| /* |
| * QEMU DBus display |
| * |
| * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| #include "qemu/osdep.h" |
| #include "qemu/dbus.h" |
| #include "qemu/error-report.h" |
| #include "qemu/main-loop.h" |
| #include "qom/object_interfaces.h" |
| #include "sysemu/sysemu.h" |
| #include "qapi/error.h" |
| #include "trace.h" |
| |
| #include "dbus.h" |
| |
| #define MIME_TEXT_PLAIN_UTF8 "text/plain;charset=utf-8" |
| |
| static void |
| dbus_clipboard_complete_request( |
| DBusDisplay *dpy, |
| GDBusMethodInvocation *invocation, |
| QemuClipboardInfo *info, |
| QemuClipboardType type) |
| { |
| GVariant *v_data = g_variant_new_from_data( |
| G_VARIANT_TYPE("ay"), |
| info->types[type].data, |
| info->types[type].size, |
| TRUE, |
| (GDestroyNotify)qemu_clipboard_info_unref, |
| qemu_clipboard_info_ref(info)); |
| |
| qemu_dbus_display1_clipboard_complete_request( |
| dpy->clipboard, invocation, |
| MIME_TEXT_PLAIN_UTF8, v_data); |
| } |
| |
| static void |
| dbus_clipboard_update_info(DBusDisplay *dpy, QemuClipboardInfo *info) |
| { |
| bool self_update = info->owner == &dpy->clipboard_peer; |
| const char *mime[QEMU_CLIPBOARD_TYPE__COUNT + 1] = { 0, }; |
| DBusClipboardRequest *req; |
| int i = 0; |
| |
| if (info->owner == NULL) { |
| if (dpy->clipboard_proxy) { |
| qemu_dbus_display1_clipboard_call_release( |
| dpy->clipboard_proxy, |
| info->selection, |
| G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL); |
| } |
| return; |
| } |
| |
| if (self_update || !info->has_serial) { |
| return; |
| } |
| |
| req = &dpy->clipboard_request[info->selection]; |
| if (req->invocation && info->types[req->type].data) { |
| dbus_clipboard_complete_request(dpy, req->invocation, info, req->type); |
| g_clear_object(&req->invocation); |
| g_source_remove(req->timeout_id); |
| req->timeout_id = 0; |
| return; |
| } |
| |
| if (info->types[QEMU_CLIPBOARD_TYPE_TEXT].available) { |
| mime[i++] = MIME_TEXT_PLAIN_UTF8; |
| } |
| |
| if (i > 0) { |
| if (dpy->clipboard_proxy) { |
| qemu_dbus_display1_clipboard_call_grab( |
| dpy->clipboard_proxy, |
| info->selection, |
| info->serial, |
| mime, |
| G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL); |
| } |
| } |
| } |
| |
| static void |
| dbus_clipboard_reset_serial(DBusDisplay *dpy) |
| { |
| if (dpy->clipboard_proxy) { |
| qemu_dbus_display1_clipboard_call_register( |
| dpy->clipboard_proxy, |
| G_DBUS_CALL_FLAGS_NONE, |
| -1, NULL, NULL, NULL); |
| } |
| } |
| |
| static void |
| dbus_clipboard_notify(Notifier *notifier, void *data) |
| { |
| DBusDisplay *dpy = |
| container_of(notifier, DBusDisplay, clipboard_peer.notifier); |
| QemuClipboardNotify *notify = data; |
| |
| switch (notify->type) { |
| case QEMU_CLIPBOARD_UPDATE_INFO: |
| dbus_clipboard_update_info(dpy, notify->info); |
| return; |
| case QEMU_CLIPBOARD_RESET_SERIAL: |
| dbus_clipboard_reset_serial(dpy); |
| return; |
| } |
| } |
| |
| static void |
| dbus_clipboard_qemu_request(QemuClipboardInfo *info, |
| QemuClipboardType type) |
| { |
| DBusDisplay *dpy = container_of(info->owner, DBusDisplay, clipboard_peer); |
| g_autofree char *mime = NULL; |
| g_autoptr(GVariant) v_data = NULL; |
| g_autoptr(GError) err = NULL; |
| const char *data = NULL; |
| const char *mimes[] = { MIME_TEXT_PLAIN_UTF8, NULL }; |
| size_t n; |
| |
| trace_dbus_clipboard_qemu_request(type); |
| |
| if (type != QEMU_CLIPBOARD_TYPE_TEXT) { |
| /* unsupported atm */ |
| return; |
| } |
| |
| if (dpy->clipboard_proxy) { |
| if (!qemu_dbus_display1_clipboard_call_request_sync( |
| dpy->clipboard_proxy, |
| info->selection, |
| mimes, |
| G_DBUS_CALL_FLAGS_NONE, -1, &mime, &v_data, NULL, &err)) { |
| error_report("Failed to request clipboard: %s", err->message); |
| return; |
| } |
| |
| if (g_strcmp0(mime, MIME_TEXT_PLAIN_UTF8)) { |
| error_report("Unsupported returned MIME: %s", mime); |
| return; |
| } |
| |
| data = g_variant_get_fixed_array(v_data, &n, 1); |
| qemu_clipboard_set_data(&dpy->clipboard_peer, info, type, |
| n, data, true); |
| } |
| } |
| |
| static void |
| dbus_clipboard_request_cancelled(DBusClipboardRequest *req) |
| { |
| if (!req->invocation) { |
| return; |
| } |
| |
| g_dbus_method_invocation_return_error( |
| req->invocation, |
| DBUS_DISPLAY_ERROR, |
| DBUS_DISPLAY_ERROR_FAILED, |
| "Cancelled clipboard request"); |
| |
| g_clear_object(&req->invocation); |
| g_source_remove(req->timeout_id); |
| req->timeout_id = 0; |
| } |
| |
| static void |
| dbus_clipboard_unregister_proxy(DBusDisplay *dpy) |
| { |
| const char *name = NULL; |
| int i; |
| |
| for (i = 0; i < G_N_ELEMENTS(dpy->clipboard_request); ++i) { |
| dbus_clipboard_request_cancelled(&dpy->clipboard_request[i]); |
| } |
| |
| if (!dpy->clipboard_proxy) { |
| return; |
| } |
| |
| name = g_dbus_proxy_get_name(G_DBUS_PROXY(dpy->clipboard_proxy)); |
| trace_dbus_clipboard_unregister(name); |
| g_clear_object(&dpy->clipboard_proxy); |
| } |
| |
| static gboolean |
| dbus_clipboard_register( |
| DBusDisplay *dpy, |
| GDBusMethodInvocation *invocation) |
| { |
| g_autoptr(GError) err = NULL; |
| const char *name = NULL; |
| GDBusConnection *connection = g_dbus_method_invocation_get_connection(invocation); |
| |
| if (dpy->clipboard_proxy) { |
| g_dbus_method_invocation_return_error( |
| invocation, |
| DBUS_DISPLAY_ERROR, |
| DBUS_DISPLAY_ERROR_FAILED, |
| "Clipboard peer already registered!"); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| dpy->clipboard_proxy = |
| qemu_dbus_display1_clipboard_proxy_new_sync( |
| connection, |
| G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START, |
| g_dbus_method_invocation_get_sender(invocation), |
| "/org/qemu/Display1/Clipboard", |
| NULL, |
| &err); |
| if (!dpy->clipboard_proxy) { |
| g_dbus_method_invocation_return_error( |
| invocation, |
| DBUS_DISPLAY_ERROR, |
| DBUS_DISPLAY_ERROR_FAILED, |
| "Failed to setup proxy: %s", err->message); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| name = g_dbus_proxy_get_name(G_DBUS_PROXY(dpy->clipboard_proxy)); |
| trace_dbus_clipboard_register(name); |
| |
| g_object_connect(dpy->clipboard_proxy, |
| "swapped-signal::notify::g-name-owner", |
| dbus_clipboard_unregister_proxy, dpy, |
| NULL); |
| g_object_connect(connection, |
| "swapped-signal::closed", |
| dbus_clipboard_unregister_proxy, dpy, |
| NULL); |
| qemu_clipboard_reset_serial(); |
| |
| qemu_dbus_display1_clipboard_complete_register(dpy->clipboard, invocation); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| static gboolean |
| dbus_clipboard_check_caller(DBusDisplay *dpy, GDBusMethodInvocation *invocation) |
| { |
| if (!dpy->clipboard_proxy || |
| g_strcmp0(g_dbus_proxy_get_name(G_DBUS_PROXY(dpy->clipboard_proxy)), |
| g_dbus_method_invocation_get_sender(invocation))) { |
| g_dbus_method_invocation_return_error( |
| invocation, |
| DBUS_DISPLAY_ERROR, |
| DBUS_DISPLAY_ERROR_FAILED, |
| "Unregistered caller"); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| dbus_clipboard_unregister( |
| DBusDisplay *dpy, |
| GDBusMethodInvocation *invocation) |
| { |
| if (!dbus_clipboard_check_caller(dpy, invocation)) { |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| dbus_clipboard_unregister_proxy(dpy); |
| |
| qemu_dbus_display1_clipboard_complete_unregister( |
| dpy->clipboard, invocation); |
| |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| static gboolean |
| dbus_clipboard_grab( |
| DBusDisplay *dpy, |
| GDBusMethodInvocation *invocation, |
| gint arg_selection, |
| guint arg_serial, |
| const gchar *const *arg_mimes) |
| { |
| QemuClipboardSelection s = arg_selection; |
| g_autoptr(QemuClipboardInfo) info = NULL; |
| |
| if (!dbus_clipboard_check_caller(dpy, invocation)) { |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| trace_dbus_clipboard_grab(arg_selection, arg_serial); |
| |
| if (s >= QEMU_CLIPBOARD_SELECTION__COUNT) { |
| g_dbus_method_invocation_return_error( |
| invocation, |
| DBUS_DISPLAY_ERROR, |
| DBUS_DISPLAY_ERROR_FAILED, |
| "Invalid clipboard selection: %d", arg_selection); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| info = qemu_clipboard_info_new(&dpy->clipboard_peer, s); |
| if (g_strv_contains(arg_mimes, MIME_TEXT_PLAIN_UTF8)) { |
| info->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true; |
| } |
| info->serial = arg_serial; |
| info->has_serial = true; |
| if (qemu_clipboard_check_serial(info, true)) { |
| qemu_clipboard_update(info); |
| } else { |
| trace_dbus_clipboard_grab_failed(); |
| } |
| |
| qemu_dbus_display1_clipboard_complete_grab(dpy->clipboard, invocation); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| static gboolean |
| dbus_clipboard_release( |
| DBusDisplay *dpy, |
| GDBusMethodInvocation *invocation, |
| gint arg_selection) |
| { |
| if (!dbus_clipboard_check_caller(dpy, invocation)) { |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| qemu_clipboard_peer_release(&dpy->clipboard_peer, arg_selection); |
| |
| qemu_dbus_display1_clipboard_complete_release(dpy->clipboard, invocation); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| static gboolean |
| dbus_clipboard_request_timeout(gpointer user_data) |
| { |
| dbus_clipboard_request_cancelled(user_data); |
| return G_SOURCE_REMOVE; |
| } |
| |
| static gboolean |
| dbus_clipboard_request( |
| DBusDisplay *dpy, |
| GDBusMethodInvocation *invocation, |
| gint arg_selection, |
| const gchar *const *arg_mimes) |
| { |
| QemuClipboardSelection s = arg_selection; |
| QemuClipboardType type = QEMU_CLIPBOARD_TYPE_TEXT; |
| QemuClipboardInfo *info = NULL; |
| |
| if (!dbus_clipboard_check_caller(dpy, invocation)) { |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| if (s >= QEMU_CLIPBOARD_SELECTION__COUNT) { |
| g_dbus_method_invocation_return_error( |
| invocation, |
| DBUS_DISPLAY_ERROR, |
| DBUS_DISPLAY_ERROR_FAILED, |
| "Invalid clipboard selection: %d", arg_selection); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| if (dpy->clipboard_request[s].invocation) { |
| g_dbus_method_invocation_return_error( |
| invocation, |
| DBUS_DISPLAY_ERROR, |
| DBUS_DISPLAY_ERROR_FAILED, |
| "Pending request"); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| info = qemu_clipboard_info(s); |
| if (!info || !info->owner || info->owner == &dpy->clipboard_peer) { |
| g_dbus_method_invocation_return_error( |
| invocation, |
| DBUS_DISPLAY_ERROR, |
| DBUS_DISPLAY_ERROR_FAILED, |
| "Empty clipboard"); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| if (!g_strv_contains(arg_mimes, MIME_TEXT_PLAIN_UTF8) || |
| !info->types[type].available) { |
| g_dbus_method_invocation_return_error( |
| invocation, |
| DBUS_DISPLAY_ERROR, |
| DBUS_DISPLAY_ERROR_FAILED, |
| "Unhandled MIME types requested"); |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| if (info->types[type].data) { |
| dbus_clipboard_complete_request(dpy, invocation, info, type); |
| } else { |
| qemu_clipboard_request(info, type); |
| |
| dpy->clipboard_request[s].invocation = g_object_ref(invocation); |
| dpy->clipboard_request[s].type = type; |
| dpy->clipboard_request[s].timeout_id = |
| g_timeout_add_seconds(5, dbus_clipboard_request_timeout, |
| &dpy->clipboard_request[s]); |
| } |
| |
| return DBUS_METHOD_INVOCATION_HANDLED; |
| } |
| |
| void |
| dbus_clipboard_init(DBusDisplay *dpy) |
| { |
| g_autoptr(GDBusObjectSkeleton) clipboard = NULL; |
| |
| assert(!dpy->clipboard); |
| |
| clipboard = g_dbus_object_skeleton_new(DBUS_DISPLAY1_ROOT "/Clipboard"); |
| dpy->clipboard = qemu_dbus_display1_clipboard_skeleton_new(); |
| g_object_connect(dpy->clipboard, |
| "swapped-signal::handle-register", |
| dbus_clipboard_register, dpy, |
| "swapped-signal::handle-unregister", |
| dbus_clipboard_unregister, dpy, |
| "swapped-signal::handle-grab", |
| dbus_clipboard_grab, dpy, |
| "swapped-signal::handle-release", |
| dbus_clipboard_release, dpy, |
| "swapped-signal::handle-request", |
| dbus_clipboard_request, dpy, |
| NULL); |
| |
| g_dbus_object_skeleton_add_interface( |
| G_DBUS_OBJECT_SKELETON(clipboard), |
| G_DBUS_INTERFACE_SKELETON(dpy->clipboard)); |
| g_dbus_object_manager_server_export(dpy->server, clipboard); |
| dpy->clipboard_peer.name = "dbus"; |
| dpy->clipboard_peer.notifier.notify = dbus_clipboard_notify; |
| dpy->clipboard_peer.request = dbus_clipboard_qemu_request; |
| qemu_clipboard_peer_register(&dpy->clipboard_peer); |
| } |
