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