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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
syntax = "proto3";
package feedui;
option optimize_for = LITE_RUNTIME;
option java_package = "org.chromium.components.feed.proto";
option java_outer_classname = "FeedUiProto";
// This is a simplified and complete set of protos that define UI.
// It includes everything from search.now.ui needed in the UI, and excludes
// other data to reduce complexity. These proto messages should be constructible
// from the store protos.
// A stream is a list of chunks in order.
// Each StreamUpdate contains the full list of chunks,
// but subsequent StreamUpdates after the first may refer to
// chunks previously received by chunk_id.
message StreamUpdate {
// Either a reference to an existing slice, or a new slice.
message SliceUpdate {
oneof update {
Slice slice = 1;
string slice_id = 2;
}
}
// One entry for each slice in the stream, in the order they should be
// presented. Existing slices not present in updated_slices should be dropped.
repeated SliceUpdate updated_slices = 1;
// Additional shared states to be used. Usually just one, and sent only on the
// first update.
repeated SharedState new_shared_states = 2;
// Time of the last full server fetch. Populated only after the stream data is
// loaded. Not updated on NextPage requests.
int64 fetch_time_ms = 3;
// Logging parameters to be associated with updated_slices.
LoggingParameters logging_parameters = 4;
}
message LoggingParameters {
// Either email or session_id should be set to enable activity logging.
// The session ID is for signed out users.
string session_id = 1;
string email = 2;
// A client ID used for reliability logging.
string client_instance_id = 3;
// Whether attention / interaction logging is enabled.
bool logging_enabled = 4;
// Whether view actions may be recorded.
bool view_actions_enabled = 5;
// The EventID of the first page response. Must be present for attention
// logging.
bytes root_event_id = 6;
}
// A horizontal slice of UI to be presented in the vertical-scrolling feed.
message Slice {
// Deprecated slice metadata
reserved 5;
oneof SliceData {
XSurfaceSlice xsurface_slice = 1;
ZeroStateSlice zero_state_slice = 3;
LoadingSpinnerSlice loading_spinner_slice = 4;
}
string slice_id = 2;
}
// This slice is sent when no feed data can be loaded.
message ZeroStateSlice {
enum Type {
UNKNOWN = 0;
// A generic error that explains there are no cards available.
NO_CARDS_AVAILABLE = 1;
// An error indicating there were problems refreshing the feed.
CANT_REFRESH = 2;
// There is no content because there are no web feed subscriptions.
NO_WEB_FEED_SUBSCRIPTIONS = 3;
};
Type type = 1;
}
// An indicator that the feed is loading.
message LoadingSpinnerSlice {
// True if the spinner is at the top of the feed. Otherwise, it is at the
// bottom.
bool is_at_top = 1;
}
message XSurfaceSlice {
bytes xsurface_frame = 1;
}
// Wraps an XSurface shared state with a unique ID.
message SharedState {
string id = 1;
bytes xsurface_shared_state = 2;
}
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