key_mapping.h

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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.
 
#ifndef FLUTTER_SHELL_PLATFORM_LINUX_KEY_MAPPING_H_
#define FLUTTER_SHELL_PLATFORM_LINUX_KEY_MAPPING_H_
 
#include <gdk/gdk.h>
#include <cinttypes>
#include <map>
#include <vector>
 
inline uint64_t gpointer_to_uint64(gpointer pointer) {
  return pointer == nullptr ? 0 : reinterpret_cast<uint64_t>(pointer);
}
 
inline gpointer uint64_to_gpointer(uint64_t number) {
  return reinterpret_cast<gpointer>(number);
}
 
// Maps XKB specific key code values to Flutter's physical key code values.
extern std::map<uint64_t, uint64_t> xkb_to_physical_key_map;
 
// Maps GDK keyval values to Flutter's logical key code values.
extern std::map<uint64_t, uint64_t> gtk_keyval_to_logical_key_map;
 
void initialize_modifier_bit_to_checked_keys(GHashTable* table);
 
void initialize_lock_bit_to_checked_keys(GHashTable* table);
 
// Mask for the 32-bit value portion of the key code.
extern const uint64_t kValueMask;
 
// The plane value for keys which have a Unicode representation.
extern const uint64_t kUnicodePlane;
 
// The plane value for the private keys defined by the GTK embedding.
extern const uint64_t kGtkPlane;
 
typedef struct {
  // The key code for a key that prints `keyChar` in the US keyboard layout.
  uint16_t keycode;
 
  // The logical key for this key.
  uint64_t logical_key;
 
  // If the goal is mandatory, the keyboard handler will make sure to find a
  // logical key for this character, falling back to the US keyboard layout.
  bool mandatory;
} LayoutGoal;
 
// NOLINTNEXTLINE(readability-identifier-naming)
extern const std::vector<LayoutGoal> layout_goals;
 
#endif  // FLUTTER_SHELL_PLATFORM_LINUX_KEY_MAPPING_H_