78 lines
2.2 KiB
Go
78 lines
2.2 KiB
Go
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package introspect
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import (
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"encoding/xml"
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"reflect"
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"strings"
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"github.com/godbus/dbus/v5"
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)
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// Introspectable implements org.freedesktop.Introspectable.
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//
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// You can create it by converting the XML-formatted introspection data from a
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// string to an Introspectable or call NewIntrospectable with a Node. Then,
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// export it as org.freedesktop.Introspectable on you object.
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type Introspectable string
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// NewIntrospectable returns an Introspectable that returns the introspection
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// data that corresponds to the given Node. If n.Interfaces doesn't contain the
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// data for org.freedesktop.DBus.Introspectable, it is added automatically.
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func NewIntrospectable(n *Node) Introspectable {
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found := false
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for _, v := range n.Interfaces {
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if v.Name == "org.freedesktop.DBus.Introspectable" {
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found = true
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break
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}
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}
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if !found {
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n.Interfaces = append(n.Interfaces, IntrospectData)
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}
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b, err := xml.Marshal(n)
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if err != nil {
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panic(err)
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}
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return Introspectable(strings.TrimSpace(IntrospectDeclarationString) + string(b))
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}
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// Introspect implements org.freedesktop.Introspectable.Introspect.
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func (i Introspectable) Introspect() (string, *dbus.Error) {
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return string(i), nil
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}
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// Methods returns the description of the methods of v. This can be used to
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// create a Node which can be passed to NewIntrospectable.
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func Methods(v interface{}) []Method {
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t := reflect.TypeOf(v)
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ms := make([]Method, 0, t.NumMethod())
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for i := 0; i < t.NumMethod(); i++ {
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if t.Method(i).PkgPath != "" {
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continue
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}
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mt := t.Method(i).Type
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if mt.NumOut() == 0 ||
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mt.Out(mt.NumOut()-1) != reflect.TypeOf(&dbus.Error{}) {
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continue
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}
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var m Method
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m.Name = t.Method(i).Name
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m.Args = make([]Arg, 0, mt.NumIn()+mt.NumOut()-2)
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for j := 1; j < mt.NumIn(); j++ {
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if mt.In(j) != reflect.TypeOf((*dbus.Sender)(nil)).Elem() &&
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mt.In(j) != reflect.TypeOf((*dbus.Message)(nil)).Elem() {
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arg := Arg{"", dbus.SignatureOfType(mt.In(j)).String(), "in"}
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m.Args = append(m.Args, arg)
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}
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}
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for j := 0; j < mt.NumOut()-1; j++ {
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arg := Arg{"", dbus.SignatureOfType(mt.Out(j)).String(), "out"}
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m.Args = append(m.Args, arg)
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}
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m.Annotations = make([]Annotation, 0)
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ms = append(ms, m)
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}
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return ms
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}
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