| 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 "standard-headers/linux/input-event-codes.h" |
| 9 | #include "ui/console.h" |
| 10 | #include "ui/input.h" |
| 11 | #include "ui/kbd-state.h" |
| 12 | |
| 13 | struct QKbdState { |
| 14 | QemuConsole *con; |
| 15 | int key_delay_ms; |
| 16 | DECLARE_BITMAP(keys, KEY_CNT); |
| 17 | DECLARE_BITMAP(mods, QKBD_MOD__MAX); |
| 18 | }; |
| 19 | |
| 20 | static void qkbd_state_modifier_update(QKbdState *kbd, |
| 21 | unsigned int lnx1, unsigned int lnx2, |
| 22 | QKbdModifier mod) |
| 23 | { |
| 24 | if (test_bit(lnx1, kbd->keys) || test_bit(lnx2, kbd->keys)) { |
| 25 | set_bit(mod, kbd->mods); |
| 26 | } else { |
| 27 | clear_bit(mod, kbd->mods); |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | bool qkbd_state_modifier_get(QKbdState *kbd, QKbdModifier mod) |
| 32 | { |
| 33 | return test_bit(mod, kbd->mods); |
| 34 | } |
| 35 | |
| 36 | bool qkbd_state_key_get(QKbdState *kbd, unsigned int lnx) |
| 37 | { |
| 38 | return lnx < KEY_CNT && test_bit(lnx, kbd->keys); |
| 39 | } |
| 40 | |
| 41 | void qkbd_state_key_event(QKbdState *kbd, unsigned int lnx, bool down) |
| 42 | { |
| 43 | bool state; |
| 44 | |
| 45 | if (lnx >= KEY_CNT) { |
| 46 | return; |
| 47 | } |
| 48 | |
| 49 | state = test_bit(lnx, kbd->keys); |
| 50 | |
| 51 | if (down == false /* got key-up event */ && |
| 52 | state == false /* key is not pressed */) { |
| 53 | /* |
| 54 | * Filter out suspicious key-up events. |
| 55 | * |
| 56 | * This allows simply sending along all key-up events, and |
| 57 | * this function will filter out everything where the |
| 58 | * corresponding key-down event wasn't sent to the guest, for |
| 59 | * example due to being a host hotkey. |
| 60 | * |
| 61 | * Note that key-down events on already pressed keys are *not* |
| 62 | * suspicious, those are keyboard autorepeat events. |
| 63 | */ |
| 64 | return; |
| 65 | } |
| 66 | |
| 67 | /* update key and modifier state */ |
| 68 | if (down) { |
| 69 | set_bit(lnx, kbd->keys); |
| 70 | } else { |
| 71 | clear_bit(lnx, kbd->keys); |
| 72 | } |
| 73 | switch (lnx) { |
| 74 | case KEY_LEFTSHIFT: |
| 75 | case KEY_RIGHTSHIFT: |
| 76 | qkbd_state_modifier_update(kbd, KEY_LEFTSHIFT, KEY_RIGHTSHIFT, |
| 77 | QKBD_MOD_SHIFT); |
| 78 | break; |
| 79 | case KEY_LEFTCTRL: |
| 80 | case KEY_RIGHTCTRL: |
| 81 | qkbd_state_modifier_update(kbd, KEY_LEFTCTRL, KEY_RIGHTCTRL, |
| 82 | QKBD_MOD_CTRL); |
| 83 | break; |
| 84 | case KEY_LEFTALT: |
| 85 | qkbd_state_modifier_update(kbd, KEY_LEFTALT, KEY_LEFTALT, |
| 86 | QKBD_MOD_ALT); |
| 87 | break; |
| 88 | case KEY_RIGHTALT: |
| 89 | qkbd_state_modifier_update(kbd, KEY_RIGHTALT, KEY_RIGHTALT, |
| 90 | QKBD_MOD_ALTGR); |
| 91 | break; |
| 92 | case KEY_CAPSLOCK: |
| 93 | if (down) { |
| 94 | change_bit(QKBD_MOD_CAPSLOCK, kbd->mods); |
| 95 | } |
| 96 | break; |
| 97 | case KEY_NUMLOCK: |
| 98 | if (down) { |
| 99 | change_bit(QKBD_MOD_NUMLOCK, kbd->mods); |
| 100 | } |
| 101 | break; |
| 102 | default: |
| 103 | /* keep gcc happy */ |
| 104 | break; |
| 105 | } |
| 106 | |
| 107 | /* send to guest */ |
| 108 | if (qemu_console_is_graphic(kbd->con)) { |
| 109 | qemu_input_event_send_key_linux(kbd->con, lnx, down); |
| 110 | if (kbd->key_delay_ms) { |
| 111 | qemu_input_event_send_key_delay(kbd->key_delay_ms); |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | void qkbd_state_lift_all_keys(QKbdState *kbd) |
| 117 | { |
| 118 | unsigned int lnx; |
| 119 | |
| 120 | for (lnx = 0; lnx < KEY_CNT; lnx++) { |
| 121 | if (test_bit(lnx, kbd->keys)) { |
| 122 | qkbd_state_key_event(kbd, lnx, false); |
| 123 | } |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | void qkbd_state_switch_console(QKbdState *kbd, QemuConsole *con) |
| 128 | { |
| 129 | qkbd_state_lift_all_keys(kbd); |
| 130 | kbd->con = con; |
| 131 | } |
| 132 | |
| 133 | void qkbd_state_set_delay(QKbdState *kbd, int delay_ms) |
| 134 | { |
| 135 | kbd->key_delay_ms = delay_ms; |
| 136 | } |
| 137 | |
| 138 | void qkbd_state_free(QKbdState *kbd) |
| 139 | { |
| 140 | g_free(kbd); |
| 141 | } |
| 142 | |
| 143 | QKbdState *qkbd_state_init(QemuConsole *con) |
| 144 | { |
| 145 | QKbdState *kbd = g_new0(QKbdState, 1); |
| 146 | |
| 147 | kbd->con = con; |
| 148 | |
| 149 | return kbd; |
| 150 | } |