 0;
 180         int lineCurrent = styler.GetLine(startPos);
 181         int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
 182         int levelCurrent = levelPrev;
 183         char chNext = styler[startPos];
 184         int styleNext = styler.StyleAt(startPos);
 185         int style = initStyle;
 186
 187         int lastStart = 0;
 188         char prevWord[32] = "";
 189
 190         for (unsigned int i = startPos; i < endPos; i++) {
 191                 char ch = chNext;
 192                 chNext = styler.SafeGetCharAt(i + 1);
 193                 int stylePrev = style;
 194                 style = styleNext;
 195                 styleNext = styler.StyleAt(i + 1);
 196                 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
 197
 198
 199                 if (foldComment && IsStreamCommentStyle(style)) {
 200                         if (!IsStreamCommentStyle(stylePrev)) {
 201                                 levelCurrent++;
 202                         } else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
 203                                 // Comments don't end at end of line and the next character may be unstyled.
 204                                 levelCurrent--;
 205                         }
 206                 }
 207
 208                 if (foldComment && (style == SCE_ESCRIPT_COMMENTLINE)) {
 209                         if ((ch == '/') && (chNext == '/')) {
 210                                 char chNext2 = styler.SafeGetCharAt(i + 2);
 211                                 if (chNext2 == '{') {
 212                                         levelCurrent++;
 213                                 } else if (chNext2 == '}') {
 214                                         levelCurrent--;
 215                                 }
 216                         }
 217                 }
 218
 219                 if (stylePrev == SCE_ESCRIPT_DEFAULT && style == SCE_ESCRIPT_WORD3)
 220                 {
 221                         // Store last word start point.
 222                         lastStart = i;
 223                 }
 224
 225                 if (style == SCE_ESCRIPT_WORD3) {
 226                         if(iswordchar(ch) && !iswordchar(chNext)) {
 227                                 char s[32];
 228                                 unsigned int j;
 229                                 for(j = 0; ( j < 31 ) && ( j < i-lastStart+1 ); j++) {
 230                                         s[j] = static_cast<char>(tolower(styler[lastStart + j]));
 231                                 }
 232                                 s[j] = '\0';
 233                                 levelCurrent += classifyFoldPointESCRIPT(s, prevWord);
 234                                 strcpy(prevWord, s);
 235                         }
 236                 }
 237                 if (atEOL) {
 238                         int lev = levelPrev;
 239                         if (visibleChars == 0 && foldCompact)
 240                                 lev |= SC_FOLDLEVELWHITEFLAG;
 241                         if ((levelCurrent > levelPrev) && (visibleChars > 0))
 242                                 lev |= SC_FOLDLEVELHEADERFLAG;
 243                         if (lev != styler.LevelAt(lineCurrent)) {
 244                                 styler.SetLevel(lineCurrent, lev);
 245                         }
 246                         lineCurrent++;
 247                         levelPrev = levelCurrent;
 248                         visibleChars = 0;
 249                         strcpy(prevWord, "");
 250                 }
 251
 252                 if (!isspacechar(ch))
 253                         visibleChars++;
 254         }
 255
 256         // Fill in the real level of the next line, keeping the current flags as they will be filled in later
 257         int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
 258         styler.SetLevel(lineCurrent, levelPrev | flagsNext);
 259 }
 260
 261
 262
 263 static const char * const ESCRIPTWordLists[] = {
 264         "Primary keywords and identifiers",
 265         "Intrinsic functions",
 266         "Extended and user defined functions",
 267         0,
 268 };
 269
 270 LexerModule lmESCRIPT(SCLEX_ESCRIPT, ColouriseESCRIPTDoc, "escript", FoldESCRIPTDoc, ESCRIPTWordLists);