/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.

This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").

Contact information
-------------------

Circuits At Home, LTD
Web      :  http://www.circuitsathome.com
e-mail   :  support@circuitsathome.com
 */
#include "hidboot.h"

void MouseReportParser::Parse(USBHID *hid __attribute__((unused)), bool is_rpt_id __attribute__((unused)), uint8_t len __attribute__((unused)), uint8_t *buf) {
        MOUSEINFO *pmi = (MOUSEINFO*)buf;
        // Future:
        // bool event;

#if 0
        if (prevState.mouseInfo.bmLeftButton == 0 && pmi->bmLeftButton == 1)
                OnLeftButtonDown(pmi);

        if (prevState.mouseInfo.bmLeftButton == 1 && pmi->bmLeftButton == 0)
                OnLeftButtonUp(pmi);

        if (prevState.mouseInfo.bmRightButton == 0 && pmi->bmRightButton == 1)
                OnRightButtonDown(pmi);

        if (prevState.mouseInfo.bmRightButton == 1 && pmi->bmRightButton == 0)
                OnRightButtonUp(pmi);

        if (prevState.mouseInfo.bmMiddleButton == 0 && pmi->bmMiddleButton == 1)
                OnMiddleButtonDown(pmi);

        if (prevState.mouseInfo.bmMiddleButton == 1 && pmi->bmMiddleButton == 0)
                OnMiddleButtonUp(pmi);

        if (prevState.mouseInfo.dX != pmi->dX || prevState.mouseInfo.dY != pmi->dY)
                OnMouseMove(pmi);

        if (len > sizeof (MOUSEINFO))
                for (uint8_t i = 0; i<sizeof (MOUSEINFO); i++)
                        prevState.bInfo[i] = buf[i];
#else
        //
        // Optimization idea:
        //
        // 1: Don't pass the structure on every event. Buttons would not need it.
        // 2: Only pass x/y values in the movement routine.
        //
        // These two changes (with the ones I have made) will save extra flash.
        // The only "bad" thing is that it could break old code.
        //
        // Future thoughts:
        //
        // The extra space gained can be used for a generic mouse event that can be called
        // when there are _ANY_ changes. This one you _MAY_ want to pass everything, however the
        // sketch could already have noted these facts to support drag/drop scroll wheel stuff, etc.
        //

        // Why do we need to pass the structure for buttons?
        // The function call not enough of a hint for what is happening?
        if(prevState.mouseInfo.bmLeftButton != pmi->bmLeftButton ) {
                if(pmi->bmLeftButton) {
                        OnLeftButtonDown(pmi);
                } else {
                        OnLeftButtonUp(pmi);
                }
                // Future:
                // event = true;
        }

        if(prevState.mouseInfo.bmRightButton != pmi->bmRightButton) {
                if(pmi->bmRightButton) {
                        OnRightButtonDown(pmi);
                } else {
                        OnRightButtonUp(pmi);
                }
                // Future:
                // event = true;
        }

        if(prevState.mouseInfo.bmMiddleButton != pmi->bmMiddleButton) {
                if(pmi->bmMiddleButton) {
                        OnMiddleButtonDown(pmi);
                } else {
                        OnMiddleButtonUp(pmi);
                }
                // Future:
                // event = true;
        }

        //
        // Scroll wheel(s), are not part of the spec, but we could support it.
        // Logitech wireless keyboard and mouse combo reports scroll wheel in byte 4
        // We wouldn't even need to save this information.
        //if(len > 3) {
        //}
        //

        // Mice only report motion when they actually move!
        // Why not just pass the x/y values to simplify things??
        if(pmi->dX || pmi->dY) {
                OnMouseMove(pmi);
                // Future:
                // event = true;
        }

        //
        // Future:
        // Provide a callback that operates on the gathered events from above.
        //
        // if(event) OnMouse();
        //

        // Only the first byte matters (buttons). We do NOT need to save position info.
        prevState.bInfo[0] = buf[0];
#endif

};

void KeyboardReportParser::Parse(USBHID *hid, bool is_rpt_id __attribute__((unused)), uint8_t len __attribute__((unused)), uint8_t *buf) {
        // On error - return
        if (buf[2] == 1)
                return;

        //KBDINFO       *pki = (KBDINFO*)buf;

        // provide event for changed control key state
        if (prevState.bInfo[0x00] != buf[0x00]) {
                OnControlKeysChanged(prevState.bInfo[0x00], buf[0x00]);
        }

        for (uint8_t i = 2; i < 8; i++) {
                bool down = false;
                bool up = false;

                for (uint8_t j = 2; j < 8; j++) {
                        if (buf[i] == prevState.bInfo[j] && buf[i] != 1)
                                down = true;
                        if (buf[j] == prevState.bInfo[i] && prevState.bInfo[i] != 1)
                                up = true;
                }
                if (!down) {
                        HandleLockingKeys(hid, buf[i]);
                        OnKeyDown(*buf, buf[i]);
                }
                if (!up)
                        OnKeyUp(prevState.bInfo[0], prevState.bInfo[i]);
        }
        for (uint8_t i = 0; i < 8; i++)
                prevState.bInfo[i] = buf[i];
};

const uint8_t KeyboardReportParser::US_numKeys[10]  PROGMEM = {'!', '@', '#', '$', '%', '^', '&', '*', '(', ')'}; // HID Scancode 0x1e - 0x27
const uint8_t KeyboardReportParser::US_numKeysAlt[10] PROGMEM = {'1', '2', '3', '4', '5', '6', '7', '8', '9', '0'}; // HID Scancode 0x1e - 0x27 Numkeys with Alt

const uint8_t KeyboardReportParser::DE_numKeys[10]    PROGMEM = {'!', '"', '§', '$', '%', '&', '/', '(', ')', '='}; // HID Scancode 0x1e - 0x27 Numkeys with Shift
const uint8_t KeyboardReportParser::DE_numKeysAlt[10] PROGMEM = {'1', '²', '³', '4', '5', '6', '{', '[', ']', '}'}; // HID Scancode 0x1e - 0x27 Numkeys with Alt


const uint8_t KeyboardReportParser::US_symKeysUp[12] PROGMEM = {'_', '+', '{', '}', '|',  '~', ':', '"',  '~', '<', '>', '?'}; //HID Scancode 0x2d - 0x38 with Shift
const uint8_t KeyboardReportParser::US_symKeysLo[12] PROGMEM = {'-', '=', '[', ']', '\\', ' ', ';', '\'', '`', ',', '.', '/'}; //HID Scancode 0x2d - 0x38

const uint8_t KeyboardReportParser::DE_symKeysUp[12] PROGMEM = {'?', '`', 'Ü', '*', '|',  '\'', 'Ö', 'Ä', '°', ';', ':', '_'}; //HID Scancode 0x2d - 0x38 with Shift
const uint8_t KeyboardReportParser::DE_symKeysLo[12] PROGMEM = {'ß', '´', 'ü', '+', '\\', '#',  'ö', 'ä', '^', ',', '.', '-'}; //HID Scancode 0x2d - 0x38

const uint8_t KeyboardReportParser::US_padKeys[5] PROGMEM = {'/', '*', '-', '+', 0x0D}; // HID Scancode 0x54 - 0x58

const uint8_t KeyboardReportParser::DE_padKeys[5] PROGMEM = {'/', '*', '-', '+', 0x0D}; // HID Scancode 0x54 - 0x58

uint8_t KeyboardReportParser::OemToAscii(uint8_t mod, uint8_t key) 
{
	uint8_t shift = (mod & 0x22);
	uint8_t ctrl = (mod & 0x11);
	uint8_t AltGr = (mod & 0x40);
	uint8_t LeftCtrlAlt = (mod & 0x05);
	uint8_t LeftGUI = (mod & 0x08);

    // [a-z] HID Scancode 0x04 - 0x1D
    if (VALUE_WITHIN(key, 0x04, 0x1d))
	{
		if (ctrl)
		{
			return (key - 3);
		}
		else
		{
			// Upper case letters
			if ((kbdLockingKeys.kbdLeds.bmCapsLock == 0 && shift) || (kbdLockingKeys.kbdLeds.bmCapsLock == 1 && shift == 0))
			{
				uint8_t uiReturnValue;
				
				uiReturnValue = (key - 4 + 'A');
				
				if (1 == uiCurrectSelectedLayout)
				{
					if ('Z' == uiReturnValue)
						uiReturnValue = 'Y';
					else if ('Y' == uiReturnValue)
						uiReturnValue = 'Z';
				}
				
				return uiReturnValue;
			}
			// Lower case letters
			else
			{
				uint8_t uiReturnValue;
				
				uiReturnValue = (key - 4 + 'a');
				
				if (1 == uiCurrectSelectedLayout)
				{
					if ('z' == uiReturnValue)
						uiReturnValue = 'y';
					else if ('y' == uiReturnValue)
						uiReturnValue = 'z';
				}
				return uiReturnValue;
			}
		}
    }
	// Numbers HID Scancode 0x1e - 0x27
    else if (VALUE_WITHIN(key, 0x1e, 0x27)) 
	{
		if (AltGr)
		{
			return ((uint8_t)pgm_read_byte(&getNumKeysAlt()[key - 0x1e])); // From numKeys Array
		}
		else if (shift)
		{
			return ((uint8_t)pgm_read_byte(&getNumKeys()[key - 0x1e])); // From numKeys Array
		}
        else
		{
            return ((key == UHS_HID_BOOT_KEY_ZERO) ? '0' : key - 0x1e + '1'); //Numbers '1' - '0'
		}
    }
	// Keypad Numbers HID Scancode 0x59 - 0x61
    else if(VALUE_WITHIN(key, 0x59, 0x61)) 
	{
		if(kbdLockingKeys.kbdLeds.bmNumLock == 1)
		{
			return (key - 0x59 + '1');
		}
    } 
    // Symbol Keys HID Scancode 0x2d - 0x38
	else if(VALUE_WITHIN(key, 0x2d, 0x38))
	{
		return ((shift) ? (uint8_t)pgm_read_byte(&getSymKeysUp()[key - 0x2d]) : (uint8_t)pgm_read_byte(&getSymKeysLo()[key - 0x2d]));
	}
	//Keypad Keys HID Scancode 0x54 - 0x58
    else if(VALUE_WITHIN(key, 0x54, 0x58))
	{
        return (uint8_t)pgm_read_byte(&getPadKeys()[key - 0x54]);
	}
	//Keys to be handled spereately
    else 
	{
		switch(key) 
		{
			case UHS_HID_KEY_RIGHT: return (0x15); 				
			case UHS_HID_KEY_LEFT: 	return (0x08);		
			case UHS_HID_BOOT_KEY_TAB:
				return (0x09);
				
			case UHS_HID_BOOT_KEY_DELETE: 
				if (LeftCtrlAlt)
					return(0x11); //DC1 Reset
				return (0x7F);
				
			case UHS_HID_BOOT_KEY_BACKSPACE: 
				return (0x08);
			
			case UHS_HID_BOOT_KEY_ESC: 
				return (0x1B);
			
			case UHS_HID_BOOT_KEY_SPACE:
				if (LeftGUI)
					return(0x12); //DC2 Switch Keyboard Layout
				return (0x20);
				
            case UHS_HID_BOOT_KEY_ENTER: 
            	return (0x0D);
            	
            case UHS_HID_BOOT_KEY_ZERO2: return ((kbdLockingKeys.kbdLeds.bmNumLock == 1) ? '0': 0);
            case UHS_HID_BOOT_KEY_PERIOD: return ((kbdLockingKeys.kbdLeds.bmNumLock == 1) ? '.': 0);
        }
    }
    
	return(0);
}