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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 "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 bool IsVBComment(Accessor &styler, int pos, int len) {
return len>0 && styler[pos]=='\'';
}
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);
}
static void FoldVBDoc(unsigned int startPos, int length, int initStyle,
WordList *[], Accessor &styler) {
int lengthDoc = 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);
if (startPos == 0)
initStyle = SCE_P_DEFAULT;
else
initStyle = styler.StyleAt(startPos-1);
}
}
int state = initStyle & 31;
int spaceFlags = 0;
int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, IsVBComment);
if ((state == SCE_P_TRIPLE) || (state == SCE_P_TRIPLEDOUBLE))
indentCurrent |= SC_FOLDLEVELWHITEFLAG;
char chNext = styler[startPos];
for (int i = startPos; i < lengthDoc; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
int style = styler.StyleAt(i) & 31;
if ((ch == '\r' && chNext != '\n') || (ch == '\n') || (i == lengthDoc)) {
int lev = indentCurrent;
int indentNext = styler.IndentAmount(lineCurrent + 1, &spaceFlags, IsVBComment);
if ((style == SCE_P_TRIPLE) || (style== SCE_P_TRIPLEDOUBLE))
indentNext |= SC_FOLDLEVELWHITEFLAG;
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++;
}
}
}
LexerModule lmVB(SCLEX_VB, ColouriseVBDoc, "vb", FoldVBDoc);
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