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// Scintilla source code edit control
/** @file LexIndent.cxx
** Lexer for no language. Used for indentation-based folding of files.
**/
// 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 <string>
#include <string_view>
#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 Lexilla;
static void ColouriseIndentDoc(Sci_PositionU startPos, Sci_Position length, int, WordList *[],
Accessor &styler) {
// Indent language means all style bytes are 0 so just mark the end - no need to fill in.
if (length > 0) {
styler.StartAt(startPos + length - 1);
styler.StartSegment(startPos + length - 1);
styler.ColourTo(startPos + length - 1, 0);
}
}
static void FoldIndentDoc(Sci_PositionU startPos, Sci_Position length, int /* initStyle */, WordList *[], Accessor &styler) {
int visibleCharsCurrent, visibleCharsNext;
int levelCurrent, levelNext;
Sci_PositionU i, lineEnd;
Sci_PositionU lengthDoc = startPos + length;
Sci_Position lineCurrent = styler.GetLine(startPos);
i = styler.LineStart(lineCurrent );
lineEnd = styler.LineStart(lineCurrent+1)-1;
if(lineEnd>=lengthDoc) lineEnd = lengthDoc-1;
while(styler[lineEnd]=='\n' || styler[lineEnd]=='\r') lineEnd--;
for(visibleCharsCurrent=0, levelCurrent=SC_FOLDLEVELBASE; !visibleCharsCurrent && i<=lineEnd; i++){
if(isspacechar(styler[i])) levelCurrent++;
else visibleCharsCurrent=1;
}
for(; i<lengthDoc; lineCurrent++) {
i = styler.LineStart(lineCurrent+1);
lineEnd = styler.LineStart(lineCurrent+2)-1;
if(lineEnd>=lengthDoc) lineEnd = lengthDoc-1;
while(styler[lineEnd]=='\n' || styler[lineEnd]=='\r') lineEnd--;
for(visibleCharsNext=0, levelNext=SC_FOLDLEVELBASE; !visibleCharsNext && i<=lineEnd; i++){
if(isspacechar(styler[i])) levelNext++;
else visibleCharsNext=1;
}
int lev = levelCurrent;
if(!visibleCharsCurrent) lev |= SC_FOLDLEVELWHITEFLAG;
else if(levelNext > levelCurrent) lev |= SC_FOLDLEVELHEADERFLAG;
styler.SetLevel(lineCurrent, lev);
levelCurrent = levelNext;
visibleCharsCurrent = visibleCharsNext;
}
}
LexerModule lmIndent(SCLEX_INDENT, ColouriseIndentDoc, "indent", FoldIndentDoc);
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