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// Scintilla source code edit control
/** @file LexBB.cxx
** Lexer for BlitzBasic.
**/
// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
// Currently, this only supports the old (2D only) BlitzBasic. But I believe relatively
// few changes would be needed to support the newer versions (Blitz3D, BlitzPlus,
// BlitzMax, ...) - but I don't have them. Mail me (elias <at> users <dot> sf <dot> net)
// for any bugs.
// Folding works for Function/End Function and Type/End Type only.
// The generated styles are:
// val SCE_BB_DEFAULT=0
// val SCE_BB_COMMENT=1
// val SCE_BB_NUMBER=2
// val SCE_BB_STRING=3
// val SCE_BB_OPERATOR=4
// val SCE_BB_IDENTIFIER=5
// val SCE_BB_KEYWORD=6
// val SCE_BB_KEYWORD2=7
// val SCE_BB_KEYWORD3=8
// val SCE_BB_KEYWORD4=9
// val SCE_BB_ERROR=10
#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 IsOperator(int c) {
return isoperator(static_cast<char>(c)) || c == '#' || c == '$' || c == '\\';
}
static bool IsIdentifier(int c) {
return isalnum(c) || c == '_' || c == '.';
}
static bool IsDigit(int c) {
return isdigit(c) || c == '.';
}
static void ColouriseBBDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
styler.StartAt(startPos);
StyleContext sc(startPos, length, initStyle, styler);
// Can't use sc.More() here else we miss the last character
for (; ; sc.Forward()) {
if (sc.state == SCE_BB_IDENTIFIER) {
if (!IsIdentifier(sc.ch)) {
char s[100];
sc.GetCurrentLowered(s, sizeof(s));
for (int i = 0; i < 4; i++)
{
if (keywordlists[i]->InList(s)) {
sc.ChangeState(SCE_BB_KEYWORD + i);
sc.SetState(SCE_BB_IDENTIFIER);
}
}
sc.SetState(SCE_BB_DEFAULT);
}
} else if (sc.state == SCE_BB_OPERATOR) {
if (!IsOperator(sc.ch))
sc.SetState(SCE_BB_DEFAULT);
} else if (sc.state == SCE_BB_NUMBER) {
if (!IsDigit(sc.ch)) {
sc.SetState(SCE_BB_DEFAULT);
}
} else if (sc.state == SCE_BB_STRING) {
if (sc.ch == '"') {
sc.ForwardSetState(SCE_BB_DEFAULT);
}
if (sc.atLineEnd) {
sc.ChangeState(SCE_BB_ERROR);
sc.SetState(SCE_BB_DEFAULT);
}
} else if (sc.state == SCE_BB_COMMENT) {
if (sc.atLineEnd) {
sc.SetState(SCE_BB_DEFAULT);
}
}
if (sc.state == SCE_BB_DEFAULT || sc.state == SCE_BB_ERROR) {
if (sc.Match(';')) {
sc.SetState(SCE_BB_COMMENT);
} else if (sc.Match('"')) {
sc.SetState(SCE_BB_STRING);
} else if (IsDigit(sc.ch)) {
sc.SetState(SCE_BB_NUMBER);
} else if (IsOperator(sc.ch)) {
sc.SetState(SCE_BB_OPERATOR);
} else if (isalnum(sc.ch) || sc.Match('_')) {
sc.SetState(SCE_BB_IDENTIFIER);
} else if (!isspace(sc.ch)) {
sc.SetState(SCE_BB_ERROR);
}
}
if (!sc.More())
break;
}
sc.Complete();
}
static void FoldBBDoc(unsigned int startPos, int length, int,
WordList *[], Accessor &styler) {
int line = styler.GetLine(startPos);
int level = styler.LevelAt(line);
int go = 0;
int endPos = startPos + length;
char word[256];
int wordlen = 0;
int i;
for (i = startPos; i < endPos; i++) {
int c = styler.SafeGetCharAt(i);
if (wordlen) {
word[wordlen] = static_cast<char>(tolower(c));
if (isspace(c)) {
word[wordlen] = '\0';
if (!strcmp(word, "function") ||
!strcmp(word, "type")) {
level |= SC_FOLDLEVELHEADERFLAG;
go = 1;
}
if (!strcmp(word, "end function") ||
!strcmp(word, "end type")) {
go = -1;
}
// Treat any whitespace as single blank.
if (!isspace (word[wordlen - 1])) {
word[wordlen] = ' ';
wordlen++;
}
} else {
wordlen++;
}
} else {
if (!isspace(c))
word[wordlen++] = static_cast<char>(tolower(c));
}
if (c == '\n') {
if (wordlen == 0)
level |= SC_FOLDLEVELWHITEFLAG;
if (level != styler.LevelAt(line))
styler.SetLevel(line, level);
wordlen = 0;
level &= ~SC_FOLDLEVELHEADERFLAG;
level &= ~SC_FOLDLEVELWHITEFLAG;
level += go;
go = 0;
line++;
}
}
}
static const char * const bbWordListDesc[] = {
"Blitzbasic Keywords",
"user1",
"user2",
"user3",
0
};
LexerModule lmBB(SCLEX_BB, ColouriseBBDoc, "bb", FoldBBDoc, bbWordListDesc);
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