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+// Scintilla source code edit control
+
+// File: LexTeX.cxx - general context conformant tex coloring scheme
+// Author: Hans Hagen - PRAGMA ADE - Hasselt NL - www.pragma-ade.com
+// Version: September 28, 2003
+
+// Copyright: 1998-2003 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+// This lexer is derived from the one written for the texwork environment (1999++) which in
+// turn is inspired on texedit (1991++) which finds its roots in wdt (1986).
+
+// If you run into strange boundary cases, just tell me and I'll look into it.
+
+#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 "KeyWords.h"
+#include "Scintilla.h"
+#include "SciLexer.h"
+#include "StyleContext.h"
+
+// val SCE_TEX_DEFAULT = 0
+// val SCE_TEX_SPECIAL = 1
+// val SCE_TEX_GROUP = 2
+// val SCE_TEX_SYMBOL = 3
+// val SCE_TEX_COMMAND = 4
+// val SCE_TEX_TEXT = 5
+
+// Definitions in SciTEGlobal.properties:
+//
+// TeX Highlighting
+//
+// # Default
+// style.tex.0=fore:#7F7F00
+// # Special
+// style.tex.1=fore:#007F7F
+// # Group
+// style.tex.2=fore:#880000
+// # Symbol
+// style.tex.3=fore:#7F7F00
+// # Command
+// style.tex.4=fore:#008800
+// # Text
+// style.tex.5=fore:#000000
+
+// lexer.tex.interface.default=0
+// lexer.tex.comment.process=0
+
+// todo: lexer.tex.auto.if
+
+// Auxiliary functions:
+
+static inline bool endOfLine(Accessor &styler, unsigned int i) {
+ return
+ (styler[i] == '\n') || ((styler[i] == '\r') && (styler.SafeGetCharAt(i + 1) != '\n')) ;
+}
+
+static inline bool isTeXzero(int ch) {
+ return
+ (ch == '%') ;
+}
+
+static inline bool isTeXone(int ch) {
+ return
+ (ch == '[') || (ch == ']') || (ch == '=') || (ch == '#') ||
+ (ch == '(') || (ch == ')') || (ch == '<') || (ch == '>') ||
+ (ch == '"') ;
+}
+
+static inline bool isTeXtwo(int ch) {
+ return
+ (ch == '{') || (ch == '}') || (ch == '$') ;
+}
+
+static inline bool isTeXthree(int ch) {
+ return
+ (ch == '~') || (ch == '^') || (ch == '_') || (ch == '&') ||
+ (ch == '-') || (ch == '+') || (ch == '\"') || (ch == '`') ||
+ (ch == '/') || (ch == '|') || (ch == '%') ;
+}
+
+static inline bool isTeXfour(int ch) {
+ return
+ (ch == '\\') ;
+}
+
+static inline bool isTeXfive(int ch) {
+ return
+ ((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z')) ||
+ (ch == '@') || (ch == '!') || (ch == '?') ;
+}
+
+static inline bool isTeXsix(int ch) {
+ return
+ (ch == ' ') ;
+}
+
+static inline bool isTeXseven(int ch) {
+ return
+ (ch == '^') ;
+}
+
+// Interface determination
+
+static int CheckTeXInterface(
+ unsigned int startPos,
+ int length,
+ Accessor &styler,
+ int defaultInterface) {
+
+ char lineBuffer[1024] ;
+ unsigned int linePos = 0 ;
+
+ // some day we can make something lexer.tex.mapping=(all,0)(nl,1)(en,2)...
+
+ if (styler.SafeGetCharAt(0) == '%') {
+ for (unsigned int i = 0; i < startPos + length; i++) {
+ lineBuffer[linePos++] = styler.SafeGetCharAt(i) ;
+ if (endOfLine(styler, i) || (linePos >= sizeof(lineBuffer) - 1)) {
+ lineBuffer[linePos] = '\0';
+ if (strstr(lineBuffer, "interface=all")) {
+ return 0 ;
+ } else if (strstr(lineBuffer, "interface=tex")) {
+ return 1 ;
+ } else if (strstr(lineBuffer, "interface=nl")) {
+ return 2 ;
+ } else if (strstr(lineBuffer, "interface=en")) {
+ return 3 ;
+ } else if (strstr(lineBuffer, "interface=de")) {
+ return 4 ;
+ } else if (strstr(lineBuffer, "interface=cz")) {
+ return 5 ;
+ } else if (strstr(lineBuffer, "interface=it")) {
+ return 6 ;
+ } else if (strstr(lineBuffer, "interface=ro")) {
+ return 7 ;
+ } else if (strstr(lineBuffer, "interface=latex")) {
+ // we will move latex cum suis up to 91+ when more keyword lists are supported
+ return 8 ;
+ } else if (styler.SafeGetCharAt(1) == 'D' && strstr(lineBuffer, "%D \\module")) {
+ // better would be to limit the search to just one line
+ return 3 ;
+ } else {
+ return defaultInterface ;
+ }
+ }
+ }
+ }
+
+ return defaultInterface ;
+}
+
+static void ColouriseTeXDoc(
+ unsigned int startPos,
+ int length,
+ int,
+ WordList *keywordlists[],
+ Accessor &styler) {
+
+ styler.StartAt(startPos) ;
+ styler.StartSegment(startPos) ;
+
+ bool processComment = styler.GetPropertyInt("lexer.tex.comment.process", 0) == 1 ;
+ bool useKeywords = styler.GetPropertyInt("lexer.tex.use.keywords", 1) == 1 ;
+ bool autoIf = styler.GetPropertyInt("lexer.tex.auto.if", 1) == 1 ;
+ int defaultInterface = styler.GetPropertyInt("lexer.tex.interface.default", 1) ;
+
+ char key[100] ;
+ int k ;
+ bool newifDone = false ;
+ bool inComment = false ;
+
+ int currentInterface = CheckTeXInterface(startPos,length,styler,defaultInterface) ;
+
+ if (currentInterface == 0) {
+ useKeywords = false ;
+ currentInterface = 1 ;
+ }
+
+ WordList &keywords = *keywordlists[currentInterface-1] ;
+
+ StyleContext sc(startPos, length, SCE_TEX_TEXT, styler);
+
+ bool going = sc.More() ; // needed because of a fuzzy end of file state
+
+ for (; going; sc.Forward()) {
+
+ if (! sc.More()) { going = false ; } // we need to go one behind the end of text
+
+ if (inComment) {
+ if (sc.atLineEnd) {
+ sc.SetState(SCE_TEX_TEXT) ;
+ newifDone = false ;
+ inComment = false ;
+ }
+ } else {
+ if (! isTeXfive(sc.ch)) {
+ if (sc.state == SCE_TEX_COMMAND) {
+ if (sc.LengthCurrent() == 1) { // \<noncstoken>
+ if (isTeXseven(sc.ch) && isTeXseven(sc.chNext)) {
+ sc.Forward(2) ; // \^^ and \^^<token>
+ }
+ sc.ForwardSetState(SCE_TEX_TEXT) ;
+ } else {
+ sc.GetCurrent(key, sizeof(key)-1) ;
+ k = strlen(key) ;
+ memmove(key,key+1,k) ; // shift left over escape token
+ key[k] = '\0' ;
+ k-- ;
+ if (! keywords || ! useKeywords) {
+ sc.SetState(SCE_TEX_COMMAND) ;
+ newifDone = false ;
+ } else if (k == 1) { //\<cstoken>
+ sc.SetState(SCE_TEX_COMMAND) ;
+ newifDone = false ;
+ } else if (keywords.InList(key)) {
+ sc.SetState(SCE_TEX_COMMAND) ;
+ newifDone = autoIf && (strcmp(key,"newif") == 0) ;
+ } else if (autoIf && ! newifDone && (key[0] == 'i') && (key[1] == 'f') && keywords.InList("if")) {
+ sc.SetState(SCE_TEX_COMMAND) ;
+ } else {
+ sc.ChangeState(SCE_TEX_TEXT) ;
+ sc.SetState(SCE_TEX_TEXT) ;
+ newifDone = false ;
+ }
+ }
+ }
+ if (isTeXzero(sc.ch)) {
+ sc.SetState(SCE_TEX_SYMBOL) ;
+ sc.ForwardSetState(SCE_TEX_DEFAULT) ;
+ inComment = ! processComment ;
+ newifDone = false ;
+ } else if (isTeXseven(sc.ch) && isTeXseven(sc.chNext)) {
+ sc.SetState(SCE_TEX_TEXT) ;
+ sc.ForwardSetState(SCE_TEX_TEXT) ;
+ } else if (isTeXone(sc.ch)) {
+ sc.SetState(SCE_TEX_SPECIAL) ;
+ newifDone = false ;
+ } else if (isTeXtwo(sc.ch)) {
+ sc.SetState(SCE_TEX_GROUP) ;
+ newifDone = false ;
+ } else if (isTeXthree(sc.ch)) {
+ sc.SetState(SCE_TEX_SYMBOL) ;
+ newifDone = false ;
+ } else if (isTeXfour(sc.ch)) {
+ sc.SetState(SCE_TEX_COMMAND) ;
+ } else if (isTeXsix(sc.ch)) {
+ sc.SetState(SCE_TEX_TEXT) ;
+ } else if (sc.atLineEnd) {
+ sc.SetState(SCE_TEX_TEXT) ;
+ newifDone = false ;
+ inComment = false ;
+ } else {
+ sc.SetState(SCE_TEX_TEXT) ;
+ }
+ } else if (sc.state != SCE_TEX_COMMAND) {
+ sc.SetState(SCE_TEX_TEXT) ;
+ }
+ }
+ }
+ sc.ChangeState(SCE_TEX_TEXT) ;
+ sc.Complete();
+
+}
+
+
+// Hooks into the system:
+
+static const char * const texWordListDesc[] = {
+ "TeX, eTeX, pdfTeX, Omega",
+ "ConTeXt Dutch",
+ "ConTeXt English",
+ "ConTeXt German",
+ "ConTeXt Czech",
+ "ConTeXt Italian",
+ "ConTeXt Romanian",
+ 0,
+} ;
+
+LexerModule lmTeX(SCLEX_TEX, ColouriseTeXDoc, "tex", 0, texWordListDesc);
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