[wxWidgets.git] / src / stc / scintilla / src / LexVB.cxx

// SciTE - Scintilla based Text Editor
// LexVB.cxx - lexer for Visual Basic and VBScript
// Copyright 1998-2000 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

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

#include "Platform.h"

#include "PropSet.h"
#include "Accessor.h"
#include "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"

static int classifyWordVB(unsigned int start, unsigned int end, WordList &keywords, Accessor &styler) {

	char s[100];
	bool wordIsNumber = isdigit(styler[start]) || (styler[start] == '.') ||
		(styler[start] == '&' && tolower(styler[start+1]) == 'h');
	unsigned int i;
	for (i = 0; i < end - start + 1 && i < 30; i++) {
		s[i] = static_cast<char>(tolower(styler[start + i]));
	}
	s[i] = '\0';
	char chAttr = SCE_C_DEFAULT;
	if (wordIsNumber)
		chAttr = SCE_C_NUMBER;
	else {
		if (strcmp(s, "rem") == 0)
			chAttr = SCE_C_COMMENTLINE;
		else if (keywords.InList(s))
			chAttr = SCE_C_WORD;
	}
	styler.ColourTo(end, chAttr);
	if (chAttr == SCE_C_COMMENTLINE)
		return SCE_C_COMMENTLINE;
	else
		return SCE_C_DEFAULT;
}

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

	WordList &keywords = *keywordlists[0];
	
	styler.StartAt(startPos);

	int visibleChars = 0;
	int state = initStyle;
	char chNext = styler[startPos];
	styler.StartSegment(startPos);
	int lengthDoc = startPos + length;
	for (int i = startPos; i < lengthDoc; i++) {
		char ch = chNext;
		chNext = styler.SafeGetCharAt(i + 1);

		if (styler.IsLeadByte(ch)) {
			chNext = styler.SafeGetCharAt(i + 2);
			i += 1;
			continue;
		}

		if (ch == '\r' || ch == '\n') {
			// End of line
			if (state == SCE_C_COMMENTLINE || state == SCE_C_PREPROCESSOR) {
				styler.ColourTo(i - 1, state);
				state = SCE_C_DEFAULT;
			}
			visibleChars = 0;
		}
		if (!isspace(ch))
			visibleChars++;

		if (state == SCE_C_DEFAULT) {
			if (iswordstart(ch)) {
				styler.ColourTo(i - 1, state);
				state = SCE_C_WORD;
			} else if (ch == '\'') {
				styler.ColourTo(i - 1, state);
				state = SCE_C_COMMENTLINE;
			} else if (ch == '\"') {
				styler.ColourTo(i - 1, state);
				state = SCE_C_STRING;
			} else if (ch == '#' && visibleChars == 1) {
				// Preprocessor commands are alone on their line
				styler.ColourTo(i - 1, state);
				state = SCE_C_PREPROCESSOR;
			} else if (ch == '&' && tolower(chNext) == 'h') {
				styler.ColourTo(i - 1, state);
				state = SCE_C_WORD;
			} else if (isoperator(ch)) {
				styler.ColourTo(i - 1, state);
				styler.ColourTo(i, SCE_C_OPERATOR);
			}
		} else if (state == SCE_C_WORD) {
			if (!iswordchar(ch)) {
				state = classifyWordVB(styler.GetStartSegment(), i - 1, keywords, styler);
				if (state == SCE_C_DEFAULT) {
					if (ch == '\'') {
						state = SCE_C_COMMENTLINE;
					} else if (ch == '\"') {
						state = SCE_C_STRING;
					} else if (isoperator(ch)) {
						styler.ColourTo(i - 1, state);
						styler.ColourTo(i, SCE_C_OPERATOR);
					}
				}
			}
		} else {
			if (state == SCE_C_STRING) {
				// VB doubles quotes to preserve them
				if (ch == '\"') {
					styler.ColourTo(i, state);
					state = SCE_C_DEFAULT;
					i++;
					ch = chNext;
					chNext = styler.SafeGetCharAt(i + 1);
				}
			}
			if (state == SCE_C_DEFAULT) {    // One of the above succeeded
				if (ch == '\'') {
					state = SCE_C_COMMENTLINE;
				} else if (ch == '\"') {
					state = SCE_C_STRING;
				} else if (iswordstart(ch)) {
					state = SCE_C_WORD;
				}
			}
		}
	}
	styler.ColourTo(lengthDoc, state);
}

LexerModule lmVB(SCLEX_VB, ColouriseVBDoc);
Commit	Line	Data
f6bcfd97 BP	1	// SciTE - Scintilla based Text Editor
	2	// LexVB.cxx - lexer for Visual Basic and VBScript
	3	// Copyright 1998-2000 by Neil Hodgson <neilh@scintilla.org>
	4	// The License.txt file describes the conditions under which this software may be distributed.
	5
	6	#include <stdlib.h>
	7	#include <string.h>
	8	#include <ctype.h>
	9	#include <stdio.h>
	10	#include <stdarg.h>
	11
	12	#include "Platform.h"
	13
	14	#include "PropSet.h"
	15	#include "Accessor.h"
	16	#include "KeyWords.h"
	17	#include "Scintilla.h"
	18	#include "SciLexer.h"
	19
	20	static int classifyWordVB(unsigned int start, unsigned int end, WordList &keywords, Accessor &styler) {
	21
	22	char s[100];
d134f170 RD	23	bool wordIsNumber = isdigit(styler[start]) \|\| (styler[start] == '.') \|\|
	24	(styler[start] == '&' && tolower(styler[start+1]) == 'h');
	25	unsigned int i;
	26	for (i = 0; i < end - start + 1 && i < 30; i++) {
f6bcfd97	27	s[i] = static_cast<char>(tolower(styler[start + i]));
f6bcfd97	28	}
d134f170	29	s[i] = '\0';
f6bcfd97 BP	30	char chAttr = SCE_C_DEFAULT;
	31	if (wordIsNumber)
	32	chAttr = SCE_C_NUMBER;
	33	else {
d134f170 RD	34	if (strcmp(s, "rem") == 0)
	35	chAttr = SCE_C_COMMENTLINE;
	36	else if (keywords.InList(s))
f6bcfd97	37	chAttr = SCE_C_WORD;
f6bcfd97 BP	38	}
	39	styler.ColourTo(end, chAttr);
	40	if (chAttr == SCE_C_COMMENTLINE)
	41	return SCE_C_COMMENTLINE;
	42	else
	43	return SCE_C_DEFAULT;
	44	}
	45
	46	static void ColouriseVBDoc(unsigned int startPos, int length, int initStyle,
	47	WordList *keywordlists[], Accessor &styler) {
	48
	49	WordList &keywords = *keywordlists[0];
	50
	51	styler.StartAt(startPos);
	52
d134f170	53	int visibleChars = 0;
f6bcfd97 BP	54	int state = initStyle;
	55	char chNext = styler[startPos];
	56	styler.StartSegment(startPos);
	57	int lengthDoc = startPos + length;
	58	for (int i = startPos; i < lengthDoc; i++) {
	59	char ch = chNext;
	60	chNext = styler.SafeGetCharAt(i + 1);
	61
	62	if (styler.IsLeadByte(ch)) {
	63	chNext = styler.SafeGetCharAt(i + 2);
	64	i += 1;
	65	continue;
	66	}
	67
d134f170 RD	68	if (ch == '\r' \|\| ch == '\n') {
	69	// End of line
	70	if (state == SCE_C_COMMENTLINE \|\| state == SCE_C_PREPROCESSOR) {
	71	styler.ColourTo(i - 1, state);
	72	state = SCE_C_DEFAULT;
	73	}
	74	visibleChars = 0;
	75	}
	76	if (!isspace(ch))
	77	visibleChars++;
	78
f6bcfd97 BP	79	if (state == SCE_C_DEFAULT) {
	80	if (iswordstart(ch)) {
	81	styler.ColourTo(i - 1, state);
	82	state = SCE_C_WORD;
	83	} else if (ch == '\'') {
	84	styler.ColourTo(i - 1, state);
	85	state = SCE_C_COMMENTLINE;
	86	} else if (ch == '\"') {
	87	styler.ColourTo(i - 1, state);
	88	state = SCE_C_STRING;
d134f170 RD	89	} else if (ch == '#' && visibleChars == 1) {
	90	// Preprocessor commands are alone on their line
	91	styler.ColourTo(i - 1, state);
	92	state = SCE_C_PREPROCESSOR;
	93	} else if (ch == '&' && tolower(chNext) == 'h') {
	94	styler.ColourTo(i - 1, state);
	95	state = SCE_C_WORD;
	96	} else if (isoperator(ch)) {
	97	styler.ColourTo(i - 1, state);
	98	styler.ColourTo(i, SCE_C_OPERATOR);
f6bcfd97 BP	99	}
	100	} else if (state == SCE_C_WORD) {
	101	if (!iswordchar(ch)) {
	102	state = classifyWordVB(styler.GetStartSegment(), i - 1, keywords, styler);
	103	if (state == SCE_C_DEFAULT) {
	104	if (ch == '\'') {
	105	state = SCE_C_COMMENTLINE;
	106	} else if (ch == '\"') {
	107	state = SCE_C_STRING;
d134f170 RD	108	} else if (isoperator(ch)) {
	109	styler.ColourTo(i - 1, state);
	110	styler.ColourTo(i, SCE_C_OPERATOR);
f6bcfd97 BP	111	}
	112	}
	113	}
	114	} else {
d134f170	115	if (state == SCE_C_STRING) {
f6bcfd97 BP	116	// VB doubles quotes to preserve them
	117	if (ch == '\"') {
	118	styler.ColourTo(i, state);
	119	state = SCE_C_DEFAULT;
	120	i++;
	121	ch = chNext;
	122	chNext = styler.SafeGetCharAt(i + 1);
	123	}
	124	}
	125	if (state == SCE_C_DEFAULT) { // One of the above succeeded
	126	if (ch == '\'') {
	127	state = SCE_C_COMMENTLINE;
	128	} else if (ch == '\"') {
	129	state = SCE_C_STRING;
	130	} else if (iswordstart(ch)) {
	131	state = SCE_C_WORD;
	132	}
	133	}
	134	}
	135	}
	136	styler.ColourTo(lengthDoc, state);
	137	}
	138
	139	LexerModule lmVB(SCLEX_VB, ColouriseVBDoc);