From ea6b535a408e2218bd44b0e97881865096d00e23 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Sat, 5 Mar 2022 20:01:18 +0100
Subject: [PATCH] Add initial implementation of mouse buttons

---
 src/main.c | 34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/src/main.c b/src/main.c
index 22e9797..b9100ab 100644
--- a/src/main.c
+++ b/src/main.c
@@ -38,9 +38,7 @@ time_elapsed(Time since){
 typedef struct Mouse {
     s32 x;
     s32 y;
-    bool left;
-    bool mid;
-    bool right;
+    u8 buttons;
     bool update;
 } Mouse;
 
@@ -110,9 +108,26 @@ poll_mouse(void) {
                 in.mouse.y = CLAMP(
                     in.mouse.y + (s32)mouse_event.value, 0, (s32)screen_height);
             }
+        } else if (mouse_event.type == EV_KEY) {
+            switch (mouse_event.code) {
+                case BTN_LEFT: {
+                    if (mouse_event.value == 1) {
+                        in.mouse.buttons |= 0x01
+                    } else {
+                        in.mouse.buttons &= ~0x01
+                    }
+                } break;
+                case BTN_RIGHT: {
+                    if (mouse_event.value == 1) {
+                        in.mouse.buttons |= 0x10
+                    } else {
+                        in.mouse.buttons &= ~0x10
+                    }
+                } break;
+                default: break;
+            }
         }
         in.mouse.update = true;
-        // TODO: Handle mouse keys
         // DEBUG:
         // printf("MOUSE: (type: %d, code: %d, value: %d)\n",
         //         mouse_event.type, mouse_event.code, mouse_event.value);
@@ -274,7 +289,16 @@ handle_keyboard(void) {
 void
 handle_mouse(void) {
     if (in.mouse.update) {
-        // TODO: Handle mouse keys
+        // Handle mouse keys.
+        devmouse->dat[6] = in.mouse.buttons;
+        if(in.mouse.buttons == 0x10 && (devmouse->dat[6] & 0x01)) {
+            devmouse->dat[7] = 0x01;
+        }
+        if(in.mouse.buttons == 0x01 && (devmouse->dat[6] & 0x10)) {
+            devmouse->dat[7] = 0x10;
+        }
+
+        // Handle mouse location.
         mempoke16(devmouse->dat, 0x2, in.mouse.x);
         mempoke16(devmouse->dat, 0x4, in.mouse.y);
         uxn_eval(&u, mempeek16(devmouse->dat, 0));