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