From 8c328d3eac0f43880ad7a28468248074ed190fb8 Mon Sep 17 00:00:00 2001
From: Jordan Orelli <jordanorelli@gmail.com>
Date: Sat, 17 Jun 2017 19:25:35 -0500
Subject: [PATCH] handle signals

---
 bg/background.go           | 11 +++++++++++
 events/background_event.go |  2 ++
 ui/ui_darwin.go            | 15 +++++++++++++--
 ui/ui_darwin.h             |  5 +++--
 ui/ui_darwin.m             |  8 ++++++--
 5 files changed, 35 insertions(+), 6 deletions(-)

diff --git a/bg/background.go b/bg/background.go
index 70ba8c2..f55757f 100644
--- a/bg/background.go
+++ b/bg/background.go
@@ -1,6 +1,9 @@
 package bg
 
 import (
+	"os"
+	"os/signal"
+
 	"github.com/jordanorelli/dws/events"
 )
 
@@ -10,6 +13,7 @@ func Run(out chan events.BackgroundEvent, in chan events.UserEvent) {
 		out:    out,
 		server: newServer(),
 	}
+	go bg.handleSignals()
 	go bg.listen()
 	bg.run()
 }
@@ -28,3 +32,10 @@ func (bg *background) run() {
 		}
 	}
 }
+
+func (bg *background) handleSignals() {
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt)
+	<-c
+	bg.out <- events.SigIntEvent{}
+}
diff --git a/events/background_event.go b/events/background_event.go
index d70f0e3..e18c66e 100644
--- a/events/background_event.go
+++ b/events/background_event.go
@@ -8,3 +8,5 @@ type BackgroundEvent interface {
 type backgroundEvent struct{ event }
 
 func (e backgroundEvent) isBackgroundEvent() {}
+
+type SigIntEvent struct{ backgroundEvent }
diff --git a/ui/ui_darwin.go b/ui/ui_darwin.go
index 1ba570e..f647d62 100644
--- a/ui/ui_darwin.go
+++ b/ui/ui_darwin.go
@@ -21,7 +21,7 @@ func Desktop() UI {
 	}
 
 	log.Println("Creating new Cocoa UI")
-	C.Initialize()
+	C.initialize()
 	desktopUI = new(cocoaUI)
 	return desktopUI
 }
@@ -35,10 +35,21 @@ func (ui *cocoaUI) Run(out chan events.UserEvent, in chan events.BackgroundEvent
 	log.Println("Running Desktop UI")
 	ui.in = in
 	ui.out = out
-	C.Run()
+	go ui.forwardEvents()
+	C.run()
 	return nil
 }
 
+func (ui *cocoaUI) forwardEvents() {
+	for e := range ui.in {
+		switch e.(type) {
+		case events.SigIntEvent:
+			log.Println("Cocoa UI sees sig int, forwarding to NSApp")
+			C.shutdown()
+		}
+	}
+}
+
 //export selectDirectory
 func selectDirectory(cpath *C.char) {
 	path := C.GoString(cpath)
diff --git a/ui/ui_darwin.h b/ui/ui_darwin.h
index 21275c4..48a1c96 100644
--- a/ui/ui_darwin.h
+++ b/ui/ui_darwin.h
@@ -1,2 +1,3 @@
-void Initialize(void);
-int Run(void);
+void initialize();
+int run();
+void shutdown();
diff --git a/ui/ui_darwin.m b/ui/ui_darwin.m
index 5ffd0d7..1989b8e 100644
--- a/ui/ui_darwin.m
+++ b/ui/ui_darwin.m
@@ -4,15 +4,19 @@
 id defaultAutoreleasePool;
 id appDelegate;
 
-void Initialize(void) {
+void initialize() {
     defaultAutoreleasePool = [NSAutoreleasePool new];
     [NSApplication sharedApplication];
     [NSApp setDelegate: [[AppDelegate new] autorelease]];
     [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
 }
 
-int Run(void) {
+int run() {
     [NSApp run];
     [defaultAutoreleasePool drain];
     return 0;
 }
+
+void shutdown() {
+	[[NSApplication sharedApplication] terminate:nil];
+}