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https://gitlab.com/qemu-project/qemu.git
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2e35439f25
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20240717171541.201525-2-marcandre.lureau@redhat.com>
459 lines
14 KiB
C
459 lines
14 KiB
C
/*
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* QEMU DBus display
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*
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* Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu/dbus.h"
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#include "qemu/error-report.h"
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#include "qemu/main-loop.h"
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#include "qom/object_interfaces.h"
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#include "sysemu/sysemu.h"
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#include "qapi/error.h"
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#include "trace.h"
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#include "dbus.h"
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#define MIME_TEXT_PLAIN_UTF8 "text/plain;charset=utf-8"
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static void
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dbus_clipboard_complete_request(
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DBusDisplay *dpy,
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GDBusMethodInvocation *invocation,
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QemuClipboardInfo *info,
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QemuClipboardType type)
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{
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GVariant *v_data = g_variant_new_from_data(
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G_VARIANT_TYPE("ay"),
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info->types[type].data,
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info->types[type].size,
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TRUE,
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(GDestroyNotify)qemu_clipboard_info_unref,
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qemu_clipboard_info_ref(info));
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qemu_dbus_display1_clipboard_complete_request(
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dpy->clipboard, invocation,
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MIME_TEXT_PLAIN_UTF8, v_data);
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}
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static void
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dbus_clipboard_update_info(DBusDisplay *dpy, QemuClipboardInfo *info)
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{
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bool self_update = info->owner == &dpy->clipboard_peer;
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const char *mime[QEMU_CLIPBOARD_TYPE__COUNT + 1] = { 0, };
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DBusClipboardRequest *req;
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int i = 0;
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if (info->owner == NULL) {
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if (dpy->clipboard_proxy) {
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qemu_dbus_display1_clipboard_call_release(
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dpy->clipboard_proxy,
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info->selection,
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G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
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}
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return;
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}
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if (self_update || !info->has_serial) {
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return;
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}
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req = &dpy->clipboard_request[info->selection];
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if (req->invocation && info->types[req->type].data) {
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dbus_clipboard_complete_request(dpy, req->invocation, info, req->type);
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g_clear_object(&req->invocation);
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g_source_remove(req->timeout_id);
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req->timeout_id = 0;
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return;
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}
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if (info->types[QEMU_CLIPBOARD_TYPE_TEXT].available) {
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mime[i++] = MIME_TEXT_PLAIN_UTF8;
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}
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if (i > 0) {
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if (dpy->clipboard_proxy) {
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qemu_dbus_display1_clipboard_call_grab(
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dpy->clipboard_proxy,
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info->selection,
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info->serial,
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mime,
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G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
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}
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}
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}
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static void
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dbus_clipboard_reset_serial(DBusDisplay *dpy)
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{
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if (dpy->clipboard_proxy) {
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qemu_dbus_display1_clipboard_call_register(
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dpy->clipboard_proxy,
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G_DBUS_CALL_FLAGS_NONE,
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-1, NULL, NULL, NULL);
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}
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}
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static void
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dbus_clipboard_notify(Notifier *notifier, void *data)
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{
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DBusDisplay *dpy =
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container_of(notifier, DBusDisplay, clipboard_peer.notifier);
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QemuClipboardNotify *notify = data;
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switch (notify->type) {
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case QEMU_CLIPBOARD_UPDATE_INFO:
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dbus_clipboard_update_info(dpy, notify->info);
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return;
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case QEMU_CLIPBOARD_RESET_SERIAL:
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dbus_clipboard_reset_serial(dpy);
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return;
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}
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}
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static void
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dbus_clipboard_qemu_request(QemuClipboardInfo *info,
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QemuClipboardType type)
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{
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DBusDisplay *dpy = container_of(info->owner, DBusDisplay, clipboard_peer);
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g_autofree char *mime = NULL;
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g_autoptr(GVariant) v_data = NULL;
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g_autoptr(GError) err = NULL;
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const char *data = NULL;
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const char *mimes[] = { MIME_TEXT_PLAIN_UTF8, NULL };
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size_t n;
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trace_dbus_clipboard_qemu_request(type);
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if (type != QEMU_CLIPBOARD_TYPE_TEXT) {
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/* unsupported atm */
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return;
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}
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if (dpy->clipboard_proxy) {
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if (!qemu_dbus_display1_clipboard_call_request_sync(
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dpy->clipboard_proxy,
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info->selection,
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mimes,
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G_DBUS_CALL_FLAGS_NONE, -1, &mime, &v_data, NULL, &err)) {
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error_report("Failed to request clipboard: %s", err->message);
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return;
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}
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if (g_strcmp0(mime, MIME_TEXT_PLAIN_UTF8)) {
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error_report("Unsupported returned MIME: %s", mime);
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return;
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}
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data = g_variant_get_fixed_array(v_data, &n, 1);
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qemu_clipboard_set_data(&dpy->clipboard_peer, info, type,
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n, data, true);
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}
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}
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static void
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dbus_clipboard_request_cancelled(DBusClipboardRequest *req)
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{
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if (!req->invocation) {
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return;
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}
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g_dbus_method_invocation_return_error(
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req->invocation,
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DBUS_DISPLAY_ERROR,
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DBUS_DISPLAY_ERROR_FAILED,
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"Cancelled clipboard request");
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g_clear_object(&req->invocation);
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g_source_remove(req->timeout_id);
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req->timeout_id = 0;
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}
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static void
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dbus_clipboard_unregister_proxy(DBusDisplay *dpy)
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{
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const char *name = NULL;
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int i;
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for (i = 0; i < G_N_ELEMENTS(dpy->clipboard_request); ++i) {
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dbus_clipboard_request_cancelled(&dpy->clipboard_request[i]);
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}
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if (!dpy->clipboard_proxy) {
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return;
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}
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name = g_dbus_proxy_get_name(G_DBUS_PROXY(dpy->clipboard_proxy));
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trace_dbus_clipboard_unregister(name);
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g_clear_object(&dpy->clipboard_proxy);
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}
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static gboolean
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dbus_clipboard_register(
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DBusDisplay *dpy,
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GDBusMethodInvocation *invocation)
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{
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g_autoptr(GError) err = NULL;
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const char *name = NULL;
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GDBusConnection *connection = g_dbus_method_invocation_get_connection(invocation);
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if (dpy->clipboard_proxy) {
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g_dbus_method_invocation_return_error(
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invocation,
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DBUS_DISPLAY_ERROR,
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DBUS_DISPLAY_ERROR_FAILED,
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"Clipboard peer already registered!");
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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dpy->clipboard_proxy =
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qemu_dbus_display1_clipboard_proxy_new_sync(
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connection,
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G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
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g_dbus_method_invocation_get_sender(invocation),
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"/org/qemu/Display1/Clipboard",
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NULL,
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&err);
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if (!dpy->clipboard_proxy) {
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g_dbus_method_invocation_return_error(
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invocation,
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DBUS_DISPLAY_ERROR,
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DBUS_DISPLAY_ERROR_FAILED,
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"Failed to setup proxy: %s", err->message);
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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name = g_dbus_proxy_get_name(G_DBUS_PROXY(dpy->clipboard_proxy));
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trace_dbus_clipboard_register(name);
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g_object_connect(dpy->clipboard_proxy,
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"swapped-signal::notify::g-name-owner",
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dbus_clipboard_unregister_proxy, dpy,
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NULL);
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g_object_connect(connection,
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"swapped-signal::closed",
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dbus_clipboard_unregister_proxy, dpy,
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NULL);
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qemu_clipboard_reset_serial();
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qemu_dbus_display1_clipboard_complete_register(dpy->clipboard, invocation);
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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static gboolean
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dbus_clipboard_check_caller(DBusDisplay *dpy, GDBusMethodInvocation *invocation)
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{
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if (!dpy->clipboard_proxy ||
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g_strcmp0(g_dbus_proxy_get_name(G_DBUS_PROXY(dpy->clipboard_proxy)),
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g_dbus_method_invocation_get_sender(invocation))) {
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g_dbus_method_invocation_return_error(
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invocation,
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DBUS_DISPLAY_ERROR,
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DBUS_DISPLAY_ERROR_FAILED,
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"Unregistered caller");
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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dbus_clipboard_unregister(
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DBusDisplay *dpy,
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GDBusMethodInvocation *invocation)
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{
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if (!dbus_clipboard_check_caller(dpy, invocation)) {
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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dbus_clipboard_unregister_proxy(dpy);
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qemu_dbus_display1_clipboard_complete_unregister(
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dpy->clipboard, invocation);
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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static gboolean
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dbus_clipboard_grab(
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DBusDisplay *dpy,
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GDBusMethodInvocation *invocation,
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gint arg_selection,
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guint arg_serial,
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const gchar *const *arg_mimes)
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{
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QemuClipboardSelection s = arg_selection;
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g_autoptr(QemuClipboardInfo) info = NULL;
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if (!dbus_clipboard_check_caller(dpy, invocation)) {
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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trace_dbus_clipboard_grab(arg_selection, arg_serial);
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if (s >= QEMU_CLIPBOARD_SELECTION__COUNT) {
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g_dbus_method_invocation_return_error(
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invocation,
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DBUS_DISPLAY_ERROR,
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DBUS_DISPLAY_ERROR_FAILED,
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"Invalid clipboard selection: %d", arg_selection);
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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info = qemu_clipboard_info_new(&dpy->clipboard_peer, s);
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if (g_strv_contains(arg_mimes, MIME_TEXT_PLAIN_UTF8)) {
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info->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true;
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}
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info->serial = arg_serial;
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info->has_serial = true;
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if (qemu_clipboard_check_serial(info, true)) {
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qemu_clipboard_update(info);
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} else {
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trace_dbus_clipboard_grab_failed();
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}
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qemu_dbus_display1_clipboard_complete_grab(dpy->clipboard, invocation);
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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static gboolean
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dbus_clipboard_release(
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DBusDisplay *dpy,
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GDBusMethodInvocation *invocation,
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gint arg_selection)
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{
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if (!dbus_clipboard_check_caller(dpy, invocation)) {
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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qemu_clipboard_peer_release(&dpy->clipboard_peer, arg_selection);
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qemu_dbus_display1_clipboard_complete_release(dpy->clipboard, invocation);
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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static gboolean
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dbus_clipboard_request_timeout(gpointer user_data)
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{
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dbus_clipboard_request_cancelled(user_data);
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return G_SOURCE_REMOVE;
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}
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static gboolean
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dbus_clipboard_request(
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DBusDisplay *dpy,
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GDBusMethodInvocation *invocation,
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gint arg_selection,
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const gchar *const *arg_mimes)
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{
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QemuClipboardSelection s = arg_selection;
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QemuClipboardType type = QEMU_CLIPBOARD_TYPE_TEXT;
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QemuClipboardInfo *info = NULL;
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if (!dbus_clipboard_check_caller(dpy, invocation)) {
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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if (s >= QEMU_CLIPBOARD_SELECTION__COUNT) {
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g_dbus_method_invocation_return_error(
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invocation,
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DBUS_DISPLAY_ERROR,
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DBUS_DISPLAY_ERROR_FAILED,
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"Invalid clipboard selection: %d", arg_selection);
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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if (dpy->clipboard_request[s].invocation) {
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g_dbus_method_invocation_return_error(
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invocation,
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DBUS_DISPLAY_ERROR,
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DBUS_DISPLAY_ERROR_FAILED,
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"Pending request");
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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info = qemu_clipboard_info(s);
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if (!info || !info->owner || info->owner == &dpy->clipboard_peer) {
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g_dbus_method_invocation_return_error(
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invocation,
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DBUS_DISPLAY_ERROR,
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DBUS_DISPLAY_ERROR_FAILED,
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"Empty clipboard");
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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if (!g_strv_contains(arg_mimes, MIME_TEXT_PLAIN_UTF8) ||
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!info->types[type].available) {
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g_dbus_method_invocation_return_error(
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invocation,
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DBUS_DISPLAY_ERROR,
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DBUS_DISPLAY_ERROR_FAILED,
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"Unhandled MIME types requested");
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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if (info->types[type].data) {
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dbus_clipboard_complete_request(dpy, invocation, info, type);
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} else {
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qemu_clipboard_request(info, type);
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dpy->clipboard_request[s].invocation = g_object_ref(invocation);
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dpy->clipboard_request[s].type = type;
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dpy->clipboard_request[s].timeout_id =
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g_timeout_add_seconds(5, dbus_clipboard_request_timeout,
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&dpy->clipboard_request[s]);
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}
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return DBUS_METHOD_INVOCATION_HANDLED;
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}
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void
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dbus_clipboard_init(DBusDisplay *dpy)
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{
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g_autoptr(GDBusObjectSkeleton) clipboard = NULL;
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assert(!dpy->clipboard);
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clipboard = g_dbus_object_skeleton_new(DBUS_DISPLAY1_ROOT "/Clipboard");
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dpy->clipboard = qemu_dbus_display1_clipboard_skeleton_new();
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g_object_connect(dpy->clipboard,
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"swapped-signal::handle-register",
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dbus_clipboard_register, dpy,
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"swapped-signal::handle-unregister",
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dbus_clipboard_unregister, dpy,
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"swapped-signal::handle-grab",
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dbus_clipboard_grab, dpy,
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"swapped-signal::handle-release",
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dbus_clipboard_release, dpy,
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"swapped-signal::handle-request",
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dbus_clipboard_request, dpy,
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NULL);
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g_dbus_object_skeleton_add_interface(
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G_DBUS_OBJECT_SKELETON(clipboard),
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G_DBUS_INTERFACE_SKELETON(dpy->clipboard));
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g_dbus_object_manager_server_export(dpy->server, clipboard);
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dpy->clipboard_peer.name = "dbus";
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dpy->clipboard_peer.notifier.notify = dbus_clipboard_notify;
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dpy->clipboard_peer.request = dbus_clipboard_qemu_request;
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qemu_clipboard_peer_register(&dpy->clipboard_peer);
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}
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