1 files changed, 66 insertions, 0 deletions
diff --git a/src/fields/CursorField.ts b/src/fields/CursorField.ts
new file mode 100644
index 000000000..28467377b
--- /dev/null
+++ b/src/fields/CursorField.ts
@@ -0,0 +1,66 @@
+import { ObjectField } from "./ObjectField";
+import { observable } from "mobx";
+import { Deserializable } from "../client/util/SerializationHelper";
+import { serializable, createSimpleSchema, object, date } from "serializr";
+import { OnUpdate, ToScriptString, ToString, Copy } from "./FieldSymbols";
+
+export type CursorPosition = {
+    x: number,
+    y: number
+};
+
+export type CursorMetadata = {
+    id: string,
+    identifier: string,
+    timestamp: number
+};
+
+export type CursorData = {
+    metadata: CursorMetadata,
+    position: CursorPosition
+};
+
+const PositionSchema = createSimpleSchema({
+    x: true,
+    y: true
+});
+
+const MetadataSchema = createSimpleSchema({
+    id: true,
+    identifier: true,
+    timestamp: true
+});
+
+const CursorSchema = createSimpleSchema({
+    metadata: object(MetadataSchema),
+    position: object(PositionSchema)
+});
+
+@Deserializable("cursor")
+export default class CursorField extends ObjectField {
+
+    @serializable(object(CursorSchema))
+    readonly data: CursorData;
+
+    constructor(data: CursorData) {
+        super();
+        this.data = data;
+    }
+
+    setPosition(position: CursorPosition) {
+        this.data.position = position;
+        this.data.metadata.timestamp = Date.now();
+        this[OnUpdate]();
+    }
+
+    [Copy]() {
+        return new CursorField(this.data);
+    }
+
+    [ToScriptString]() {
+        return "invalid";
+    }
+    [ToString]() {
+        return "invalid";
+    }
+}
+\ No newline at end of file