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feat(engine/linux): add GTK4 lifecycle state monitoring

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This commit is contained in:
Rich Young 2026-02-05 19:44:10 -05:00
parent 03480d5d4a
commit dedbfcf725
1 changed files with 99 additions and 5 deletions
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104
engine/src/flutter/shell/platform/linux/fl_window_state_monitor.cc
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@ -8,7 +8,6 @@
#include "flutter/shell/platform/linux/public/flutter_linux/fl_string_codec.h"
#if !FLUTTER_LINUX_GTK4
static constexpr const char* kFlutterLifecycleChannel = "flutter/lifecycle";
static constexpr const char* kAppLifecycleStateResumed =
@ -17,7 +16,6 @@ static constexpr const char* kAppLifecycleStateInactive =
"AppLifecycleState.inactive";
static constexpr const char* kAppLifecycleStateHidden =
"AppLifecycleState.hidden";
#endif
struct _FlWindowStateMonitor {
GObject parent_instance;
@ -35,11 +33,16 @@ struct _FlWindowStateMonitor {
// Signal connection ID for window-state-changed
gulong window_state_event_cb_id;
#if FLUTTER_LINUX_GTK4
gulong toplevel_state_notify_cb_id;
gulong surface_mapped_notify_cb_id;
gulong realize_cb_id;
#endif
};
G_DEFINE_TYPE(FlWindowStateMonitor, fl_window_state_monitor, G_TYPE_OBJECT);
#if !FLUTTER_LINUX_GTK4
static void send_lifecycle_state(FlWindowStateMonitor* self,
const gchar* lifecycle_state) {
g_autoptr(FlValue) value = fl_value_new_string(lifecycle_state);
@ -55,7 +58,6 @@ static void send_lifecycle_state(FlWindowStateMonitor* self,
fl_binary_messenger_send_on_channel(self->messenger, kFlutterLifecycleChannel,
message, nullptr, nullptr, nullptr);
}
#endif
#if !FLUTTER_LINUX_GTK4
static gboolean is_hidden(GdkWindowState state) {
@ -63,6 +65,11 @@ static gboolean is_hidden(GdkWindowState state) {
(state & GDK_WINDOW_STATE_ICONIFIED);
}
#endif // !FLUTTER_LINUX_GTK4
#if FLUTTER_LINUX_GTK4
static gboolean is_hidden(GdkToplevelState state, gboolean mapped) {
return !mapped || (state & GDK_TOPLEVEL_STATE_MINIMIZED);
}
#endif
#if !FLUTTER_LINUX_GTK4
// Signal handler for GtkWindow::window-state-event
static gboolean window_state_event_cb(FlWindowStateMonitor* self,
@ -91,6 +98,67 @@ static gboolean window_state_event_cb(FlWindowStateMonitor* self,
}
#endif // !FLUTTER_LINUX_GTK4
#if FLUTTER_LINUX_GTK4
static void update_lifecycle_state_gtk4(FlWindowStateMonitor* self) {
GtkNative* native = gtk_widget_get_native(GTK_WIDGET(self->window));
if (native == nullptr) {
return;
}
GdkSurface* surface = gtk_native_get_surface(native);
if (surface == nullptr || !GDK_IS_TOPLEVEL(surface)) {
return;
}
GdkToplevelState state = gdk_toplevel_get_state(GDK_TOPLEVEL(surface));
gboolean mapped = gdk_surface_get_mapped(surface);
bool visible = !is_hidden(state, mapped);
bool focused = (state & GDK_TOPLEVEL_STATE_FOCUSED);
const gchar* lifecycle_state;
if (visible) {
lifecycle_state =
focused ? kAppLifecycleStateResumed : kAppLifecycleStateInactive;
} else {
lifecycle_state = kAppLifecycleStateHidden;
}
send_lifecycle_state(self, lifecycle_state);
}
static void gtk4_surface_notify_cb(FlWindowStateMonitor* self) {
update_lifecycle_state_gtk4(self);
}
static void gtk4_setup_surface(FlWindowStateMonitor* self) {
if (self->toplevel_state_notify_cb_id != 0 ||
self->surface_mapped_notify_cb_id != 0) {
return;
}
GtkNative* native = gtk_widget_get_native(GTK_WIDGET(self->window));
if (native == nullptr) {
return;
}
GdkSurface* surface = gtk_native_get_surface(native);
if (surface == nullptr || !GDK_IS_TOPLEVEL(surface)) {
return;
}
self->toplevel_state_notify_cb_id = g_signal_connect_swapped(
surface, "notify::state", G_CALLBACK(gtk4_surface_notify_cb), self);
self->surface_mapped_notify_cb_id = g_signal_connect_swapped(
surface, "notify::mapped", G_CALLBACK(gtk4_surface_notify_cb), self);
update_lifecycle_state_gtk4(self);
}
static void gtk4_realize_cb(FlWindowStateMonitor* self) {
gtk4_setup_surface(self);
}
#endif // FLUTTER_LINUX_GTK4
static void fl_window_state_monitor_dispose(GObject* object) {
FlWindowStateMonitor* self = FL_WINDOW_STATE_MONITOR(object);
@ -99,6 +167,28 @@ static void fl_window_state_monitor_dispose(GObject* object) {
g_signal_handler_disconnect(self->window, self->window_state_event_cb_id);
self->window_state_event_cb_id = 0;
}
#if FLUTTER_LINUX_GTK4
GtkNative* native = gtk_widget_get_native(GTK_WIDGET(self->window));
if (native != nullptr) {
GdkSurface* surface = gtk_native_get_surface(native);
if (surface != nullptr) {
if (self->toplevel_state_notify_cb_id != 0) {
g_signal_handler_disconnect(surface,
self->toplevel_state_notify_cb_id);
self->toplevel_state_notify_cb_id = 0;
}
if (self->surface_mapped_notify_cb_id != 0) {
g_signal_handler_disconnect(surface,
self->surface_mapped_notify_cb_id);
self->surface_mapped_notify_cb_id = 0;
}
}
}
if (self->realize_cb_id != 0) {
g_signal_handler_disconnect(self->window, self->realize_cb_id);
self->realize_cb_id = 0;
}
#endif
G_OBJECT_CLASS(fl_window_state_monitor_parent_class)->dispose(object);
}
@ -126,7 +216,11 @@ FlWindowStateMonitor* fl_window_state_monitor_new(FlBinaryMessenger* messenger,
gdk_window_get_state(gtk_widget_get_window(GTK_WIDGET(self->window)));
#else
self->window_state_event_cb_id = 0;
// TODO(gtk4): Reconnect lifecycle updates using GdkToplevel state.
self->toplevel_state_notify_cb_id = 0;
self->surface_mapped_notify_cb_id = 0;
self->realize_cb_id = g_signal_connect_swapped(
self->window, "realize", G_CALLBACK(gtk4_realize_cb), self);
gtk4_setup_surface(self);
#endif
return self;