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// Scintilla source code edit control
/** @file LexPOV.cxx
** Lexer for POV-Ray, based on lexer for C++.
**/
// Copyright 2003 by Steven te Brinke <steven.t.b@zonnet.nl>
// The License.txt file describes the conditions under which this software may be distributed.
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdarg.h>
#include "Platform.h"
#include "PropSet.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"
#define KEYWORD_BOXHEADER 1
#define KEYWORD_FOLDCONTRACTED 2
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 == '_');
}
static inline bool IsStateComment(const int state) {
return ((state == SCE_POV_COMMENT) ||
(state == SCE_POV_COMMENTLINE) ||
(state == SCE_POV_COMMENTDOC));
}
static inline bool IsStateString(const int state) {
return ((state == SCE_POV_STRING));
}
static void ColourisePOVDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &keywords = *keywordlists[0];
WordList &keywords2 = *keywordlists[1];
// Do not leak onto next line
/*if (initStyle == SCE_POV_STRINGEOL)
initStyle = SCE_POV_DEFAULT;*/
StyleContext sc(startPos, length, initStyle, styler);
bool caseSensitive = styler.GetPropertyInt("pov.case.sensitive", 1) != 0;
for (; sc.More(); sc.Forward()) {
/*if (sc.atLineStart && (sc.state == SCE_POV_STRING)) {
// Prevent SCE_POV_STRINGEOL from leaking back to previous line
sc.SetState(SCE_POV_STRING);
}*/
// Handle line continuation generically.
if (sc.ch == '\\') {
if (sc.chNext == '\n' || sc.chNext == '\r') {
sc.Forward();
if (sc.ch == '\r' && sc.chNext == '\n') {
sc.Forward();
}
continue;
}
}
// Determine if the current state should terminate.
if (sc.state == SCE_POV_OPERATOR || sc.state == SCE_POV_BRACE) {
sc.SetState(SCE_POV_DEFAULT);
} else if (sc.state == SCE_POV_NUMBER) {
if (!IsADigit(sc.ch) || sc.ch != '.') {
sc.SetState(SCE_POV_DEFAULT);
}
} else if (sc.state == SCE_POV_IDENTIFIER) {
if (!IsAWordChar(sc.ch) || (sc.ch == '.')) {
char s[100];
if (caseSensitive) {
sc.GetCurrent(s, sizeof(s));
} else {
sc.GetCurrentLowered(s, sizeof(s));
}
if (keywords.InList(s)) {
sc.ChangeState(SCE_POV_WORD);
} else if (keywords2.InList(s)) {
sc.ChangeState(SCE_POV_WORD2);
}
sc.SetState(SCE_POV_DEFAULT);
}
} else if (sc.state == SCE_POV_COMMENT) {
if (sc.Match('*', '/')) {
sc.Forward();
sc.ForwardSetState(SCE_POV_DEFAULT);
}
} else if (sc.state == SCE_POV_COMMENTDOC) {
if (sc.Match('*', '/')) {
sc.Forward();
sc.ForwardSetState(SCE_POV_DEFAULT);
}
} else if (sc.state == SCE_POV_COMMENTLINE) {
if (sc.atLineEnd) {
sc.SetState(SCE_POV_DEFAULT);
}
} else if (sc.state == SCE_POV_STRING) {
if (sc.ch == '\\') {
if (sc.chNext == '\"' || sc.chNext == '\\') {
sc.Forward();
}
} else if (sc.ch == '\"') {
sc.ForwardSetState(SCE_POV_DEFAULT);
}
}
// Determine if a new state should be entered.
if (sc.state == SCE_POV_DEFAULT) {
if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_POV_NUMBER);
} else if (IsAWordStart(sc.ch) || (sc.ch == '#')) {
sc.SetState(SCE_POV_IDENTIFIER);
} else if (sc.Match('/', '*')) {
sc.SetState(SCE_POV_COMMENT);
sc.Forward(); // Eat the * so it isn't used for the end of the comment
} else if (sc.Match('/', '/')) {
sc.SetState(SCE_POV_COMMENTLINE);
} else if (sc.ch == '\"') {
sc.SetState(SCE_POV_STRING);
//} else if (isoperator(static_cast<char>(sc.ch))) {
} else if (sc.ch == '+' || sc.ch == '-' || sc.ch == '*' || sc.ch == '/' || sc.ch == '=' || sc.ch == '<' || sc.ch == '>' || sc.ch == '&' || sc.ch == '|' || sc.ch == '!' || sc.ch == '?' || sc.ch == ':') {
sc.SetState(SCE_POV_OPERATOR);
} else if (sc.ch == '{' || sc.ch == '}') {
sc.SetState(SCE_POV_BRACE);
}
}
}
sc.Complete();
}
static bool IsStreamCommentStyle(int style) {
return style == SCE_POV_COMMENT ||
style == SCE_POV_COMMENTDOC;
}
static void FoldNoBoxPOVDoc(unsigned int startPos, int length, int initStyle,
Accessor &styler) {
bool foldComment = styler.GetPropertyInt("fold.comment", 1) != 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;
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 && IsStreamCommentStyle(style)) {
if (!IsStreamCommentStyle(stylePrev)) {
levelCurrent++;
} else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
// Comments don't end at end of line and the next character may be unstyled.
levelCurrent--;
}
}
if (style == SCE_POV_BRACE) {
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 void FoldPOVDoc(unsigned int startPos, int length, int initStyle, WordList *[], Accessor &styler) {
FoldNoBoxPOVDoc(startPos, length, initStyle, styler);
}
static const char * const POVWordLists[] = {
"Primary keywords and identifiers",
"Secondary keywords and identifiers",
0,
};
static void ColourisePOVDocSensitive(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
ColourisePOVDoc(startPos, length, initStyle, keywordlists, styler);
}
LexerModule lmPOV(SCLEX_POV, ColourisePOVDocSensitive, "pov", FoldPOVDoc, POVWordLists);
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