From 4f1ae4fa4250369919a975f5568425f6791b2489 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sat, 10 Jul 2021 18:36:50 +0200
Subject: Fixed interrupts and added keyboard handler

---
 src/loader/sel.c | 46 +++++++++++++++++++++++++++++++++++++---------
 1 file changed, 37 insertions(+), 9 deletions(-)

(limited to 'src/loader/sel.c')

diff --git a/src/loader/sel.c b/src/loader/sel.c
index acdc783..9052712 100644
--- a/src/loader/sel.c
+++ b/src/loader/sel.c
@@ -2,7 +2,9 @@
 // Selection interface
 
 #include <cfg.h>
+#include <cpu.h>
 #include <def.h>
+#include <int.h>
 #include <log.h>
 #include <pnc.h>
 #include <sel.h>
@@ -22,29 +24,55 @@ static u8 sel_entry_add(struct cfg_entry *entry)
 	return 0;
 }
 
-// TODO: Keyboard listener
+static u8 sel_entry_exists(u8 entry)
+{
+	return !!sel_entries[entry].cfg;
+}
+
 static void sel_entry_select(u8 entry)
 {
-	cfg_exec(sel_entries[entry].cfg);
+	if (sel_entry_exists(entry))
+		cfg_exec(sel_entries[entry].cfg);
+	else
+		log("Invalid selection\n");
 }
 
 static void sel_entries_draw(void)
 {
-	for (u8 i = 0; i < COUNT(sel_entries); i++) {
-		if (!sel_entries[i].cfg)
-			break;
-
+	for (u8 i = 0; sel_entry_exists(i); i++)
 		vga_log("> '%s' (%s)\n", sel_entries[i].cfg->name, sel_entries[i].cfg->path);
-	}
+}
+
+// Using PS2 magic
+static void sel_keyboard_handler(void)
+{
+	static u8 row = 0;
+
+	while (!(inb(0x64) & 1)) // Wait for data (bit 0 gets set)
+		;
+	u8 data = inb(0x60);
+
+	// Reset previous selection
+	vga_put_at('>', 0, row + 2, 0x07);
+
+	if (data == 0x24 && sel_entry_exists(row + 1)) // j/down key
+		row++;
+	else if (data == 0x25 && row > 0) // k/up key
+		row--;
+	else if (data == (0x1c | 0x80)) // enter key release (| 0x80)
+		sel_entry_select(row);
+
+	// Draw selection
+	vga_put_at('#', 0, row + 2, 0x03);
 }
 
 void sel_draw(void)
 {
 	vga_clear();
+	vga_log("SegelBoot by Marvin Borner\n\n");
 
 	cfg_foreach(&sel_entry_add);
 	sel_entries_draw();
 
-	// Just for testing
-	sel_entry_select(0);
+	int_event_handler_add(1, &sel_keyboard_handler);
 }
-- 
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