src/stc/scintilla/lexers/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         // property lexer.python.keywords2.no.sub.identifiers
 169         //      When enabled, it will not style keywords2 items that are used as a sub-identifier.
 170         //      Example: when set, will not highlight "foo.open" when "open" is a keywords2 item.
 171         const bool keywords2NoSubIdentifiers = styler.GetPropertyInt("lexer.python.keywords2.no.sub.identifiers") != 0;
 172
 173         initStyle = initStyle & 31;
 174         if (initStyle == SCE_P_STRINGEOL) {
 175                 initStyle = SCE_P_DEFAULT;
 176         }
 177
 178         kwType kwLast = kwOther;
 179         int spaceFlags = 0;
 180         styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
 181         bool base_n_number = false;
 182
 183         StyleContext sc(startPos, endPos - startPos, initStyle, styler);
 184
 185         bool indentGood = true;
 186         int startIndicator = sc.currentPos;
 187         bool inContinuedString = false;
 188
 189         for (; sc.More(); sc.Forward()) {
 190
 191                 if (sc.atLineStart) {
 192                         styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
 193                         indentGood = true;
 194                         if (whingeLevel == 1) {
 195                                 indentGood = (spaceFlags & wsInconsistent) == 0;
 196                         } else if (whingeLevel == 2) {
 197                                 indentGood = (spaceFlags & wsSpaceTab) == 0;
 198                         } else if (whingeLevel == 3) {
 199                                 indentGood = (spaceFlags & wsSpace) == 0;
 200                         } else if (whingeLevel == 4) {
 201                                 indentGood = (spaceFlags & wsTab) == 0;
 202                         }
 203                         if (!indentGood) {
 204                                 styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 0);
 205                                 startIndicator = sc.currentPos;
 206                         }
 207                 }
 208
 209                 if (sc.atLineEnd) {
 210                         if ((sc.state == SCE_P_DEFAULT) ||
 211                                 (sc.state == SCE_P_TRIPLE) ||
 212                                 (sc.state == SCE_P_TRIPLEDOUBLE)) {
 213                                 // Perform colourisation of white space and triple quoted strings at end of each line to allow
 214                                 // tab marking to work inside white space and triple quoted strings
 215                                 sc.SetState(sc.state);
 216                         }
 217                         lineCurrent++;
 218                         if ((sc.state == SCE_P_STRING) || (sc.state == SCE_P_CHARACTER)) {
 219                                 if (inContinuedString || stringsOverNewline) {
 220                                         inContinuedString = false;
 221                                 } else {
 222                                         sc.ChangeState(SCE_P_STRINGEOL);
 223                                         sc.ForwardSetState(SCE_P_DEFAULT);
 224                                 }
 225                         }
 226                         if (!sc.More())
 227                                 break;
 228                 }
 229
 230                 bool needEOLCheck = false;
 231
 232                 // Check for a state end
 233                 if (sc.state == SCE_P_OPERATOR) {
 234                         kwLast = kwOther;
 235                         sc.SetState(SCE_P_DEFAULT);
 236                 } else if (sc.state == SCE_P_NUMBER) {
 237                         if (!IsAWordChar(sc.ch) &&
 238                                 !(!base_n_number && ((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E')))) {
 239                                 sc.SetState(SCE_P_DEFAULT);
 240                         }
 241                 } else if (sc.state == SCE_P_IDENTIFIER) {
 242                         if ((sc.ch == '.') || (!IsAWordChar(sc.ch))) {
 243                                 char s[100];
 244                                 sc.GetCurrent(s, sizeof(s));
 245                                 int style = SCE_P_IDENTIFIER;
 246                                 if ((kwLast == kwImport) && (strcmp(s, "as") == 0)) {
 247                                         style = SCE_P_WORD;
 248                                 } else if (keywords.InList(s)) {
 249                                         style = SCE_P_WORD;
 250                                 } else if (kwLast == kwClass) {
 251                                         style = SCE_P_CLASSNAME;
 252                                 } else if (kwLast == kwDef) {
 253                                         style = SCE_P_DEFNAME;
 254                                 } else if (kwLast == kwCDef || kwLast == kwCPDef) {
 255                                         int pos = sc.currentPos;
 256                                         unsigned char ch = styler.SafeGetCharAt(pos, '\0');
 257                                         while (ch != '\0') {
 258                                                 if (ch == '(') {
 259                                                         style = SCE_P_DEFNAME;
 260                                                         break;
 261                                                 } else if (ch == ':') {
 262                                                         style = SCE_P_CLASSNAME;
 263                                                         break;
 264                                                 } else if (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r') {
 265                                                         pos++;
 266                                                         ch = styler.SafeGetCharAt(pos, '\0');
 267                                                 } else {
 268                                                         break;
 269                                                 }
 270                                         }
 271                                 } else if (keywords2.InList(s)) {
 272                                         if (keywords2NoSubIdentifiers) {
 273                                                 // We don't want to highlight keywords2
 274                                                 // that are used as a sub-identifier,
 275                                                 // i.e. not open in "foo.open".
 276                                                 int pos = styler.GetStartSegment() - 1;
 277                                                 if (pos < 0 || (styler.SafeGetCharAt(pos, '\0') != '.'))
 278                                                         style = SCE_P_WORD2;
 279                                         } else {
 280                                                 style = SCE_P_WORD2;
 281                                         }
 282                                 }
 283                                 sc.ChangeState(style);
 284                                 sc.SetState(SCE_P_DEFAULT);
 285                                 if (style == SCE_P_WORD) {
 286                                         if (0 == strcmp(s, "class"))
 287                                                 kwLast = kwClass;
 288                                         else if (0 == strcmp(s, "def"))
 289                                                 kwLast = kwDef;
 290                                         else if (0 == strcmp(s, "import"))
 291                                                 kwLast = kwImport;
 292                                         else if (0 == strcmp(s, "cdef"))
 293                                                 kwLast = kwCDef;
 294                                         else if (0 == strcmp(s, "cpdef"))
 295                                                 kwLast = kwCPDef;
 296                                         else if (0 == strcmp(s, "cimport"))
 297                                                 kwLast = kwImport;
 298                                         else if (kwLast != kwCDef && kwLast != kwCPDef)
 299                                                 kwLast = kwOther;
 300                                 } else if (kwLast != kwCDef && kwLast != kwCPDef) {
 301                                         kwLast = kwOther;
 302                                 }
 303                         }
 304                 } else if ((sc.state == SCE_P_COMMENTLINE) || (sc.state == SCE_P_COMMENTBLOCK)) {
 305                         if (sc.ch == '\r' || sc.ch == '\n') {
 306                                 sc.SetState(SCE_P_DEFAULT);
 307                         }
 308                 } else if (sc.state == SCE_P_DECORATOR) {
 309                         if (!IsAWordChar(sc.ch)) {
 310                                 sc.SetState(SCE_P_DEFAULT);
 311                         }
 312                 } else if ((sc.state == SCE_P_STRING) || (sc.state == SCE_P_CHARACTER)) {
 313                         if (sc.ch == '\\') {
 314                                 if ((sc.chNext == '\r') && (sc.GetRelative(2) == '\n')) {
 315                                         sc.Forward();
 316                                 }
 317                                 if (sc.chNext == '\n' || sc.chNext == '\r') {
 318                                         inContinuedString = true;
 319                                 } else {
 320                                         // Don't roll over the newline.
 321                                         sc.Forward();
 322                                 }
 323                         } else if ((sc.state == SCE_P_STRING) && (sc.ch == '\"')) {
 324                                 sc.ForwardSetState(SCE_P_DEFAULT);
 325                                 needEOLCheck = true;
 326                         } else if ((sc.state == SCE_P_CHARACTER) && (sc.ch == '\'')) {
 327                                 sc.ForwardSetState(SCE_P_DEFAULT);
 328                                 needEOLCheck = true;
 329                         }
 330                 } else if (sc.state == SCE_P_TRIPLE) {
 331                         if (sc.ch == '\\') {
 332                                 sc.Forward();
 333                         } else if (sc.Match("\'\'\'")) {
 334                                 sc.Forward();
 335                                 sc.Forward();
 336                                 sc.ForwardSetState(SCE_P_DEFAULT);
 337                                 needEOLCheck = true;
 338                         }
 339                 } else if (sc.state == SCE_P_TRIPLEDOUBLE) {
 340                         if (sc.ch == '\\') {
 341                                 sc.Forward();
 342                         } else if (sc.Match("\"\"\"")) {
 343                                 sc.Forward();
 344                                 sc.Forward();
 345                                 sc.ForwardSetState(SCE_P_DEFAULT);
 346                                 needEOLCheck = true;
 347                         }
 348                 }
 349
 350                 if (!indentGood && !IsASpaceOrTab(sc.ch)) {
 351                         styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 1);
 352                         startIndicator = sc.currentPos;
 353                         indentGood = true;
 354                 }
 355
 356                 // One cdef or cpdef line, clear kwLast only at end of line
 357                 if ((kwLast == kwCDef || kwLast == kwCPDef) && sc.atLineEnd) {
 358                         kwLast = kwOther;
 359                 }
 360
 361                 // State exit code may have moved on to end of line
 362                 if (needEOLCheck && sc.atLineEnd) {
 363                         lineCurrent++;
 364                         styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
 365                         if (!sc.More())
 366                                 break;
 367                 }
 368
 369                 // Check for a new state starting character
 370                 if (sc.state == SCE_P_DEFAULT) {
 371                         if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 372                                 if (sc.ch == '0' && (sc.chNext == 'x' || sc.chNext == 'X')) {
 373                                         base_n_number = true;
 374                                         sc.SetState(SCE_P_NUMBER);
 375                                 } else if (sc.ch == '0' &&
 376                                         (sc.chNext == 'o' || sc.chNext == 'O' || sc.chNext == 'b' || sc.chNext == 'B')) {
 377                                         if (base2or8Literals) {
 378                                                 base_n_number = true;
 379                                                 sc.SetState(SCE_P_NUMBER);
 380                                         } else {
 381                                                 sc.SetState(SCE_P_NUMBER);
 382                                                 sc.ForwardSetState(SCE_P_IDENTIFIER);
 383                                         }
 384                                 } else {
 385                                         base_n_number = false;
 386                                         sc.SetState(SCE_P_NUMBER);
 387                                 }
 388                         } else if ((isascii(sc.ch) && isoperator(static_cast<char>(sc.ch))) || sc.ch == '`') {
 389                                 sc.SetState(SCE_P_OPERATOR);
 390                         } else if (sc.ch == '#') {
 391                                 sc.SetState(sc.chNext == '#' ? SCE_P_COMMENTBLOCK : SCE_P_COMMENTLINE);
 392                         } else if (sc.ch == '@') {
 393                                 sc.SetState(SCE_P_DECORATOR);
 394                         } else if (IsPyStringStart(sc.ch, sc.chNext, sc.GetRelative(2), allowedLiterals)) {
 395                                 unsigned int nextIndex = 0;
 396                                 sc.SetState(GetPyStringState(styler, sc.currentPos, &nextIndex, allowedLiterals));
 397                                 while (nextIndex > (sc.currentPos + 1) && sc.More()) {
 398                                         sc.Forward();
 399                                 }
 400                         } else if (IsAWordStart(sc.ch)) {
 401                                 sc.SetState(SCE_P_IDENTIFIER);
 402                         }
 403                 }
 404         }
 405         styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 0);
 406         sc.Complete();
 407 }
 408
 409 static bool IsCommentLine(int line, Accessor &styler) {
 410         int pos = styler.LineStart(line);
 411         int eol_pos = styler.LineStart(line + 1) - 1;
 412         for (int i = pos; i < eol_pos; i++) {
 413                 char ch = styler[i];
 414                 if (ch == '#')
 415                         return true;
 416                 else if (ch != ' ' && ch != '\t')
 417                         return false;
 418         }
 419         return false;
 420 }
 421
 422 static bool IsQuoteLine(int line, Accessor &styler) {
 423         int style = styler.StyleAt(styler.LineStart(line)) & 31;
 424         return ((style == SCE_P_TRIPLE) || (style == SCE_P_TRIPLEDOUBLE));
 425 }
 426
 427
 428 static void FoldPyDoc(unsigned int startPos, int length, int /*initStyle - unused*/,
 429                       WordList *[], Accessor &styler) {
 430         const int maxPos = startPos + length;
 431         const int maxLines = (maxPos == styler.Length()) ? styler.GetLine(maxPos) : styler.GetLine(maxPos - 1); // Requested last line
 432         const int docLines = styler.GetLine(styler.Length());   // Available last line
 433
 434         // property fold.quotes.python
 435         //      This option enables folding multi-line quoted strings when using the Python lexer.
 436         const bool foldQuotes = styler.GetPropertyInt("fold.quotes.python") != 0;
 437
 438         const bool foldCompact = styler.GetPropertyInt("fold.compact") != 0;
 439
 440         // Backtrack to previous non-blank line so we can determine indent level
 441         // for any white space lines (needed esp. within triple quoted strings)
 442         // and so we can fix any preceding fold level (which is why we go back
 443         // at least one line in all cases)
 444         int spaceFlags = 0;
 445         int lineCurrent = styler.GetLine(startPos);
 446         int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, NULL);
 447         while (lineCurrent > 0) {
 448                 lineCurrent--;
 449                 indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, NULL);
 450                 if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG) &&
 451                         (!IsCommentLine(lineCurrent, styler)) &&
 452                         (!IsQuoteLine(lineCurrent, styler)))
 453                         break;
 454         }
 455         int indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
 456
 457         // Set up initial loop state
 458         startPos = styler.LineStart(lineCurrent);
 459         int prev_state = SCE_P_DEFAULT & 31;
 460         if (lineCurrent >= 1)
 461                 prev_state = styler.StyleAt(startPos - 1) & 31;
 462         int prevQuote = foldQuotes && ((prev_state == SCE_P_TRIPLE) || (prev_state == SCE_P_TRIPLEDOUBLE));
 463
 464         // Process all characters to end of requested range or end of any triple quote
 465         //that hangs over the end of the range.  Cap processing in all cases
 466         // to end of document (in case of unclosed quote at end).
 467         while ((lineCurrent <= docLines) && ((lineCurrent <= maxLines) || prevQuote)) {
 468
 469                 // Gather info
 470                 int lev = indentCurrent;
 471                 int lineNext = lineCurrent + 1;
 472                 int indentNext = indentCurrent;
 473                 int quote = false;
 474                 if (lineNext <= docLines) {
 475                         // Information about next line is only available if not at end of document
 476                         indentNext = styler.IndentAmount(lineNext, &spaceFlags, NULL);
 477                         int lookAtPos = (styler.LineStart(lineNext) == styler.Length()) ? styler.Length() - 1 : styler.LineStart(lineNext);
 478                         int style = styler.StyleAt(lookAtPos) & 31;
 479                         quote = foldQuotes && ((style == SCE_P_TRIPLE) || (style == SCE_P_TRIPLEDOUBLE));
 480                 }
 481                 const int quote_start = (quote && !prevQuote);
 482                 const int quote_continue = (quote && prevQuote);
 483                 if (!quote || !prevQuote)
 484                         indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
 485                 if (quote)
 486                         indentNext = indentCurrentLevel;
 487                 if (indentNext & SC_FOLDLEVELWHITEFLAG)
 488                         indentNext = SC_FOLDLEVELWHITEFLAG | indentCurrentLevel;
 489
 490                 if (quote_start) {
 491                         // Place fold point at start of triple quoted string
 492                         lev |= SC_FOLDLEVELHEADERFLAG;
 493                 } else if (quote_continue || prevQuote) {
 494                         // Add level to rest of lines in the string
 495                         lev = lev + 1;
 496                 }
 497
 498                 // Skip past any blank lines for next indent level info; we skip also
 499                 // comments (all comments, not just those starting in column 0)
 500                 // which effectively folds them into surrounding code rather
 501                 // than screwing up folding.
 502
 503                 while (!quote &&
 504                         (lineNext < docLines) &&
 505                         ((indentNext & SC_FOLDLEVELWHITEFLAG) ||
 506                          (lineNext <= docLines && IsCommentLine(lineNext, styler)))) {
 507
 508                         lineNext++;
 509                         indentNext = styler.IndentAmount(lineNext, &spaceFlags, NULL);
 510                 }
 511
 512                 const int levelAfterComments = indentNext & SC_FOLDLEVELNUMBERMASK;
 513                 const int levelBeforeComments = Maximum(indentCurrentLevel,levelAfterComments);
 514
 515                 // Now set all the indent levels on the lines we skipped
 516                 // Do this from end to start.  Once we encounter one line
 517                 // which is indented more than the line after the end of
 518                 // the comment-block, use the level of the block before
 519
 520                 int skipLine = lineNext;
 521                 int skipLevel = levelAfterComments;
 522
 523                 while (--skipLine > lineCurrent) {
 524                         int skipLineIndent = styler.IndentAmount(skipLine, &spaceFlags, NULL);
 525
 526                         if (foldCompact) {
 527                                 if ((skipLineIndent & SC_FOLDLEVELNUMBERMASK) > levelAfterComments)
 528                                         skipLevel = levelBeforeComments;
 529
 530                                 int whiteFlag = skipLineIndent & SC_FOLDLEVELWHITEFLAG;
 531
 532                                 styler.SetLevel(skipLine, skipLevel | whiteFlag);
 533                         } else {
 534                                 if ((skipLineIndent & SC_FOLDLEVELNUMBERMASK) > levelAfterComments &&
 535                                         !(skipLineIndent & SC_FOLDLEVELWHITEFLAG) &&
 536                                         !IsCommentLine(skipLine, styler))
 537                                         skipLevel = levelBeforeComments;
 538
 539                                 styler.SetLevel(skipLine, skipLevel);
 540                         }
 541                 }
 542
 543                 // Set fold header on non-quote line
 544                 if (!quote && !(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
 545                         if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK))
 546                                 lev |= SC_FOLDLEVELHEADERFLAG;
 547                 }
 548
 549                 // Keep track of triple quote state of previous line
 550                 prevQuote = quote;
 551
 552                 // Set fold level for this line and move to next line
 553                 styler.SetLevel(lineCurrent, foldCompact ? lev : lev & ~SC_FOLDLEVELWHITEFLAG);
 554                 indentCurrent = indentNext;
 555                 lineCurrent = lineNext;
 556         }
 557
 558         // NOTE: Cannot set level of last line here because indentCurrent doesn't have
 559         // header flag set; the loop above is crafted to take care of this case!
 560         //styler.SetLevel(lineCurrent, indentCurrent);
 561 }
 562
 563 static const char *const pythonWordListDesc[] = {
 564         "Keywords",
 565         "Highlighted identifiers",
 566         0
 567 };
 568
 569 LexerModule lmPython(SCLEX_PYTHON, ColourisePyDoc, "python", FoldPyDoc,
 570                                          pythonWordListDesc);
 571