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LexTeX.cxx
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LexTeX.cxx
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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);