Adding modding folder with a hacked build.

modding/hacked/ui/input/Modifier.go

@@ -0,0 +1,34 @@
+package input
+
+// Modifier is a collection of currently pressed modifier keys.
+type Modifier uint32
+
+// Constants for common modifier.
+const (
+	ModNone    = Modifier(0x00000000)
+	ModShift   = Modifier(0x00000001)
+	ModControl = Modifier(0x00000002)
+	ModAlt     = Modifier(0x00000004)
+	ModSuper   = Modifier(0x00000008)
+)
+
+// IsClear returns true if nothing is set.
+func (mod Modifier) IsClear() bool {
+	return mod == ModNone
+}
+
+// With returns a combination of this modifier and the given one.
+func (mod Modifier) With(other Modifier) Modifier {
+	return Modifier(uint32(mod) | uint32(other))
+}
+
+// Without returns the result of this modifier without the given one.
+func (mod Modifier) Without(other Modifier) Modifier {
+	return Modifier(uint32(mod) & ^uint32(other))
+}
+
+// Has returns true if the given modifier is included in this set.
+// This modifier can have more keys set than the requested and still return true.
+func (mod Modifier) Has(other Modifier) bool {
+	return (uint32(mod) | uint32(other)) == uint32(mod)
+}