Events

Plugins react to editor activity through IEventBus. Events are plain structs defined in PluginEvents.h:

Event	Payload
DocumentOpened	DocumentId, std::filesystem::path
DocumentClosed	DocumentId
DocumentSaved	DocumentId
TextChanged	DocumentId, pos, addedBytes, removedBytes
SelectionChanged	DocumentId
ActiveDocumentChanged	DocumentId
AppAboutToQuit	(none)

Subscribing

subscribe is a template that returns a Subscription (RAII). Keep the subscription alive as a member for as long as you want the callback to fire; destroying it unsubscribes.

m_sub = ctx.events().subscribe<MTE::plugin::DocumentSaved>(
    [this](const MTE::plugin::DocumentSaved& e) {
        // react to e.id ...
    });

class IEventBus {
public:
    template <class Event>
    Subscription subscribe(std::function<void(const Event&)> cb);
    // Forwards to a type-erased subscribeRaw(std::type_index, ...) internally.
};

Tip

Hold every Subscription as a plugin member so all callbacks are torn down automatically in shutdown().