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/* -*- mode:C; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* libFakeKey
*
* A simple library for converting utf8 chars into 'fake' keypresses.
*
* Uses ideas from Fontconfig, libvirtkeys.c, keysym2ucs.c and dasher.
*
* Authored By Matthew Allum <amllum@openedhand.com>
*
* Copyright (C) 2004 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <fakekey/fakekey.h>
#if HAVE_CONFIG_H
#include "config.h"
#endif
#if (WANT_DEBUG)
#define DBG(x, a...) \
fprintf (stderr, __FILE__ ":%d,%s() " x "\n", __LINE__, __func__, ##a)
#else
#define DBG(x, a...) do {} while (0)
#endif
#define MARK() DBG("mark")
#define N_MODIFIER_INDEXES (Mod5MapIndex + 1)
typedef unsigned int FkChar32;
struct FakeKey
{
Display *xdpy;
int min_keycode, max_keycode;
int n_keysyms_per_keycode;
KeySym *keysyms;
int held_keycode;
int held_state_flags;
KeyCode modifier_table[N_MODIFIER_INDEXES];
int shift_mod_index, alt_mod_index, meta_mod_index;
};
/* utf8_to_ucs4() Borrowed from fontconfig
*
* Converts the next Unicode char from src into dst and returns the
* number of bytes containing the char. src nust be at least len bytes
* long.
*/
static int
utf8_to_ucs4 (const unsigned char *src_orig,
FkChar32 *dst,
int len)
{
const unsigned char *src = src_orig;
unsigned char s;
int extra;
FkChar32 result;
if (len == 0)
return 0;
s = *src++;
len--;
if (!(s & 0x80))
{
result = s;
extra = 0;
}
else if (!(s & 0x40))
{
return -1;
}
else if (!(s & 0x20))
{
result = s & 0x1f;
extra = 1;
}
else if (!(s & 0x10))
{
result = s & 0xf;
extra = 2;
}
else if (!(s & 0x08))
{
result = s & 0x07;
extra = 3;
}
else if (!(s & 0x04))
{
result = s & 0x03;
extra = 4;
}
else if ( ! (s & 0x02))
{
result = s & 0x01;
extra = 5;
}
else
{
return -1;
}
if (extra > len)
return -1;
while (extra--)
{
result <<= 6;
s = *src++;
if ((s & 0xc0) != 0x80)
return -1;
result |= s & 0x3f;
}
*dst = result;
return src - src_orig;
}
FakeKey*
fakekey_init(Display *xdpy)
{
FakeKey *fk = NULL;
int event, error, major, minor;
XModifierKeymap *modifiers;
int mod_index;
int mod_key;
KeyCode *kp;
if (xdpy == NULL) return NULL;
if (!XTestQueryExtension(xdpy, &event, &error, &major, &minor))
{
return NULL;
}
fk = malloc(sizeof(FakeKey));
memset(fk,0,sizeof(FakeKey));
fk->xdpy = xdpy;
/* Find keycode limits */
XDisplayKeycodes(fk->xdpy, &fk->min_keycode, &fk->max_keycode);
/* Get the mapping */
/* TODO: Below needs to be kept in sync with anything else
* that may change the keyboard mapping.
*
* case MappingNotify:
* XRefreshKeyboardMapping(&ev.xmapping);
*
*/
fk->keysyms = XGetKeyboardMapping(fk->xdpy,
fk->min_keycode,
fk->max_keycode - fk->min_keycode + 1,
&fk->n_keysyms_per_keycode);
modifiers = XGetModifierMapping(fk->xdpy);
kp = modifiers->modifiermap;
for (mod_index = 0; mod_index < 8; mod_index++)
{
fk->modifier_table[mod_index] = 0;
for (mod_key = 0; mod_key < modifiers->max_keypermod; mod_key++)
{
int keycode = kp[mod_index * modifiers->max_keypermod + mod_key];
if (keycode != 0)
{
fk->modifier_table[mod_index] = keycode;
break;
}
}
}
for (mod_index = Mod1MapIndex; mod_index <= Mod5MapIndex; mod_index++)
{
if (fk->modifier_table[mod_index])
{
KeySym ks = XKeycodeToKeysym(fk->xdpy,
fk->modifier_table[mod_index], 0);
/*
* Note: ControlMapIndex is already defined by xlib
* ShiftMapIndex
*/
switch (ks)
{
case XK_Meta_R:
case XK_Meta_L:
fk->meta_mod_index = mod_index;
break;
case XK_Alt_R:
case XK_Alt_L:
fk->alt_mod_index = mod_index;
break;
case XK_Shift_R:
case XK_Shift_L:
fk->shift_mod_index = mod_index;
break;
}
}
}
if (modifiers)
XFreeModifiermap(modifiers);
return fk;
}
int
fakekey_reload_keysyms(FakeKey *fk)
{
if (fk->keysyms)
XFree(fk->keysyms);
fk->keysyms = XGetKeyboardMapping(fk->xdpy,
fk->min_keycode,
fk->max_keycode - fk->min_keycode + 1,
&fk->n_keysyms_per_keycode);
return 1;
}
int
fakekey_send_keyevent(FakeKey *fk,
KeyCode keycode,
Bool is_press,
int flags)
{
if (flags)
{
if (flags & FAKEKEYMOD_SHIFT)
XTestFakeKeyEvent(fk->xdpy, fk->modifier_table[ShiftMapIndex],
is_press, CurrentTime);
if (flags & FAKEKEYMOD_CONTROL)
XTestFakeKeyEvent(fk->xdpy, fk->modifier_table[ControlMapIndex],
is_press, CurrentTime);
if (flags & FAKEKEYMOD_ALT)
XTestFakeKeyEvent(fk->xdpy, fk->modifier_table[fk->alt_mod_index],
is_press, CurrentTime);
XSync(fk->xdpy, False);
}
XTestFakeKeyEvent(fk->xdpy, keycode, is_press, CurrentTime);
XSync(fk->xdpy, False);
return 1;
}
int
fakekey_press_keysym(FakeKey *fk,
KeySym keysym,
int flags)
{
static int modifiedkey;
KeyCode code = 0;
if ((code = XKeysymToKeycode(fk->xdpy, keysym)) != 0)
{
DBG("got keycode, no remap\n");
/* we already have a keycode for this keysym */
/* Does it need a shift key though ? */
if (XKeycodeToKeysym(fk->xdpy, code, 0) != keysym)
{
DBG("does not equal code for index o, needs shift?\n");
/* TODO: Assumes 1st modifier is shifted */
if (XKeycodeToKeysym(fk->xdpy, code, 1) == keysym)
flags |= FAKEKEYMOD_SHIFT; /* can get at it via shift */
else
code = 0; /* urg, some other modifier do it the heavy way */
}
else
{
/* the keysym is unshifted; clear the shift flag if it is set */
flags &= ~FAKEKEYMOD_SHIFT;
}
}
if (!code)
{
int index;
DBG("remapping kbd to get code\n");
/* Change one of the last 10 keysyms to our converted utf8,
* remapping the x keyboard on the fly.
*
* This make assumption the last 10 arn't already used.
* TODO: probably safer to check for this.
*/
modifiedkey = (modifiedkey+1) % 10;
/* Point at the end of keysyms, modifier 0 */
index = (fk->max_keycode - fk->min_keycode - modifiedkey - 1) * fk->n_keysyms_per_keycode;
fk->keysyms[index] = keysym;
XChangeKeyboardMapping(fk->xdpy,
fk->min_keycode,
fk->n_keysyms_per_keycode,
fk->keysyms,
(fk->max_keycode-fk->min_keycode));
XSync(fk->xdpy, False);
/* From dasher src;
* There's no way whatsoever that this could ever possibly
* be guaranteed to work (ever), but it does.
*
*/
code = fk->max_keycode - modifiedkey - 1;
/* The below is lightly safer;
*
* code = XKeysymToKeycode(fk->xdpy, keysym);
*
* but this appears to break in that the new mapping is not immediatly
* put to work. It would seem a MappingNotify event is needed so
* Xlib can do some changes internally ? ( xlib is doing something
* related to above ? )
*
* Probably better to try and grab the mapping notify *here* ?
*/
if (XKeycodeToKeysym(fk->xdpy, code, 0) != keysym)
{
DBG("does not equal code for index 0, needs shift?\n");
/* TODO: Assumes 1st modifier is shifted */
if (XKeycodeToKeysym(fk->xdpy, code, 1) == keysym)
flags |= FAKEKEYMOD_SHIFT; /* can get at it via shift */
else
DBG("attempted to add keycode to keymap but seem to have failed");
}
}
if (code != 0)
{
fakekey_send_keyevent(fk, code, True, flags);
fk->held_state_flags = flags;
fk->held_keycode = code;
return 1;
}
fk->held_state_flags = 0;
fk->held_keycode = 0;
return 0; /* failed */
}
int
fakekey_press(FakeKey *fk,
const unsigned char *utf8_char_in,
int len_bytes,
int flags)
{
FkChar32 ucs4_out;
if (fk->held_keycode) /* key is already held down */
return 0;
/* TODO: check for Return key here and other chars */
if (len_bytes < 0)
{
/*
unsigned char *p = utf8_char_in;
while (*p != '\0') { len_bytes++; p++; }
*/
len_bytes = strlen(utf8_char_in); /* OK ? */
}
if (utf8_to_ucs4 (utf8_char_in, &ucs4_out, len_bytes) < 1)
{
DBG("failed with %i. len is %i\n",
utf8_to_ucs4 (utf8_char_in, &ucs4_out, len_bytes), len_bytes);
return 0;
}
/* first check for Latin-1 characters (1:1 mapping)
if ((keysym >= 0x0020 && keysym <= 0x007e) ||
(keysym >= 0x00a0 && keysym <= 0x00ff))
return keysym;
*/
if (ucs4_out > 0x00ff) /* < 0xff assume Latin-1 1:1 mapping */
ucs4_out = ucs4_out | 0x01000000; /* This gives us the magic X keysym */
return fakekey_press_keysym(fk, (KeySym)ucs4_out, flags);
}
void
fakekey_repeat(FakeKey *fk)
{
if (!fk->held_keycode)
return;
fakekey_send_keyevent(fk, fk->held_keycode, True, fk->held_state_flags);
}
void
fakekey_release(FakeKey *fk)
{
if (!fk->held_keycode)
return;
fakekey_send_keyevent(fk, fk->held_keycode, False, fk->held_state_flags);
fk->held_state_flags = 0;
fk->held_keycode = 0;
}
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