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405 lines
11 KiB
405 lines
11 KiB
// Scintilla source code edit control
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// @file LexMetapost.cxx - general context conformant metapost 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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// Modified by instanton: July 10, 2007
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// Folding based on keywordlists[]
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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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#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 <string>
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#include <string_view>
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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 Lexilla;
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// val SCE_METAPOST_DEFAULT = 0
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// val SCE_METAPOST_SPECIAL = 1
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// val SCE_METAPOST_GROUP = 2
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// val SCE_METAPOST_SYMBOL = 3
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// val SCE_METAPOST_COMMAND = 4
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// val SCE_METAPOST_TEXT = 5
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// Definitions in SciTEGlobal.properties:
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//
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// Metapost Highlighting
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//
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// # Default
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// style.metapost.0=fore:#7F7F00
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// # Special
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// style.metapost.1=fore:#007F7F
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// # Group
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// style.metapost.2=fore:#880000
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// # Symbol
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// style.metapost.3=fore:#7F7F00
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// # Command
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// style.metapost.4=fore:#008800
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// # Text
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// style.metapost.5=fore:#000000
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// lexer.tex.comment.process=0
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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 isMETAPOSTcomment(int ch) {
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return
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(ch == '%') ;
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}
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static inline bool isMETAPOSTone(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 == '\'') || (ch == '\"') ;
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}
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static inline bool isMETAPOSTtwo(int ch) {
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return
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(ch == ';') || (ch == '$') || (ch == '@') || (ch == '#');
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}
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static inline bool isMETAPOSTthree(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 == '^') || (ch == '&') ||
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(ch == '%') ;
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}
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static inline bool isMETAPOSTidentifier(int ch) {
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return
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((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z')) ||
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(ch == '_') ;
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}
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static inline bool isMETAPOSTnumber(int ch) {
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return
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(ch >= '0') && (ch <= '9') ;
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}
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static inline bool isMETAPOSTstring(int ch) {
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return
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(ch == '\"') ;
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}
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static inline bool isMETAPOSTcolon(int ch) {
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return
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(ch == ':') ;
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}
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static inline bool isMETAPOSTequal(int ch) {
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return
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(ch == '=') ;
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}
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static int CheckMETAPOSTInterface(
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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.metapost.mapping=(none,0)(metapost,1)(mp,1)(metafun,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=none")) {
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return 0 ;
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} else if (strstr(lineBuffer, "interface=metapost") || strstr(lineBuffer, "interface=mp")) {
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return 1 ;
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} else if (strstr(lineBuffer, "interface=metafun")) {
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return 2 ;
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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 2 ;
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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 ColouriseMETAPOSTDoc(
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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.metapost.comment.process", 0) == 1 ;
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int defaultInterface = styler.GetPropertyInt("lexer.metapost.interface.default", 1) ;
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int currentInterface = CheckMETAPOSTInterface(startPos,length,styler,defaultInterface) ;
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// 0 no keyword highlighting
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// 1 metapost keyword hightlighting
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// 2+ metafun keyword hightlighting
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int extraInterface = 0 ;
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if (currentInterface != 0) {
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extraInterface = currentInterface ;
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}
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WordList &keywords = *keywordlists[0] ;
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WordList kwEmpty;
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WordList &keywords2 = (extraInterface > 0) ? *keywordlists[extraInterface - 1] : kwEmpty;
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StyleContext sc(startPos, length, SCE_METAPOST_TEXT, styler) ;
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char key[100] ;
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bool inTeX = false ;
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bool inComment = false ;
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bool inString = false ;
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bool inClause = false ;
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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 (inClause) {
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sc.SetState(SCE_METAPOST_TEXT) ;
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inClause = false ;
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}
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if (inComment) {
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if (sc.atLineEnd) {
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sc.SetState(SCE_METAPOST_TEXT) ;
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inTeX = false ;
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inComment = false ;
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inClause = false ;
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inString = false ; // not correct but we want to stimulate one-lines
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}
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} else if (inString) {
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if (isMETAPOSTstring(sc.ch)) {
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sc.SetState(SCE_METAPOST_SPECIAL) ;
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sc.ForwardSetState(SCE_METAPOST_TEXT) ;
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inString = false ;
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} else if (sc.atLineEnd) {
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sc.SetState(SCE_METAPOST_TEXT) ;
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inTeX = false ;
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inComment = false ;
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inClause = false ;
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inString = false ; // not correct but we want to stimulate one-lines
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}
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} else {
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if ((! isMETAPOSTidentifier(sc.ch)) && (sc.LengthCurrent() > 0)) {
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if (sc.state == SCE_METAPOST_COMMAND) {
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sc.GetCurrent(key, sizeof(key)) ;
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if ((strcmp(key,"btex") == 0) || (strcmp(key,"verbatimtex") == 0)) {
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sc.ChangeState(SCE_METAPOST_GROUP) ;
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inTeX = true ;
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} else if (inTeX) {
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if (strcmp(key,"etex") == 0) {
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sc.ChangeState(SCE_METAPOST_GROUP) ;
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inTeX = false ;
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} else {
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sc.ChangeState(SCE_METAPOST_TEXT) ;
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}
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} else {
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if (keywords && keywords.InList(key)) {
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sc.ChangeState(SCE_METAPOST_COMMAND) ;
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} else if (keywords2 && keywords2.InList(key)) {
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sc.ChangeState(SCE_METAPOST_EXTRA) ;
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} else {
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sc.ChangeState(SCE_METAPOST_TEXT) ;
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}
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}
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}
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}
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if (isMETAPOSTcomment(sc.ch)) {
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if (! inTeX) {
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sc.SetState(SCE_METAPOST_SYMBOL) ;
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sc.ForwardSetState(SCE_METAPOST_DEFAULT) ;
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inComment = ! processComment ;
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} else {
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sc.SetState(SCE_METAPOST_TEXT) ;
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}
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} else if (isMETAPOSTstring(sc.ch)) {
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if (! inTeX) {
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sc.SetState(SCE_METAPOST_SPECIAL) ;
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if (! isMETAPOSTstring(sc.chNext)) {
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sc.ForwardSetState(SCE_METAPOST_TEXT) ;
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}
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inString = true ;
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} else {
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sc.SetState(SCE_METAPOST_TEXT) ;
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}
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} else if (isMETAPOSTcolon(sc.ch)) {
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if (! inTeX) {
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if (! isMETAPOSTequal(sc.chNext)) {
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sc.SetState(SCE_METAPOST_COMMAND) ;
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inClause = true ;
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} else {
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sc.SetState(SCE_METAPOST_SPECIAL) ;
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}
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} else {
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sc.SetState(SCE_METAPOST_TEXT) ;
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}
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} else if (isMETAPOSTone(sc.ch)) {
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if (! inTeX) {
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sc.SetState(SCE_METAPOST_SPECIAL) ;
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} else {
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sc.SetState(SCE_METAPOST_TEXT) ;
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}
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} else if (isMETAPOSTtwo(sc.ch)) {
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if (! inTeX) {
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sc.SetState(SCE_METAPOST_GROUP) ;
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} else {
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sc.SetState(SCE_METAPOST_TEXT) ;
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}
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} else if (isMETAPOSTthree(sc.ch)) {
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if (! inTeX) {
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sc.SetState(SCE_METAPOST_SYMBOL) ;
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} else {
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sc.SetState(SCE_METAPOST_TEXT) ;
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}
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} else if (isMETAPOSTidentifier(sc.ch)) {
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if (sc.state != SCE_METAPOST_COMMAND) {
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sc.SetState(SCE_METAPOST_TEXT) ;
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sc.ChangeState(SCE_METAPOST_COMMAND) ;
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}
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} else if (isMETAPOSTnumber(sc.ch)) {
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// rather redundant since for the moment we don't handle numbers
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sc.SetState(SCE_METAPOST_TEXT) ;
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} else if (sc.atLineEnd) {
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sc.SetState(SCE_METAPOST_TEXT) ;
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inTeX = false ;
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inComment = false ;
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inClause = false ;
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inString = false ;
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} else {
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sc.SetState(SCE_METAPOST_TEXT) ;
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}
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}
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}
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sc.Complete();
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}
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// Hooks info the system:
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static const char * const metapostWordListDesc[] = {
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"MetaPost",
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"MetaFun",
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0
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} ;
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static int classifyFoldPointMetapost(const char* s,WordList *keywordlists[]) {
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WordList& keywordsStart=*keywordlists[3];
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WordList& keywordsStop1=*keywordlists[4];
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if (keywordsStart.InList(s)) {return 1;}
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else if (keywordsStop1.InList(s)) {return -1;}
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return 0;
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}
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static int ParseMetapostWord(Sci_PositionU pos, Accessor &styler, char *word)
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{
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int length=0;
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char ch=styler.SafeGetCharAt(pos);
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*word=0;
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while(isMETAPOSTidentifier(ch) && isalpha(ch) && length<100){
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word[length]=ch;
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length++;
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ch=styler.SafeGetCharAt(pos+length);
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}
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word[length]=0;
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return length;
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}
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static void FoldMetapostDoc(Sci_PositionU startPos, Sci_Position length, int, WordList *keywordlists[], 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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char chPrev=styler.SafeGetCharAt(i-1);
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bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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if(i==0 || chPrev == '\r' || chPrev=='\n'|| chPrev==' '|| chPrev=='(' || chPrev=='$')
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{
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ParseMetapostWord(i, styler, buffer);
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levelCurrent += classifyFoldPointMetapost(buffer,keywordlists);
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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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LexerModule lmMETAPOST(SCLEX_METAPOST, ColouriseMETAPOSTDoc, "metapost", FoldMetapostDoc, metapostWordListDesc);
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