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/* exported AccessDialogDBus */
const { Clutter, Gio, GLib, GObject, Pango, Shell, St } = imports.gi;

const CheckBox = imports.ui.checkBox;
const Dialog = imports.ui.dialog;
const ModalDialog = imports.ui.modalDialog;

const { loadInterfaceXML } = imports.misc.fileUtils;

const RequestIface = loadInterfaceXML('org.freedesktop.impl.portal.Request');
const AccessIface = loadInterfaceXML('org.freedesktop.impl.portal.Access');

var DialogResponse = {
    OK: 0,
    CANCEL: 1,
    CLOSED: 2,
};

var AccessDialog = GObject.registerClass(
class AccessDialog extends ModalDialog.ModalDialog {
    _init(invocation, handle, title, description, body, options) {
        super._init({ styleClass: 'access-dialog' });

        this._invocation = invocation;
        this._handle = handle;

        this._requestExported = false;
        this._request = Gio.DBusExportedObject.wrapJSObject(RequestIface, this);

        for (let option in options)
            options[option] = options[option].deepUnpack();

        this._buildLayout(title, description, body, options);
    }

    _buildLayout(title, description, body, options) {
        // No support for non-modal system dialogs, so ignore the option
        // let modal = options['modal'] || true;
        let denyLabel = options['deny_label'] || _("Deny Access");
        let grantLabel = options['grant_label'] || _("Grant Access");
        let choices = options['choices'] || [];

        let content = new Dialog.MessageDialogContent({ title, description });
        this.contentLayout.add_actor(content);

        this._choices = new Map();

        for (let i = 0; i < choices.length; i++) {
            let [id, name, opts, selected] = choices[i];
            if (opts.length > 0)
                continue; // radio buttons, not implemented

            let check = new CheckBox.CheckBox();
            check.getLabelActor().text = name;
            check.checked = selected == "true";
            content.add_child(check);

            this._choices.set(id, check);
        }

        let bodyLabel = new St.Label({
            text: body,
            x_align: Clutter.ActorAlign.CENTER,
        });
        bodyLabel.clutter_text.ellipsize = Pango.EllipsizeMode.NONE;
        bodyLabel.clutter_text.line_wrap = true;
        content.add_child(bodyLabel);

        this.addButton({
            label: denyLabel,
            action: () => this._sendResponse(DialogResponse.CANCEL),
            key: Clutter.KEY_Escape,
        });
        this.addButton({
            label: grantLabel,
            action: () => this._sendResponse(DialogResponse.OK),
        });
    }

    open() {
        if (!super.open())
            return false;

        let connection = this._invocation.get_connection();
        this._requestExported = this._request.export(connection, this._handle);
        return true;
    }

    CloseAsync(invocation, _params) {
        if (this._invocation.get_sender() != invocation.get_sender()) {
            invocation.return_error_literal(Gio.DBusError,
                                            Gio.DBusError.ACCESS_DENIED,
                                            '');
            return;
        }

        this._sendResponse(DialogResponse.CLOSED);
    }

    _sendResponse(response) {
        if (this._requestExported)
            this._request.unexport();
        this._requestExported = false;

        let results = {};
        if (response == DialogResponse.OK) {
            for (let [id, check] of this._choices) {
                let checked = check.checked ? 'true' : 'false';
                results[id] = new GLib.Variant('s', checked);
            }
        }

        // Delay actual response until the end of the close animation (if any)
        this.connect('closed', () => {
            this._invocation.return_value(new GLib.Variant('(ua{sv})',
                                                           [response, results]));
        });
        this.close();
    }
});

var AccessDialogDBus = class {
    constructor() {
        this._accessDialog = null;

        this._windowTracker = Shell.WindowTracker.get_default();

        this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(AccessIface, this);
        this._dbusImpl.export(Gio.DBus.session, '/org/freedesktop/portal/desktop');

        Gio.DBus.session.own_name('org.gnome.Shell.Portal', Gio.BusNameOwnerFlags.REPLACE, null, null);
    }

    AccessDialogAsync(params, invocation) {
        if (this._accessDialog) {
            invocation.return_error_literal(Gio.DBusError,
                                            Gio.DBusError.LIMITS_EXCEEDED,
                                            'Already showing a system access dialog');
            return;
        }

        let [handle, appId, parentWindow_, title, description, body, options] = params;
        // We probably want to use parentWindow and global.display.focus_window
        // for this check in the future
        if (appId && `${appId}.desktop` !== this._windowTracker.focus_app.id) {
            invocation.return_error_literal(Gio.DBusError,
                                            Gio.DBusError.ACCESS_DENIED,
                                            'Only the focused app is allowed to show a system access dialog');
            return;
        }

        let dialog = new AccessDialog(
            invocation, handle, title, description, body, options);
        dialog.open();

        dialog.connect('closed', () => (this._accessDialog = null));

        this._accessDialog = dialog;
    }
};