koreader/keys.lua

--[[
    This file contains settings related to key codes

    Copyright (C) 2011 Hans-Werner Hilse <hilse@web.de>

    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/>.



    This file is based on include/keydefs.h from "launchpad"
    application, which is
    Copyright (C) 2010 Andy M. aka h1uke	h1ukeguy @ gmail.com
    and was licensed under the GPLv2
]]--

Keys = {
	altmode = false,
	shiftmode = false,
}

KEY_1 = 2
KEY_2 = 3
KEY_3 = 4
KEY_4 = 5
KEY_5 = 6
KEY_6 = 7
KEY_7 = 8
KEY_8 = 9
KEY_9 = 10
KEY_0 = 11
KEY_Q = 16
KEY_W = 17
KEY_E = 18
KEY_R = 19
KEY_T = 20
KEY_Y = 21
KEY_U = 22
KEY_I = 23
KEY_O = 24
KEY_P = 25
KEY_A = 30
KEY_S = 31
KEY_D = 32
KEY_F = 33
KEY_G = 34
KEY_H = 35
KEY_J = 36
KEY_K = 37
KEY_L = 38
KEY_DEL = 14
KEY_Z = 44
KEY_X = 45
KEY_C = 46
KEY_V = 47
KEY_B = 48
KEY_N = 49
KEY_M = 50
KEY_DOT = 52
KEY_SLASH = 53
KEY_ENTER = 28
KEY_SHIFT = 42
KEY_ALT = 56
KEY_SPACE = 57
KEY_AA = 90
KEY_SYM = 94
KEY_VPLUS = 115
KEY_VMINUS = 114
KEY_HOME = 98
KEY_PGBCK = 109
KEY_PGFWD = 124
KEY_MENU = 139
KEY_BACK = 91
KEY_FW_LEFT = 105
KEY_FW_RIGHT = 106
KEY_FW_UP = 122
KEY_FW_DOWN = 123
KEY_FW_PRESS = 92

-- this is for the K2 - it won't hurt on the KDX
KEY_LPGFWD = 104

KEY_INTO_SCREEN_SAVER = 10000
KEY_OUTOF_SCREEN_SAVER = 10001

-- constants from <linux/input.h>
EV_KEY = 1

-- event values
EVENT_VALUE_KEY_PRESS = 1
EVENT_VALUE_KEY_REPEAT = 2
EVENT_VALUE_KEY_RELEASE = 0

-- modifiers
MOD_SHIFT = "_Shift_"
MOD_ALT = "_Alt_"
MOD_SHIFT_OR_ALT = "_ShiftAlt_"
MOD_ANY = "_Any_"
MOD_SHIFT_DISPLAY = "Shift"
MOD_ALT_DISPLAY = "Alt"
MOD_TABLE = {MOD_SHIFT={v=MOD_SHIFT,d=MOD_SHIFT_DISPLAY},MOD_ALT={v=MOD_ALT,d=MOD_ALT_DISPLAY}}

function getKeyModifier()
	return Keys.altmode and MOD_ALT or Keys.shiftmode and MOD_SHIFT
end

function setK3Keycodes()
	KEY_AA = 190
	KEY_SYM = 126
	KEY_HOME = 102
	KEY_BACK = 158
	KEY_PGFWD = 191
	KEY_LPGBCK = 193
	KEY_LPGFWD = 104
	KEY_VPLUS = 115
	KEY_VMINUS = 114
	KEY_FW_UP = 103
	KEY_FW_DOWN = 108
	KEY_FW_PRESS = 194
end

function setEmuKeycodes()
	KEY_PGFWD = 117
	KEY_PGBCK = 112
	KEY_LPGBCK = 72 -- F6
	KEY_LPGFWD = 73 -- F7
	KEY_HOME = 110 -- home
	KEY_BACK = 22 -- backspace
	KEY_DEL = 119 -- Delete
	KEY_MENU = 67 -- F1
	KEY_FW_UP = 111
	KEY_FW_DOWN = 116
	KEY_FW_LEFT = 113
	KEY_FW_RIGHT = 114
	KEY_FW_PRESS = 115 -- end for now (above arrows)
	KEY_SPACE = 65

	KEY_ENTER = 36

	KEY_1 = 10
	KEY_2 = 11
	KEY_3 = 12
	KEY_4 = 13
	KEY_5 = 14
	KEY_6 = 15
	KEY_7 = 16
	KEY_8 = 17
	KEY_9 = 18
	KEY_0 = 19

	KEY_Q = 24
	KEY_W = 25
	KEY_E = 26
	KEY_R = 27
	KEY_T = 28
	KEY_Y = 29
	KEY_U = 30
	KEY_I = 31
	KEY_O = 32
	KEY_P = 33

	KEY_A = 38
	KEY_S = 39
	KEY_D = 40
	KEY_F = 41
	KEY_G = 42
	KEY_H = 43
	KEY_J = 44
	KEY_K = 45
	KEY_L = 46

	KEY_Z = 52
	KEY_X = 53
	KEY_C = 54
	KEY_V = 55
	KEY_B = 56
	KEY_N = 57
	KEY_M = 58

	KEY_DOT = 60
	KEY_SLASH = 61

	KEY_AA = 105 -- right alt
	KEY_SYM = 62 -- right shift

	KEY_SHIFT = 50 -- left shift
	KEY_ALT = 64   -- left alt
	KEY_VPLUS = 95  -- F11
	KEY_VMINUS = 96 -- F12
end


function adjustKeyEvents(ev)
	if ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_PRESS then
		if ev.code == KEY_SHIFT then
			Keys.shiftmode = true
		elseif ev.code == KEY_ALT then
			Keys.altmode = true
		end
	elseif ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_RELEASE then
		if ev.code == KEY_SHIFT then
			Keys.shiftmode = false
		elseif ev.code == KEY_ALT then
			Keys.altmode = false
		end
	end

	-- adjust five way key according to rotation mode
	local code = ev.code
	if Screen.cur_rotation_mode == 0 then
		return code
	elseif Screen.cur_rotation_mode == 1 then
		if code == KEY_FW_UP then
			return KEY_FW_RIGHT
		elseif code == KEY_FW_RIGHT then
			return KEY_FW_DOWN
		elseif code == KEY_FW_DOWN then
			return KEY_FW_LEFT
		elseif code == KEY_FW_LEFT then
			return KEY_FW_UP
		else
			return code
		end
	elseif Screen.cur_rotation_mode == 2 then
		if code == KEY_FW_UP then
			return KEY_FW_DOWN
		elseif code == KEY_FW_RIGHT then
			return KEY_FW_LEFT
		elseif code == KEY_FW_DOWN then
			return KEY_FW_UP
		elseif code == KEY_FW_LEFT then
			return KEY_FW_RIGHT
		else
			return code
		end
	elseif Screen.cur_rotation_mode == 3 then
		if code == KEY_FW_UP then
			return KEY_FW_LEFT
		elseif code == KEY_FW_RIGHT then
			return KEY_FW_UP
		elseif code == KEY_FW_DOWN then
			return KEY_FW_RIGHT
		elseif code == KEY_FW_LEFT then
			return KEY_FW_DOWN
		else
			return code
		end
	end
	-- This should not happen.
	Debug("# Unrecognizable rotation mode "..Screen.cur_rotation_mode.."!")
	return nil
end

-- wrapper for input.waitForEvents that will retry for some cases
function input.saveWaitForEvent(timeout)
	local retry = true
	while retry do
		local ok, ev = pcall(input.waitForEvent, timeout)
		if not ok then
			Debug("got error waiting for events:", ev)
			if ev == "Waiting for input failed: 4\n" then
				-- EINTR, we got interrupted. Try and restart
				retry = true
			else
				retry = false
			end
		else
			return ev
		end
	end
end