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console.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2005 The ScummVM project
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/gui/console.h,v 1.35.2.1 2005/10/18 02:11:18 sev Exp $
 */

#ifndef CONSOLE_DIALOG_H
#define CONSOLE_DIALOG_H

#include "gui/dialog.h"
#include "gui/newgui.h"

#include <stdarg.h>

namespace GUI {

enum {
      kBufferSize = 32768,
      kLineBufferSize = 256,

      kHistorySize = 20
};

class ScrollBarWidget;

class ConsoleDialog : public Dialog {
public:
      typedef bool (*InputCallbackProc)(ConsoleDialog *console, const char *input, void *refCon);
      typedef bool (*CompletionCallbackProc)(ConsoleDialog* console, const char *input, char*& completion, void *refCon);

protected:
      Graphics::Surface _canvas;
      const Graphics::Font *_font;

      char  _buffer[kBufferSize];
      int         _linesInBuffer;

      int         _lineWidth;
      int         _linesPerPage;

      int         _currentPos;
      int         _scrollLine;
      int         _firstLineInBuffer;

      int         _promptStartPos;
      int   _promptEndPos;

      bool  _caretVisible;
      uint32      _caretTime;

      enum SlideMode {
            kNoSlideMode,
            kUpSlideMode,
            kDownSlideMode
      };

      SlideMode   _slideMode;
      uint32      _slideTime;

      ScrollBarWidget *_scrollBar;

      // The _callbackProc is called whenver a data line is entered
      //
      InputCallbackProc _callbackProc;
      void *_callbackRefCon;

      // _completionCallbackProc is called when tab is pressed
      CompletionCallbackProc _completionCallbackProc;
      void *_completionCallbackRefCon;

      char _history[kHistorySize][kLineBufferSize];
      int _historySize;
      int _historyIndex;
      int _historyLine;

      float _widthPercent, _heightPercent;

      void slideUpAndClose();

public:
      ConsoleDialog(float widthPercent, float heightPercent);

      void open();
      void close();
      void drawDialog();

      void handleTickle();
      void handleScreenChanged();
      void handleMouseWheel(int x, int y, int direction);
      void handleKeyDown(uint16 ascii, int keycode, int modifiers);
      void handleCommand(CommandSender *sender, uint32 cmd, uint32 data);

      int printf(const char *format, ...);
      int vprintf(const char *format, va_list argptr);
#undef putchar
      void putchar(int c);

      void setInputCallback(InputCallbackProc proc, void *refCon) {
            _callbackProc = proc;
            _callbackRefCon = refCon;
      }
      void setCompletionCallback(CompletionCallbackProc proc, void *refCon) {
            _completionCallbackProc = proc;
            _completionCallbackRefCon = refCon;
      }

protected:
      inline char &buffer(int idx) {
            return _buffer[idx % kBufferSize];
      }

      void drawCaret(bool erase);
      void putcharIntern(int c);
      void insertIntoPrompt(const char *str);
      void print(const char *str);
      void updateScrollBuffer();
      void scrollToCurrent();

      // Line editing
      void specialKeys(int keycode);
      void nextLine();
      void killChar();
      void killLine();
      void killLastWord();

      // History
      void addToHistory(const char *str);
      void historyScroll(int direction);
};

} // End of namespace GUI

#endif

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