496 lines
14 KiB
C++
496 lines
14 KiB
C++
// Scintilla source code edit control
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// File: LexTeX.cxx - general context conformant tex coloring scheme
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// Author: Hans Hagen - PRAGMA ADE - Hasselt NL - www.pragma-ade.com
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// Version: September 28, 2003
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// Copyright: 1998-2003 by Neil Hodgson <neilh@scintilla.org>
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// The License.txt file describes the conditions under which this software may be distributed.
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// This lexer is derived from the one written for the texwork environment (1999++) which in
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// turn is inspired on texedit (1991++) which finds its roots in wdt (1986).
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// If you run into strange boundary cases, just tell me and I'll look into it.
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// TeX Folding code added by instanton (soft_share@126.com) with borrowed code from VisualTeX source by Alex Romanenko.
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// Version: June 22, 2007
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <ctype.h>
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#include "ILexer.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "WordList.h"
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#include "LexAccessor.h"
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#include "Accessor.h"
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#include "StyleContext.h"
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#include "CharacterSet.h"
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#include "LexerModule.h"
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using namespace Scintilla;
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// val SCE_TEX_DEFAULT = 0
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// val SCE_TEX_SPECIAL = 1
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// val SCE_TEX_GROUP = 2
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// val SCE_TEX_SYMBOL = 3
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// val SCE_TEX_COMMAND = 4
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// val SCE_TEX_TEXT = 5
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// Definitions in SciTEGlobal.properties:
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//
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// TeX Highlighting
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//
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// # Default
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// style.tex.0=fore:#7F7F00
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// # Special
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// style.tex.1=fore:#007F7F
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// # Group
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// style.tex.2=fore:#880000
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// # Symbol
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// style.tex.3=fore:#7F7F00
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// # Command
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// style.tex.4=fore:#008800
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// # Text
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// style.tex.5=fore:#000000
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// lexer.tex.interface.default=0
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// lexer.tex.comment.process=0
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// todo: lexer.tex.auto.if
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// Auxiliary functions:
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static inline bool endOfLine(Accessor &styler, Sci_PositionU i) {
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return
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(styler[i] == '\n') || ((styler[i] == '\r') && (styler.SafeGetCharAt(i + 1) != '\n')) ;
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}
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static inline bool isTeXzero(int ch) {
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return
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(ch == '%') ;
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}
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static inline bool isTeXone(int ch) {
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return
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(ch == '[') || (ch == ']') || (ch == '=') || (ch == '#') ||
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(ch == '(') || (ch == ')') || (ch == '<') || (ch == '>') ||
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(ch == '"') ;
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}
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static inline bool isTeXtwo(int ch) {
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return
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(ch == '{') || (ch == '}') || (ch == '$') ;
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}
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static inline bool isTeXthree(int ch) {
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return
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(ch == '~') || (ch == '^') || (ch == '_') || (ch == '&') ||
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(ch == '-') || (ch == '+') || (ch == '\"') || (ch == '`') ||
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(ch == '/') || (ch == '|') || (ch == '%') ;
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}
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static inline bool isTeXfour(int ch) {
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return
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(ch == '\\') ;
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}
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static inline bool isTeXfive(int ch) {
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return
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((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z')) ||
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(ch == '@') || (ch == '!') || (ch == '?') ;
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}
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static inline bool isTeXsix(int ch) {
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return
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(ch == ' ') ;
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}
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static inline bool isTeXseven(int ch) {
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return
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(ch == '^') ;
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}
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// Interface determination
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static int CheckTeXInterface(
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Sci_PositionU startPos,
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Sci_Position length,
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Accessor &styler,
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int defaultInterface) {
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char lineBuffer[1024] ;
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Sci_PositionU linePos = 0 ;
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// some day we can make something lexer.tex.mapping=(all,0)(nl,1)(en,2)...
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if (styler.SafeGetCharAt(0) == '%') {
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for (Sci_PositionU i = 0; i < startPos + length; i++) {
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lineBuffer[linePos++] = styler.SafeGetCharAt(i) ;
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if (endOfLine(styler, i) || (linePos >= sizeof(lineBuffer) - 1)) {
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lineBuffer[linePos] = '\0';
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if (strstr(lineBuffer, "interface=all")) {
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return 0 ;
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} else if (strstr(lineBuffer, "interface=tex")) {
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return 1 ;
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} else if (strstr(lineBuffer, "interface=nl")) {
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return 2 ;
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} else if (strstr(lineBuffer, "interface=en")) {
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return 3 ;
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} else if (strstr(lineBuffer, "interface=de")) {
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return 4 ;
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} else if (strstr(lineBuffer, "interface=cz")) {
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return 5 ;
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} else if (strstr(lineBuffer, "interface=it")) {
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return 6 ;
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} else if (strstr(lineBuffer, "interface=ro")) {
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return 7 ;
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} else if (strstr(lineBuffer, "interface=latex")) {
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// we will move latex cum suis up to 91+ when more keyword lists are supported
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return 8 ;
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} else if (styler.SafeGetCharAt(1) == 'D' && strstr(lineBuffer, "%D \\module")) {
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// better would be to limit the search to just one line
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return 3 ;
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} else {
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return defaultInterface ;
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}
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}
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}
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}
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return defaultInterface ;
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}
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static void ColouriseTeXDoc(
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Sci_PositionU startPos,
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Sci_Position length,
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int,
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WordList *keywordlists[],
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Accessor &styler) {
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styler.StartAt(startPos) ;
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styler.StartSegment(startPos) ;
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bool processComment = styler.GetPropertyInt("lexer.tex.comment.process", 0) == 1 ;
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bool useKeywords = styler.GetPropertyInt("lexer.tex.use.keywords", 1) == 1 ;
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bool autoIf = styler.GetPropertyInt("lexer.tex.auto.if", 1) == 1 ;
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int defaultInterface = styler.GetPropertyInt("lexer.tex.interface.default", 1) ;
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char key[100] ;
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int k ;
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bool newifDone = false ;
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bool inComment = false ;
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int currentInterface = CheckTeXInterface(startPos,length,styler,defaultInterface) ;
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if (currentInterface == 0) {
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useKeywords = false ;
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currentInterface = 1 ;
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}
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WordList &keywords = *keywordlists[currentInterface-1] ;
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StyleContext sc(startPos, length, SCE_TEX_TEXT, styler);
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bool going = sc.More() ; // needed because of a fuzzy end of file state
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for (; going; sc.Forward()) {
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if (! sc.More()) { going = false ; } // we need to go one behind the end of text
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if (inComment) {
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if (sc.atLineEnd) {
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sc.SetState(SCE_TEX_TEXT) ;
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newifDone = false ;
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inComment = false ;
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}
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} else {
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if (! isTeXfive(sc.ch)) {
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if (sc.state == SCE_TEX_COMMAND) {
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if (sc.LengthCurrent() == 1) { // \<noncstoken>
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if (isTeXseven(sc.ch) && isTeXseven(sc.chNext)) {
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sc.Forward(2) ; // \^^ and \^^<token>
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}
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sc.ForwardSetState(SCE_TEX_TEXT) ;
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} else {
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sc.GetCurrent(key, sizeof(key)-1) ;
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k = static_cast<int>(strlen(key)) ;
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memmove(key,key+1,k) ; // shift left over escape token
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key[k] = '\0' ;
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k-- ;
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if (! keywords || ! useKeywords) {
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sc.SetState(SCE_TEX_COMMAND) ;
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newifDone = false ;
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} else if (k == 1) { //\<cstoken>
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sc.SetState(SCE_TEX_COMMAND) ;
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newifDone = false ;
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} else if (keywords.InList(key)) {
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sc.SetState(SCE_TEX_COMMAND) ;
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newifDone = autoIf && (strcmp(key,"newif") == 0) ;
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} else if (autoIf && ! newifDone && (key[0] == 'i') && (key[1] == 'f') && keywords.InList("if")) {
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sc.SetState(SCE_TEX_COMMAND) ;
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} else {
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sc.ChangeState(SCE_TEX_TEXT) ;
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sc.SetState(SCE_TEX_TEXT) ;
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newifDone = false ;
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}
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}
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}
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if (isTeXzero(sc.ch)) {
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sc.SetState(SCE_TEX_SYMBOL);
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if (!endOfLine(styler,sc.currentPos + 1))
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sc.ForwardSetState(SCE_TEX_DEFAULT) ;
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inComment = ! processComment ;
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newifDone = false ;
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} else if (isTeXseven(sc.ch) && isTeXseven(sc.chNext)) {
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sc.SetState(SCE_TEX_TEXT) ;
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sc.ForwardSetState(SCE_TEX_TEXT) ;
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} else if (isTeXone(sc.ch)) {
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sc.SetState(SCE_TEX_SPECIAL) ;
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newifDone = false ;
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} else if (isTeXtwo(sc.ch)) {
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sc.SetState(SCE_TEX_GROUP) ;
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newifDone = false ;
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} else if (isTeXthree(sc.ch)) {
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sc.SetState(SCE_TEX_SYMBOL) ;
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newifDone = false ;
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} else if (isTeXfour(sc.ch)) {
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sc.SetState(SCE_TEX_COMMAND) ;
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} else if (isTeXsix(sc.ch)) {
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sc.SetState(SCE_TEX_TEXT) ;
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} else if (sc.atLineEnd) {
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sc.SetState(SCE_TEX_TEXT) ;
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newifDone = false ;
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inComment = false ;
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} else {
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sc.SetState(SCE_TEX_TEXT) ;
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}
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} else if (sc.state != SCE_TEX_COMMAND) {
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sc.SetState(SCE_TEX_TEXT) ;
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}
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}
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}
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sc.ChangeState(SCE_TEX_TEXT) ;
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sc.Complete();
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}
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static inline bool isNumber(int ch) {
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return
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(ch == '0') || (ch == '1') || (ch == '2') ||
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(ch == '3') || (ch == '4') || (ch == '5') ||
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(ch == '6') || (ch == '7') || (ch == '8') || (ch == '9');
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}
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static inline bool isWordChar(int ch) {
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return ((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z'));
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}
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static Sci_Position ParseTeXCommand(Sci_PositionU pos, Accessor &styler, char *command)
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{
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Sci_Position length=0;
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char ch=styler.SafeGetCharAt(pos+1);
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if(ch==',' || ch==':' || ch==';' || ch=='%'){
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command[0]=ch;
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command[1]=0;
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return 1;
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}
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// find end
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while(isWordChar(ch) && !isNumber(ch) && ch!='_' && ch!='.' && length<100){
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command[length]=ch;
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length++;
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ch=styler.SafeGetCharAt(pos+length+1);
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}
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command[length]='\0';
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if(!length) return 0;
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return length+1;
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}
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static int classifyFoldPointTeXPaired(const char* s) {
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int lev=0;
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if (!(isdigit(s[0]) || (s[0] == '.'))){
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if (strcmp(s, "begin")==0||strcmp(s,"FoldStart")==0||
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strcmp(s,"abstract")==0||strcmp(s,"unprotect")==0||
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strcmp(s,"title")==0||strncmp(s,"start",5)==0||strncmp(s,"Start",5)==0||
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strcmp(s,"documentclass")==0||strncmp(s,"if",2)==0
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)
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lev=1;
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if (strcmp(s, "end")==0||strcmp(s,"FoldStop")==0||
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strcmp(s,"maketitle")==0||strcmp(s,"protect")==0||
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strncmp(s,"stop",4)==0||strncmp(s,"Stop",4)==0||
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strcmp(s,"fi")==0
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)
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lev=-1;
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}
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return lev;
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}
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static int classifyFoldPointTeXUnpaired(const char* s) {
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int lev=0;
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if (!(isdigit(s[0]) || (s[0] == '.'))){
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if (strcmp(s,"part")==0||
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strcmp(s,"chapter")==0||
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strcmp(s,"section")==0||
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strcmp(s,"subsection")==0||
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strcmp(s,"subsubsection")==0||
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strcmp(s,"CJKfamily")==0||
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strcmp(s,"appendix")==0||
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strcmp(s,"Topic")==0||strcmp(s,"topic")==0||
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strcmp(s,"subject")==0||strcmp(s,"subsubject")==0||
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strcmp(s,"def")==0||strcmp(s,"gdef")==0||strcmp(s,"edef")==0||
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strcmp(s,"xdef")==0||strcmp(s,"framed")==0||
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strcmp(s,"frame")==0||
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strcmp(s,"foilhead")==0||strcmp(s,"overlays")==0||strcmp(s,"slide")==0
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){
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lev=1;
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}
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}
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return lev;
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}
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static bool IsTeXCommentLine(Sci_Position line, Accessor &styler) {
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Sci_Position pos = styler.LineStart(line);
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Sci_Position eol_pos = styler.LineStart(line + 1) - 1;
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Sci_Position startpos = pos;
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while (startpos<eol_pos){
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char ch = styler[startpos];
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if (ch!='%' && ch!=' ') return false;
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else if (ch=='%') return true;
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startpos++;
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}
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return false;
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}
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// FoldTeXDoc: borrowed from VisualTeX with modifications
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static void FoldTexDoc(Sci_PositionU startPos, Sci_Position length, int, WordList *[], Accessor &styler)
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{
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bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
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Sci_PositionU endPos = startPos+length;
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int visibleChars=0;
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Sci_Position lineCurrent=styler.GetLine(startPos);
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int levelPrev=styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
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int levelCurrent=levelPrev;
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char chNext=styler[startPos];
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char buffer[100]="";
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for (Sci_PositionU i=startPos; i < endPos; i++) {
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char ch=chNext;
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chNext=styler.SafeGetCharAt(i+1);
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bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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if(ch=='\\') {
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ParseTeXCommand(i, styler, buffer);
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levelCurrent += classifyFoldPointTeXPaired(buffer)+classifyFoldPointTeXUnpaired(buffer);
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}
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if (levelCurrent > SC_FOLDLEVELBASE && ((ch == '\r' || ch=='\n') && (chNext == '\\'))) {
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ParseTeXCommand(i+1, styler, buffer);
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levelCurrent -= classifyFoldPointTeXUnpaired(buffer);
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}
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char chNext2;
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char chNext3;
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char chNext4;
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char chNext5;
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chNext2=styler.SafeGetCharAt(i+2);
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chNext3=styler.SafeGetCharAt(i+3);
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chNext4=styler.SafeGetCharAt(i+4);
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chNext5=styler.SafeGetCharAt(i+5);
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bool atEOfold = (ch == '%') &&
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(chNext == '%') && (chNext2=='}') &&
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(chNext3=='}')&& (chNext4=='-')&& (chNext5=='-');
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bool atBOfold = (ch == '%') &&
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(chNext == '%') && (chNext2=='-') &&
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(chNext3=='-')&& (chNext4=='{')&& (chNext5=='{');
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if(atBOfold){
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levelCurrent+=1;
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}
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if(atEOfold){
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levelCurrent-=1;
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}
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if(ch=='\\' && chNext=='['){
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levelCurrent+=1;
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}
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if(ch=='\\' && chNext==']'){
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levelCurrent-=1;
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}
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bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
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if (foldComment && atEOL && IsTeXCommentLine(lineCurrent, styler))
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{
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if (lineCurrent==0 && IsTeXCommentLine(lineCurrent + 1, styler)
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)
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levelCurrent++;
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else if (lineCurrent!=0 && !IsTeXCommentLine(lineCurrent - 1, styler)
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&& IsTeXCommentLine(lineCurrent + 1, styler)
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)
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levelCurrent++;
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else if (lineCurrent!=0 && IsTeXCommentLine(lineCurrent - 1, styler) &&
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!IsTeXCommentLine(lineCurrent+1, styler))
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levelCurrent--;
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}
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//---------------------------------------------------------------------------------------------
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if (atEOL) {
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int lev = levelPrev;
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if (visibleChars == 0 && foldCompact)
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lev |= SC_FOLDLEVELWHITEFLAG;
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if ((levelCurrent > levelPrev) && (visibleChars > 0))
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lev |= SC_FOLDLEVELHEADERFLAG;
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if (lev != styler.LevelAt(lineCurrent)) {
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styler.SetLevel(lineCurrent, lev);
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}
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lineCurrent++;
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levelPrev = levelCurrent;
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visibleChars = 0;
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}
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if (!isspacechar(ch))
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visibleChars++;
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}
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// Fill in the real level of the next line, keeping the current flags as they will be filled in later
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int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
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styler.SetLevel(lineCurrent, levelPrev | flagsNext);
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}
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static const char * const texWordListDesc[] = {
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"TeX, eTeX, pdfTeX, Omega",
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"ConTeXt Dutch",
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"ConTeXt English",
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"ConTeXt German",
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"ConTeXt Czech",
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"ConTeXt Italian",
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"ConTeXt Romanian",
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0,
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} ;
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LexerModule lmTeX(SCLEX_TEX, ColouriseTeXDoc, "tex", FoldTexDoc, texWordListDesc);
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