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/*
* GTK UI -- clipboard support
*
* Copyright (C) 2021 Gerd Hoffmann <kraxel@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/main-loop.h"
#include "ui/gtk.h"
static QemuClipboardSelection gd_find_selection(GtkDisplayState *gd,
GtkClipboard *clipboard)
{
QemuClipboardSelection s;
for (s = 0; s < QEMU_CLIPBOARD_SELECTION__COUNT; s++) {
if (gd->gtkcb[s] == clipboard) {
return s;
}
}
return QEMU_CLIPBOARD_SELECTION_CLIPBOARD;
}
static void gd_clipboard_get_data(GtkClipboard *clipboard,
GtkSelectionData *selection_data,
guint selection_info,
gpointer data)
{
GtkDisplayState *gd = data;
QemuClipboardSelection s = gd_find_selection(gd, clipboard);
QemuClipboardType type = QEMU_CLIPBOARD_TYPE_TEXT;
g_autoptr(QemuClipboardInfo) info = NULL;
info = qemu_clipboard_info_ref(qemu_clipboard_info(s));
qemu_clipboard_request(info, type);
while (info == qemu_clipboard_info(s) &&
info->types[type].available &&
info->types[type].data == NULL) {
main_loop_wait(false);
}
if (info == qemu_clipboard_info(s) && gd->cbowner[s]) {
gtk_selection_data_set_text(selection_data,
info->types[type].data,
info->types[type].size);
} else {
/* clipboard owner changed while waiting for the data */
}
}
static void gd_clipboard_clear(GtkClipboard *clipboard,
gpointer data)
{
GtkDisplayState *gd = data;
QemuClipboardSelection s = gd_find_selection(gd, clipboard);
gd->cbowner[s] = false;
}
static void gd_clipboard_notify(Notifier *notifier, void *data)
{
GtkDisplayState *gd = container_of(notifier, GtkDisplayState, cbpeer.update);
QemuClipboardInfo *info = data;
QemuClipboardSelection s = info->selection;
bool self_update = info->owner == &gd->cbpeer;
if (info != qemu_clipboard_info(s)) {
gd->cbpending[s] = 0;
if (!self_update) {
GtkTargetList *list;
GtkTargetEntry *targets;
gint n_targets;
list = gtk_target_list_new(NULL, 0);
if (info->types[QEMU_CLIPBOARD_TYPE_TEXT].available) {
gtk_target_list_add_text_targets(list, 0);
}
targets = gtk_target_table_new_from_list(list, &n_targets);
gtk_clipboard_clear(gd->gtkcb[s]);
gd->cbowner[s] = true;
gtk_clipboard_set_with_data(gd->gtkcb[s],
targets, n_targets,
gd_clipboard_get_data,
gd_clipboard_clear,
gd);
gtk_target_table_free(targets, n_targets);
gtk_target_list_unref(list);
}
return;
}
if (self_update) {
return;
}
/*
* Clipboard got updated, with data probably. No action here, we
* are waiting for updates in gd_clipboard_get_data().
*/
}
static void gd_clipboard_request(QemuClipboardInfo *info,
QemuClipboardType type)
{
GtkDisplayState *gd = container_of(info->owner, GtkDisplayState, cbpeer);
char *text;
switch (type) {
case QEMU_CLIPBOARD_TYPE_TEXT:
text = gtk_clipboard_wait_for_text(gd->gtkcb[info->selection]);
if (text) {
qemu_clipboard_set_data(&gd->cbpeer, info, type,
strlen(text), text, true);
g_free(text);
}
break;
default:
break;
}
}
static void gd_owner_change(GtkClipboard *clipboard,
GdkEvent *event,
gpointer data)
{
GtkDisplayState *gd = data;
QemuClipboardSelection s = gd_find_selection(gd, clipboard);
QemuClipboardInfo *info;
if (gd->cbowner[s]) {
/* ignore notifications about our own grabs */
return;
}
switch (event->owner_change.reason) {
case GDK_OWNER_CHANGE_NEW_OWNER:
info = qemu_clipboard_info_new(&gd->cbpeer, s);
if (gtk_clipboard_wait_is_text_available(clipboard)) {
info->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true;
}
qemu_clipboard_update(info);
qemu_clipboard_info_unref(info);
break;
default:
qemu_clipboard_peer_release(&gd->cbpeer, s);
gd->cbowner[s] = false;
break;
}
}
void gd_clipboard_init(GtkDisplayState *gd)
{
gd->cbpeer.name = "gtk";
gd->cbpeer.update.notify = gd_clipboard_notify;
gd->cbpeer.request = gd_clipboard_request;
qemu_clipboard_peer_register(&gd->cbpeer);
gd->gtkcb[QEMU_CLIPBOARD_SELECTION_CLIPBOARD] =
gtk_clipboard_get(GDK_SELECTION_CLIPBOARD);
gd->gtkcb[QEMU_CLIPBOARD_SELECTION_PRIMARY] =
gtk_clipboard_get(GDK_SELECTION_PRIMARY);
gd->gtkcb[QEMU_CLIPBOARD_SELECTION_SECONDARY] =
gtk_clipboard_get(GDK_SELECTION_SECONDARY);
g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_CLIPBOARD],
"owner-change", G_CALLBACK(gd_owner_change), gd);
g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_PRIMARY],
"owner-change", G_CALLBACK(gd_owner_change), gd);
g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_SECONDARY],
"owner-change", G_CALLBACK(gd_owner_change), gd);
}
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