all: rename the gioui.org/ui module to gioui.org

The "ui" is redundant and stutters.

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

key/key.go

@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+/*
+Package key implements key and text events and operations.
+
+The InputOp operations is used for declaring key input handlers. Use
+an implementation of the Queue interface from package ui to receive
+events.
+*/
+package key
+
+import (
+	"gioui.org/ui"
+	"gioui.org/internal/opconst"
+)
+
+// InputOp declares a handler ready for key events.
+// Key events are in general only delivered to the
+// focused key handler. Set the Focus flag to request
+// the focus.
+type InputOp struct {
+	Key   ui.Key
+	Focus bool
+}
+
+// HideInputOp request that any on screen text input
+// be hidden.
+type HideInputOp struct{}
+
+// A FocusEvent is generated when a handler gains or loses
+// focus.
+type FocusEvent struct {
+	Focus bool
+}
+
+// An Event is generated when a key is pressed. For text input
+// use EditEvent.
+type Event struct {
+	// Name is the rune character that most closely
+	// match the key. For letters, the upper case form
+	// is used.
+	Name rune
+	// Modifiers is the set of active modifiers when
+	// the key was pressed.
+	Modifiers Modifiers
+}
+
+// An EditEvent is generated when text is input.
+type EditEvent struct {
+	Text string
+}
+
+// Modifiers
+type Modifiers uint32
+
+const (
+	// ModCommand is the command modifier. On macOS
+	// it is the Cmd key, on other platforms the Ctrl
+	// key.
+	ModCommand Modifiers = 1 << iota
+	// THe shift key.
+	ModShift
+)
+
+const (
+	// Runes for special keys.
+	NameLeftArrow      = '←'
+	NameRightArrow     = '→'
+	NameUpArrow        = '↑'
+	NameDownArrow      = '↓'
+	NameReturn         = '⏎'
+	NameEnter          = '⌤'
+	NameEscape         = '⎋'
+	NameHome           = '⇱'
+	NameEnd            = '⇲'
+	NameDeleteBackward = '⌫'
+	NameDeleteForward  = '⌦'
+	NamePageUp         = '⇞'
+	NamePageDown       = '⇟'
+)
+
+// Contain reports whether m contains all modifiers
+// in m2.
+func (m Modifiers) Contain(m2 Modifiers) bool {
+	return m&m2 == m2
+}
+
+func (h InputOp) Add(o *ui.Ops) {
+	data := make([]byte, opconst.TypeKeyInputLen)
+	data[0] = byte(opconst.TypeKeyInput)
+	if h.Focus {
+		data[1] = 1
+	}
+	o.Write(data, h.Key)
+}
+
+func (h HideInputOp) Add(o *ui.Ops) {
+	data := make([]byte, opconst.TypeHideInputLen)
+	data[0] = byte(opconst.TypeHideInput)
+	o.Write(data)
+}
+
+func (EditEvent) ImplementsEvent()  {}
+func (Event) ImplementsEvent()      {}
+func (FocusEvent) ImplementsEvent() {}