rdesktop/trunk/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;
extern BOOL enable_compose;

static key_translation keymap[KEYMAP_SIZE];
static 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;
                }

                /* compose */
                if (strncmp(line, "enable_compose", 15) == 0)
                {
                        DEBUG_KBD("Enabling compose handling\n");
                        enable_compose = True;
                        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);
                }

                if (strstr(line_rest, "localstate"))
                {
                        MASK_ADD_BITS(modifiers, MapLocalStateMask);
                }

                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, (int *)&max_keycode);
}


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

        tr = keymap[keysym & KEYMAP_MASK];

        if (tr.modifiers & MapLocalStateMask)
        {
                /* The modifiers to send for this key should be obtained
                   from the local state. Currently, only shift is implemented. */
                if (state & ShiftMask)
                {
                        tr.modifiers = MapLeftShiftMask;
                }
        }

        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	astrand	70	extern BOOL enable_compose;
39	matthewc	38
40	astrand	66	static key_translation keymap[KEYMAP_SIZE];
41	astrand	73	static int min_keycode;
42	astrand	66	static uint16 remote_modifier_state = 0;
43	matthewc	38
44	astrand	66	static void
45			add_to_keymap(char keyname, uint8 scancode, uint16 modifiers, char mapname)
46			{
47			KeySym keysym;
48
49			keysym = XStringToKeysym(keyname);
50			if (keysym == NoSymbol)
51			{
52			error("Bad keysym %s in keymap %s\n", keyname, mapname);
53			return;
54			}
55
56			DEBUG_KBD("Adding translation, keysym=0x%x, scancode=0x%x, "
57			"modifiers=0x%x\n", (unsigned int) keysym, scancode,
58			modifiers);
59
60			keymap[keysym & KEYMAP_MASK].scancode = scancode;
61			keymap[keysym & KEYMAP_MASK].modifiers = modifiers;
62
63			return;
64			}
65
66
67	astrand	64	static BOOL
68			xkeymap_read(char *mapname)
69	matthewc	38	{
70			FILE *fp;
71	astrand	66	char line[KEYMAP_MAX_LINE_LENGTH], path[PATH_MAX];
72			unsigned int line_num = 0;
73			unsigned int line_length = 0;
74	matthewc	38	char keyname, p;
75	astrand	66	char *line_rest;
76			uint8 scancode;
77			uint16 modifiers;
78	matthewc	38
79	astrand	66
80	matthewc	38	strcpy(path, KEYMAP_PATH);
81			strncat(path, mapname, sizeof(path) - sizeof(KEYMAP_PATH));
82
83			fp = fopen(path, "r");
84			if (fp == NULL)
85			{
86			error("Failed to open keymap %s\n", path);
87			return False;
88			}
89
90	astrand	66	/* FIXME: More tolerant on white space */
91	matthewc	38	while (fgets(line, sizeof(line), fp) != NULL)
92			{
93	astrand	66	line_num++;
94
95			/* Replace the \n with \0 */
96	matthewc	38	p = strchr(line, '\n');
97			if (p != NULL)
98			*p = 0;
99
100	astrand	66	line_length = strlen(line);
101
102			/* Completely empty line */
103			if (strspn(line, " \t\n\r\f\v") == line_length)
104	matthewc	38	{
105	astrand	66	continue;
106			}
107	matthewc	38
108	astrand	66	/* Include */
109			if (strncmp(line, "include ", 8) == 0)
110	matthewc	38	{
111	astrand	64	if (!xkeymap_read(line + 8))
112	matthewc	38	return False;
113	astrand	66	continue;
114	matthewc	38	}
115	astrand	66
116			/* map */
117			if (strncmp(line, "map ", 4) == 0)
118	matthewc	38	{
119	astrand	64	keylayout = strtol(line + 4, NULL, 16);
120	astrand	66	DEBUG_KBD("Keylayout 0x%x\n", keylayout);
121			continue;
122	matthewc	38	}
123	astrand	66
124	astrand	70	/* compose */
125			if (strncmp(line, "enable_compose", 15) == 0)
126			{
127			DEBUG_KBD("Enabling compose handling\n");
128			enable_compose = True;
129			continue;
130			}
131
132	astrand	66	/* Comment */
133			if (line[0] == '#')
134	matthewc	38	{
135	astrand	66	continue;
136	matthewc	38	}
137	astrand	66
138			/* Normal line */
139			keyname = line;
140			p = strchr(line, ' ');
141			if (p == NULL)
142			{
143			error("Bad line %d in keymap %s\n", line_num,
144			mapname);
145			continue;
146			}
147			else
148			{
149			*p = 0;
150			}
151
152			/* scancode */
153			p++;
154			scancode = strtol(p, &line_rest, 16);
155
156			/* flags */
157			/* FIXME: Should allow case-insensitive flag names.
158			Fix by using lex+yacc... */
159			modifiers = 0;
160			if (strstr(line_rest, "altgr"))
161			{
162			MASK_ADD_BITS(modifiers, MapAltGrMask);
163			}
164
165			if (strstr(line_rest, "shift"))
166			{
167			MASK_ADD_BITS(modifiers, MapLeftShiftMask);
168			}
169
170			if (strstr(line_rest, "numlock"))
171			{
172			MASK_ADD_BITS(modifiers, MapNumLockMask);
173			}
174
175	astrand	69	if (strstr(line_rest, "localstate"))
176			{
177			MASK_ADD_BITS(modifiers, MapLocalStateMask);
178			}
179
180	astrand	66	add_to_keymap(keyname, scancode, modifiers, mapname);
181
182			if (strstr(line_rest, "addupper"))
183			{
184			/* Automatically add uppercase key, with same modifiers
185			plus shift */
186			for (p = keyname; *p; p++)
187			p = toupper(p);
188			MASK_ADD_BITS(modifiers, MapLeftShiftMask);
189			add_to_keymap(keyname, scancode, modifiers, mapname);
190			}
191	matthewc	38	}
192
193			fclose(fp);
194			return True;
195			}
196
197	astrand	66
198			/* Before connecting and creating UI */
199	astrand	64	void
200	astrand	66	xkeymap_init1(void)
201	matthewc	38	{
202	astrand	66	int i;
203	matthewc	38
204	astrand	66	/* Zeroing keymap */
205			for (i = 0; i < KEYMAP_SIZE; i++)
206			{
207			keymap[i].scancode = 0;
208			keymap[i].modifiers = 0;
209			}
210	matthewc	38
211			if (strcmp(keymapname, "none"))
212	astrand	66	{
213	matthewc	38	xkeymap_read(keymapname);
214	astrand	66	}
215
216	matthewc	38	}
217
218	astrand	66	/* After connecting and creating UI */
219			void
220			xkeymap_init2(void)
221	matthewc	38	{
222	astrand	66	unsigned int max_keycode;
223	astrand	73	XDisplayKeycodes(display, &min_keycode, (int *)&max_keycode);
224	astrand	66	}
225	matthewc	38
226	astrand	66
227			key_translation
228	astrand	69	xkeymap_translate_key(KeySym keysym, unsigned int keycode, unsigned int state)
229	astrand	66	{
230			key_translation tr = { 0, 0 };
231
232			tr = keymap[keysym & KEYMAP_MASK];
233
234	astrand	69	if (tr.modifiers & MapLocalStateMask)
235			{
236			/* The modifiers to send for this key should be obtained
237			from the local state. Currently, only shift is implemented. */
238			if (state & ShiftMask)
239			{
240			tr.modifiers = MapLeftShiftMask;
241			}
242			}
243
244	astrand	66	if (tr.scancode != 0)
245	matthewc	50	{
246	astrand	66	DEBUG_KBD
247			("Found key translation, scancode=0x%x, modifiers=0x%x\n",
248			tr.scancode, tr.modifiers);
249			return tr;
250	matthewc	50	}
251
252	astrand	66	printf("No translation for (keysym 0x%lx, %s)\n", keysym,
253			get_ksname(keysym));
254
255	matthewc	38	/* not in keymap, try to interpret the raw scancode */
256			if ((keycode >= min_keycode) && (keycode <= 0x60))
257			{
258	astrand	66	tr.scancode = keycode - min_keycode;
259			printf("Sending guessed scancode 0x%x\n", tr.scancode);
260	matthewc	38	}
261	astrand	66	else
262			{
263			printf("No good guess for keycode 0x%x found\n", keycode);
264			}
265	matthewc	38
266	astrand	66	return tr;
267	matthewc	38	}
268
269	astrand	64	uint16
270			xkeymap_translate_button(unsigned int button)
271	matthewc	38	{
272			switch (button)
273			{
274	astrand	64	case Button1: /* left */
275	matthewc	38	return MOUSE_FLAG_BUTTON1;
276	astrand	64	case Button2: /* middle */
277	matthewc	38	return MOUSE_FLAG_BUTTON3;
278	astrand	64	case Button3: /* right */
279	matthewc	38	return MOUSE_FLAG_BUTTON2;
280	jsorg71	67	case Button4: /* wheel up */
281			return MOUSE_FLAG_BUTTON4;
282			case Button5: /* wheel down */
283			return MOUSE_FLAG_BUTTON5;
284	matthewc	38	}
285
286			return 0;
287			}
288	astrand	66
289			char *
290			get_ksname(KeySym keysym)
291			{
292			char *ksname = NULL;
293
294			if (keysym == NoSymbol)
295			ksname = "NoSymbol";
296			else if (!(ksname = XKeysymToString(keysym)))
297			ksname = "(no name)";
298
299			return ksname;
300			}
301
302			BOOL
303			inhibit_key(KeySym keysym)
304			{
305			switch (keysym)
306			{
307			case XK_Caps_Lock:
308			return True;
309			break;
310			case XK_Multi_key:
311			return True;
312			break;
313			default:
314			break;
315			}
316			return False;
317			}
318
319			void
320			ensure_remote_modifiers(uint32 ev_time, key_translation tr)
321			{
322			/* If this key is a modifier, do nothing */
323			switch (tr.scancode)
324			{
325			case SCANCODE_CHAR_LSHIFT:
326			case SCANCODE_CHAR_RSHIFT:
327			case SCANCODE_CHAR_LCTRL:
328			case SCANCODE_CHAR_RCTRL:
329			case SCANCODE_CHAR_LALT:
330			case SCANCODE_CHAR_RALT:
331			case SCANCODE_CHAR_LWIN:
332			case SCANCODE_CHAR_RWIN:
333			case SCANCODE_CHAR_NUMLOCK:
334			return;
335			default:
336			break;
337			}
338
339			/* Shift */
340			if (MASK_HAS_BITS(tr.modifiers, MapShiftMask)
341			!= MASK_HAS_BITS(remote_modifier_state, MapShiftMask))
342			{
343			/* The remote modifier state is not correct */
344			if (MASK_HAS_BITS(tr.modifiers, MapShiftMask))
345			{
346			/* Needs this modifier. Send down. */
347			rdp_send_scancode(ev_time, RDP_KEYPRESS,
348			SCANCODE_CHAR_LSHIFT);
349			}
350			else
351			{
352			/* Should not use this modifier. Send up. */
353			rdp_send_scancode(ev_time, RDP_KEYRELEASE,
354			SCANCODE_CHAR_LSHIFT);
355			}
356			}
357
358			/* AltGr */
359			if (MASK_HAS_BITS(tr.modifiers, MapAltGrMask)
360			!= MASK_HAS_BITS(remote_modifier_state, MapAltGrMask))
361			{
362			/* The remote modifier state is not correct */
363			if (MASK_HAS_BITS(tr.modifiers, MapAltGrMask))
364			{
365			/* Needs this modifier. Send down. */
366			rdp_send_scancode(ev_time, RDP_KEYPRESS,
367			SCANCODE_CHAR_RALT);
368			}
369			else
370			{
371			/* Should not use this modifier. Send up. */
372			rdp_send_scancode(ev_time, RDP_KEYRELEASE,
373			SCANCODE_CHAR_RALT);
374			}
375			}
376
377			/* NumLock */
378			if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask)
379			!= MASK_HAS_BITS(remote_modifier_state, MapNumLockMask))
380			{
381			/* The remote modifier state is not correct */
382			DEBUG_KBD("Remote NumLock state is incorrect. Toggling\n");
383			if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask))
384			{
385			/* Needs this modifier. Toggle */
386			rdp_send_scancode(ev_time, RDP_KEYPRESS,
387			SCANCODE_CHAR_NUMLOCK);
388			rdp_send_scancode(ev_time, RDP_KEYRELEASE,
389			SCANCODE_CHAR_NUMLOCK);
390			}
391			else
392			{
393			/* Should not use this modifier. Toggle */
394			rdp_send_scancode(ev_time, RDP_KEYPRESS,
395			SCANCODE_CHAR_NUMLOCK);
396			rdp_send_scancode(ev_time, RDP_KEYRELEASE,
397			SCANCODE_CHAR_NUMLOCK);
398			}
399			}
400
401			}
402
403
404			static void
405			update_modifier_state(uint16 modifiers, BOOL pressed)
406			{
407
408			DEBUG_KBD("Before updating modifier_state:0x%x, pressed=0x%x\n",
409			remote_modifier_state, pressed);
410			switch (modifiers)
411			{
412			case SCANCODE_CHAR_LSHIFT:
413			MASK_CHANGE_BIT(remote_modifier_state,
414			MapLeftShiftMask, pressed);
415			break;
416			case SCANCODE_CHAR_RSHIFT:
417			MASK_CHANGE_BIT(remote_modifier_state,
418			MapRightShiftMask, pressed);
419			break;
420			case SCANCODE_CHAR_LCTRL:
421			MASK_CHANGE_BIT(remote_modifier_state,
422			MapLeftCtrlMask, pressed);
423			break;
424			case SCANCODE_CHAR_RCTRL:
425			MASK_CHANGE_BIT(remote_modifier_state,
426			MapRightCtrlMask, pressed);
427			break;
428			case SCANCODE_CHAR_LALT:
429			MASK_CHANGE_BIT(remote_modifier_state, MapLeftAltMask,
430			pressed);
431			break;
432			case SCANCODE_CHAR_RALT:
433			MASK_CHANGE_BIT(remote_modifier_state,
434			MapRightAltMask, pressed);
435			break;
436			case SCANCODE_CHAR_LWIN:
437			MASK_CHANGE_BIT(remote_modifier_state, MapLeftWinMask,
438			pressed);
439			break;
440			case SCANCODE_CHAR_RWIN:
441			MASK_CHANGE_BIT(remote_modifier_state,
442			MapRightWinMask, pressed);
443			break;
444			case SCANCODE_CHAR_NUMLOCK:
445			/* KeyReleases for NumLocks are sent immediately. Toggle the
446			modifier state only on Keypress */
447			if (pressed)
448			{
449			BOOL newNumLockState;
450			newNumLockState =
451			(MASK_HAS_BITS
452			(remote_modifier_state,
453			MapNumLockMask) == False);
454			MASK_CHANGE_BIT(remote_modifier_state,
455			MapNumLockMask,
456			newNumLockState);
457			}
458			break;
459			}
460			DEBUG_KBD("After updating modifier_state:0x%x\n",
461			remote_modifier_state);
462
463			}
464
465			/* Send keyboard input */
466			void
467			rdp_send_scancode(uint32 time, uint16 flags, uint16 scancode)
468			{
469			update_modifier_state(scancode, !(flags & RDP_KEYRELEASE));
470
471			if (scancode & SCANCODE_EXTENDED)
472			{
473			DEBUG_KBD("Sending extended scancode=0x%x, flags=0x%x\n",
474			scancode & ~SCANCODE_EXTENDED, flags);
475			rdp_send_input(time, RDP_INPUT_SCANCODE, flags \| KBD_FLAG_EXT,
476			scancode & ~SCANCODE_EXTENDED, 0);
477			}
478			else
479			{
480			DEBUG_KBD("Sending scancode=0x%x, flags=0x%x\n", scancode,
481			flags);
482			rdp_send_input(time, RDP_INPUT_SCANCODE, flags, scancode, 0);
483			}
484			}