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// 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 (!isspacechar(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);
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