[wxWidgets.git] / src / stc / scintilla / lexers / LexLua.cxx

// Scintilla source code edit control
/** @file LexLua.cxx
 ** Lexer for Lua language.
 **
 ** Written by Paul Winwood.
 ** Folder by Alexey Yutkin.
 ** Modified by Marcos E. Wurzius & Philippe Lhoste
 **/

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>

#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"

#include "WordList.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.h"

#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif

// Test for [=[ ... ]=] delimiters, returns 0 if it's only a [ or ],
// return 1 for [[ or ]], returns >=2 for [=[ or ]=] and so on.
// The maximum number of '=' characters allowed is 254.
static int LongDelimCheck(StyleContext &sc) {
	int sep = 1;
	while (sc.GetRelative(sep) == '=' && sep < 0xFF)
		sep++;
	if (sc.GetRelative(sep) == sc.ch)
		return sep;
	return 0;
}

static void ColouriseLuaDoc(
	unsigned int startPos,
	int length,
	int initStyle,
	WordList *keywordlists[],
	Accessor &styler) {

	WordList &keywords = *keywordlists[0];
	WordList &keywords2 = *keywordlists[1];
	WordList &keywords3 = *keywordlists[2];
	WordList &keywords4 = *keywordlists[3];
	WordList &keywords5 = *keywordlists[4];
	WordList &keywords6 = *keywordlists[5];
	WordList &keywords7 = *keywordlists[6];
	WordList &keywords8 = *keywordlists[7];

	// Accepts accented characters
	CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
	CharacterSet setWord(CharacterSet::setAlphaNum, "_", 0x80, true);
	// Not exactly following number definition (several dots are seen as OK, etc.)
	// but probably enough in most cases. [pP] is for hex floats.
	CharacterSet setNumber(CharacterSet::setDigits, ".-+abcdefpABCDEFP");
	CharacterSet setExponent(CharacterSet::setNone, "eEpP");
	CharacterSet setLuaOperator(CharacterSet::setNone, "*/-+()={}~[];<>,.^%:#");
	CharacterSet setEscapeSkip(CharacterSet::setNone, "\"'\\");

	int currentLine = styler.GetLine(startPos);
	// Initialize long string [[ ... ]] or block comment --[[ ... ]] nesting level,
	// if we are inside such a string. Block comment was introduced in Lua 5.0,
	// blocks with separators [=[ ... ]=] in Lua 5.1.
	// Continuation of a string (\z whitespace escaping) is controlled by stringWs.
	int nestLevel = 0;
	int sepCount = 0;
	int stringWs = 0;
	if (initStyle == SCE_LUA_LITERALSTRING || initStyle == SCE_LUA_COMMENT ||
		initStyle == SCE_LUA_STRING || initStyle == SCE_LUA_CHARACTER) {
		int lineState = styler.GetLineState(currentLine - 1);
		nestLevel = lineState >> 9;
		sepCount = lineState & 0xFF;
		stringWs = lineState & 0x100;
	}

	// Do not leak onto next line
	if (initStyle == SCE_LUA_STRINGEOL || initStyle == SCE_LUA_COMMENTLINE || initStyle == SCE_LUA_PREPROCESSOR) {
		initStyle = SCE_LUA_DEFAULT;
	}

	StyleContext sc(startPos, length, initStyle, styler);
	if (startPos == 0 && sc.ch == '#') {
		// shbang line: # is a comment only if first char of the script
		sc.SetState(SCE_LUA_COMMENTLINE);
	}
	for (; sc.More(); sc.Forward()) {
		if (sc.atLineEnd) {
			// Update the line state, so it can be seen by next line
			currentLine = styler.GetLine(sc.currentPos);
			switch (sc.state) {
			case SCE_LUA_LITERALSTRING:
			case SCE_LUA_COMMENT:
			case SCE_LUA_STRING:
			case SCE_LUA_CHARACTER:
				// Inside a literal string, block comment or string, we set the line state
				styler.SetLineState(currentLine, (nestLevel << 9) | stringWs | sepCount);
				break;
			default:
				// Reset the line state
				styler.SetLineState(currentLine, 0);
				break;
			}
		}
		if (sc.atLineStart && (sc.state == SCE_LUA_STRING)) {
			// Prevent SCE_LUA_STRINGEOL from leaking back to previous line
			sc.SetState(SCE_LUA_STRING);
		}

		// Handle string line continuation
		if ((sc.state == SCE_LUA_STRING || sc.state == SCE_LUA_CHARACTER) &&
				sc.ch == '\\') {
			if (sc.chNext == '\n' || sc.chNext == '\r') {
				sc.Forward();
				if (sc.ch == '\r' && sc.chNext == '\n') {
					sc.Forward();
				}
				continue;
			}
		}

		// Determine if the current state should terminate.
		if (sc.state == SCE_LUA_OPERATOR) {
			if (sc.ch == ':' && sc.chPrev == ':') {	// :: <label> :: forward scan
				sc.Forward();
				int ln = 0, maxln = startPos + length - sc.currentPos;
				int c;
				while (ln < maxln) {		// determine line extent
					c = sc.GetRelative(ln);
					if (c == '\r' || c == '\n')
						break;
					ln++;
				}
				maxln = ln; ln = 0;
				while (ln < maxln) {		// skip over spaces/tabs
					if (!IsASpaceOrTab(sc.GetRelative(ln)))
						break;
					ln++;
				}
				int ws1 = ln;
				if (setWordStart.Contains(sc.GetRelative(ln))) {
					int i = 0;
					char s[100];
					while (ln < maxln) {	// get potential label
						c = sc.GetRelative(ln);
						if (!setWord.Contains(c))
							break;
						if (i < 90)
							s[i++] = c;
						ln++;
					}
					s[i] = '\0'; int lbl = ln;
					if (!keywords.InList(s)) {
						while (ln < maxln) {		// skip over spaces/tabs
							if (!IsASpaceOrTab(sc.GetRelative(ln)))
								break;
							ln++;
						}
						int ws2 = ln - lbl;
						if (sc.GetRelative(ln) == ':' && sc.GetRelative(ln + 1) == ':') {
							// final :: found, complete valid label construct
							sc.ChangeState(SCE_LUA_LABEL);
							if (ws1) {
								sc.SetState(SCE_LUA_DEFAULT);
								sc.Forward(ws1);
							}
							sc.SetState(SCE_LUA_LABEL);
							sc.Forward(lbl - ws1);
							if (ws2) {
								sc.SetState(SCE_LUA_DEFAULT);
								sc.Forward(ws2);
							}
							sc.SetState(SCE_LUA_LABEL);
							sc.Forward(2);
						}
					}
				}
			}
			sc.SetState(SCE_LUA_DEFAULT);
		} else if (sc.state == SCE_LUA_NUMBER) {
			// We stop the number definition on non-numerical non-dot non-eEpP non-sign non-hexdigit char
			if (!setNumber.Contains(sc.ch)) {
				sc.SetState(SCE_LUA_DEFAULT);
			} else if (sc.ch == '-' || sc.ch == '+') {
				if (!setExponent.Contains(sc.chPrev))
					sc.SetState(SCE_LUA_DEFAULT);
			}
		} else if (sc.state == SCE_LUA_IDENTIFIER) {
			if (!(setWord.Contains(sc.ch) || sc.ch == '.') || sc.Match('.', '.')) {
				char s[100];
				sc.GetCurrent(s, sizeof(s));
				if (keywords.InList(s)) {
					sc.ChangeState(SCE_LUA_WORD);
					if (strcmp(s, "goto") == 0) {	// goto <label> forward scan
						sc.SetState(SCE_LUA_DEFAULT);
						while (IsASpaceOrTab(sc.ch) && !sc.atLineEnd)
							sc.Forward();
						if (setWordStart.Contains(sc.ch)) {
							sc.SetState(SCE_LUA_LABEL);
							sc.Forward();
							while (setWord.Contains(sc.ch))
								sc.Forward();
							sc.GetCurrent(s, sizeof(s));
							if (keywords.InList(s))
								sc.ChangeState(SCE_LUA_WORD);
						}
						sc.SetState(SCE_LUA_DEFAULT);
					}
				} else if (keywords2.InList(s)) {
					sc.ChangeState(SCE_LUA_WORD2);
				} else if (keywords3.InList(s)) {
					sc.ChangeState(SCE_LUA_WORD3);
				} else if (keywords4.InList(s)) {
					sc.ChangeState(SCE_LUA_WORD4);
				} else if (keywords5.InList(s)) {
					sc.ChangeState(SCE_LUA_WORD5);
				} else if (keywords6.InList(s)) {
					sc.ChangeState(SCE_LUA_WORD6);
				} else if (keywords7.InList(s)) {
					sc.ChangeState(SCE_LUA_WORD7);
				} else if (keywords8.InList(s)) {
					sc.ChangeState(SCE_LUA_WORD8);
				}
				sc.SetState(SCE_LUA_DEFAULT);
			}
		} else if (sc.state == SCE_LUA_COMMENTLINE || sc.state == SCE_LUA_PREPROCESSOR) {
			if (sc.atLineEnd) {
				sc.ForwardSetState(SCE_LUA_DEFAULT);
			}
		} else if (sc.state == SCE_LUA_STRING) {
			if (stringWs) {
				if (!IsASpace(sc.ch))
					stringWs = 0;
			}
			if (sc.ch == '\\') {
				if (setEscapeSkip.Contains(sc.chNext)) {
					sc.Forward();
				} else if (sc.chNext == 'z') {
					sc.Forward();
					stringWs = 0x100;
				}
			} else if (sc.ch == '\"') {
				sc.ForwardSetState(SCE_LUA_DEFAULT);
			} else if (stringWs == 0 && sc.atLineEnd) {
				sc.ChangeState(SCE_LUA_STRINGEOL);
				sc.ForwardSetState(SCE_LUA_DEFAULT);
			}
		} else if (sc.state == SCE_LUA_CHARACTER) {
			if (stringWs) {
				if (!IsASpace(sc.ch))
					stringWs = 0;
			}
			if (sc.ch == '\\') {
				if (setEscapeSkip.Contains(sc.chNext)) {
					sc.Forward();
				} else if (sc.chNext == 'z') {
					sc.Forward();
					stringWs = 0x100;
				}
			} else if (sc.ch == '\'') {
				sc.ForwardSetState(SCE_LUA_DEFAULT);
			} else if (stringWs == 0 && sc.atLineEnd) {
				sc.ChangeState(SCE_LUA_STRINGEOL);
				sc.ForwardSetState(SCE_LUA_DEFAULT);
			}
		} else if (sc.state == SCE_LUA_LITERALSTRING || sc.state == SCE_LUA_COMMENT) {
			if (sc.ch == '[') {
				int sep = LongDelimCheck(sc);
				if (sep == 1 && sepCount == 1) {    // [[-only allowed to nest
					nestLevel++;
					sc.Forward();
				}
			} else if (sc.ch == ']') {
				int sep = LongDelimCheck(sc);
				if (sep == 1 && sepCount == 1) {    // un-nest with ]]-only
					nestLevel--;
					sc.Forward();
					if (nestLevel == 0) {
						sc.ForwardSetState(SCE_LUA_DEFAULT);
					}
				} else if (sep > 1 && sep == sepCount) {   // ]=]-style delim
					sc.Forward(sep);
					sc.ForwardSetState(SCE_LUA_DEFAULT);
				}
			}
		}

		// Determine if a new state should be entered.
		if (sc.state == SCE_LUA_DEFAULT) {
			if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
				sc.SetState(SCE_LUA_NUMBER);
				if (sc.ch == '0' && toupper(sc.chNext) == 'X') {
					sc.Forward();
				}
			} else if (setWordStart.Contains(sc.ch)) {
				sc.SetState(SCE_LUA_IDENTIFIER);
			} else if (sc.ch == '\"') {
				sc.SetState(SCE_LUA_STRING);
				stringWs = 0;
			} else if (sc.ch == '\'') {
				sc.SetState(SCE_LUA_CHARACTER);
				stringWs = 0;
			} else if (sc.ch == '[') {
				sepCount = LongDelimCheck(sc);
				if (sepCount == 0) {
					sc.SetState(SCE_LUA_OPERATOR);
				} else {
					nestLevel = 1;
					sc.SetState(SCE_LUA_LITERALSTRING);
					sc.Forward(sepCount);
				}
			} else if (sc.Match('-', '-')) {
				sc.SetState(SCE_LUA_COMMENTLINE);
				if (sc.Match("--[")) {
					sc.Forward(2);
					sepCount = LongDelimCheck(sc);
					if (sepCount > 0) {
						nestLevel = 1;
						sc.ChangeState(SCE_LUA_COMMENT);
						sc.Forward(sepCount);
					}
				} else {
					sc.Forward();
				}
			} else if (sc.atLineStart && sc.Match('$')) {
				sc.SetState(SCE_LUA_PREPROCESSOR);	// Obsolete since Lua 4.0, but still in old code
			} else if (setLuaOperator.Contains(sc.ch)) {
				sc.SetState(SCE_LUA_OPERATOR);
			}
		}
	}

	if (setWord.Contains(sc.chPrev) || sc.chPrev == '.') {
		char s[100];
		sc.GetCurrent(s, sizeof(s));
		if (keywords.InList(s)) {
			sc.ChangeState(SCE_LUA_WORD);
		} else if (keywords2.InList(s)) {
			sc.ChangeState(SCE_LUA_WORD2);
		} else if (keywords3.InList(s)) {
			sc.ChangeState(SCE_LUA_WORD3);
		} else if (keywords4.InList(s)) {
			sc.ChangeState(SCE_LUA_WORD4);
		} else if (keywords5.InList(s)) {
			sc.ChangeState(SCE_LUA_WORD5);
		} else if (keywords6.InList(s)) {
			sc.ChangeState(SCE_LUA_WORD6);
		} else if (keywords7.InList(s)) {
			sc.ChangeState(SCE_LUA_WORD7);
		} else if (keywords8.InList(s)) {
			sc.ChangeState(SCE_LUA_WORD8);
		}
	}

	sc.Complete();
}

static void FoldLuaDoc(unsigned int startPos, int length, int /* initStyle */, WordList *[],
                       Accessor &styler) {
	unsigned int lengthDoc = startPos + length;
	int visibleChars = 0;
	int lineCurrent = styler.GetLine(startPos);
	int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
	int levelCurrent = levelPrev;
	char chNext = styler[startPos];
	bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
	int styleNext = styler.StyleAt(startPos);
	char s[10];

	for (unsigned int i = startPos; i < lengthDoc; i++) {
		char ch = chNext;
		chNext = styler.SafeGetCharAt(i + 1);
		int style = styleNext;
		styleNext = styler.StyleAt(i + 1);
		bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
		if (style == SCE_LUA_WORD) {
			if (ch == 'i' || ch == 'd' || ch == 'f' || ch == 'e' || ch == 'r' || ch == 'u') {
				for (unsigned int j = 0; j < 8; j++) {
					if (!iswordchar(styler[i + j])) {
						break;
					}
					s[j] = styler[i + j];
					s[j + 1] = '\0';
				}

				if ((strcmp(s, "if") == 0) || (strcmp(s, "do") == 0) || (strcmp(s, "function") == 0) || (strcmp(s, "repeat") == 0)) {
					levelCurrent++;
				}
				if ((strcmp(s, "end") == 0) || (strcmp(s, "elseif") == 0) || (strcmp(s, "until") == 0)) {
					levelCurrent--;
				}
			}
		} else if (style == SCE_LUA_OPERATOR) {
			if (ch == '{' || ch == '(') {
				levelCurrent++;
			} else if (ch == '}' || ch == ')') {
				levelCurrent--;
			}
		} else if (style == SCE_LUA_LITERALSTRING || style == SCE_LUA_COMMENT) {
			if (ch == '[') {
				levelCurrent++;
			} else if (ch == ']') {
				levelCurrent--;
			}
		}

		if (atEOL) {
			int lev = levelPrev;
			if (visibleChars == 0 && foldCompact) {
				lev |= SC_FOLDLEVELWHITEFLAG;
			}
			if ((levelCurrent > levelPrev) && (visibleChars > 0)) {
				lev |= SC_FOLDLEVELHEADERFLAG;
			}
			if (lev != styler.LevelAt(lineCurrent)) {
				styler.SetLevel(lineCurrent, lev);
			}
			lineCurrent++;
			levelPrev = levelCurrent;
			visibleChars = 0;
		}
		if (!isspacechar(ch)) {
			visibleChars++;
		}
	}
	// Fill in the real level of the next line, keeping the current flags as they will be filled in later

	int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
	styler.SetLevel(lineCurrent, levelPrev | flagsNext);
}

static const char * const luaWordListDesc[] = {
	"Keywords",
	"Basic functions",
	"String, (table) & math functions",
	"(coroutines), I/O & system facilities",
	"user1",
	"user2",
	"user3",
	"user4",
	0
};

LexerModule lmLua(SCLEX_LUA, ColouriseLuaDoc, "lua", FoldLuaDoc, luaWordListDesc);
Commit	Line	Data
65ec6247 RD	1	// Scintilla source code edit control
	2	/** @file LexLua.cxx
	3	** Lexer for Lua language.
	4	**
	5	** Written by Paul Winwood.
	6	** Folder by Alexey Yutkin.
a834585d	7	** Modified by Marcos E. Wurzius & Philippe Lhoste
65ec6247	8	**/
d134f170 RD	9
	10	#include <stdlib.h>
	11	#include <string.h>
d134f170	12	#include <stdio.h>
1dcf666d RD	13	#include <stdarg.h>
	14	#include <assert.h>
	15	#include <ctype.h>
d134f170	16
1dcf666d RD	17	#include "ILexer.h"
	18	#include "Scintilla.h"
	19	#include "SciLexer.h"
d134f170	20
1dcf666d RD	21	#include "WordList.h"
1dcf666d RD	22	#include "LexAccessor.h"
d134f170	23	#include "Accessor.h"
1a2fb4cd	24	#include "StyleContext.h"
9e96e16f	25	#include "CharacterSet.h"
1dcf666d	26	#include "LexerModule.h"
d134f170	27
7e0c58e9 RD	28	#ifdef SCI_NAMESPACE
	29	using namespace Scintilla;
	30	#endif
	31
1e9bafca RD	32	// Test for [=[ ... ]=] delimiters, returns 0 if it's only a [ or ],
	33	// return 1 for [[ or ]], returns >=2 for [=[ or ]=] and so on.
	34	// The maximum number of '=' characters allowed is 254.
	35	static int LongDelimCheck(StyleContext &sc) {
	36	int sep = 1;
	37	while (sc.GetRelative(sep) == '=' && sep < 0xFF)
	38	sep++;
	39	if (sc.GetRelative(sep) == sc.ch)
	40	return sep;
	41	return 0;
	42	}
	43
a834585d RD	44	static void ColouriseLuaDoc(
	45	unsigned int startPos,
	46	int length,
	47	int initStyle,
	48	WordList *keywordlists[],
	49	Accessor &styler) {
65ec6247 RD	50
65ec6247 RD	51	WordList &keywords = *keywordlists[0];
1a2fb4cd RD	52	WordList &keywords2 = *keywordlists[1];
	53	WordList &keywords3 = *keywordlists[2];
	54	WordList &keywords4 = *keywordlists[3];
	55	WordList &keywords5 = *keywordlists[4];
	56	WordList &keywords6 = *keywordlists[5];
88a8b04e RD	57	WordList &keywords7 = *keywordlists[6];
88a8b04e RD	58	WordList &keywords8 = *keywordlists[7];
a834585d	59
9e96e16f RD	60	// Accepts accented characters
9e96e16f RD	61	CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
1dcf666d	62	CharacterSet setWord(CharacterSet::setAlphaNum, "_", 0x80, true);
9e96e16f	63	// Not exactly following number definition (several dots are seen as OK, etc.)
1dcf666d RD	64	// but probably enough in most cases. [pP] is for hex floats.
	65	CharacterSet setNumber(CharacterSet::setDigits, ".-+abcdefpABCDEFP");
	66	CharacterSet setExponent(CharacterSet::setNone, "eEpP");
9e96e16f RD	67	CharacterSet setLuaOperator(CharacterSet::setNone, "*/-+()={}~[];<>,.^%:#");
	68	CharacterSet setEscapeSkip(CharacterSet::setNone, "\"'\\");
	69
9e730a78	70	int currentLine = styler.GetLine(startPos);
1e9bafca RD	71	// Initialize long string [[ ... ]] or block comment --[[ ... ]] nesting level,
	72	// if we are inside such a string. Block comment was introduced in Lua 5.0,
	73	// blocks with separators [=[ ... ]=] in Lua 5.1.
1dcf666d	74	// Continuation of a string (\z whitespace escaping) is controlled by stringWs.
1e9bafca RD	75	int nestLevel = 0;
1e9bafca RD	76	int sepCount = 0;
1dcf666d RD	77	int stringWs = 0;
	78	if (initStyle == SCE_LUA_LITERALSTRING \|\| initStyle == SCE_LUA_COMMENT \|\|
	79	initStyle == SCE_LUA_STRING \|\| initStyle == SCE_LUA_CHARACTER) {
1e9bafca	80	int lineState = styler.GetLineState(currentLine - 1);
1dcf666d	81	nestLevel = lineState >> 9;
1e9bafca	82	sepCount = lineState & 0xFF;
1dcf666d	83	stringWs = lineState & 0x100;
a834585d	84	}
1a2fb4cd RD	85
1a2fb4cd RD	86	// Do not leak onto next line
1e9bafca	87	if (initStyle == SCE_LUA_STRINGEOL \|\| initStyle == SCE_LUA_COMMENTLINE \|\| initStyle == SCE_LUA_PREPROCESSOR) {
1a2fb4cd	88	initStyle = SCE_LUA_DEFAULT;
a834585d	89	}
1a2fb4cd RD	90
1a2fb4cd RD	91	StyleContext sc(startPos, length, initStyle, styler);
a834585d	92	if (startPos == 0 && sc.ch == '#') {
9e730a78	93	// shbang line: # is a comment only if first char of the script
a834585d RD	94	sc.SetState(SCE_LUA_COMMENTLINE);
a834585d RD	95	}
1a2fb4cd	96	for (; sc.More(); sc.Forward()) {
9e730a78 RD	97	if (sc.atLineEnd) {
	98	// Update the line state, so it can be seen by next line
	99	currentLine = styler.GetLine(sc.currentPos);
	100	switch (sc.state) {
	101	case SCE_LUA_LITERALSTRING:
1e9bafca	102	case SCE_LUA_COMMENT:
1dcf666d RD	103	case SCE_LUA_STRING:
	104	case SCE_LUA_CHARACTER:
	105	// Inside a literal string, block comment or string, we set the line state
	106	styler.SetLineState(currentLine, (nestLevel << 9) \| stringWs \| sepCount);
9e730a78 RD	107	break;
	108	default:
	109	// Reset the line state
	110	styler.SetLineState(currentLine, 0);
	111	break;
	112	}
	113	}
a834585d RD	114	if (sc.atLineStart && (sc.state == SCE_LUA_STRING)) {
	115	// Prevent SCE_LUA_STRINGEOL from leaking back to previous line
	116	sc.SetState(SCE_LUA_STRING);
	117	}
	118
	119	// Handle string line continuation
	120	if ((sc.state == SCE_LUA_STRING \|\| sc.state == SCE_LUA_CHARACTER) &&
9e96e16f	121	sc.ch == '\\') {
a834585d	122	if (sc.chNext == '\n' \|\| sc.chNext == '\r') {
1a2fb4cd	123	sc.Forward();
a834585d RD	124	if (sc.ch == '\r' && sc.chNext == '\n') {
	125	sc.Forward();
	126	}
1a2fb4cd	127	continue;
65ec6247 RD	128	}
	129	}
	130
1a2fb4cd RD	131	// Determine if the current state should terminate.
1a2fb4cd RD	132	if (sc.state == SCE_LUA_OPERATOR) {
1dcf666d RD	133	if (sc.ch == ':' && sc.chPrev == ':') { // :: <label> :: forward scan
	134	sc.Forward();
	135	int ln = 0, maxln = startPos + length - sc.currentPos;
	136	int c;
	137	while (ln < maxln) { // determine line extent
	138	c = sc.GetRelative(ln);
	139	if (c == '\r' \|\| c == '\n')
	140	break;
	141	ln++;
	142	}
	143	maxln = ln; ln = 0;
	144	while (ln < maxln) { // skip over spaces/tabs
	145	if (!IsASpaceOrTab(sc.GetRelative(ln)))
	146	break;
	147	ln++;
	148	}
	149	int ws1 = ln;
	150	if (setWordStart.Contains(sc.GetRelative(ln))) {
	151	int i = 0;
	152	char s[100];
	153	while (ln < maxln) { // get potential label
	154	c = sc.GetRelative(ln);
	155	if (!setWord.Contains(c))
	156	break;
	157	if (i < 90)
	158	s[i++] = c;
	159	ln++;
	160	}
	161	s[i] = '\0'; int lbl = ln;
	162	if (!keywords.InList(s)) {
	163	while (ln < maxln) { // skip over spaces/tabs
	164	if (!IsASpaceOrTab(sc.GetRelative(ln)))
	165	break;
	166	ln++;
	167	}
	168	int ws2 = ln - lbl;
	169	if (sc.GetRelative(ln) == ':' && sc.GetRelative(ln + 1) == ':') {
	170	// final :: found, complete valid label construct
	171	sc.ChangeState(SCE_LUA_LABEL);
	172	if (ws1) {
	173	sc.SetState(SCE_LUA_DEFAULT);
	174	sc.Forward(ws1);
	175	}
	176	sc.SetState(SCE_LUA_LABEL);
	177	sc.Forward(lbl - ws1);
	178	if (ws2) {
	179	sc.SetState(SCE_LUA_DEFAULT);
	180	sc.Forward(ws2);
	181	}
	182	sc.SetState(SCE_LUA_LABEL);
	183	sc.Forward(2);
	184	}
	185	}
	186	}
	187	}
1a2fb4cd RD	188	sc.SetState(SCE_LUA_DEFAULT);
1a2fb4cd RD	189	} else if (sc.state == SCE_LUA_NUMBER) {
1dcf666d	190	// We stop the number definition on non-numerical non-dot non-eEpP non-sign non-hexdigit char
9e96e16f	191	if (!setNumber.Contains(sc.ch)) {
8e54aaed	192	sc.SetState(SCE_LUA_DEFAULT);
7e0c58e9	193	} else if (sc.ch == '-' \|\| sc.ch == '+') {
1dcf666d	194	if (!setExponent.Contains(sc.chPrev))
9e96e16f RD	195	sc.SetState(SCE_LUA_DEFAULT);
9e96e16f RD	196	}
1a2fb4cd	197	} else if (sc.state == SCE_LUA_IDENTIFIER) {
1dcf666d	198	if (!(setWord.Contains(sc.ch) \|\| sc.ch == '.') \|\| sc.Match('.', '.')) {
1a2fb4cd RD	199	char s[100];
	200	sc.GetCurrent(s, sizeof(s));
	201	if (keywords.InList(s)) {
	202	sc.ChangeState(SCE_LUA_WORD);
1dcf666d RD	203	if (strcmp(s, "goto") == 0) { // goto <label> forward scan
	204	sc.SetState(SCE_LUA_DEFAULT);
	205	while (IsASpaceOrTab(sc.ch) && !sc.atLineEnd)
	206	sc.Forward();
	207	if (setWordStart.Contains(sc.ch)) {
	208	sc.SetState(SCE_LUA_LABEL);
	209	sc.Forward();
	210	while (setWord.Contains(sc.ch))
	211	sc.Forward();
	212	sc.GetCurrent(s, sizeof(s));
	213	if (keywords.InList(s))
	214	sc.ChangeState(SCE_LUA_WORD);
	215	}
	216	sc.SetState(SCE_LUA_DEFAULT);
	217	}
1a2fb4cd RD	218	} else if (keywords2.InList(s)) {
	219	sc.ChangeState(SCE_LUA_WORD2);
	220	} else if (keywords3.InList(s)) {
	221	sc.ChangeState(SCE_LUA_WORD3);
	222	} else if (keywords4.InList(s)) {
	223	sc.ChangeState(SCE_LUA_WORD4);
	224	} else if (keywords5.InList(s)) {
	225	sc.ChangeState(SCE_LUA_WORD5);
	226	} else if (keywords6.InList(s)) {
	227	sc.ChangeState(SCE_LUA_WORD6);
88a8b04e RD	228	} else if (keywords7.InList(s)) {
	229	sc.ChangeState(SCE_LUA_WORD7);
	230	} else if (keywords8.InList(s)) {
	231	sc.ChangeState(SCE_LUA_WORD8);
65ec6247	232	}
1a2fb4cd	233	sc.SetState(SCE_LUA_DEFAULT);
65ec6247	234	}
1e9bafca	235	} else if (sc.state == SCE_LUA_COMMENTLINE \|\| sc.state == SCE_LUA_PREPROCESSOR) {
1a2fb4cd	236	if (sc.atLineEnd) {
1e9bafca	237	sc.ForwardSetState(SCE_LUA_DEFAULT);
a834585d	238	}
1a2fb4cd	239	} else if (sc.state == SCE_LUA_STRING) {
1dcf666d RD	240	if (stringWs) {
	241	if (!IsASpace(sc.ch))
	242	stringWs = 0;
	243	}
1a2fb4cd	244	if (sc.ch == '\\') {
9e96e16f	245	if (setEscapeSkip.Contains(sc.chNext)) {
1a2fb4cd	246	sc.Forward();
1dcf666d RD	247	} else if (sc.chNext == 'z') {
	248	sc.Forward();
	249	stringWs = 0x100;
65ec6247	250	}
1a2fb4cd RD	251	} else if (sc.ch == '\"') {
1a2fb4cd RD	252	sc.ForwardSetState(SCE_LUA_DEFAULT);
1dcf666d	253	} else if (stringWs == 0 && sc.atLineEnd) {
1a2fb4cd RD	254	sc.ChangeState(SCE_LUA_STRINGEOL);
1a2fb4cd RD	255	sc.ForwardSetState(SCE_LUA_DEFAULT);
65ec6247	256	}
1a2fb4cd	257	} else if (sc.state == SCE_LUA_CHARACTER) {
1dcf666d RD	258	if (stringWs) {
	259	if (!IsASpace(sc.ch))
	260	stringWs = 0;
	261	}
1a2fb4cd	262	if (sc.ch == '\\') {
9e96e16f	263	if (setEscapeSkip.Contains(sc.chNext)) {
1a2fb4cd	264	sc.Forward();
1dcf666d RD	265	} else if (sc.chNext == 'z') {
	266	sc.Forward();
	267	stringWs = 0x100;
65ec6247	268	}
1a2fb4cd RD	269	} else if (sc.ch == '\'') {
1a2fb4cd RD	270	sc.ForwardSetState(SCE_LUA_DEFAULT);
1dcf666d	271	} else if (stringWs == 0 && sc.atLineEnd) {
1a2fb4cd RD	272	sc.ChangeState(SCE_LUA_STRINGEOL);
	273	sc.ForwardSetState(SCE_LUA_DEFAULT);
	274	}
1e9bafca RD	275	} else if (sc.state == SCE_LUA_LITERALSTRING \|\| sc.state == SCE_LUA_COMMENT) {
	276	if (sc.ch == '[') {
	277	int sep = LongDelimCheck(sc);
	278	if (sep == 1 && sepCount == 1) { // [[-only allowed to nest
	279	nestLevel++;
	280	sc.Forward();
9e730a78	281	}
1e9bafca RD	282	} else if (sc.ch == ']') {
	283	int sep = LongDelimCheck(sc);
	284	if (sep == 1 && sepCount == 1) { // un-nest with ]]-only
	285	nestLevel--;
	286	sc.Forward();
	287	if (nestLevel == 0) {
	288	sc.ForwardSetState(SCE_LUA_DEFAULT);
	289	}
	290	} else if (sep > 1 && sep == sepCount) { // ]=]-style delim
	291	sc.Forward(sep);
9e730a78	292	sc.ForwardSetState(SCE_LUA_DEFAULT);
a834585d	293	}
1a2fb4cd	294	}
a834585d	295	}
9e730a78	296
1a2fb4cd RD	297	// Determine if a new state should be entered.
	298	if (sc.state == SCE_LUA_DEFAULT) {
	299	if (IsADigit(sc.ch) \|\| (sc.ch == '.' && IsADigit(sc.chNext))) {
a834585d	300	sc.SetState(SCE_LUA_NUMBER);
b8193d80	301	if (sc.ch == '0' && toupper(sc.chNext) == 'X') {
9e96e16f	302	sc.Forward();
b8193d80	303	}
9e96e16f	304	} else if (setWordStart.Contains(sc.ch)) {
a834585d	305	sc.SetState(SCE_LUA_IDENTIFIER);
1e9bafca	306	} else if (sc.ch == '\"') {
1a2fb4cd	307	sc.SetState(SCE_LUA_STRING);
1dcf666d	308	stringWs = 0;
1e9bafca	309	} else if (sc.ch == '\'') {
1a2fb4cd	310	sc.SetState(SCE_LUA_CHARACTER);
1dcf666d	311	stringWs = 0;
1e9bafca RD	312	} else if (sc.ch == '[') {
	313	sepCount = LongDelimCheck(sc);
	314	if (sepCount == 0) {
	315	sc.SetState(SCE_LUA_OPERATOR);
	316	} else {
	317	nestLevel = 1;
	318	sc.SetState(SCE_LUA_LITERALSTRING);
	319	sc.Forward(sepCount);
	320	}
a834585d	321	} else if (sc.Match('-', '-')) {
1a2fb4cd	322	sc.SetState(SCE_LUA_COMMENTLINE);
1e9bafca RD	323	if (sc.Match("--[")) {
	324	sc.Forward(2);
	325	sepCount = LongDelimCheck(sc);
	326	if (sepCount > 0) {
	327	nestLevel = 1;
	328	sc.ChangeState(SCE_LUA_COMMENT);
	329	sc.Forward(sepCount);
	330	}
	331	} else {
	332	sc.Forward();
	333	}
9e730a78	334	} else if (sc.atLineStart && sc.Match('$')) {
a834585d	335	sc.SetState(SCE_LUA_PREPROCESSOR); // Obsolete since Lua 4.0, but still in old code
9e96e16f	336	} else if (setLuaOperator.Contains(sc.ch)) {
1a2fb4cd	337	sc.SetState(SCE_LUA_OPERATOR);
65ec6247 RD	338	}
65ec6247 RD	339	}
65ec6247	340	}
9e96e16f	341
1dcf666d	342	if (setWord.Contains(sc.chPrev) \|\| sc.chPrev == '.') {
9e96e16f RD	343	char s[100];
	344	sc.GetCurrent(s, sizeof(s));
	345	if (keywords.InList(s)) {
	346	sc.ChangeState(SCE_LUA_WORD);
	347	} else if (keywords2.InList(s)) {
	348	sc.ChangeState(SCE_LUA_WORD2);
	349	} else if (keywords3.InList(s)) {
	350	sc.ChangeState(SCE_LUA_WORD3);
	351	} else if (keywords4.InList(s)) {
	352	sc.ChangeState(SCE_LUA_WORD4);
	353	} else if (keywords5.InList(s)) {
	354	sc.ChangeState(SCE_LUA_WORD5);
	355	} else if (keywords6.InList(s)) {
	356	sc.ChangeState(SCE_LUA_WORD6);
	357	} else if (keywords7.InList(s)) {
	358	sc.ChangeState(SCE_LUA_WORD7);
	359	} else if (keywords8.InList(s)) {
	360	sc.ChangeState(SCE_LUA_WORD8);
	361	}
	362	}
	363
1a2fb4cd	364	sc.Complete();
65ec6247	365	}
d134f170	366
65ec6247 RD	367	static void FoldLuaDoc(unsigned int startPos, int length, int /* initStyle /, WordList [],
	368	Accessor &styler) {
	369	unsigned int lengthDoc = startPos + length;
	370	int visibleChars = 0;
	371	int lineCurrent = styler.GetLine(startPos);
	372	int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
	373	int levelCurrent = levelPrev;
	374	char chNext = styler[startPos];
1a2fb4cd	375	bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
65ec6247 RD	376	int styleNext = styler.StyleAt(startPos);
65ec6247 RD	377	char s[10];
a834585d	378
65ec6247 RD	379	for (unsigned int i = startPos; i < lengthDoc; i++) {
	380	char ch = chNext;
	381	chNext = styler.SafeGetCharAt(i + 1);
	382	int style = styleNext;
	383	styleNext = styler.StyleAt(i + 1);
	384	bool atEOL = (ch == '\r' && chNext != '\n') \|\| (ch == '\n');
1a2fb4cd	385	if (style == SCE_LUA_WORD) {
1e9bafca	386	if (ch == 'i' \|\| ch == 'd' \|\| ch == 'f' \|\| ch == 'e' \|\| ch == 'r' \|\| ch == 'u') {
65ec6247	387	for (unsigned int j = 0; j < 8; j++) {
a834585d	388	if (!iswordchar(styler[i + j])) {
1a2fb4cd	389	break;
a834585d	390	}
65ec6247 RD	391	s[j] = styler[i + j];
	392	s[j + 1] = '\0';
	393	}
a834585d	394
1e9bafca	395	if ((strcmp(s, "if") == 0) \|\| (strcmp(s, "do") == 0) \|\| (strcmp(s, "function") == 0) \|\| (strcmp(s, "repeat") == 0)) {
65ec6247	396	levelCurrent++;
a834585d	397	}
1e9bafca	398	if ((strcmp(s, "end") == 0) \|\| (strcmp(s, "elseif") == 0) \|\| (strcmp(s, "until") == 0)) {
1a2fb4cd	399	levelCurrent--;
a834585d	400	}
65ec6247	401	}
a834585d RD	402	} else if (style == SCE_LUA_OPERATOR) {
a834585d RD	403	if (ch == '{' \|\| ch == '(') {
1a2fb4cd	404	levelCurrent++;
a834585d	405	} else if (ch == '}' \|\| ch == ')') {
1a2fb4cd	406	levelCurrent--;
a834585d	407	}
1e9bafca RD	408	} else if (style == SCE_LUA_LITERALSTRING \|\| style == SCE_LUA_COMMENT) {
	409	if (ch == '[') {
	410	levelCurrent++;
	411	} else if (ch == ']') {
	412	levelCurrent--;
	413	}
1a2fb4cd	414	}
a834585d	415
65ec6247 RD	416	if (atEOL) {
65ec6247 RD	417	int lev = levelPrev;
a834585d	418	if (visibleChars == 0 && foldCompact) {
65ec6247	419	lev \|= SC_FOLDLEVELWHITEFLAG;
a834585d RD	420	}
a834585d RD	421	if ((levelCurrent > levelPrev) && (visibleChars > 0)) {
65ec6247	422	lev \|= SC_FOLDLEVELHEADERFLAG;
a834585d	423	}
65ec6247 RD	424	if (lev != styler.LevelAt(lineCurrent)) {
	425	styler.SetLevel(lineCurrent, lev);
	426	}
	427	lineCurrent++;
	428	levelPrev = levelCurrent;
	429	visibleChars = 0;
	430	}
a834585d	431	if (!isspacechar(ch)) {
65ec6247	432	visibleChars++;
a834585d	433	}
65ec6247 RD	434	}
65ec6247 RD	435	// Fill in the real level of the next line, keeping the current flags as they will be filled in later
1a2fb4cd	436
65ec6247 RD	437	int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
65ec6247 RD	438	styler.SetLevel(lineCurrent, levelPrev \| flagsNext);
d134f170 RD	439	}
d134f170 RD	440
9e730a78 RD	441	static const char * const luaWordListDesc[] = {
	442	"Keywords",
	443	"Basic functions",
88a8b04e RD	444	"String, (table) & math functions",
88a8b04e RD	445	"(coroutines), I/O & system facilities",
1e9bafca RD	446	"user1",
	447	"user2",
	448	"user3",
	449	"user4",
9e730a78 RD	450	0
	451	};
	452
	453	LexerModule lmLua(SCLEX_LUA, ColouriseLuaDoc, "lua", FoldLuaDoc, luaWordListDesc);