plugins/scintilla/scintilla/LexPython.cxx

   1 // Scintilla source code edit control
   2 /** @file LexPython.cxx
   3  ** Lexer for Python.
   4  **/
   5 // Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <stdio.h>
  11 #include <stdarg.h>
  12 #include <assert.h>
  13 #include <ctype.h>
  14
  15 #include "ILexer.h"
  16 #include "Scintilla.h"
  17 #include "SciLexer.h"
  18
  19 #include "WordList.h"
  20 #include "LexAccessor.h"
  21 #include "Accessor.h"
  22 #include "StyleContext.h"
  23 #include "CharacterSet.h"
  24 #include "LexerModule.h"
  25
  26 #ifdef SCI_NAMESPACE
  27 using namespace Scintilla;
  28 #endif
  29
  30 /* kwCDef, kwCTypeName only used for Cython */
  31 enum kwType { kwOther, kwClass, kwDef, kwImport, kwCDef, kwCTypeName, kwCPDef };
  32
  33 static const int indicatorWhitespace = 1;
  34
  35 static bool IsPyComment(Accessor &styler, int pos, int len) {
  36         return len > 0 && styler[pos] == '#';
  37 }
  38
  39 enum literalsAllowed { litNone=0, litU=1, litB=2};
  40
  41 static bool IsPyStringTypeChar(int ch, literalsAllowed allowed) {
  42         return
  43                 ((allowed & litB) && (ch == 'b' || ch == 'B')) ||
  44                 ((allowed & litU) && (ch == 'u' || ch == 'U'));
  45 }
  46
  47 static bool IsPyStringStart(int ch, int chNext, int chNext2, literalsAllowed allowed) {
  48         if (ch == '\'' || ch == '"')
  49                 return true;
  50         if (IsPyStringTypeChar(ch, allowed)) {
  51                 if (chNext == '"' || chNext == '\'')
  52                         return true;
  53                 if ((chNext == 'r' || chNext == 'R') && (chNext2 == '"' || chNext2 == '\''))
  54                         return true;
  55         }
  56         if ((ch == 'r' || ch == 'R') && (chNext == '"' || chNext == '\''))
  57                 return true;
  58
  59         return false;
  60 }
  61
  62 /* Return the state to use for the string starting at i; *nextIndex will be set to the first index following the quote(s) */
  63 static int GetPyStringState(Accessor &styler, int i, unsigned int *nextIndex, literalsAllowed allowed) {
  64         char ch = styler.SafeGetCharAt(i);
  65         char chNext = styler.SafeGetCharAt(i + 1);
  66
  67         // Advance beyond r, u, or ur prefix (or r, b, or br in Python 3.0), but bail if there are any unexpected chars
  68         if (ch == 'r' || ch == 'R') {
  69                 i++;
  70                 ch = styler.SafeGetCharAt(i);
  71                 chNext = styler.SafeGetCharAt(i + 1);
  72         } else if (IsPyStringTypeChar(ch, allowed)) {
  73                 if (chNext == 'r' || chNext == 'R')
  74                         i += 2;
  75                 else
  76                         i += 1;
  77                 ch = styler.SafeGetCharAt(i);
  78                 chNext = styler.SafeGetCharAt(i + 1);
  79         }
  80
  81         if (ch != '"' && ch != '\'') {
  82                 *nextIndex = i + 1;
  83                 return SCE_P_DEFAULT;
  84         }
  85
  86         if (ch == chNext && ch == styler.SafeGetCharAt(i + 2)) {
  87                 *nextIndex = i + 3;
  88
  89                 if (ch == '"')
  90                         return SCE_P_TRIPLEDOUBLE;
  91                 else
  92                         return SCE_P_TRIPLE;
  93         } else {
  94                 *nextIndex = i + 1;
  95
  96                 if (ch == '"')
  97                         return SCE_P_STRING;
  98                 else
  99                         return SCE_P_CHARACTER;
 100         }
 101 }
 102
 103 static inline bool IsAWordChar(int ch) {
 104         return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
 105 }
 106
 107 static inline bool IsAWordStart(int ch) {
 108         return (ch < 0x80) && (isalnum(ch) || ch == '_');
 109 }
 110
 111 static void ColourisePyDoc(unsigned int startPos, int length, int initStyle,
 112         WordList *keywordlists[], Accessor &styler) {
 113
 114         int endPos = startPos + length;
 115
 116         // Backtrack to previous line in case need to fix its tab whinging
 117         int lineCurrent = styler.GetLine(startPos);
 118         if (startPos > 0) {
 119                 if (lineCurrent > 0) {
 120                         lineCurrent--;
 121                         // Look for backslash-continued lines
 122                         while (lineCurrent > 0) {
 123                                 int eolPos = styler.LineStart(lineCurrent) - 1;
 124                                 int eolStyle = styler.StyleAt(eolPos);
 125                                 if (eolStyle == SCE_P_STRING
 126                                     || eolStyle == SCE_P_CHARACTER
 127                                     || eolStyle == SCE_P_STRINGEOL) {
 128                                         lineCurrent -= 1;
 129                                 } else {
 130                                         break;
 131                                 }
 132                         }
 133                         startPos = styler.LineStart(lineCurrent);
 134                 }
 135                 initStyle = startPos == 0 ? SCE_P_DEFAULT : styler.StyleAt(startPos - 1);
 136         }
 137
 138         WordList &keywords = *keywordlists[0];
 139         WordList &keywords2 = *keywordlists[1];
 140
 141         // property tab.timmy.whinge.level
 142         //      For Python code, checks whether indenting is consistent.
 143         //      The default, 0 turns off indentation checking,
 144         //      1 checks whether each line is potentially inconsistent with the previous line,
 145         //      2 checks whether any space characters occur before a tab character in the indentation,
 146         //      3 checks whether any spaces are in the indentation, and
 147         //      4 checks for any tab characters in the indentation.
 148         //      1 is a good level to use.
 149         const int whingeLevel = styler.GetPropertyInt("tab.timmy.whinge.level");
 150
 151         // property lexer.python.literals.binary
 152         //      Set to 0 to not recognise Python 3 binary and octal literals: 0b1011 0o712.
 153         bool base2or8Literals = styler.GetPropertyInt("lexer.python.literals.binary", 1) != 0;
 154
 155         // property lexer.python.strings.u
 156         //      Set to 0 to not recognise Python Unicode literals u"x" as used before Python 3.
 157         literalsAllowed allowedLiterals = (styler.GetPropertyInt("lexer.python.strings.u", 1)) ? litU : litNone;
 158
 159         // property lexer.python.strings.b
 160         //      Set to 0 to not recognise Python 3 bytes literals b"x".
 161         if (styler.GetPropertyInt("lexer.python.strings.b", 1))
 162                 allowedLiterals = static_cast<literalsAllowed>(allowedLiterals | litB);
 163
 164         // property lexer.python.strings.over.newline
 165         //      Set to 1 to allow strings to span newline characters.
 166         bool stringsOverNewline = styler.GetPropertyInt("lexer.python.strings.over.newline") != 0;
 167
 168         initStyle = initStyle & 31;
 169         if (initStyle == SCE_P_STRINGEOL) {
 170                 initStyle = SCE_P_DEFAULT;
 171         }
 172
 173         kwType kwLast = kwOther;
 174         int spaceFlags = 0;
 175         styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
 176         bool base_n_number = false;
 177
 178         StyleContext sc(startPos, endPos - startPos, initStyle, styler);
 179
 180         bool indentGood = true;
 181         int startIndicator = sc.currentPos;
 182         bool inContinuedString = false;
 183
 184         for (; sc.More(); sc.Forward()) {
 185
 186                 if (sc.atLineStart) {
 187                         styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
 188                         indentGood = true;
 189                         if (whingeLevel == 1) {
 190                                 indentGood = (spaceFlags & wsInconsistent) == 0;
 191                         } else if (whingeLevel == 2) {
 192                                 indentGood = (spaceFlags & wsSpaceTab) == 0;
 193                         } else if (whingeLevel == 3) {
 194                                 indentGood = (spaceFlags & wsSpace) == 0;
 195                         } else if (whingeLevel == 4) {
 196                                 indentGood = (spaceFlags & wsTab) == 0;
 197                         }
 198                         if (!indentGood) {
 199                                 styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 0);
 200                                 startIndicator = sc.currentPos;
 201                         }
 202                 }
 203
 204                 if (sc.atLineEnd) {
 205                         if ((sc.state == SCE_P_DEFAULT) ||
 206                                 (sc.state == SCE_P_TRIPLE) ||
 207                                 (sc.state == SCE_P_TRIPLEDOUBLE)) {
 208                                 // Perform colourisation of white space and triple quoted strings at end of each line to allow
 209                                 // tab marking to work inside white space and triple quoted strings
 210                                 sc.SetState(sc.state);
 211                         }
 212                         lineCurrent++;
 213                         if ((sc.state == SCE_P_STRING) || (sc.state == SCE_P_CHARACTER)) {
 214                                 if (inContinuedString || stringsOverNewline) {
 215                                         inContinuedString = false;
 216                                 } else {
 217                                         sc.ChangeState(SCE_P_STRINGEOL);
 218                                         sc.ForwardSetState(SCE_P_DEFAULT);
 219                                 }
 220                         }
 221                         if (!sc.More())
 222                                 break;
 223                 }
 224
 225                 bool needEOLCheck = false;
 226
 227                 // Check for a state end
 228                 if (sc.state == SCE_P_OPERATOR) {
 229                         kwLast = kwOther;
 230                         sc.SetState(SCE_P_DEFAULT);
 231                 } else if (sc.state == SCE_P_NUMBER) {
 232                         if (!IsAWordChar(sc.ch) &&
 233                                 !(!base_n_number && ((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E')))) {
 234                                 sc.SetState(SCE_P_DEFAULT);
 235                         }
 236                 } else if (sc.state == SCE_P_IDENTIFIER) {
 237                         if ((sc.ch == '.') || (!IsAWordChar(sc.ch))) {
 238                                 char s[100];
 239                                 sc.GetCurrent(s, sizeof(s));
 240                                 int style = SCE_P_IDENTIFIER;
 241                                 if ((kwLast == kwImport) && (strcmp(s, "as") == 0)) {
 242                                         style = SCE_P_WORD;
 243                                 } else if (keywords.InList(s)) {
 244                                         style = SCE_P_WORD;
 245                                 } else if (kwLast == kwClass) {
 246                                         style = SCE_P_CLASSNAME;
 247                                 } else if (kwLast == kwDef) {
 248                                         style = SCE_P_DEFNAME;
 249                                 } else if (kwLast == kwCDef || kwLast == kwCPDef) {
 250                                         int pos = sc.currentPos;
 251                                         unsigned char ch = styler.SafeGetCharAt(pos, '\0');
 252                                         while (ch != '\0') {
 253                                                 if (ch == '(') {
 254                                                         style = SCE_P_DEFNAME;
 255                                                         break;
 256                                                 } else if (ch == ':') {
 257                                                         style = SCE_P_CLASSNAME;
 258                                                         break;
 259                                                 } else if (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r') {
 260                                                         pos++;
 261                                                         ch = styler.SafeGetCharAt(pos, '\0');
 262                                                 } else {
 263                                                         break;
 264                                                 }
 265                                         }
 266                                 } else if (keywords2.InList(s)) {
 267                                         style = SCE_P_WORD2;
 268                                 }
 269                                 sc.ChangeState(style);
 270                                 sc.SetState(SCE_P_DEFAULT);
 271                                 if (style == SCE_P_WORD) {
 272                                         if (0 == strcmp(s, "class"))
 273                                                 kwLast = kwClass;
 274                                         else if (0 == strcmp(s, "def"))
 275                                                 kwLast = kwDef;
 276                                         else if (0 == strcmp(s, "import"))
 277                                                 kwLast = kwImport;
 278                                         else if (0 == strcmp(s, "cdef"))
 279                                                 kwLast = kwCDef;
 280                                         else if (0 == strcmp(s, "cpdef"))
 281                                                 kwLast = kwCPDef;
 282                                         else if (0 == strcmp(s, "cimport"))
 283                                                 kwLast = kwImport;
 284                                         else if (kwLast != kwCDef && kwLast != kwCPDef)
 285                                                 kwLast = kwOther;
 286                                 } else if (kwLast != kwCDef && kwLast != kwCPDef) {
 287                                         kwLast = kwOther;
 288                                 }
 289                         }
 290                 } else if ((sc.state == SCE_P_COMMENTLINE) || (sc.state == SCE_P_COMMENTBLOCK)) {
 291                         if (sc.ch == '\r' || sc.ch == '\n') {
 292                                 sc.SetState(SCE_P_DEFAULT);
 293                         }
 294                 } else if (sc.state == SCE_P_DECORATOR) {
 295                         if (!IsAWordChar(sc.ch)) {
 296                                 sc.SetState(SCE_P_DEFAULT);
 297                         }
 298                 } else if ((sc.state == SCE_P_STRING) || (sc.state == SCE_P_CHARACTER)) {
 299                         if (sc.ch == '\\') {
 300                                 if ((sc.chNext == '\r') && (sc.GetRelative(2) == '\n')) {
 301                                         sc.Forward();
 302                                 }
 303                                 if (sc.chNext == '\n' || sc.chNext == '\r') {
 304                                         inContinuedString = true;
 305                                 } else {
 306                                         // Don't roll over the newline.
 307                                         sc.Forward();
 308                                 }
 309                         } else if ((sc.state == SCE_P_STRING) && (sc.ch == '\"')) {
 310                                 sc.ForwardSetState(SCE_P_DEFAULT);
 311                                 needEOLCheck = true;
 312                         } else if ((sc.state == SCE_P_CHARACTER) && (sc.ch == '\'')) {
 313                                 sc.ForwardSetState(SCE_P_DEFAULT);
 314                                 needEOLCheck = true;
 315                         }
 316                 } else if (sc.state == SCE_P_TRIPLE) {
 317                         if (sc.ch == '\\') {
 318                                 sc.Forward();
 319                         } else if (sc.Match("\'\'\'")) {
 320                                 sc.Forward();
 321                                 sc.Forward();
 322                                 sc.ForwardSetState(SCE_P_DEFAULT);
 323                                 needEOLCheck = true;
 324                         }
 325                 } else if (sc.state == SCE_P_TRIPLEDOUBLE) {
 326                         if (sc.ch == '\\') {
 327                                 sc.Forward();
 328                         } else if (sc.Match("\"\"\"")) {
 329                                 sc.Forward();
 330                                 sc.Forward();
 331                                 sc.ForwardSetState(SCE_P_DEFAULT);
 332                                 needEOLCheck = true;
 333                         }
 334                 }
 335
 336                 if (!indentGood && !IsASpaceOrTab(sc.ch)) {
 337                         styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 1);
 338                         startIndicator = sc.currentPos;
 339                         indentGood = true;
 340                 }
 341
 342                 // One cdef or cpdef line, clear kwLast only at end of line
 343                 if ((kwLast == kwCDef || kwLast == kwCPDef) && sc.atLineEnd) {
 344                         kwLast = kwOther;
 345                 }
 346
 347                 // State exit code may have moved on to end of line
 348                 if (needEOLCheck && sc.atLineEnd) {
 349                         lineCurrent++;
 350                         styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
 351                         if (!sc.More())
 352                                 break;
 353                 }
 354
 355                 // Check for a new state starting character
 356                 if (sc.state == SCE_P_DEFAULT) {
 357                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 358                                 if (sc.ch == '0' && (sc.chNext == 'x' || sc.chNext == 'X')) {
 359                                         base_n_number = true;
 360                                         sc.SetState(SCE_P_NUMBER);
 361                                 } else if (sc.ch == '0' &&
 362                                         (sc.chNext == 'o' || sc.chNext == 'O' || sc.chNext == 'b' || sc.chNext == 'B')) {
 363                                         if (base2or8Literals) {
 364                                                 base_n_number = true;
 365                                                 sc.SetState(SCE_P_NUMBER);
 366                                         } else {
 367                                                 sc.SetState(SCE_P_NUMBER);
 368                                                 sc.ForwardSetState(SCE_P_IDENTIFIER);
 369                                         }
 370                                 } else {
 371                                         base_n_number = false;
 372                                         sc.SetState(SCE_P_NUMBER);
 373                                 }
 374                         } else if ((isascii(sc.ch) && isoperator(static_cast<char>(sc.ch))) || sc.ch == '`') {
 375                                 sc.SetState(SCE_P_OPERATOR);
 376                         } else if (sc.ch == '#') {
 377                                 sc.SetState(sc.chNext == '#' ? SCE_P_COMMENTBLOCK : SCE_P_COMMENTLINE);
 378                         } else if (sc.ch == '@') {
 379                                 sc.SetState(SCE_P_DECORATOR);
 380                         } else if (IsPyStringStart(sc.ch, sc.chNext, sc.GetRelative(2), allowedLiterals)) {
 381                                 unsigned int nextIndex = 0;
 382                                 sc.SetState(GetPyStringState(styler, sc.currentPos, &nextIndex, allowedLiterals));
 383                                 while (nextIndex > (sc.currentPos + 1) && sc.More()) {
 384                                         sc.Forward();
 385                                 }
 386                         } else if (IsAWordStart(sc.ch)) {
 387                                 sc.SetState(SCE_P_IDENTIFIER);
 388                         }
 389                 }
 390         }
 391         styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 0);
 392         sc.Complete();
 393 }
 394
 395 static bool IsCommentLine(int line, Accessor &styler) {
 396         int pos = styler.LineStart(line);
 397         int eol_pos = styler.LineStart(line + 1) - 1;
 398         for (int i = pos; i < eol_pos; i++) {
 399                 char ch = styler[i];
 400                 if (ch == '#')
 401                         return true;
 402                 else if (ch != ' ' && ch != '\t')
 403                         return false;
 404         }
 405         return false;
 406 }
 407
 408 static bool IsQuoteLine(int line, Accessor &styler) {
 409         int style = styler.StyleAt(styler.LineStart(line)) & 31;
 410         return ((style == SCE_P_TRIPLE) || (style == SCE_P_TRIPLEDOUBLE));
 411 }
 412
 413
 414 static void FoldPyDoc(unsigned int startPos, int length, int /*initStyle - unused*/,
 415                       WordList *[], Accessor &styler) {
 416         const int maxPos = startPos + length;
 417         const int maxLines = styler.GetLine(maxPos - 1);             // Requested last line
 418         const int docLines = styler.GetLine(styler.Length() - 1);  // Available last line
 419
 420         // property fold.comment.python
 421         //      This option enables folding multi-line comments when using the Python lexer.
 422         const bool foldComment = styler.GetPropertyInt("fold.comment.python") != 0;
 423
 424         // property fold.quotes.python
 425         //      This option enables folding multi-line quoted strings when using the Python lexer.
 426         const bool foldQuotes = styler.GetPropertyInt("fold.quotes.python") != 0;
 427
 428         const bool foldCompact = styler.GetPropertyInt("fold.compact") != 0;
 429
 430         // Backtrack to previous non-blank line so we can determine indent level
 431         // for any white space lines (needed esp. within triple quoted strings)
 432         // and so we can fix any preceding fold level (which is why we go back
 433         // at least one line in all cases)
 434         int spaceFlags = 0;
 435         int lineCurrent = styler.GetLine(startPos);
 436         int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, NULL);
 437         while (lineCurrent > 0) {
 438                 lineCurrent--;
 439                 indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, NULL);
 440                 if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG) &&
 441                         (!IsCommentLine(lineCurrent, styler)) &&
 442                         (!IsQuoteLine(lineCurrent, styler)))
 443                         break;
 444         }
 445         int indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
 446
 447         // Set up initial loop state
 448         startPos = styler.LineStart(lineCurrent);
 449         int prev_state = SCE_P_DEFAULT & 31;
 450         if (lineCurrent >= 1)
 451                 prev_state = styler.StyleAt(startPos - 1) & 31;
 452         int prevQuote = foldQuotes && ((prev_state == SCE_P_TRIPLE) || (prev_state == SCE_P_TRIPLEDOUBLE));
 453         int prevComment = 0;
 454         if (lineCurrent >= 1)
 455                 prevComment = foldComment && IsCommentLine(lineCurrent - 1, styler);
 456
 457         // Process all characters to end of requested range or end of any triple quote
 458         // or comment that hangs over the end of the range.  Cap processing in all cases
 459         // to end of document (in case of unclosed quote or comment at end).
 460         while ((lineCurrent <= docLines) && ((lineCurrent <= maxLines) || prevQuote || prevComment)) {
 461
 462                 // Gather info
 463                 int lev = indentCurrent;
 464                 int lineNext = lineCurrent + 1;
 465                 int indentNext = indentCurrent;
 466                 int quote = false;
 467                 if (lineNext <= docLines) {
 468                         // Information about next line is only available if not at end of document
 469                         indentNext = styler.IndentAmount(lineNext, &spaceFlags, NULL);
 470                         int style = styler.StyleAt(styler.LineStart(lineNext)) & 31;
 471                         quote = foldQuotes && ((style == SCE_P_TRIPLE) || (style == SCE_P_TRIPLEDOUBLE));
 472                 }
 473                 const int quote_start = (quote && !prevQuote);
 474                 const int quote_continue = (quote && prevQuote);
 475                 const int comment = foldComment && IsCommentLine(lineCurrent, styler);
 476                 const int comment_start = (comment && !prevComment && (lineNext <= docLines) &&
 477                                            IsCommentLine(lineNext, styler) && (lev > SC_FOLDLEVELBASE));
 478                 const int comment_continue = (comment && prevComment);
 479                 if ((!quote || !prevQuote) && !comment)
 480                         indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
 481                 if (quote)
 482                         indentNext = indentCurrentLevel;
 483                 if (indentNext & SC_FOLDLEVELWHITEFLAG)
 484                         indentNext = SC_FOLDLEVELWHITEFLAG | indentCurrentLevel;
 485
 486                 if (quote_start) {
 487                         // Place fold point at start of triple quoted string
 488                         lev |= SC_FOLDLEVELHEADERFLAG;
 489                 } else if (quote_continue || prevQuote) {
 490                         // Add level to rest of lines in the string
 491                         lev = lev + 1;
 492                 } else if (comment_start) {
 493                         // Place fold point at start of a block of comments
 494                         lev |= SC_FOLDLEVELHEADERFLAG;
 495                 } else if (comment_continue) {
 496                         // Add level to rest of lines in the block
 497                         lev = lev + 1;
 498                 }
 499
 500                 // Skip past any blank lines for next indent level info; we skip also
 501                 // comments (all comments, not just those starting in column 0)
 502                 // which effectively folds them into surrounding code rather
 503                 // than screwing up folding.
 504
 505                 while (!quote &&
 506                         (lineNext < docLines) &&
 507                         ((indentNext & SC_FOLDLEVELWHITEFLAG) ||
 508                          (lineNext <= docLines && IsCommentLine(lineNext, styler)))) {
 509
 510                         lineNext++;
 511                         indentNext = styler.IndentAmount(lineNext, &spaceFlags, NULL);
 512                 }
 513
 514                 const int levelAfterComments = indentNext & SC_FOLDLEVELNUMBERMASK;
 515                 const int levelBeforeComments = Maximum(indentCurrentLevel,levelAfterComments);
 516
 517                 // Now set all the indent levels on the lines we skipped
 518                 // Do this from end to start.  Once we encounter one line
 519                 // which is indented more than the line after the end of
 520                 // the comment-block, use the level of the block before
 521
 522                 int skipLine = lineNext;
 523                 int skipLevel = levelAfterComments;
 524
 525                 while (--skipLine > lineCurrent) {
 526                         int skipLineIndent = styler.IndentAmount(skipLine, &spaceFlags, NULL);
 527
 528                         if (foldCompact) {
 529                                 if ((skipLineIndent & SC_FOLDLEVELNUMBERMASK) > levelAfterComments)
 530                                         skipLevel = levelBeforeComments;
 531
 532                                 int whiteFlag = skipLineIndent & SC_FOLDLEVELWHITEFLAG;
 533
 534                                 styler.SetLevel(skipLine, skipLevel | whiteFlag);
 535                         } else {
 536                                 if ((skipLineIndent & SC_FOLDLEVELNUMBERMASK) > levelAfterComments &&
 537                                         !(skipLineIndent & SC_FOLDLEVELWHITEFLAG) &&
 538                                         !IsCommentLine(skipLine, styler))
 539                                         skipLevel = levelBeforeComments;
 540
 541                                 styler.SetLevel(skipLine, skipLevel);
 542                         }
 543                 }
 544
 545                 // Set fold header on non-quote/non-comment line
 546                 if (!quote && !comment && !(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
 547                         if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK))
 548                                 lev |= SC_FOLDLEVELHEADERFLAG;
 549                 }
 550
 551                 // Keep track of triple quote and block comment state of previous line
 552                 prevQuote = quote;
 553                 prevComment = comment_start || comment_continue;
 554
 555                 // Set fold level for this line and move to next line
 556                 styler.SetLevel(lineCurrent, lev);
 557                 indentCurrent = indentNext;
 558                 lineCurrent = lineNext;
 559         }
 560
 561         // NOTE: Cannot set level of last line here because indentCurrent doesn't have
 562         // header flag set; the loop above is crafted to take care of this case!
 563         //styler.SetLevel(lineCurrent, indentCurrent);
 564 }
 565
 566 static const char *const pythonWordListDesc[] = {
 567         "Keywords",
 568         "Highlighted identifiers",
 569         0
 570 };
 571
 572 LexerModule lmPython(SCLEX_PYTHON, ColourisePyDoc, "python", FoldPyDoc,
 573                                          pythonWordListDesc);
 574