don't assume xdg-open, use open on iOS and start on Windows

config/config.go

@@ -809,6 +809,11 @@ func getViewer(v *ViewerTOML, def *ViewerTOML) (program, args string, terminal,
 	if v.Reverse != nil {
 		reverse = *v.Reverse
 	}
+	if *v.Program == "TUT_OS_DEFAULT" {
+		var argsSlice []string
+		program, argsSlice = util.GetDefaultForOS()
+		args = strings.Join(argsSlice, " ")
+	}
 	return
 }
 
@@ -851,7 +856,7 @@ func parseGeneral(cfg GeneralTOML) General {
 
 	def := ConfigDefault.General
 	general.Editor = NilDefaultString(cfg.Editor, def.Editor)
-	if general.Editor == "USE_TUT_INTERNAL" {
+	if general.Editor == "TUT_USE_INTERNAL" {
 		general.UseInternalEditor = true
 	}
 	general.Confirmation = NilDefaultBool(cfg.Confirmation, def.Confirmation)

config/toml_default.go

@@ -19,7 +19,7 @@ func ip64(i int64) *int64 {
 
 var ConfigDefault = ConfigTOML{
 	General: GeneralTOML{
-		Editor:              sp("USE_TUT_INTERNAL"),
+		Editor:              sp("TUT_USE_INTERNAL"),
 		Confirmation:        bt,
 		MouseSupport:        bf,
 		DateFormat:          sp("2006-01-02 15:04"),
@@ -89,28 +89,28 @@ var ConfigDefault = ConfigTOML{
 	},
 	Media: MediaTOML{
 		Image: &ViewerTOML{
-			Program:  sp("xdg-open"),
+			Program:  sp("TUT_OS_DEFAULT"),
 			Args:     sp(""),
 			Terminal: bf,
 			Single:   bt,
 			Reverse:  bf,
 		},
 		Video: &ViewerTOML{
-			Program:  sp("xdg-open"),
+			Program:  sp("TUT_OS_DEFAULT"),
 			Args:     sp(""),
 			Terminal: bf,
 			Single:   bt,
 			Reverse:  bf,
 		},
 		Audio: &ViewerTOML{
-			Program:  sp("xdg-open"),
+			Program:  sp("TUT_OS_DEFAULT"),
 			Args:     sp(""),
 			Terminal: bf,
 			Single:   bt,
 			Reverse:  bf,
 		},
 		Link: &ViewerTOML{
-			Program:  sp("xdg-open"),
+			Program:  sp("TUT_OS_DEFAULT"),
 			Args:     sp(""),
 			Terminal: bf,
 			Single:   bt,

util/xdg.go

@@ -1,7 +1,26 @@
 package util
 
-import "os/exec"
+import (
+	"os/exec"
+	"runtime"
+)
+
+func GetDefaultForOS() (program string, args []string) {
+	switch runtime.GOOS {
+	case "windows":
+		program = "start"
+		args = []string{"/wait"}
+	case "darwin":
+		program = "open"
+		args = []string{"-W"}
+	default:
+		program = "xdg-open"
+	}
+	return program, args
+}
 
 func OpenURL(url string) {
-	exec.Command("xdg-open", url).Start()
+	program, args := GetDefaultForOS()
+	args = append(args, url)
+	exec.Command(program, args...).Start()
 }