// Scintilla source code edit control
/** @file LexSTTXT.cxx
** Lexer for Structured Text language.
** Written by Pavel Bulochkin
**/
// 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 void ClassifySTTXTWord(WordList *keywordlists[], StyleContext &sc)
{
char s[256] = { 0 };
sc.GetCurrentLowered(s, sizeof(s));
if ((*keywordlists[0]).InList(s)) {
sc.ChangeState(SCE_STTXT_KEYWORD);
}
else if ((*keywordlists[1]).InList(s)) {
sc.ChangeState(SCE_STTXT_TYPE);
}
else if ((*keywordlists[2]).InList(s)) {
sc.ChangeState(SCE_STTXT_FUNCTION);
}
else if ((*keywordlists[3]).InList(s)) {
sc.ChangeState(SCE_STTXT_FB);
}
else if ((*keywordlists[4]).InList(s)) {
sc.ChangeState(SCE_STTXT_VARS);
}
else if ((*keywordlists[5]).InList(s)) {
sc.ChangeState(SCE_STTXT_PRAGMAS);
}
sc.SetState(SCE_STTXT_DEFAULT);
}
static void ColouriseSTTXTDoc (unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler)
{
StyleContext sc(startPos, length, initStyle, styler);
CharacterSet setWord(CharacterSet::setAlphaNum, "_", 0x80, true);
CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
CharacterSet setNumber(CharacterSet::setDigits, "_.eE");
CharacterSet setHexNumber(CharacterSet::setDigits, "_abcdefABCDEF");
CharacterSet setOperator(CharacterSet::setNone,",.+-*/:;<=>[]()%&");
CharacterSet setDataTime(CharacterSet::setDigits,"_.-:dmshDMSH");
for ( ; sc.More() ; sc.Forward())
{
if(sc.atLineStart && sc.state != SCE_STTXT_COMMENT)
sc.SetState(SCE_STTXT_DEFAULT);
switch(sc.state)
{
case SCE_STTXT_NUMBER: {
if(!setNumber.Contains(sc.ch))
sc.SetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_HEXNUMBER: {
if(setHexNumber.Contains(sc.ch))
continue;
else if(setDataTime.Contains(sc.ch))
sc.SetState(SCE_STTXT_DATETIME);
else
sc.SetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_DATETIME: {
if(!setDataTime.Contains(sc.ch))
sc.SetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_OPERATOR: {
sc.SetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_PRAGMA: {
if (sc.ch == '}')
sc.ForwardSetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_COMMENTLINE: {
if (sc.atLineStart)
sc.SetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_COMMENT: {
if(sc.Match('*',')'))
{
sc.Forward();
sc.ForwardSetState(SCE_STTXT_DEFAULT);
}
break;
}
case SCE_STTXT_STRING1: {
if(sc.atLineEnd)
sc.SetState(SCE_STTXT_STRINGEOL);
else if(sc.ch == '\'' && sc.chPrev != '$')
sc.ForwardSetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_STRING2: {
if (sc.atLineEnd)
sc.SetState(SCE_STTXT_STRINGEOL);
else if(sc.ch == '\"' && sc.chPrev != '$')
sc.ForwardSetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_STRINGEOL: {
if(sc.atLineStart)
sc.SetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_CHARACTER: {
if(setHexNumber.Contains(sc.ch))
sc.SetState(SCE_STTXT_HEXNUMBER);
else if(setDataTime.Contains(sc.ch))
sc.SetState(SCE_STTXT_DATETIME);
else sc.SetState(SCE_STTXT_DEFAULT);
break;
}
case SCE_STTXT_IDENTIFIER: {
if(!setWord.Contains(sc.ch))
ClassifySTTXTWord(keywordlists, sc);
break;
}
}
if(sc.state == SCE_STTXT_DEFAULT)
{
if(IsADigit(sc.ch))
sc.SetState(SCE_STTXT_NUMBER);
else if (setWordStart.Contains(sc.ch))
sc.SetState(SCE_STTXT_IDENTIFIER);
else if (sc.Match('/', '/'))
sc.SetState(SCE_STTXT_COMMENTLINE);
else if(sc.Match('(', '*'))
sc.SetState(SCE_STTXT_COMMENT);
else if (sc.ch == '{')
sc.SetState(SCE_STTXT_PRAGMA);
else if (sc.ch == '\'')
sc.SetState(SCE_STTXT_STRING1);
else if (sc.ch == '\"')
sc.SetState(SCE_STTXT_STRING2);
else if(sc.ch == '#')
sc.SetState(SCE_STTXT_CHARACTER);
else if (setOperator.Contains(sc.ch))
sc.SetState(SCE_STTXT_OPERATOR);
}
}
if (sc.state == SCE_STTXT_IDENTIFIER && setWord.Contains(sc.chPrev))
ClassifySTTXTWord(keywordlists, sc);
sc.Complete();
}
static const char * const STTXTWordListDesc[] = {
"Keywords",
"Types",
"Functions",
"FB",
"Local_Var",
"Local_Pragma",
0
};
static bool IsCommentLine(int line, Accessor &styler, bool type)
{
int pos = styler.LineStart(line);
int eolPos = styler.LineStart(line + 1) - 1;
for (int i = pos; i < eolPos; i++)
{
char ch = styler[i];
char chNext = styler.SafeGetCharAt(i + 1);
int style = styler.StyleAt(i);
if(type) {
if (ch == '/' && chNext == '/' && style == SCE_STTXT_COMMENTLINE)
return true;
}
else if (ch == '(' && chNext == '*' && style == SCE_STTXT_COMMENT)
break;
if (!IsASpaceOrTab(ch))
return false;
}
for (int i = eolPos-2; i>pos; i--)
{
char ch = styler[i];
char chPrev = styler.SafeGetCharAt(i-1);
int style = styler.StyleAt(i);
if(ch == ')' && chPrev == '*' && style == SCE_STTXT_COMMENT)
return true;
if(!IsASpaceOrTab(ch))
return false;
}
return false;
}
static bool IsPragmaLine(int line, Accessor &styler)
{
int pos = styler.LineStart(line);
int eolPos = styler.LineStart(line+1) - 1;
for (int i = pos ; i < eolPos ; i++)
{
char ch = styler[i];
int style = styler.StyleAt(i);
if(ch == '{' && style == SCE_STTXT_PRAGMA)
return true;
else if (!IsASpaceOrTab(ch))
return false;
}
return false;
}
static void GetRangeUpper(unsigned int start,unsigned int end,Accessor &styler,char *s,unsigned int len)
{
unsigned int i = 0;
while ((i < end - start + 1) && (i < len-1)) {
s[i] = static_cast<char>(toupper(styler[start + i]));
i++;
}
s[i] = '\0';
}
static void ClassifySTTXTWordFoldPoint(int &levelCurrent,unsigned int lastStart,
unsigned int currentPos, Accessor &styler)
{
char s[256];
GetRangeUpper(lastStart, currentPos, styler, s, sizeof(s));
// See Table C.2 - Keywords
if (!strcmp(s, "ACTION") ||
!strcmp(s, "CASE") ||
!strcmp(s, "CONFIGURATION") ||
!strcmp(s, "FOR") ||
!strcmp(s, "FUNCTION") ||
!strcmp(s, "FUNCTION_BLOCK") ||
!strcmp(s, "IF") ||
!strcmp(s, "INITIAL_STEP") ||
!strcmp(s, "REPEAT") ||
!strcmp(s, "RESOURCE") ||
!strcmp(s, "STEP") ||
!strcmp(s, "STRUCT") ||
!strcmp(s, "TRANSITION") ||
!strcmp(s, "TYPE") ||
!strcmp(s, "VAR") ||
!strcmp(s, "VAR_INPUT") ||
!strcmp(s, "VAR_OUTPUT") ||
!strcmp(s, "VAR_IN_OUT") ||
!strcmp(s, "VAR_TEMP") ||
!strcmp(s, "VAR_EXTERNAL") ||
!strcmp(s, "VAR_ACCESS") ||
!strcmp(s, "VAR_CONFIG") ||
!strcmp(s, "VAR_GLOBAL") ||
!strcmp(s, "WHILE"))
{
levelCurrent++;
}
else if (!strcmp(s, "END_ACTION") ||
!strcmp(s, "END_CASE") ||
!strcmp(s, "END_CONFIGURATION") ||
!strcmp(s, "END_FOR") ||
!strcmp(s, "END_FUNCTION") ||
!strcmp(s, "END_FUNCTION_BLOCK") ||
!strcmp(s, "END_IF") ||
!strcmp(s, "END_REPEAT") ||
!strcmp(s, "END_RESOURCE") ||
!strcmp(s, "END_STEP") ||
!strcmp(s, "END_STRUCT") ||
!strcmp(s, "END_TRANSITION") ||
!strcmp(s, "END_TYPE") ||
!strcmp(s, "END_VAR") ||
!strcmp(s, "END_WHILE"))
{
levelCurrent--;
if (levelCurrent < SC_FOLDLEVELBASE) {
levelCurrent = SC_FOLDLEVELBASE;
}
}
}
static void FoldSTTXTDoc(unsigned int startPos, int length, int initStyle, WordList *[],Accessor &styler)
{
bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
bool foldPreprocessor = styler.GetPropertyInt("fold.preprocessor") != 0;
bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
unsigned int endPos = startPos + length;
int visibleChars = 0;
int lineCurrent = styler.GetLine(startPos);
int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
int levelCurrent = levelPrev;
char chNext = styler[startPos];
int styleNext = styler.StyleAt(startPos);
int style = initStyle;
int lastStart = 0;
CharacterSet setWord(CharacterSet::setAlphaNum, "_", 0x80, true);
for (unsigned int i = startPos; i < endPos; i++)
{
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
int stylePrev = style;
style = styleNext;
styleNext = styler.StyleAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (foldComment && style == SCE_STTXT_COMMENT) {
if(stylePrev != SCE_STTXT_COMMENT)
levelCurrent++;
else if(styleNext != SCE_STTXT_COMMENT && !atEOL)
levelCurrent--;
}
if ( foldComment && atEOL && ( IsCommentLine(lineCurrent, styler,false)
|| IsCommentLine(lineCurrent,styler,true))) {
if(!IsCommentLine(lineCurrent-1, styler,true) && IsCommentLine(lineCurrent+1, styler,true))
levelCurrent++;
if (IsCommentLine(lineCurrent-1, styler,true) && !IsCommentLine(lineCurrent+1, styler,true))
levelCurrent--;
if (!IsCommentLine(lineCurrent-1, styler,false) && IsCommentLine(lineCurrent+1, styler,false))
levelCurrent++;
if (IsCommentLine(lineCurrent-1, styler,false) && !IsCommentLine(lineCurrent+1, styler,false))
levelCurrent--;
}
if(foldPreprocessor && atEOL && IsPragmaLine(lineCurrent, styler)) {
if(!IsPragmaLine(lineCurrent-1, styler) && IsPragmaLine(lineCurrent+1, styler ))
levelCurrent++;
else if(IsPragmaLine(lineCurrent-1, styler) && !IsPragmaLine(lineCurrent+1, styler))
levelCurrent--;
}
if (stylePrev != SCE_STTXT_KEYWORD && style == SCE_STTXT_KEYWORD) {
lastStart = i;
}
if(stylePrev == SCE_STTXT_KEYWORD) {
if(setWord.Contains(ch) && !setWord.Contains(chNext))
ClassifySTTXTWordFoldPoint(levelCurrent,lastStart, i, styler);
}
if (!IsASpace(ch)) {
visibleChars++;
}
if (atEOL) {
int lev = levelPrev;
if (visibleChars == 0 && foldCompact)
lev |= SC_FOLDLEVELWHITEFLAG;
if ((levelCurrent > levelPrev) && (visibleChars > 0))
lev |= SC_FOLDLEVELHEADERFLAG;
if (lev != styler.LevelAt(lineCurrent))
styler.SetLevel(lineCurrent, lev);
lineCurrent++;
levelPrev = levelCurrent;
visibleChars = 0;
}
// If we didn't reach the EOL in previous loop, store line level and whitespace information.
// The rest will be filled in later...
int lev = levelPrev;
if (visibleChars == 0 && foldCompact)
lev |= SC_FOLDLEVELWHITEFLAG;
styler.SetLevel(lineCurrent, lev);
}
}
LexerModule lmSTTXT(SCLEX_STTXT, ColouriseSTTXTDoc, "fcST", FoldSTTXTDoc, STTXTWordListDesc);
