Initial import of qscintilla from 2007

1 files changed, 312 insertions, 0 deletions

diff --git a/src/LexPOV.cpp b/src/LexPOV.cpp
new file mode 100755
index 0000000..5cc05ce
--- /dev/null
+++ b/src/LexPOV.cpp
@@ -0,0 +1,312 @@
+// 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 <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);