529 lines
18 KiB
C++
529 lines
18 KiB
C++
// Scintilla source code edit control
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// Encoding: UTF-8
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/** @file LexMatlab.cxx
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** Lexer for Matlab.
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** Written by José Fonseca
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**
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** Changes by Christoph Dalitz 2003/12/04:
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** - added support for Octave
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** - Strings can now be included both in single or double quotes
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**
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** Changes by John Donoghue 2012/04/02
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** - added block comment (and nested block comments)
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** - added ... displayed as a comment
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** - removed unused IsAWord functions
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** - added some comments
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**
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** Changes by John Donoghue 2014/08/01
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** - fix allowed transpose ' after {} operator
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**
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** Changes by John Donoghue 2016/11/15
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** - update matlab code folding
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**
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** Changes by John Donoghue 2017/01/18
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** - update matlab block comment detection
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**
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** Changes by Andrey Smolyakov 2022/04/15
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** - add support for "arguments" block and class definition syntax
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**/
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// Copyright 1998-2001 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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#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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static bool IsMatlabCommentChar(int c) {
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return (c == '%') ;
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}
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static bool IsOctaveCommentChar(int c) {
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return (c == '%' || c == '#') ;
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}
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static inline int LowerCase(int c) {
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if (c >= 'A' && c <= 'Z')
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return 'a' + c - 'A';
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return c;
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}
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static int CheckKeywordFoldPoint(char *str) {
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if (strcmp ("if", str) == 0 ||
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strcmp ("for", str) == 0 ||
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strcmp ("switch", str) == 0 ||
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strcmp ("while", str) == 0 ||
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strcmp ("try", str) == 0 ||
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strcmp ("do", str) == 0 ||
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strcmp ("parfor", str) == 0 ||
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strcmp ("classdef", str) == 0 ||
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strcmp ("spmd", str) == 0 ||
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strcmp ("arguments", str) == 0 ||
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strcmp ("methods", str) == 0 ||
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strcmp ("properties", str) == 0 ||
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strcmp ("events", str) == 0 ||
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strcmp ("function", str) == 0)
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return 1;
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if (strncmp("end", str, 3) == 0 ||
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strcmp("until", str) == 0)
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return -1;
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return 0;
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}
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static bool IsSpaceToEOL(Sci_Position startPos, Accessor &styler) {
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Sci_Position line = styler.GetLine(startPos);
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Sci_Position eol_pos = styler.LineStart(line + 1) - 1;
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for (Sci_Position i = startPos; i < eol_pos; i++) {
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char ch = styler[i];
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if(!IsASpace(ch)) return false;
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}
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return true;
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}
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#define MATLAB_STATE_FOLD_LVL_OFFSET 8
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#define MATLAB_STATE_FOLD_LVL_MASK (0xFF00)
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#define MATLAB_STATE_FLAGS_OFFSET 16
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#define MATLAB_STATE_COMM_DEPTH_OFFSET 0
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#define MATLAB_STATE_COMM_DEPTH_MASK (0xFF)
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#define MATLAB_STATE_EXPECTING_ARG_BLOCK (1 << MATLAB_STATE_FLAGS_OFFSET)
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#define MATLAB_STATE_IN_CLASS_SCOPE (1 <<(MATLAB_STATE_FLAGS_OFFSET+1))
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#define MATLAB_STATE_IN_ARGUMENTS_SCOPE (1 <<(MATLAB_STATE_FLAGS_OFFSET+2))
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static int ComposeLineState(int commentDepth,
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int foldingLevel,
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int expectingArgumentsBlock,
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int inClassScope,
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int inArgumentsScope) {
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return ((commentDepth << MATLAB_STATE_COMM_DEPTH_OFFSET)
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& MATLAB_STATE_COMM_DEPTH_MASK) |
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((foldingLevel << MATLAB_STATE_FOLD_LVL_OFFSET)
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& MATLAB_STATE_FOLD_LVL_MASK) |
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(expectingArgumentsBlock
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& MATLAB_STATE_EXPECTING_ARG_BLOCK) |
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(inClassScope
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& MATLAB_STATE_IN_CLASS_SCOPE) |
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(inArgumentsScope
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& MATLAB_STATE_IN_ARGUMENTS_SCOPE);
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}
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static void ColouriseMatlabOctaveDoc(
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Sci_PositionU startPos, Sci_Position length, int initStyle,
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WordList *keywordlists[], Accessor &styler,
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bool (*IsCommentChar)(int),
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bool ismatlab) {
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WordList &keywords = *keywordlists[0];
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styler.StartAt(startPos);
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// boolean for when the ' is allowed to be transpose vs the start/end
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// of a string
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bool transpose = false;
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// count of brackets as boolean for when end could be an operator not a keyword
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int allow_end_op = 0;
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// approximate position of first non space character in a line
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int nonSpaceColumn = -1;
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// approximate column position of the current character in a line
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int column = 0;
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// This line contains a function declaration
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bool funcDeclarationLine = false;
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// We've just seen "function" keyword, so now we may expect the "arguments"
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// keyword opening the corresponding code block
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int expectingArgumentsBlock = 0;
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// We saw "arguments" keyword, but not the closing "end"
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int inArgumentsScope = 0;
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// Current line's folding level
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int foldingLevel = 0;
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// Current line in in class scope
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int inClassScope = 0;
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// use the line state of each line to store the block comment depth
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Sci_Position curLine = styler.GetLine(startPos);
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int commentDepth = 0;
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// Restore the previous line's state, if there was such a line
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if (curLine > 0) {
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int prevState = styler.GetLineState(curLine-1);
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commentDepth = (prevState & MATLAB_STATE_COMM_DEPTH_MASK)
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>> MATLAB_STATE_COMM_DEPTH_OFFSET;
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foldingLevel = (prevState & MATLAB_STATE_FOLD_LVL_MASK)
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>> MATLAB_STATE_FOLD_LVL_OFFSET;
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expectingArgumentsBlock = prevState & MATLAB_STATE_EXPECTING_ARG_BLOCK;
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inClassScope = prevState & MATLAB_STATE_IN_CLASS_SCOPE;
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inArgumentsScope = prevState & MATLAB_STATE_IN_ARGUMENTS_SCOPE;
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}
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StyleContext sc(startPos, length, initStyle, styler);
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for (; sc.More(); sc.Forward(), column++) {
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if(sc.atLineStart) {
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// set the line state to the current commentDepth
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curLine = styler.GetLine(sc.currentPos);
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styler.SetLineState(curLine, ComposeLineState(
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commentDepth, foldingLevel, expectingArgumentsBlock, inClassScope, inArgumentsScope));
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// reset the column to 0, nonSpace to -1 (not set)
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column = 0;
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nonSpaceColumn = -1;
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// Reset the flag
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funcDeclarationLine = false;
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}
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// Semicolon ends function declaration
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// This condition is for one line functions support
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if (sc.chPrev == ';') {
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funcDeclarationLine = false;
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}
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// Only comments allowed between the function declaration and the
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// arguments code block
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if (expectingArgumentsBlock && !(funcDeclarationLine || inArgumentsScope)) {
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if ((sc.state != SCE_MATLAB_KEYWORD) &&
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(sc.state != SCE_MATLAB_COMMENT) &&
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(sc.state != SCE_MATLAB_DEFAULT) &&
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!(sc.state == SCE_MATLAB_OPERATOR && sc.chPrev == ';')) {
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expectingArgumentsBlock = 0;
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styler.SetLineState(curLine, ComposeLineState(
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commentDepth, foldingLevel, expectingArgumentsBlock, inClassScope, inArgumentsScope));
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}
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}
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// We've just left the class scope
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if ((foldingLevel ==0) && inClassScope) {
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inClassScope = 0;
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}
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// save the column position of first non space character in a line
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if((nonSpaceColumn == -1) && (! IsASpace(sc.ch))) {
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nonSpaceColumn = column;
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}
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// check for end of states
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if (sc.state == SCE_MATLAB_OPERATOR) {
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if (sc.chPrev == '.') {
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if (sc.ch == '*' || sc.ch == '/' || sc.ch == '\\' || sc.ch == '^') {
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sc.ForwardSetState(SCE_MATLAB_DEFAULT);
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transpose = false;
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} else if (sc.ch == '\'') {
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sc.ForwardSetState(SCE_MATLAB_DEFAULT);
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transpose = true;
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} else if(sc.ch == '.' && sc.chNext == '.') {
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// we werent an operator, but a '...'
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sc.ChangeState(SCE_MATLAB_COMMENT);
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transpose = false;
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} else {
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sc.SetState(SCE_MATLAB_DEFAULT);
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}
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} else {
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sc.SetState(SCE_MATLAB_DEFAULT);
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}
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} else if (sc.state == SCE_MATLAB_KEYWORD) {
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if (!isalnum(sc.ch) && sc.ch != '_') {
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char s[100];
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sc.GetCurrent(s, sizeof(s));
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bool notKeyword = false;
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transpose = false;
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if (keywords.InList(s)) {
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expectingArgumentsBlock = (funcDeclarationLine || inArgumentsScope) ? expectingArgumentsBlock : 0;
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if (strcmp ("end", s) == 0 && allow_end_op) {
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sc.ChangeState(SCE_MATLAB_NUMBER);
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notKeyword = true;
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} else if (strcmp("end", s) == 0 && !allow_end_op) {
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inArgumentsScope = 0;
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} else if (strcmp("function", s) == 0) {
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// Need this flag to handle "arguments" block correctly
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funcDeclarationLine = true;
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expectingArgumentsBlock = ismatlab ? MATLAB_STATE_EXPECTING_ARG_BLOCK : 0;
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} else if (strcmp("classdef", s) == 0) {
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// Need this flag to process "events", "methods" and "properties" blocks
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inClassScope = MATLAB_STATE_IN_CLASS_SCOPE;
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}
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} else {
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// "arguments" is a keyword here, despite not being in the keywords list
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if (expectingArgumentsBlock && !(funcDeclarationLine || inArgumentsScope) && (strcmp("arguments", s) == 0)) {
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// We've entered an "arguments" block
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inArgumentsScope = MATLAB_STATE_IN_ARGUMENTS_SCOPE;
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} else {
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// Found an identifier or a keyword after the function declaration
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// No need to wait for the arguments block anymore
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expectingArgumentsBlock = (funcDeclarationLine || inArgumentsScope) ? expectingArgumentsBlock : 0;
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// "properties", "methods" and "events" are not keywords if they're declared
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// inside some function in methods block
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// To avoid tracking possible nested functions scopes, lexer considers everything
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// beyond level 2 of folding to be in a scope of some function declared in the
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// methods block. It is ok for the valid syntax: classes can only be declared in
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// a separate file, function - only in methods block. However, in case of the invalid
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// syntax lexer may erroneously ignore a keyword.
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if (!((inClassScope) && (foldingLevel <= 2) && (
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strcmp("properties", s) == 0 ||
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strcmp("methods", s) == 0 ||
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strcmp("events", s) == 0 ))) {
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sc.ChangeState(SCE_MATLAB_IDENTIFIER);
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transpose = true;
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notKeyword = true;
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}
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}
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}
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sc.SetState(SCE_MATLAB_DEFAULT);
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if (!notKeyword) {
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foldingLevel += CheckKeywordFoldPoint(s);
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}
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}
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styler.SetLineState(curLine, ComposeLineState(
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commentDepth, foldingLevel, expectingArgumentsBlock, inClassScope, inArgumentsScope));
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} else if (sc.state == SCE_MATLAB_NUMBER) {
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if (!isdigit(sc.ch) && sc.ch != '.'
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&& !(sc.ch == 'e' || sc.ch == 'E')
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&& !((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E'))
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&& !(((sc.ch == 'x' || sc.ch == 'X') && sc.chPrev == '0') || (sc.ch >= 'a' && sc.ch <= 'f') || (sc.ch >= 'A' && sc.ch <= 'F'))
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&& !(sc.ch == 's' || sc.ch == 'S' || sc.ch == 'u' || sc.ch == 'U')
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&& !(sc.ch == 'i' || sc.ch == 'I' || sc.ch == 'j' || sc.ch == 'J')
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&& !(sc.ch == '_')) {
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sc.SetState(SCE_MATLAB_DEFAULT);
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transpose = true;
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}
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} else if (sc.state == SCE_MATLAB_STRING) {
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if (sc.ch == '\'') {
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if (sc.chNext == '\'') {
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sc.Forward();
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} else {
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sc.ForwardSetState(SCE_MATLAB_DEFAULT);
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}
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} else if (sc.MatchLineEnd()) {
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sc.SetState(SCE_MATLAB_DEFAULT);
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}
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} else if (sc.state == SCE_MATLAB_DOUBLEQUOTESTRING) {
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if (sc.ch == '\\' && !ismatlab) {
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sc.Forward(); // skip escape sequence, new line and others after backlash
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} else if (sc.ch == '\"') {
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sc.ForwardSetState(SCE_MATLAB_DEFAULT);
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} else if (sc.MatchLineEnd()) {
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sc.SetState(SCE_MATLAB_DEFAULT);
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}
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} else if (sc.state == SCE_MATLAB_COMMAND) {
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if (sc.atLineEnd) {
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sc.SetState(SCE_MATLAB_DEFAULT);
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transpose = false;
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}
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} else if (sc.state == SCE_MATLAB_COMMENT) {
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// end or start of a nested a block comment?
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if( IsCommentChar(sc.ch) && sc.chNext == '}' && nonSpaceColumn == column && IsSpaceToEOL(sc.currentPos+2, styler)) {
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if(commentDepth > 0) commentDepth --;
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curLine = styler.GetLine(sc.currentPos);
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styler.SetLineState(curLine, ComposeLineState(
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commentDepth, foldingLevel, expectingArgumentsBlock, inClassScope, inArgumentsScope));
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sc.Forward();
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if (commentDepth == 0) {
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sc.ForwardSetState(SCE_MATLAB_DEFAULT);
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transpose = false;
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}
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} else if( IsCommentChar(sc.ch) && sc.chNext == '{' && nonSpaceColumn == column && IsSpaceToEOL(sc.currentPos+2, styler)) {
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commentDepth ++;
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curLine = styler.GetLine(sc.currentPos);
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styler.SetLineState(curLine, ComposeLineState(
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commentDepth, foldingLevel, expectingArgumentsBlock, inClassScope, inArgumentsScope));
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sc.Forward();
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transpose = false;
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} else if(commentDepth == 0) {
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// single line comment
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if (sc.atLineEnd || sc.ch == '\r' || sc.ch == '\n') {
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sc.SetState(SCE_MATLAB_DEFAULT);
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transpose = false;
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}
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}
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}
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// check start of a new state
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if (sc.state == SCE_MATLAB_DEFAULT) {
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if (IsCommentChar(sc.ch)) {
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// ncrement depth if we are a block comment
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if(sc.chNext == '{' && nonSpaceColumn == column) {
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if(IsSpaceToEOL(sc.currentPos+2, styler)) {
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commentDepth ++;
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}
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}
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curLine = styler.GetLine(sc.currentPos);
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styler.SetLineState(curLine, ComposeLineState(
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commentDepth, foldingLevel, expectingArgumentsBlock, inClassScope, inArgumentsScope));
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sc.SetState(SCE_MATLAB_COMMENT);
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} else if (sc.ch == '!' && sc.chNext != '=' ) {
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if(ismatlab) {
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sc.SetState(SCE_MATLAB_COMMAND);
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} else {
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sc.SetState(SCE_MATLAB_OPERATOR);
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}
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} else if (sc.ch == '\'') {
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if (transpose) {
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sc.SetState(SCE_MATLAB_OPERATOR);
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} else {
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sc.SetState(SCE_MATLAB_STRING);
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}
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} else if (sc.ch == '"') {
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sc.SetState(SCE_MATLAB_DOUBLEQUOTESTRING);
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} else if (isdigit(sc.ch) || (sc.ch == '.' && isdigit(sc.chNext))) {
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sc.SetState(SCE_MATLAB_NUMBER);
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} else if (isalpha(sc.ch)) {
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sc.SetState(SCE_MATLAB_KEYWORD);
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} else if (isoperator(static_cast<char>(sc.ch)) || sc.ch == '@' || sc.ch == '\\') {
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if (sc.ch == '(' || sc.ch == '[' || sc.ch == '{') {
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allow_end_op ++;
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} else if ((sc.ch == ')' || sc.ch == ']' || sc.ch == '}') && (allow_end_op > 0)) {
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allow_end_op --;
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}
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if (sc.ch == ')' || sc.ch == ']' || sc.ch == '}') {
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transpose = true;
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} else {
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transpose = false;
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}
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sc.SetState(SCE_MATLAB_OPERATOR);
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} else {
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transpose = false;
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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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static void ColouriseMatlabDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
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WordList *keywordlists[], Accessor &styler) {
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ColouriseMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsMatlabCommentChar, true);
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}
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static void ColouriseOctaveDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
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WordList *keywordlists[], Accessor &styler) {
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ColouriseMatlabOctaveDoc(startPos, length, initStyle, keywordlists, styler, IsOctaveCommentChar, false);
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}
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static void FoldMatlabOctaveDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
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WordList *[], Accessor &styler,
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bool (*IsComment)(int ch)) {
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if (styler.GetPropertyInt("fold") == 0)
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return;
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const bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
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const 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 levelCurrent = SC_FOLDLEVELBASE;
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if (lineCurrent > 0)
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levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
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int levelNext = levelCurrent;
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char chNext = styler[startPos];
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int styleNext = styler.StyleAt(startPos);
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int style = initStyle;
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char word[100];
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int wordlen = 0;
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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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style = styleNext;
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styleNext = styler.StyleAt(i + 1);
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bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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// a line that starts with a comment
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if (foldComment && style == SCE_MATLAB_COMMENT && IsComment(ch) && visibleChars == 0) {
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// 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);
|