/*
 * 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.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 */

/** \file
 * \ingroup GHOST
 * Declaration of GHOST_Window class.
 */

#ifndef __GHOST_WINDOW_H__
#define __GHOST_WINDOW_H__

#include "GHOST_IWindow.h"

class GHOST_Context;

/**
 * Platform independent implementation of GHOST_IWindow.
 * Dimensions are given in screen coordinates that are relative to the
 * upper-left corner of the screen.
 * Implements part of the GHOST_IWindow interface and adds some methods to
 * be implemented by sub-classes of this class.
 */
class GHOST_Window : public GHOST_IWindow {
 public:
  /**
   * Constructor.
   * Creates a new window and opens it.
   * To check if the window was created properly, use the getValid() method.
   * \param width             The width the window.
   * \param heigh             The height the window.
   * \param state             The state the window is initially opened with.
   * \param type              The type of drawing context installed in this window.
   * \param stereoVisual      Stereo visual for quad buffered stereo.
   * \param exclusive         Use to show the window ontop and ignore others
   *                          (used fullscreen).
   */
  GHOST_Window(GHOST_TUns32 width,
               GHOST_TUns32 height,
               GHOST_TWindowState state,
               const bool wantStereoVisual = false,
               const bool exclusive = false);

  /**
   * \section Interface inherited from GHOST_IWindow left for derived class
   * implementation.
   * virtual  bool getValid() const = 0;
   * virtual void setTitle(const char * title) = 0;
   * virtual std::string getTitle() const = 0;
   * virtual  void getWindowBounds(GHOST_Rect& bounds) const = 0;
   * virtual  void getClientBounds(GHOST_Rect& bounds) const = 0;
   * virtual  GHOST_TSuccess setClientWidth(GHOST_TUns32 width) = 0;
   * virtual  GHOST_TSuccess setClientHeight(GHOST_TUns32 height) = 0;
   * virtual  GHOST_TSuccess setClientSize(GHOST_TUns32 width, GHOST_TUns32 height) = 0;
   * virtual void screenToClient(
   *     GHOST_TInt32 inX, GHOST_TInt32 inY, GHOST_TInt32& outX, GHOST_TInt32& outY) const = 0;
   * virtual void clientToScreen(
   *     GHOST_TInt32 inX, GHOST_TInt32 inY, GHOST_TInt32& outX, GHOST_TInt32& outY) const = 0;
   * virtual GHOST_TWindowState getState() const = 0;
   * virtual GHOST_TSuccess setState(GHOST_TWindowState state) = 0;
   * virtual GHOST_TSuccess setOrder(GHOST_TWindowOrder order) = 0;
   * virtual GHOST_TSuccess swapBuffers() = 0;
   * virtual GHOST_TSuccess setSwapInterval() = 0;
   * virtual GHOST_TSuccess getSwapInterval(int& intervalOut) = 0;
   * virtual GHOST_TSuccess activateDrawingContext() = 0;
   * virtual GHOST_TSuccess invalidate() = 0;
   */

  /**
   * Destructor.
   * Closes the window and disposes resources allocated.
   */
  virtual ~GHOST_Window();

  /**
   * Returns indication as to whether the window is valid.
   * \return The validity of the window.
   */
  virtual bool getValid() const
  {
    return m_context != NULL;
  }

  /**
   * Returns the associated OS object/handle
   * \return The associated OS object/handle
   */
  virtual void *getOSWindow() const;

  /**
   * Returns the current cursor shape.
   * \return  The current cursor shape.
   */
  inline GHOST_TStandardCursor getCursorShape() const;

  inline bool isDialog() const
  {
    return false;
  }

  /**
   * Set the shape of the cursor.
   * \param   cursorShape: The new cursor shape type id.
   * \return  Indication of success.
   */
  GHOST_TSuccess setCursorShape(GHOST_TStandardCursor cursorShape);

  /**
   * Set the shape of the cursor to a custom cursor.
   * \param   bitmap  The bitmap data for the cursor.
   * \param   mask    The mask data for the cursor.
   * \param   hotX    The X coordinate of the cursor hot-spot.
   * \param   hotY    The Y coordinate of the cursor hot-spot.
   * \return  Indication of success.
   */
  GHOST_TSuccess setCustomCursorShape(GHOST_TUns8 *bitmap,
                                      GHOST_TUns8 *mask,
                                      int sizex,
                                      int sizey,
                                      int hotX,
                                      int hotY,
                                      bool canInvertColor);

  /**
   * Returns the visibility state of the cursor.
   * \return  The visibility state of the cursor.
   */
  inline bool getCursorVisibility() const;
  inline GHOST_TGrabCursorMode getCursorGrabMode() const;
  inline bool getCursorGrabModeIsWarp() const;
  inline GHOST_TAxisFlag getCursorGrabAxis() const;
  inline void getCursorGrabInitPos(GHOST_TInt32 &x, GHOST_TInt32 &y) const;
  inline void getCursorGrabAccum(GHOST_TInt32 &x, GHOST_TInt32 &y) const;
  inline void setCursorGrabAccum(GHOST_TInt32 x, GHOST_TInt32 y);

  /**
   * Shows or hides the cursor.
   * \param   visible The new visibility state of the cursor.
   * \return  Indication of success.
   */
  GHOST_TSuccess setCursorVisibility(bool visible);

  /**
   * Sets the cursor grab.
   * \param   mode The new grab state of the cursor.
   * \return  Indication of success.
   */
  GHOST_TSuccess setCursorGrab(GHOST_TGrabCursorMode mode,
                               GHOST_TAxisFlag wrap_axis,
                               GHOST_Rect *bounds,
                               GHOST_TInt32 mouse_ungrab_xy[2]);

  /**
   * Gets the cursor grab region, if unset the window is used.
   * reset when grab is disabled.
   */
  GHOST_TSuccess getCursorGrabBounds(GHOST_Rect &bounds);

  /**
   * Sets the progress bar value displayed in the window/application icon
   * \param progress The progress % (0.0 to 1.0)
   */
  virtual GHOST_TSuccess setProgressBar(float /*progress*/)
  {
    return GHOST_kFailure;
  }

  /**
   * Hides the progress bar in the icon
   */
  virtual GHOST_TSuccess endProgressBar()
  {
    return GHOST_kFailure;
  }

  /**
   * Sets the swap interval for swapBuffers.
   * \param interval The swap interval to use.
   * \return A boolean success indicator.
   */
  GHOST_TSuccess setSwapInterval(int interval);

  /**
   * Gets the current swap interval for swapBuffers.
   * \return An integer.
   */
  GHOST_TSuccess getSwapInterval(int &intervalOut);

  /**
   * Tells if the ongoing drag'n'drop object can be accepted upon mouse drop
   */
  void setAcceptDragOperation(bool canAccept);

  /**
   * Returns acceptance of the dropped object
   * Usually called by the "object dropped" event handling function
   */
  bool canAcceptDragOperation() const;

  /**
   * Sets the window "modified" status, indicating unsaved changes
   * \param isUnsavedChanges Unsaved changes or not
   * \return Indication of success.
   */
  virtual GHOST_TSuccess setModifiedState(bool isUnsavedChanges);

  /**
   * Gets the window "modified" status, indicating unsaved changes
   * \return True if there are unsaved changes
   */
  virtual bool getModifiedState();

  /**
   * Returns the type of drawing context used in this window.
   * \return The current type of drawing context.
   */
  inline GHOST_TDrawingContextType getDrawingContextType();

  /**
   * Tries to install a rendering context in this window.
   * Child classes do not need to overload this method,
   * They should overload newDrawingContext instead.
   * \param type  The type of rendering context installed.
   * \return Indication as to whether installation has succeeded.
   */
  GHOST_TSuccess setDrawingContextType(GHOST_TDrawingContextType type);

  /**
   * Swaps front and back buffers of a window.
   * \return  A boolean success indicator.
   */
  virtual GHOST_TSuccess swapBuffers();

  /**
   * Activates the drawing context of this window.
   * \return  A boolean success indicator.
   */
  virtual GHOST_TSuccess activateDrawingContext();

  /**
   * Updates the drawing context of this window. Needed
   * whenever the window is changed.
   * \return Indication of success.
   */
  GHOST_TSuccess updateDrawingContext();

  /**
   * Gets the OpenGL framebuffer associated with the window's contents.
   * \return The ID of an OpenGL framebuffer object.
   */
  virtual unsigned int getDefaultFramebuffer();

  /**
   * Returns the window user data.
   * \return The window user data.
   */
  inline GHOST_TUserDataPtr getUserData() const
  {
    return m_userData;
  }

  /**
   * Changes the window user data.
   * \param userData: The window user data.
   */
  void setUserData(const GHOST_TUserDataPtr userData)
  {
    m_userData = userData;
  }

  float getNativePixelSize(void)
  {
    if (m_nativePixelSize > 0.0f)
      return m_nativePixelSize;
    return 1.0f;
  }

  /**
   * Returns the recommended DPI for this window.
   * \return The recommended DPI for this window.
   */
  virtual inline GHOST_TUns16 getDPIHint()
  {
    return 96;
  }

#ifdef WITH_INPUT_IME
  virtual void beginIME(
      GHOST_TInt32 x, GHOST_TInt32 y, GHOST_TInt32 w, GHOST_TInt32 h, int completed)
  {
    /* do nothing temporarily if not in windows */
  }

  virtual void endIME()
  {
    /* do nothing temporarily if not in windows */
  }
#endif /* WITH_INPUT_IME */

 protected:
  /**
   * Tries to install a rendering context in this window.
   * \param type  The type of rendering context installed.
   * \return Indication as to whether installation has succeeded.
   */
  virtual GHOST_Context *newDrawingContext(GHOST_TDrawingContextType type) = 0;

  /**
   * Sets the cursor visibility on the window using
   * native window system calls.
   */
  virtual GHOST_TSuccess setWindowCursorVisibility(bool visible) = 0;

  /**
   * Sets the cursor grab on the window using
   * native window system calls.
   */
  virtual GHOST_TSuccess setWindowCursorGrab(GHOST_TGrabCursorMode /*mode*/)
  {
    return GHOST_kSuccess;
  }

  /**
   * Sets the cursor shape on the window using
   * native window system calls.
   */
  virtual GHOST_TSuccess setWindowCursorShape(GHOST_TStandardCursor shape) = 0;

  /**
   * Sets the cursor shape on the window using
   * native window system calls.
   */
  virtual GHOST_TSuccess setWindowCustomCursorShape(GHOST_TUns8 *bitmap,
                                                    GHOST_TUns8 *mask,
                                                    int szx,
                                                    int szy,
                                                    int hotX,
                                                    int hotY,
                                                    bool canInvertColor) = 0;

  GHOST_TSuccess releaseNativeHandles();

  /** The drawing context installed in this window. */
  GHOST_TDrawingContextType m_drawingContextType;

  /** The window user data */
  GHOST_TUserDataPtr m_userData;

  /** The current visibility of the cursor */
  bool m_cursorVisible;

  /** The current grabbed state of the cursor */
  GHOST_TGrabCursorMode m_cursorGrab;

  /** Grab cursor axis.*/
  GHOST_TAxisFlag m_cursorGrabAxis;

  /** Initial grab location. */
  GHOST_TInt32 m_cursorGrabInitPos[2];

  /** Accumulated offset from m_cursorGrabInitPos. */
  GHOST_TInt32 m_cursorGrabAccumPos[2];

  /** Wrap the cursor within this region. */
  GHOST_Rect m_cursorGrabBounds;

  /** The current shape of the cursor */
  GHOST_TStandardCursor m_cursorShape;

  /** The presence of progress indicator with the application icon */
  bool m_progressBarVisible;

  /** The acceptance of the "drop candidate" of the current drag'n'drop operation */
  bool m_canAcceptDragOperation;

  /** Modified state : are there unsaved changes */
  bool m_isUnsavedChanges;

  /** Stores whether this is a full screen window. */
  bool m_fullScreen;

  /** Whether to attempt to initialize a context with a stereo framebuffer. */
  bool m_wantStereoVisual;

  /** Full-screen width */
  GHOST_TUns32 m_fullScreenWidth;
  /** Full-screen height */
  GHOST_TUns32 m_fullScreenHeight;

  /* OSX only, retina screens */
  float m_nativePixelSize;

 private:
  GHOST_Context *m_context;
};

inline GHOST_TDrawingContextType GHOST_Window::getDrawingContextType()
{
  return m_drawingContextType;
}

inline bool GHOST_Window::getCursorVisibility() const
{
  return m_cursorVisible;
}

inline GHOST_TGrabCursorMode GHOST_Window::getCursorGrabMode() const
{
  return m_cursorGrab;
}

inline bool GHOST_Window::getCursorGrabModeIsWarp() const
{
  return (m_cursorGrab == GHOST_kGrabWrap) || (m_cursorGrab == GHOST_kGrabHide);
}

inline GHOST_TAxisFlag GHOST_Window::getCursorGrabAxis() const
{
  return m_cursorGrabAxis;
}

inline void GHOST_Window::getCursorGrabInitPos(GHOST_TInt32 &x, GHOST_TInt32 &y) const
{
  x = m_cursorGrabInitPos[0];
  y = m_cursorGrabInitPos[1];
}

inline void GHOST_Window::getCursorGrabAccum(GHOST_TInt32 &x, GHOST_TInt32 &y) const
{
  x = m_cursorGrabAccumPos[0];
  y = m_cursorGrabAccumPos[1];
}

inline void GHOST_Window::setCursorGrabAccum(GHOST_TInt32 x, GHOST_TInt32 y)
{
  m_cursorGrabAccumPos[0] = x;
  m_cursorGrabAccumPos[1] = y;
}

inline GHOST_TStandardCursor GHOST_Window::getCursorShape() const
{
  return m_cursorShape;
}

#endif  // _GHOST_WINDOW_H