366 lines
12 KiB
C++
Executable File
366 lines
12 KiB
C++
Executable File
// Scintilla source code edit control
|
|
// @file LexPB.cxx
|
|
// Lexer for PowerBasic by Roland Walter, roland@rowalt.de (for PowerBasic see www.powerbasic.com)
|
|
//
|
|
// Changes:
|
|
// 17.10.2003: Toggling of subs/functions now until next sub/function - this gives better results
|
|
// 29.10.2003: 1. Bug: Toggling didn't work for subs/functions added in editor
|
|
// 2. Own colors for PB constants and Inline Assembler SCE_B_CONSTANT and SCE_B_ASM
|
|
// 3. Several smaller syntax coloring improvements and speed optimizations
|
|
// 12.07.2004: 1. Toggling for macros added
|
|
// 2. Further folding speed optimitations (for people dealing with very large listings)
|
|
//
|
|
// Necessary changes for the PB lexer in Scintilla project:
|
|
// - In SciLexer.h and Scintilla.iface:
|
|
//
|
|
// #define SCLEX_POWERBASIC 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, not in 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, not in PB lexer
|
|
// #define SCE_B_CONSTANT 13 //PB lexer only, not in VB lexer
|
|
// #define SCE_B_ASM 14 //PB lexer only, not in VB lexer
|
|
|
|
// - Statement added to KeyWords.cxx: 'LINK_LEXER(lmPB);'
|
|
// - Statement added to scintilla_vc6.mak: '$(DIR_O)\LexPB.obj: ...\src\LexPB.cxx $(LEX_HEADERS)'
|
|
//
|
|
// Copyright for Scintilla: 1998-2001 by Neil Hodgson <neilh@scintilla.org>
|
|
// The License.txt file describes the conditions under which this software may be distributed.
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
#include <assert.h>
|
|
#include <ctype.h>
|
|
|
|
#include "ILexer.h"
|
|
#include "Scintilla.h"
|
|
#include "SciLexer.h"
|
|
|
|
#include "WordList.h"
|
|
#include "LexAccessor.h"
|
|
#include "Accessor.h"
|
|
#include "StyleContext.h"
|
|
#include "CharacterSet.h"
|
|
#include "LexerModule.h"
|
|
|
|
#ifdef SCI_NAMESPACE
|
|
using namespace Scintilla;
|
|
#endif
|
|
|
|
static inline bool IsTypeCharacter(const int ch)
|
|
{
|
|
return ch == '%' || ch == '&' || ch == '@' || ch == '!' || ch == '#' || ch == '$' || 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()) {
|
|
switch (sc.state)
|
|
{
|
|
case SCE_B_OPERATOR:
|
|
{
|
|
sc.SetState(SCE_B_DEFAULT);
|
|
break;
|
|
}
|
|
case SCE_B_KEYWORD:
|
|
{
|
|
if (!IsAWordChar(sc.ch))
|
|
{
|
|
if (!IsTypeCharacter(sc.ch))
|
|
{
|
|
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 if (strcmp(s, "asm") == 0)
|
|
{
|
|
sc.ChangeState(SCE_B_ASM);
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case SCE_B_NUMBER:
|
|
{
|
|
if (!IsAWordChar(sc.ch)) {sc.SetState(SCE_B_DEFAULT);}
|
|
break;
|
|
}
|
|
case SCE_B_STRING:
|
|
{
|
|
if (sc.ch == '\"'){sc.ForwardSetState(SCE_B_DEFAULT);}
|
|
break;
|
|
}
|
|
case SCE_B_CONSTANT:
|
|
{
|
|
if (!IsAWordChar(sc.ch)) {sc.SetState(SCE_B_DEFAULT);}
|
|
break;
|
|
}
|
|
case SCE_B_COMMENT:
|
|
{
|
|
if (sc.atLineEnd) {sc.SetState(SCE_B_DEFAULT);}
|
|
break;
|
|
}
|
|
case SCE_B_ASM:
|
|
{
|
|
if (sc.atLineEnd) {sc.SetState(SCE_B_DEFAULT);}
|
|
break;
|
|
}
|
|
} //switch (sc.state)
|
|
|
|
// Determine if a new state should be entered:
|
|
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 == '&' && 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.SetState(SCE_B_KEYWORD);}
|
|
else if (sc.ch == '%') {sc.SetState(SCE_B_CONSTANT);}
|
|
else if (sc.ch == '$') {sc.SetState(SCE_B_CONSTANT);}
|
|
else if (sc.ch == '#') {sc.SetState(SCE_B_KEYWORD);}
|
|
else if (sc.ch == '!') {sc.SetState(SCE_B_ASM);}
|
|
else if (isoperator(static_cast<char>(sc.ch)) || (sc.ch == '\\')) {sc.SetState(SCE_B_OPERATOR);}
|
|
}
|
|
} //for (; sc.More(); sc.Forward())
|
|
sc.Complete();
|
|
}
|
|
|
|
//The folding routine for PowerBasic toggles SUBs and FUNCTIONs only. This was exactly what I wanted,
|
|
//nothing more. I had worked with this kind of toggling for several years when I used the great good old
|
|
//GFA Basic which is dead now. After testing the feature of toggling FOR-NEXT loops, WHILE-WEND loops
|
|
//and so on too I found this is more disturbing then helping (for me). So if You think in another way
|
|
//you can (or must) write Your own toggling routine ;-)
|
|
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 fNewLine=true;
|
|
bool fMightBeMultiLineMacro=false;
|
|
bool fBeginOfCommentFound=false;
|
|
for (unsigned int i = startPos; i < endPos; i++)
|
|
{
|
|
char ch = chNext;
|
|
chNext = styler.SafeGetCharAt(i + 1);
|
|
|
|
if (fNewLine) //Begin of a new line (The Sub/Function/Macro keywords may occur at begin of line only)
|
|
{
|
|
fNewLine=false;
|
|
fBeginOfCommentFound=false;
|
|
switch (ch)
|
|
{
|
|
case ' ': //Most lines start with space - so check this first, the code is the same as for 'default:'
|
|
case '\t': //Handle tab too
|
|
{
|
|
int levelUse = levelCurrent;
|
|
int lev = levelUse | levelNext << 16;
|
|
styler.SetLevel(lineCurrent, lev);
|
|
break;
|
|
}
|
|
case 'F':
|
|
case 'f':
|
|
{
|
|
switch (chNext)
|
|
{
|
|
case 'U':
|
|
case 'u':
|
|
{
|
|
if( MatchUpperCase(styler,i,"FUNCTION") )
|
|
{
|
|
styler.SetLevel(lineCurrent, (SC_FOLDLEVELBASE << 16) | SC_FOLDLEVELHEADERFLAG);
|
|
levelNext=SC_FOLDLEVELBASE+1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case 'S':
|
|
case 's':
|
|
{
|
|
switch (chNext)
|
|
{
|
|
case 'U':
|
|
case 'u':
|
|
{
|
|
if( MatchUpperCase(styler,i,"SUB") )
|
|
{
|
|
styler.SetLevel(lineCurrent, (SC_FOLDLEVELBASE << 16) | SC_FOLDLEVELHEADERFLAG);
|
|
levelNext=SC_FOLDLEVELBASE+1;
|
|
}
|
|
break;
|
|
}
|
|
case 'T':
|
|
case 't':
|
|
{
|
|
if( MatchUpperCase(styler,i,"STATIC FUNCTION") )
|
|
{
|
|
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;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case 'C':
|
|
case 'c':
|
|
{
|
|
switch (chNext)
|
|
{
|
|
case 'A':
|
|
case 'a':
|
|
{
|
|
if( MatchUpperCase(styler,i,"CALLBACK FUNCTION") )
|
|
{
|
|
styler.SetLevel(lineCurrent, (SC_FOLDLEVELBASE << 16) | SC_FOLDLEVELHEADERFLAG);
|
|
levelNext=SC_FOLDLEVELBASE+1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case 'M':
|
|
case 'm':
|
|
{
|
|
switch (chNext)
|
|
{
|
|
case 'A':
|
|
case 'a':
|
|
{
|
|
if( MatchUpperCase(styler,i,"MACRO") )
|
|
{
|
|
fMightBeMultiLineMacro=true; //Set folder level at end of line, we have to check for single line macro
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
int levelUse = levelCurrent;
|
|
int lev = levelUse | levelNext << 16;
|
|
styler.SetLevel(lineCurrent, lev);
|
|
break;
|
|
}
|
|
} //switch (ch)
|
|
} //if( fNewLine )
|
|
|
|
switch (ch)
|
|
{
|
|
case '=': //To test single line macros
|
|
{
|
|
if (fBeginOfCommentFound==false)
|
|
fMightBeMultiLineMacro=false; //The found macro is a single line macro only;
|
|
break;
|
|
}
|
|
case '\'': //A comment starts
|
|
{
|
|
fBeginOfCommentFound=true;
|
|
break;
|
|
}
|
|
case '\n':
|
|
{
|
|
if (fMightBeMultiLineMacro) //The current line is the begin of a multi line macro
|
|
{
|
|
fMightBeMultiLineMacro=false;
|
|
styler.SetLevel(lineCurrent, (SC_FOLDLEVELBASE << 16) | SC_FOLDLEVELHEADERFLAG);
|
|
levelNext=SC_FOLDLEVELBASE+1;
|
|
}
|
|
lineCurrent++;
|
|
levelCurrent = levelNext;
|
|
fNewLine=true;
|
|
break;
|
|
}
|
|
case '\r':
|
|
{
|
|
if (chNext != '\n')
|
|
{
|
|
lineCurrent++;
|
|
levelCurrent = levelNext;
|
|
fNewLine=true;
|
|
}
|
|
break;
|
|
}
|
|
} //switch (ch)
|
|
} //for (unsigned int i = startPos; i < endPos; i++)
|
|
}
|
|
|
|
static const char * const pbWordListDesc[] = {
|
|
"Keywords",
|
|
0
|
|
};
|
|
|
|
LexerModule lmPB(SCLEX_POWERBASIC, ColourisePBDoc, "powerbasic", FoldPBDoc, pbWordListDesc);
|