notepad-plus-plus/lexilla/lexers/LexRebol.cxx

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// Scintilla source code edit control
/** @file LexRebol.cxx
** Lexer for REBOL.
** Written by Pascal Hurni, inspired from LexLua by Paul Winwood & Marcos E. Wurzius & Philippe Lhoste
**
** History:
** 2005-04-07 First release.
** 2005-04-10 Closing parens and brackets go now in default style
** String and comment nesting should be more safe
**/
// Copyright 2005 by Pascal Hurni <pascal_hurni@fastmail.fm>
// 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 <string>
#include <string_view>
#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 Lexilla;
static inline bool IsAWordChar(const int ch) {
return (isalnum(ch) || ch == '?' || ch == '!' || ch == '.' || ch == '\'' || ch == '+' || ch == '-' || ch == '*' || ch == '&' || ch == '|' || ch == '=' || ch == '_' || ch == '~');
}
static inline bool IsAWordStart(const int ch, const int ch2) {
return ((ch == '+' || ch == '-' || ch == '.') && !isdigit(ch2)) ||
(isalpha(ch) || ch == '?' || ch == '!' || ch == '\'' || ch == '*' || ch == '&' || ch == '|' || ch == '=' || ch == '_' || ch == '~');
}
static inline bool IsAnOperator(const int ch, const int ch2, const int ch3) {
// One char operators
if (IsASpaceOrTab(ch2)) {
return ch == '+' || ch == '-' || ch == '*' || ch == '/' || ch == '<' || ch == '>' || ch == '=' || ch == '?';
}
// Two char operators
if (IsASpaceOrTab(ch3)) {
return (ch == '*' && ch2 == '*') ||
(ch == '/' && ch2 == '/') ||
(ch == '<' && (ch2 == '=' || ch2 == '>')) ||
(ch == '>' && ch2 == '=') ||
(ch == '=' && (ch2 == '=' || ch2 == '?')) ||
(ch == '?' && ch2 == '?');
}
return false;
}
static inline bool IsBinaryStart(const int ch, const int ch2, const int ch3, const int ch4) {
return (ch == '#' && ch2 == '{') ||
(IsADigit(ch) && ch2 == '#' && ch3 == '{' ) ||
(IsADigit(ch) && IsADigit(ch2) && ch3 == '#' && ch4 == '{' );
}
static void ColouriseRebolDoc(Sci_PositionU startPos, Sci_Position length, int initStyle, WordList *keywordlists[], Accessor &styler) {
WordList &keywords = *keywordlists[0];
WordList &keywords2 = *keywordlists[1];
WordList &keywords3 = *keywordlists[2];
WordList &keywords4 = *keywordlists[3];
WordList &keywords5 = *keywordlists[4];
WordList &keywords6 = *keywordlists[5];
WordList &keywords7 = *keywordlists[6];
WordList &keywords8 = *keywordlists[7];
Sci_Position currentLine = styler.GetLine(startPos);
// Initialize the braced string {.. { ... } ..} nesting level, if we are inside such a string.
int stringLevel = 0;
if (initStyle == SCE_REBOL_BRACEDSTRING || initStyle == SCE_REBOL_COMMENTBLOCK) {
stringLevel = styler.GetLineState(currentLine - 1);
}
bool blockComment = initStyle == SCE_REBOL_COMMENTBLOCK;
int dotCount = 0;
// Do not leak onto next line
if (initStyle == SCE_REBOL_COMMENTLINE) {
initStyle = SCE_REBOL_DEFAULT;
}
StyleContext sc(startPos, length, initStyle, styler);
if (startPos == 0) {
sc.SetState(SCE_REBOL_PREFACE);
}
for (; sc.More(); sc.Forward()) {
//--- What to do at line end ?
if (sc.atLineEnd) {
// Can be either inside a {} string or simply at eol
if (sc.state != SCE_REBOL_BRACEDSTRING && sc.state != SCE_REBOL_COMMENTBLOCK &&
sc.state != SCE_REBOL_BINARY && sc.state != SCE_REBOL_PREFACE)
sc.SetState(SCE_REBOL_DEFAULT);
// Update the line state, so it can be seen by next line
currentLine = styler.GetLine(sc.currentPos);
switch (sc.state) {
case SCE_REBOL_BRACEDSTRING:
case SCE_REBOL_COMMENTBLOCK:
// Inside a braced string, we set the line state
styler.SetLineState(currentLine, stringLevel);
break;
default:
// Reset the line state
styler.SetLineState(currentLine, 0);
break;
}
// continue with next char
continue;
}
//--- What to do on white-space ?
if (IsASpaceOrTab(sc.ch))
{
// Return to default if any of these states
if (sc.state == SCE_REBOL_OPERATOR || sc.state == SCE_REBOL_CHARACTER ||
sc.state == SCE_REBOL_NUMBER || sc.state == SCE_REBOL_PAIR ||
sc.state == SCE_REBOL_TUPLE || sc.state == SCE_REBOL_FILE ||
sc.state == SCE_REBOL_DATE || sc.state == SCE_REBOL_TIME ||
sc.state == SCE_REBOL_MONEY || sc.state == SCE_REBOL_ISSUE ||
sc.state == SCE_REBOL_URL || sc.state == SCE_REBOL_EMAIL) {
sc.SetState(SCE_REBOL_DEFAULT);
}
}
//--- Specialize state ?
// URL, Email look like identifier
if (sc.state == SCE_REBOL_IDENTIFIER)
{
if (sc.ch == ':' && !IsASpace(sc.chNext)) {
sc.ChangeState(SCE_REBOL_URL);
} else if (sc.ch == '@') {
sc.ChangeState(SCE_REBOL_EMAIL);
} else if (sc.ch == '$') {
sc.ChangeState(SCE_REBOL_MONEY);
}
}
// Words look like identifiers
if (sc.state == SCE_REBOL_IDENTIFIER || (sc.state >= SCE_REBOL_WORD && sc.state <= SCE_REBOL_WORD8)) {
// Keywords ?
if (!IsAWordChar(sc.ch) || sc.Match('/')) {
char s[100];
sc.GetCurrentLowered(s, sizeof(s));
blockComment = strcmp(s, "comment") == 0;
if (keywords8.InList(s)) {
sc.ChangeState(SCE_REBOL_WORD8);
} else if (keywords7.InList(s)) {
sc.ChangeState(SCE_REBOL_WORD7);
} else if (keywords6.InList(s)) {
sc.ChangeState(SCE_REBOL_WORD6);
} else if (keywords5.InList(s)) {
sc.ChangeState(SCE_REBOL_WORD5);
} else if (keywords4.InList(s)) {
sc.ChangeState(SCE_REBOL_WORD4);
} else if (keywords3.InList(s)) {
sc.ChangeState(SCE_REBOL_WORD3);
} else if (keywords2.InList(s)) {
sc.ChangeState(SCE_REBOL_WORD2);
} else if (keywords.InList(s)) {
sc.ChangeState(SCE_REBOL_WORD);
}
// Keep same style if there are refinements
if (!sc.Match('/')) {
sc.SetState(SCE_REBOL_DEFAULT);
}
}
// special numbers
} else if (sc.state == SCE_REBOL_NUMBER) {
switch (sc.ch) {
case 'x': sc.ChangeState(SCE_REBOL_PAIR);
break;
case ':': sc.ChangeState(SCE_REBOL_TIME);
break;
case '-':
case '/': sc.ChangeState(SCE_REBOL_DATE);
break;
case '.': if (++dotCount >= 2) sc.ChangeState(SCE_REBOL_TUPLE);
break;
}
}
//--- Determine if the current state should terminate
if (sc.state == SCE_REBOL_QUOTEDSTRING || sc.state == SCE_REBOL_CHARACTER) {
if (sc.ch == '^' && sc.chNext == '\"') {
sc.Forward();
} else if (sc.ch == '\"') {
sc.ForwardSetState(SCE_REBOL_DEFAULT);
}
} else if (sc.state == SCE_REBOL_BRACEDSTRING || sc.state == SCE_REBOL_COMMENTBLOCK) {
if (sc.ch == '}') {
if (--stringLevel == 0) {
sc.ForwardSetState(SCE_REBOL_DEFAULT);
}
} else if (sc.ch == '{') {
stringLevel++;
}
} else if (sc.state == SCE_REBOL_BINARY) {
if (sc.ch == '}') {
sc.ForwardSetState(SCE_REBOL_DEFAULT);
}
} else if (sc.state == SCE_REBOL_TAG) {
if (sc.ch == '>') {
sc.ForwardSetState(SCE_REBOL_DEFAULT);
}
} else if (sc.state == SCE_REBOL_PREFACE) {
if (sc.MatchIgnoreCase("rebol"))
{
int i;
for (i=5; IsASpaceOrTab(styler.SafeGetCharAt(sc.currentPos+i, 0)); i++);
if (sc.GetRelative(i) == '[')
sc.SetState(SCE_REBOL_DEFAULT);
}
}
//--- Parens and bracket changes to default style when the current is a number
if (sc.state == SCE_REBOL_NUMBER || sc.state == SCE_REBOL_PAIR || sc.state == SCE_REBOL_TUPLE ||
sc.state == SCE_REBOL_MONEY || sc.state == SCE_REBOL_ISSUE || sc.state == SCE_REBOL_EMAIL ||
sc.state == SCE_REBOL_URL || sc.state == SCE_REBOL_DATE || sc.state == SCE_REBOL_TIME) {
if (sc.ch == '(' || sc.ch == '[' || sc.ch == ')' || sc.ch == ']') {
sc.SetState(SCE_REBOL_DEFAULT);
}
}
//--- Determine if a new state should be entered.
if (sc.state == SCE_REBOL_DEFAULT) {
if (IsAnOperator(sc.ch, sc.chNext, sc.GetRelative(2))) {
sc.SetState(SCE_REBOL_OPERATOR);
} else if (IsBinaryStart(sc.ch, sc.chNext, sc.GetRelative(2), sc.GetRelative(3))) {
sc.SetState(SCE_REBOL_BINARY);
} else if (IsAWordStart(sc.ch, sc.chNext)) {
sc.SetState(SCE_REBOL_IDENTIFIER);
} else if (IsADigit(sc.ch) || sc.ch == '+' || sc.ch == '-' || /*Decimal*/ sc.ch == '.' || sc.ch == ',') {
dotCount = 0;
sc.SetState(SCE_REBOL_NUMBER);
} else if (sc.ch == '\"') {
sc.SetState(SCE_REBOL_QUOTEDSTRING);
} else if (sc.ch == '{') {
sc.SetState(blockComment ? SCE_REBOL_COMMENTBLOCK : SCE_REBOL_BRACEDSTRING);
++stringLevel;
} else if (sc.ch == ';') {
sc.SetState(SCE_REBOL_COMMENTLINE);
} else if (sc.ch == '$') {
sc.SetState(SCE_REBOL_MONEY);
} else if (sc.ch == '%') {
sc.SetState(SCE_REBOL_FILE);
} else if (sc.ch == '<') {
sc.SetState(SCE_REBOL_TAG);
} else if (sc.ch == '#' && sc.chNext == '"') {
sc.SetState(SCE_REBOL_CHARACTER);
sc.Forward();
} else if (sc.ch == '#' && sc.chNext != '"' && sc.chNext != '{' ) {
sc.SetState(SCE_REBOL_ISSUE);
}
}
}
sc.Complete();
}
static void FoldRebolDoc(Sci_PositionU startPos, Sci_Position length, int /* initStyle */, WordList *[],
Accessor &styler) {
Sci_PositionU lengthDoc = 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];
int styleNext = styler.StyleAt(startPos);
for (Sci_PositionU i = startPos; i < lengthDoc; 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_REBOL_DEFAULT) {
if (ch == '[') {
levelCurrent++;
} else if (ch == ']') {
levelCurrent--;
}
}
if (atEOL) {
int lev = levelPrev;
if (visibleChars == 0)
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 rebolWordListDesc[] = {
"Keywords",
0
};
LexerModule lmREBOL(SCLEX_REBOL, ColouriseRebolDoc, "rebol", FoldRebolDoc, rebolWordListDesc);