rename plugin to backend

backend.go

@@ -0,0 +1,69 @@
+/*
+ *    Copyright (c) 2018 Unrud<unrud@outlook.com>
+ *
+ *    This file is part of Remote-Touchpad.
+ *
+ *    Foobar is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    Remote-Touchpad is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package main
+
+type PointerButton int
+type Key int
+
+const (
+	PointerButtonLeft PointerButton = iota
+	PointerButtonRight
+	PointerButtonMiddle
+	PointerButtonLimit
+)
+
+const (
+	KeyVolumeMute Key = iota
+	KeyVolumeDown
+	KeyVolumeUp
+	KeyMediaPlayPause
+	KeyMediaPrevTrack
+	KeyMediaNextTrack
+	KeyLimit
+)
+
+type BackendInfo struct {
+	Name string
+	Init func() (Backend, error)
+}
+
+var Backends []BackendInfo = []BackendInfo{
+	{"X11", InitX11Backend},
+	{"RemoteDesktop portal", InitPortalBackend},
+	{"Windows", InitWindowsBackend},
+}
+
+type UnsupportedPlatformError struct {
+	err error
+}
+
+func (e UnsupportedPlatformError) Error() string {
+	return e.err.Error()
+}
+
+type Backend interface {
+	Close() error
+	KeyboardText(text string) error
+	KeyboardKey(key Key) error
+	PointerButton(button PointerButton, press bool) error
+	PointerMove(deltaX, deltaY int) error
+	PointerScroll(deltaHorizontal, deltaVertical int) error
+	PointerScrollFinish() error
+}