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CLK/Machines/Apple/ADB/Keyboard.cpp

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//
// Keyboard.cpp
// Clock Signal
//
// Created by Thomas Harte on 13/02/2021.
// Copyright © 2021 Thomas Harte. All rights reserved.
//
#include "Keyboard.hpp"
using namespace Apple::ADB;
Keyboard::Keyboard(Bus &bus) : ReactiveDevice(bus, 2) {}
void Keyboard::perform_command(const Command &command) {
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switch(command.type) {
case Command::Type::Reset:
modifiers_ = 0xffff;
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[[fallthrough]];
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case Command::Type::Flush: {
std::lock_guard lock_guard(keys_mutex_);
pending_events_.clear();
} break;
case Command::Type::Talk:
switch(command.reg) {
case 0: {
// Post up to two key events, or nothing if there are
// no events pending.
std::lock_guard lock_guard(keys_mutex_);
if(!pending_events_.empty()) {
if(pending_events_.size() > 1) {
post_response({pending_events_[0], pending_events_[1]});
pending_events_.erase(pending_events_.begin(), pending_events_.begin()+2);
} else {
// Two bytes are required; provide a key up of the fictional
// key zero as the second.
// That's arbitrary; verify with real machines.
post_response({pending_events_[0], 0x80});
pending_events_.clear();
}
}
} break;
case 2: {
std::lock_guard lock_guard(keys_mutex_);
post_response({uint8_t(modifiers_ >> 8), uint8_t(modifiers_)});
} break;
default: break;
}
break;
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case Command::Type::Listen:
// If a listen is incoming for register 2, prepare to capture LED statuses.
if(command.reg == 2) {
receive_bytes(2);
}
break;
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default: break;
}
}
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void Keyboard::did_receive_data(const Command &, const std::vector<uint8_t> &data) {
// This must be a register 2 listen; update the LED statuses.
// TODO: and possibly display these.
modifiers_ = (modifiers_ & 0xfff8) | (data[1] & 7);
}
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bool Keyboard::set_key_pressed(Key key, bool is_pressed) {
std::lock_guard lock_guard(keys_mutex_);
if(pressed_keys_[size_t(key)] == is_pressed) {
return true;
}
// ADB keyboard events: low 7 bits are a key code;
// bit 7 is either 0 for pressed or 1 for released.
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pending_events_.push_back(uint8_t(key) | (is_pressed ? 0x00 : 0x80));
pressed_keys_[size_t(key)] = is_pressed;
// Track modifier state also.
/*
In all cases below: 0 = pressed/on; 1 = released/off.
b15: None (reserved)
b14: Delete
b13: Caps lock
b12: Reset
b11: Control
b10: Shift
b9: Option
b8: Command
-- From here onwards, available only on the extended keyboard.
b7: Num lock/clear
b6: Scroll lock
b53: None (reserved)
b2: Scroll Lock LED
b1: Caps Lock LED
b0: Num Lock LED
*/
#define SetModifierBit(x) modifiers_ = (modifiers_ & ~x) | (is_pressed ? 0 : x);
#define ToggleModifierBit(x) if(is_pressed) modifiers_ ^= x;
switch(key) {
default: break;
case Key::Delete: SetModifierBit(0x4000); break;
case Key::CapsLock: ToggleModifierBit(0x2000); break;
case Key::Power: SetModifierBit(0x1000); break;
case Key::LeftControl:
case Key::RightControl:
SetModifierBit(0x0800);
break;
case Key::LeftShift:
case Key::RightShift:
SetModifierBit(0x0400);
break;
case Key::LeftOption:
case Key::RightOption:
SetModifierBit(0x0200);
break;
case Key::Command:
SetModifierBit(0x0100);
break;
case Key::KeypadClear: ToggleModifierBit(0x0080); break;
case Key::Help: ToggleModifierBit(0x0040); break;
}
#undef SetModifierBit
// Ensure service occurs.
post_service_request();
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return true;
}
void Keyboard::clear_all_keys() {
// For all keys currently marked as down, enqueue key-up actions.
std::lock_guard lock_guard(keys_mutex_);
for(size_t key = 0; key < pressed_keys_.size(); key++) {
if(pressed_keys_[key]) {
pending_events_.push_back(0x80 | uint8_t(key));
pressed_keys_[key] = false;
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}
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}
if(!pending_events_.empty()) post_service_request();
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// Mark all modifiers as released.
modifiers_ |= 0xfff8;
}
// MARK: - KeyboardMapper
uint16_t KeyboardMapper::mapped_key_for_key(Inputs::Keyboard::Key key) const {
using Key = Inputs::Keyboard::Key;
using ADBKey = Apple::ADB::Key;
switch(key) {
default: return MachineTypes::MappedKeyboardMachine::KeyNotMapped;
#define Bind(x, y) case Key::x: return uint16_t(ADBKey::y)
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#define BindDirect(x) Bind(x, x)
BindDirect(BackTick);
BindDirect(k1); BindDirect(k2); BindDirect(k3); BindDirect(k4); BindDirect(k5);
BindDirect(k6); BindDirect(k7); BindDirect(k8); BindDirect(k9); BindDirect(k0);
BindDirect(Help);
BindDirect(Home);
BindDirect(PageUp);
BindDirect(Delete);
BindDirect(End);
BindDirect(PageDown);
BindDirect(Escape);
BindDirect(Hyphen);
BindDirect(Equals);
BindDirect(Backspace);
BindDirect(Tab);
BindDirect(F1); BindDirect(F2); BindDirect(F3); BindDirect(F4);
BindDirect(F5); BindDirect(F6); BindDirect(F7); BindDirect(F8);
BindDirect(F9); BindDirect(F10); BindDirect(F11); BindDirect(F12);
BindDirect(Q); BindDirect(W); BindDirect(E); BindDirect(R);
BindDirect(T); BindDirect(Y); BindDirect(U); BindDirect(I);
BindDirect(O); BindDirect(P); BindDirect(A); BindDirect(S);
BindDirect(D); BindDirect(F); BindDirect(G); BindDirect(H);
BindDirect(J); BindDirect(K); BindDirect(L); BindDirect(Z);
BindDirect(X); BindDirect(C); BindDirect(V); BindDirect(B);
BindDirect(N); BindDirect(M);
BindDirect(OpenSquareBracket);
BindDirect(CloseSquareBracket);
BindDirect(Semicolon);
BindDirect(Quote);
BindDirect(Comma);
BindDirect(FullStop);
BindDirect(ForwardSlash);
BindDirect(CapsLock);
BindDirect(LeftShift); BindDirect(RightShift);
BindDirect(LeftControl); BindDirect(RightControl);
BindDirect(LeftOption); BindDirect(RightOption);
Bind(LeftMeta, Command); Bind(RightMeta, Command);
BindDirect(Space);
BindDirect(Backslash);
Bind(Enter, Return);
BindDirect(Left); BindDirect(Right);
BindDirect(Up); BindDirect(Down);
Bind(KeypadDelete, KeypadClear);
BindDirect(KeypadEquals);
BindDirect(KeypadSlash);
BindDirect(KeypadAsterisk);
BindDirect(KeypadMinus);
BindDirect(KeypadPlus);
BindDirect(KeypadEnter);
BindDirect(KeypadDecimalPoint);
BindDirect(Keypad9);
BindDirect(Keypad8);
BindDirect(Keypad7);
BindDirect(Keypad6);
BindDirect(Keypad5);
BindDirect(Keypad4);
BindDirect(Keypad3);
BindDirect(Keypad2);
BindDirect(Keypad1);
BindDirect(Keypad0);
// Leaving unmapped:
// Power, F13, F14, F15
#undef BindDirect
#undef Bind
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}
}