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dolphin/Source/Core/Common/Keyboard.cpp
Sepalani 49a7dce956 IOS/KBD: Move keyboard logic to Common/Keyboard 
The keypress loop was simplified and its keyboard state buffer removed.

KeyboardContext helper class added.
2026-02-05 12:26:38 +04:00

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// Copyright 2026 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "Common/Keyboard.h"
#include <array>
#include <mutex>
#include <utility>
#ifdef _WIN32
#include <windows.h>
#endif
#include "Common/FileUtil.h"
#include "Common/IniFile.h"
#include "Core/Config/MainSettings.h"
namespace
{
// Crazy ugly
#ifdef _WIN32
constexpr std::size_t KEYBOARD_STATE_SIZE = 256;
constexpr std::array<u8, KEYBOARD_STATE_SIZE> VK_HID_QWERTY{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x2A, // Backspace
0x2B, // Tab
0x00, 0x00,
0x00, // Clear
0x28, // Return
0x00, 0x00,
0x00, // Shift
0x00, // Control
0x00, // ALT
0x48, // Pause
0x39, // Capital
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x29, // Escape
0x00, 0x00, 0x00, 0x00,
0x2C, // Space
0x4B, // Prior
0x4E, // Next
0x4D, // End
0x4A, // Home
0x50, // Left
0x52, // Up
0x4F, // Right
0x51, // Down
0x00, 0x00, 0x00,
0x46, // Print screen
0x49, // Insert
0x4C, // Delete
0x00,
// 0 -> 9
0x27, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00,
// A -> Z
0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13,
0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x00, 0x00, 0x00, 0x00, 0x00,
// Numpad 0 -> 9
0x62, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 0x60, 0x61,
0x55, // Multiply
0x57, // Add
0x00, // Separator
0x56, // Subtract
0x63, // Decimal
0x54, // Divide
// F1 -> F12
0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,
// F13 -> F24
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x53, // Numlock
0x47, // Scroll lock
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// Modifier keys
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x33, // ';'
0x2E, // Plus
0x36, // Comma
0x2D, // Minus
0x37, // Period
0x38, // '/'
0x35, // '~'
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x2F, // '['
0x32, // '\'
0x30, // ']'
0x34, // '''
0x00, //
0x00, // Nothing interesting past this point.
};
constexpr std::array<u8, KEYBOARD_STATE_SIZE> VK_HID_AZERTY{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x2A, // Backspace
0x2B, // Tab
0x00, 0x00,
0x00, // Clear
0x28, // Return
0x00, 0x00,
0x00, // Shift
0x00, // Control
0x00, // ALT
0x48, // Pause
0x39, // Capital
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x29, // Escape
0x00, 0x00, 0x00, 0x00,
0x2C, // Space
0x4B, // Prior
0x4E, // Next
0x4D, // End
0x4A, // Home
0x50, // Left
0x52, // Up
0x4F, // Right
0x51, // Down
0x00, 0x00, 0x00,
0x46, // Print screen
0x49, // Insert
0x4C, // Delete
0x00,
// 0 -> 9
0x27, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00,
// A -> Z
0x14, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x33, 0x11, 0x12, 0x13,
0x04, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1D, 0x1B, 0x1C, 0x1A, 0x00, 0x00, 0x00, 0x00, 0x00,
// Numpad 0 -> 9
0x62, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 0x60, 0x61,
0x55, // Multiply
0x57, // Add
0x00, // Separator
0x56, // Subtract
0x63, // Decimal
0x54, // Divide
// F1 -> F12
0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,
// F13 -> F24
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x53, // Numlock
0x47, // Scroll lock
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// Modifier keys
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x30, // '$'
0x2E, // Plus
0x10, // Comma
0x00, // Minus
0x36, // Period
0x37, // '/'
0x34, // ' '
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x2D, // ')'
0x32, // '\'
0x2F, // '^'
0x00, // ' '
0x38, // '!'
0x00, // Nothing interesting past this point.
};
u8 MapVirtualKeyToHID(u8 virtual_key, int keyboard_layout)
{
switch (keyboard_layout)
{
case Common::KBD_LAYOUT_AZERTY:
return VK_HID_AZERTY[virtual_key];
case Common::KBD_LAYOUT_QWERTY:
default:
return VK_HID_QWERTY[virtual_key];
}
}
#else
u8 MapVirtualKeyToHID(u8 virtual_key, int keyboard_layout)
{
return virtual_key;
}
#endif
std::weak_ptr<Common::KeyboardContext> s_keyboard_context;
std::mutex s_keyboard_context_mutex;
} // Anonymous namespace
namespace Common
{
KeyboardContext::KeyboardContext()
{
if (Config::Get(Config::MAIN_WII_KEYBOARD))
Init();
}
KeyboardContext::~KeyboardContext()
{
if (Config::Get(Config::MAIN_WII_KEYBOARD))
Quit();
}
void KeyboardContext::Init()
{
UpdateLayout();
m_is_ready = true;
}
void KeyboardContext::Quit()
{
m_is_ready = false;
}
std::shared_ptr<KeyboardContext> KeyboardContext::GetInstance()
{
const std::lock_guard guard(s_keyboard_context_mutex);
std::shared_ptr<KeyboardContext> ptr = s_keyboard_context.lock();
if (!ptr)
{
ptr = std::shared_ptr<KeyboardContext>(new KeyboardContext);
s_keyboard_context = ptr;
}
return ptr;
}
HIDPressedState KeyboardContext::GetPressedState() const
{
return m_is_ready ? HIDPressedState{.modifiers = PollHIDModifiers(),
.pressed_keys = PollHIDPressedKeys()} :
HIDPressedState{};
}
bool KeyboardContext::IsVirtualKeyPressed(int virtual_key) const
{
#ifdef _WIN32
return (GetAsyncKeyState(virtual_key) & 0x8000) != 0;
#else
// TODO: do it for non-Windows platforms
return false;
#endif
}
u8 KeyboardContext::PollHIDModifiers() const
{
u8 modifiers = 0;
#ifdef _WIN32
using VkHidPair = std::pair<int, u8>;
// References:
// https://learn.microsoft.com/windows/win32/inputdev/virtual-key-codes
// https://www.usb.org/document-library/device-class-definition-hid-111
static const std::vector<VkHidPair> MODIFIERS_MAP{
{VK_LCONTROL, 0x01}, // HID modifier: Bit 0 - LEFT CTRL
{VK_LSHIFT, 0x02}, // HID modifier: Bit 1 - LEFT SHIFT
{VK_LMENU, 0x04}, // HID modifier: Bit 2 - LEFT ALT
{VK_LWIN, 0x08}, // HID modifier: Bit 3 - LEFT GUI
{VK_RCONTROL, 0x10}, // HID modifier: Bit 4 - RIGHT CTRL
{VK_RSHIFT, 0x20}, // HID modifier: Bit 5 - RIGHT SHIFT
{VK_RMENU, 0x40}, // HID modifier: Bit 6 - RIGHT ALT
{VK_RWIN, 0x80} // HID modifier: Bit 7 - RIGHT GUI
};
for (const auto& [virtual_key, hid_modifier] : MODIFIERS_MAP)
{
if (IsVirtualKeyPressed(virtual_key))
modifiers |= hid_modifier;
}
#else
// TODO: Implementation for non-Windows platforms
#endif
return modifiers;
}
HIDPressedKeys KeyboardContext::PollHIDPressedKeys() const
{
HIDPressedKeys pressed_keys{};
auto it = pressed_keys.begin();
#ifdef _WIN32
for (std::size_t virtual_key = 0; virtual_key < KEYBOARD_STATE_SIZE; ++virtual_key)
{
if (!IsVirtualKeyPressed(static_cast<int>(virtual_key)))
continue;
*it = MapVirtualKeyToHID(static_cast<u8>(virtual_key), m_keyboard_layout);
if (++it == pressed_keys.end())
break;
}
#else
// TODO: Implementation for non-Windows platforms
#endif
return pressed_keys;
}
void KeyboardContext::UpdateLayout()
{
Common::IniFile ini;
ini.Load(File::GetUserPath(F_DOLPHINCONFIG_IDX));
ini.GetOrCreateSection("USB Keyboard")->Get("Layout", &m_keyboard_layout, KBD_LAYOUT_QWERTY);
}
} // namespace Common
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