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qemu/ui/input.c
Eric Blake 32bafa8fdd qapi: Don't special-case simple union wrappers 
Simple unions were carrying a special case that hid their 'data'
QMP member from the resulting C struct, via the hack method
QAPISchemaObjectTypeVariant.simple_union_type().  But by using
the work we started by unboxing flat union and alternate
branches, coupled with the ability to visit the members of an
implicit type, we can now expose the simple union's implicit
type in qapi-types.h:

| struct q_obj_ImageInfoSpecificQCow2_wrapper {
|     ImageInfoSpecificQCow2 *data;
| };
|
| struct q_obj_ImageInfoSpecificVmdk_wrapper {
|     ImageInfoSpecificVmdk *data;
| };
...
| struct ImageInfoSpecific {
|     ImageInfoSpecificKind type;
|     union { /* union tag is @type */
|         void *data;
|-        ImageInfoSpecificQCow2 *qcow2;
|-        ImageInfoSpecificVmdk *vmdk;
|+        q_obj_ImageInfoSpecificQCow2_wrapper qcow2;
|+        q_obj_ImageInfoSpecificVmdk_wrapper vmdk;
|     } u;
| };

Doing this removes asymmetry between QAPI's QMP side and its
C side (both sides now expose 'data'), and means that the
treatment of a simple union as sugar for a flat union is now
equivalent in both languages (previously the two approaches used
a different layer of dereferencing, where the simple union could
be converted to a flat union with equivalent C layout but
different {} on the wire, or to an equivalent QMP wire form
but with different C representation).  Using the implicit type
also lets us get rid of the simple_union_type() hack.

Of course, now all clients of simple unions have to adjust from
using su->u.member to using su->u.member.data; while this touches
a number of files in the tree, some earlier cleanup patches
helped minimize the change to the initialization of a temporary
variable rather than every single member access.  The generated
qapi-visit.c code is also affected by the layout change:

|@@ -7393,10 +7393,10 @@ void visit_type_ImageInfoSpecific_member
|     }
|     switch (obj->type) {
|     case IMAGE_INFO_SPECIFIC_KIND_QCOW2:
|-        visit_type_ImageInfoSpecificQCow2(v, "data", &obj->u.qcow2, &err);
|+        visit_type_q_obj_ImageInfoSpecificQCow2_wrapper_members(v, &obj->u.qcow2, &err);
|         break;
|     case IMAGE_INFO_SPECIFIC_KIND_VMDK:
|-        visit_type_ImageInfoSpecificVmdk(v, "data", &obj->u.vmdk, &err);
|+        visit_type_q_obj_ImageInfoSpecificVmdk_wrapper_members(v, &obj->u.vmdk, &err);
|         break;
|     default:
|         abort();

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1458254921-17042-13-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-03-18 10:29:26 +01:00

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#include "qemu/osdep.h"
#include "hw/qdev.h"
#include "sysemu/sysemu.h"
#include "qapi-types.h"
#include "qemu/error-report.h"
#include "qmp-commands.h"
#include "trace.h"
#include "ui/input.h"
#include "ui/console.h"
#include "sysemu/replay.h"
struct QemuInputHandlerState {
DeviceState *dev;
QemuInputHandler *handler;
int id;
int events;
QemuConsole *con;
QTAILQ_ENTRY(QemuInputHandlerState) node;
};
typedef struct QemuInputEventQueue QemuInputEventQueue;
struct QemuInputEventQueue {
enum {
QEMU_INPUT_QUEUE_DELAY = 1,
QEMU_INPUT_QUEUE_EVENT,
QEMU_INPUT_QUEUE_SYNC,
} type;
QEMUTimer *timer;
uint32_t delay_ms;
QemuConsole *src;
InputEvent *evt;
QTAILQ_ENTRY(QemuInputEventQueue) node;
};
static QTAILQ_HEAD(, QemuInputHandlerState) handlers =
QTAILQ_HEAD_INITIALIZER(handlers);
static NotifierList mouse_mode_notifiers =
NOTIFIER_LIST_INITIALIZER(mouse_mode_notifiers);
static QTAILQ_HEAD(QemuInputEventQueueHead, QemuInputEventQueue) kbd_queue =
QTAILQ_HEAD_INITIALIZER(kbd_queue);
static QEMUTimer *kbd_timer;
static uint32_t kbd_default_delay_ms = 10;
QemuInputHandlerState *qemu_input_handler_register(DeviceState *dev,
QemuInputHandler *handler)
{
QemuInputHandlerState *s = g_new0(QemuInputHandlerState, 1);
static int id = 1;
s->dev = dev;
s->handler = handler;
s->id = id++;
QTAILQ_INSERT_TAIL(&handlers, s, node);
qemu_input_check_mode_change();
return s;
}
void qemu_input_handler_activate(QemuInputHandlerState *s)
{
QTAILQ_REMOVE(&handlers, s, node);
QTAILQ_INSERT_HEAD(&handlers, s, node);
qemu_input_check_mode_change();
}
void qemu_input_handler_deactivate(QemuInputHandlerState *s)
{
QTAILQ_REMOVE(&handlers, s, node);
QTAILQ_INSERT_TAIL(&handlers, s, node);
qemu_input_check_mode_change();
}
void qemu_input_handler_unregister(QemuInputHandlerState *s)
{
QTAILQ_REMOVE(&handlers, s, node);
g_free(s);
qemu_input_check_mode_change();
}
void qemu_input_handler_bind(QemuInputHandlerState *s,
const char *device_id, int head,
Error **errp)
{
QemuConsole *con;
Error *err = NULL;
con = qemu_console_lookup_by_device_name(device_id, head, &err);
if (err) {
error_propagate(errp, err);
return;
}
s->con = con;
}
static QemuInputHandlerState*
qemu_input_find_handler(uint32_t mask, QemuConsole *con)
{
QemuInputHandlerState *s;
QTAILQ_FOREACH(s, &handlers, node) {
if (s->con == NULL || s->con != con) {
continue;
}
if (mask & s->handler->mask) {
return s;
}
}
QTAILQ_FOREACH(s, &handlers, node) {
if (s->con != NULL) {
continue;
}
if (mask & s->handler->mask) {
return s;
}
}
return NULL;
}
void qmp_input_send_event(bool has_device, const char *device,
bool has_head, int64_t head,
InputEventList *events, Error **errp)
{
InputEventList *e;
QemuConsole *con;
Error *err = NULL;
con = NULL;
if (has_device) {
if (!has_head) {
head = 0;
}
con = qemu_console_lookup_by_device_name(device, head, &err);
if (err) {
error_propagate(errp, err);
return;
}
}
if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
error_setg(errp, "VM not running");
return;
}
for (e = events; e != NULL; e = e->next) {
InputEvent *event = e->value;
if (!qemu_input_find_handler(1 << event->type, con)) {
error_setg(errp, "Input handler not found for "
"event type %s",
InputEventKind_lookup[event->type]);
return;
}
}
for (e = events; e != NULL; e = e->next) {
InputEvent *event = e->value;
qemu_input_event_send(con, event);
}
qemu_input_event_sync();
}
static void qemu_input_transform_abs_rotate(InputEvent *evt)
{
InputMoveEvent *move = evt->u.abs.data;
switch (graphic_rotate) {
case 90:
if (move->axis == INPUT_AXIS_X) {
move->axis = INPUT_AXIS_Y;
} else if (move->axis == INPUT_AXIS_Y) {
move->axis = INPUT_AXIS_X;
move->value = INPUT_EVENT_ABS_SIZE - 1 - move->value;
}
break;
case 180:
move->value = INPUT_EVENT_ABS_SIZE - 1 - move->value;
break;
case 270:
if (move->axis == INPUT_AXIS_X) {
move->axis = INPUT_AXIS_Y;
move->value = INPUT_EVENT_ABS_SIZE - 1 - move->value;
} else if (move->axis == INPUT_AXIS_Y) {
move->axis = INPUT_AXIS_X;
}
break;
}
}
static void qemu_input_event_trace(QemuConsole *src, InputEvent *evt)
{
const char *name;
int qcode, idx = -1;
InputKeyEvent *key;
InputBtnEvent *btn;
InputMoveEvent *move;
if (src) {
idx = qemu_console_get_index(src);
}
switch (evt->type) {
case INPUT_EVENT_KIND_KEY:
key = evt->u.key.data;
switch (key->key->type) {
case KEY_VALUE_KIND_NUMBER:
qcode = qemu_input_key_number_to_qcode(key->key->u.number.data);
name = QKeyCode_lookup[qcode];
trace_input_event_key_number(idx, key->key->u.number.data,
name, key->down);
break;
case KEY_VALUE_KIND_QCODE:
name = QKeyCode_lookup[key->key->u.qcode.data];
trace_input_event_key_qcode(idx, name, key->down);
break;
case KEY_VALUE_KIND__MAX:
/* keep gcc happy */
break;
}
break;
case INPUT_EVENT_KIND_BTN:
btn = evt->u.btn.data;
name = InputButton_lookup[btn->button];
trace_input_event_btn(idx, name, btn->down);
break;
case INPUT_EVENT_KIND_REL:
move = evt->u.rel.data;
name = InputAxis_lookup[move->axis];
trace_input_event_rel(idx, name, move->value);
break;
case INPUT_EVENT_KIND_ABS:
move = evt->u.abs.data;
name = InputAxis_lookup[move->axis];
trace_input_event_abs(idx, name, move->value);
break;
case INPUT_EVENT_KIND__MAX:
/* keep gcc happy */
break;
}
}
static void qemu_input_queue_process(void *opaque)
{
struct QemuInputEventQueueHead *queue = opaque;
QemuInputEventQueue *item;
g_assert(!QTAILQ_EMPTY(queue));
item = QTAILQ_FIRST(queue);
g_assert(item->type == QEMU_INPUT_QUEUE_DELAY);
QTAILQ_REMOVE(queue, item, node);
g_free(item);
while (!QTAILQ_EMPTY(queue)) {
item = QTAILQ_FIRST(queue);
switch (item->type) {
case QEMU_INPUT_QUEUE_DELAY:
timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)
+ item->delay_ms);
return;
case QEMU_INPUT_QUEUE_EVENT:
qemu_input_event_send(item->src, item->evt);
qapi_free_InputEvent(item->evt);
break;
case QEMU_INPUT_QUEUE_SYNC:
qemu_input_event_sync();
break;
}
QTAILQ_REMOVE(queue, item, node);
g_free(item);
}
}
static void qemu_input_queue_delay(struct QemuInputEventQueueHead *queue,
QEMUTimer *timer, uint32_t delay_ms)
{
QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
bool start_timer = QTAILQ_EMPTY(queue);
item->type = QEMU_INPUT_QUEUE_DELAY;
item->delay_ms = delay_ms;
item->timer = timer;
QTAILQ_INSERT_TAIL(queue, item, node);
if (start_timer) {
timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)
+ item->delay_ms);
}
}
static void qemu_input_queue_event(struct QemuInputEventQueueHead *queue,
QemuConsole *src, InputEvent *evt)
{
QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
item->type = QEMU_INPUT_QUEUE_EVENT;
item->src = src;
item->evt = evt;
QTAILQ_INSERT_TAIL(queue, item, node);
}
static void qemu_input_queue_sync(struct QemuInputEventQueueHead *queue)
{
QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
item->type = QEMU_INPUT_QUEUE_SYNC;
QTAILQ_INSERT_TAIL(queue, item, node);
}
void qemu_input_event_send_impl(QemuConsole *src, InputEvent *evt)
{
QemuInputHandlerState *s;
qemu_input_event_trace(src, evt);
/* pre processing */
if (graphic_rotate && (evt->type == INPUT_EVENT_KIND_ABS)) {
qemu_input_transform_abs_rotate(evt);
}
/* send event */
s = qemu_input_find_handler(1 << evt->type, src);
if (!s) {
return;
}
s->handler->event(s->dev, src, evt);
s->events++;
}
void qemu_input_event_send(QemuConsole *src, InputEvent *evt)
{
if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
return;
}
replay_input_event(src, evt);
}
void qemu_input_event_sync_impl(void)
{
QemuInputHandlerState *s;
trace_input_event_sync();
QTAILQ_FOREACH(s, &handlers, node) {
if (!s->events) {
continue;
}
if (s->handler->sync) {
s->handler->sync(s->dev);
}
s->events = 0;
}
}
void qemu_input_event_sync(void)
{
if (!runstate_is_running() && !runstate_check(RUN_STATE_SUSPENDED)) {
return;
}
replay_input_sync_event();
}
InputEvent *qemu_input_event_new_key(KeyValue *key, bool down)
{
InputEvent *evt = g_new0(InputEvent, 1);
evt->u.key.data = g_new0(InputKeyEvent, 1);
evt->type = INPUT_EVENT_KIND_KEY;
evt->u.key.data->key = key;
evt->u.key.data->down = down;
return evt;
}
void qemu_input_event_send_key(QemuConsole *src, KeyValue *key, bool down)
{
InputEvent *evt;
evt = qemu_input_event_new_key(key, down);
if (QTAILQ_EMPTY(&kbd_queue)) {
qemu_input_event_send(src, evt);
qemu_input_event_sync();
qapi_free_InputEvent(evt);
} else {
qemu_input_queue_event(&kbd_queue, src, evt);
qemu_input_queue_sync(&kbd_queue);
}
}
void qemu_input_event_send_key_number(QemuConsole *src, int num, bool down)
{
KeyValue *key = g_new0(KeyValue, 1);
key->type = KEY_VALUE_KIND_NUMBER;
key->u.number.data = num;
qemu_input_event_send_key(src, key, down);
}
void qemu_input_event_send_key_qcode(QemuConsole *src, QKeyCode q, bool down)
{
KeyValue *key = g_new0(KeyValue, 1);
key->type = KEY_VALUE_KIND_QCODE;
key->u.qcode.data = q;
qemu_input_event_send_key(src, key, down);
}
void qemu_input_event_send_key_delay(uint32_t delay_ms)
{
if (!kbd_timer) {
kbd_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, qemu_input_queue_process,
&kbd_queue);
}
qemu_input_queue_delay(&kbd_queue, kbd_timer,
delay_ms ? delay_ms : kbd_default_delay_ms);
}
InputEvent *qemu_input_event_new_btn(InputButton btn, bool down)
{
InputEvent *evt = g_new0(InputEvent, 1);
evt->u.btn.data = g_new0(InputBtnEvent, 1);
evt->type = INPUT_EVENT_KIND_BTN;
evt->u.btn.data->button = btn;
evt->u.btn.data->down = down;
return evt;
}
void qemu_input_queue_btn(QemuConsole *src, InputButton btn, bool down)
{
InputEvent *evt;
evt = qemu_input_event_new_btn(btn, down);
qemu_input_event_send(src, evt);
qapi_free_InputEvent(evt);
}
void qemu_input_update_buttons(QemuConsole *src, uint32_t *button_map,
uint32_t button_old, uint32_t button_new)
{
InputButton btn;
uint32_t mask;
for (btn = 0; btn < INPUT_BUTTON__MAX; btn++) {
mask = button_map[btn];
if ((button_old & mask) == (button_new & mask)) {
continue;
}
qemu_input_queue_btn(src, btn, button_new & mask);
}
}
bool qemu_input_is_absolute(void)
{
QemuInputHandlerState *s;
s = qemu_input_find_handler(INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS,
NULL);
return (s != NULL) && (s->handler->mask & INPUT_EVENT_MASK_ABS);
}
int qemu_input_scale_axis(int value, int size_in, int size_out)
{
if (size_in < 2) {
return size_out / 2;
}
return (int64_t)value * (size_out - 1) / (size_in - 1);
}
InputEvent *qemu_input_event_new_move(InputEventKind kind,
InputAxis axis, int value)
{
InputEvent *evt = g_new0(InputEvent, 1);
InputMoveEvent *move = g_new0(InputMoveEvent, 1);
evt->type = kind;
evt->u.rel.data = move; /* evt->u.rel is the same as evt->u.abs */
move->axis = axis;
move->value = value;
return evt;
}
void qemu_input_queue_rel(QemuConsole *src, InputAxis axis, int value)
{
InputEvent *evt;
evt = qemu_input_event_new_move(INPUT_EVENT_KIND_REL, axis, value);
qemu_input_event_send(src, evt);
qapi_free_InputEvent(evt);
}
void qemu_input_queue_abs(QemuConsole *src, InputAxis axis, int value, int size)
{
InputEvent *evt;
int scaled = qemu_input_scale_axis(value, size, INPUT_EVENT_ABS_SIZE);
evt = qemu_input_event_new_move(INPUT_EVENT_KIND_ABS, axis, scaled);
qemu_input_event_send(src, evt);
qapi_free_InputEvent(evt);
}
void qemu_input_check_mode_change(void)
{
static int current_is_absolute;
int is_absolute;
is_absolute = qemu_input_is_absolute();
if (is_absolute != current_is_absolute) {
trace_input_mouse_mode(is_absolute);
notifier_list_notify(&mouse_mode_notifiers, NULL);
}
current_is_absolute = is_absolute;
}
void qemu_add_mouse_mode_change_notifier(Notifier *notify)
{
notifier_list_add(&mouse_mode_notifiers, notify);
}
void qemu_remove_mouse_mode_change_notifier(Notifier *notify)
{
notifier_remove(notify);
}
MouseInfoList *qmp_query_mice(Error **errp)
{
MouseInfoList *mice_list = NULL;
MouseInfoList *info;
QemuInputHandlerState *s;
bool current = true;
QTAILQ_FOREACH(s, &handlers, node) {
if (!(s->handler->mask &
(INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS))) {
continue;
}
info = g_new0(MouseInfoList, 1);
info->value = g_new0(MouseInfo, 1);
info->value->index = s->id;
info->value->name = g_strdup(s->handler->name);
info->value->absolute = s->handler->mask & INPUT_EVENT_MASK_ABS;
info->value->current = current;
current = false;
info->next = mice_list;
mice_list = info;
}
return mice_list;
}
void hmp_mouse_set(Monitor *mon, const QDict *qdict)
{
QemuInputHandlerState *s;
int index = qdict_get_int(qdict, "index");
int found = 0;
QTAILQ_FOREACH(s, &handlers, node) {
if (s->id != index) {
continue;
}
if (!(s->handler->mask & (INPUT_EVENT_MASK_REL |
INPUT_EVENT_MASK_ABS))) {
error_report("Input device '%s' is not a mouse", s->handler->name);
return;
}
found = 1;
qemu_input_handler_activate(s);
break;
}
if (!found) {
error_report("Mouse at index '%d' not found", index);
}
qemu_input_check_mode_change();
}
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