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easy-switcher.lpr
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easy-switcher.lpr
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program easyswitcher;
{$mode objfpc}
{$h+}
uses
cThreads,
BaseUnix,
Linux,
SysUtils,
Classes,
IniFiles,
EventLog,
Errors;
type
input_event = record //c-style struct input_event
time: timeval;
ie_type: cuint16;
code: cuint16;
Value: cint32;
end;
input_id = record //c-style struct input_id
bustype: cuint16;
vendor: cuint16;
product: cuint16;
version: cuint16;
end;
uinput_setup = record //c-style struct uinput_setup
id: input_id;
Name: array[0..79] of char;
ff_effects_max: cuint32;
end;
KeyboardDetectInfo = record
Id: PtrInt;
Active: boolean;
Path: string;
end;
TKeyboardList = array of KeyboardDetectInfo;
TKeyBuf = array of input_event;
TEmitBuf = array [1..2] of input_event;
TBufferAction = (KeepBuffer, ReplaceAll, ReplaceWord);
TQueueSelector = (TCIFLUSH, TCOFLUSH, TCIOFLUSH);
const
EASY_SWITCHER_VERSION = '0.3';
SYSTEMD_UNIT_FILE = '/lib/systemd/system/easy-switcher.service';
CONFIG_FILE = '/etc/easy-switcher/default.conf';
INPUT_DEVICES_DIR = '/dev/input/';
UINPUT_FILE = '/dev/uinput';
EV_SYN = $0000; //key events
EV_KEY = $0001;
SYN_REPORT = $0000;
UI_SET_EVBIT = $40045564; // magic numbers
UI_SET_KEYBIT = $40045565;
UI_DEV_SETUP = $405C5503;
UI_DEV_CREATE = $5501;
UI_DEV_DESTROY = $5502;
BUS_USB = $0003; //virtual keyboard bus
EINTR = $0004; // Interrupted system call
EIO = $0005; // I/O error
TCFLSH = $0000540B;
//keys to watch and replace
Letters = [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18,
19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 34, 35,
36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
53, 55, 57, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 96, 98];
Shifts = [42, 54];
BufKillers = [15, 29, 56, 97, 100, 102, 103, 104, 105, 106, 107, 108, 109, 110];
KEY_BACKSPACE: word = 14; //Backspace
KEY_SPACE: word = 57; //Space
KEY_ENTER: word = 28; //Enter
KeyName: array [0..248] of string =
('RESERVED', 'ESC', '1', '2', '3', '4', '5', '6', '7',
'8', '9', '0', 'MINUS', 'EQUAL', 'BACKSPACE',
'TAB', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
'O', 'P', 'LEFTBRACE', 'RIGHTBRACE', 'ENTER', 'LEFTCTRL',
'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'SEMICOLON',
'APOSTROPHE', 'GRAVE', 'LEFTSHIFT', 'BACKSLASH', 'Z', 'X',
'C', 'V', 'B', 'N', 'M', 'COMMA', 'DOT', 'SLASH',
'RIGHTSHIFT', 'KPASTERISK', 'LEFTALT',
'SPACE', 'CAPSLOCK', 'F1', 'F2', 'F3', 'F4', 'F5',
'F6', 'F7', 'F8', 'F9', 'F10', 'NUMLOCK', 'SCROLLLOCK',
'KP7', 'KP8', 'KP9', 'KPMINUS', 'KP4', 'KP5', 'KP6', 'KPPLUS', 'KP1',
'KP2', 'KP3', 'KP0', 'KPDOT', '(84)', 'ZENKAKUHANKAKU', '102ND',
'F11', 'F12', 'RO', 'KATAKANA', 'HIRAGANA', 'HENKAN',
'KATAKANAHIRAGANA', 'MUHENKAN', 'KPJPCOMMA', 'KPENTER',
'RIGHTCTRL', 'KPSLASH', 'SYSRQ', 'RIGHTALT', 'LINEFEED', 'HOME',
'UP', 'PAGEUP', 'LEFT', 'RIGHT', 'END', 'DOWN', 'PAGEDOWN',
'INSERT', 'DELETE', 'MACRO', 'MUTE', 'VOLUMEDOWN', 'VOLUMEUP',
'POWER', 'KPEQUAL', 'KPPLUSMINUS', 'PAUSE', 'SCALE', 'KPCOMMA',
'HANGEUL', 'HANJA', 'YEN', 'LEFTMETA', 'RIGHTMETA', 'COMPOSE',
'STOP', 'AGAIN', 'PROPS', 'UNDO', 'FRONT', 'COPY', 'OPEN',
'PASTE', 'FIND', 'CUT', 'HELP', 'MENU', 'CALC', 'SETUP', 'SLEEP',
'WAKEUP', 'FILE', 'SENDFILE', 'DELETEFILE', 'XFER', 'PROG1',
'PROG2', 'WWW', 'MSDOS', 'COFFEE', 'ROTATE_DISPLAY', 'CYCLEWINDOWS',
'MAIL', 'BOOKMARKS', 'COMPUTER', 'BACK', 'FORWARD', 'CLOSECD',
'EJECTCD', 'EJECTCLOSECD', 'NEXTSONG', 'PLAYPAUSE', 'PREVIOUSSONG',
'STOPCD', 'RECORD', 'REWIND', 'PHONE', 'ISO', 'CONFIG', 'HOMEPAGE',
'REFRESH', 'EXIT', 'MOVE', 'EDIT', 'SCROLLUP', 'SCROLLDOWN',
'KPLEFTPAREN', 'KPRIGHTPAREN', 'NEW', 'REDO', 'F13', 'F14', 'F15',
'F16', 'F17', 'F18', 'F19', 'F20', 'F21', 'F22', 'F23', 'F24',
'(195)', '(196)', '(197)', '(198)', '(199)', 'PLAYCD', 'PAUSECD',
'PROG3', 'PROG4', 'ALL_APPLICATIONS', 'SUSPEND', 'CLOSE', 'PLAY',
'FASTFORWARD', 'BASSBOOST', 'PRINT', 'HP', 'CAMERA', 'SOUND',
'QUESTION', 'EMAIL', 'CHAT', 'SEARCH', 'CONNECT', 'FINANCE',
'SPORT', 'SHOP', 'ALTERASE', 'CANCEL', 'BRIGHTNESSDOWN', 'BRIGHTNESSUP',
'MEDIA', 'SWITCHVIDEOMODE', 'KBDILLUMTOGGLE', 'KBDILLUMDOWN',
'KBDILLUMUP', 'SEND', 'REPLY', 'FORWARDMAIL', 'SAVE', 'DOCUMENTS',
'BATTERY', 'BLUETOOTH', 'WLAN', 'UWB', 'UNKNOWN', 'VIDEO_NEXT',
'VIDEO_PREV', 'BRIGHTNESS_CYCLE', 'BRIGHTNESS_AUTO', 'DISPLAY_OFF',
'WWAN', 'RFKILL', 'MICMUTE');
var
DaemonMode: boolean = True;
AppEventLog: TEventLog = nil;
E: Exception;
Key_RPL: word;
Keys_LS: array of word = nil;
StrKeys_LS: string = '';
NeedTrackMouse: boolean = False;
NeedClearKeyBuf: boolean = False;
KeyBuf: TKeyBuf;
BufferAction: TBufferAction = KeepBuffer;
StopAndExit: boolean = False;
procedure Log(EventType: TEventType; aMessage: string; StdOutputOnly: boolean);
begin
if DaemonMode then
begin
if not StdOutputOnly then
AppEventLog.Log(EventType, aMessage);
end
else
begin
if StdOutputOnly then
writeln(aMessage)
else
begin
writeln(aMessage);
AppEventLog.Log(EventType, aMessage);
end;
end;
end;
procedure RunInstall();
var
UnitFile: TIniFile = nil;
begin
DaemonMode := False;
try
Log(etInfo, 'Installing Easy Switcher daemon...', False);
UnitFile := TIniFile.Create(SYSTEMD_UNIT_FILE, []);
UnitFile.WriteString('Unit', 'Description',
'Easy Switcher - keyboard layout switcher');
UnitFile.WriteString('Unit', 'Requires', 'local-fs.target');
UnitFile.WriteString('Unit', 'After', 'local-fs.target');
UnitFile.WriteString('Unit', 'StartLimitIntervalSec', '10');
UnitFile.WriteString('Unit', 'StartLimitBurst', '3');
UnitFile.WriteString('Service', 'Type', 'simple');
UnitFile.WriteString('Service', 'ExecStart', ParamStr(0) + ' -r');
UnitFile.WriteString('Service', '#User', 'easy-switcher');
UnitFile.WriteString('Service', 'Restart', 'on-failure');
UnitFile.WriteString('Service', 'RestartSec', '3');
UnitFile.WriteString('Install', 'WantedBy', 'sysinit.target ');
Log(etInfo, Format('Easy Switcher daemon successfully installed, version: %s',
[EASY_SWITCHER_VERSION]), False);
if Assigned(UnitFile) then
FreeAndNil(UnitFile);
except
on E: Exception do
begin
Log(etError, Format('Error creating systemd control file. %s. Are you root?',
[E.Message]), False);
if Assigned(UnitFile) then
FreeAndNil(UnitFile);
end;
end;
end;
procedure RunUninstall();
begin
DaemonMode := False;
Log(etInfo, 'Uninstalling Easy Switcher daemon...', False);
if FileExists(SYSTEMD_UNIT_FILE) then
if DeleteFile(SYSTEMD_UNIT_FILE) then
Log(etInfo, 'Easy Switcher daemon is successfully uninstalled.', False)
else
Log(etError, Format('Error removing systemd control file %s. Are you root?',
[SYSTEMD_UNIT_FILE]), False)
else
Log(etError, Format('Nothing to uninstall. Unit file not found %s.',
[SYSTEMD_UNIT_FILE]), False);
end;
function KeyboardDetectThread(ptr: Pointer): ptrint;
var
KeyboardPath: string = '';
KeyboardFD: longint = -1;
KeyIE: input_event;
ioRes: int64 = -1;
i: integer = 0;
begin
KeyIE := Default(input_event);
KeyboardPath := KeyboardDetectInfo(ptr^).Path;
KeyboardFD := fpOpen(KeyboardPath, O_RDONLY);
if KeyboardFD <> -1 then
begin
while i < 5700 do //waiting a lil bit less than 60 seconds
begin
ioRes := fpRead(KeyboardFD, KeyIE, SizeOf(KeyIE));
if (ioRes = SizeOf(KeyIE)) then
begin
if ((KeyIE.ie_type = 1) and (KeyIE.code = KEY_ENTER) and
(KeyIE.Value in [0, 1, 2])) then
begin
KeyboardDetectInfo(ptr^).active := True;
break;
end;
end;
sleep(10);
end;
FpClose(KeyboardFD);
end;
Result := 0;
end;
procedure RunConfig();
var
ConfigIniFile: TIniFile = nil; //TInifile to read config
Config: TStringList = nil;
//TStringList to save config, instead of TInifile to preserve #comments
KeyboardPath: string = '';
MousePath: string = '/dev/input/mice';
ReverseMode: boolean = False;
Delay: integer = 10;
SRec: TSearchRec;
KeyboardList: TKeyboardList;
i: integer = 0;
k: integer = 0;
KeyboardFD: longint = -1;
ioRes: int64 = -1;
KeyIE: input_event;
begin
DaemonMode := False;
KeyboardList := Default(TKeyboardList);
SRec := Default(TSearchRec);
KeyIE := Default(input_event);
Log(etInfo, 'Easy Switcher keyboard configuration started.', False);
Log(etInfo, 'Trying to read existing config file...', True);
if ForceDirectories(ExtractFileDir(CONFIG_FILE)) then
begin
try
ConfigIniFile := TIniFile.Create(CONFIG_FILE, [ifoStripQuotes]);
MousePath := ConfigIniFile.ReadString('Easy Switcher', 'mouse',
'/dev/input/mice');
ReverseMode := StrToBool(ConfigIniFile.ReadString('Easy Switcher',
'reverse-mode', 'False'));
Delay := ConfigIniFile.ReadInteger('Easy Switcher', 'delay', 10);
Log(etInfo, 'Done.', True);
if Assigned(ConfigIniFile) then
FreeAndNil(ConfigIniFile);
except
on E: Exception do
begin
Log(etInfo, Format(
'Error reading config file, Easy Switcher will create new one. %s',
[E.Message]), False);
if Assigned(ConfigIniFile) then
FreeAndNil(ConfigIniFile);
end;
end;
Log(etInfo, '', True);
Log(etInfo, 'Easy Switcher will try to detect your keyboard automatically.', True);
sleep(100);
if FindFirst(INPUT_DEVICES_DIR + 'event*', faSysFile, SRec) = 0 then
begin
repeat
with SRec do
begin
if (fpOpen((INPUT_DEVICES_DIR + Name), O_RDONLY or O_NONBLOCK) = -1) then
continue;
SetLength(KeyboardList, Length(KeyboardList) + 1);
KeyboardList[i].id := i;
KeyboardList[i].Active := False;
KeyboardList[i].path := INPUT_DEVICES_DIR + Name;
Inc(i);
end;
until FindNext(SRec) <> 0;
FindClose(SRec);
end;
if Length(KeyboardList) > 0 then
begin
Log(etInfo, 'Please press ENTER...', True);
for i := 0 to Length(KeyboardList) - 1 do
begin
BeginThread(@KeyboardDetectThread, @(KeyboardList[i]));
end;
i := 0;
k := 0;
for k := 0 to 600 do //waiting for about 60 seconds
begin
sleep(100);
for i := 0 to Length(KeyboardList) - 1 do
begin
if KeyboardList[i].Active then
begin
KeyboardPath := KeyboardList[i].path;
break;
end;
end;
if KeyboardPath <> '' then
break;
end;
if KeyboardPath <> '' then
begin
Log(etInfo, Format('Found keyboard at %s', [KeyboardPath]), True);
Log(etInfo, '', True);
Sleep(500);
KeyboardFD := fpOpen(KeyboardPath, O_RDONLY or O_SYNC);
if KeyboardFD <> -1 then
begin
Log(etInfo,
'Press the key or combination of keys that changes layout in your system.',
True);
Log(etInfo, 'Waiting for your input...', True);
i := 0;
while i < 6000 do
begin
ioRes := 0;
ioRes := fpRead(KeyboardFD, KeyIE, SizeOf(KeyIE));
if (ioRes = SizeOf(KeyIE)) then
begin
if ((KeyIE.ie_type = EV_KEY) and (KeyIE.Value in [0, 1])) then
begin
SetLength(Keys_LS, Length(Keys_LS) + 1);
Keys_LS[Length(Keys_LS) - 1] := KeyIE.code;
if Length(Keys_LS) = 2 then
begin
if KeyIE.Value = 0 then
begin
StrKeys_LS := IntToStr(Keys_LS[0]);
end
else
begin
StrKeys_LS := Format('%d+%d', [Keys_LS[0], Keys_LS[1]]);
end;
break;
end;
end;
end;
sleep(10);
Inc(i);
end;
if Length(Keys_LS) <> 0 then
begin
if SScanf(StrKeys_LS, '%d+%d', [@Keys_LS[0], @Keys_LS[1]]) = 1 then
begin
Log(etInfo, Format('Key %s captured', [KeyName[Keys_LS[0]]]), True);
Log(etInfo, '', True);
end
else
begin
Log(etInfo, Format('Key combination %s+%s captured',
[KeyName[Keys_LS[0]], KeyName[Keys_LS[1]]]), True);
Log(etInfo, '', True);
end;
end
else
begin
Log(etError, 'Error reading the keyboard.', False);
Halt(1);
end;
sleep(500);
fpClose(KeyboardFD);
KeyboardFD := fpOpen(KeyboardPath, O_RDONLY or O_SYNC);
Log(etInfo,
'Press the key you will use to correct the text you have entered.',
True);
Log(etInfo, 'Waiting for your input...', True);
i := 0;
while i < 6000 do
begin
ioRes := 0;
ioRes := fpRead(KeyboardFD, KeyIE, SizeOf(KeyIE));
if (ioRes = SizeOf(KeyIE)) then
begin
if ((KeyIE.ie_type = 1) and (KeyIE.Value = 1)) then
begin
Key_RPL := KeyIE.code;
break;
end;
end;
sleep(10);
Inc(i);
end;
if Key_RPL <> -1 then
begin
Log(etInfo, Format('Key %s captured', [KeyName[Key_RPL]]), True);
Log(etInfo, '', True);
end
else
begin
Log(etError, 'Error reading the keyboard.', False);
Halt(1);
end;
FpClose(KeyboardFD);
sleep(500);
//flush terminal buffer
ioRes := fpIOCtl(StdInputHandle, TCFLSH, pointer(Ord(TCIFLUSH)));
Log(etInfo, 'Writing configuration file...', True);
try
Config := TStringList.Create;
Config.Add('[Easy Switcher]');
Config.Add('# This is Easy Switcher config file.');
Config.Add('');
Config.Add('# Keyboard device path.');
Config.Add(
'# Run ''~$ hwinfo --keyboard --short'' to get the list of your keyboard devices.');
Config.Add('# keyboard="/dev/input/event2"');
Config.Add('');
Config.Add('keyboard="' + KeyboardPath + '"');
Config.Add('');
Config.Add('');
Config.Add('# Mouse device path.');
Config.Add(
'# Run ''~$ hwinfo --mouse --short'' to get the list of your mouse devices.');
Config.Add('# mouse="/dev/input/mice"');
Config.Add('');
Config.Add('mouse="' + MousePath + '"');
Config.Add('');
Config.Add('');
Config.Add('# Scancode of the key or combination of keys used to');
Config.Add('# switch the layout in your system.');
Config.Add('# Run ''~$ sudo showkey'' to find out your key scancodes.');
Config.Add('# layout-switch-key=125');
Config.Add('# layout-switch-key=29+42');
Config.Add('');
Config.Add('layout-switch-key=' + StrKeys_LS);
Config.Add('');
Config.Add('');
Config.Add('# Scancode of the key to correct the text you have entered.');
Config.Add('# Key combinations are not supported.');
Config.Add('# PAUSE/BREAK key is used by default.');
Config.Add('# Run ''~$ sudo showkey'' to find out your key scancodes.');
Config.Add('# replace-key=119');
Config.Add('');
Config.Add('replace-key=' + IntToStr(Key_RPL));
Config.Add('');
Config.Add('');
Config.Add('# If reverse-mode is false, pressing <replace-key> corrects');
Config.Add(
'# only last word you have entered. Pressing Shift + <replace-key> corrects');
Config.Add('# the whole phrase.');
Config.Add('# If reverse-mode is true, pressing <replace-key> corrects');
Config.Add(
'# the whole phrase you have entered, and Shift + <replace-key> corrects');
Config.Add('# only the last word.');
Config.Add('# Default reverse-mode value is false');
Config.Add('# reverse-mode=false');
Config.Add('');
Config.Add('reverse-mode=' + BoolToStr(ReverseMode, True) + '');
Config.Add('');
Config.Add('');
Config.Add(
'# Easy Switcher uses a delay to wait for your system to process the actions.');
Config.Add('# The smaller delay is, the faster Easy Switcher works.');
Config.Add('# However, your desktop environment may not be able to handle');
Config.Add(
'# Easy Switcher output in a timely manner and you will get errors.');
Config.Add('# Try to increase the delay if you get messy output.');
Config.Add('# Default delay value is 10');
Config.Add('# delay=10');
Config.Add('');
Config.Add('delay=' + IntToStr(Delay));
Config.SaveToFile(CONFIG_FILE);
Log(etInfo, 'Keyboard configuration successfully saved.', False);
Log(etInfo, Format('See %s to edit additional parameters.',
[CONFIG_FILE]), False);
if Assigned(Config) then
FreeAndNil(Config);
except
on E: Exception do
begin
Log(etError, Format('Error writing configuration file %s %s',
[CONFIG_FILE, StrError(errno)]), False);
if Assigned(Config) then
FreeAndNil(Config);
end;
end;
end
else
begin
Log(etError, 'Error attaching to keyboard.', False);
Halt(1);
end;
end
else
begin
Log(etError, 'Couldn''t capture your keypress. Are you root?', False);
Halt(1);
end;
end
else
begin
Log(etError, 'No input devices found. Are you root?', False);
Halt(1);
end;
end
else
begin
Log(etError, Format('Cannot create directory %s',
[ExtractFilePath(CONFIG_FILE)]), False);
Halt(1);
end;
end;
procedure SignalHandler(aSignal: longint); cdecl;
begin
case aSignal of
SIGTERM, SIGQUIT, SIGINT, SIGHUP:
begin
Log(etInfo, Format('Got signal to exit (%d). Bye.', [aSignal]), False);
StopAndExit := True;
end;
end;
end;
function TrackMouseThread(PMouseFD: pointer): ptrint;
var
MouseData: array [0..2] of byte = (0, 0, 0);
LeftBtn, MiddleBtn, RightBtn: integer;
ioRes: int64 = -1;
begin
while not StopAndExit do
begin
ioRes := fpRead(longint(PMouseFD), MouseData, SizeOf(MouseData));
if NeedTrackMouse then
begin
if ioRes = SizeOf(MouseData) then
begin
LeftBtn := MouseData[0] and $1;
RightBtn := MouseData[0] and $2;
MiddleBtn := MouseData[0] and $4;
if (LeftBtn > 0) or (RightBtn > 0) or (MiddleBtn > 0) then
begin
Log(etInfo, 'mouse click', True);
Log(etInfo, 'buffer clearing queued', True);
NeedTrackMouse := False;
NeedClearKeyBuf := True;
end;
end;
end;
end;
Result := 0;
end;
procedure Run();
var
i: integer = 0;
NewAct, OldAct: SigactionRec;
ConfigIniFile: TIniFile = nil;
KeyboardPath: string = '';
MousePath: string = '';
ReverseMode: boolean = False;
Delay: integer = 10;
ioRes: int64 = -1;
KeyboardFD: longint = -1;
vKeyboardFD: longint = -1;
MouseFD: longint = -1;
vKeyboardSetup: uinput_setup;
KeyIE: input_event;
KeyAction: array [0..2] of string = ('up', 'down', 'autorepeat');
function GetBufferAction(): TBufferAction;
var
Last: integer = -1;
begin
Last := Length(KeyBuf) - 1;
if Length(KeyBuf) < 2 then Exit(KeepBuffer);
if Length(KeyBuf) < 4 then
if (KeyBuf[Last].code = Key_RPL) and (KeyBuf[Last].Value = 0) and
(KeyBuf[Last - 1].code = Key_RPL) and (KeyBuf[Last - 1].Value = 1) then
Exit(ReplaceWord)
else
Exit(KeepBuffer);
if (KeyBuf[Last].code = Key_RPL) and (KeyBuf[Last].Value = 0) and
(KeyBuf[Last - 1].code in Shifts) and (KeyBuf[Last - 1].Value = 0) and
(KeyBuf[Last - 2].code = Key_RPL) and (KeyBuf[Last - 2].Value = 1) and
(KeyBuf[Last - 3].code in Shifts) and (KeyBuf[Last - 3].Value = 1) then
Exit(ReplaceAll) //shiftd rpld shiftu rplu
else
if (KeyBuf[Last].code = Key_RPL) and (KeyBuf[Last].Value = 0) and
(KeyBuf[Last - 1].code = Key_RPL) and (KeyBuf[Last - 1].Value = 1) then
if (KeyBuf[Last - 2].code in Shifts) and (KeyBuf[Last - 2].Value = 1) then
Exit(ReplaceAll) //shiftd rpld rplu
else
Exit(ReplaceWord); //rpld rplu
Result := KeepBuffer;
end;
function GetBufferStr(): string;
var
i: integer;
begin
Result := '';
for i := 0 to Length(KeyBuf) - 1 do
Result := Result + Format('%s %s; ', [KeyName[KeyBuf[i].code],
KeyAction[KeyBuf[i].Value]]);
end;
procedure PrepareBuffer();
var
iBuf: array of input_event = nil;
oBuf: array of input_event = nil;
i: integer = 0;
k: integer = 0;
Last: integer = 0;
begin
//copy everything to iBuf and clear KeyBuf
for i := 0 to Length(KeyBuf) - 1 do
begin
SetLength(iBuf, i + 1);
iBuf[i] := KeyBuf[i];
end;
SetLength(KeyBuf, 0);
//get rid of replace keys
Last := Length(iBuf) - 1;
if (iBuf[Last].code = Key_RPL) and (iBuf[Last].Value = 0) and
(iBuf[Last - 1].code in Shifts) and (iBuf[Last - 1].Value = 0) and
(iBuf[Last - 2].code = Key_RPL) and (iBuf[Last - 2].Value = 1) and
(iBuf[Last - 3].code in Shifts) and (iBuf[Last - 3].Value = 1) then
Last := Last - 4
else if (iBuf[Last].code = Key_RPL) and (iBuf[Last].Value = 0) and
(iBuf[Last - 1].code = Key_RPL) and (iBuf[Last - 1].Value = 1) then
if (iBuf[Last - 2].code in Shifts) and (iBuf[Last - 2].Value = 1) then
Last := Last - 3
else
Last := Last - 2;
for i := 0 to Last do
begin
SetLength(oBuf, i + 1);
oBuf[i] := iBuf[i];
end;
SetLength(iBuf, 0);
for i := 0 to Length(oBuf) - 1 do
begin
SetLength(iBuf, i + 1);
iBuf[i] := oBuf[i];
end;
SetLength(oBuf, 0);
//cut of last line only
k := 0;
for i := 0 to Length(iBuf) - 1 do
begin
if (iBuf[i].code = KEY_ENTER) and (iBuf[i].Value = 0) and
(i <> Length(iBuf) - 1) then
begin
k := 0;
SetLength(oBuf, k);
end
else
begin
SetLength(oBuf, k + 1);
oBuf[k] := iBuf[i];
k += 1;
end;
end;
SetLength(iBuf, 0);
for i := 0 to Length(oBuf) - 1 do
begin
SetLength(iBuf, i + 1);
iBuf[i] := oBuf[i];
end;
SetLength(oBuf, 0);
//get rid of shiftdown-shiftup
k := 0;
for i := 0 to Length(iBuf) - 1 do
begin
if (iBuf[i].code in Shifts) and (k > 0) then
begin
if (oBuf[k - 1].code in Shifts) then
begin
SetLength(oBuf, k - 1);
k -= 1;
end
else
begin
SetLength(oBuf, k + 1);
oBuf[k] := iBuf[i];
k += 1;
end;
end
else
begin
SetLength(oBuf, k + 1);
oBuf[k] := iBuf[i];
k += 1;
end;
end;
SetLength(iBuf, 0);
for i := 0 to Length(oBuf) - 1 do
begin
SetLength(iBuf, i + 1);
iBuf[i] := oBuf[i];
end;
SetLength(oBuf, 0);
//get rid of BS if any
k := 0;
for i := 0 to Length(iBuf) - 1 do
begin
if (iBuf[i].code = KEY_BACKSPACE) then
begin
if k = 0 then
continue //leading
else
begin
k -= 1;
if oBuf[k].code in Shifts then
oBuf[k - 1] := oBuf[k];
SetLength(oBuf, k); //inline
end;
end
else
begin
SetLength(oBuf, k + 1);
oBuf[k] := iBuf[i];
k += 1;
end;
end;
//fill in prepared buffer back
for i := 0 to Length(oBuf) - 1 do
begin
SetLength(KeyBuf, i + 1);
KeyBuf[i] := oBuf[i];
end;
sleep(10);
end;
procedure Convert(SingleWord: boolean);
var
EmitBuf: TEmitBuf; //static array to emit keys with key+syn
IEBuf: array of input_event = nil; //output buffer
n: integer = 0;
k: integer = 0;
s: integer = 0;
IETime: timeval;
begin
EmitBuf := Default(TEmitBuf);
IETime := Default(timeval);
clock_gettime(0, @IETime); //emulating time to preserve key order
IETime.tv_usec := 0;
SetLength(IEBuf, 0);
if SingleWord then
begin
for n := 0 to Length(KeyBuf) - 1 do
begin
if (KeyBuf[n].Value = 0) and (KeyBuf[n].code = KEY_SPACE) and
(n <> Length(KeyBuf) - 1) then
begin
s := n + 1; //set the conversion limit by SPACE UP
end;
end;
end;
for n := s to Length(KeyBuf) - 1 do
if (KeyBuf[n].Value in [1, 2]) and (not (KeyBuf[n].code in Shifts)) then
begin
k := Length(IEBuf); //BS down
SetLength(IEBuf, k + 1);
IEBuf[k].ie_type := EV_KEY;
IEBuf[k].code := KEY_BACKSPACE;
IEBuf[k].Value := 1;
IEBuf[k].time.tv_sec := IETime.tv_sec;
IEBuf[k].time.tv_usec := IETime.tv_usec;
IETime.tv_usec := IETime.tv_usec + 200;
k := Length(IEBuf); //BS up
SetLength(IEBuf, k + 1);
IEBuf[k].ie_type := EV_KEY;
IEBuf[k].code := KEY_BACKSPACE;
IEBuf[k].Value := 0;
IEBuf[k].time.tv_sec := IETime.tv_sec;
IEBuf[k].time.tv_usec := IETime.tv_usec;
IETime.tv_usec := IETime.tv_usec + 200;
end;
k := Length(IEBuf); //layout change down
SetLength(IEBuf, k + 1);
IEBuf[k].ie_type := EV_KEY;
IEBuf[k].code := Keys_LS[0];
IEBuf[k].Value := 1;
IEBuf[k].time.tv_sec := IETime.tv_sec;
IEBuf[k].time.tv_usec := IETime.tv_usec;
IETime.tv_usec := IETime.tv_usec + 200;
if Length(Keys_LS) = 2 then
begin
k := Length(IEBuf); //layout change down if combination
SetLength(IEBuf, k + 1);
IEBuf[k].ie_type := EV_KEY;
IEBuf[k].code := Keys_LS[1];
IEBuf[k].Value := 1;
IEBuf[k].time.tv_sec := IETime.tv_sec;
IEBuf[k].time.tv_usec := IETime.tv_usec;
IETime.tv_usec := IETime.tv_usec + 200;
k := Length(IEBuf); //layout change up if combination
SetLength(IEBuf, k + 1);
IEBuf[k].ie_type := EV_KEY;
IEBuf[k].code := Keys_LS[1];
IEBuf[k].Value := 0;
IEBuf[k].time.tv_sec := IETime.tv_sec;
IEBuf[k].time.tv_usec := IETime.tv_usec;
IETime.tv_usec := IETime.tv_usec + 200;
end;
k := Length(IEBuf); //layout change up
SetLength(IEBuf, k + 1);
IEBuf[k].ie_type := EV_KEY;
IEBuf[k].code := Keys_LS[0];
IEBuf[k].Value := 0;
IEBuf[k].time.tv_sec := IETime.tv_sec;
IEBuf[k].time.tv_usec := IETime.tv_usec;
IETime.tv_usec := IETime.tv_usec + 200;
//writing to the intermediate buffer
for n := s to Length(KeyBuf) - 1 do
begin
k := Length(IEBuf); //key
SetLength(IEBuf, k + 1);
IEBuf[k].ie_type := EV_KEY;
IEBuf[k].code := KeyBuf[n].code;
IEBuf[k].Value := KeyBuf[n].Value;
IEBuf[k].time.tv_sec := IETime.tv_sec;
IEBuf[k].time.tv_usec := IETime.tv_usec;
IETime.tv_usec := IETime.tv_usec + 200;
end;
//intermediate buffer ready, emitting
for n := 0 to Length(IEBuf) - 1 do
begin
EmitBuf[1] := IEBuf[n];
EmitBuf[2].ie_type := EV_SYN;
EmitBuf[2].code := SYN_REPORT;
EmitBuf[2].Value := 0;
EmitBuf[2].time.tv_sec := IEBuf[n].time.tv_sec;
EmitBuf[2].time.tv_usec := IEBuf[n].time.tv_usec + 100;
fpWrite(vKeyboardFD, EmitBuf[1], sizeof(EmitBuf[1]) * 2);
Log(etInfo, Format('output %s %s', [KeyName[EmitBuf[1].code],
KeyAction[EmitBuf[1].Value]]), True);
Sleep(Delay);
end;
end;
begin
if DaemonMode then
Log(etInfo, Format('Starting Easy Switcher v%s...',
[EASY_SWITCHER_VERSION]), False)
else
Log(etInfo, Format('Starting Easy Switcher v%s in debug mode...',
[EASY_SWITCHER_VERSION]), False);
//Init variables
NewAct := Default(SigactionRec);
OldAct := Default(SigactionRec);
KeyIE := Default(input_event);
KeyBuf := Default(TKeyBuf);
SetLength(Keys_LS, 2);
vKeyboardSetup := Default(uinput_setup);
vKeyboardSetup.id.bustype := BUS_USB;
vKeyboardSetup.id.vendor := $0777;
vKeyboardSetup.id.product := $0777;
vKeyboardSetup.Name := 'Easy Switcher virtual input device';
//Set signal processing handlers
Log(etInfo, 'Setting up signal handlers...', True);
NewAct.sa_handler := SigactionHandler(@SignalHandler);
ioRes := fpSigaction(SIGHUP, @NewAct, @OldAct);
ioRes += fpSigaction(SIGINT, @NewAct, @OldAct);
ioRes += fpSigaction(SIGQUIT, @NewAct, @OldAct);
ioRes += fpSigaction(SIGTERM, @NewAct, @OldAct);
if ioRes <> 0 then
begin
Log(etError, 'Error setting up signal handlers.', False);
Halt(1);
end;
Log(etInfo, 'Done.', True);
ioRes := 0;
//read config
Log(etInfo, 'Reading config...', True);
if FileExists(CONFIG_FILE) then
begin
try
ConfigIniFile := TIniFile.Create(CONFIG_FILE, [ifoStripQuotes]);
KeyboardPath := ConfigIniFile.ReadString('Easy Switcher', 'keyboard', '~');
MousePath := ConfigIniFile.ReadString('Easy Switcher', 'mouse', '~');
StrKeys_LS := ConfigIniFile.ReadString('Easy Switcher',
'layout-switch-key', '-1');
Key_RPL := StrToUInt(ConfigIniFile.ReadString('Easy Switcher',
'replace-key', '-1'));
ReverseMode := StrToBool(ConfigIniFile.ReadString('Easy Switcher',
'reverse-mode', 'False'));
Delay := StrToInt(ConfigIniFile.ReadString('Easy Switcher', 'delay', '10'));
SetLength(Keys_LS, SScanf(StrKeys_LS, '%d+%d', [@Keys_LS[0], @Keys_LS[1]]));
if Assigned(ConfigIniFile) then
FreeAndNil(ConfigIniFile);
if ((KeyboardPath = '~') or (MousePath = '~') or (Length(Keys_LS) = 0) or
(KEY_RPL = -1)) then
begin
Log(etError, 'Error parsing config file.', False);
Halt(1);
end;
except
on E: Exception do
begin
Log(etInfo, Format('Error reading config file. %s', [E.Message]), False);
if Assigned(ConfigIniFile) then
FreeAndNil(ConfigIniFile);
Halt(1);
end;
end;
end
else
begin
Log(etError, Format(
'Missing config file %s, run ''easy-switcher -c'' to configure.',
[CONFIG_FILE]), False);
Halt(1);
end;
Log(etInfo, 'Done.', True);
//start keyboard reading
Log(etInfo, 'Opening keyboard...', True);
KeyboardFD := fpOpen(KeyboardPath, O_RDONLY or O_SYNC);
if KeyboardFD = -1 then
begin
Log(etError, Format('Cannot open %s %s', [KeyboardPath, StrError(errno)]), False);
Halt(1);
end;
Log(etInfo, 'Done.', True);
//install virtual keyboard
Log(etInfo, 'Installing virtual keyboard...', True);
vKeyboardFD := fpOpen(UINPUT_FILE, O_WRONLY or O_SYNC); // or O_NONBLOCK
if vKeyboardFD = -1 then
begin
Log(etError, Format('Cannot open %s %s', [UINPUT_FILE, StrError(errno)]), False);
Halt(1);
end;
ioRes += fpIOCtl(vKeyboardFD, UI_SET_EVBIT, Pointer(EV_SYN));
ioRes += fpIOCtl(vKeyboardFD, UI_SET_EVBIT, Pointer(EV_KEY));
for i := 0 to 248 do
iores += fpIOCtl(vKeyboardFD, UI_SET_KEYBIT, Pointer(i));