dw/selection.hh

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#ifndef __DW_SELECTION_H__
#define __DW_SELECTION_H__

#ifndef __INCLUDED_FROM_DW_CORE_HH__
#   error Do not include this file directly, use "core.hh" instead.
#endif

namespace dw {
namespace core {

class SelectionState
{
public:
   enum { END_OF_WORD =  1 << 30 };

private:
   Layout *layout;

   // selection
   enum {
      NONE,
      SELECTING,
      SELECTED
   } selectionState;

   DeepIterator *from, *to;
   int fromChar, toChar;

   // link handling
   enum {
      LINK_NONE,
      LINK_PRESSED
   } linkState;

   int linkButton;
   DeepIterator *link;
   int linkChar, linkNumber;

   void resetSelection ();
   void resetLink ();
   void switchLinkToSelection (Iterator *it, int charPos);
   void adjustSelection (Iterator *it, int charPos);
   static int correctCharPos (DeepIterator *it, int charPos);

   void highlight (bool fl, int dir)
   { highlight0 (fl, from, fromChar, to, toChar, dir); }

   void highlight0 (bool fl, DeepIterator *from, int fromChar,
                    DeepIterator *to, int toChar, int dir);
   void copy ();

public:
   enum EventType { BUTTON_PRESS, BUTTON_RELEASE, BUTTON_MOTION };

   SelectionState ();
   ~SelectionState ();

   inline void setLayout (Layout *layout) { this->layout = layout; }
   void reset ();
   bool buttonPress (Iterator *it, int charPos, int linkNo,
                     EventButton *event);
   bool buttonRelease (Iterator *it, int charPos, int linkNo,
                       EventButton *event);
   bool buttonMotion (Iterator *it, int charPos, int linkNo,
                      EventMotion *event);

   bool handleEvent (EventType eventType, Iterator *it, int charPos,
                     int linkNo, MousePositionEvent *event);
};

} // namespace dw
} // namespace core

#endif // __DW_SELECTION_H__

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