79 lines
2.2 KiB
Go
79 lines
2.2 KiB
Go
// Copyright 2021 The Oto Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build darwin && !ios
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package oto
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import (
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"unsafe"
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"github.com/ebitengine/purego"
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"github.com/ebitengine/purego/objc"
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)
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const defaultOneBufferSizeInBytes = 2048
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// setNotificationHandler sets a handler for sleep/wake notifications.
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func setNotificationHandler() error {
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appkit, err := purego.Dlopen("/System/Library/Frameworks/AppKit.framework/Versions/Current/AppKit", purego.RTLD_GLOBAL)
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if err != nil {
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return err
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}
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// Create the Observer object
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var class objc.Class
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class, err = objc.RegisterClass("OtoNotificationObserver", objc.GetClass("NSObject"), nil, nil,
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[]objc.MethodDef{
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{
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Cmd: objc.RegisterName("receiveSleepNote:"),
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Fn: setGlobalPause,
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},
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{
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Cmd: objc.RegisterName("receiveWakeNote:"),
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Fn: setGlobalResume,
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},
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})
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observer := objc.ID(class).Send(objc.RegisterName("new"))
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notificationCenter := objc.ID(objc.GetClass("NSWorkspace")).Send(objc.RegisterName("sharedWorkspace")).Send(objc.RegisterName("notificationCenter"))
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// Dlsym returns a pointer to the object so dereference it
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s, err := purego.Dlsym(appkit, "NSWorkspaceWillSleepNotification")
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if err != nil {
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return err
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}
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notificationCenter.Send(objc.RegisterName("addObserver:selector:name:object:"),
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observer,
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objc.RegisterName("receiveSleepNote:"),
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*(*uintptr)(unsafe.Pointer(s)),
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0,
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)
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s, err = purego.Dlsym(appkit, "NSWorkspaceDidWakeNotification")
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if err != nil {
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return err
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}
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notificationCenter.Send(objc.RegisterName("addObserver:selector:name:object:"),
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observer,
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objc.RegisterName("receiveWakeNote:"),
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*(*uintptr)(unsafe.Pointer(s)),
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0,
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)
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return nil
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}
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