fl_window_state_monitor.cc File Reference

#include "flutter/shell/platform/linux/fl_window_state_monitor.h"
#include <gtk/gtk.h>
#include "flutter/shell/platform/linux/public/flutter_linux/fl_string_codec.h"

Go to the source code of this file.

Classes
struct	_FlWindowStateMonitor

Functions
	G_DEFINE_TYPE (FlWindowStateMonitor, fl_window_state_monitor, G_TYPE_OBJECT)
static void	send_lifecycle_state (FlWindowStateMonitor *self, const gchar *lifecycle_state)
static gboolean	is_hidden (GdkWindowState state)
static gboolean	window_state_event_cb (FlWindowStateMonitor *self, GdkEvent *event)
static void	fl_window_state_monitor_dispose (GObject *object)
static void	fl_window_state_monitor_class_init (FlWindowStateMonitorClass *klass)
static void	fl_window_state_monitor_init (FlWindowStateMonitor *self)
FlWindowStateMonitor *	fl_window_state_monitor_new (FlBinaryMessenger *messenger, GtkWindow *window)

Variables
static constexpr const char *	kFlutterLifecycleChannel = "flutter/lifecycle"
static constexpr const char *	kAppLifecycleStateResumed
static constexpr const char *	kAppLifecycleStateInactive
static constexpr const char *	kAppLifecycleStateHidden

Function Documentation

fl_window_state_monitor_class_init()

static void fl_window_state_monitor_class_init ( FlWindowStateMonitorClass *  klass )

static

Definition at line 97 of file fl_window_state_monitor.cc.

                                      {
  G_OBJECT_CLASS(klass)->dispose = fl_window_state_monitor_dispose;
}

References fl_window_state_monitor_dispose().

fl_window_state_monitor_dispose()

static void fl_window_state_monitor_dispose ( GObject *  object )

static

Definition at line 85 of file fl_window_state_monitor.cc.

                                                             {
  FlWindowStateMonitor* self = FL_WINDOW_STATE_MONITOR(object);
 
  g_clear_object(&self->messenger);
  if (self->window_state_event_cb_id != 0) {
    g_signal_handler_disconnect(self->window, self->window_state_event_cb_id);
    self->window_state_event_cb_id = 0;
  }
 
  G_OBJECT_CLASS(fl_window_state_monitor_parent_class)->dispose(object);
}

Referenced by fl_window_state_monitor_class_init().

fl_window_state_monitor_init()

static void fl_window_state_monitor_init ( FlWindowStateMonitor *  self )

static

Definition at line 102 of file fl_window_state_monitor.cc.

{}

fl_window_state_monitor_new()

FlWindowStateMonitor* fl_window_state_monitor_new	(	FlBinaryMessenger *	messenger,
		GtkWindow *	window
	)

FlWindowStateMonitor:

Monitors a GtkWindow and reports state change events to the Flutter engine. fl_window_state_monitor_new: @messenger: an #FlBinaryMessenger. @window: a #GtkWindow.

Creates a new window state manager to monitor @window and report events to @messenger.

Returns: a new #FlWindowStateMonitor.

Definition at line 104 of file fl_window_state_monitor.cc.

                                                                     {
  FlWindowStateMonitor* self = FL_WINDOW_STATE_MONITOR(
      g_object_new(fl_window_state_monitor_get_type(), nullptr));
  self->messenger = FL_BINARY_MESSENGER(g_object_ref(messenger));
  self->window = window;
 
  // Listen to window state changes.
  self->window_state_event_cb_id =
      g_signal_connect_swapped(self->window, "window-state-event",
                               G_CALLBACK(window_state_event_cb), self);
  self->window_state =
      gdk_window_get_state(gtk_widget_get_window(GTK_WIDGET(self->window)));
 
  return self;
}

References window, and window_state_event_cb().

Referenced by realize_cb(), and TEST().

G_DEFINE_TYPE()

G_DEFINE_TYPE	(	FlWindowStateMonitor	,
		fl_window_state_monitor	,
		G_TYPE_OBJECT
	)

is_hidden()

static gboolean is_hidden ( GdkWindowState  state )

static

Definition at line 54 of file fl_window_state_monitor.cc.

                                                {
  return (state & GDK_WINDOW_STATE_WITHDRAWN) ||
         (state & GDK_WINDOW_STATE_ICONIFIED);
}

Referenced by window_state_event_cb().

send_lifecycle_state()

static void send_lifecycle_state ( FlWindowStateMonitor *  self, const gchar *  lifecycle_state  )

static

Definition at line 38 of file fl_window_state_monitor.cc.

                                                               {
  g_autoptr(FlValue) value = fl_value_new_string(lifecycle_state);
  g_autoptr(FlStringCodec) codec = fl_string_codec_new();
  g_autoptr(GError) error = nullptr;
  g_autoptr(GBytes) message =
      fl_message_codec_encode_message(FL_MESSAGE_CODEC(codec), value, &error);
  if (message == nullptr) {
    g_warning("Failed to encoding lifecycle state message: %s", error->message);
    return;
  }
 
  fl_binary_messenger_send_on_channel(self->messenger, kFlutterLifecycleChannel,
                                      message, nullptr, nullptr, nullptr);
}

References error, fl_binary_messenger_send_on_channel(), fl_message_codec_encode_message(), fl_string_codec_new(), fl_value_new_string(), kFlutterLifecycleChannel, and value.

Referenced by window_state_event_cb().

window_state_event_cb()

static gboolean window_state_event_cb ( FlWindowStateMonitor *  self, GdkEvent *  event  )

static

Definition at line 60 of file fl_window_state_monitor.cc.

                                                       {
  GdkWindowState state = event->window_state.new_window_state;
  GdkWindowState previous_state = self->window_state;
  self->window_state = state;
  bool was_visible = !is_hidden(previous_state);
  bool is_visible = !is_hidden(state);
  bool was_focused = (previous_state & GDK_WINDOW_STATE_FOCUSED);
  bool is_focused = (state & GDK_WINDOW_STATE_FOCUSED);
 
  if (was_visible != is_visible || was_focused != is_focused) {
    const gchar* lifecycle_state;
    if (is_visible) {
      lifecycle_state =
          is_focused ? kAppLifecycleStateResumed : kAppLifecycleStateInactive;
    } else {
      lifecycle_state = kAppLifecycleStateHidden;
    }
 
    send_lifecycle_state(self, lifecycle_state);
  }
 
  return FALSE;
}

References is_hidden(), kAppLifecycleStateHidden, kAppLifecycleStateInactive, kAppLifecycleStateResumed, and send_lifecycle_state().

Referenced by fl_window_state_monitor_new().

Variable Documentation

kAppLifecycleStateHidden

constexpr const char* kAppLifecycleStateHidden

staticconstexpr

Initial value:

=
    "AppLifecycleState.hidden"

Definition at line 17 of file fl_window_state_monitor.cc.

Referenced by window_state_event_cb().

kAppLifecycleStateInactive

constexpr const char* kAppLifecycleStateInactive

staticconstexpr

Initial value:

=
    "AppLifecycleState.inactive"

Definition at line 15 of file fl_window_state_monitor.cc.

Referenced by window_state_event_cb().

kAppLifecycleStateResumed

constexpr const char* kAppLifecycleStateResumed

staticconstexpr

Initial value:

=
    "AppLifecycleState.resumed"

Definition at line 13 of file fl_window_state_monitor.cc.

Referenced by window_state_event_cb().

kFlutterLifecycleChannel

constexpr const char* kFlutterLifecycleChannel = "flutter/lifecycle"

staticconstexpr

Definition at line 11 of file fl_window_state_monitor.cc.

Referenced by send_lifecycle_state().