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// Scintilla source code edit control
/** @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
**/
// 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"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
static bool IsMatlabCommentChar(int c) {
return (c == '%') ;
}
static bool IsOctaveCommentChar(int c) {
return (c == '%' || c == '#') ;
}
static bool IsMatlabComment(Accessor &styler, int pos, int len) {
return len > 0 && IsMatlabCommentChar(styler[pos]) ;
}
static bool IsOctaveComment(Accessor &styler, int pos, int len) {
return len > 0 && IsOctaveCommentChar(styler[pos]) ;
}
static void ColouriseMatlabOctaveDoc(
unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler,
bool (*IsCommentChar)(int)) {
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;
// 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
int 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.GetCurrentLowered(s, sizeof(s));
if (keywords.InList(s)) {
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) {
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)
{
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)
commentDepth ++;
curLine = styler.GetLine(sc.currentPos);
styler.SetLineState(curLine, commentDepth);
sc.SetState(SCE_MATLAB_COMMENT);
} else if (sc.ch == '!' && sc.chNext != '=' ) {
sc.SetState(SCE_MATLAB_COMMAND);
} 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 == ']') {
transpose = true;
} else {
transpose = false;
}
sc.SetState(SCE_MATLAB_OPERATOR);
} else {
transpose = false;
}
}
}
sc.Complete();
}
static void ColouriseMatlabDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
ColouriseMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsMatlabCommentChar);
}
static void ColouriseOctaveDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
ColouriseMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsOctaveCommentChar);
}
static void FoldMatlabOctaveDoc(unsigned int startPos, int length, int,
WordList *[], Accessor &styler,
bool (*IsComment)(Accessor&, int, int)) {
int endPos = startPos + length;
// Backtrack to previous line in case need to fix its fold status
int lineCurrent = styler.GetLine(startPos);
if (startPos > 0) {
if (lineCurrent > 0) {
lineCurrent--;
startPos = styler.LineStart(lineCurrent);
}
}
int spaceFlags = 0;
int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, IsComment);
char chNext = styler[startPos];
for (int i = startPos; i < endPos; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
if ((ch == '\r' && chNext != '\n') || (ch == '\n') || (i == endPos)) {
int lev = indentCurrent;
int indentNext = styler.IndentAmount(lineCurrent + 1, &spaceFlags, IsComment);
if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
// Only non whitespace lines can be headers
if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK)) {
lev |= SC_FOLDLEVELHEADERFLAG;
} else if (indentNext & SC_FOLDLEVELWHITEFLAG) {
// Line after is blank so check the next - maybe should continue further?
int spaceFlags2 = 0;
int indentNext2 = styler.IndentAmount(lineCurrent + 2, &spaceFlags2, IsComment);
if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext2 & SC_FOLDLEVELNUMBERMASK)) {
lev |= SC_FOLDLEVELHEADERFLAG;
}
}
}
indentCurrent = indentNext;
styler.SetLevel(lineCurrent, lev);
lineCurrent++;
}
}
}
static void FoldMatlabDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
FoldMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsMatlabComment);
}
static void FoldOctaveDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler) {
FoldMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsOctaveComment);
}
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);

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