private void CreateConversionArray (KeyboardLayouts layouts, KeyboardLayout layout)
{
XEvent e2 = new XEvent ();
uint keysym = 0;
int [] ckey = new int [] { 0, 0, 0, 0 };
e2.KeyEvent.display = display;
e2.KeyEvent.state = 0;
for (int keyc = min_keycode; keyc <= max_keycode; keyc++) {
int vkey = 0;
int scan = 0;
e2.KeyEvent.keycode = keyc;
XKeySym t;
XLookupStatus status;
LookupString (ref e2, 0, out t, out status);
keysym = (uint) t;
if (keysym != 0) {
if ((keysym >> 8) == 0xFF) {
vkey = nonchar_key_vkey [keysym & 0xFF];
scan = nonchar_key_scan [keysym & 0xFF];
// Set extended bit
if ((scan & 0x100) != 0)
vkey |= 0x100;
} else if (keysym == 0x20) { // spacebar
vkey = (int) VirtualKeys.VK_SPACE;
scan = 0x39;
} else {
// Search layout dependent scancodes
int maxlen = 0;
int maxval = -1;;
for (int i = 0; i < syms; i++) {
keysym = XKeycodeToKeysym (display, keyc, i);
if ((keysym < 0x800) && (keysym != ' '))
ckey [i] = (sbyte) (keysym & 0xFF);
else
ckey [i] = (sbyte) MapDeadKeySym ((int) keysym);
}
for (int keyn = 0; keyn < layout.Keys.Length; keyn++) {
int ml = Math.Min (layout.Keys [keyn].Length, 4);
int ok = -1;
for (int i = 0; (ok != 0) && (i < ml); i++) {
sbyte ck = (sbyte) layout.Keys [keyn][i];
if (ck != ckey [i])
ok = 0;
if ((ok != 0) || (i > maxlen)) {
maxlen = i;
maxval = keyn;
}
if (ok != 0)
break;
}
}
if (maxval >= 0) {
if (maxval < layouts.scan_table [(int) layout.ScanIndex].Length)
scan = layouts.scan_table [(int) layout.ScanIndex][maxval];
if (maxval < layouts.vkey_table [(int) layout.VKeyIndex].Length)
vkey = layouts.vkey_table [(int) layout.VKeyIndex][maxval];
}
}
}
keyc2vkey [e2.KeyEvent.keycode] = vkey;
keyc2scan [e2.KeyEvent.keycode] = scan;
}
}
private KeyboardLayout DetectLayout (KeyboardLayouts layouts)
{
XDisplayKeycodes (display, out min_keycode, out max_keycode);
IntPtr ksp = XGetKeyboardMapping (display, (byte) min_keycode,
max_keycode + 1 - min_keycode, out keysyms_per_keycode);
lock (XlibLock) {
XplatUIX11.XFree (ksp);
}
syms = keysyms_per_keycode;
if (syms > 4) {
//Console.Error.WriteLine ("{0} keysymbols per a keycode is not supported, setting to 4", syms);
syms = 2;
}
IntPtr modmap_unmanaged;
XModifierKeymap xmk = new XModifierKeymap ();
modmap_unmanaged = XGetModifierMapping (display);
xmk = (XModifierKeymap) Marshal.PtrToStructure (modmap_unmanaged, typeof (XModifierKeymap));
int mmp = 0;
for (int i = 0; i < 8; i++) {
for (int j = 0; j < xmk.max_keypermod; j++, mmp++) {
byte b = Marshal.ReadByte (xmk.modifiermap, mmp);
if (b != 0) {
for (int k = 0; k < keysyms_per_keycode; k++) {
if ((int) XKeycodeToKeysym (display, b, k) == (int) MiscKeys.XK_Num_Lock)
NumLockMask = 1 << i;
}
}
}
}
XFreeModifiermap (modmap_unmanaged);
int [] ckey = new int [4];
KeyboardLayout layout = null;
int max_score = 0;
int max_seq = 0;
foreach (KeyboardLayout current in layouts.Layouts) {
int ok = 0;
int score = 0;
int match = 0;
int mismatch = 0;
int seq = 0;
int pkey = -1;
int key = min_keycode;
int i;
for (int keyc = min_keycode; keyc <= max_keycode; keyc++) {
for (i = 0; i < syms; i++) {
uint keysym = XKeycodeToKeysym (display, keyc, i);
if ((keysym < 0x800) && (keysym != ' ')) {
ckey [i] = (sbyte) (keysym & 0xFF);
} else {
ckey [i] = (sbyte) MapDeadKeySym ((int) keysym);
}
}
if (ckey [0] != 0) {
for (key = 0; key < current.Keys.Length; key++) {
int ml = Math.Min (syms, current.Keys [key].Length);
for (ok = 0, i = 0; (ok >= 0) && (i < ml); i++) {
sbyte ck = (sbyte) current.Keys [key][i];
if (ck != 0 && ck == ckey[i])
ok++;
if (ck != 0 && ck != ckey[i])
ok = -1;
}
if (ok > 0) {
score += ok;
break;
}
}
if (ok > 0) {
match++;
/* and how much the keycode order matches */
if (key > pkey)
seq++;
pkey = key;
} else {
/* print spaces instead of \0's */
mismatch++;
score -= syms;
}
}
}
if ((score > max_score) || ((score == max_score) && (seq > max_seq))) {
// best match so far
layout = current;
max_score = score;
max_seq = seq;
}
}
if (layout != null) {
return layout;
} else {
Console.WriteLine (Locale.GetText("Keyboard layout not recognized, using default layout: " +
layouts.Layouts [0].Name));
}
return layouts.Layouts [0];
}
public void EnsureLayoutInitialized ()
{
if (initialized)
return;
KeyboardLayouts layouts = new KeyboardLayouts ();
KeyboardLayout layout = DetectLayout (layouts);
lcid = layout.Lcid;
CreateConversionArray (layouts, layout);
SetupXIM ();
initialized = true;
}