Adding upstream version 0.0~git20250520.a1d9079+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

event/touch/touch.go

@@ -0,0 +1,72 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package touch defines an event for touch input.
+//
+// See the golang.org/x/mobile/app package for details on the event model.
+package touch
+
+// The best source on android input events is the NDK: include/android/input.h
+//
+// iOS event handling guide:
+// https://developer.apple.com/library/ios/documentation/EventHandling/Conceptual/EventHandlingiPhoneOS
+
+import (
+	"fmt"
+)
+
+// Event is a touch event.
+type Event struct {
+	// X and Y are the touch location, in pixels.
+	X, Y float32
+
+	// Sequence is the sequence number. The same number is shared by all events
+	// in a sequence. A sequence begins with a single TypeBegin, is followed by
+	// zero or more TypeMoves, and ends with a single TypeEnd. A Sequence
+	// distinguishes concurrent sequences but its value is subsequently reused.
+	Sequence Sequence
+
+	// Type is the touch type.
+	Type Type
+}
+
+// Sequence identifies a sequence of touch events.
+type Sequence int64
+
+// Type describes the type of a touch event.
+type Type byte
+
+const (
+	// TypeBegin is a user first touching the device.
+	//
+	// On Android, this is a AMOTION_EVENT_ACTION_DOWN.
+	// On iOS, this is a call to touchesBegan.
+	TypeBegin Type = iota
+
+	// TypeMove is a user dragging across the device.
+	//
+	// A TypeMove is delivered between a TypeBegin and TypeEnd.
+	//
+	// On Android, this is a AMOTION_EVENT_ACTION_MOVE.
+	// On iOS, this is a call to touchesMoved.
+	TypeMove
+
+	// TypeEnd is a user no longer touching the device.
+	//
+	// On Android, this is a AMOTION_EVENT_ACTION_UP.
+	// On iOS, this is a call to touchesEnded.
+	TypeEnd
+)
+
+func (t Type) String() string {
+	switch t {
+	case TypeBegin:
+		return "begin"
+	case TypeMove:
+		return "move"
+	case TypeEnd:
+		return "end"
+	}
+	return fmt.Sprintf("touch.Type(%d)", t)
+}