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-rwxr-xr-xsrc/LexPOV.cpp312
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diff --git a/src/LexPOV.cpp b/src/LexPOV.cpp
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+// 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 <[email protected]>
+// 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 <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"
+
+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(
+ unsigned int startPos,
+ int 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];
+
+ int 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(
+ unsigned int startPos,
+ int 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;
+ 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 && (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 == '#') {
+ unsigned int 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);
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