Add an option for using custom dialog icons on MacOS

internal/zenutil/osa_generated.go

@@ -55,9 +55,13 @@ fmt.stringFromDate(date.dateValue)
 var app=Application.currentApplication()
 app.includeStandardAdditions=true
 app.activate()
-ObjC.import('stdio')
-ObjC.import('stdlib')
-var res=app.{{.Operation}}({{json .Text}},{{json .Options}})
+ObjC.import("stdlib")
+ObjC.import("stdio")
+var opt={{json .Options}}
+{{- if .IconPath}}
+opt["withIcon"]=Path("{{.IconPath}}")
+{{- end}}
+var res=app.{{.Operation}}({{json .Text}},opt)
 if(res.gaveUp){$.exit(5)}
 if(res.buttonReturned==={{json .Extra}}){$.puts(res.buttonReturned)
 $.exit(1)}

internal/zenutil/osascripts/dialog.gojs

@@ -2,10 +2,13 @@ var app = Application.currentApplication()
 app.includeStandardAdditions = true
 app.activate()
 
-ObjC.import('stdio')
-ObjC.import('stdlib')
-
-var res = app.{{.Operation}}({{json .Text}}, {{json .Options}})
+ObjC.import("stdlib")
+ObjC.import("stdio")
+var opt = {{json .Options}}
+{{- if .IconPath}}
+opt["withIcon"] = Path("{{.IconPath}}")
+{{- end}}
+var res = app.{{.Operation}}({{json .Text}}, opt)
 if (res.gaveUp) {
 	$.exit(5)
 }

internal/zenutil/run_darwin.go

@@ -130,6 +130,7 @@ type Dialog struct {
 	Text      string
 	Extra     *string
 	Options   DialogOptions
+	IconPath  *string
 }
 
 // DialogOptions is internal.

msg_darwin.go

@@ -11,7 +11,7 @@ func message(kind messageKind, text string, opts options) error {
 
 	// dialog is more flexible, alert prettier
 	var dialog bool
-	if opts.icon != 0 { // use if we want to show a specific icon
+	if opts.icon != 0 || opts.iconPath != nil { // use if we want to show a specific icon
 		dialog = true
 	} else if kind == questionKind && opts.cancelLabel == nil { // use for questions with default buttons
 		dialog = true
@@ -20,7 +20,11 @@ func message(kind messageKind, text string, opts options) error {
 	if dialog {
 		data.Operation = "displayDialog"
 		data.Options.Title = opts.title
-		data.Options.Icon = opts.icon.String()
+		if opts.iconPath != nil {
+			data.IconPath = opts.iconPath
+		} else {
+			data.Options.Icon = opts.icon.String()
+		}
 	} else {
 		data.Operation = "displayAlert"
 		data.Options.As = kind.String()

zenity.go

@@ -39,6 +39,7 @@ type options struct {
 	cancelLabel   *string
 	extraButton   *string
 	icon          DialogIcon
+	iconPath      *string
 	defaultCancel bool
 
 	// Message options
@@ -150,6 +151,11 @@ const (
 // Deprecated: use DialogIcon directly.
 func Icon(icon DialogIcon) Option { return icon }
 
+// Icon returns an Option to set an icon loaded from a file.
+func CustomIcon(path string) Option {
+	return funcOption(func(o *options) { o.iconPath = &path })
+}
+
 // Context returns an Option to set a Context that can dismiss the dialog.
 //
 // Dialogs dismissed by ctx return ctx.Err().