From 201aee31196755514573f57816b7a53f4421f920 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Mon, 3 Jun 2024 17:52:43 +0300
Subject: [PATCH] LibInput: Implement key_to_utf8_ansi

This function outputs utf8 encoding of a key event or ansi code for
everything it is applicable (arrows, ctrl+..., ...)
---
 LibInput/KeyEvent.cpp                | 70 ++++++++++++++++++++++++++++
 LibInput/include/LibInput/KeyEvent.h |  1 +
 2 files changed, 71 insertions(+)

diff --git a/LibInput/KeyEvent.cpp b/LibInput/KeyEvent.cpp
index 99a7e59edd..39b563679c 100644
--- a/LibInput/KeyEvent.cpp
+++ b/LibInput/KeyEvent.cpp
@@ -1,6 +1,9 @@
 #include <BAN/Array.h>
 #include <LibInput/KeyEvent.h>
 
+#include <ctype.h>
+#include <string.h>
+
 namespace LibInput
 {
 
@@ -48,4 +51,71 @@ namespace LibInput
 		return (event.shift() ^ event.caps_lock()) ? utf8_upper[static_cast<uint8_t>(key)] : utf8_lower[static_cast<uint8_t>(key)];
 	}
 
+	const char* key_to_utf8_ansi(Key key, uint16_t modifier)
+	{
+		static constexpr const char* utf8_lower[] = {
+			nullptr, nullptr,
+			"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
+			"å", "ä", "ö",
+			"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+			nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+			/*"Insert", "PrintScreen", "Delete", "Home", "End", "PageUp", "PageDown",*/ nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, "\n", " ",
+			"!", "\"", "#", "¤", "%", "&", "/", "§", "½",
+			"(", ")", "[", "]", "{", "}",
+			"=", "?", "+", "\\", "´", "`", "¨", "¸", "\b \b", "@", "£", "$", "€",
+			nullptr, "\t", nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+			"'", "*", "^", "~", "\e[A", "\e[B", "\e[D", "\e[C",
+			",", ";", ".", ":", "-", "_", nullptr, nullptr, "<", ">", "|", "¬", "¦",
+			"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+			"+", "-", "*", "/", "\n", ",",
+			nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+		};
+		static_assert((size_t)Key::Count == sizeof(utf8_lower) / sizeof(*utf8_lower));
+
+		static constexpr const char* utf8_upper[] = {
+			nullptr, nullptr,
+			"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z",
+			"Å", "Ä", "Ö",
+			"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+			nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+			/*"Insert", "PrintScreen", "Delete", "Home", "End", "PageUp", "PageDown",*/ nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, "\n", " ",
+			"!", "\"", "#", "¤", "%", "&", "/", "§", "½",
+			"(", ")", "[", "]", "{", "}",
+			"=", "?", "+", "\\", "´", "`", "¨", "¸", "\b \b", "@", "£", "$", "€",
+			nullptr, "\t", nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+			"'", "*", "^", "~", "\e[A", "\e[B", "\e[D", "\e[C",
+			",", ";", ".", ":", "-", "_", nullptr, nullptr, "<", ">", "|", "¬", "¦",
+			"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+			"+", "-", "*", "/", "\n", ",",
+			nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+		};
+		static_assert((size_t)Key::Count == sizeof(utf8_upper) / sizeof(*utf8_upper));
+
+		static constexpr const char* utf8_ctrl[] = {
+			nullptr, nullptr,
+			"\x01", "\x02", "\x03", "\x04", "\x05", "\x06", "\x07", "\x08", "\x09", "\x0A", "\x0B", "\x0C", "\x0D", "\x0E", "\x0F", "\x10", "\x11", "\x12", "\x13", "\x14", "\x15", "\x16", "\x17", "\x18", "\x19", "\x1A",
+			"Å", "Ä", "Ö",
+			"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+			nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+			/*"Insert", "PrintScreen", "Delete", "Home", "End", "PageUp", "PageDown",*/ nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, "\n", " ",
+			"!", "\"", "#", "¤", "%", "&", "/", "§", "½",
+			"(", ")", "[", "]", "{", "}",
+			"=", "?", "+", "\\", "´", "`", "¨", "¸", "\b \b", "@", "£", "$", "€",
+			nullptr, "\t", nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+			"'", "*", "^", "~", "\e[A", "\e[B", "\e[D", "\e[C",
+			",", ";", ".", ":", "-", "_", nullptr, nullptr, "<", ">", "|", "¬", "¦",
+			"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
+			"+", "-", "*", "/", "\n", ",",
+			nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+		};
+		static_assert((size_t)Key::Count == sizeof(utf8_upper) / sizeof(*utf8_upper));
+
+		KeyEvent event { .modifier = modifier, .key = key };
+		if (event.ctrl())
+			return utf8_ctrl[static_cast<uint8_t>(key)];
+		if (event.shift() ^ event.caps_lock())
+			return utf8_upper[static_cast<uint8_t>(key)];
+		return utf8_lower[static_cast<uint8_t>(key)];
+	}
+
 }
diff --git a/LibInput/include/LibInput/KeyEvent.h b/LibInput/include/LibInput/KeyEvent.h
index 722e49feb2..f71333468b 100644
--- a/LibInput/include/LibInput/KeyEvent.h
+++ b/LibInput/include/LibInput/KeyEvent.h
@@ -101,5 +101,6 @@ namespace LibInput
 	};
 
 	const char* key_to_utf8(Key key, uint16_t modifier);
+	const char* key_to_utf8_ansi(Key key, uint16_t modifier);
 
 }