trunk/rdesktop/xkeymap.c

/*
   rdesktop: A Remote Desktop Protocol client.
   User interface services - X keyboard mapping
   Copyright (C) Matthew Chapman 1999-2001
   
   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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include "rdesktop.h"
#include "scancodes.h"

#define KEYMAP_SIZE 4096
#define KEYMAP_MASK (KEYMAP_SIZE - 1)
#define KEYMAP_MAX_LINE_LENGTH 80

extern Display *display;
extern char keymapname[16];
extern int keylayout;

static key_translation keymap[KEYMAP_SIZE];
static unsigned int min_keycode;
static uint16 remote_modifier_state = 0;

static void
add_to_keymap(char *keyname, uint8 scancode, uint16 modifiers, char *mapname)
{
        KeySym keysym;

        keysym = XStringToKeysym(keyname);
        if (keysym == NoSymbol)
        {
                error("Bad keysym %s in keymap %s\n", keyname, mapname);
                return;
        }

        DEBUG_KBD("Adding translation, keysym=0x%x, scancode=0x%x, "
                  "modifiers=0x%x\n", (unsigned int) keysym, scancode,
                  modifiers);

        keymap[keysym & KEYMAP_MASK].scancode = scancode;
        keymap[keysym & KEYMAP_MASK].modifiers = modifiers;

        return;
}


static BOOL
xkeymap_read(char *mapname)
{
        FILE *fp;
        char line[KEYMAP_MAX_LINE_LENGTH], path[PATH_MAX];
        unsigned int line_num = 0;
        unsigned int line_length = 0;
        char *keyname, *p;
        char *line_rest;
        uint8 scancode;
        uint16 modifiers;


        strcpy(path, KEYMAP_PATH);
        strncat(path, mapname, sizeof(path) - sizeof(KEYMAP_PATH));

        fp = fopen(path, "r");
        if (fp == NULL)
        {
                error("Failed to open keymap %s\n", path);
                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 (strncmp(line, "include ", 8) == 0)
                {
                        if (!xkeymap_read(line + 8))
                                return False;
                        continue;
                }

                /* map */
                if (strncmp(line, "map ", 4) == 0)
                {
                        keylayout = strtol(line + 4, NULL, 16);
                        DEBUG_KBD("Keylayout 0x%x\n", keylayout);
                        continue;
                }

                /* Comment */
                if (line[0] == '#')
                {
                        continue;
                }

                /* Normal line */
                keyname = line;
                p = strchr(line, ' ');
                if (p == NULL)
                {
                        error("Bad line %d in keymap %s\n", 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);
                }

                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(*p);
                        MASK_ADD_BITS(modifiers, MapLeftShiftMask);
                        add_to_keymap(keyname, scancode, modifiers, mapname);
                }
        }

        fclose(fp);
        return True;
}


/* Before connecting and creating UI */
void
xkeymap_init1(void)
{
        int i;

        /* Zeroing keymap */
        for (i = 0; i < KEYMAP_SIZE; i++)
        {
                keymap[i].scancode = 0;
                keymap[i].modifiers = 0;
        }

        if (strcmp(keymapname, "none"))
        {
                xkeymap_read(keymapname);
        }

}

/* After connecting and creating UI */
void
xkeymap_init2(void)
{
        unsigned int max_keycode;
        XDisplayKeycodes(display, &min_keycode, &max_keycode);
}


key_translation
xkeymap_translate_key(KeySym keysym, unsigned int keycode)
{
        key_translation tr = { 0, 0 };

        tr = keymap[keysym & KEYMAP_MASK];

        if (tr.scancode != 0)
        {
                DEBUG_KBD
                        ("Found key translation, scancode=0x%x, modifiers=0x%x\n",
                         tr.scancode, tr.modifiers);
                return tr;
        }

        printf("No translation for (keysym 0x%lx, %s)\n", keysym,
               get_ksname(keysym));

        /* not in keymap, try to interpret the raw scancode */
        if ((keycode >= min_keycode) && (keycode <= 0x60))
        {
                tr.scancode = keycode - min_keycode;
                printf("Sending guessed scancode 0x%x\n", tr.scancode);
        }
        else
        {
                printf("No good guess for keycode 0x%x found\n", keycode);
        }

        return tr;
}

uint16
xkeymap_translate_button(unsigned int button)
{
        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;
        }

        return 0;
}

char *
get_ksname(KeySym keysym)
{
        char *ksname = NULL;

        if (keysym == NoSymbol)
                ksname = "NoSymbol";
        else if (!(ksname = XKeysymToString(keysym)))
                ksname = "(no name)";

        return ksname;
}

BOOL
inhibit_key(KeySym keysym)
{
        switch (keysym)
        {
                case XK_Caps_Lock:
                        return True;
                        break;
                case XK_Multi_key:
                        return True;
                        break;
                default:
                        break;
        }
        return False;
}

void
ensure_remote_modifiers(uint32 ev_time, key_translation tr)
{
        /* If this key is a modifier, do nothing */
        switch (tr.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;
                default:
                        break;
        }

        /* Shift */
        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, MapShiftMask))
                {
                        /* Needs this modifier. Send down. */
                        rdp_send_scancode(ev_time, RDP_KEYPRESS,
                                          SCANCODE_CHAR_LSHIFT);
                }
                else
                {
                        /* Should not use this modifier. Send up. */
                        rdp_send_scancode(ev_time, RDP_KEYRELEASE,
                                          SCANCODE_CHAR_LSHIFT);
                }
        }

        /* AltGr */
        if (MASK_HAS_BITS(tr.modifiers, MapAltGrMask)
            != MASK_HAS_BITS(remote_modifier_state, MapAltGrMask))
        {
                /* The remote modifier state is not correct */
                if (MASK_HAS_BITS(tr.modifiers, MapAltGrMask))
                {
                        /* Needs this modifier. Send down. */
                        rdp_send_scancode(ev_time, RDP_KEYPRESS,
                                          SCANCODE_CHAR_RALT);
                }
                else
                {
                        /* Should not use this modifier. Send up. */
                        rdp_send_scancode(ev_time, RDP_KEYRELEASE,
                                          SCANCODE_CHAR_RALT);
                }
        }

        /* NumLock */
        if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask)
            != MASK_HAS_BITS(remote_modifier_state, MapNumLockMask))
        {
                /* The remote modifier state is not correct */
                DEBUG_KBD("Remote NumLock state is incorrect. Toggling\n");
                if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask))
                {
                        /* Needs this modifier. Toggle */
                        rdp_send_scancode(ev_time, RDP_KEYPRESS,
                                          SCANCODE_CHAR_NUMLOCK);
                        rdp_send_scancode(ev_time, RDP_KEYRELEASE,
                                          SCANCODE_CHAR_NUMLOCK);
                }
                else
                {
                        /* Should not use this modifier. Toggle */
                        rdp_send_scancode(ev_time, RDP_KEYPRESS,
                                          SCANCODE_CHAR_NUMLOCK);
                        rdp_send_scancode(ev_time, RDP_KEYRELEASE,
                                          SCANCODE_CHAR_NUMLOCK);
                }
        }

}


static void
update_modifier_state(uint16 modifiers, BOOL pressed)
{

        DEBUG_KBD("Before updating modifier_state:0x%x, pressed=0x%x\n",
                  remote_modifier_state, pressed);
        switch (modifiers)
        {
                case SCANCODE_CHAR_LSHIFT:
                        MASK_CHANGE_BIT(remote_modifier_state,
                                        MapLeftShiftMask, pressed);
                        break;
                case SCANCODE_CHAR_RSHIFT:
                        MASK_CHANGE_BIT(remote_modifier_state,
                                        MapRightShiftMask, pressed);
                        break;
                case SCANCODE_CHAR_LCTRL:
                        MASK_CHANGE_BIT(remote_modifier_state,
                                        MapLeftCtrlMask, pressed);
                        break;
                case SCANCODE_CHAR_RCTRL:
                        MASK_CHANGE_BIT(remote_modifier_state,
                                        MapRightCtrlMask, pressed);
                        break;
                case SCANCODE_CHAR_LALT:
                        MASK_CHANGE_BIT(remote_modifier_state, MapLeftAltMask,
                                        pressed);
                        break;
                case SCANCODE_CHAR_RALT:
                        MASK_CHANGE_BIT(remote_modifier_state,
                                        MapRightAltMask, pressed);
                        break;
                case SCANCODE_CHAR_LWIN:
                        MASK_CHANGE_BIT(remote_modifier_state, MapLeftWinMask,
                                        pressed);
                        break;
                case SCANCODE_CHAR_RWIN:
                        MASK_CHANGE_BIT(remote_modifier_state,
                                        MapRightWinMask, pressed);
                        break;
                case SCANCODE_CHAR_NUMLOCK:
                        /* KeyReleases for NumLocks are sent immediately. Toggle the
                           modifier state only on Keypress */
                        if (pressed)
                        {
                                BOOL newNumLockState;
                                newNumLockState =
                                        (MASK_HAS_BITS
                                         (remote_modifier_state,
                                          MapNumLockMask) == False);
                                MASK_CHANGE_BIT(remote_modifier_state,
                                                MapNumLockMask,
                                                newNumLockState);
                        }
                        break;
        }
        DEBUG_KBD("After updating modifier_state:0x%x\n",
                  remote_modifier_state);

}

/* Send keyboard input */
void
rdp_send_scancode(uint32 time, uint16 flags, uint16 scancode)
{
        update_modifier_state(scancode, !(flags & RDP_KEYRELEASE));

        if (scancode & SCANCODE_EXTENDED)
        {
                DEBUG_KBD("Sending extended scancode=0x%x, flags=0x%x\n",
                          scancode & ~SCANCODE_EXTENDED, flags);
                rdp_send_input(time, RDP_INPUT_SCANCODE, flags | KBD_FLAG_EXT,
                               scancode & ~SCANCODE_EXTENDED, 0);
        }
        else
        {
                DEBUG_KBD("Sending scancode=0x%x, flags=0x%x\n", scancode,
                          flags);
                rdp_send_input(time, RDP_INPUT_SCANCODE, flags, scancode, 0);
        }
}
1	matthewc	38	/*
2			rdesktop: A Remote Desktop Protocol client.
3			User interface services - X keyboard mapping
4			Copyright (C) Matthew Chapman 1999-2001
5
6			This program is free software; you can redistribute it and/or modify
7			it under the terms of the GNU General Public License as published by
8			the Free Software Foundation; either version 2 of the License, or
9			(at your option) any later version.
10
11			This program is distributed in the hope that it will be useful,
12			but WITHOUT ANY WARRANTY; without even the implied warranty of
13			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			GNU General Public License for more details.
15
16			You should have received a copy of the GNU General Public License
17			along with this program; if not, write to the Free Software
18			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19			*/
20
21			#include <X11/Xlib.h>
22			#include <X11/keysym.h>
23			#include <stdio.h>
24			#include <stdlib.h>
25			#include <string.h>
26	astrand	66	#include <ctype.h>
27	matthewc	39	#include <limits.h>
28	matthewc	38	#include "rdesktop.h"
29	astrand	66	#include "scancodes.h"
30	matthewc	38
31			#define KEYMAP_SIZE 4096
32			#define KEYMAP_MASK (KEYMAP_SIZE - 1)
33	astrand	66	#define KEYMAP_MAX_LINE_LENGTH 80
34	matthewc	38
35	matthewc	50	extern Display *display;
36	matthewc	38	extern char keymapname[16];
37			extern int keylayout;
38
39	astrand	66	static key_translation keymap[KEYMAP_SIZE];
40	matthewc	38	static unsigned int min_keycode;
41	astrand	66	static uint16 remote_modifier_state = 0;
42	matthewc	38
43	astrand	66	static void
44			add_to_keymap(char keyname, uint8 scancode, uint16 modifiers, char mapname)
45			{
46			KeySym keysym;
47
48			keysym = XStringToKeysym(keyname);
49			if (keysym == NoSymbol)
50			{
51			error("Bad keysym %s in keymap %s\n", keyname, mapname);
52			return;
53			}
54
55			DEBUG_KBD("Adding translation, keysym=0x%x, scancode=0x%x, "
56			"modifiers=0x%x\n", (unsigned int) keysym, scancode,
57			modifiers);
58
59			keymap[keysym & KEYMAP_MASK].scancode = scancode;
60			keymap[keysym & KEYMAP_MASK].modifiers = modifiers;
61
62			return;
63			}
64
65
66	astrand	64	static BOOL
67			xkeymap_read(char *mapname)
68	matthewc	38	{
69			FILE *fp;
70	astrand	66	char line[KEYMAP_MAX_LINE_LENGTH], path[PATH_MAX];
71			unsigned int line_num = 0;
72			unsigned int line_length = 0;
73	matthewc	38	char keyname, p;
74	astrand	66	char *line_rest;
75			uint8 scancode;
76			uint16 modifiers;
77	matthewc	38
78	astrand	66
79	matthewc	38	strcpy(path, KEYMAP_PATH);
80			strncat(path, mapname, sizeof(path) - sizeof(KEYMAP_PATH));
81
82			fp = fopen(path, "r");
83			if (fp == NULL)
84			{
85			error("Failed to open keymap %s\n", path);
86			return False;
87			}
88
89	astrand	66	/* FIXME: More tolerant on white space */
90	matthewc	38	while (fgets(line, sizeof(line), fp) != NULL)
91			{
92	astrand	66	line_num++;
93
94			/* Replace the \n with \0 */
95	matthewc	38	p = strchr(line, '\n');
96			if (p != NULL)
97			*p = 0;
98
99	astrand	66	line_length = strlen(line);
100
101			/* Completely empty line */
102			if (strspn(line, " \t\n\r\f\v") == line_length)
103	matthewc	38	{
104	astrand	66	continue;
105			}
106	matthewc	38
107	astrand	66	/* Include */
108			if (strncmp(line, "include ", 8) == 0)
109	matthewc	38	{
110	astrand	64	if (!xkeymap_read(line + 8))
111	matthewc	38	return False;
112	astrand	66	continue;
113	matthewc	38	}
114	astrand	66
115			/* map */
116			if (strncmp(line, "map ", 4) == 0)
117	matthewc	38	{
118	astrand	64	keylayout = strtol(line + 4, NULL, 16);
119	astrand	66	DEBUG_KBD("Keylayout 0x%x\n", keylayout);
120			continue;
121	matthewc	38	}
122	astrand	66
123			/* Comment */
124			if (line[0] == '#')
125	matthewc	38	{
126	astrand	66	continue;
127	matthewc	38	}
128	astrand	66
129			/* Normal line */
130			keyname = line;
131			p = strchr(line, ' ');
132			if (p == NULL)
133			{
134			error("Bad line %d in keymap %s\n", line_num,
135			mapname);
136			continue;
137			}
138			else
139			{
140			*p = 0;
141			}
142
143			/* scancode */
144			p++;
145			scancode = strtol(p, &line_rest, 16);
146
147			/* flags */
148			/* FIXME: Should allow case-insensitive flag names.
149			Fix by using lex+yacc... */
150			modifiers = 0;
151			if (strstr(line_rest, "altgr"))
152			{
153			MASK_ADD_BITS(modifiers, MapAltGrMask);
154			}
155
156			if (strstr(line_rest, "shift"))
157			{
158			MASK_ADD_BITS(modifiers, MapLeftShiftMask);
159			}
160
161			if (strstr(line_rest, "numlock"))
162			{
163			MASK_ADD_BITS(modifiers, MapNumLockMask);
164			}
165
166			add_to_keymap(keyname, scancode, modifiers, mapname);
167
168			if (strstr(line_rest, "addupper"))
169			{
170			/* Automatically add uppercase key, with same modifiers
171			plus shift */
172			for (p = keyname; *p; p++)
173			p = toupper(p);
174			MASK_ADD_BITS(modifiers, MapLeftShiftMask);
175			add_to_keymap(keyname, scancode, modifiers, mapname);
176			}
177	matthewc	38	}
178
179			fclose(fp);
180			return True;
181			}
182
183	astrand	66
184			/* Before connecting and creating UI */
185	astrand	64	void
186	astrand	66	xkeymap_init1(void)
187	matthewc	38	{
188	astrand	66	int i;
189	matthewc	38
190	astrand	66	/* Zeroing keymap */
191			for (i = 0; i < KEYMAP_SIZE; i++)
192			{
193			keymap[i].scancode = 0;
194			keymap[i].modifiers = 0;
195			}
196	matthewc	38
197			if (strcmp(keymapname, "none"))
198	astrand	66	{
199	matthewc	38	xkeymap_read(keymapname);
200	astrand	66	}
201
202	matthewc	38	}
203
204	astrand	66	/* After connecting and creating UI */
205			void
206			xkeymap_init2(void)
207	matthewc	38	{
208	astrand	66	unsigned int max_keycode;
209			XDisplayKeycodes(display, &min_keycode, &max_keycode);
210			}
211	matthewc	38
212	astrand	66
213			key_translation
214			xkeymap_translate_key(KeySym keysym, unsigned int keycode)
215			{
216			key_translation tr = { 0, 0 };
217
218			tr = keymap[keysym & KEYMAP_MASK];
219
220			if (tr.scancode != 0)
221	matthewc	50	{
222	astrand	66	DEBUG_KBD
223			("Found key translation, scancode=0x%x, modifiers=0x%x\n",
224			tr.scancode, tr.modifiers);
225			return tr;
226	matthewc	50	}
227
228	astrand	66	printf("No translation for (keysym 0x%lx, %s)\n", keysym,
229			get_ksname(keysym));
230
231	matthewc	38	/* not in keymap, try to interpret the raw scancode */
232			if ((keycode >= min_keycode) && (keycode <= 0x60))
233			{
234	astrand	66	tr.scancode = keycode - min_keycode;
235			printf("Sending guessed scancode 0x%x\n", tr.scancode);
236	matthewc	38	}
237	astrand	66	else
238			{
239			printf("No good guess for keycode 0x%x found\n", keycode);
240			}
241	matthewc	38
242	astrand	66	return tr;
243	matthewc	38	}
244
245	astrand	64	uint16
246			xkeymap_translate_button(unsigned int button)
247	matthewc	38	{
248			switch (button)
249			{
250	astrand	64	case Button1: /* left */
251	matthewc	38	return MOUSE_FLAG_BUTTON1;
252	astrand	64	case Button2: /* middle */
253	matthewc	38	return MOUSE_FLAG_BUTTON3;
254	astrand	64	case Button3: /* right */
255	matthewc	38	return MOUSE_FLAG_BUTTON2;
256	jsorg71	67	case Button4: /* wheel up */
257			return MOUSE_FLAG_BUTTON4;
258			case Button5: /* wheel down */
259			return MOUSE_FLAG_BUTTON5;
260	matthewc	38	}
261
262			return 0;
263			}
264	astrand	66
265			char *
266			get_ksname(KeySym keysym)
267			{
268			char *ksname = NULL;
269
270			if (keysym == NoSymbol)
271			ksname = "NoSymbol";
272			else if (!(ksname = XKeysymToString(keysym)))
273			ksname = "(no name)";
274
275			return ksname;
276			}
277
278			BOOL
279			inhibit_key(KeySym keysym)
280			{
281			switch (keysym)
282			{
283			case XK_Caps_Lock:
284			return True;
285			break;
286			case XK_Multi_key:
287			return True;
288			break;
289			default:
290			break;
291			}
292			return False;
293			}
294
295			void
296			ensure_remote_modifiers(uint32 ev_time, key_translation tr)
297			{
298			/* If this key is a modifier, do nothing */
299			switch (tr.scancode)
300			{
301			case SCANCODE_CHAR_LSHIFT:
302			case SCANCODE_CHAR_RSHIFT:
303			case SCANCODE_CHAR_LCTRL:
304			case SCANCODE_CHAR_RCTRL:
305			case SCANCODE_CHAR_LALT:
306			case SCANCODE_CHAR_RALT:
307			case SCANCODE_CHAR_LWIN:
308			case SCANCODE_CHAR_RWIN:
309			case SCANCODE_CHAR_NUMLOCK:
310			return;
311			default:
312			break;
313			}
314
315			/* Shift */
316			if (MASK_HAS_BITS(tr.modifiers, MapShiftMask)
317			!= MASK_HAS_BITS(remote_modifier_state, MapShiftMask))
318			{
319			/* The remote modifier state is not correct */
320			if (MASK_HAS_BITS(tr.modifiers, MapShiftMask))
321			{
322			/* Needs this modifier. Send down. */
323			rdp_send_scancode(ev_time, RDP_KEYPRESS,
324			SCANCODE_CHAR_LSHIFT);
325			}
326			else
327			{
328			/* Should not use this modifier. Send up. */
329			rdp_send_scancode(ev_time, RDP_KEYRELEASE,
330			SCANCODE_CHAR_LSHIFT);
331			}
332			}
333
334			/* AltGr */
335			if (MASK_HAS_BITS(tr.modifiers, MapAltGrMask)
336			!= MASK_HAS_BITS(remote_modifier_state, MapAltGrMask))
337			{
338			/* The remote modifier state is not correct */
339			if (MASK_HAS_BITS(tr.modifiers, MapAltGrMask))
340			{
341			/* Needs this modifier. Send down. */
342			rdp_send_scancode(ev_time, RDP_KEYPRESS,
343			SCANCODE_CHAR_RALT);
344			}
345			else
346			{
347			/* Should not use this modifier. Send up. */
348			rdp_send_scancode(ev_time, RDP_KEYRELEASE,
349			SCANCODE_CHAR_RALT);
350			}
351			}
352
353			/* NumLock */
354			if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask)
355			!= MASK_HAS_BITS(remote_modifier_state, MapNumLockMask))
356			{
357			/* The remote modifier state is not correct */
358			DEBUG_KBD("Remote NumLock state is incorrect. Toggling\n");
359			if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask))
360			{
361			/* Needs this modifier. Toggle */
362			rdp_send_scancode(ev_time, RDP_KEYPRESS,
363			SCANCODE_CHAR_NUMLOCK);
364			rdp_send_scancode(ev_time, RDP_KEYRELEASE,
365			SCANCODE_CHAR_NUMLOCK);
366			}
367			else
368			{
369			/* Should not use this modifier. Toggle */
370			rdp_send_scancode(ev_time, RDP_KEYPRESS,
371			SCANCODE_CHAR_NUMLOCK);
372			rdp_send_scancode(ev_time, RDP_KEYRELEASE,
373			SCANCODE_CHAR_NUMLOCK);
374			}
375			}
376
377			}
378
379
380			static void
381			update_modifier_state(uint16 modifiers, BOOL pressed)
382			{
383
384			DEBUG_KBD("Before updating modifier_state:0x%x, pressed=0x%x\n",
385			remote_modifier_state, pressed);
386			switch (modifiers)
387			{
388			case SCANCODE_CHAR_LSHIFT:
389			MASK_CHANGE_BIT(remote_modifier_state,
390			MapLeftShiftMask, pressed);
391			break;
392			case SCANCODE_CHAR_RSHIFT:
393			MASK_CHANGE_BIT(remote_modifier_state,
394			MapRightShiftMask, pressed);
395			break;
396			case SCANCODE_CHAR_LCTRL:
397			MASK_CHANGE_BIT(remote_modifier_state,
398			MapLeftCtrlMask, pressed);
399			break;
400			case SCANCODE_CHAR_RCTRL:
401			MASK_CHANGE_BIT(remote_modifier_state,
402			MapRightCtrlMask, pressed);
403			break;
404			case SCANCODE_CHAR_LALT:
405			MASK_CHANGE_BIT(remote_modifier_state, MapLeftAltMask,
406			pressed);
407			break;
408			case SCANCODE_CHAR_RALT:
409			MASK_CHANGE_BIT(remote_modifier_state,
410			MapRightAltMask, pressed);
411			break;
412			case SCANCODE_CHAR_LWIN:
413			MASK_CHANGE_BIT(remote_modifier_state, MapLeftWinMask,
414			pressed);
415			break;
416			case SCANCODE_CHAR_RWIN:
417			MASK_CHANGE_BIT(remote_modifier_state,
418			MapRightWinMask, pressed);
419			break;
420			case SCANCODE_CHAR_NUMLOCK:
421			/* KeyReleases for NumLocks are sent immediately. Toggle the
422			modifier state only on Keypress */
423			if (pressed)
424			{
425			BOOL newNumLockState;
426			newNumLockState =
427			(MASK_HAS_BITS
428			(remote_modifier_state,
429			MapNumLockMask) == False);
430			MASK_CHANGE_BIT(remote_modifier_state,
431			MapNumLockMask,
432			newNumLockState);
433			}
434			break;
435			}
436			DEBUG_KBD("After updating modifier_state:0x%x\n",
437			remote_modifier_state);
438
439			}
440
441			/* Send keyboard input */
442			void
443			rdp_send_scancode(uint32 time, uint16 flags, uint16 scancode)
444			{
445			update_modifier_state(scancode, !(flags & RDP_KEYRELEASE));
446
447			if (scancode & SCANCODE_EXTENDED)
448			{
449			DEBUG_KBD("Sending extended scancode=0x%x, flags=0x%x\n",
450			scancode & ~SCANCODE_EXTENDED, flags);
451			rdp_send_input(time, RDP_INPUT_SCANCODE, flags \| KBD_FLAG_EXT,
452			scancode & ~SCANCODE_EXTENDED, 0);
453			}
454			else
455			{
456			DEBUG_KBD("Sending scancode=0x%x, flags=0x%x\n", scancode,
457			flags);
458			rdp_send_input(time, RDP_INPUT_SCANCODE, flags, scancode, 0);
459			}
460			}