From cfb7fdb1a7b2db263502677e57ee882a6fe23f13 Mon Sep 17 00:00:00 2001
From: Tyler Schicke <tyler_schicke@brown.edu>
Date: Tue, 21 May 2019 12:29:28 -0400
Subject: Made cursors disappear after 1 second

---
 src/client/views/collections/CollectionSubView.tsx                  | 6 ++----
 .../collectionFreeForm/CollectionFreeFormRemoteCursors.tsx          | 5 ++++-
 2 files changed, 6 insertions(+), 5 deletions(-)

(limited to 'src/client/views/collections')

diff --git a/src/client/views/collections/CollectionSubView.tsx b/src/client/views/collections/CollectionSubView.tsx
index 864fdfa4b..7800b35df 100644
--- a/src/client/views/collections/CollectionSubView.tsx
+++ b/src/client/views/collections/CollectionSubView.tsx
@@ -16,9 +16,7 @@ import { listSpec } from "../../../new_fields/Schema";
 import { Cast, PromiseValue, FieldValue, ListSpec } from "../../../new_fields/Types";
 import { List } from "../../../new_fields/List";
 import { DocServer } from "../../DocServer";
-import { ObjectField } from "../../../new_fields/ObjectField";
-import CursorField, { CursorPosition, CursorMetadata } from "../../../new_fields/CursorField";
-import { url } from "inspector";
+import CursorField from "../../../new_fields/CursorField";
 
 export interface CollectionViewProps extends FieldViewProps {
     addDocument: (document: Doc, allowDuplicates?: boolean) => boolean;
@@ -72,7 +70,7 @@ export function CollectionSubView<T>(schemaCtor: (doc: Doc) => T) {
                 if (cursors.length > 0 && (ind = cursors.findIndex(entry => entry.data.metadata.id === id)) > -1) {
                     cursors[ind].setPosition(pos);
                 } else {
-                    let entry = new CursorField({ metadata: { id: id, identifier: email }, position: pos });
+                    let entry = new CursorField({ metadata: { id: id, identifier: email, timestamp: Date.now() }, position: pos });
                     cursors.push(entry);
                 }
             }
diff --git a/src/client/views/collections/collectionFreeForm/CollectionFreeFormRemoteCursors.tsx b/src/client/views/collections/collectionFreeForm/CollectionFreeFormRemoteCursors.tsx
index 642118d75..2838b7905 100644
--- a/src/client/views/collections/collectionFreeForm/CollectionFreeFormRemoteCursors.tsx
+++ b/src/client/views/collections/collectionFreeForm/CollectionFreeFormRemoteCursors.tsx
@@ -9,6 +9,7 @@ import CursorField from "../../../../new_fields/CursorField";
 import { List } from "../../../../new_fields/List";
 import { Cast } from "../../../../new_fields/Types";
 import { listSpec } from "../../../../new_fields/Schema";
+import * as mobxUtils from 'mobx-utils';
 
 @observer
 export class CollectionFreeFormRemoteCursors extends React.Component<CollectionViewProps> {
@@ -23,7 +24,9 @@ export class CollectionFreeFormRemoteCursors extends React.Component<CollectionV
 
         let cursors = Cast(doc.cursors, listSpec(CursorField));
 
-        return (cursors || []).filter(cursor => cursor.data.metadata.id !== id);
+        const now = mobxUtils.now();
+        // const now = Date.now();
+        return (cursors || []).filter(cursor => cursor.data.metadata.id !== id && (now - cursor.data.metadata.timestamp) < 1000);
     }
 
     private crosshairs?: HTMLCanvasElement;
-- 
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