Added POV-Ray lexer by Steven te Brinke.

1 files changed, 222 insertions, 0 deletions

diff --git a/src/LexPOV.cxx b/src/LexPOV.cxx
new file mode 100644
index 000000000..93f773bdf
--- /dev/null
+++ b/src/LexPOV.cxx
@@ -0,0 +1,222 @@
+// 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("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);