/*
 * barrier -- mouse and keyboard sharing utility
 * Copyright (C) 2012-2016 Symless Ltd.
 * Copyright (C) 2004 Chris Schoeneman
 * 
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file LICENSE that should have accompanied this file.
 * 
 * This package 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/>.
 */

#pragma once

#include "barrier/IPlatformScreen.h"
#include "barrier/DragInformation.h"
#include <stdexcept>

//! Base screen implementation
/*!
This screen implementation is the superclass of all other screen
implementations.  It implements a handful of methods and requires
subclasses to implement the rest.
*/
class PlatformScreen : public IPlatformScreen {
public:
    PlatformScreen(IEventQueue* events);
    virtual ~PlatformScreen();

    // IScreen overrides
    virtual void*        getEventTarget() const = 0;
    virtual bool        getClipboard(ClipboardID id, IClipboard*) const = 0;
    virtual void        getShape(SInt32& x, SInt32& y,
                            SInt32& width, SInt32& height) const = 0;
    virtual void        getCursorPos(SInt32& x, SInt32& y) const = 0;

    // IPrimaryScreen overrides
    virtual void        reconfigure(UInt32 activeSides) = 0;
    virtual void        warpCursor(SInt32 x, SInt32 y) = 0;
    virtual UInt32        registerHotKey(KeyID key,
                            KeyModifierMask mask) = 0;
    virtual void        unregisterHotKey(UInt32 id) = 0;
    virtual void        fakeInputBegin() = 0;
    virtual void        fakeInputEnd() = 0;
    virtual SInt32        getJumpZoneSize() const = 0;
    virtual bool        isAnyMouseButtonDown(UInt32& buttonID) const = 0;
    virtual void        getCursorCenter(SInt32& x, SInt32& y) const = 0;

    // ISecondaryScreen overrides
    virtual void        fakeMouseButton(ButtonID id, bool press) = 0;
    virtual void        fakeMouseMove(SInt32 x, SInt32 y) = 0;
    virtual void        fakeMouseRelativeMove(SInt32 dx, SInt32 dy) const = 0;
    virtual void        fakeMouseWheel(SInt32 xDelta, SInt32 yDelta) const = 0;

    // IKeyState overrides
    virtual void        updateKeyMap();
    virtual void        updateKeyState();
    virtual void        setHalfDuplexMask(KeyModifierMask);
    virtual void        fakeKeyDown(KeyID id, KeyModifierMask mask,
                            KeyButton button);
    virtual bool        fakeKeyRepeat(KeyID id, KeyModifierMask mask,
                            SInt32 count, KeyButton button);
    virtual bool        fakeKeyUp(KeyButton button);
    virtual void        fakeAllKeysUp();
    virtual bool        fakeCtrlAltDel();
    virtual bool        isKeyDown(KeyButton) const;
    virtual KeyModifierMask
                        getActiveModifiers() const;
    virtual KeyModifierMask
                        pollActiveModifiers() const;
    virtual SInt32        pollActiveGroup() const;
    virtual void        pollPressedKeys(KeyButtonSet& pressedKeys) const;

    virtual void        setDraggingStarted(bool started) { m_draggingStarted = started; }
    virtual bool        isDraggingStarted();
    virtual bool        isFakeDraggingStarted() { return m_fakeDraggingStarted; }
    virtual String&    getDraggingFilename() { return m_draggingFilename; }
    virtual void        clearDraggingFilename() { }

    // IPlatformScreen overrides
    virtual void        enable() = 0;
    virtual void        disable() = 0;
    virtual void        enter() = 0;
    virtual bool        leave() = 0;
    virtual bool        setClipboard(ClipboardID, const IClipboard*) = 0;
    virtual void        checkClipboards() = 0;
    virtual void        openScreensaver(bool notify) = 0;
    virtual void        closeScreensaver() = 0;
    virtual void        screensaver(bool activate) = 0;
    virtual void        resetOptions() = 0;
    virtual void        setOptions(const OptionsList& options) = 0;
    virtual void        setSequenceNumber(UInt32) = 0;
    virtual bool        isPrimary() const = 0;
    
    virtual void        fakeDraggingFiles(DragFileList fileList) { throw std::runtime_error("fakeDraggingFiles not implemented"); }
    virtual const String&
                        getDropTarget() const { throw std::runtime_error("getDropTarget not implemented"); }
    virtual void        setDropTarget(const String&) { throw std::runtime_error("setDropTarget not implemented"); }

protected:
    //! Update mouse buttons
    /*!
    Subclasses must implement this method to update their internal mouse
    button mapping and, if desired, state tracking.
    */
    virtual void        updateButtons() = 0;

    //! Get the key state
    /*!
    Subclasses must implement this method to return the platform specific
    key state object that each subclass must have.
    */
    virtual IKeyState*    getKeyState() const = 0;

    // IPlatformScreen overrides
    virtual void        handleSystemEvent(const Event& event, void*) = 0;

protected:
    String                m_draggingFilename;
    bool                m_draggingStarted;
    bool                m_fakeDraggingStarted;
};
