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xkeymap.c
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xkeymap.c
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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
User interface services - X keyboard mapping
Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
Copyright 2003-2008 Peter Astrand <astrand@cendio.se> for Cendio AB
Copyright 2014-2017 Henrik Andersson <hean01@cendio.se> for Cendio AB
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/>.
*/
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <ctype.h>
#include <limits.h>
#include <time.h>
#include <string.h>
#include <assert.h>
#include "rdesktop.h"
#include "scancodes.h"
#define KEYMAP_SIZE 0x7f+1
#define KEYMAP_MASK 0x7f
#define KEYMAP_MAX_LINE_LENGTH 80
extern Display *g_display;
extern Window g_wnd;
extern char g_keymapname[16];
extern unsigned int g_keylayout;
extern int g_keyboard_type;
extern int g_keyboard_subtype;
extern int g_keyboard_functionkeys;
extern int g_win_button_size;
extern RD_BOOL g_enable_compose;
extern RD_BOOL g_seamless_rdp;
extern RD_BOOL g_seamless_active;
extern RDP_VERSION g_rdp_version;
extern RD_BOOL g_numlock_sync;
static RD_BOOL keymap_loaded;
static key_translation_entry *keymap[KEYMAP_SIZE];
static KeySym keypress_keysyms[256];
static int min_keycode;
static uint16 remote_modifier_state = 0;
static uint16 saved_remote_modifier_state = 0;
static void update_modifier_state(uint8 scancode, RD_BOOL pressed);
/* Free key_translation structure, including linked list */
static void
free_key_translation(key_translation * ptr)
{
key_translation *next;
while (ptr)
{
next = ptr->next;
xfree(ptr);
ptr = next;
}
}
/* Free the key_translation_entry for a given keysym and remove from the table */
static void
delete_key_translation_entry(KeySym keysym)
{
uint32 hash;
key_translation_entry *ptr;
key_translation_entry *next;
key_translation_entry *prev;
key_translation_entry tmp;
/* Faking a prev node allows us to keep the algorithm simple */
hash = keysym & KEYMAP_MASK;
ptr = keymap[hash];
tmp.next = ptr;
prev = &tmp;
while (ptr)
{
next = ptr->next;
if (ptr->keysym == keysym)
{
free_key_translation(ptr->tr);
prev->next = next;
xfree(ptr);
}
else
{
prev = ptr;
}
ptr = next;
}
/* Copy pointer back from our fake node */
keymap[hash] = tmp.next;
}
/* Allocate and return a new entry in the translation table */
static key_translation_entry *
new_key_translation_entry(KeySym keysym)
{
uint32 hash;
key_translation_entry *entry;
/* Clear out any existing entry */
delete_key_translation_entry(keysym);
/* Allocate the new one */
entry = (key_translation_entry *) xmalloc(sizeof(key_translation_entry));
memset(entry, 0, sizeof(key_translation_entry));
entry->keysym = keysym;
/* And insert it at head of list */
hash = keysym & KEYMAP_MASK;
entry->next = keymap[hash];
keymap[hash] = entry;
return entry;
}
/* Retrieve the key_translation_entry for a given keysym */
static key_translation_entry *
get_key_translation_entry(uint32 keysym)
{
key_translation_entry *ptr;
key_translation_entry *next;
ptr = keymap[keysym & KEYMAP_MASK];
while (ptr)
{
next = ptr->next;
if (ptr->keysym == keysym)
return ptr;
ptr = next;
}
/* Not found */
return NULL;
}
static void
add_to_keymap(char *keyname, uint8 scancode, uint16 modifiers, char *mapname)
{
KeySym keysym;
key_translation_entry *entry;
keysym = XStringToKeysym(keyname);
if (keysym == NoSymbol)
{
logger(Keyboard, Error, "add_to_keymap(), ignoring bad keysym '%s' in keymap %s",
keyname, mapname);
return;
}
logger(Keyboard, Debug, "add_to_keymap(), adding translation, keysym=0x%x, scancode=0x%x, "
"modifiers=0x%x", (unsigned int) keysym, scancode, modifiers);
/* Make a new entry in the table */
entry = new_key_translation_entry(keysym);
/* And add the new translation to it */
entry->tr = (key_translation *) xmalloc(sizeof(key_translation));
memset(entry->tr, 0, sizeof(key_translation));
entry->tr->scancode = scancode;
entry->tr->modifiers = modifiers;
return;
}
static void
add_sequence(char *rest, char *mapname)
{
KeySym keysym;
KeySym seq_keysym;
key_translation_entry *entry;
key_translation *tr, **prev_next;
size_t chars;
char keyname[KEYMAP_MAX_LINE_LENGTH];
/* Skip over whitespace after the sequence keyword */
chars = strspn(rest, " \t");
rest += chars;
/* Fetch the keysym name */
chars = strcspn(rest, " \t\0");
STRNCPY(keyname, rest, chars + 1);
rest += chars;
keysym = XStringToKeysym(keyname);
if (keysym == NoSymbol)
{
logger(Keyboard, Error, "add_sequence(), ignoring bad keysym '%s' in keymap %s",
keyname, mapname);
return;
}
logger(Keyboard, Debug, "add_sequence(), adding sequence for keysym '%s' (0x%lx)", keyname,
keysym);
entry = new_key_translation_entry(keysym);
prev_next = &(entry->tr);
while (*rest)
{
/* Skip whitespace */
chars = strspn(rest, " \t");
rest += chars;
/* Fetch the keysym name */
chars = strcspn(rest, " \t\0");
STRNCPY(keyname, rest, chars + 1);
rest += chars;
/* Handle trailing whitespace */
if (*keyname == 0)
break;
seq_keysym = XStringToKeysym(keyname);
if (seq_keysym == NoSymbol)
{
logger(Keyboard, Error,
"add_sequence(), ignoring line with bad keysym '%s' in keymap %s",
keyname, mapname);
delete_key_translation_entry(keysym);
return;
}
/* Allocate space for key_translation structure */
tr = (key_translation *) xmalloc(sizeof(key_translation));
memset(tr, 0, sizeof(key_translation));
/* Do this straight away so the key_translation won't get orphaned on error */
if (!entry->tr)
entry->tr = tr;
*prev_next = tr;
prev_next = &tr->next;
tr->seq_keysym = seq_keysym;
}
}
RD_BOOL
xkeymap_from_locale(const char *locale)
{
char *str, *ptr;
FILE *fp;
/* Create a working copy */
str = xstrdup(locale);
/* Truncate at dot and at */
ptr = strrchr(str, '.');
if (ptr)
*ptr = '\0';
ptr = strrchr(str, '@');
if (ptr)
*ptr = '\0';
/* Replace _ with - */
ptr = strrchr(str, '_');
if (ptr)
*ptr = '-';
/* Convert to lowercase */
ptr = str;
while (*ptr)
{
*ptr = tolower((int) *ptr);
ptr++;
}
/* Try to open this keymap (da-dk) */
fp = xkeymap_open(str);
if (fp == NULL)
{
/* Truncate at dash */
ptr = strrchr(str, '-');
if (ptr)
*ptr = '\0';
/* Try the short name (da) */
fp = xkeymap_open(str);
}
if (fp)
{
fclose(fp);
STRNCPY(g_keymapname, str, sizeof(g_keymapname));
xfree(str);
return True;
}
xfree(str);
return False;
}
/* Joins two path components. The result should be freed with
xfree(). */
static char *
pathjoin(const char *a, const char *b)
{
char *result;
result = xmalloc(PATH_MAX * 2 + 1);
if (b[0] == '/')
{
strncpy(result, b, PATH_MAX);
}
else
{
strncpy(result, a, PATH_MAX);
strcat(result, "/");
strncat(result, b, PATH_MAX);
}
return result;
}
/* Try to open a keymap with fopen() */
FILE *
xkeymap_open(const char *filename)
{
char *path1, *path2;
char *home;
FILE *fp;
/* Try ~/.rdesktop/keymaps */
home = getenv("HOME");
if (home)
{
path1 = pathjoin(home, ".rdesktop/keymaps");
path2 = pathjoin(path1, filename);
xfree(path1);
fp = fopen(path2, "r");
xfree(path2);
if (fp)
return fp;
}
/* Try KEYMAP_PATH */
path1 = pathjoin(KEYMAP_PATH, filename);
fp = fopen(path1, "r");
xfree(path1);
if (fp)
return fp;
/* Try current directory, in case we are running from the source
tree */
path1 = pathjoin("keymaps", filename);
fp = fopen(path1, "r");
xfree(path1);
if (fp)
return fp;
return NULL;
}
static RD_BOOL
xkeymap_read(char *mapname)
{
FILE *fp;
char line[KEYMAP_MAX_LINE_LENGTH];
unsigned int line_num = 0;
unsigned int line_length = 0;
char *keyname, *p;
char *line_rest;
uint8 scancode;
uint16 modifiers;
fp = xkeymap_open(mapname);
if (fp == NULL)
{
logger(Keyboard, Error, "xkeymap_read(), failed to open keymap %s", mapname);
return False;
}
/* FIXME: More tolerant on white space */
while (fgets(line, sizeof(line), fp) != NULL)
{
line_num++;
/* Replace the \n with \0 */
p = strchr(line, '\n');
if (p != NULL)
*p = 0;
line_length = strlen(line);
/* Completely empty line */
if (strspn(line, " \t\n\r\f\v") == line_length)
{
continue;
}
/* Include */
if (str_startswith(line, "include "))
{
if (!xkeymap_read(line + sizeof("include ") - 1))
return False;
continue;
}
/* map */
if (str_startswith(line, "map "))
{
g_keylayout = strtoul(line + sizeof("map ") - 1, NULL, 16);
logger(Keyboard, Debug, "xkeymap_read(), Keylayout 0x%x", g_keylayout);
continue;
}
/* compose */
if (str_startswith(line, "enable_compose"))
{
logger(Keyboard, Debug, "xkeymap_read(), enabling compose handling");
g_enable_compose = True;
continue;
}
/* sequence */
if (str_startswith(line, "sequence"))
{
add_sequence(line + sizeof("sequence") - 1, mapname);
continue;
}
/* keyboard_type */
if (str_startswith(line, "keyboard_type "))
{
g_keyboard_type = strtol(line + sizeof("keyboard_type ") - 1, NULL, 16);
logger(Keyboard, Debug, "xkeymap_read(), keyboard_type 0x%x",
g_keyboard_type);
continue;
}
/* keyboard_subtype */
if (str_startswith(line, "keyboard_subtype "))
{
g_keyboard_subtype =
strtol(line + sizeof("keyboard_subtype ") - 1, NULL, 16);
logger(Keyboard, Debug, "xkeymap_read(), keyboard_subtype 0x%x",
g_keyboard_subtype);
continue;
}
/* keyboard_functionkeys */
if (str_startswith(line, "keyboard_functionkeys "))
{
g_keyboard_functionkeys =
strtol(line + sizeof("keyboard_functionkeys ") - 1, NULL, 16);
logger(Keyboard, Debug, "xkeymap_read(), keyboard_functionkeys 0x%x",
g_keyboard_functionkeys);
continue;
}
/* Comment */
if (line[0] == '#')
{
continue;
}
/* Normal line */
keyname = line;
p = strchr(line, ' ');
if (p == NULL)
{
logger(Keyboard, Error, "xkeymap_read(), bad line %d in keymap %s",
line_num, mapname);
continue;
}
else
{
*p = 0;
}
/* scancode */
p++;
scancode = strtol(p, &line_rest, 16);
/* flags */
/* FIXME: Should allow case-insensitive flag names.
Fix by using lex+yacc... */
modifiers = 0;
if (strstr(line_rest, "altgr"))
{
MASK_ADD_BITS(modifiers, MapAltGrMask);
}
if (strstr(line_rest, "shift"))
{
MASK_ADD_BITS(modifiers, MapLeftShiftMask);
}
if (strstr(line_rest, "numlock"))
{
MASK_ADD_BITS(modifiers, MapNumLockMask);
}
if (strstr(line_rest, "localstate"))
{
MASK_ADD_BITS(modifiers, MapLocalStateMask);
}
if (strstr(line_rest, "inhibit"))
{
MASK_ADD_BITS(modifiers, MapInhibitMask);
}
add_to_keymap(keyname, scancode, modifiers, mapname);
if (strstr(line_rest, "addupper"))
{
/* Automatically add uppercase key, with same modifiers
plus shift */
for (p = keyname; *p; p++)
*p = toupper((int) *p);
MASK_ADD_BITS(modifiers, MapLeftShiftMask);
add_to_keymap(keyname, scancode, modifiers, mapname);
}
}
fclose(fp);
return True;
}
/* Before connecting and creating UI */
void
xkeymap_init(void)
{
unsigned int max_keycode;
if (strcmp(g_keymapname, "none"))
{
if (xkeymap_read(g_keymapname))
keymap_loaded = True;
}
XDisplayKeycodes(g_display, &min_keycode, (int *) &max_keycode);
}
static void
send_winkey(uint32 ev_time, RD_BOOL pressed, RD_BOOL leftkey)
{
uint8 winkey;
if (leftkey)
winkey = SCANCODE_CHAR_LWIN;
else
winkey = SCANCODE_CHAR_RWIN;
if (pressed)
{
if (g_rdp_version >= RDP_V5)
{
rdp_send_scancode(ev_time, RDP_KEYPRESS, winkey);
}
else
{
/* RDP4 doesn't support winkey. Fake with Ctrl-Esc */
rdp_send_scancode(ev_time, RDP_KEYPRESS, SCANCODE_CHAR_LCTRL);
rdp_send_scancode(ev_time, RDP_KEYPRESS, SCANCODE_CHAR_ESC);
}
}
else
{
/* key released */
if (g_rdp_version >= RDP_V5)
{
rdp_send_scancode(ev_time, RDP_KEYRELEASE, winkey);
}
else
{
rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_ESC);
rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_LCTRL);
}
}
}
static void
reset_winkey(uint32 ev_time)
{
if (g_rdp_version >= RDP_V5)
{
/* For some reason, it seems to suffice to release
*either* the left or right winkey. */
rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_LWIN);
}
}
void
set_keypress_keysym(unsigned int keycode, KeySym keysym)
{
if (keycode < 8 || keycode > 255)
return;
keypress_keysyms[keycode] = keysym;
}
KeySym
reset_keypress_keysym(unsigned int keycode, KeySym keysym)
{
KeySym ks;
if (keycode < 8 || keycode > 255)
return keysym;
ks = keypress_keysyms[keycode];
if (ks != 0)
{
keypress_keysyms[keycode] = 0;
}
else
{
ks = keysym;
}
return ks;
}
/* Handle special key combinations */
RD_BOOL
handle_special_keys(uint32 keysym, unsigned int state, uint32 ev_time, RD_BOOL pressed)
{
switch (keysym)
{
case XK_Return:
if ((get_key_state(state, XK_Alt_L) || get_key_state(state, XK_Alt_R))
&& (get_key_state(state, XK_Control_L)
|| get_key_state(state, XK_Control_R)))
{
/* Ctrl-Alt-Enter: toggle full screen */
if (pressed)
{
if (!g_seamless_rdp)
{
/* only allow toggle fullscreen when not running
rdesktop in seamless mode */
xwin_toggle_fullscreen();
}
else
{
/* deactivate seamless mode for debug purpose, one can
not activate seamless mode again */
if (g_seamless_active)
ui_seamless_toggle();
}
}
return True;
}
break;
case XK_Break:
/* Send Break sequence E0 46 E0 C6 */
if (pressed)
{
rdp_send_scancode(ev_time, RDP_KEYPRESS,
(SCANCODE_EXTENDED | 0x46));
rdp_send_scancode(ev_time, RDP_KEYPRESS,
(SCANCODE_EXTENDED | 0xc6));
}
/* No release sequence */
return True;
break;
case XK_Pause:
/* According to the RDP documentation (MS-RDPBCGR, page 164),
pressing Pause must result in:
CTRL (0x1D) DOWN with the KBDFLAGS_EXTENDED1 flag
NUMLOCK (0x45) DOWN
CTRL (0x1D) UP with the KBDFLAGS_EXTENDED1 flag
NUMLOCK (0x45) UP
*/
if (pressed)
{
rdp_send_input(ev_time, RDP_INPUT_SCANCODE,
RDP_KEYPRESS | KBD_FLAG_EXT1, 0x1d, 0);
rdp_send_input(ev_time, RDP_INPUT_SCANCODE, RDP_KEYPRESS, 0x45, 0);
rdp_send_input(ev_time, RDP_INPUT_SCANCODE,
RDP_KEYRELEASE | KBD_FLAG_EXT1, 0x1d, 0);
rdp_send_input(ev_time, RDP_INPUT_SCANCODE, RDP_KEYRELEASE, 0x45,
0);
}
return True;
break;
case XK_Meta_L: /* Windows keys */
case XK_Super_L:
case XK_Hyper_L:
send_winkey(ev_time, pressed, True);
return True;
break;
case XK_Meta_R:
case XK_Super_R:
case XK_Hyper_R:
send_winkey(ev_time, pressed, False);
return True;
break;
case XK_space:
/* Prevent access to the Windows system menu in single app mode */
if (g_win_button_size
&& (get_key_state(state, XK_Alt_L) || get_key_state(state, XK_Alt_R)))
return True;
break;
case XK_Num_Lock:
/* Synchronize on key release */
if (g_numlock_sync && !pressed)
rdp_send_input(0, RDP_INPUT_SYNCHRONIZE, 0,
ui_get_numlock_state(read_keyboard_state()), 0);
/* Inhibit */
return True;
break;
case XK_Overlay1_Enable:
/* Toggle SeamlessRDP */
if (pressed)
ui_seamless_toggle();
break;
}
return False;
}
key_translation
xkeymap_translate_key(uint32 keysym, unsigned int keycode, unsigned int state)
{
key_translation tr = { 0, 0, 0, 0 };
key_translation *ptr;
key_translation_entry *entry;
entry = get_key_translation_entry(keysym);
ptr = entry ? entry->tr : NULL;
if (ptr)
{
tr = *ptr;
if (tr.seq_keysym == 0) /* Normal scancode translation */
{
if (MASK_HAS_BITS(tr.modifiers, MapInhibitMask))
{
logger(Keyboard, Debug, "xkeymap_translate_key(), inhibiting key");
tr.scancode = 0;
return tr;
}
if (MASK_HAS_BITS(tr.modifiers, MapLocalStateMask))
{
/* The modifiers to send for this key should be obtained
from the local state. Currently, only shift is implemented. */
if (MASK_HAS_BITS(state, ShiftMask))
{
tr.modifiers = MapLeftShiftMask;
}
}
/* Windows interprets CapsLock+Ctrl+key
differently from Shift+Ctrl+key. Since we
are simulating CapsLock with Shifts, things
like Ctrl+f with CapsLock on breaks. To
solve this, we are releasing Shift if Ctrl
is on, but only if Shift isn't physically pressed. */
if (MASK_HAS_BITS(tr.modifiers, MapShiftMask)
&& MASK_HAS_BITS(remote_modifier_state, MapCtrlMask)
&& !MASK_HAS_BITS(state, ShiftMask))
{
logger(Keyboard, Debug,
"xkeymap_translate_key(), non-physical Shift + Ctrl pressed, releasing Shift");
MASK_REMOVE_BITS(tr.modifiers, MapShiftMask);
}
logger(Keyboard, Debug,
"xkeymap_translate_key(), found scancode translation, scancode=0x%x, modifiers=0x%x",
tr.scancode, tr.modifiers);
}
}
else
{
if (keymap_loaded)
logger(Keyboard, Warning, "No translation for (keysym 0x%lx, %s)", keysym,
get_ksname(keysym));
/* not in keymap, try to interpret the raw scancode */
if (((int) keycode >= min_keycode) && (keycode <= 0x60))
{
tr.scancode = keycode - min_keycode;
/* The modifiers to send for this key should be
obtained from the local state. Currently, only
shift is implemented. */
if (MASK_HAS_BITS(state, ShiftMask))
{
tr.modifiers = MapLeftShiftMask;
}
logger(Keyboard, Debug, "Sending guessed scancode 0x%x", tr.scancode);
}
else
{
logger(Keyboard, Debug, "No good guess for keycode 0x%x found", keycode);
}
}
return tr;
}
static RD_BOOL
is_modifier(uint8 scancode)
{
switch (scancode)
{
case SCANCODE_CHAR_LSHIFT:
case SCANCODE_CHAR_RSHIFT:
case SCANCODE_CHAR_LCTRL:
case SCANCODE_CHAR_RCTRL:
case SCANCODE_CHAR_LALT:
case SCANCODE_CHAR_RALT:
case SCANCODE_CHAR_LWIN:
case SCANCODE_CHAR_RWIN:
case SCANCODE_CHAR_NUMLOCK:
return True;
default:
break;
}
return False;
}
void
xkeymap_send_keys(uint32 keysym, unsigned int keycode, unsigned int state, uint32 ev_time,
RD_BOOL pressed, uint8 nesting)
{
key_translation tr, *ptr;
tr = xkeymap_translate_key(keysym, keycode, state);
if (tr.seq_keysym == 0)
{
/* Scancode translation */
if (tr.scancode == 0)
return;
save_remote_modifiers(tr.scancode);
ensure_remote_modifiers(ev_time, tr);
rdp_send_scancode(ev_time, pressed ? RDP_KEYPRESS : RDP_KEYRELEASE, tr.scancode);
restore_remote_modifiers(ev_time, tr.scancode);
return;
}
/* Sequence, only on key down */
if (pressed)
{
ptr = &tr;
do
{
logger(Keyboard, Debug,
"xkeymap_send_keys(), handling sequence element, keysym=0x%x",
(unsigned int) ptr->seq_keysym);
if (nesting++ > 32)
{
logger(Keyboard, Error, "Sequence nesting too deep");
return;
}
xkeymap_send_keys(ptr->seq_keysym, keycode, state, ev_time, True, nesting);
xkeymap_send_keys(ptr->seq_keysym, keycode, state, ev_time, False, nesting);
ptr = ptr->next;
}
while (ptr);
}
}
uint16
xkeymap_translate_button(unsigned int button, uint16 * input_type)
{
*input_type = RDP_INPUT_MOUSE;
switch (button)
{
case Button1: /* left */
return MOUSE_FLAG_BUTTON1;
case Button2: /* middle */
return MOUSE_FLAG_BUTTON3;
case Button3: /* right */
return MOUSE_FLAG_BUTTON2;
case Button4: /* wheel up */
return MOUSE_FLAG_BUTTON4;
case Button5: /* wheel down */
return MOUSE_FLAG_BUTTON5;
case 8: /* button 4 */
*input_type = RDP_INPUT_MOUSEX;
return MOUSEX_FLAG_BUTTON1;
case 9: /* button 5 */
*input_type = RDP_INPUT_MOUSEX;
return MOUSEX_FLAG_BUTTON2;
}
return 0;
}
char *
get_ksname(uint32 keysym)
{
char *ksname = NULL;
if (keysym == NoSymbol)
ksname = "NoSymbol";
else if (!(ksname = XKeysymToString(keysym)))
ksname = "(no name)";
return ksname;
}
void
save_remote_modifiers(uint8 scancode)
{
if (is_modifier(scancode))
return;
saved_remote_modifier_state = remote_modifier_state;
}
void
restore_remote_modifiers(uint32 ev_time, uint8 scancode)
{
key_translation dummy = { 0 };
if (is_modifier(scancode))
return;
dummy.scancode = 0;
dummy.modifiers = saved_remote_modifier_state;
ensure_remote_modifiers(ev_time, dummy);
}
void
ensure_remote_modifiers(uint32 ev_time, key_translation tr)
{
/* If this key is a modifier, do nothing */
if (is_modifier(tr.scancode))
return;
if (!g_numlock_sync)
{
/* NumLock */
if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask)
!= MASK_HAS_BITS(remote_modifier_state, MapNumLockMask))
{
/* The remote modifier state is not correct */
uint16 new_remote_state;
if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask))
{
logger(Keyboard, Debug,
"ensure_remote_modifiers(), remote NumLock state is incorrect, activating NumLock");
new_remote_state = KBD_FLAG_NUMLOCK;
remote_modifier_state = MapNumLockMask;
}
else
{
logger(Keyboard, Debug,
"ensure_remote_modifiers(), remote NumLock state is incorrect, deactivating NumLock.");
new_remote_state = 0;
remote_modifier_state = 0;
}
rdp_send_input(0, RDP_INPUT_SYNCHRONIZE, 0, new_remote_state, 0);
}
}
/* Shift. Left shift and right shift are treated as equal; either is fine. */
if (MASK_HAS_BITS(tr.modifiers, MapShiftMask)
!= MASK_HAS_BITS(remote_modifier_state, MapShiftMask))
{
/* The remote modifier state is not correct */
if (MASK_HAS_BITS(tr.modifiers, MapLeftShiftMask))
{
/* Needs left shift. Send down. */
rdp_send_scancode(ev_time, RDP_KEYPRESS, SCANCODE_CHAR_LSHIFT);
}
else if (MASK_HAS_BITS(tr.modifiers, MapRightShiftMask))