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// Scintilla source code edit control
/** @file LexVB.cxx
** Lexer for Visual Basic and VBScript.
**/
// Copyright 1998-2001 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 "StyleContext.h"
#include "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"
static bool IsVBComment(Accessor &styler, int pos, int len) {
return len>0 && styler[pos]=='\'';
}
static inline bool IsTypeCharacter(const int ch) {
return ch == '%' || ch == '&' || ch == '@' || ch == '!' || ch == '#' || ch == '$';
}
static inline bool IsAWordChar(const int ch) {
return (ch < 0x80) && (isalnum(ch) || ch == '.' || ch == '_');
}
static inline bool IsAWordStart(const int ch) {
return (ch < 0x80) && (isalnum(ch) || ch == '_');
}
static inline bool IsADateCharacter(const int ch) {
return (ch < 0x80) &&
(isalnum(ch) || ch == '|' || ch == '-' || ch == '/' || ch == ':' || ch == ' ' || ch == '\t');
}
static void ColouriseVBDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler, bool vbScriptSyntax) {
WordList &keywords = *keywordlists[0];
styler.StartAt(startPos);
int visibleChars = 0;
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward()) {
if (sc.state == SCE_B_OPERATOR) {
sc.SetState(SCE_B_DEFAULT);
} else if (sc.state == SCE_B_KEYWORD) {
if (!IsAWordChar(sc.ch)) {
if (vbScriptSyntax || !IsTypeCharacter(sc.ch)) {
if (sc.ch == ']')
sc.Forward();
char s[100];
sc.GetCurrentLowered(s, sizeof(s));
if (keywords.InList(s)) {
if (strcmp(s, "rem") == 0) {
sc.ChangeState(SCE_B_COMMENT);
if (sc.atLineEnd) {
sc.SetState(SCE_B_DEFAULT);
}
} else {
sc.SetState(SCE_B_DEFAULT);
}
} else {
sc.ChangeState(SCE_B_IDENTIFIER);
sc.SetState(SCE_B_DEFAULT);
}
}
}
} else if (sc.state == SCE_B_NUMBER) {
if (!IsAWordChar(sc.ch)) {
sc.SetState(SCE_B_DEFAULT);
}
} else if (sc.state == SCE_B_STRING) {
// VB doubles quotes to preserve them, so just end this string
// state now as a following quote will start again
if (sc.ch == '\"') {
if (tolower(sc.chNext) == 'c') {
sc.Forward();
}
sc.ForwardSetState(SCE_B_DEFAULT);
}
} else if (sc.state == SCE_B_COMMENT) {
if (sc.atLineEnd) {
sc.SetState(SCE_B_DEFAULT);
}
} else if (sc.state == SCE_B_PREPROCESSOR) {
if (sc.atLineEnd) {
sc.SetState(SCE_B_DEFAULT);
}
} else if (sc.state == SCE_B_DATE) {
if (sc.ch == '#' || !IsADateCharacter(sc.chNext)) {
sc.ForwardSetState(SCE_B_DEFAULT);
}
}
if (sc.state == SCE_B_DEFAULT) {
if (sc.ch == '\'') {
sc.SetState(SCE_B_COMMENT);
} else if (sc.ch == '\"') {
sc.SetState(SCE_B_STRING);
} else if (sc.ch == '#' && visibleChars == 0) {
// Preprocessor commands are alone on their line
sc.SetState(SCE_B_PREPROCESSOR);
} else if (sc.ch == '#') {
int n = 1;
int chSeek = ' ';
while (chSeek == ' ' || chSeek == '\t') {
chSeek = sc.GetRelative(n);
n++;
}
if (IsADigit(chSeek)) {
sc.SetState(SCE_B_DATE);
} else {
sc.SetState(SCE_B_OPERATOR);
}
} else if (sc.ch == '&' && tolower(sc.chNext) == 'h') {
sc.SetState(SCE_B_NUMBER);
} else if (sc.ch == '&' && tolower(sc.chNext) == 'o') {
sc.SetState(SCE_B_NUMBER);
} else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_B_NUMBER);
} else if (IsAWordStart(sc.ch) || (sc.ch == '[')) {
sc.SetState(SCE_B_KEYWORD);
} else if (isoperator(static_cast<char>(sc.ch)) || (sc.ch == '\\')) {
sc.SetState(SCE_B_OPERATOR);
}
}
if (sc.atLineEnd) {
visibleChars = 0;
}
if (!IsASpace(sc.ch)) {
visibleChars++;
}
}
sc.Complete();
}
static void FoldVBDoc(unsigned int startPos, int length, int,
WordList *[], Accessor &styler) {
int endPos = startPos + length;
// Backtrack to previous line in case need to fix its fold status
int lineCurrent = styler.GetLine(startPos);
if (startPos > 0) {
if (lineCurrent > 0) {
lineCurrent--;
startPos = styler.LineStart(lineCurrent);
}
}
int spaceFlags = 0;
int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, IsVBComment);
char chNext = styler[startPos];
for (int i = startPos; i < endPos; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
if ((ch == '\r' && chNext != '\n') || (ch == '\n') || (i == endPos)) {
int lev = indentCurrent;
int indentNext = styler.IndentAmount(lineCurrent + 1, &spaceFlags, IsVBComment);
if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
// Only non whitespace lines can be headers
if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK)) {
lev |= SC_FOLDLEVELHEADERFLAG;
} else if (indentNext & SC_FOLDLEVELWHITEFLAG) {
// Line after is blank so check the next - maybe should continue further?
int spaceFlags2 = 0;
int indentNext2 = styler.IndentAmount(lineCurrent + 2, &spaceFlags2, IsVBComment);
if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext2 & SC_FOLDLEVELNUMBERMASK)) {
lev |= SC_FOLDLEVELHEADERFLAG;
}
}
}
indentCurrent = indentNext;
styler.SetLevel(lineCurrent, lev);
lineCurrent++;
}
}
}
static void ColouriseVBNetDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
ColouriseVBDoc(startPos, length, initStyle, keywordlists, styler, false);
}
static void ColouriseVBScriptDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
ColouriseVBDoc(startPos, length, initStyle, keywordlists, styler, true);
}
static const char * const vbWordListDesc[] = {
"Keywords",
0
};
LexerModule lmVB(SCLEX_VB, ColouriseVBNetDoc, "vb", FoldVBDoc, vbWordListDesc);
LexerModule lmVBScript(SCLEX_VBSCRIPT, ColouriseVBScriptDoc, "vbscript", FoldVBDoc, vbWordListDesc);
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