You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
411 lines
12 KiB
411 lines
12 KiB
// Scintilla source code edit control
|
|
/** @file LexVB.cxx
|
|
** Lexer for Visual Basic and VBScript.
|
|
**/
|
|
// Copyright 1998-2005 by Neil Hodgson <neilh@scintilla.org>
|
|
// The License.txt file describes the conditions under which this software may be distributed.
|
|
|
|
#include <cstdlib>
|
|
#include <cassert>
|
|
#include <cstring>
|
|
|
|
#include <string>
|
|
#include <string_view>
|
|
#include <map>
|
|
|
|
#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"
|
|
#include "OptionSet.h"
|
|
#include "DefaultLexer.h"
|
|
|
|
using namespace Scintilla;
|
|
using namespace Lexilla;
|
|
|
|
namespace {
|
|
|
|
// Internal state, highlighted as number
|
|
constexpr int SCE_B_FILENUMBER = SCE_B_DEFAULT + 100;
|
|
|
|
bool IsVBComment(Accessor &styler, Sci_Position pos, Sci_Position len) {
|
|
return len > 0 && styler[pos] == '\'';
|
|
}
|
|
|
|
constexpr bool IsTypeCharacter(int ch) noexcept {
|
|
return ch == '%' || ch == '&' || ch == '@' || ch == '!' || ch == '#' || ch == '$';
|
|
}
|
|
|
|
// Extended to accept accented characters
|
|
constexpr bool IsAWordChar(int ch) noexcept {
|
|
return !IsASCII(ch) ||
|
|
(IsAlphaNumeric(ch) || ch == '.' || ch == '_');
|
|
}
|
|
|
|
constexpr bool IsAWordStart(int ch) noexcept {
|
|
return !IsASCII(ch) ||
|
|
(IsUpperOrLowerCase(ch) || ch == '_');
|
|
}
|
|
|
|
constexpr bool IsANumberChar(int ch) noexcept {
|
|
// Not exactly following number definition (several dots are seen as OK, etc.)
|
|
// but probably enough in most cases.
|
|
return IsAHeXDigit(ch) || AnyOf(ch, '.', '-', '+', '_');
|
|
}
|
|
|
|
// Options used for LexerVB
|
|
struct OptionsVB {
|
|
bool fold = false;
|
|
bool allowMultilineStr = false;
|
|
};
|
|
|
|
const char * const vbWordListDesc[] = {
|
|
"Keywords",
|
|
"user1",
|
|
"user2",
|
|
"user3",
|
|
nullptr
|
|
};
|
|
|
|
struct OptionSetVB : public OptionSet<OptionsVB> {
|
|
OptionSetVB() {
|
|
DefineProperty("fold", &OptionsVB::fold);
|
|
|
|
DefineProperty("lexer.vb.strings.multiline", &OptionsVB::allowMultilineStr,
|
|
"Set to 1 to allow strings to continue over line ends.");
|
|
|
|
DefineWordListSets(vbWordListDesc);
|
|
}
|
|
};
|
|
|
|
LexicalClass lexicalClasses[] = {
|
|
// Lexer vb SCLEX_VB SCE_B_:
|
|
0, "SCE_B_DEFAULT", "default", "White space",
|
|
1, "SCE_B_COMMENT", "comment", "Comment: '",
|
|
2, "SCE_B_NUMBER", "literal numeric", "Number",
|
|
3, "SCE_B_KEYWORD", "keyword", "Keyword",
|
|
4, "SCE_B_STRING", "literal string", "Double quoted string",
|
|
5, "SCE_B_PREPROCESSOR", "preprocessor", "Preprocessor",
|
|
6, "SCE_B_OPERATOR", "operator", "Operators",
|
|
7, "SCE_B_IDENTIFIER", "identifier", "Identifiers",
|
|
8, "SCE_B_DATE", "literal date", "Date",
|
|
9, "SCE_B_STRINGEOL", "error literal string", "End of line where string is not closed",
|
|
10, "SCE_B_KEYWORD2", "identifier", "Keywords2",
|
|
11, "SCE_B_KEYWORD3", "identifier", "Keywords3",
|
|
12, "SCE_B_KEYWORD4", "identifier", "Keywords4",
|
|
};
|
|
|
|
class LexerVB : public DefaultLexer {
|
|
bool vbScriptSyntax;
|
|
WordList keywords;
|
|
WordList keywords2;
|
|
WordList keywords3;
|
|
WordList keywords4;
|
|
OptionsVB options;
|
|
OptionSetVB osVB;
|
|
public:
|
|
LexerVB(const char *languageName_, int language_, bool vbScriptSyntax_) :
|
|
DefaultLexer(languageName_, language_, lexicalClasses, std::size(lexicalClasses)),
|
|
vbScriptSyntax(vbScriptSyntax_) {
|
|
}
|
|
// Deleted so LexerVB objects can not be copied.
|
|
LexerVB(const LexerVB &) = delete;
|
|
LexerVB(LexerVB &&) = delete;
|
|
void operator=(const LexerVB &) = delete;
|
|
void operator=(LexerVB &&) = delete;
|
|
~LexerVB() override = default;
|
|
void SCI_METHOD Release() override {
|
|
delete this;
|
|
}
|
|
int SCI_METHOD Version() const override {
|
|
return lvRelease5;
|
|
}
|
|
const char *SCI_METHOD PropertyNames() override {
|
|
return osVB.PropertyNames();
|
|
}
|
|
int SCI_METHOD PropertyType(const char *name) override {
|
|
return osVB.PropertyType(name);
|
|
}
|
|
const char *SCI_METHOD DescribeProperty(const char *name) override {
|
|
return osVB.DescribeProperty(name);
|
|
}
|
|
Sci_Position SCI_METHOD PropertySet(const char *key, const char *val) override;
|
|
const char *SCI_METHOD PropertyGet(const char *key) override {
|
|
return osVB.PropertyGet(key);
|
|
}
|
|
const char *SCI_METHOD DescribeWordListSets() override {
|
|
return osVB.DescribeWordListSets();
|
|
}
|
|
Sci_Position SCI_METHOD WordListSet(int n, const char *wl) override;
|
|
|
|
void CheckIdentifier(Lexilla::StyleContext &sc);
|
|
|
|
void SCI_METHOD Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
|
|
void SCI_METHOD Fold(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
|
|
|
|
void *SCI_METHOD PrivateCall(int, void *) override {
|
|
return nullptr;
|
|
}
|
|
static ILexer5 *LexerFactoryVB() {
|
|
return new LexerVB("vb", SCLEX_VB, false);
|
|
}
|
|
static ILexer5 *LexerFactoryVBScript() {
|
|
return new LexerVB("vbscript", SCLEX_VBSCRIPT, true);
|
|
}
|
|
};
|
|
|
|
Sci_Position SCI_METHOD LexerVB::PropertySet(const char *key, const char *val) {
|
|
if (osVB.PropertySet(&options, key, val)) {
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
Sci_Position SCI_METHOD LexerVB::WordListSet(int n, const char *wl) {
|
|
WordList *wordListN = nullptr;
|
|
switch (n) {
|
|
case 0:
|
|
wordListN = &keywords;
|
|
break;
|
|
case 1:
|
|
wordListN = &keywords2;
|
|
break;
|
|
case 2:
|
|
wordListN = &keywords3;
|
|
break;
|
|
case 3:
|
|
wordListN = &keywords4;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
Sci_Position firstModification = -1;
|
|
if (wordListN && wordListN->Set(wl, true)) {
|
|
firstModification = 0;
|
|
}
|
|
return firstModification;
|
|
}
|
|
|
|
void LexerVB::CheckIdentifier(StyleContext &sc) {
|
|
// In Basic (except VBScript), a variable name or a function name
|
|
// can end with a special character indicating the type of the value
|
|
// held or returned.
|
|
bool skipType = false;
|
|
if (!vbScriptSyntax && IsTypeCharacter(sc.ch)) {
|
|
sc.Forward(); // Skip it
|
|
skipType = true;
|
|
}
|
|
if (sc.ch == ']') {
|
|
sc.Forward();
|
|
}
|
|
char s[100];
|
|
sc.GetCurrentLowered(s, sizeof(s));
|
|
if (skipType) {
|
|
s[strlen(s) - 1] = '\0';
|
|
}
|
|
if (strcmp(s, "rem") == 0) {
|
|
sc.ChangeState(SCE_B_COMMENT);
|
|
} else {
|
|
if (keywords.InList(s)) {
|
|
sc.ChangeState(SCE_B_KEYWORD);
|
|
} else if (keywords2.InList(s)) {
|
|
sc.ChangeState(SCE_B_KEYWORD2);
|
|
} else if (keywords3.InList(s)) {
|
|
sc.ChangeState(SCE_B_KEYWORD3);
|
|
} else if (keywords4.InList(s)) {
|
|
sc.ChangeState(SCE_B_KEYWORD4);
|
|
} // Else, it is really an identifier...
|
|
sc.SetState(SCE_B_DEFAULT);
|
|
}
|
|
}
|
|
|
|
void LexerVB::Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) {
|
|
Accessor styler(pAccess, nullptr);
|
|
|
|
styler.StartAt(startPos);
|
|
|
|
int visibleChars = 0;
|
|
int fileNbDigits = 0;
|
|
|
|
// Do not leak onto next line
|
|
if (initStyle == SCE_B_STRINGEOL || initStyle == SCE_B_COMMENT || initStyle == SCE_B_PREPROCESSOR) {
|
|
initStyle = SCE_B_DEFAULT;
|
|
}
|
|
|
|
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_IDENTIFIER) {
|
|
if (!IsAWordChar(sc.ch)) {
|
|
CheckIdentifier(sc);
|
|
}
|
|
} else if (sc.state == SCE_B_NUMBER) {
|
|
// We stop the number definition on non-numerical non-dot non-eE non-sign char
|
|
// Also accepts A-F for hex. numbers
|
|
if (!IsANumberChar(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 (sc.chNext == '\"') {
|
|
sc.Forward();
|
|
} else {
|
|
if (MakeLowerCase(sc.chNext) == 'c') {
|
|
sc.Forward();
|
|
}
|
|
sc.ForwardSetState(SCE_B_DEFAULT);
|
|
}
|
|
} else if (sc.atLineEnd && !options.allowMultilineStr) {
|
|
visibleChars = 0;
|
|
sc.ChangeState(SCE_B_STRINGEOL);
|
|
sc.ForwardSetState(SCE_B_DEFAULT);
|
|
}
|
|
} else if (sc.state == SCE_B_COMMENT) {
|
|
if (sc.atLineEnd) {
|
|
visibleChars = 0;
|
|
sc.ForwardSetState(SCE_B_DEFAULT);
|
|
}
|
|
} else if (sc.state == SCE_B_PREPROCESSOR) {
|
|
if (sc.atLineEnd) {
|
|
visibleChars = 0;
|
|
sc.ForwardSetState(SCE_B_DEFAULT);
|
|
}
|
|
} else if (sc.state == SCE_B_FILENUMBER) {
|
|
if (IsADigit(sc.ch)) {
|
|
fileNbDigits++;
|
|
if (fileNbDigits > 3) {
|
|
sc.ChangeState(SCE_B_DATE);
|
|
}
|
|
} else if (sc.ch == '\r' || sc.ch == '\n' || sc.ch == ',') {
|
|
// Regular uses: Close #1; Put #1, ...; Get #1, ... etc.
|
|
// Too bad if date is format #27, Oct, 2003# or something like that...
|
|
// Use regular number state
|
|
sc.ChangeState(SCE_B_NUMBER);
|
|
sc.SetState(SCE_B_DEFAULT);
|
|
} else if (sc.ch == '#') {
|
|
sc.ChangeState(SCE_B_DATE);
|
|
sc.ForwardSetState(SCE_B_DEFAULT);
|
|
} else {
|
|
sc.ChangeState(SCE_B_DATE);
|
|
}
|
|
if (sc.state != SCE_B_FILENUMBER) {
|
|
fileNbDigits = 0;
|
|
}
|
|
} else if (sc.state == SCE_B_DATE) {
|
|
if (sc.atLineEnd) {
|
|
visibleChars = 0;
|
|
sc.ChangeState(SCE_B_STRINGEOL);
|
|
sc.ForwardSetState(SCE_B_DEFAULT);
|
|
} else if (sc.ch == '#') {
|
|
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 == '#') {
|
|
// It can be a date literal, ending with #, or a file number, from 1 to 511
|
|
// The date literal depends on the locale, so anything can go between #'s.
|
|
// Can be #January 1, 1993# or #1 Jan 93# or #05/11/2003#, etc.
|
|
// So we set the FILENUMBER state, and switch to DATE if it isn't a file number
|
|
sc.SetState(SCE_B_FILENUMBER);
|
|
} else if (sc.ch == '&' && MakeLowerCase(sc.chNext) == 'h') {
|
|
// Hexadecimal number
|
|
sc.SetState(SCE_B_NUMBER);
|
|
sc.Forward();
|
|
} else if (sc.ch == '&' && MakeLowerCase(sc.chNext) == 'o') {
|
|
// Octal number
|
|
sc.SetState(SCE_B_NUMBER);
|
|
sc.Forward();
|
|
} else if (sc.ch == '&' && MakeLowerCase(sc.chNext) == 'b') {
|
|
// Binary number
|
|
sc.SetState(SCE_B_NUMBER);
|
|
sc.Forward();
|
|
} 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_IDENTIFIER);
|
|
} else if (isoperator(sc.ch) || (sc.ch == '\\')) { // Integer division
|
|
sc.SetState(SCE_B_OPERATOR);
|
|
}
|
|
}
|
|
|
|
if (sc.atLineEnd) {
|
|
visibleChars = 0;
|
|
}
|
|
if (!IsASpace(sc.ch)) {
|
|
visibleChars++;
|
|
}
|
|
}
|
|
|
|
if (sc.state == SCE_B_IDENTIFIER && !IsAWordChar(sc.ch)) {
|
|
CheckIdentifier(sc);
|
|
}
|
|
|
|
sc.Complete();
|
|
}
|
|
|
|
void LexerVB::Fold(Sci_PositionU startPos, Sci_Position length, int, IDocument *pAccess) {
|
|
Accessor styler(pAccess, nullptr);
|
|
const Sci_Position endPos = startPos + length;
|
|
|
|
// Backtrack to previous line in case need to fix its fold status
|
|
Sci_Position 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 (Sci_Position i = startPos; i < endPos; i++) {
|
|
const char ch = chNext;
|
|
chNext = styler.SafeGetCharAt(i + 1);
|
|
|
|
if ((ch == '\r' && chNext != '\n') || (ch == '\n') || (i == endPos)) {
|
|
int lev = indentCurrent;
|
|
const 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;
|
|
const 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++;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
extern const LexerModule lmVB(SCLEX_VB, LexerVB::LexerFactoryVB, "vb", vbWordListDesc);
|
|
extern const LexerModule lmVBScript(SCLEX_VBSCRIPT, LexerVB::LexerFactoryVBScript, "vbscript", vbWordListDesc);
|