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// Scintilla source code edit control
/** @file LexPB.cxx
** Lexer for PowerBasic by Roland Walter, roland@rowalt.de
** Last update: 17.10.2003 (toggling of subs/functions now until next sub/functin - this gives better results)
**/
//
// Necessary changes in Scintilla project:
// - In SciLexer.h and Scintilla.iface:
//
// #define SCLEX_PB 51 //ID for PowerBasic lexer
// (...)
// #define SCE_B_DEFAULT 0 //in both VB and PB lexer
// #define SCE_B_COMMENT 1 //in both VB and PB lexer
// #define SCE_B_NUMBER 2 //in both VB and PB lexer
// #define SCE_B_KEYWORD 3 //in both VB and PB lexer
// #define SCE_B_STRING 4 //in both VB and PB lexer
// #define SCE_B_PREPROCESSOR 5 //VB lexer only, unsupported by PB lexer
// #define SCE_B_OPERATOR 6 //in both VB and PB lexer
// #define SCE_B_IDENTIFIER 7 //in both VB and PB lexer
// #define SCE_B_DATE 8 //VB lexer only, unsupported by PB lexer
// - Statement added to KeyWords.cxx: 'LINK_LEXER(lmPB);'
// - Statement added to scintilla_vc6.mak: '$(DIR_O)\LexPB.obj: ...\src\LexPB.cxx $(LEX_HEADERS)'
//
// Copyright for Scintilla: 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdarg.h>
#include "Platform.h"
#include "PropSet.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"
static inline bool IsTypeCharacter(const int ch) {
return ch == '%' || ch == '&' || ch == '@' || ch == '!' || ch == '#' || ch == '$';
}
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 == '_');
}
bool MatchUpperCase(Accessor &styler, int pos, const char *s) //Same as styler.Match() but uppercase comparison (a-z,A-Z and space only)
{
char ch;
for (int i=0; *s; i++)
{
ch=styler.SafeGetCharAt(pos+i);
if (ch > 0x60) ch -= '\x20';
if (*s != ch) return false;
s++;
}
return true;
}
static void ColourisePBDoc(unsigned int startPos, int length, int initStyle,WordList *keywordlists[],
Accessor &styler) {
WordList &keywords = *keywordlists[0];
styler.StartAt(startPos);
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 (!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)
{
// PB 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);}
}
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 == '#')
{ int n = 1;
int chSeek = ' ';
while ((n < 100) && (chSeek == ' ' || chSeek == '\t'))
{
chSeek = sc.GetRelative(n);
n++;
}
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) == 'b') {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);}
}
}
sc.Complete();
}
static void FoldPBDoc(unsigned int startPos, int length, int, WordList *[], Accessor &styler)
{
// No folding enabled, no reason to continue...
if( styler.GetPropertyInt("fold") == 0 )
return;
unsigned int endPos = startPos + length;
int lineCurrent = styler.GetLine(startPos);
int levelCurrent = SC_FOLDLEVELBASE;
if (lineCurrent > 0)
levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
int levelNext = levelCurrent;
char chNext = styler[startPos];
bool atEOL=1;
for (unsigned int i = startPos; i < endPos; i++)
{
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
if( atEOL ) //Begin of a new line (The Sub/Function/Macro keywords may occur at begin of line only)
{
if( MatchUpperCase(styler,i,"FUNCTION") ) //else if(
{
styler.SetLevel(lineCurrent, (SC_FOLDLEVELBASE << 16) | SC_FOLDLEVELHEADERFLAG);
levelNext=SC_FOLDLEVELBASE+1;
}
else if( MatchUpperCase(styler,i,"CALLBACK FUNCTION") )
{
styler.SetLevel(lineCurrent, (SC_FOLDLEVELBASE << 16) | SC_FOLDLEVELHEADERFLAG);
levelNext=SC_FOLDLEVELBASE+1;
}
else if( MatchUpperCase(styler,i,"STATIC FUNCTION") )
{
styler.SetLevel(lineCurrent, (SC_FOLDLEVELBASE << 16) | SC_FOLDLEVELHEADERFLAG);
levelNext=SC_FOLDLEVELBASE+1;
}
else if( MatchUpperCase(styler,i,"SUB") )
{
styler.SetLevel(lineCurrent, (SC_FOLDLEVELBASE << 16) | SC_FOLDLEVELHEADERFLAG);
levelNext=SC_FOLDLEVELBASE+1;
}
else if( MatchUpperCase(styler,i,"STATIC SUB") )
{
styler.SetLevel(lineCurrent, (SC_FOLDLEVELBASE << 16) | SC_FOLDLEVELHEADERFLAG);
levelNext=SC_FOLDLEVELBASE+1;
}
//else if( MatchUpperCase(styler,i,"MACRO") ) //ToDo: What's with single-line macros?
}
atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if( atEOL )
{
lineCurrent++;
levelCurrent = levelNext;
}
}
if (levelNext == SC_FOLDLEVELBASE)
{
int levelUse = levelCurrent;
int lev = levelUse | levelNext << 16;
styler.SetLevel(lineCurrent, lev);
}
}
static const char * const pbWordListDesc[] = {
"Keywords",
0
};
LexerModule lmPB(SCLEX_POWERBASIC, ColourisePBDoc, "powerbasic", FoldPBDoc, pbWordListDesc);
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