blob: da99a0b54ae7ef67a2e16ca0ef30a61329d5dec9 [file] [log] [blame]
// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "my_application.h"
#include <flutter_linux/flutter_linux.h>
#include <math.h>
#include <upower.h>
#ifdef GDK_WINDOWING_X11
#include <gdk/gdkx.h>
#endif
#include "flutter/generated_plugin_registrant.h"
struct _MyApplication {
GtkApplication parent_instance;
char** dart_entrypoint_arguments;
FlView* view;
// Connection to UPower.
UpClient* up_client;
GPtrArray* battery_devices;
// Channel for Dart code to request the battery information.
FlMethodChannel* battery_channel;
// Channel to send updates to Dart code about battery charging state.
FlEventChannel* charging_channel;
gchar* last_charge_event;
bool emit_charge_events;
};
G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
// Checks the charging state and emits an event if necessary.
static void update_charging_state(MyApplication* self) {
if (!self->emit_charge_events) {
return;
}
const gchar* charge_event = "discharging";
for (guint i = 0; i < self->battery_devices->len; i++) {
UpDevice* device =
static_cast<UpDevice*>(g_ptr_array_index(self->battery_devices, i));
guint state;
g_object_get(device, "state", &state, nullptr);
if (state == UP_DEVICE_STATE_CHARGING ||
state == UP_DEVICE_STATE_FULLY_CHARGED) {
charge_event = "charging";
}
}
if (g_strcmp0(charge_event, self->last_charge_event) != 0) {
g_autoptr(GError) error = nullptr;
g_autoptr(FlValue) value = fl_value_new_string(charge_event);
if (!fl_event_channel_send(self->charging_channel, value, nullptr,
&error)) {
g_warning("Failed to send charging event: %s", error->message);
return;
}
g_free(self->last_charge_event);
self->last_charge_event = g_strdup(charge_event);
}
}
// Called when a UPower device changes state.
static void up_device_state_changed_cb(MyApplication* self, GParamSpec* pspec,
UpDevice* device) {
update_charging_state(self);
}
// Called when UPower devices are added.
static void up_device_added_cb(MyApplication* self, UpDevice* device) {
// Listen for state changes from battery_devices.
guint kind;
g_object_get(device, "kind", &kind, nullptr);
if (kind == UP_DEVICE_KIND_BATTERY) {
g_ptr_array_add(self->battery_devices, g_object_ref(device));
g_signal_connect_swapped(device, "notify::state",
G_CALLBACK(up_device_state_changed_cb), self);
up_device_state_changed_cb(self, nullptr, device);
}
}
// Called when UPower devices are removed.
static void up_device_removed_cb(MyApplication* self, UpDevice* device) {
g_ptr_array_remove(self->battery_devices, device);
g_signal_handlers_disconnect_matched(
device, G_SIGNAL_MATCH_FUNC, 0, 0, nullptr,
reinterpret_cast<GClosure*>(up_device_state_changed_cb), nullptr);
}
// Gets the current battery level.
static FlMethodResponse* get_battery_level(MyApplication* self) {
// Find the first available battery and use that.
for (guint i = 0; i < self->battery_devices->len; i++) {
UpDevice* device =
static_cast<UpDevice*>(g_ptr_array_index(self->battery_devices, i));
double percentage;
g_object_get(device, "percentage", &percentage, nullptr);
g_autoptr(FlValue) result =
fl_value_new_int(static_cast<int64_t>(round(percentage)));
return FL_METHOD_RESPONSE(fl_method_success_response_new(result));
}
return FL_METHOD_RESPONSE(fl_method_error_response_new(
"NO_BATTERY", "Device does not have a battery.", nullptr));
}
// Called when the Dart code requests battery information.
static void battery_method_call_cb(FlMethodChannel* channel,
FlMethodCall* method_call,
gpointer user_data) {
MyApplication* self = static_cast<MyApplication*>(user_data);
g_autoptr(FlMethodResponse) response = nullptr;
if (strcmp(fl_method_call_get_name(method_call), "getBatteryLevel") == 0) {
response = get_battery_level(self);
} else {
response = FL_METHOD_RESPONSE(fl_method_not_implemented_response_new());
}
g_autoptr(GError) error = nullptr;
if (!fl_method_call_respond(method_call, response, &error)) {
g_warning("Failed to send response: %s", error->message);
}
}
// Called when the Dart code starts listening for charging events.
static FlMethodErrorResponse* charging_listen_cb(FlEventChannel* channel,
FlValue* args,
gpointer user_data) {
MyApplication* self = static_cast<MyApplication*>(user_data);
self->emit_charge_events = true;
update_charging_state(self);
return nullptr;
}
// Called when the Dart code stops listening for charging events.
static FlMethodErrorResponse* charging_cancel_cb(FlEventChannel* channel,
FlValue* args,
gpointer user_data) {
MyApplication* self = static_cast<MyApplication*>(user_data);
self->emit_charge_events = false;
return nullptr;
}
// Creates the platform channels this application provides.
static void create_channels(MyApplication* self) {
FlEngine* engine = fl_view_get_engine(self->view);
FlBinaryMessenger* messenger = fl_engine_get_binary_messenger(engine);
g_autoptr(FlStandardMethodCodec) codec = fl_standard_method_codec_new();
self->battery_channel = fl_method_channel_new(
messenger, "samples.flutter.io/battery", FL_METHOD_CODEC(codec));
fl_method_channel_set_method_call_handler(
self->battery_channel, battery_method_call_cb, self, nullptr);
self->charging_channel = fl_event_channel_new(
messenger, "samples.flutter.io/charging", FL_METHOD_CODEC(codec));
fl_event_channel_set_stream_handlers(self->charging_channel,
charging_listen_cb, charging_cancel_cb,
self, nullptr);
}
// Implements GApplication::activate.
static void my_application_activate(GApplication* application) {
MyApplication* self = MY_APPLICATION(application);
GtkWindow* window =
GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
// Use a header bar when running in GNOME as this is the common style used
// by applications and is the setup most users will be using (e.g. Ubuntu
// desktop).
// If running on X and not using GNOME then just use a traditional title bar
// in case the window manager does more exotic layout, e.g. tiling.
// If running on Wayland assume the header bar will work (may need changing
// if future cases occur).
gboolean use_header_bar = TRUE;
#ifdef GDK_WINDOWING_X11
GdkScreen* screen = gtk_window_get_screen(window);
if (GDK_IS_X11_SCREEN(screen)) {
const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
use_header_bar = FALSE;
}
}
#endif
if (use_header_bar) {
GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
gtk_widget_show(GTK_WIDGET(header_bar));
gtk_header_bar_set_title(header_bar, "platform_channel");
gtk_header_bar_set_show_close_button(header_bar, TRUE);
gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
} else {
gtk_window_set_title(window, "platform_channel");
}
gtk_window_set_default_size(window, 1280, 720);
gtk_widget_show(GTK_WIDGET(window));
g_autoptr(FlDartProject) project = fl_dart_project_new();
fl_dart_project_set_dart_entrypoint_arguments(
project, self->dart_entrypoint_arguments);
// Connect to UPower.
self->up_client = up_client_new();
g_signal_connect_swapped(self->up_client, "device-added",
G_CALLBACK(up_device_added_cb), self);
g_signal_connect_swapped(self->up_client, "device-removed",
G_CALLBACK(up_device_removed_cb), self);
g_autoptr(GPtrArray) devices = up_client_get_devices(self->up_client);
for (guint i = 0; i < devices->len; i++) {
g_autoptr(UpDevice) device =
static_cast<UpDevice*>(g_ptr_array_index(devices, i));
up_device_added_cb(self, device);
}
self->view = fl_view_new(project);
gtk_widget_show(GTK_WIDGET(self->view));
gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(self->view));
fl_register_plugins(FL_PLUGIN_REGISTRY(self->view));
// Create application specific platform channels.
create_channels(self);
gtk_widget_grab_focus(GTK_WIDGET(self->view));
}
// Implements GApplication::local_command_line.
static gboolean my_application_local_command_line(GApplication* application,
gchar*** arguments,
int* exit_status) {
MyApplication* self = MY_APPLICATION(application);
// Strip out the first argument as it is the binary name.
self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);
g_autoptr(GError) error = nullptr;
if (!g_application_register(application, nullptr, &error)) {
g_warning("Failed to register: %s", error->message);
*exit_status = 1;
return TRUE;
}
g_application_activate(application);
*exit_status = 0;
return TRUE;
}
// Implements GObject::dispose.
static void my_application_dispose(GObject* object) {
MyApplication* self = MY_APPLICATION(object);
for (guint i = 0; i < self->battery_devices->len; i++) {
UpDevice* device =
static_cast<UpDevice*>(g_ptr_array_index(self->battery_devices, i));
g_signal_handlers_disconnect_matched(device, G_SIGNAL_MATCH_DATA, 0, 0,
nullptr, nullptr, self);
}
g_signal_handlers_disconnect_matched(self->up_client, G_SIGNAL_MATCH_DATA, 0,
0, nullptr, nullptr, self);
g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
g_clear_object(&self->up_client);
g_clear_object(&self->battery_devices);
g_clear_object(&self->battery_channel);
g_clear_object(&self->charging_channel);
g_clear_pointer(&self->last_charge_event, g_free);
G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
}
static void my_application_class_init(MyApplicationClass* klass) {
G_APPLICATION_CLASS(klass)->activate = my_application_activate;
G_APPLICATION_CLASS(klass)->local_command_line =
my_application_local_command_line;
G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
}
static void my_application_init(MyApplication* self) {
self->battery_devices = g_ptr_array_new_with_free_func(g_object_unref);
}
MyApplication* my_application_new() {
return MY_APPLICATION(g_object_new(my_application_get_type(),
"application-id", APPLICATION_ID, "flags",
G_APPLICATION_NON_UNIQUE, nullptr));
}