anotherim-desktop/main/src/ui/chat_input/encryption_button.vala

using Gtk;
using Gee;

using Dino.Entities;

namespace Dino.Ui {

public class EncryptionButton {

    public signal void encryption_changed(Plugins.EncryptionListEntry? encryption_entry);

    private MenuButton menu_button;
    private Conversation? conversation;
    private CheckButton? button_unencrypted;
    private Map<CheckButton, Plugins.EncryptionListEntry> encryption_radios = new HashMap<CheckButton, Plugins.EncryptionListEntry>();
    private string? current_icon;
    private StreamInteractor stream_interactor;

    public EncryptionButton(StreamInteractor stream_interactor, MenuButton menu_button) {
        this.stream_interactor = stream_interactor;
        this.menu_button = menu_button;

        Builder builder = new Builder.from_resource("/im/dino/Dino/menu_encryption.ui");
        menu_button.popover = builder.get_object("menu_encryption") as PopoverMenu;
        Box encryption_box = builder.get_object("encryption_box") as Box;
        button_unencrypted = builder.get_object("button_unencrypted") as CheckButton;
        button_unencrypted.toggled.connect(encryption_button_toggled);

        stream_interactor.get_module(MucManager.IDENTITY).room_info_updated.connect((account, muc_jid) => {
            if (conversation != null && conversation.account.equals(account) && conversation.counterpart.equals(muc_jid)) {
                update_visibility();
            }
        });

        Application app = GLib.Application.get_default() as Application;
        foreach (var e in app.plugin_registry.encryption_list_entries) {
            CheckButton btn = new CheckButton.with_label(e.name);
            btn.set_group(button_unencrypted);
            encryption_radios[btn] = e;
            btn.toggled.connect(encryption_button_toggled);
            btn.visible = true;
            encryption_box.prepend(btn);
        }
        menu_button.activate.connect(update_encryption_menu_state);
    }

    private void encryption_button_toggled() {
        foreach (CheckButton e in encryption_radios.keys) {
            if (e.get_active()) {
                conversation.encryption = encryption_radios[e].encryption;
                encryption_changed(encryption_radios[e]);
                update_encryption_menu_icon();
                return;
            }
        }

        // Selected unencrypted
        conversation.encryption = Encryption.NONE;
        update_encryption_menu_icon();
        encryption_changed(null);
    }

    private void update_encryption_menu_state() {
        foreach (CheckButton e in encryption_radios.keys) {
            if (conversation.encryption == encryption_radios[e].encryption) {
                e.set_active(true);
                encryption_changed(encryption_radios[e]);
            }
        }
        if (conversation.encryption == Encryption.NONE) {
            button_unencrypted.set_active(true);
            encryption_changed(null);
        }
    }

    private void set_icon(string icon) {
        if (icon != current_icon) {
            menu_button.set_icon_name(icon);
            current_icon = icon;
        }
    }

    private void update_encryption_menu_icon() {
        set_icon(conversation.encryption == Encryption.NONE ? "changes-allow-symbolic" : "changes-prevent-symbolic");
    }

    private void update_visibility() {
        if (conversation.encryption != Encryption.NONE) {
            menu_button.visible = true;
            return;
        }
        switch (conversation.type_) {
            case Conversation.Type.CHAT:
                menu_button.visible = true;
                break;
            case Conversation.Type.GROUPCHAT_PM:
                menu_button.visible = false;
                break;
            case Conversation.Type.GROUPCHAT:
                menu_button.visible = stream_interactor.get_module(MucManager.IDENTITY).is_private_room(conversation.account, conversation.counterpart);
                break;
        }
    }

    public void set_conversation(Conversation conversation) {
        this.conversation = conversation;
        update_encryption_menu_state();
        update_encryption_menu_icon();
        update_visibility();
    }
}

}