| // 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)); |
| } |