src/stc/scintilla/lexlib/Accessor.cxx

   1 // Scintilla source code edit control
   2 /** @file KeyWords.cxx
   3  ** Colourise for particular languages.
   4  **/
   5 // Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <stdio.h>
  11 #include <stdarg.h>
  12 #include <assert.h>
  13 #include <ctype.h>
  14
  15 #include "ILexer.h"
  16 #include "Scintilla.h"
  17 #include "SciLexer.h"
  18
  19 #include "PropSetSimple.h"
  20 #include "WordList.h"
  21 #include "LexAccessor.h"
  22 #include "Accessor.h"
  23
  24 #ifdef SCI_NAMESPACE
  25 using namespace Scintilla;
  26 #endif
  27
  28 Accessor::Accessor(IDocument *pAccess_, PropSetSimple *pprops_) : LexAccessor(pAccess_), pprops(pprops_) {
  29 }
  30
  31 int Accessor::GetPropertyInt(const char *key, int defaultValue) {
  32         return pprops->GetInt(key, defaultValue);
  33 }
  34
  35 int Accessor::IndentAmount(int line, int *flags, PFNIsCommentLeader pfnIsCommentLeader) {
  36         int end = Length();
  37         int spaceFlags = 0;
  38
  39         // Determines the indentation level of the current line and also checks for consistent
  40         // indentation compared to the previous line.
  41         // Indentation is judged consistent when the indentation whitespace of each line lines
  42         // the same or the indentation of one line is a prefix of the other.
  43
  44         int pos = LineStart(line);
  45         char ch = (*this)[pos];
  46         int indent = 0;
  47         bool inPrevPrefix = line > 0;
  48         int posPrev = inPrevPrefix ? LineStart(line-1) : 0;
  49         while ((ch == ' ' || ch == '\t') && (pos < end)) {
  50                 if (inPrevPrefix) {
  51                         char chPrev = (*this)[posPrev++];
  52                         if (chPrev == ' ' || chPrev == '\t') {
  53                                 if (chPrev != ch)
  54                                         spaceFlags |= wsInconsistent;
  55                         } else {
  56                                 inPrevPrefix = false;
  57                         }
  58                 }
  59                 if (ch == ' ') {
  60                         spaceFlags |= wsSpace;
  61                         indent++;
  62                 } else {        // Tab
  63                         spaceFlags |= wsTab;
  64                         if (spaceFlags & wsSpace)
  65                                 spaceFlags |= wsSpaceTab;
  66                         indent = (indent / 8 + 1) * 8;
  67                 }
  68                 ch = (*this)[++pos];
  69         }
  70
  71         *flags = spaceFlags;
  72         indent += SC_FOLDLEVELBASE;
  73         // if completely empty line or the start of a comment...
  74         if ((LineStart(line) == Length()) || (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r') ||
  75                         (pfnIsCommentLeader && (*pfnIsCommentLeader)(*this, pos, end-pos)))
  76                 return indent | SC_FOLDLEVELWHITEFLAG;
  77         else
  78                 return indent;
  79 }