ext/scintilla/src/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 #ifdef SCI_NAMESPACE
  23 using namespace Scintilla;
  24 #endif
  25
  26
  27 static inline bool IsAWordChar(const int ch) {
  28         return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
  29 }
  30
  31 static inline bool IsAWordStart(const int ch) {
  32         return (ch < 0x80) && (isalnum(ch) || ch == '_');
  33 }
  34
  35
  36
  37 static void ColouriseESCRIPTDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
  38                             Accessor &styler) {
  39
  40         WordList &keywords = *keywordlists[0];
  41         WordList &keywords2 = *keywordlists[1];
  42         WordList &keywords3 = *keywordlists[2];
  43
  44         // Do not leak onto next line
  45         /*if (initStyle == SCE_ESCRIPT_STRINGEOL)
  46                 initStyle = SCE_ESCRIPT_DEFAULT;*/
  47
  48         StyleContext sc(startPos, length, initStyle, styler);
  49
  50         bool caseSensitive = styler.GetPropertyInt("escript.case.sensitive", 0) != 0;
  51
  52         for (; sc.More(); sc.Forward()) {
  53
  54                 /*if (sc.atLineStart && (sc.state == SCE_ESCRIPT_STRING)) {
  55                         // Prevent SCE_ESCRIPT_STRINGEOL from leaking back to previous line
  56                         sc.SetState(SCE_ESCRIPT_STRING);
  57                 }*/
  58
  59                 // Handle line continuation generically.
  60                 if (sc.ch == '\\') {
  61                         if (sc.chNext == '\n' || sc.chNext == '\r') {
  62                                 sc.Forward();
  63                                 if (sc.ch == '\r' && sc.chNext == '\n') {
  64                                         sc.Forward();
  65                                 }
  66                                 continue;
  67                         }
  68                 }
  69
  70                 // Determine if the current state should terminate.
  71                 if (sc.state == SCE_ESCRIPT_OPERATOR || sc.state == SCE_ESCRIPT_BRACE) {
  72                         sc.SetState(SCE_ESCRIPT_DEFAULT);
  73                 } else if (sc.state == SCE_ESCRIPT_NUMBER) {
  74                         if (!IsADigit(sc.ch) || sc.ch != '.') {
  75                                 sc.SetState(SCE_ESCRIPT_DEFAULT);
  76                         }
  77                 } else if (sc.state == SCE_ESCRIPT_IDENTIFIER) {
  78                         if (!IsAWordChar(sc.ch) || (sc.ch == '.')) {
  79                                 char s[100];
  80                                 if (caseSensitive) {
  81                                         sc.GetCurrent(s, sizeof(s));
  82                                 } else {
  83                                         sc.GetCurrentLowered(s, sizeof(s));
  84                                 }
  85
  86 //                              sc.GetCurrentLowered(s, sizeof(s));
  87
  88                                 if (keywords.InList(s)) {
  89                                         sc.ChangeState(SCE_ESCRIPT_WORD);
  90                                 } else if (keywords2.InList(s)) {
  91                                         sc.ChangeState(SCE_ESCRIPT_WORD2);
  92                                 } else if (keywords3.InList(s)) {
  93                                         sc.ChangeState(SCE_ESCRIPT_WORD3);
  94                                         // sc.state = SCE_ESCRIPT_IDENTIFIER;
  95                                 }
  96                                 sc.SetState(SCE_ESCRIPT_DEFAULT);
  97                         }
  98                 } else if (sc.state == SCE_ESCRIPT_COMMENT) {
  99                         if (sc.Match('*', '/')) {
 100                                 sc.Forward();
 101                                 sc.ForwardSetState(SCE_ESCRIPT_DEFAULT);
 102                         }
 103                 } else if (sc.state == SCE_ESCRIPT_COMMENTDOC) {
 104                         if (sc.Match('*', '/')) {
 105                                 sc.Forward();
 106                                 sc.ForwardSetState(SCE_ESCRIPT_DEFAULT);
 107                         }
 108                 } else if (sc.state == SCE_ESCRIPT_COMMENTLINE) {
 109                         if (sc.atLineEnd) {
 110                                 sc.SetState(SCE_ESCRIPT_DEFAULT);
 111                         }
 112                 } else if (sc.state == SCE_ESCRIPT_STRING) {
 113                         if (sc.ch == '\\') {
 114                                 if (sc.chNext == '\"' || sc.chNext == '\\') {
 115                                         sc.Forward();
 116                                 }
 117                         } else if (sc.ch == '\"') {
 118                                 sc.ForwardSetState(SCE_ESCRIPT_DEFAULT);
 119                         }
 120                 }
 121
 122                 // Determine if a new state should be entered.
 123                 if (sc.state == SCE_ESCRIPT_DEFAULT) {
 124                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 125                                 sc.SetState(SCE_ESCRIPT_NUMBER);
 126                         } else if (IsAWordStart(sc.ch) || (sc.ch == '#')) {
 127                                 sc.SetState(SCE_ESCRIPT_IDENTIFIER);
 128                         } else if (sc.Match('/', '*')) {
 129                                 sc.SetState(SCE_ESCRIPT_COMMENT);
 130                                 sc.Forward();   // Eat the * so it isn't used for the end of the comment
 131                         } else if (sc.Match('/', '/')) {
 132                                 sc.SetState(SCE_ESCRIPT_COMMENTLINE);
 133                         } else if (sc.ch == '\"') {
 134                                 sc.SetState(SCE_ESCRIPT_STRING);
 135                                 //} else if (isoperator(static_cast<char>(sc.ch))) {
 136                         } 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 == ':') {
 137                                 sc.SetState(SCE_ESCRIPT_OPERATOR);
 138                         } else if (sc.ch == '{' || sc.ch == '}') {
 139                                 sc.SetState(SCE_ESCRIPT_BRACE);
 140                         }
 141                 }
 142
 143         }
 144         sc.Complete();
 145 }
 146
 147
 148 static int classifyFoldPointESCRIPT(const char* s, const char* prevWord) {
 149         int lev = 0;
 150         if (strcmp(prevWord, "end") == 0) return lev;
 151         if ((strcmp(prevWord, "else") == 0 && strcmp(s, "if") == 0) || strcmp(s, "elseif") == 0)
 152                 return -1;
 153
 154         if (strcmp(s, "for") == 0 || strcmp(s, "foreach") == 0
 155             || strcmp(s, "program") == 0 || strcmp(s, "function") == 0
 156             || strcmp(s, "while") == 0 || strcmp(s, "case") == 0
 157             || strcmp(s, "if") == 0 ) {
 158                 lev = 1;
 159         } else if ( strcmp(s, "endfor") == 0 || strcmp(s, "endforeach") == 0
 160             || strcmp(s, "endprogram") == 0 || strcmp(s, "endfunction") == 0
 161             || strcmp(s, "endwhile") == 0 || strcmp(s, "endcase") == 0
 162             || strcmp(s, "endif") == 0 ) {
 163                 lev = -1;
 164         }
 165
 166         return lev;
 167 }
 168
 169
 170 static bool IsStreamCommentStyle(int style) {
 171         return style == SCE_ESCRIPT_COMMENT ||
 172                style == SCE_ESCRIPT_COMMENTDOC ||
 173                style == SCE_ESCRIPT_COMMENTLINE;
 174 }
 175
 176 static void FoldESCRIPTDoc(unsigned int startPos, int length, int initStyle, WordList *[], Accessor &styler) {
 177         //~ bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
 178         // Do not know how to fold the comment at the moment.
 179         bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 180         bool foldComment = true;
 181         unsigned int endPos = startPos + length;
 182         int visibleChars = 0;
 183         int lineCurrent = styler.GetLine(startPos);
 184         int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
 185         int levelCurrent = levelPrev;
 186         char chNext = styler[startPos];
 187         int styleNext = styler.StyleAt(startPos);
 188         int style = initStyle;
 189
 190         int lastStart = 0;
 191         char prevWord[32] = "";
 192
 193         for (unsigned int i = startPos; i < endPos; i++) {
 194                 char ch = chNext;
 195                 chNext = styler.SafeGetCharAt(i + 1);
 196                 int stylePrev = style;
 197                 style = styleNext;
 198                 styleNext = styler.StyleAt(i + 1);
 199                 bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
 200
 201
 202                 if (foldComment && IsStreamCommentStyle(style)) {
 203                         if (!IsStreamCommentStyle(stylePrev)) {
 204                                 levelCurrent++;
 205                         } else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
 206                                 // Comments don't end at end of line and the next character may be unstyled.
 207                                 levelCurrent--;
 208                         }
 209                 }
 210
 211                 if (foldComment && (style == SCE_ESCRIPT_COMMENTLINE)) {
 212                         if ((ch == '/') && (chNext == '/')) {
 213                                 char chNext2 = styler.SafeGetCharAt(i + 2);
 214                                 if (chNext2 == '{') {
 215                                         levelCurrent++;
 216                                 } else if (chNext2 == '}') {
 217                                         levelCurrent--;
 218                                 }
 219                         }
 220                 }
 221
 222                 if (stylePrev == SCE_ESCRIPT_DEFAULT && style == SCE_ESCRIPT_WORD3)
 223                 {
 224                         // Store last word start point.
 225                         lastStart = i;
 226                 }
 227
 228                 if (style == SCE_ESCRIPT_WORD3) {
 229                         if(iswordchar(ch) && !iswordchar(chNext)) {
 230                                 char s[32];
 231                                 unsigned int j;
 232                                 for(j = 0; ( j < 31 ) && ( j < i-lastStart+1 ); j++) {
 233                                         s[j] = static_cast<char>(tolower(styler[lastStart + j]));
 234                                 }
 235                                 s[j] = '\0';
 236                                 levelCurrent += classifyFoldPointESCRIPT(s, prevWord);
 237                                 strcpy(prevWord, s);
 238                         }
 239                 }
 240                 if (atEOL) {
 241                         int lev = levelPrev;
 242                         if (visibleChars == 0 && foldCompact)
 243                                 lev |= SC_FOLDLEVELWHITEFLAG;
 244                         if ((levelCurrent > levelPrev) && (visibleChars > 0))
 245                                 lev |= SC_FOLDLEVELHEADERFLAG;
 246                         if (lev != styler.LevelAt(lineCurrent)) {
 247                                 styler.SetLevel(lineCurrent, lev);
 248                         }
 249                         lineCurrent++;
 250                         levelPrev = levelCurrent;
 251                         visibleChars = 0;
 252                         strcpy(prevWord, "");
 253                 }
 254
 255                 if (!isspacechar(ch))
 256                         visibleChars++;
 257         }
 258
 259         // Fill in the real level of the next line, keeping the current flags as they will be filled in later
 260         int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
 261         styler.SetLevel(lineCurrent, levelPrev | flagsNext);
 262 }
 263
 264
 265
 266 static const char * const ESCRIPTWordLists[] = {
 267         "Primary keywords and identifiers",
 268         "Intrinsic functions",
 269         "Extended and user defined functions",
 270         0,
 271 };
 272
 273 LexerModule lmESCRIPT(SCLEX_ESCRIPT, ColouriseESCRIPTDoc, "escript", FoldESCRIPTDoc, ESCRIPTWordLists);