You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
320 lines
9.4 KiB
320 lines
9.4 KiB
// 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, |
|
}; |
|
|
|
extern const LexerModule lmPOV(SCLEX_POV, ColourisePovDoc, "pov", FoldPovDoc, povWordLists);
|
|
|