Rename backend to controller

controller.go

@@ -0,0 +1,87 @@
+/*
+ *    Copyright (c) 2018 Unrud <unrud@outlook.com>
+ *
+ *    This file is part of Remote-Touchpad.
+ *
+ *    Remote-Touchpad 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 Remote-Touchpad.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package main
+
+import "sort"
+
+type PointerButton int
+type Key int
+
+const (
+	PointerButtonLeft PointerButton = iota
+	PointerButtonRight
+	PointerButtonMiddle
+	PointerButtonLimit
+)
+
+const (
+	KeyVolumeMute Key = iota
+	KeyVolumeDown
+	KeyVolumeUp
+	KeyMediaPlayPause
+	KeyMediaPrevTrack
+	KeyMediaNextTrack
+	KeyBrowserBack
+	KeyBrowserForward
+	KeySuper
+	KeyLeft
+	KeyRight
+	KeyUp
+	KeyDown
+	KeyHome
+	KeyEnd
+	KeyBackSpace
+	KeyDelete
+	KeyReturn
+	KeyLimit
+)
+
+type ControllerInfo struct {
+	Name string
+	Init func() (Controller, error)
+
+	priority int
+}
+
+var Controllers []ControllerInfo
+
+func RegisterController(name string, init func() (Controller, error), priority int) {
+	Controllers = append(Controllers, ControllerInfo{name, init, priority})
+	sort.SliceStable(Controllers, func(i, j int) bool {
+		return Controllers[i].priority < Controllers[j].priority
+	})
+}
+
+type UnsupportedPlatformError struct {
+	err error
+}
+
+func (e UnsupportedPlatformError) Error() string {
+	return e.err.Error()
+}
+
+type Controller 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, finish bool) error
+}