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-// Scintilla source code edit control
-// Encoding: UTF-8
-/** @file LexMatlab.cxx
- ** Lexer for Matlab.
- ** Written by José Fonseca
- **
- ** Changes by Christoph Dalitz 2003/12/04:
- ** - added support for Octave
- ** - Strings can now be included both in single or double quotes
- **
- ** Changes by John Donoghue 2012/04/02
- ** - added block comment (and nested block comments)
- ** - added ... displayed as a comment
- ** - removed unused IsAWord functions
- ** - added some comments
- **
- ** Changes by John Donoghue 2014/08/01
- ** - fix allowed transpose ' after {} operator
- **
- ** Changes by John Donoghue 2016/11/15
- ** - update matlab code folding
- **
- ** Changes by John Donoghue 2017/01/18
- ** - update matlab block comment detection
- **/
-// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
-// The License.txt file describes the conditions under which this software may be distributed.
-
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <assert.h>
-#include <ctype.h>
-
-#include "ILexer.h"
-#include "Scintilla.h"
-#include "SciLexer.h"
-
-#include "WordList.h"
-#include "LexAccessor.h"
-#include "Accessor.h"
-#include "StyleContext.h"
-#include "CharacterSet.h"
-#include "LexerModule.h"
-
-using namespace Scintilla;
-
-static bool IsMatlabCommentChar(int c) {
- return (c == '%') ;
-}
-
-static bool IsOctaveCommentChar(int c) {
- return (c == '%' || c == '#') ;
-}
-
-static inline int LowerCase(int c) {
- if (c >= 'A' && c <= 'Z')
- return 'a' + c - 'A';
- return c;
-}
-
-static int CheckKeywordFoldPoint(char *str) {
- if (strcmp ("if", str) == 0 ||
- strcmp ("for", str) == 0 ||
- strcmp ("switch", str) == 0 ||
- strcmp ("while", str) == 0 ||
- strcmp ("try", str) == 0 ||
- strcmp ("do", str) == 0 ||
- strcmp ("parfor", str) == 0 ||
- strcmp ("function", str) == 0)
- return 1;
- if (strncmp("end", str, 3) == 0 ||
- strcmp("until", str) == 0)
- return -1;
- return 0;
-}
-
-static bool IsSpaceToEOL(Sci_Position startPos, Accessor &styler) {
- Sci_Position line = styler.GetLine(startPos);
- Sci_Position eol_pos = styler.LineStart(line + 1) - 1;
- for (Sci_Position i = startPos; i < eol_pos; i++) {
- char ch = styler[i];
- if(!IsASpace(ch)) return false;
- }
- return true;
-}
-
-static void ColouriseMatlabOctaveDoc(
- Sci_PositionU startPos, Sci_Position length, int initStyle,
- WordList *keywordlists[], Accessor &styler,
- bool (*IsCommentChar)(int),
- bool ismatlab) {
-
- WordList &keywords = *keywordlists[0];
-
- styler.StartAt(startPos);
-
- // boolean for when the ' is allowed to be transpose vs the start/end
- // of a string
- bool transpose = false;
-
- // count of brackets as boolean for when end could be an operator not a keyword
- int allow_end_op = 0;
-
- // approximate position of first non space character in a line
- int nonSpaceColumn = -1;
- // approximate column position of the current character in a line
- int column = 0;
-
- // use the line state of each line to store the block comment depth
- Sci_Position curLine = styler.GetLine(startPos);
- int commentDepth = curLine > 0 ? styler.GetLineState(curLine-1) : 0;
-
-
- StyleContext sc(startPos, length, initStyle, styler);
-
- for (; sc.More(); sc.Forward(), column++) {
-
- if(sc.atLineStart) {
- // set the line state to the current commentDepth
- curLine = styler.GetLine(sc.currentPos);
- styler.SetLineState(curLine, commentDepth);
-
- // reset the column to 0, nonSpace to -1 (not set)
- column = 0;
- nonSpaceColumn = -1;
- }
-
- // save the column position of first non space character in a line
- if((nonSpaceColumn == -1) && (! IsASpace(sc.ch)))
- {
- nonSpaceColumn = column;
- }
-
- // check for end of states
- if (sc.state == SCE_MATLAB_OPERATOR) {
- if (sc.chPrev == '.') {
- if (sc.ch == '*' || sc.ch == '/' || sc.ch == '\\' || sc.ch == '^') {
- sc.ForwardSetState(SCE_MATLAB_DEFAULT);
- transpose = false;
- } else if (sc.ch == '\'') {
- sc.ForwardSetState(SCE_MATLAB_DEFAULT);
- transpose = true;
- } else if(sc.ch == '.' && sc.chNext == '.') {
- // we werent an operator, but a '...'
- sc.ChangeState(SCE_MATLAB_COMMENT);
- transpose = false;
- } else {
- sc.SetState(SCE_MATLAB_DEFAULT);
- }
- } else {
- sc.SetState(SCE_MATLAB_DEFAULT);
- }
- } else if (sc.state == SCE_MATLAB_KEYWORD) {
- if (!isalnum(sc.ch) && sc.ch != '_') {
- char s[100];
- sc.GetCurrent(s, sizeof(s));
-
- if (keywords.InList(s)) {
- if (strcmp ("end", s) == 0 && allow_end_op) {
- sc.ChangeState(SCE_MATLAB_NUMBER);
- }
- sc.SetState(SCE_MATLAB_DEFAULT);
- transpose = false;
- } else {
- sc.ChangeState(SCE_MATLAB_IDENTIFIER);
- sc.SetState(SCE_MATLAB_DEFAULT);
- transpose = true;
- }
- }
- } else if (sc.state == SCE_MATLAB_NUMBER) {
- if (!isdigit(sc.ch) && sc.ch != '.'
- && !(sc.ch == 'e' || sc.ch == 'E')
- && !((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E'))) {
- sc.SetState(SCE_MATLAB_DEFAULT);
- transpose = true;
- }
- } else if (sc.state == SCE_MATLAB_STRING) {
- if (sc.ch == '\'') {
- if (sc.chNext == '\'') {
- sc.Forward();
- } else {
- sc.ForwardSetState(SCE_MATLAB_DEFAULT);
- }
- }
- } else if (sc.state == SCE_MATLAB_DOUBLEQUOTESTRING) {
- if (sc.ch == '\\') {
- if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
- sc.Forward();
- }
- } else if (sc.ch == '\"') {
- sc.ForwardSetState(SCE_MATLAB_DEFAULT);
- }
- } else if (sc.state == SCE_MATLAB_COMMAND) {
- if (sc.atLineEnd) {
- sc.SetState(SCE_MATLAB_DEFAULT);
- transpose = false;
- }
- } else if (sc.state == SCE_MATLAB_COMMENT) {
- // end or start of a nested a block comment?
- if( IsCommentChar(sc.ch) && sc.chNext == '}' && nonSpaceColumn == column && IsSpaceToEOL(sc.currentPos+2, styler)) {
- if(commentDepth > 0) commentDepth --;
-
- curLine = styler.GetLine(sc.currentPos);
- styler.SetLineState(curLine, commentDepth);
- sc.Forward();
-
- if (commentDepth == 0) {
- sc.ForwardSetState(SCE_D_DEFAULT);
- transpose = false;
- }
- }
- else if( IsCommentChar(sc.ch) && sc.chNext == '{' && nonSpaceColumn == column && IsSpaceToEOL(sc.currentPos+2, styler))
- {
- commentDepth ++;
-
- curLine = styler.GetLine(sc.currentPos);
- styler.SetLineState(curLine, commentDepth);
- sc.Forward();
- transpose = false;
-
- } else if(commentDepth == 0) {
- // single line comment
- if (sc.atLineEnd || sc.ch == '\r' || sc.ch == '\n') {
- sc.SetState(SCE_MATLAB_DEFAULT);
- transpose = false;
- }
- }
- }
-
- // check start of a new state
- if (sc.state == SCE_MATLAB_DEFAULT) {
- if (IsCommentChar(sc.ch)) {
- // ncrement depth if we are a block comment
- if(sc.chNext == '{' && nonSpaceColumn == column) {
- if(IsSpaceToEOL(sc.currentPos+2, styler)) {
- commentDepth ++;
- }
- }
- curLine = styler.GetLine(sc.currentPos);
- styler.SetLineState(curLine, commentDepth);
- sc.SetState(SCE_MATLAB_COMMENT);
- } else if (sc.ch == '!' && sc.chNext != '=' ) {
- if(ismatlab) {
- sc.SetState(SCE_MATLAB_COMMAND);
- } else {
- sc.SetState(SCE_MATLAB_OPERATOR);
- }
- } else if (sc.ch == '\'') {
- if (transpose) {
- sc.SetState(SCE_MATLAB_OPERATOR);
- } else {
- sc.SetState(SCE_MATLAB_STRING);
- }
- } else if (sc.ch == '"') {
- sc.SetState(SCE_MATLAB_DOUBLEQUOTESTRING);
- } else if (isdigit(sc.ch) || (sc.ch == '.' && isdigit(sc.chNext))) {
- sc.SetState(SCE_MATLAB_NUMBER);
- } else if (isalpha(sc.ch)) {
- sc.SetState(SCE_MATLAB_KEYWORD);
- } else if (isoperator(static_cast<char>(sc.ch)) || sc.ch == '@' || sc.ch == '\\') {
- if (sc.ch == '(' || sc.ch == '[' || sc.ch == '{') {
- allow_end_op ++;
- } else if ((sc.ch == ')' || sc.ch == ']' || sc.ch == '}') && (allow_end_op > 0)) {
- allow_end_op --;
- }
-
- if (sc.ch == ')' || sc.ch == ']' || sc.ch == '}') {
- transpose = true;
- } else {
- transpose = false;
- }
- sc.SetState(SCE_MATLAB_OPERATOR);
- } else {
- transpose = false;
- }
- }
- }
- sc.Complete();
-}
-
-static void ColouriseMatlabDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
- WordList *keywordlists[], Accessor &styler) {
- ColouriseMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsMatlabCommentChar, true);
-}
-
-static void ColouriseOctaveDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
- WordList *keywordlists[], Accessor &styler) {
- ColouriseMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsOctaveCommentChar, false);
-}
-
-static void FoldMatlabOctaveDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
- WordList *[], Accessor &styler,
- bool (*IsComment)(int ch)) {
-
- if (styler.GetPropertyInt("fold") == 0)
- return;
-
- const bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
- const bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
-
- Sci_PositionU endPos = startPos + length;
- int visibleChars = 0;
- Sci_Position lineCurrent = styler.GetLine(startPos);
- int levelCurrent = SC_FOLDLEVELBASE;
- if (lineCurrent > 0)
- levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
- int levelNext = levelCurrent;
- char chNext = styler[startPos];
- int styleNext = styler.StyleAt(startPos);
- int style = initStyle;
- char word[100];
- int wordlen = 0;
- for (Sci_PositionU i = startPos; i < endPos; i++) {
- char ch = chNext;
- chNext = styler.SafeGetCharAt(i + 1);
- style = styleNext;
- styleNext = styler.StyleAt(i + 1);
- bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
-
- // a line that starts with a comment
- if (foldComment && style == SCE_MATLAB_COMMENT && IsComment(ch) && visibleChars == 0) {
- // start/end of block comment
- if (chNext == '{' && IsSpaceToEOL(i+2, styler))
- levelNext ++;
- if (chNext == '}' && IsSpaceToEOL(i+2, styler))
- levelNext --;
- }
- // keyword
- if(style == SCE_MATLAB_KEYWORD) {
- word[wordlen++] = static_cast<char>(LowerCase(ch));
- if (wordlen == 100) { // prevent overflow
- word[0] = '\0';
- wordlen = 1;
- }
- if (styleNext != SCE_MATLAB_KEYWORD) {
- word[wordlen] = '\0';
- wordlen = 0;
-
- levelNext += CheckKeywordFoldPoint(word);
- }
- }
- if (!IsASpace(ch))
- visibleChars++;
- if (atEOL || (i == endPos-1)) {
- int levelUse = levelCurrent;
- int lev = levelUse | levelNext << 16;
- if (visibleChars == 0 && foldCompact)
- lev |= SC_FOLDLEVELWHITEFLAG;
- if (levelUse < levelNext)
- lev |= SC_FOLDLEVELHEADERFLAG;
- if (lev != styler.LevelAt(lineCurrent)) {
- styler.SetLevel(lineCurrent, lev);
- }
- lineCurrent++;
- levelCurrent = levelNext;
- if (atEOL && (i == static_cast<Sci_PositionU>(styler.Length() - 1))) {
- // There is an empty line at end of file so give it same level and empty
- styler.SetLevel(lineCurrent, (levelCurrent | levelCurrent << 16) | SC_FOLDLEVELWHITEFLAG);
- }
- visibleChars = 0;
- }
- }
-}
-
-static void FoldMatlabDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
- WordList *keywordlists[], Accessor &styler) {
- FoldMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsMatlabCommentChar);
-}
-
-static void FoldOctaveDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
- WordList *keywordlists[], Accessor &styler) {
- FoldMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsOctaveCommentChar);
-}
-
-static const char * const matlabWordListDesc[] = {
- "Keywords",
- 0
-};
-
-static const char * const octaveWordListDesc[] = {
- "Keywords",
- 0
-};
-
-LexerModule lmMatlab(SCLEX_MATLAB, ColouriseMatlabDoc, "matlab", FoldMatlabDoc, matlabWordListDesc);
-
-LexerModule lmOctave(SCLEX_OCTAVE, ColouriseOctaveDoc, "octave", FoldOctaveDoc, octaveWordListDesc);
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 05:13:35 +0000