all: initial import

Signed-off-by: Elias Naur <mail@eliasnaur.com>

ui/key/key.go

@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+package key
+
+type OpHandler struct {
+	Key   Key
+	Focus bool
+}
+
+type OpHideInput struct{}
+
+type Key interface{}
+
+type Events interface {
+	For(k Key) []Event
+}
+
+type Event interface {
+	isKeyEvent()
+}
+
+type Focus struct {
+	Focus bool
+}
+
+type Chord struct {
+	Name      rune
+	Modifiers Modifiers
+}
+
+type Edit struct {
+	Text string
+}
+
+type Modifiers uint32
+
+type TextInputState uint8
+
+const (
+	ModCommand Modifiers = 1 << iota
+)
+
+const (
+	TextInputKeep TextInputState = iota
+	TextInputFocus
+	TextInputClosed
+	TextInputOpen
+)
+
+const (
+	NameLeftArrow      = '←'
+	NameRightArrow     = '→'
+	NameUpArrow        = '↑'
+	NameDownArrow      = '↓'
+	NameReturn         = '⏎'
+	NameEnter          = '⌤'
+	NameEscape         = '⎋'
+	NameHome           = '⇱'
+	NameEnd            = '⇲'
+	NameDeleteBackward = '⌫'
+	NameDeleteForward  = '⌦'
+	NamePageUp         = '⇞'
+	NamePageDown       = '⇟'
+)
+
+func (OpHandler) ImplementsOp()   {}
+func (OpHideInput) ImplementsOp() {}
+
+func (Edit) ImplementsEvent()  {}
+func (Chord) ImplementsEvent() {}
+func (Focus) ImplementsEvent() {}
+func (Edit) isKeyEvent()       {}
+func (Chord) isKeyEvent()      {}
+func (Focus) isKeyEvent()      {}