121 lines
4 KiB
C++
121 lines
4 KiB
C++
// Copyright (c) 2025 Microsoft, GmbH.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "shell/browser/ui/file_dialog.h"
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#include <optional>
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#include "base/command_line.h"
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#include "base/functional/bind.h"
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#include "base/logging.h"
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#include "base/memory/scoped_refptr.h"
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#include "base/no_destructor.h"
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#include "base/strings/string_number_conversions.h"
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#include "base/synchronization/atomic_flag.h"
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#include "components/dbus/thread_linux/dbus_thread_linux.h"
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#include "components/dbus/utils/check_for_service_and_start.h"
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#include "dbus/bus.h"
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#include "dbus/object_path.h"
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#include "dbus/object_proxy.h"
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#include "dbus/property.h"
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namespace file_dialog {
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namespace {
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constexpr char kXdgPortalService[] = "org.freedesktop.portal.Desktop";
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constexpr char kXdgPortalObject[] = "/org/freedesktop/portal/desktop";
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constexpr char kFileChooserInterfaceName[] =
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"org.freedesktop.portal.FileChooser";
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// Version 4 includes support for current_folder option to the OpenFile method
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// via https://github.com/flatpak/xdg-desktop-portal/commit/71165a5.
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uint32_t g_required_portal_version = 3;
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uint32_t g_available_portal_version = 0;
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constexpr char kXdgPortalRequiredVersionFlag[] = "xdg-portal-required-version";
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bool g_portal_available = false;
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struct FileChooserProperties : dbus::PropertySet {
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dbus::Property<uint32_t> version;
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explicit FileChooserProperties(dbus::ObjectProxy* object_proxy)
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: dbus::PropertySet(object_proxy, kFileChooserInterfaceName, {}) {
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RegisterProperty("version", &version);
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}
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~FileChooserProperties() override = default;
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};
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base::AtomicFlag* GetAvailabilityTestCompletionFlag() {
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static base::NoDestructor<base::AtomicFlag> flag;
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return flag.get();
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}
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void CheckPortalAvailabilityOnBusThread() {
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auto* flag = GetAvailabilityTestCompletionFlag();
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if (flag->IsSet())
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return;
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dbus::Bus::Options options;
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options.bus_type = dbus::Bus::SESSION;
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options.connection_type = dbus::Bus::PRIVATE;
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options.dbus_task_runner = dbus_thread_linux::GetTaskRunner();
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scoped_refptr<dbus::Bus> bus = base::MakeRefCounted<dbus::Bus>(options);
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dbus_utils::CheckForServiceAndStart(
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bus, kXdgPortalService,
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base::BindOnce(
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[](scoped_refptr<dbus::Bus> bus, base::AtomicFlag* flag,
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std::optional<bool> name_has_owner) {
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if (name_has_owner.value_or(false)) {
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//
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dbus::ObjectPath portal_path(kXdgPortalObject);
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dbus::ObjectProxy* portal =
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bus->GetObjectProxy(kXdgPortalService, portal_path);
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FileChooserProperties properties(portal);
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if (!properties.GetAndBlock(&properties.version)) {
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LOG(ERROR) << "Failed to read portal version property";
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} else if (properties.version.value() >=
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g_required_portal_version) {
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g_portal_available = true;
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g_available_portal_version = properties.version.value();
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}
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}
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VLOG(1) << "File chooser portal available: "
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<< (g_portal_available ? "yes" : "no");
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flag->Set();
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bus->ShutdownAndBlock();
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},
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std::move(bus), flag));
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}
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} // namespace
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void StartPortalAvailabilityTestInBackground() {
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if (GetAvailabilityTestCompletionFlag()->IsSet())
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return;
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const auto* cmd = base::CommandLine::ForCurrentProcess();
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if (!base::StringToUint(
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cmd->GetSwitchValueASCII(kXdgPortalRequiredVersionFlag),
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&g_required_portal_version)) {
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VLOG(1) << "Unable to parse --xdg-portal-required-version";
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}
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dbus_thread_linux::GetTaskRunner()->PostTask(
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FROM_HERE, base::BindOnce(&CheckPortalAvailabilityOnBusThread));
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}
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bool IsPortalAvailable() {
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if (!GetAvailabilityTestCompletionFlag()->IsSet())
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LOG(WARNING) << "Portal availability checked before test was complete";
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return g_portal_available;
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}
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uint32_t GetPortalVersion() {
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return g_available_portal_version;
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}
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} // namespace file_dialog
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