selection.hh

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/*
 * Dillo Widget
 *
 * Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
 * Copyright 2025 Rodrigo Arias Mallo <rodarima@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#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);
public:
   enum EventType { BUTTON_PRESS, BUTTON_RELEASE, BUTTON_MOTION };
 
   SelectionState ();
   ~SelectionState ();
 
   inline void setLayout (Layout *layout) { this->layout = layout; }
   void reset ();
   void copy (int selection);
   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 core
} // namespace dw
 
#endif // __DW_SELECTION_H__