fl_keyboard_handler.cc

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// Copyright 2013 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 "flutter/shell/platform/linux/fl_keyboard_handler.h"
 
#include "flutter/shell/platform/linux/fl_keyboard_channel.h"
 
struct _FlKeyboardHandler {
  GObject parent_instance;
 
  FlKeyboardManager* keyboard_manager;
 
  // The channel used by the framework to query the keyboard pressed state.
  FlKeyboardChannel* channel;
};
 
G_DEFINE_TYPE(FlKeyboardHandler, fl_keyboard_handler, G_TYPE_OBJECT);
 
// Returns the keyboard pressed state.
static FlValue* get_keyboard_state(gpointer user_data) {
  FlKeyboardHandler* self = FL_KEYBOARD_HANDLER(user_data);
 
  FlValue* result = fl_value_new_map();
 
  GHashTable* pressing_records =
      fl_keyboard_manager_get_pressed_state(self->keyboard_manager);
 
  g_hash_table_foreach(
      pressing_records,
      [](gpointer key, gpointer value, gpointer user_data) {
        int64_t physical_key = reinterpret_cast<int64_t>(key);
        int64_t logical_key = reinterpret_cast<int64_t>(value);
        FlValue* fl_value_map = reinterpret_cast<FlValue*>(user_data);
 
        fl_value_set_take(fl_value_map, fl_value_new_int(physical_key),
                          fl_value_new_int(logical_key));
      },
      result);
 
  return result;
}
 
static void fl_keyboard_handler_dispose(GObject* object) {
  FlKeyboardHandler* self = FL_KEYBOARD_HANDLER(object);
 
  g_clear_object(&self->keyboard_manager);
  g_clear_object(&self->channel);
 
  G_OBJECT_CLASS(fl_keyboard_handler_parent_class)->dispose(object);
}
 
static void fl_keyboard_handler_class_init(FlKeyboardHandlerClass* klass) {
  G_OBJECT_CLASS(klass)->dispose = fl_keyboard_handler_dispose;
}
 
static FlKeyboardChannelVTable keyboard_channel_vtable = {
    .get_keyboard_state = get_keyboard_state};
 
static void fl_keyboard_handler_init(FlKeyboardHandler* self) {}
 
FlKeyboardHandler* fl_keyboard_handler_new(
    FlBinaryMessenger* messenger,
    FlKeyboardManager* keyboard_manager) {
  FlKeyboardHandler* self = FL_KEYBOARD_HANDLER(
      g_object_new(fl_keyboard_handler_get_type(), nullptr));
 
  self->keyboard_manager = FL_KEYBOARD_MANAGER(g_object_ref(keyboard_manager));
 
  // Setup the flutter/keyboard channel.
  self->channel =
      fl_keyboard_channel_new(messenger, &keyboard_channel_vtable, self);
  return self;
}