From 25bc6acdfd132a4d67fbba934dc05e5539072a30 Mon Sep 17 00:00:00 2001
From: Přemysl Eric Janouch <p@janouch.name>
Date: Tue, 7 Dec 2021 21:05:07 +0100
Subject: WIP: ht: commit whatever I was trying out

---
 ht/gen-keysyms-new.sh | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100755 ht/gen-keysyms-new.sh

(limited to 'ht/gen-keysyms-new.sh')

diff --git a/ht/gen-keysyms-new.sh b/ht/gen-keysyms-new.sh
new file mode 100755
index 0000000..388d946
--- /dev/null
+++ b/ht/gen-keysyms-new.sh
@@ -0,0 +1,94 @@
+#!/bin/sh
+gofmt <<EOF | sed 's, *//$,,'
+// Code generated by running "go generate" in janouch.name/haven. DO NOT EDIT.
+
+package $GOPACKAGE
+
+import (
+	"strings"
+	"janouch.name/haven/nexgb/xproto"
+)
+
+$(curl --silent --show-error \
+	https://cgit.freedesktop.org/xorg/proto/x11proto/plain/keysymdef.h \
+	https://cgit.freedesktop.org/xorg/proto/x11proto/plain/XF86keysym.h \
+| perl -lne '
+	next unless /^\#define\s+
+		(XF86)?(XK_)([a-zA-Z_0-9]+)\s+
+		0x([0-9a-fA-F]+)\s*
+		(?:\/\*\s*(.*?)\s*\*\/)?\s*
+	$/x;
+
+	my ($name, $ident, $hex, $comment) =
+		(($1 // "") . $3,  ($1 // "") . $2 . $3, lc $4, ($5 // ""));
+
+	# They are already somewhat sorted in the source file.
+	push @a, { hex => $hex, ident => $ident, comment => $comment };
+
+	$nametokeysym{$name} = $ident;
+
+	# All but the first name listed should be considered deprecated.
+	$keysymtoname{$ident} = $name unless exists $seen{$hex};
+	$seen{$hex}++;
+
+	# TODO: Try stringer, see
+	# https://eli.thegreenplace.net/2021/a-comprehensive-guide-to-go-generate/
+	END {
+		print "const (";
+		print "$_->{ident} = 0x$_->{hex} // $_->{comment}" for @a;
+		print ")";
+
+		# Very large tables, should be an on-demand package :(
+		#
+		# KeysymToName/NameToKeysym can also be compress/lzw (small code),
+		# that may reduce string data to about 1/3.  It's still rather small
+		# (27K -> 8K), I'm not sure where all those bytes come from.
+		#
+		# KeysymToName might be generated from NameToKeysym.
+		# KeysymToName may just be an index into the ntk constant.
+		#
+		# Actually we may just include a $name => $hex table and screw
+		# all else.  But the text still begs for compression and the numbers
+		# for filtering and compression.
+		#
+		# Or actually []{$hex, $name}, stable sorted by $hex, and having
+		# the $name be an index into a constant.  On construction we keep
+		# a map so that only the first $hex occurrence receives a name.
+		#
+		# My biggest gripe is probably source code size that won't go down
+		# because the constants are just so large (158K).
+
+		my (@ktnK, @ktnV);
+		for (sort keys %keysymtoname) {
+			push @ktnK, $_;
+			push @ktnV, $keysymtoname{$_};
+		}
+		print "var ktnKeys = []xproto.Keysym{${\join \", \", @ktnK}}";
+		print "var ktnValues = \"${\join \" \", @ktnV}\"";
+
+		my (@ntkK, @ntkV);
+		for (sort keys %nametokeysym) {
+			push @ntkK, $_;
+			push @ntkV, $nametokeysym{$_};
+		}
+		print "var ntkKeys = \"${\join \" \", @ntkK}\"";
+		print "var ntkValues = []xproto.Keysym{${\join \", \", @ntkV}}";
+	}
+')
+
+// KeysymToName maps X11 keysym constants to their names.
+var KeysymToName = map[xproto.Keysym]string{}
+
+// NameToKeysym maps X11 keysym names to their constants.
+var NameToKeysym = map[string]xproto.Keysym{}
+
+func init() {
+	x := strings.Split(ktnValues, " ")
+	for i, keysym := range ktnKeys {
+		KeysymToName[keysym] = x[i]
+	}
+	for i, name := range strings.Split(ntkKeys, " ") {
+		NameToKeysym[name] = ntkValues[i]
+	}
+}
+EOF
-- 
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