bool onProcessMessage(ui::Message* msg) override {
switch (msg->type()) {
case ui::kOpenMessage:
load_window_pos(this, "UndoHistory");
m_ctx->addObserver(this);
m_ctx->documents().addObserver(this);
if (m_ctx->activeDocument()) {
m_frame = m_ctx->activeSite().frame();
attachDocument(
static_cast<app::Document*>(m_ctx->activeDocument()));
}
break;
case ui::kCloseMessage:
save_window_pos(this, "UndoHistory");
if (m_document)
detachDocument();
m_ctx->documents().removeObserver(this);
m_ctx->removeObserver(this);
break;
}
return app::gen::UndoHistory::onProcessMessage(msg);
}
// ContextObserver
void onActiveSiteChange(const doc::Site& site) override {
if (m_document == site.document())
return;
attachDocument(
static_cast<app::Document*>(
const_cast<doc::Document*>(site.document())));
}