src/textcursor.C

   1 /**
   2  * \file textcursor.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "textcursor.h"
  14 #include "paragraph.h"
  15 #include "ParagraphList_fwd.h"
  16 #include "debug.h"
  17
  18 #include <string>
  19
  20 using std::string;
  21
  22
  23 void TextCursor::setSelection()
  24 {
  25         selection.set(true);
  26
  27         if (selection.cursor.par() == cursor.par())
  28                 if (selection.cursor.pos() < cursor.pos()) {
  29                         selection.end = cursor;
  30                         selection.start = selection.cursor;
  31                 } else {
  32                         selection.end = selection.cursor;
  33                         selection.start = cursor;
  34                 }
  35         else if (selection.cursor.par() < cursor.par() ||
  36                  (selection.cursor.par() == cursor.par()
  37                   && selection.cursor.pos() < cursor.pos())) {
  38                 selection.end = cursor;
  39                 selection.start = selection.cursor;
  40         } else {
  41                 selection.end = selection.cursor;
  42                 selection.start = cursor;
  43         }
  44
  45         // a selection with no contents is not a selection
  46         if (selection.start.par() == selection.end.par() &&
  47             selection.start.pos() == selection.end.pos())
  48         {
  49                 selection.set(false);
  50         }
  51 }
  52
  53
  54 void TextCursor::clearSelection()
  55 {
  56         selection.set(false);
  57         selection.mark(false);
  58         selection.end    = cursor;
  59         selection.start  = cursor;
  60         selection.cursor = cursor;
  61 }
  62