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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <atomic>
#include <list>
#include <mutex>
#include <utility>
#include "input_common/keyboard.h"
namespace InputCommon {
class KeyButton final : public Input::ButtonDevice {
public:
explicit KeyButton(std::shared_ptr<KeyButtonList> key_button_list_, bool toggle_)
: key_button_list(std::move(key_button_list_)), toggle(toggle_) {}
~KeyButton() override;
bool GetStatus() const override {
if (toggle) {
return toggled_status.load(std::memory_order_relaxed);
}
return status.load();
}
void ToggleButton() {
if (lock) {
return;
}
lock = true;
const bool old_toggle_status = toggled_status.load();
toggled_status.store(!old_toggle_status);
}
void UnlockButton() {
lock = false;
}
friend class KeyButtonList;
private:
std::shared_ptr<KeyButtonList> key_button_list;
std::atomic<bool> status{false};
std::atomic<bool> toggled_status{false};
bool lock{false};
const bool toggle;
};
struct KeyButtonPair {
int key_code;
KeyButton* key_button;
};
class KeyButtonList {
public:
void AddKeyButton(int key_code, KeyButton* key_button) {
std::lock_guard guard{mutex};
list.push_back(KeyButtonPair{key_code, key_button});
}
void RemoveKeyButton(const KeyButton* key_button) {
std::lock_guard guard{mutex};
list.remove_if(
[key_button](const KeyButtonPair& pair) { return pair.key_button == key_button; });
}
void ChangeKeyStatus(int key_code, bool pressed) {
std::lock_guard guard{mutex};
for (const KeyButtonPair& pair : list) {
if (pair.key_code == key_code) {
pair.key_button->status.store(pressed);
if (pressed) {
pair.key_button->ToggleButton();
} else {
pair.key_button->UnlockButton();
}
pair.key_button->TriggerOnChange();
}
}
}
void ChangeAllKeyStatus(bool pressed) {
std::lock_guard guard{mutex};
for (const KeyButtonPair& pair : list) {
pair.key_button->status.store(pressed);
}
}
private:
std::mutex mutex;
std::list<KeyButtonPair> list;
};
Keyboard::Keyboard() : key_button_list{std::make_shared<KeyButtonList>()} {}
KeyButton::~KeyButton() {
key_button_list->RemoveKeyButton(this);
}
std::unique_ptr<Input::ButtonDevice> Keyboard::Create(const Common::ParamPackage& params) {
const int key_code = params.Get("code", 0);
const bool toggle = params.Get("toggle", false);
std::unique_ptr<KeyButton> button = std::make_unique<KeyButton>(key_button_list, toggle);
key_button_list->AddKeyButton(key_code, button.get());
return button;
}
void Keyboard::PressKey(int key_code) {
key_button_list->ChangeKeyStatus(key_code, true);
}
void Keyboard::ReleaseKey(int key_code) {
key_button_list->ChangeKeyStatus(key_code, false);
}
void Keyboard::ReleaseAllKeys() {
key_button_list->ChangeAllKeyStatus(false);
}
} // namespace InputCommon
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