diff options
| -rw-r--r-- | include/ui/kbd-state.h | 101 | ||||
| -rw-r--r-- | ui/Makefile.objs | 2 | ||||
| -rw-r--r-- | ui/kbd-state.c | 130 |
3 files changed, 232 insertions, 1 deletions
diff --git a/include/ui/kbd-state.h b/include/ui/kbd-state.h new file mode 100644 index 0000000..d878335 --- /dev/null +++ b/include/ui/kbd-state.h @@ -0,0 +1,101 @@ +/* + * This work is licensed under the terms of the GNU GPL, version 2 or + * (at your option) any later version. See the COPYING file in the + * top-level directory. + */ +#ifndef QEMU_UI_KBD_STATE_H +#define QEMU_UI_KBD_STATE_H 1 + +#include "qapi/qapi-types-ui.h" + +typedef enum QKbdModifier QKbdModifier; + +enum QKbdModifier { + QKBD_MOD_NONE = 0, + + QKBD_MOD_SHIFT, + QKBD_MOD_CTRL, + QKBD_MOD_ALT, + QKBD_MOD_ALTGR, + + QKBD_MOD_NUMLOCK, + QKBD_MOD_CAPSLOCK, + + QKBD_MOD__MAX +}; + +typedef struct QKbdState QKbdState; + +/** + * qkbd_state_init: init keyboard state tracker. + * + * Allocates and initializes keyboard state struct. + * + * @con: QemuConsole for this state tracker. Gets passed down to + * qemu_input_*() functions when sending key events to the guest. + */ +QKbdState *qkbd_state_init(QemuConsole *con); + +/** + * qkbd_state_free: free keyboard tracker state. + * + * @kbd: state tracker state. + */ +void qkbd_state_free(QKbdState *kbd); + +/** + * qkbd_state_key_event: process key event. + * + * Update keyboard state, send event to the guest. + * + * This function takes care to not send suspious events (keyup event + * for a key not pressed for example). + * + * @kbd: state tracker state. + * @qcode: the key pressed or released. + * @down: true for key down events, false otherwise. + */ +void qkbd_state_key_event(QKbdState *kbd, QKeyCode qcode, bool down); + +/** + * qkbd_state_set_delay: set key press delay. + * + * When set the specified delay will be added after each key event, + * using qemu_input_event_send_key_delay(). + * + * @kbd: state tracker state. + * @delay_ms: the delay in miliseconds. + */ +void qkbd_state_set_delay(QKbdState *kbd, int delay_ms); + +/** + * qkbd_state_key_get: get key state. + * + * Returns true when the key is down. + * + * @kbd: state tracker state. + * @qcode: the key to query. + */ +bool qkbd_state_key_get(QKbdState *kbd, QKeyCode qcode); + +/** + * qkbd_state_modifier_get: get modifier state. + * + * Returns true when the modifier is active. + * + * @kbd: state tracker state. + * @mod: the modifier to query. + */ +bool qkbd_state_modifier_get(QKbdState *kbd, QKbdModifier mod); + +/** + * qkbd_state_lift_all_keys: lift all pressed keys. + * + * This sends key up events to the guest for all keys which are in + * down state. + * + * @kbd: state tracker state. + */ +void qkbd_state_lift_all_keys(QKbdState *kbd); + +#endif /* QEMU_UI_KBD_STATE_H */ diff --git a/ui/Makefile.objs b/ui/Makefile.objs index 9b6f0c6..7f8b3da 100644 --- a/ui/Makefile.objs +++ b/ui/Makefile.objs @@ -8,7 +8,7 @@ vnc-obj-y += vnc-ws.o vnc-obj-y += vnc-jobs.o common-obj-y += keymaps.o console.o cursor.o qemu-pixman.o -common-obj-y += input.o input-keymap.o input-legacy.o +common-obj-y += input.o input-keymap.o input-legacy.o kbd-state.o common-obj-$(CONFIG_LINUX) += input-linux.o common-obj-$(CONFIG_SPICE) += spice-core.o spice-input.o spice-display.o common-obj-$(CONFIG_COCOA) += cocoa.o diff --git a/ui/kbd-state.c b/ui/kbd-state.c new file mode 100644 index 0000000..ac14add --- /dev/null +++ b/ui/kbd-state.c @@ -0,0 +1,130 @@ +/* + * This work is licensed under the terms of the GNU GPL, version 2 or + * (at your option) any later version. See the COPYING file in the + * top-level directory. + */ +#include "qemu/osdep.h" +#include "qemu/bitmap.h" +#include "qemu/queue.h" +#include "ui/console.h" +#include "ui/input.h" +#include "ui/kbd-state.h" + +struct QKbdState { + QemuConsole *con; + int key_delay_ms; + DECLARE_BITMAP(keys, Q_KEY_CODE__MAX); + DECLARE_BITMAP(mods, QKBD_MOD__MAX); +}; + +static void qkbd_state_modifier_update(QKbdState *kbd, + QKeyCode qcode1, QKeyCode qcode2, + QKbdModifier mod) +{ + if (test_bit(qcode1, kbd->keys) || test_bit(qcode2, kbd->keys)) { + set_bit(mod, kbd->mods); + } else { + clear_bit(mod, kbd->mods); + } +} + +bool qkbd_state_modifier_get(QKbdState *kbd, QKbdModifier mod) +{ + return test_bit(mod, kbd->mods); +} + +bool qkbd_state_key_get(QKbdState *kbd, QKeyCode qcode) +{ + return test_bit(qcode, kbd->keys); +} + +void qkbd_state_key_event(QKbdState *kbd, QKeyCode qcode, bool down) +{ + bool state = test_bit(qcode, kbd->keys); + + if (state == down) { + /* + * Filter out events which don't change the keyboard state. + * + * Most notably this allows to simply send along all key-up + * events, and this function will filter out everything where + * the corresponding key-down event wasn't send to the guest, + * for example due to being a host hotkey. + */ + return; + } + + /* update key and modifier state */ + change_bit(qcode, kbd->keys); + switch (qcode) { + case Q_KEY_CODE_SHIFT: + case Q_KEY_CODE_SHIFT_R: + qkbd_state_modifier_update(kbd, Q_KEY_CODE_SHIFT, Q_KEY_CODE_SHIFT_R, + QKBD_MOD_SHIFT); + break; + case Q_KEY_CODE_CTRL: + case Q_KEY_CODE_CTRL_R: + qkbd_state_modifier_update(kbd, Q_KEY_CODE_CTRL, Q_KEY_CODE_CTRL_R, + QKBD_MOD_CTRL); + break; + case Q_KEY_CODE_ALT: + qkbd_state_modifier_update(kbd, Q_KEY_CODE_ALT, Q_KEY_CODE_ALT, + QKBD_MOD_ALT); + break; + case Q_KEY_CODE_ALT_R: + qkbd_state_modifier_update(kbd, Q_KEY_CODE_ALT_R, Q_KEY_CODE_ALT_R, + QKBD_MOD_ALTGR); + break; + case Q_KEY_CODE_CAPS_LOCK: + if (down) { + change_bit(QKBD_MOD_CAPSLOCK, kbd->mods); + } + break; + case Q_KEY_CODE_NUM_LOCK: + if (down) { + change_bit(QKBD_MOD_NUMLOCK, kbd->mods); + } + break; + default: + /* keep gcc happy */ + break; + } + + /* send to guest */ + if (qemu_console_is_graphic(kbd->con)) { + qemu_input_event_send_key_qcode(kbd->con, qcode, down); + if (kbd->key_delay_ms) { + qemu_input_event_send_key_delay(kbd->key_delay_ms); + } + } +} + +void qkbd_state_lift_all_keys(QKbdState *kbd) +{ + int qcode; + + for (qcode = 0; qcode < Q_KEY_CODE__MAX; qcode++) { + if (test_bit(qcode, kbd->keys)) { + qkbd_state_key_event(kbd, qcode, false); + } + } +} + +void qkbd_state_set_delay(QKbdState *kbd, int delay_ms) +{ + kbd->key_delay_ms = delay_ms; +} + +void qkbd_state_free(QKbdState *kbd) +{ + g_free(kbd); +} + +QKbdState *qkbd_state_init(QemuConsole *con) +{ + QKbdState *kbd = g_new0(QKbdState, 1); + + kbd->con = con; + + return kbd; +} |