Merge remote-tracking branch 'remotes/kraxel/tags/modules-20201022-pull-request'...
[qemu.git] / ui / kbd-state.c
1 /*
2 * This work is licensed under the terms of the GNU GPL, version 2 or
3 * (at your option) any later version. See the COPYING file in the
4 * top-level directory.
5 */
6 #include "qemu/osdep.h"
7 #include "qemu/bitmap.h"
8 #include "ui/console.h"
9 #include "ui/input.h"
10 #include "ui/kbd-state.h"
11
12 struct QKbdState {
13 QemuConsole *con;
14 int key_delay_ms;
15 DECLARE_BITMAP(keys, Q_KEY_CODE__MAX);
16 DECLARE_BITMAP(mods, QKBD_MOD__MAX);
17 };
18
19 static void qkbd_state_modifier_update(QKbdState *kbd,
20 QKeyCode qcode1, QKeyCode qcode2,
21 QKbdModifier mod)
22 {
23 if (test_bit(qcode1, kbd->keys) || test_bit(qcode2, kbd->keys)) {
24 set_bit(mod, kbd->mods);
25 } else {
26 clear_bit(mod, kbd->mods);
27 }
28 }
29
30 bool qkbd_state_modifier_get(QKbdState *kbd, QKbdModifier mod)
31 {
32 return test_bit(mod, kbd->mods);
33 }
34
35 bool qkbd_state_key_get(QKbdState *kbd, QKeyCode qcode)
36 {
37 return test_bit(qcode, kbd->keys);
38 }
39
40 void qkbd_state_key_event(QKbdState *kbd, QKeyCode qcode, bool down)
41 {
42 bool state = test_bit(qcode, kbd->keys);
43
44 if (down == false /* got key-up event */ &&
45 state == false /* key is not pressed */) {
46 /*
47 * Filter out suspicious key-up events.
48 *
49 * This allows simply sending along all key-up events, and
50 * this function will filter out everything where the
51 * corresponding key-down event wasn't sent to the guest, for
52 * example due to being a host hotkey.
53 *
54 * Note that key-down events on already pressed keys are *not*
55 * suspicious, those are keyboard autorepeat events.
56 */
57 return;
58 }
59
60 /* update key and modifier state */
61 if (down) {
62 set_bit(qcode, kbd->keys);
63 } else {
64 clear_bit(qcode, kbd->keys);
65 }
66 switch (qcode) {
67 case Q_KEY_CODE_SHIFT:
68 case Q_KEY_CODE_SHIFT_R:
69 qkbd_state_modifier_update(kbd, Q_KEY_CODE_SHIFT, Q_KEY_CODE_SHIFT_R,
70 QKBD_MOD_SHIFT);
71 break;
72 case Q_KEY_CODE_CTRL:
73 case Q_KEY_CODE_CTRL_R:
74 qkbd_state_modifier_update(kbd, Q_KEY_CODE_CTRL, Q_KEY_CODE_CTRL_R,
75 QKBD_MOD_CTRL);
76 break;
77 case Q_KEY_CODE_ALT:
78 qkbd_state_modifier_update(kbd, Q_KEY_CODE_ALT, Q_KEY_CODE_ALT,
79 QKBD_MOD_ALT);
80 break;
81 case Q_KEY_CODE_ALT_R:
82 qkbd_state_modifier_update(kbd, Q_KEY_CODE_ALT_R, Q_KEY_CODE_ALT_R,
83 QKBD_MOD_ALTGR);
84 break;
85 case Q_KEY_CODE_CAPS_LOCK:
86 if (down) {
87 change_bit(QKBD_MOD_CAPSLOCK, kbd->mods);
88 }
89 break;
90 case Q_KEY_CODE_NUM_LOCK:
91 if (down) {
92 change_bit(QKBD_MOD_NUMLOCK, kbd->mods);
93 }
94 break;
95 default:
96 /* keep gcc happy */
97 break;
98 }
99
100 /* send to guest */
101 if (qemu_console_is_graphic(kbd->con)) {
102 qemu_input_event_send_key_qcode(kbd->con, qcode, down);
103 if (kbd->key_delay_ms) {
104 qemu_input_event_send_key_delay(kbd->key_delay_ms);
105 }
106 }
107 }
108
109 void qkbd_state_lift_all_keys(QKbdState *kbd)
110 {
111 int qcode;
112
113 for (qcode = 0; qcode < Q_KEY_CODE__MAX; qcode++) {
114 if (test_bit(qcode, kbd->keys)) {
115 qkbd_state_key_event(kbd, qcode, false);
116 }
117 }
118 }
119
120 void qkbd_state_set_delay(QKbdState *kbd, int delay_ms)
121 {
122 kbd->key_delay_ms = delay_ms;
123 }
124
125 void qkbd_state_free(QKbdState *kbd)
126 {
127 g_free(kbd);
128 }
129
130 QKbdState *qkbd_state_init(QemuConsole *con)
131 {
132 QKbdState *kbd = g_new0(QKbdState, 1);
133
134 kbd->con = con;
135
136 return kbd;
137 }