From e5d3140cd17e507b99cb41999fcfd9002c1ddef8 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Tue, 22 Aug 2023 09:28:57 -0400
Subject: [PATCH] Avoid flurry of startup events, repeats.

---
 Machines/Apple/ADB/Keyboard.cpp | 7 ++++++-
 Machines/Apple/ADB/Keyboard.hpp | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/Machines/Apple/ADB/Keyboard.cpp b/Machines/Apple/ADB/Keyboard.cpp
index fd89a06df..5eaf2619c 100644
--- a/Machines/Apple/ADB/Keyboard.cpp
+++ b/Machines/Apple/ADB/Keyboard.cpp
@@ -72,8 +72,13 @@ void Keyboard::did_receive_data(const Command &, const std::vector<uint8_t> &dat
 
 
 bool Keyboard::set_key_pressed(Key key, bool is_pressed) {
-	// ADB keyboard events: low 7 bits are a key code; bit 7 is either 0 for pressed or 1 for released.
 	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.
 	pending_events_.push_back(uint8_t(key) | (is_pressed ? 0x00 : 0x80));
 	pressed_keys_[size_t(key)] = is_pressed;
 
diff --git a/Machines/Apple/ADB/Keyboard.hpp b/Machines/Apple/ADB/Keyboard.hpp
index 7438f6bc6..e205d7bdf 100644
--- a/Machines/Apple/ADB/Keyboard.hpp
+++ b/Machines/Apple/ADB/Keyboard.hpp
@@ -106,7 +106,7 @@ class Keyboard: public ReactiveDevice {
 		void did_receive_data(const Command &, const std::vector<uint8_t> &) override;
 
 		std::mutex keys_mutex_;
-		std::array<bool, 128> pressed_keys_;
+		std::array<bool, 128> pressed_keys_{};
 		std::vector<uint8_t> pending_events_;
 		uint16_t modifiers_ = 0xffff;
 };