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// Scintilla source code edit control
/** @file LexLout.cxx
** Lexer for the Basser Lout (>= version 3) typesetting language
**/
// Copyright 2003 by Kein-Hong Man <mkh@pl.jaring.my>
// 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"
using namespace Scintilla;
static inline bool IsAWordChar(const int ch) {
return (ch < 0x80) && (isalpha(ch) || ch == '@' || ch == '_');
}
static inline bool IsAnOther(const int ch) {
return (ch < 0x80) && (ch == '{' || ch == '}' ||
ch == '!' || ch == '$' || ch == '%' || ch == '&' || ch == '\'' ||
ch == '(' || ch == ')' || ch == '*' || ch == '+' || ch == ',' ||
ch == '-' || ch == '.' || ch == '/' || ch == ':' || ch == ';' ||
ch == '<' || ch == '=' || ch == '>' || ch == '?' || ch == '[' ||
ch == ']' || ch == '^' || ch == '`' || ch == '|' || ch == '~');
}
static void ColouriseLoutDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
WordList &keywords = *keywordlists[0];
WordList &keywords2 = *keywordlists[1];
WordList &keywords3 = *keywordlists[2];
int visibleChars = 0;
int firstWordInLine = 0;
int leadingAtSign = 0;
StyleContext sc(startPos, length, initStyle, styler);
for (; sc.More(); sc.Forward()) {
if (sc.atLineStart && (sc.state == SCE_LOUT_STRING)) {
// Prevent SCE_LOUT_STRINGEOL from leaking back to previous line
sc.SetState(SCE_LOUT_STRING);
}
// Determine if the current state should terminate.
if (sc.state == SCE_LOUT_COMMENT) {
if (sc.atLineEnd) {
sc.SetState(SCE_LOUT_DEFAULT);
visibleChars = 0;
}
} else if (sc.state == SCE_LOUT_NUMBER) {
if (!IsADigit(sc.ch) && sc.ch != '.') {
sc.SetState(SCE_LOUT_DEFAULT);
}
} else if (sc.state == SCE_LOUT_STRING) {
if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\"') {
sc.ForwardSetState(SCE_LOUT_DEFAULT);
} else if (sc.atLineEnd) {
sc.ChangeState(SCE_LOUT_STRINGEOL);
sc.ForwardSetState(SCE_LOUT_DEFAULT);
visibleChars = 0;
}
} else if (sc.state == SCE_LOUT_IDENTIFIER) {
if (!IsAWordChar(sc.ch)) {
char s[100];
sc.GetCurrent(s, sizeof(s));
if (leadingAtSign) {
if (keywords.InList(s)) {
sc.ChangeState(SCE_LOUT_WORD);
} else {
sc.ChangeState(SCE_LOUT_WORD4);
}
} else if (firstWordInLine && keywords3.InList(s)) {
sc.ChangeState(SCE_LOUT_WORD3);
}
sc.SetState(SCE_LOUT_DEFAULT);
}
} else if (sc.state == SCE_LOUT_OPERATOR) {
if (!IsAnOther(sc.ch)) {
char s[100];
sc.GetCurrent(s, sizeof(s));
if (keywords2.InList(s)) {
sc.ChangeState(SCE_LOUT_WORD2);
}
sc.SetState(SCE_LOUT_DEFAULT);
}
}
// Determine if a new state should be entered.
if (sc.state == SCE_LOUT_DEFAULT) {
if (sc.ch == '#') {
sc.SetState(SCE_LOUT_COMMENT);
} else if (sc.ch == '\"') {
sc.SetState(SCE_LOUT_STRING);
} else if (IsADigit(sc.ch) ||
(sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_LOUT_NUMBER);
} else if (IsAWordChar(sc.ch)) {
firstWordInLine = (visibleChars == 0);
leadingAtSign = (sc.ch == '@');
sc.SetState(SCE_LOUT_IDENTIFIER);
} else if (IsAnOther(sc.ch)) {
sc.SetState(SCE_LOUT_OPERATOR);
}
}
if (sc.atLineEnd) {
// Reset states to begining of colourise so no surprises
// if different sets of lines lexed.
visibleChars = 0;
}
if (!IsASpace(sc.ch)) {
visibleChars++;
}
}
sc.Complete();
}
static void FoldLoutDoc(Sci_PositionU startPos, Sci_Position length, int, WordList *[],
Accessor &styler) {
Sci_PositionU endPos = startPos + length;
int visibleChars = 0;
Sci_Position lineCurrent = styler.GetLine(startPos);
int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
int levelCurrent = levelPrev;
char chNext = styler[startPos];
bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
int styleNext = styler.StyleAt(startPos);
char s[10] = "";
for (Sci_PositionU i = startPos; i < endPos; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
int style = styleNext;
styleNext = styler.StyleAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (style == SCE_LOUT_WORD) {
if (ch == '@') {
for (Sci_PositionU j = 0; j < 8; j++) {
if (!IsAWordChar(styler[i + j])) {
break;
}
s[j] = styler[i + j];
s[j + 1] = '\0';
}
if (strcmp(s, "@Begin") == 0) {
levelCurrent++;
} else if (strcmp(s, "@End") == 0) {
levelCurrent--;
}
}
} else if (style == SCE_LOUT_OPERATOR) {
if (ch == '{') {
levelCurrent++;
} else if (ch == '}') {
levelCurrent--;
}
}
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 (!isspacechar(ch))
visibleChars++;
}
// Fill in the real level of the next line, keeping the current flags as they will be filled in later
int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
styler.SetLevel(lineCurrent, levelPrev | flagsNext);
}
static const char * const loutWordLists[] = {
"Predefined identifiers",
"Predefined delimiters",
"Predefined keywords",
0,
};
LexerModule lmLout(SCLEX_LOUT, ColouriseLoutDoc, "lout", FoldLoutDoc, loutWordLists);
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