321 lines
9.4 KiB
C++
321 lines
9.4 KiB
C++
// Scintilla source code edit control
|
|
/** @file LexPOV.cxx
|
|
** Lexer for POV-Ray SDL (Persistance of Vision Raytracer, Scene Description Language).
|
|
** Written by Philippe Lhoste but this is mostly a derivative of LexCPP...
|
|
**/
|
|
// Copyright 1998-2005 by Neil Hodgson <neilh@scintilla.org>
|
|
// The License.txt file describes the conditions under which this software may be distributed.
|
|
|
|
// Some points that distinguish from a simple C lexer:
|
|
// Identifiers start only by a character.
|
|
// No line continuation character.
|
|
// Strings are limited to 256 characters.
|
|
// Directives are similar to preprocessor commands,
|
|
// but we match directive keywords and colorize incorrect ones.
|
|
// Block comments can be nested (code stolen from my code in LexLua).
|
|
|
|
#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(int ch) {
|
|
return ch < 0x80 && (isalnum(ch) || ch == '_');
|
|
}
|
|
|
|
static inline bool IsAWordStart(int ch) {
|
|
return ch < 0x80 && isalpha(ch);
|
|
}
|
|
|
|
static inline bool IsANumberChar(int ch) {
|
|
// Not exactly following number definition (several dots are seen as OK, etc.)
|
|
// but probably enough in most cases.
|
|
return (ch < 0x80) &&
|
|
(isdigit(ch) || toupper(ch) == 'E' ||
|
|
ch == '.' || ch == '-' || ch == '+');
|
|
}
|
|
|
|
static void ColourisePovDoc(
|
|
Sci_PositionU startPos,
|
|
Sci_Position length,
|
|
int initStyle,
|
|
WordList *keywordlists[],
|
|
Accessor &styler) {
|
|
|
|
WordList &keywords1 = *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 block comment /* */ nesting level, if we are inside such a comment.
|
|
int blockCommentLevel = 0;
|
|
if (initStyle == SCE_POV_COMMENT) {
|
|
blockCommentLevel = styler.GetLineState(currentLine - 1);
|
|
}
|
|
|
|
// Do not leak onto next line
|
|
if (initStyle == SCE_POV_STRINGEOL || initStyle == SCE_POV_COMMENTLINE) {
|
|
initStyle = SCE_POV_DEFAULT;
|
|
}
|
|
|
|
short stringLen = 0;
|
|
|
|
StyleContext sc(startPos, length, initStyle, styler);
|
|
|
|
for (; sc.More(); sc.Forward()) {
|
|
if (sc.atLineEnd) {
|
|
// Update the line state, so it can be seen by next line
|
|
currentLine = styler.GetLine(sc.currentPos);
|
|
if (sc.state == SCE_POV_COMMENT) {
|
|
// Inside a block comment, we set the line state
|
|
styler.SetLineState(currentLine, blockCommentLevel);
|
|
} else {
|
|
// Reset the line state
|
|
styler.SetLineState(currentLine, 0);
|
|
}
|
|
}
|
|
|
|
if (sc.atLineStart && (sc.state == SCE_POV_STRING)) {
|
|
// Prevent SCE_POV_STRINGEOL from leaking back to previous line
|
|
sc.SetState(SCE_POV_STRING);
|
|
}
|
|
|
|
// Determine if the current state should terminate.
|
|
if (sc.state == SCE_POV_OPERATOR) {
|
|
sc.SetState(SCE_POV_DEFAULT);
|
|
} else if (sc.state == SCE_POV_NUMBER) {
|
|
// We stop the number definition on non-numerical non-dot non-eE non-sign char
|
|
if (!IsANumberChar(sc.ch)) {
|
|
sc.SetState(SCE_POV_DEFAULT);
|
|
}
|
|
} else if (sc.state == SCE_POV_IDENTIFIER) {
|
|
if (!IsAWordChar(sc.ch)) {
|
|
char s[100];
|
|
sc.GetCurrent(s, sizeof(s));
|
|
if (keywords2.InList(s)) {
|
|
sc.ChangeState(SCE_POV_WORD2);
|
|
} else if (keywords3.InList(s)) {
|
|
sc.ChangeState(SCE_POV_WORD3);
|
|
} else if (keywords4.InList(s)) {
|
|
sc.ChangeState(SCE_POV_WORD4);
|
|
} else if (keywords5.InList(s)) {
|
|
sc.ChangeState(SCE_POV_WORD5);
|
|
} else if (keywords6.InList(s)) {
|
|
sc.ChangeState(SCE_POV_WORD6);
|
|
} else if (keywords7.InList(s)) {
|
|
sc.ChangeState(SCE_POV_WORD7);
|
|
} else if (keywords8.InList(s)) {
|
|
sc.ChangeState(SCE_POV_WORD8);
|
|
}
|
|
sc.SetState(SCE_POV_DEFAULT);
|
|
}
|
|
} else if (sc.state == SCE_POV_DIRECTIVE) {
|
|
if (!IsAWordChar(sc.ch)) {
|
|
char s[100];
|
|
char *p;
|
|
sc.GetCurrent(s, sizeof(s));
|
|
p = s;
|
|
// Skip # and whitespace between # and directive word
|
|
do {
|
|
p++;
|
|
} while ((*p == ' ' || *p == '\t') && *p != '\0');
|
|
if (!keywords1.InList(p)) {
|
|
sc.ChangeState(SCE_POV_BADDIRECTIVE);
|
|
}
|
|
sc.SetState(SCE_POV_DEFAULT);
|
|
}
|
|
} else if (sc.state == SCE_POV_COMMENT) {
|
|
if (sc.Match('/', '*')) {
|
|
blockCommentLevel++;
|
|
sc.Forward();
|
|
} else if (sc.Match('*', '/') && blockCommentLevel > 0) {
|
|
blockCommentLevel--;
|
|
sc.Forward();
|
|
if (blockCommentLevel == 0) {
|
|
sc.ForwardSetState(SCE_POV_DEFAULT);
|
|
}
|
|
}
|
|
} else if (sc.state == SCE_POV_COMMENTLINE) {
|
|
if (sc.atLineEnd) {
|
|
sc.ForwardSetState(SCE_POV_DEFAULT);
|
|
}
|
|
} else if (sc.state == SCE_POV_STRING) {
|
|
if (sc.ch == '\\') {
|
|
stringLen++;
|
|
if (strchr("abfnrtuv0'\"", sc.chNext)) {
|
|
// Compound characters are counted as one.
|
|
// Note: for Unicode chars \u, we shouldn't count the next 4 digits...
|
|
sc.Forward();
|
|
}
|
|
} else if (sc.ch == '\"') {
|
|
sc.ForwardSetState(SCE_POV_DEFAULT);
|
|
} else if (sc.atLineEnd) {
|
|
sc.ChangeState(SCE_POV_STRINGEOL);
|
|
sc.ForwardSetState(SCE_POV_DEFAULT);
|
|
} else {
|
|
stringLen++;
|
|
}
|
|
if (stringLen > 256) {
|
|
// Strings are limited to 256 chars
|
|
sc.SetState(SCE_POV_STRINGEOL);
|
|
}
|
|
} else if (sc.state == SCE_POV_STRINGEOL) {
|
|
if (sc.ch == '\\') {
|
|
if (sc.chNext == '\"' || sc.chNext == '\\') {
|
|
sc.Forward();
|
|
}
|
|
} else if (sc.ch == '\"') {
|
|
sc.ForwardSetState(SCE_C_DEFAULT);
|
|
} else if (sc.atLineEnd) {
|
|
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.SetState(SCE_POV_IDENTIFIER);
|
|
} else if (sc.Match('/', '*')) {
|
|
blockCommentLevel = 1;
|
|
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);
|
|
stringLen = 0;
|
|
} else if (sc.ch == '#') {
|
|
sc.SetState(SCE_POV_DIRECTIVE);
|
|
// Skip whitespace between # and directive word
|
|
do {
|
|
sc.Forward();
|
|
} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
|
|
if (sc.atLineEnd) {
|
|
sc.SetState(SCE_POV_DEFAULT);
|
|
}
|
|
} else if (isoperator(static_cast<char>(sc.ch))) {
|
|
sc.SetState(SCE_POV_OPERATOR);
|
|
}
|
|
}
|
|
}
|
|
sc.Complete();
|
|
}
|
|
|
|
static void FoldPovDoc(
|
|
Sci_PositionU startPos,
|
|
Sci_Position length,
|
|
int initStyle,
|
|
WordList *[],
|
|
Accessor &styler) {
|
|
|
|
bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
|
|
bool foldDirective = styler.GetPropertyInt("fold.directive") != 0;
|
|
bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
|
|
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];
|
|
int styleNext = styler.StyleAt(startPos);
|
|
int style = initStyle;
|
|
for (Sci_PositionU 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_POV_COMMENT)) {
|
|
if (stylePrev != SCE_POV_COMMENT) {
|
|
levelCurrent++;
|
|
} else if ((styleNext != SCE_POV_COMMENT) && !atEOL) {
|
|
// Comments don't end at end of line and the next character may be unstyled.
|
|
levelCurrent--;
|
|
}
|
|
}
|
|
if (foldComment && (style == SCE_POV_COMMENTLINE)) {
|
|
if ((ch == '/') && (chNext == '/')) {
|
|
char chNext2 = styler.SafeGetCharAt(i + 2);
|
|
if (chNext2 == '{') {
|
|
levelCurrent++;
|
|
} else if (chNext2 == '}') {
|
|
levelCurrent--;
|
|
}
|
|
}
|
|
}
|
|
if (foldDirective && (style == SCE_POV_DIRECTIVE)) {
|
|
if (ch == '#') {
|
|
Sci_PositionU j=i+1;
|
|
while ((j<endPos) && IsASpaceOrTab(styler.SafeGetCharAt(j))) {
|
|
j++;
|
|
}
|
|
}
|
|
}
|
|
if (style == SCE_POV_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 povWordLists[] = {
|
|
"Language directives",
|
|
"Objects & CSG & Appearance",
|
|
"Types & Modifiers & Items",
|
|
"Predefined Identifiers",
|
|
"Predefined Functions",
|
|
"User defined 1",
|
|
"User defined 2",
|
|
"User defined 3",
|
|
0,
|
|
};
|
|
|
|
LexerModule lmPOV(SCLEX_POV, ColourisePovDoc, "pov", FoldPovDoc, povWordLists);
|