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Use fetchMore for native lazy loading of item model data

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This commit is contained in:
Nicolas Werner 2020-01-06 16:42:56 +01:00
parent 946ab4d0f2
commit 5af6f6528b
3 changed files with 48 additions and 37 deletions
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75
src/timeline/TimelineModel.cpp
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@ -349,6 +349,50 @@ TimelineModel::data(const QModelIndex &index, int role) const
}
}
bool
TimelineModel::canFetchMore(const QModelIndex &) const
{
if (eventOrder.empty())
return true;
if (!std::holds_alternative<mtx::events::StateEvent<mtx::events::state::Create>>(
events[eventOrder.back()]))
return true;
else
return false;
}
void
TimelineModel::fetchMore(const QModelIndex &)
{
if (paginationInProgress) {
nhlog::ui()->warn("Already loading older messages");
return;
}
paginationInProgress = true;
mtx::http::MessagesOpts opts;
opts.room_id = room_id_.toStdString();
opts.from = prev_batch_token_.toStdString();
nhlog::ui()->debug("Paginationg room {}", opts.room_id);
http::client()->messages(
opts, [this, opts](const mtx::responses::Messages &res, mtx::http::RequestErr err) {
if (err) {
nhlog::net()->error("failed to call /messages ({}): {} - {}",
opts.room_id,
mtx::errors::to_string(err->matrix_error.errcode),
err->matrix_error.error);
paginationInProgress = false;
return;
}
emit oldMessagesRetrieved(std::move(res));
paginationInProgress = false;
});
}
void
TimelineModel::addEvents(const mtx::responses::Timeline &timeline)
{
@ -465,37 +509,6 @@ TimelineModel::internalAddEvents(
return ids;
}
void
TimelineModel::fetchHistory()
{
if (paginationInProgress) {
nhlog::ui()->warn("Already loading older messages");
return;
}
paginationInProgress = true;
mtx::http::MessagesOpts opts;
opts.room_id = room_id_.toStdString();
opts.from = prev_batch_token_.toStdString();
nhlog::ui()->info("Paginationg room {}", opts.room_id);
http::client()->messages(
opts, [this, opts](const mtx::responses::Messages &res, mtx::http::RequestErr err) {
if (err) {
nhlog::net()->error("failed to call /messages ({}): {} - {}",
opts.room_id,
mtx::errors::to_string(err->matrix_error.errcode),
err->matrix_error.error);
paginationInProgress = false;
return;
}
emit oldMessagesRetrieved(std::move(res));
paginationInProgress = false;
});
}
void
TimelineModel::setCurrentIndex(int index)
{