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#include "qemu/osdep.h"
#include "system/runstate.h"
#include "ui/clipboard.h"
#include "trace.h"
static NotifierList clipboard_notifiers =
NOTIFIER_LIST_INITIALIZER(clipboard_notifiers);
static QemuClipboardInfo *cbinfo[QEMU_CLIPBOARD_SELECTION__COUNT];
static VMChangeStateEntry *cb_change_state_entry = NULL;
static bool cb_reset_serial_on_resume = false;
static const VMStateDescription vmstate_cbcontent = {
.name = "clipboard/content",
.version_id = 0,
.minimum_version_id = 0,
.fields = (const VMStateField[]) {
VMSTATE_BOOL(available, QemuClipboardContent),
VMSTATE_BOOL(requested, QemuClipboardContent),
VMSTATE_UINT32(size, QemuClipboardContent),
VMSTATE_VBUFFER_ALLOC_UINT32(data, QemuClipboardContent, 0, 0, size),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_cbinfo = {
.name = "clipboard",
.version_id = 0,
.minimum_version_id = 0,
.fields = (const VMStateField[]) {
VMSTATE_INT32(selection, QemuClipboardInfo),
VMSTATE_BOOL(has_serial, QemuClipboardInfo),
VMSTATE_UINT32(serial, QemuClipboardInfo),
VMSTATE_STRUCT_ARRAY(types, QemuClipboardInfo, QEMU_CLIPBOARD_TYPE__COUNT, 0, vmstate_cbcontent, QemuClipboardContent),
VMSTATE_END_OF_LIST()
}
};
static void qemu_clipboard_change_state(void *opaque, bool running, RunState state)
{
int i;
if (!running) {
return;
}
if (cb_reset_serial_on_resume) {
qemu_clipboard_reset_serial();
}
for (i = 0; i < QEMU_CLIPBOARD_SELECTION__COUNT; i++) {
if (cbinfo[i]) {
qemu_clipboard_update(cbinfo[i]);
}
}
}
void qemu_clipboard_peer_register(QemuClipboardPeer *peer)
{
if (cb_change_state_entry == NULL) {
cb_change_state_entry = qemu_add_vm_change_state_handler(qemu_clipboard_change_state, NULL);
}
notifier_list_add(&clipboard_notifiers, &peer->notifier);
}
void qemu_clipboard_peer_unregister(QemuClipboardPeer *peer)
{
int i;
for (i = 0; i < QEMU_CLIPBOARD_SELECTION__COUNT; i++) {
qemu_clipboard_peer_release(peer, i);
}
notifier_remove(&peer->notifier);
}
bool qemu_clipboard_peer_owns(QemuClipboardPeer *peer,
QemuClipboardSelection selection)
{
QemuClipboardInfo *info = qemu_clipboard_info(selection);
return info && info->owner == peer;
}
void qemu_clipboard_peer_release(QemuClipboardPeer *peer,
QemuClipboardSelection selection)
{
g_autoptr(QemuClipboardInfo) info = NULL;
if (qemu_clipboard_peer_owns(peer, selection)) {
/* set empty clipboard info */
info = qemu_clipboard_info_new(NULL, selection);
qemu_clipboard_update(info);
}
}
bool qemu_clipboard_check_serial(QemuClipboardInfo *info, bool client)
{
bool ok;
if (!info->has_serial ||
!cbinfo[info->selection] ||
!cbinfo[info->selection]->has_serial) {
trace_clipboard_check_serial(-1, -1, true);
return true;
}
if (client) {
ok = info->serial >= cbinfo[info->selection]->serial;
} else {
ok = info->serial > cbinfo[info->selection]->serial;
}
trace_clipboard_check_serial(cbinfo[info->selection]->serial, info->serial, ok);
return ok;
}
void qemu_clipboard_update(QemuClipboardInfo *info)
{
uint32_t type;
QemuClipboardNotify notify = {
.type = QEMU_CLIPBOARD_UPDATE_INFO,
.info = info,
};
assert(info->selection < QEMU_CLIPBOARD_SELECTION__COUNT);
for (type = 0; type < QEMU_CLIPBOARD_TYPE__COUNT; type++) {
/*
* If data is missing, the clipboard owner's 'request' callback needs to
* be set. Otherwise, there is no way to get the clipboard data and
* qemu_clipboard_request() cannot be called.
*/
if (info->types[type].available && !info->types[type].data) {
assert(info->owner && info->owner->request);
}
}
if (runstate_is_running() || runstate_check(RUN_STATE_SUSPENDED)) {
notifier_list_notify(&clipboard_notifiers, ¬ify);
}
if (cbinfo[info->selection] != info) {
qemu_clipboard_info_unref(cbinfo[info->selection]);
cbinfo[info->selection] = qemu_clipboard_info_ref(info);
}
}
QemuClipboardInfo *qemu_clipboard_info(QemuClipboardSelection selection)
{
assert(selection < QEMU_CLIPBOARD_SELECTION__COUNT);
return cbinfo[selection];
}
QemuClipboardInfo *qemu_clipboard_info_new(QemuClipboardPeer *owner,
QemuClipboardSelection selection)
{
QemuClipboardInfo *info = g_new0(QemuClipboardInfo, 1);
info->owner = owner;
info->selection = selection;
info->refcount = 1;
return info;
}
QemuClipboardInfo *qemu_clipboard_info_ref(QemuClipboardInfo *info)
{
info->refcount++;
return info;
}
void qemu_clipboard_info_unref(QemuClipboardInfo *info)
{
uint32_t type;
if (!info) {
return;
}
info->refcount--;
if (info->refcount > 0) {
return;
}
for (type = 0; type < QEMU_CLIPBOARD_TYPE__COUNT; type++) {
g_free(info->types[type].data);
}
g_free(info);
}
void qemu_clipboard_request(QemuClipboardInfo *info,
QemuClipboardType type)
{
if (info->types[type].data ||
info->types[type].requested ||
!info->types[type].available ||
!info->owner)
return;
assert(info->owner->request);
info->types[type].requested = true;
info->owner->request(info, type);
}
void qemu_clipboard_reset_serial(void)
{
QemuClipboardNotify notify = { .type = QEMU_CLIPBOARD_RESET_SERIAL };
int i;
trace_clipboard_reset_serial();
for (i = 0; i < QEMU_CLIPBOARD_SELECTION__COUNT; i++) {
QemuClipboardInfo *info = qemu_clipboard_info(i);
if (info) {
info->serial = 0;
}
}
if (runstate_is_running() || runstate_check(RUN_STATE_SUSPENDED)) {
notifier_list_notify(&clipboard_notifiers, ¬ify);
} else {
cb_reset_serial_on_resume = true;
}
}
void qemu_clipboard_set_data(QemuClipboardPeer *peer,
QemuClipboardInfo *info,
QemuClipboardType type,
uint32_t size,
const void *data,
bool update)
{
if (!info ||
info->owner != peer) {
return;
}
g_free(info->types[type].data);
if (size) {
info->types[type].data = g_memdup2(data, size);
info->types[type].size = size;
info->types[type].available = true;
} else {
info->types[type].data = NULL;
info->types[type].size = 0;
info->types[type].available = false;
}
if (update) {
qemu_clipboard_update(info);
}
}
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