如何向gnome-shell扩展发送字符串

Question

我认为应该使用D-Bus。基本上，我想要这样的东西- https://wiki.gnome.org/Gjs/Examples/DBusClient -但反过来。

在扩展中，有一个函数:

function f(s) { doSomethingWithS; }

这个函数将在运行后被调用:

$ <something> "abc"

…在终端，与s == "abc" .

---

根据@Jasper和@owen在#gnome-shell上对irc.gnome.org的建议，我改编了一些来自https://github.com/GNOME/gnome-shell/blob/master/js/ui/magnifierDBus.js:的代码

const St = imports.gi.St;
const Gio = imports.gi.Gio;
const Lang = imports.lang;
const Main = imports.ui.main;
let text;
function init() {
    text = new St.Label({ text: "0:0", style_class: 'panel-text' });
}
function enable() {
    Main.panel._rightBox.insert_child_at_index(text, 0);
}
function disable() {
    Main.panel._rightBox.remove_child(text);
}
const TextInTaskBarIface = '<node> 
<interface name="com.michalrus.TextInTaskBar"> 
<method name="setText"> 
    <arg type="s" direction="in" /> 
</method> 
</interface> 
</node>';
const TextInTaskBar = new Lang.Class({
    Name: 'TextInTaskBar',
    _init: function() {
        this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(TextInTaskBarIface, this);
        this._dbusImpl.export(Gio.DBus.session, '/com/michalrus/TextInTaskBar');
    },
    setText: function(str) {
        text.text = str;
    }
});

现在，在发出:

% dbus-send --dest=com.michalrus.TextInTaskBar /com/michalrus/TextInTaskBar 
    com.michalrus.TextInTaskBar.setText string:"123"

Answer 1

gnome-shell扩展D-Bus服务器的最终工作版本:

const St = imports.gi.St;
const Gio = imports.gi.Gio;
const Lang = imports.lang;
const Main = imports.ui.main;
let text = null;
let textDBusService = null;
function init() {
    text = new St.Label({ text: "0:0", style_class: 'panel-text' });
    textDBusService = new TextInTaskBar();
}
function enable() {
    Main.panel._rightBox.insert_child_at_index(text, 0);
}
function disable() {
    Main.panel._rightBox.remove_child(text);
}
const TextInTaskBarIface = '<node> 
<interface name="com.michalrus.TextInTaskBar"> 
<method name="setText"> 
    <arg type="s" direction="in" /> 
</method> 
</interface> 
</node>';
const TextInTaskBar = new Lang.Class({
    Name: 'TextInTaskBar',
    _init: function() {
    text.text = "abc";
        this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(TextInTaskBarIface, this);
        this._dbusImpl.export(Gio.DBus.session, '/com/michalrus/TextInTaskBar');
    },
    setText: function(str) {
    text.text = str;
    }
});

电话:

$ gdbus call --session --dest org.gnome.Shell --object-path /com/michalrus/TextInTaskBar --method com.michalrus.TextInTaskBar.setText 'some text'