324 lines
11 KiB
C++
324 lines
11 KiB
C++
// 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 "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 (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);
|
|
|