refactor(win32): downgrade unknown virtual key message to debug level

closes #503

build.zig.zon

@@ -30,8 +30,8 @@
             .hash = "fuzzig-0.1.1-Ji0xivxIAQBD0g8O_NV_0foqoPf3elsg9Sc3pNfdVH4D",
         },
         .vaxis = .{
-            .url = "git+https://github.com/neurocyte/libvaxis?ref=main#4c4b9a78693767b945016a2dd28d86cf2a8eb8c4",
-            .hash = "vaxis-0.5.1-BWNV_I9KCQDMo0g6nTnS_TS8OJEpdbBfXTXESSVjCMcT",
+            .url = "git+https://github.com/neurocyte/libvaxis?ref=main#1f6c7222f59607bff0ee8d7c6a0637a05bceffcd",
+            .hash = "vaxis-0.5.1-BWNV_CNLCQDmr-D_UzqGRAngktQt7hiGTRf1gyozwxcG",
         },
         .zeit = .{
             .url = "git+https://github.com/rockorager/zeit?ref=zig-0.15#ed2ca60db118414bda2b12df2039e33bad3b0b88",

src/win32/gui.zig

@@ -748,7 +748,54 @@ fn sendKey(
         win32.GetLastError(),
     );
 
-    const mods: vaxis.Key.Modifiers = .{
+    const win_key_flags: WinKeyFlags = @bitCast(@as(u32, @intCast(0xffffffff & lparam)));
+    const winkey: WinKey = .{
+        .vk = @intCast(0xffff & wparam),
+        .extended = win_key_flags.extended,
+    };
+
+    const is_altgr: bool = blk: {
+        if (winkey.vk == @intFromEnum(win32.VK_CONTROL)) {
+            var next: win32.MSG = undefined;
+            if (win32.PeekMessageW(&next, null, win32.WM_KEYFIRST, win32.WM_KEYLAST, win32.PM_NOREMOVE) != 0) {
+                const next_win_key_flags: WinKeyFlags = @bitCast(@as(u32, @intCast(0xffffffff & next.lParam)));
+                const next_winkey: WinKey = .{
+                    .vk = @intCast(0xffff & next.wParam),
+                    .extended = next_win_key_flags.extended,
+                };
+                if (next_winkey.vk == @intFromEnum(win32.VK_MENU) and next_win_key_flags.extended) {
+                    _ = win32.PeekMessageW(&next, null, win32.WM_KEYFIRST, win32.WM_KEYLAST, win32.PM_REMOVE);
+                    break :blk true;
+                }
+            }
+        }
+        const right_alt = keyboard_state[@intFromEnum(win32.VK_RMENU)] & 0x80 != 0;
+        const left_ctrl = keyboard_state[@intFromEnum(win32.VK_LCONTROL)] & 0x80 != 0;
+        const right_ctrl = keyboard_state[@intFromEnum(win32.VK_RCONTROL)] & 0x80 != 0;
+        break :blk right_alt and left_ctrl and !right_ctrl;
+    };
+
+    if (is_altgr) {
+        if (winkey.vk == @intFromEnum(win32.VK_CONTROL) or
+            winkey.vk == @intFromEnum(win32.VK_LCONTROL) or
+            winkey.vk == @intFromEnum(win32.VK_MENU) or
+            winkey.vk == @intFromEnum(win32.VK_RMENU))
+        {
+            std.log.debug("dropped AltGr key event: {!t} {t}", .{ std.meta.intToEnum(win32.VIRTUAL_KEY, winkey.vk), kind });
+            return;
+        }
+    }
+
+    const mods: vaxis.Key.Modifiers = if (is_altgr) .{
+        .shift = (0 != (keyboard_state[@intFromEnum(win32.VK_SHIFT)] & 0x80)),
+        .alt = (0 != (keyboard_state[@intFromEnum(win32.VK_LMENU)] & 0x80)),
+        .ctrl = (0 != (keyboard_state[@intFromEnum(win32.VK_RCONTROL)] & 0x80)),
+        .super = false,
+        .hyper = false,
+        .meta = false,
+        .caps_lock = (0 != (keyboard_state[@intFromEnum(win32.VK_CAPITAL)] & 1)),
+        .num_lock = false,
+    } else .{
         .shift = (0 != (keyboard_state[@intFromEnum(win32.VK_SHIFT)] & 0x80)),
         .alt = (0 != (keyboard_state[@intFromEnum(win32.VK_MENU)] & 0x80)),
         .ctrl = (0 != (keyboard_state[@intFromEnum(win32.VK_CONTROL)] & 0x80)),
@@ -769,11 +816,6 @@ fn sendKey(
         .release => input.event.release,
     };
 
-    const win_key_flags: WinKeyFlags = @bitCast(@as(u32, @intCast(0xffffffff & lparam)));
-    const winkey: WinKey = .{
-        .vk = @intCast(0xffff & wparam),
-        .extended = win_key_flags.extended,
-    };
     if (winkey.skipToUnicode()) |codepoint| {
         state.pid.send(.{
             "RDR",
@@ -790,8 +832,6 @@ fn sendKey(
     const max_char_count = 20;
     var char_buf: [max_char_count + 1]u16 = undefined;
 
-    // release control key when getting the unicode character of this key
-    keyboard_state[@intFromEnum(win32.VK_CONTROL)] = 0;
     const unicode_result = win32.ToUnicode(
         winkey.vk,
         win_key_flags.scan_code,
@@ -814,7 +854,7 @@ fn sendKey(
     }
 
     if (unicode_result == 0) {
-        std.log.warn("unknown virtual key {f} (0x{x})", .{ winkey, winkey.vk });
+        std.log.debug("unknown virtual key {f} (0x{x})", .{ winkey, winkey.vk });
         return;
     }
     for (char_buf[0..@intCast(unicode_result)]) |codepoint| {