renamed new_fields to fields

22 files changed, 3283 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
diff --git a/src/fields/DateField.ts b/src/fields/DateField.ts
new file mode 100644
index 000000000..a925148c2
--- /dev/null
+++ b/src/fields/DateField.ts
@@ -0,0 +1,36 @@
+import { Deserializable } from "../client/util/SerializationHelper";
+import { serializable, date } from "serializr";
+import { ObjectField } from "./ObjectField";
+import { Copy, ToScriptString, ToString } from "./FieldSymbols";
+import { scriptingGlobal, Scripting } from "../client/util/Scripting";
+
+@scriptingGlobal
+@Deserializable("date")
+export class DateField extends ObjectField {
+    @serializable(date())
+    readonly date: Date;
+
+    constructor(date: Date = new Date()) {
+        super();
+        this.date = date;
+    }
+
+    [Copy]() {
+        return new DateField(this.date);
+    }
+
+    toString() {
+        return `${this.date.toISOString()}`;
+    }
+
+    [ToScriptString]() {
+        return `new DateField(new Date(${this.date.toISOString()}))`;
+    }
+    [ToString]() {
+        return this.date.toISOString();
+    }
+}
+
+Scripting.addGlobal(function d(...dateArgs: any[]) {
+    return new DateField(new (Date as any)(...dateArgs));
+});
diff --git a/src/fields/Doc.ts b/src/fields/Doc.ts
new file mode 100644
index 000000000..a1e1e11b1
--- /dev/null
+++ b/src/fields/Doc.ts
@@ -0,0 +1,1109 @@
+import { action, computed, observable, ObservableMap, runInAction } from "mobx";
+import { computedFn } from "mobx-utils";
+import { alias, map, serializable } from "serializr";
+import { DocServer } from "../client/DocServer";
+import { DocumentType } from "../client/documents/DocumentTypes";
+import { Scripting, scriptingGlobal } from "../client/util/Scripting";
+import { afterDocDeserialize, autoObject, Deserializable, SerializationHelper } from "../client/util/SerializationHelper";
+import { UndoManager } from "../client/util/UndoManager";
+import { intersectRect, Utils } from "../Utils";
+import { HandleUpdate, Id, OnUpdate, Parent, Self, SelfProxy, ToScriptString, ToString, Update, Copy } from "./FieldSymbols";
+import { List } from "./List";
+import { ObjectField } from "./ObjectField";
+import { PrefetchProxy, ProxyField } from "./Proxy";
+import { FieldId, RefField } from "./RefField";
+import { RichTextField } from "./RichTextField";
+import { listSpec } from "./Schema";
+import { ComputedField, ScriptField } from "./ScriptField";
+import { Cast, FieldValue, NumCast, StrCast, ToConstructor, ScriptCast } from "./Types";
+import { deleteProperty, getField, getter, makeEditable, makeReadOnly, setter, updateFunction } from "./util";
+import { Docs, DocumentOptions } from "../client/documents/Documents";
+import { PdfField, VideoField, AudioField, ImageField } from "./URLField";
+import { LinkManager } from "../client/util/LinkManager";
+
+export namespace Field {
+    export function toKeyValueString(doc: Doc, key: string): string {
+        const onDelegate = Object.keys(doc).includes(key);
+
+        const field = ComputedField.WithoutComputed(() => FieldValue(doc[key]));
+        if (Field.IsField(field)) {
+            return (onDelegate ? "=" : "") + (field instanceof ComputedField ? `:=${field.script.originalScript}` : Field.toScriptString(field));
+        }
+        return "";
+    }
+    export function toScriptString(field: Field): string {
+        if (typeof field === "string") {
+            return `"${field}"`;
+        } else if (typeof field === "number" || typeof field === "boolean") {
+            return String(field);
+        } else {
+            return field[ToScriptString]();
+        }
+    }
+    export function toString(field: Field): string {
+        if (typeof field === "string") {
+            return field;
+        } else if (typeof field === "number" || typeof field === "boolean") {
+            return String(field);
+        } else if (field instanceof ObjectField) {
+            return field[ToString]();
+        } else if (field instanceof RefField) {
+            return field[ToString]();
+        }
+        return "";
+    }
+    export function IsField(field: any): field is Field;
+    export function IsField(field: any, includeUndefined: true): field is Field | undefined;
+    export function IsField(field: any, includeUndefined: boolean = false): field is Field | undefined {
+        return (typeof field === "string")
+            || (typeof field === "number")
+            || (typeof field === "boolean")
+            || (field instanceof ObjectField)
+            || (field instanceof RefField)
+            || (includeUndefined && field === undefined);
+    }
+}
+export type Field = number | string | boolean | ObjectField | RefField;
+export type Opt<T> = T | undefined;
+export type FieldWaiting<T extends RefField = RefField> = T extends undefined ? never : Promise<T | undefined>;
+export type FieldResult<T extends Field = Field> = Opt<T> | FieldWaiting<Extract<T, RefField>>;
+
+/**
+ * Cast any field to either a List of Docs or undefined if the given field isn't a List of Docs.  
+ * If a default value is given, that will be returned instead of undefined.  
+ * If a default value is given, the returned value should not be modified as it might be a temporary value.  
+ * If no default value is given, and the returned value is not undefined, it can be safely modified.  
+ */
+export function DocListCastAsync(field: FieldResult): Promise<Doc[] | undefined>;
+export function DocListCastAsync(field: FieldResult, defaultValue: Doc[]): Promise<Doc[]>;
+export function DocListCastAsync(field: FieldResult, defaultValue?: Doc[]) {
+    const list = Cast(field, listSpec(Doc));
+    return list ? Promise.all(list).then(() => list) : Promise.resolve(defaultValue);
+}
+
+export async function DocCastAsync(field: FieldResult): Promise<Opt<Doc>> {
+    return Cast(field, Doc);
+}
+
+export function DocListCast(field: FieldResult): Doc[] {
+    return Cast(field, listSpec(Doc), []).filter(d => d instanceof Doc) as Doc[];
+}
+
+export const WidthSym = Symbol("Width");
+export const HeightSym = Symbol("Height");
+export const DataSym = Symbol("Data");
+export const LayoutSym = Symbol("Layout");
+export const UpdatingFromServer = Symbol("UpdatingFromServer");
+const CachedUpdates = Symbol("Cached updates");
+
+
+function fetchProto(doc: Doc) {
+    const proto = doc.proto;
+    if (proto instanceof Promise) {
+        return proto;
+    }
+}
+
+@scriptingGlobal
+@Deserializable("Doc", fetchProto).withFields(["id"])
+export class Doc extends RefField {
+    constructor(id?: FieldId, forceSave?: boolean) {
+        super(id);
+        const doc = new Proxy<this>(this, {
+            set: setter,
+            get: getter,
+            // getPrototypeOf: (target) => Cast(target[SelfProxy].proto, Doc) || null, // TODO this might be able to replace the proto logic in getter
+            has: (target, key) => key in target.__fields,
+            ownKeys: target => {
+                const obj = {} as any;
+                Object.assign(obj, target.___fields);
+                runInAction(() => obj.__LAYOUT__ = target.__LAYOUT__);
+                return Object.keys(obj);
+            },
+            getOwnPropertyDescriptor: (target, prop) => {
+                if (prop.toString() === "__LAYOUT__") {
+                    return Reflect.getOwnPropertyDescriptor(target, prop);
+                }
+                if (prop in target.__fields) {
+                    return {
+                        configurable: true,//TODO Should configurable be true?
+                        enumerable: true,
+                        value: target.__fields[prop]
+                    };
+                }
+                return Reflect.getOwnPropertyDescriptor(target, prop);
+            },
+            deleteProperty: deleteProperty,
+            defineProperty: () => { throw new Error("Currently properties can't be defined on documents using Object.defineProperty"); },
+        });
+        this[SelfProxy] = doc;
+        if (!id || forceSave) {
+            DocServer.CreateField(doc);
+        }
+        return doc;
+    }
+
+    proto: Opt<Doc>;
+    [key: string]: FieldResult;
+
+    @serializable(alias("fields", map(autoObject(), { afterDeserialize: afterDocDeserialize })))
+    private get __fields() { return this.___fields; }
+    private set __fields(value) {
+        this.___fields = value;
+        for (const key in value) {
+            const field = value[key];
+            if (!(field instanceof ObjectField)) continue;
+            field[Parent] = this[Self];
+            field[OnUpdate] = updateFunction(this[Self], key, field, this[SelfProxy]);
+        }
+    }
+
+    @observable
+    //{ [key: string]: Field | FieldWaiting | undefined }
+    private ___fields: any = {};
+
+    private [UpdatingFromServer]: boolean = false;
+
+    private [Update] = (diff: any) => {
+        !this[UpdatingFromServer] && DocServer.UpdateField(this[Id], diff);
+    }
+
+    private [Self] = this;
+    private [SelfProxy]: any;
+    public [WidthSym] = () => NumCast(this[SelfProxy]._width);
+    public [HeightSym] = () => NumCast(this[SelfProxy]._height);
+    public get [LayoutSym]() { return this[SelfProxy].__LAYOUT__; }
+    public get [DataSym]() {
+        const self = this[SelfProxy];
+        return self.resolvedDataDoc && !self.isTemplateForField ? self :
+            Doc.GetProto(Cast(Doc.Layout(self).resolvedDataDoc, Doc, null) || self);
+    }
+    @computed get __LAYOUT__() {
+        const templateLayoutDoc = Cast(Doc.LayoutField(this[SelfProxy]), Doc, null);
+        if (templateLayoutDoc) {
+            let renderFieldKey: any;
+            const layoutField = templateLayoutDoc[StrCast(templateLayoutDoc.layoutKey, "layout")];
+            if (typeof layoutField === "string") {
+                renderFieldKey = layoutField.split("fieldKey={'")[1].split("'")[0];//layoutField.split("'")[1];
+            } else {
+                return Cast(layoutField, Doc, null);
+            }
+            return Cast(this[SelfProxy][renderFieldKey + "-layout[" + templateLayoutDoc[Id] + "]"], Doc, null) || templateLayoutDoc;
+        }
+        return undefined;
+    }
+
+    [ToScriptString]() { return `DOC-"${this[Self][Id]}"-`; }
+    [ToString]() { return `Doc(${this.title})`; }
+
+    private [CachedUpdates]: { [key: string]: () => void | Promise<any> } = {};
+    public static CurrentUserEmail: string = "";
+    public async [HandleUpdate](diff: any) {
+        const set = diff.$set;
+        const sameAuthor = this.author === Doc.CurrentUserEmail;
+        if (set) {
+            for (const key in set) {
+                if (!key.startsWith("fields.")) {
+                    continue;
+                }
+                const fKey = key.substring(7);
+                const fn = async () => {
+                    const value = await SerializationHelper.Deserialize(set[key]);
+                    this[UpdatingFromServer] = true;
+                    this[fKey] = value;
+                    this[UpdatingFromServer] = false;
+                };
+                if (sameAuthor || DocServer.getFieldWriteMode(fKey) !== DocServer.WriteMode.Playground) {
+                    delete this[CachedUpdates][fKey];
+                    await fn();
+                } else {
+                    this[CachedUpdates][fKey] = fn;
+                }
+            }
+        }
+        const unset = diff.$unset;
+        if (unset) {
+            for (const key in unset) {
+                if (!key.startsWith("fields.")) {
+                    continue;
+                }
+                const fKey = key.substring(7);
+                const fn = () => {
+                    this[UpdatingFromServer] = true;
+                    delete this[fKey];
+                    this[UpdatingFromServer] = false;
+                };
+                if (sameAuthor || DocServer.getFieldWriteMode(fKey) !== DocServer.WriteMode.Playground) {
+                    delete this[CachedUpdates][fKey];
+                    await fn();
+                } else {
+                    this[CachedUpdates][fKey] = fn;
+                }
+            }
+        }
+    }
+}
+
+export namespace Doc {
+    // export function GetAsync(doc: Doc, key: string, ignoreProto: boolean = false): Promise<Field | undefined> {
+    //     const self = doc[Self];
+    //     return new Promise(res => getField(self, key, ignoreProto, res));
+    // }
+    // export function GetTAsync<T extends Field>(doc: Doc, key: string, ctor: ToConstructor<T>, ignoreProto: boolean = false): Promise<T | undefined> {
+    //     return new Promise(async res => {
+    //         const field = await GetAsync(doc, key, ignoreProto);
+    //         return Cast(field, ctor);
+    //     });
+    // }
+
+    export function RunCachedUpdate(doc: Doc, field: string) {
+        const update = doc[CachedUpdates][field];
+        if (update) {
+            update();
+            delete doc[CachedUpdates][field];
+        }
+    }
+    export function AddCachedUpdate(doc: Doc, field: string, oldValue: any) {
+        const val = oldValue;
+        doc[CachedUpdates][field] = () => {
+            doc[UpdatingFromServer] = true;
+            doc[field] = val;
+            doc[UpdatingFromServer] = false;
+        };
+    }
+    export function MakeReadOnly(): { end(): void } {
+        makeReadOnly();
+        return {
+            end() {
+                makeEditable();
+            }
+        };
+    }
+
+    export function Get(doc: Doc, key: string, ignoreProto: boolean = false): FieldResult {
+        try {
+            return getField(doc[Self], key, ignoreProto);
+        } catch  {
+            return doc;
+        }
+    }
+    export function GetT<T extends Field>(doc: Doc, key: string, ctor: ToConstructor<T>, ignoreProto: boolean = false): FieldResult<T> {
+        return Cast(Get(doc, key, ignoreProto), ctor) as FieldResult<T>;
+    }
+    export function IsPrototype(doc: Doc) {
+        return GetT(doc, "isPrototype", "boolean", true);
+    }
+    export function IsBaseProto(doc: Doc) {
+        return GetT(doc, "baseProto", "boolean", true);
+    }
+    export async function SetInPlace(doc: Doc, key: string, value: Field | undefined, defaultProto: boolean) {
+        const hasProto = doc.proto instanceof Doc;
+        const onDeleg = Object.getOwnPropertyNames(doc).indexOf(key) !== -1;
+        const onProto = hasProto && Object.getOwnPropertyNames(doc.proto).indexOf(key) !== -1;
+        if (onDeleg || !hasProto || (!onProto && !defaultProto)) {
+            doc[key] = value;
+        } else doc.proto![key] = value;
+    }
+    export async function SetOnPrototype(doc: Doc, key: string, value: Field) {
+        const proto = Object.getOwnPropertyNames(doc).indexOf("isPrototype") === -1 ? doc.proto : doc;
+
+        if (proto) {
+            proto[key] = value;
+        }
+    }
+    export function GetAllPrototypes(doc: Doc): Doc[] {
+        const protos: Doc[] = [];
+        let d: Opt<Doc> = doc;
+        while (d) {
+            protos.push(d);
+            d = FieldValue(d.proto);
+        }
+        return protos;
+    }
+
+    /**
+     * This function is intended to model Object.assign({}, {}) [https://mzl.la/1Mo3l21], which copies
+     * the values of the properties of a source object into the target.
+     * 
+     * This is just a specific, Dash-authored version that serves the same role for our
+     * Doc class.
+     * 
+     * @param doc the target document into which you'd like to insert the new fields 
+     * @param fields the fields to project onto the target. Its type signature defines a mapping from some string key
+     * to a potentially undefined field, where each entry in this mapping is optional. 
+     */
+    export function assign<K extends string>(doc: Doc, fields: Partial<Record<K, Opt<Field>>>, skipUndefineds: boolean = false) {
+        for (const key in fields) {
+            if (fields.hasOwnProperty(key)) {
+                const value = fields[key];
+                if (!skipUndefineds || value !== undefined) { // Do we want to filter out undefineds?
+                    doc[key] = value;
+                }
+            }
+        }
+        return doc;
+    }
+
+    // compare whether documents or their protos match
+    export function AreProtosEqual(doc?: Doc, other?: Doc) {
+        if (!doc || !other) return false;
+        const r = (doc === other);
+        const r2 = (Doc.GetProto(doc) === other);
+        const r3 = (Doc.GetProto(other) === doc);
+        const r4 = (Doc.GetProto(doc) === Doc.GetProto(other) && Doc.GetProto(other) !== undefined);
+        return r || r2 || r3 || r4;
+    }
+
+    // Gets the data document for the document.  Note: this is mis-named -- it does not specifically
+    // return the doc's proto, but rather recursively searches through the proto inheritance chain 
+    // and returns the document who's proto is undefined or whose proto is marked as a base prototype ('isPrototype').
+    export function GetProto(doc: Doc): Doc {
+        if (doc instanceof Promise) {
+            console.log("GetProto: error: got Promise insead of Doc");
+        }
+        const proto = doc && (Doc.GetT(doc, "isPrototype", "boolean", true) ? doc : (doc.proto || doc));
+        return proto === doc ? proto : Doc.GetProto(proto);
+    }
+    export function GetDataDoc(doc: Doc): Doc {
+        const proto = Doc.GetProto(doc);
+        return proto === doc ? proto : Doc.GetDataDoc(proto);
+    }
+
+    export function allKeys(doc: Doc): string[] {
+        const results: Set<string> = new Set;
+
+        let proto: Doc | undefined = doc;
+        while (proto) {
+            Object.keys(proto).forEach(key => results.add(key));
+            proto = proto.proto;
+        }
+
+        return Array.from(results);
+    }
+
+    export function IndexOf(toFind: Doc, list: Doc[], allowProtos: boolean = true) {
+        let index = list.reduce((p, v, i) => (v instanceof Doc && v === toFind) ? i : p, -1);
+        index = allowProtos && index !== -1 ? index : list.reduce((p, v, i) => (v instanceof Doc && Doc.AreProtosEqual(v, toFind)) ? i : p, -1);
+        return index; // list.findIndex(doc => doc === toFind || Doc.AreProtosEqual(doc, toFind));
+    }
+    export function RemoveDocFromList(listDoc: Doc, fieldKey: string | undefined, doc: Doc) {
+        const key = fieldKey ? fieldKey : Doc.LayoutFieldKey(listDoc);
+        if (listDoc[key] === undefined) {
+            Doc.GetProto(listDoc)[key] = new List<Doc>();
+        }
+        const list = Cast(listDoc[key], listSpec(Doc));
+        if (list) {
+            const ind = list.indexOf(doc);
+            if (ind !== -1) {
+                list.splice(ind, 1);
+                return true;
+            }
+        }
+        return false;
+    }
+    export function AddDocToList(listDoc: Doc, fieldKey: string | undefined, doc: Doc, relativeTo?: Doc, before?: boolean, first?: boolean, allowDuplicates?: boolean, reversed?: boolean) {
+        const key = fieldKey ? fieldKey : Doc.LayoutFieldKey(listDoc);
+        if (listDoc[key] === undefined) {
+            Doc.GetProto(listDoc)[key] = new List<Doc>();
+        }
+        const list = Cast(listDoc[key], listSpec(Doc));
+        if (list) {
+            if (allowDuplicates !== true) {
+                const pind = list.reduce((l, d, i) => d instanceof Doc && d[Id] === doc[Id] ? i : l, -1);
+                if (pind !== -1) {
+                    list.splice(pind, 1);
+                }
+            }
+            if (first) {
+                list.splice(0, 0, doc);
+            }
+            else {
+                const ind = relativeTo ? list.indexOf(relativeTo) : -1;
+                if (ind === -1) {
+                    if (reversed) list.splice(0, 0, doc);
+                    else list.push(doc);
+                }
+                else {
+                    if (reversed) list.splice(before ? (list.length - ind) + 1 : list.length - ind, 0, doc);
+                    else list.splice(before ? ind : ind + 1, 0, doc);
+                }
+            }
+            return true;
+        }
+        return false;
+    }
+
+    //
+    // Computes the bounds of the contents of a set of documents.
+    //
+    export function ComputeContentBounds(docList: Doc[]) {
+        const bounds = docList.reduce((bounds, doc) => {
+            const [sptX, sptY] = [NumCast(doc.x), NumCast(doc.y)];
+            const [bptX, bptY] = [sptX + doc[WidthSym](), sptY + doc[HeightSym]()];
+            return {
+                x: Math.min(sptX, bounds.x), y: Math.min(sptY, bounds.y),
+                r: Math.max(bptX, bounds.r), b: Math.max(bptY, bounds.b)
+            };
+        }, { x: Number.MAX_VALUE, y: Number.MAX_VALUE, r: -Number.MAX_VALUE, b: -Number.MAX_VALUE });
+        return bounds;
+    }
+
+    export function MakeAlias(doc: Doc, id?: string) {
+        const alias = !GetT(doc, "isPrototype", "boolean", true) ? Doc.MakeCopy(doc, undefined, id) : Doc.MakeDelegate(doc, id);
+        const layout = Doc.LayoutField(alias);
+        if (layout instanceof Doc && layout !== alias && layout === Doc.Layout(alias)) {
+            Doc.SetLayout(alias, Doc.MakeAlias(layout));
+        }
+        alias.aliasOf = doc;
+        alias.title = ComputedField.MakeFunction(`renameAlias(this, ${Doc.GetProto(doc).aliasNumber = NumCast(Doc.GetProto(doc).aliasNumber) + 1})`);
+        return alias;
+    }
+
+    //
+    // Determines whether the layout needs to be expanded (as a template).
+    // template expansion is rquired when the layout is a template doc/field and there's a datadoc which isn't equal to the layout template
+    //
+    export function WillExpandTemplateLayout(layoutDoc: Doc, dataDoc?: Doc) {
+        return (layoutDoc.isTemplateForField || layoutDoc.isTemplateDoc) && dataDoc && layoutDoc !== dataDoc;
+    }
+
+    const _pendingMap: Map<string, boolean> = new Map();
+    //
+    // Returns an expanded template layout for a target data document if there is a template relationship
+    // between the two. If so, the layoutDoc is expanded into a new document that inherits the properties 
+    // of the original layout while allowing for individual layout properties to be overridden in the expanded layout.
+    // templateArgs should be equivalent to the layout key that generates the template since that's where the template parameters are stored in ()'s at the end of the key.
+    // NOTE:  the template will have references to "@params" -- the template arguments will be assigned to the '@params' field
+    // so that when the @params key is accessed, it will be rewritten as the key that is stored in the 'params' field and
+    // the derefence will then occur on the rootDocument (the original document).
+    // in the future, field references could be written as @<someparam> and then arguments would be passed in the layout key as:
+    //   layout_mytemplate(somparam=somearg).   
+    // then any references to @someparam would be rewritten as accesses to 'somearg' on the rootDocument
+    export function expandTemplateLayout(templateLayoutDoc: Doc, targetDoc?: Doc, templateArgs?: string) {
+        const args = templateArgs?.match(/\(([a-zA-Z0-9._\-]*)\)/)?.[1].replace("()", "") || StrCast(templateLayoutDoc.PARAMS);
+        if (!args && !WillExpandTemplateLayout(templateLayoutDoc, targetDoc) || !targetDoc) return templateLayoutDoc;
+
+        const templateField = StrCast(templateLayoutDoc.isTemplateForField);  // the field that the template renders
+        // First it checks if an expanded layout already exists -- if so it will be stored on the dataDoc
+        // using the template layout doc's id as the field key.
+        // If it doesn't find the expanded layout, then it makes a delegate of the template layout and
+        // saves it on the data doc indexed by the template layout's id.
+        //
+        const params = args.split("=").length > 1 ? args.split("=")[0] : "PARAMS";
+        const layoutFielddKey = Doc.LayoutFieldKey(templateLayoutDoc);
+        const expandedLayoutFieldKey = (templateField || layoutFielddKey) + "-layout[" + templateLayoutDoc[Id] + (args ? `(${args})` : "") + "]";
+        let expandedTemplateLayout = targetDoc?.[expandedLayoutFieldKey];
+
+        if (templateLayoutDoc.resolvedDataDoc instanceof Promise) {
+            expandedTemplateLayout = undefined;
+            _pendingMap.set(targetDoc[Id] + expandedLayoutFieldKey, true);
+        }
+        else if (expandedTemplateLayout === undefined && !_pendingMap.get(targetDoc[Id] + expandedLayoutFieldKey + args)) {
+            if (templateLayoutDoc.resolvedDataDoc === (targetDoc.rootDocument || Doc.GetProto(targetDoc)) && templateLayoutDoc.PARAMS === StrCast(targetDoc.PARAMS)) {
+                expandedTemplateLayout = templateLayoutDoc; // reuse an existing template layout if its for the same document with the same params
+            } else {
+                _pendingMap.set(targetDoc[Id] + expandedLayoutFieldKey + args, true);
+                templateLayoutDoc.resolvedDataDoc && (templateLayoutDoc = Cast(templateLayoutDoc.proto, Doc, null) || templateLayoutDoc); // if the template has already been applied (ie, a nested template), then use the template's prototype
+                setTimeout(action(() => {
+                    if (!targetDoc[expandedLayoutFieldKey]) {
+                        const newLayoutDoc = Doc.MakeDelegate(templateLayoutDoc, undefined, "[" + templateLayoutDoc.title + "]");
+                        // the template's arguments are stored in params which is derefenced to find
+                        // the actual field key where the parameterized template data is stored.
+                        newLayoutDoc[params] = args !== "..." ? args : ""; // ... signifies the layout has sub template(s) -- so we have to expand the layout for them so that they can get the correct 'rootDocument' field, but we don't need to reassign their params.  it would be better if the 'rootDocument' field could be passed dynamically to avoid have to create instances
+                        newLayoutDoc.rootDocument = targetDoc;
+                        targetDoc[expandedLayoutFieldKey] = newLayoutDoc;
+                        const dataDoc = Doc.GetProto(targetDoc);
+                        newLayoutDoc.resolvedDataDoc = dataDoc;
+                        if (dataDoc[templateField] === undefined && templateLayoutDoc[templateField] instanceof List) {
+                            dataDoc[templateField] = ComputedField.MakeFunction(`ObjectField.MakeCopy(templateLayoutDoc["${templateField}"] as List)`, { templateLayoutDoc: Doc.name }, { templateLayoutDoc });
+                        }
+                        _pendingMap.delete(targetDoc[Id] + expandedLayoutFieldKey + args);
+                    }
+                }), 0);
+            }
+        }
+        return expandedTemplateLayout instanceof Doc ? expandedTemplateLayout : undefined; // layout is undefined if the expandedTemplateLayout is pending.
+    }
+
+    // if the childDoc is a template for a field, then this will return the expanded layout with its data doc.
+    // otherwise, it just returns the childDoc
+    export function GetLayoutDataDocPair(containerDoc: Doc, containerDataDoc: Opt<Doc>, childDoc: Doc) {
+        if (!childDoc || childDoc instanceof Promise || !Doc.GetProto(childDoc)) {
+            console.log("No, no, no!");
+            return { layout: childDoc, data: childDoc };
+        }
+        const resolvedDataDoc = (Doc.AreProtosEqual(containerDataDoc, containerDoc) || (!childDoc.isTemplateDoc && !childDoc.isTemplateForField && !childDoc.PARAMS) ? undefined : containerDataDoc);
+        return { layout: Doc.expandTemplateLayout(childDoc, resolvedDataDoc, "(" + StrCast(containerDoc.PARAMS) + ")"), data: resolvedDataDoc };
+    }
+
+    export function Overwrite(doc: Doc, overwrite: Doc, copyProto: boolean = false): Doc {
+        Object.keys(doc).forEach(key => {
+            const field = ProxyField.WithoutProxy(() => doc[key]);
+            if (key === "proto" && copyProto) {
+                if (doc.proto instanceof Doc && overwrite.proto instanceof Doc) {
+                    overwrite[key] = Doc.Overwrite(doc[key]!, overwrite.proto);
+                }
+            } else {
+                if (field instanceof RefField) {
+                    overwrite[key] = field;
+                } else if (field instanceof ObjectField) {
+                    overwrite[key] = ObjectField.MakeCopy(field);
+                } else if (field instanceof Promise) {
+                    debugger; //This shouldn't happend...
+                } else {
+                    overwrite[key] = field;
+                }
+            }
+        });
+
+        return overwrite;
+    }
+
+    export function MakeCopy(doc: Doc, copyProto: boolean = false, copyProtoId?: string): Doc {
+        const copy = new Doc(copyProtoId, true);
+        const exclude = Cast(doc.excludeFields, listSpec("string"), []);
+        Object.keys(doc).forEach(key => {
+            if (exclude.includes(key)) return;
+            const cfield = ComputedField.WithoutComputed(() => FieldValue(doc[key]));
+            const field = ProxyField.WithoutProxy(() => doc[key]);
+            if (key === "proto" && copyProto) {
+                if (doc[key] instanceof Doc) {
+                    copy[key] = Doc.MakeCopy(doc[key]!, false);
+                }
+            } else {
+                if (field instanceof RefField) {
+                    copy[key] = field;
+                } else if (cfield instanceof ComputedField) {
+                    copy[key] = ComputedField.MakeFunction(cfield.script.originalScript);
+                } else if (field instanceof ObjectField) {
+                    copy[key] = doc[key] instanceof Doc ?
+                        key.includes("layout[") ? Doc.MakeCopy(doc[key] as Doc, false) : doc[key] : // reference documents except copy documents that are expanded teplate fields 
+                        ObjectField.MakeCopy(field);
+                } else if (field instanceof Promise) {
+                    debugger; //This shouldn't happend...
+                } else {
+                    copy[key] = field;
+                }
+            }
+        });
+
+        return copy;
+    }
+
+    export function MakeClone(doc: Doc): Doc {
+        const cloneMap = new Map<string, Doc>();
+        const rtfMap: { copy: Doc, key: string, field: RichTextField }[] = [];
+        const copy = Doc.makeClone(doc, cloneMap, rtfMap);
+        rtfMap.map(({ copy, key, field }) => {
+            const replacer = (match: any, attr: string, id: string, offset: any, string: any) => {
+                const mapped = cloneMap.get(id);
+                return attr + "\"" + (mapped ? mapped[Id] : id) + "\"";
+            };
+            const replacer2 = (match: any, href: string, id: string, offset: any, string: any) => {
+                const mapped = cloneMap.get(id);
+                return href + (mapped ? mapped[Id] : id);
+            };
+            const regex = `(${Utils.prepend("/doc/")})([^"]*)`;
+            const re = new RegExp(regex, "g");
+            copy[key] = new RichTextField(field.Data.replace(/("docid":|"targetId":|"linkId":)"([^"]+)"/g, replacer).replace(re, replacer2), field.Text);
+        });
+        return copy;
+    }
+
+    export function makeClone(doc: Doc, cloneMap: Map<string, Doc>, rtfs: { copy: Doc, key: string, field: RichTextField }[]): Doc {
+        if (Doc.IsBaseProto(doc)) return doc;
+        if (cloneMap.get(doc[Id])) return cloneMap.get(doc[Id])!;
+        const copy = new Doc(undefined, true);
+        cloneMap.set(doc[Id], copy);
+        if (LinkManager.Instance.getAllLinks().includes(doc) && LinkManager.Instance.getAllLinks().indexOf(copy) === -1) LinkManager.Instance.addLink(copy);
+        const exclude = Cast(doc.excludeFields, listSpec("string"), []);
+        Object.keys(doc).forEach(key => {
+            if (exclude.includes(key)) return;
+            const cfield = ComputedField.WithoutComputed(() => FieldValue(doc[key]));
+            const field = ProxyField.WithoutProxy(() => doc[key]);
+            const copyObjectField = (field: ObjectField) => {
+                const list = Cast(doc[key], listSpec(Doc));
+                if (list !== undefined && !(list instanceof Promise)) {
+                    copy[key] = new List<Doc>(list.filter(d => d instanceof Doc).map(d => Doc.makeClone(d as Doc, cloneMap, rtfs)));
+                } else if (doc[key] instanceof Doc) {
+                    copy[key] = key.includes("layout[") ? undefined : Doc.makeClone(doc[key] as Doc, cloneMap, rtfs); // reference documents except copy documents that are expanded teplate fields 
+                } else {
+                    copy[key] = ObjectField.MakeCopy(field);
+                    if (field instanceof RichTextField) {
+                        if (field.Data.includes('"docid":') || field.Data.includes('"targetId":') || field.Data.includes('"linkId":')) {
+                            rtfs.push({ copy, key, field });
+                        }
+                    }
+                }
+            };
+            if (key === "proto") {
+                if (doc[key] instanceof Doc) {
+                    copy[key] = Doc.makeClone(doc[key]!, cloneMap, rtfs);
+                }
+            } else {
+                if (field instanceof RefField) {
+                    copy[key] = field;
+                } else if (cfield instanceof ComputedField) {
+                    copy[key] = ComputedField.MakeFunction(cfield.script.originalScript);
+                    (key === "links" && field instanceof ObjectField) && copyObjectField(field);
+                } else if (field instanceof ObjectField) {
+                    copyObjectField(field);
+                } else if (field instanceof Promise) {
+                    debugger; //This shouldn't happend...
+                } else {
+                    copy[key] = field;
+                }
+            }
+        });
+        Doc.SetInPlace(copy, "title", "CLONE: " + doc.title, true);
+        copy.cloneOf = doc;
+        cloneMap.set(doc[Id], copy);
+        return copy;
+    }
+
+    export function MakeDelegate(doc: Doc, id?: string, title?: string): Doc;
+    export function MakeDelegate(doc: Opt<Doc>, id?: string, title?: string): Opt<Doc>;
+    export function MakeDelegate(doc: Opt<Doc>, id?: string, title?: string): Opt<Doc> {
+        if (doc) {
+            const delegate = new Doc(id, true);
+            delegate.proto = doc;
+            title && (delegate.title = title);
+            return delegate;
+        }
+        return undefined;
+    }
+
+    let _applyCount: number = 0;
+    export function ApplyTemplate(templateDoc: Doc) {
+        if (templateDoc) {
+            const target = Doc.MakeDelegate(new Doc());
+            const targetKey = StrCast(templateDoc.layoutKey, "layout");
+            const applied = ApplyTemplateTo(templateDoc, target, targetKey, templateDoc.title + "(..." + _applyCount++ + ")");
+            target.layoutKey = targetKey;
+            applied && (Doc.GetProto(applied).type = templateDoc.type);
+            return applied;
+        }
+        return undefined;
+    }
+    export function ApplyTemplateTo(templateDoc: Doc, target: Doc, targetKey: string, titleTarget: string | undefined) {
+        if (!Doc.AreProtosEqual(target[targetKey] as Doc, templateDoc)) {
+            if (target.resolvedDataDoc) {
+                target[targetKey] = new PrefetchProxy(templateDoc);
+            } else {
+                titleTarget && (Doc.GetProto(target).title = titleTarget);
+                Doc.GetProto(target)[targetKey] = new PrefetchProxy(templateDoc);
+            }
+        }
+        return target;
+    }
+
+    //
+    //  This function converts a generic field layout display into a field layout that displays a specific
+    // metadata field indicated by the title of the template field (not the default field that it was rendering)
+    //
+    export function MakeMetadataFieldTemplate(templateField: Doc, templateDoc: Opt<Doc>): boolean {
+
+        // find the metadata field key that this template field doc will display (indicated by its title)
+        const metadataFieldKey = StrCast(templateField.isTemplateForField) || StrCast(templateField.title).replace(/^-/, "");
+
+        // update the original template to mark it as a template
+        templateField.isTemplateForField = metadataFieldKey;
+        templateField.title = metadataFieldKey;
+
+        const templateFieldValue = templateField[metadataFieldKey] || templateField[Doc.LayoutFieldKey(templateField)];
+        const templateCaptionValue = templateField.caption;
+        // move any data that the template field had been rendering over to the template doc so that things will still be rendered
+        // when the template field is adjusted to point to the new metadatafield key.
+        // note 1: if the template field contained a list of documents, each of those documents will be converted to templates as well.
+        // note 2: this will not overwrite any field that already exists on the template doc at the field key
+        if (!templateDoc?.[metadataFieldKey] && templateFieldValue instanceof ObjectField) {
+            Cast(templateFieldValue, listSpec(Doc), [])?.map(d => d instanceof Doc && MakeMetadataFieldTemplate(d, templateDoc));
+            (Doc.GetProto(templateField)[metadataFieldKey] = ObjectField.MakeCopy(templateFieldValue));
+        }
+        // copy the textTemplates from 'this' (not 'self') because the layout contains the template info, not the original doc
+        if (templateCaptionValue instanceof RichTextField && !templateCaptionValue.Empty()) {
+            templateField["caption-textTemplate"] = ComputedField.MakeFunction(`copyField(this.caption)`);
+        }
+        if (templateFieldValue instanceof RichTextField && !templateFieldValue.Empty()) {
+            templateField[metadataFieldKey + "-textTemplate"] = ComputedField.MakeFunction(`copyField(this.${metadataFieldKey})`);
+        }
+
+        // get the layout string that the template uses to specify its layout
+        const templateFieldLayoutString = StrCast(Doc.LayoutField(Doc.Layout(templateField)));
+
+        // change it to render the target metadata field instead of what it was rendering before and assign it to the template field layout document.
+        Doc.Layout(templateField).layout = templateFieldLayoutString.replace(/fieldKey={'[^']*'}/, `fieldKey={'${metadataFieldKey}'}`);
+
+        // assign the template field doc a delegate of any extension document that was previously used to render the template field (since extension doc's carry rendering informatino)
+        Doc.Layout(templateField)[metadataFieldKey + "_ext"] = Doc.MakeDelegate(templateField[templateFieldLayoutString?.split("'")[1] + "_ext"] as Doc);
+
+        return true;
+    }
+
+    export function overlapping(doc1: Doc, doc2: Doc, clusterDistance: number) {
+        const doc2Layout = Doc.Layout(doc2);
+        const doc1Layout = Doc.Layout(doc1);
+        const x2 = NumCast(doc2.x) - clusterDistance;
+        const y2 = NumCast(doc2.y) - clusterDistance;
+        const w2 = NumCast(doc2Layout._width) + clusterDistance;
+        const h2 = NumCast(doc2Layout._height) + clusterDistance;
+        const x = NumCast(doc1.x) - clusterDistance;
+        const y = NumCast(doc1.y) - clusterDistance;
+        const w = NumCast(doc1Layout._width) + clusterDistance;
+        const h = NumCast(doc1Layout._height) + clusterDistance;
+        return doc1.z === doc2.z && intersectRect({ left: x, top: y, width: w, height: h }, { left: x2, top: y2, width: w2, height: h2 });
+    }
+
+    export function isBrushedHighlightedDegree(doc: Doc) {
+        if (Doc.IsHighlighted(doc)) {
+            return 6;
+        }
+        else {
+            return Doc.IsBrushedDegree(doc);
+        }
+    }
+
+    export class DocBrush {
+        BrushedDoc: ObservableMap<Doc, boolean> = new ObservableMap();
+    }
+    const brushManager = new DocBrush();
+
+    export class DocData {
+        @observable _user_doc: Doc = undefined!;
+        @observable _searchQuery: string = "";
+    }
+
+    // the document containing the view layout information - will be the Document itself unless the Document has
+    // a layout field or 'layout' is given.  
+    export function Layout(doc: Doc, layout?: Doc): Doc {
+        const overrideLayout = layout && Cast(doc[`${StrCast(layout.isTemplateForField, "data")}-layout[` + layout[Id] + "]"], Doc, null);
+        return overrideLayout || doc[LayoutSym] || doc;
+    }
+    export function SetLayout(doc: Doc, layout: Doc | string) { doc[StrCast(doc.layoutKey, "layout")] = layout; }
+    export function LayoutField(doc: Doc) { return doc[StrCast(doc.layoutKey, "layout")]; }
+    export function LayoutFieldKey(doc: Doc): string { return StrCast(Doc.Layout(doc).layout).split("'")[1]; }
+    const manager = new DocData();
+    export function SearchQuery(): string { return manager._searchQuery; }
+    export function SetSearchQuery(query: string) { runInAction(() => manager._searchQuery = query); }
+    export function UserDoc(): Doc { return manager._user_doc; }
+    export function SetUserDoc(doc: Doc) { manager._user_doc = doc; }
+    export function IsBrushed(doc: Doc) {
+        return computedFn(function IsBrushed(doc: Doc) {
+            return brushManager.BrushedDoc.has(doc) || brushManager.BrushedDoc.has(Doc.GetProto(doc));
+        })(doc);
+    }
+    // don't bother memoizing (caching) the result if called from a non-reactive context. (plus this avoids a warning message)
+    export function IsBrushedDegreeUnmemoized(doc: Doc) {
+        return brushManager.BrushedDoc.has(doc) ? 2 : brushManager.BrushedDoc.has(Doc.GetProto(doc)) ? 1 : 0;
+    }
+    export function IsBrushedDegree(doc: Doc) {
+        return computedFn(function IsBrushDegree(doc: Doc) {
+            return Doc.IsBrushedDegreeUnmemoized(doc);
+        })(doc);
+    }
+    export function BrushDoc(doc: Doc) {
+        brushManager.BrushedDoc.set(doc, true);
+        brushManager.BrushedDoc.set(Doc.GetProto(doc), true);
+        return doc;
+    }
+    export function UnBrushDoc(doc: Doc) {
+        brushManager.BrushedDoc.delete(doc);
+        brushManager.BrushedDoc.delete(Doc.GetProto(doc));
+        return doc;
+    }
+
+
+    export function LinkOtherAnchor(linkDoc: Doc, anchorDoc: Doc) { return Doc.AreProtosEqual(anchorDoc, Cast(linkDoc.anchor1, Doc) as Doc) ? Cast(linkDoc.anchor2, Doc) as Doc : Cast(linkDoc.anchor1, Doc) as Doc; }
+    export function LinkEndpoint(linkDoc: Doc, anchorDoc: Doc) { return Doc.AreProtosEqual(anchorDoc, Cast(linkDoc.anchor1, Doc) as Doc) ? "1" : "2"; }
+
+    export function linkFollowUnhighlight() {
+        Doc.UnhighlightAll();
+        document.removeEventListener("pointerdown", linkFollowUnhighlight);
+    }
+
+    let _lastDate = 0;
+    export function linkFollowHighlight(destDoc: Doc, dataAndDisplayDocs = true) {
+        linkFollowUnhighlight();
+        Doc.HighlightDoc(destDoc, dataAndDisplayDocs);
+        document.removeEventListener("pointerdown", linkFollowUnhighlight);
+        document.addEventListener("pointerdown", linkFollowUnhighlight);
+        const lastDate = _lastDate = Date.now();
+        window.setTimeout(() => _lastDate === lastDate && linkFollowUnhighlight(), 5000);
+    }
+
+    export class HighlightBrush {
+        @observable HighlightedDoc: Map<Doc, boolean> = new Map();
+    }
+    const highlightManager = new HighlightBrush();
+    export function IsHighlighted(doc: Doc) {
+        return highlightManager.HighlightedDoc.get(doc) || highlightManager.HighlightedDoc.get(Doc.GetProto(doc));
+    }
+    export function HighlightDoc(doc: Doc, dataAndDisplayDocs = true) {
+        runInAction(() => {
+            highlightManager.HighlightedDoc.set(doc, true);
+            dataAndDisplayDocs && highlightManager.HighlightedDoc.set(Doc.GetProto(doc), true);
+        });
+    }
+    export function UnHighlightDoc(doc: Doc) {
+        runInAction(() => {
+            highlightManager.HighlightedDoc.set(doc, false);
+            highlightManager.HighlightedDoc.set(Doc.GetProto(doc), false);
+        });
+    }
+    export function UnhighlightAll() {
+        const mapEntries = highlightManager.HighlightedDoc.keys();
+        let docEntry: IteratorResult<Doc>;
+        while (!(docEntry = mapEntries.next()).done) {
+            const targetDoc = docEntry.value;
+            targetDoc && Doc.UnHighlightDoc(targetDoc);
+        }
+
+    }
+    export function UnBrushAllDocs() {
+        brushManager.BrushedDoc.clear();
+    }
+
+    export function getDocTemplate(doc?: Doc) {
+        return doc?.isTemplateDoc ? doc :
+            Cast(doc?.dragFactory, Doc, null)?.isTemplateDoc ? doc?.dragFactory :
+                Cast(doc?.layout, Doc, null)?.isTemplateDoc ? doc?.layout : undefined;
+    }
+
+    export function matchFieldValue(doc: Doc, key: string, value: any): boolean {
+        const fieldVal = doc[key];
+        if (Cast(fieldVal, listSpec("string"), []).length) {
+            const vals = Cast(fieldVal, listSpec("string"), []);
+            return vals.some(v => v === value);
+        }
+        const fieldStr = Field.toString(fieldVal as Field);
+        return fieldStr === value;
+    }
+
+    export function deiconifyView(doc: any) {
+        StrCast(doc.layoutKey).split("_")[1] === "icon" && setNativeView(doc);
+    }
+
+    export function setNativeView(doc: any) {
+        const prevLayout = StrCast(doc.layoutKey).split("_")[1];
+        const deiconify = prevLayout === "icon" && StrCast(doc.deiconifyLayout) ? "layout_" + StrCast(doc.deiconifyLayout) : "";
+        prevLayout === "icon" && (doc.deiconifyLayout = undefined);
+        doc.layoutKey = deiconify || "layout";
+    }
+    export function setDocFilterRange(target: Doc, key: string, range?: number[]) {
+        const docRangeFilters = Cast(target._docRangeFilters, listSpec("string"), []);
+        for (let i = 0; i < docRangeFilters.length; i += 3) {
+            if (docRangeFilters[i] === key) {
+                docRangeFilters.splice(i, 3);
+                break;
+            }
+        }
+        if (range !== undefined) {
+            docRangeFilters.push(key);
+            docRangeFilters.push(range[0].toString());
+            docRangeFilters.push(range[1].toString());
+            target._docRangeFilters = new List<string>(docRangeFilters);
+        }
+    }
+
+    export function aliasDocs(field: any) {
+        return new List<Doc>(field.map((d: any) => Doc.MakeAlias(d)));
+    }
+
+    // filters document in a container collection:
+    // all documents with the specified value for the specified key are included/excluded 
+    // based on the modifiers :"check", "x", undefined
+    export function setDocFilter(container: Doc, key: string, value: any, modifiers?: "check" | "x" | undefined) {
+        const docFilters = Cast(container._docFilters, listSpec("string"), []);
+        for (let i = 0; i < docFilters.length; i += 3) {
+            if (docFilters[i] === key && docFilters[i + 1] === value) {
+                docFilters.splice(i, 3);
+                break;
+            }
+        }
+        if (typeof modifiers === "string") {
+            docFilters.push(key);
+            docFilters.push(value);
+            docFilters.push(modifiers);
+            container._docFilters = new List<string>(docFilters);
+        }
+    }
+    export function readDocRangeFilter(doc: Doc, key: string) {
+        const docRangeFilters = Cast(doc._docRangeFilters, listSpec("string"), []);
+        for (let i = 0; i < docRangeFilters.length; i += 3) {
+            if (docRangeFilters[i] === key) {
+                return [Number(docRangeFilters[i + 1]), Number(docRangeFilters[i + 2])];
+            }
+        }
+    }
+    export function assignDocToField(doc: Doc, field: string, id: string) {
+        DocServer.GetRefField(id).then(layout => layout instanceof Doc && (doc[field] = layout));
+        return id;
+    }
+
+    export function toggleNativeDimensions(layoutDoc: Doc, contentScale: number, panelWidth: number, panelHeight: number) {
+        runInAction(() => {
+            if (layoutDoc._nativeWidth || layoutDoc._nativeHeight) {
+                layoutDoc.scale = NumCast(layoutDoc.scale, 1) * contentScale;
+                layoutDoc._nativeWidth = undefined;
+                layoutDoc._nativeHeight = undefined;
+            }
+            else {
+                layoutDoc._autoHeight = false;
+                if (!layoutDoc._nativeWidth) {
+                    layoutDoc._nativeWidth = NumCast(layoutDoc._width, panelWidth);
+                    layoutDoc._nativeHeight = NumCast(layoutDoc._height, panelHeight);
+                }
+            }
+        });
+    }
+
+    export function isDocPinned(doc: Doc) {
+        //add this new doc to props.Document
+        const curPres = Cast(Doc.UserDoc().activePresentation, Doc) as Doc;
+        if (curPres) {
+            return DocListCast(curPres.data).findIndex((val) => Doc.AreProtosEqual(val, doc)) !== -1;
+        }
+        return false;
+    }
+
+    // applies a custom template to a document.  the template is identified by it's short name (e.g, slideView not layout_slideView)
+    export function makeCustomViewClicked(doc: Doc, creator: Opt<(documents: Array<Doc>, options: DocumentOptions, id?: string) => Doc>, templateSignature: string = "custom", docLayoutTemplate?: Doc) {
+        const batch = UndoManager.StartBatch("makeCustomViewClicked");
+        runInAction(() => {
+            doc.layoutKey = "layout_" + templateSignature;
+            if (doc[doc.layoutKey] === undefined) {
+                createCustomView(doc, creator, templateSignature, docLayoutTemplate);
+            }
+        });
+        batch.end();
+    }
+    export function findTemplate(templateName: string, type: string, signature: string) {
+        let docLayoutTemplate: Opt<Doc>;
+        const iconViews = DocListCast(Cast(Doc.UserDoc()["template-icons"], Doc, null)?.data);
+        const templBtns = DocListCast(Cast(Doc.UserDoc()["template-buttons"], Doc, null)?.data);
+        const noteTypes = DocListCast(Cast(Doc.UserDoc()["template-notes"], Doc, null)?.data);
+        const clickFuncs = DocListCast(Cast(Doc.UserDoc().clickFuncs, Doc, null)?.data);
+        const allTemplates = iconViews.concat(templBtns).concat(noteTypes).concat(clickFuncs).map(btnDoc => (btnDoc.dragFactory as Doc) || btnDoc).filter(doc => doc.isTemplateDoc);
+        // bcz: this is hacky -- want to have different templates be applied depending on the "type" of a document.  but type is not reliable and there could be other types of template searches so this should be generalized
+        // first try to find a template that matches the specific document type (<typeName>_<templateName>).  otherwise, fallback to a general match on <templateName>
+        !docLayoutTemplate && allTemplates.forEach(tempDoc => StrCast(tempDoc.title) === templateName + "_" + type && (docLayoutTemplate = tempDoc));
+        !docLayoutTemplate && allTemplates.forEach(tempDoc => StrCast(tempDoc.title) === templateName && (docLayoutTemplate = tempDoc));
+        return docLayoutTemplate;
+    }
+    export function createCustomView(doc: Doc, creator: Opt<(documents: Array<Doc>, options: DocumentOptions, id?: string) => Doc>, templateSignature: string = "custom", docLayoutTemplate?: Doc) {
+        const templateName = templateSignature.replace(/\(.*\)/, "");
+        docLayoutTemplate = docLayoutTemplate || findTemplate(templateName, StrCast(doc.type), templateSignature);
+
+        const customName = "layout_" + templateSignature;
+        const _width = NumCast(doc._width);
+        const _height = NumCast(doc._height);
+        const options = { title: "data", backgroundColor: StrCast(doc.backgroundColor), _autoHeight: true, _width, x: -_width / 2, y: - _height / 2, _showSidebar: false };
+
+        let fieldTemplate: Opt<Doc>;
+        if (doc.data instanceof RichTextField || typeof (doc.data) === "string") {
+            fieldTemplate = Docs.Create.TextDocument("", options);
+        } else if (doc.data instanceof PdfField) {
+            fieldTemplate = Docs.Create.PdfDocument("http://www.msn.com", options);
+        } else if (doc.data instanceof VideoField) {
+            fieldTemplate = Docs.Create.VideoDocument("http://www.cs.brown.edu", options);
+        } else if (doc.data instanceof AudioField) {
+            fieldTemplate = Docs.Create.AudioDocument("http://www.cs.brown.edu", options);
+        } else if (doc.data instanceof ImageField) {
+            fieldTemplate = Docs.Create.ImageDocument("http://www.cs.brown.edu", options);
+        }
+        const docTemplate = docLayoutTemplate || creator?.(fieldTemplate ? [fieldTemplate] : [], { title: customName + "(" + doc.title + ")", isTemplateDoc: true, _width: _width + 20, _height: Math.max(100, _height + 45) });
+
+        fieldTemplate && Doc.MakeMetadataFieldTemplate(fieldTemplate, docTemplate ? Doc.GetProto(docTemplate) : docTemplate);
+        docTemplate && Doc.ApplyTemplateTo(docTemplate, doc, customName, undefined);
+    }
+    export function makeCustomView(doc: Doc, custom: boolean, layout: string) {
+        Doc.setNativeView(doc);
+        if (custom) {
+            makeCustomViewClicked(doc, Docs.Create.StackingDocument, layout, undefined);
+        }
+    }
+    export function iconify(doc: Doc) {
+        const layoutKey = Cast(doc.layoutKey, "string", null);
+        Doc.makeCustomViewClicked(doc, Docs.Create.StackingDocument, "icon", undefined);
+        if (layoutKey && layoutKey !== "layout" && layoutKey !== "layout_icon") doc.deiconifyLayout = layoutKey.replace("layout_", "");
+    }
+
+    export function pileup(selected: Doc[], x: number, y: number) {
+        const newCollection = Docs.Create.PileDocument(selected, { title: "pileup", x: x - 55, y: y - 55, _width: 110, _height: 100, _LODdisable: true });
+        let w = 0, h = 0;
+        selected.forEach((d, i) => {
+            Doc.iconify(d);
+            w = Math.max(d[WidthSym](), w);
+            h = Math.max(d[HeightSym](), h);
+        });
+        h = Math.max(h, w * 4 / 3); // converting to an icon does not update the height right away.  so this is a fallback hack to try to do something reasonable
+        selected.forEach((d, i) => {
+            d.x = Math.cos(Math.PI * 2 * i / selected.length) * 10 - w / 2;
+            d.y = Math.sin(Math.PI * 2 * i / selected.length) * 10 - h / 2;
+            d.displayTimecode = undefined;  // bcz: this should be automatic somehow.. along with any other properties that were logically associated with the original collection
+        });
+        newCollection.x = NumCast(newCollection.x) + NumCast(newCollection._width) / 2 - 55;
+        newCollection.y = NumCast(newCollection.y) + NumCast(newCollection._height) / 2 - 55;
+        newCollection._width = newCollection._height = 110;
+        //newCollection.borderRounding = "40px";
+        newCollection._jitterRotation = 10;
+        newCollection._backgroundColor = "gray";
+        newCollection._overflow = "visible";
+        return newCollection;
+    }
+
+
+    export async function addFieldEnumerations(doc: Opt<Doc>, enumeratedFieldKey: string, enumerations: { title: string, _backgroundColor?: string, color?: string }[]) {
+        let optionsCollection = await DocServer.GetRefField(enumeratedFieldKey);
+        if (!(optionsCollection instanceof Doc)) {
+            optionsCollection = Docs.Create.StackingDocument([], { title: `${enumeratedFieldKey} field set` }, enumeratedFieldKey);
+            Doc.AddDocToList((Doc.UserDoc().fieldTypes as Doc), "data", optionsCollection as Doc);
+        }
+        const options = optionsCollection as Doc;
+        const targetDoc = doc && Doc.GetProto(Cast(doc.rootDocument, Doc, null) || doc);
+        const docFind = `options.data.find(doc => doc.title === (this.rootDocument||this)["${enumeratedFieldKey}"])?`;
+        targetDoc && (targetDoc.backgroundColor = ComputedField.MakeFunction(docFind + `._backgroundColor || "white"`, undefined, { options }));
+        targetDoc && (targetDoc.color = ComputedField.MakeFunction(docFind + `.color || "black"`, undefined, { options }));
+        targetDoc && (targetDoc.borderRounding = ComputedField.MakeFunction(docFind + `.borderRounding`, undefined, { options }));
+        enumerations.map(enumeration => {
+            const found = DocListCast(options.data).find(d => d.title === enumeration.title);
+            if (found) {
+                found._backgroundColor = enumeration._backgroundColor || found._backgroundColor;
+                found._color = enumeration.color || found._color;
+            } else {
+                Doc.AddDocToList(options, "data", Docs.Create.TextDocument(enumeration.title, enumeration));
+            }
+        });
+        return optionsCollection;
+    }
+}
+
+Scripting.addGlobal(function renameAlias(doc: any, n: any) { return StrCast(Doc.GetProto(doc).title).replace(/\([0-9]*\)/, "") + `(${n})`; });
+Scripting.addGlobal(function getProto(doc: any) { return Doc.GetProto(doc); });
+Scripting.addGlobal(function getDocTemplate(doc?: any) { return Doc.getDocTemplate(doc); });
+Scripting.addGlobal(function getAlias(doc: any) { return Doc.MakeAlias(doc); });
+Scripting.addGlobal(function getCopy(doc: any, copyProto: any) { return doc.isTemplateDoc ? Doc.ApplyTemplate(doc) : Doc.MakeCopy(doc, copyProto); });
+Scripting.addGlobal(function copyField(field: any) { return ObjectField.MakeCopy(field); });
+Scripting.addGlobal(function aliasDocs(field: any) { return Doc.aliasDocs(field); });
+Scripting.addGlobal(function docList(field: any) { return DocListCast(field); });
+Scripting.addGlobal(function setInPlace(doc: any, field: any, value: any) { return Doc.SetInPlace(doc, field, value, false); });
+Scripting.addGlobal(function sameDocs(doc1: any, doc2: any) { return Doc.AreProtosEqual(doc1, doc2); });
+Scripting.addGlobal(function deiconifyView(doc: any) { Doc.deiconifyView(doc); });
+Scripting.addGlobal(function undo() { return UndoManager.Undo(); });
+Scripting.addGlobal(function redo() { return UndoManager.Redo(); });
+Scripting.addGlobal(function DOC(id: string) { console.log("Can't parse a document id in a script"); return "invalid"; });
+Scripting.addGlobal(function assignDoc(doc: Doc, field: string, id: string) { return Doc.assignDocToField(doc, field, id); });
+Scripting.addGlobal(function docCast(doc: FieldResult): any { return DocCastAsync(doc); });
+Scripting.addGlobal(function activePresentationItem() {
+    const curPres = Doc.UserDoc().activePresentation as Doc;
+    return curPres && DocListCast(curPres[Doc.LayoutFieldKey(curPres)])[NumCast(curPres._itemIndex)];
+});
+Scripting.addGlobal(function selectDoc(doc: any) { Doc.UserDoc().activeSelection = new List([doc]); });
+Scripting.addGlobal(function selectedDocs(container: Doc, excludeCollections: boolean, prevValue: any) {
+    const docs = DocListCast(Doc.UserDoc().activeSelection).
+        filter(d => !Doc.AreProtosEqual(d, container) && !d.annotationOn && d.type !== DocumentType.DOCHOLDER && d.type !== DocumentType.KVP &&
+            (!excludeCollections || d.type !== DocumentType.COL || !Cast(d.data, listSpec(Doc), null)));
+    return docs.length ? new List(docs) : prevValue;
+});
+Scripting.addGlobal(function setDocFilter(container: Doc, key: string, value: any, modifiers?: "check" | "x" | undefined) { Doc.setDocFilter(container, key, value, modifiers); });
+Scripting.addGlobal(function setDocFilterRange(container: Doc, key: string, range: number[]) { Doc.setDocFilterRange(container, key, range); });
\ No newline at end of file
diff --git a/src/fields/FieldSymbols.ts b/src/fields/FieldSymbols.ts
new file mode 100644
index 000000000..8d040f493
--- /dev/null
+++ b/src/fields/FieldSymbols.ts
@@ -0,0 +1,12 @@
+
+export const Update = Symbol("Update");
+export const Self = Symbol("Self");
+export const SelfProxy = Symbol("SelfProxy");
+export const HandleUpdate = Symbol("HandleUpdate");
+export const Id = Symbol("Id");
+export const OnUpdate = Symbol("OnUpdate");
+export const Parent = Symbol("Parent");
+export const Copy = Symbol("Copy");
+export const ToScriptString = Symbol("ToScriptString");
+export const ToPlainText = Symbol("ToPlainText");
+export const ToString = Symbol("ToString");
diff --git a/src/fields/HtmlField.ts b/src/fields/HtmlField.ts
new file mode 100644
index 000000000..6e8bba977
--- /dev/null
+++ b/src/fields/HtmlField.ts
@@ -0,0 +1,26 @@
+import { Deserializable } from "../client/util/SerializationHelper";
+import { serializable, primitive } from "serializr";
+import { ObjectField } from "./ObjectField";
+import { Copy, ToScriptString, ToString} from "./FieldSymbols";
+
+@Deserializable("html")
+export class HtmlField extends ObjectField {
+    @serializable(primitive())
+    readonly html: string;
+
+    constructor(html: string) {
+        super();
+        this.html = html;
+    }
+
+    [Copy]() {
+        return new HtmlField(this.html);
+    }
+
+    [ToScriptString]() {
+        return "invalid";
+    }
+    [ToString]() {
+        return this.html;
+    }
+}
diff --git a/src/fields/IconField.ts b/src/fields/IconField.ts
new file mode 100644
index 000000000..76c4ddf1b
--- /dev/null
+++ b/src/fields/IconField.ts
@@ -0,0 +1,26 @@
+import { Deserializable } from "../client/util/SerializationHelper";
+import { serializable, primitive } from "serializr";
+import { ObjectField } from "./ObjectField";
+import { Copy, ToScriptString, ToString } from "./FieldSymbols";
+
+@Deserializable("icon")
+export class IconField extends ObjectField {
+    @serializable(primitive())
+    readonly icon: string;
+
+    constructor(icon: string) {
+        super();
+        this.icon = icon;
+    }
+
+    [Copy]() {
+        return new IconField(this.icon);
+    }
+
+    [ToScriptString]() {
+        return "invalid";
+    }
+    [ToString]() {
+        return "ICONfield";
+    }
+}
diff --git a/src/fields/InkField.ts b/src/fields/InkField.ts
new file mode 100644
index 000000000..bb93de5ac
--- /dev/null
+++ b/src/fields/InkField.ts
@@ -0,0 +1,50 @@
+import { Deserializable } from "../client/util/SerializationHelper";
+import { serializable, custom, createSimpleSchema, list, object, map } from "serializr";
+import { ObjectField } from "./ObjectField";
+import { Copy, ToScriptString, ToString } from "./FieldSymbols";
+
+export enum InkTool {
+    None,
+    Pen,
+    Highlighter,
+    Eraser,
+    Stamp
+}
+
+export interface PointData {
+    X: number;
+    Y: number;
+}
+
+export type InkData = Array<PointData>;
+
+const pointSchema = createSimpleSchema({
+    X: true, Y: true
+});
+
+const strokeDataSchema = createSimpleSchema({
+    pathData: list(object(pointSchema)),
+    "*": true
+});
+
+@Deserializable("ink")
+export class InkField extends ObjectField {
+    @serializable(list(object(strokeDataSchema)))
+    readonly inkData: InkData;
+
+    constructor(data: InkData) {
+        super();
+        this.inkData = data;
+    }
+
+    [Copy]() {
+        return new InkField(this.inkData);
+    }
+
+    [ToScriptString]() {
+        return "invalid";
+    }
+    [ToString]() {
+        return "InkField";
+    }
+}
diff --git a/src/fields/List.ts b/src/fields/List.ts
new file mode 100644
index 000000000..fdabea365
--- /dev/null
+++ b/src/fields/List.ts
@@ -0,0 +1,330 @@
+import { Deserializable, autoObject, afterDocDeserialize } from "../client/util/SerializationHelper";
+import { Field } from "./Doc";
+import { setter, getter, deleteProperty, updateFunction } from "./util";
+import { serializable, alias, list } from "serializr";
+import { observable, action, runInAction } from "mobx";
+import { ObjectField } from "./ObjectField";
+import { RefField } from "./RefField";
+import { ProxyField } from "./Proxy";
+import { Self, Update, Parent, OnUpdate, SelfProxy, ToScriptString, ToString, Copy, Id } from "./FieldSymbols";
+import { Scripting } from "../client/util/Scripting";
+import { DocServer } from "../client/DocServer";
+
+const listHandlers: any = {
+    /// Mutator methods
+    copyWithin() {
+        throw new Error("copyWithin not supported yet");
+    },
+    fill(value: any, start?: number, end?: number) {
+        if (value instanceof RefField) {
+            throw new Error("fill with RefFields not supported yet");
+        }
+        const res = this[Self].__fields.fill(value, start, end);
+        this[Update]();
+        return res;
+    },
+    pop(): any {
+        const field = toRealField(this[Self].__fields.pop());
+        this[Update]();
+        return field;
+    },
+    push: action(function (this: any, ...items: any[]) {
+        items = items.map(toObjectField);
+        const list = this[Self];
+        const length = list.__fields.length;
+        for (let i = 0; i < items.length; i++) {
+            const item = items[i];
+            //TODO Error checking to make sure parent doesn't already exist
+            if (item instanceof ObjectField) {
+                item[Parent] = list;
+                item[OnUpdate] = updateFunction(list, i + length, item, this);
+            }
+        }
+        const res = list.__fields.push(...items);
+        this[Update]();
+        return res;
+    }),
+    reverse() {
+        const res = this[Self].__fields.reverse();
+        this[Update]();
+        return res;
+    },
+    shift() {
+        const res = toRealField(this[Self].__fields.shift());
+        this[Update]();
+        return res;
+    },
+    sort(cmpFunc: any) {
+        this[Self].__realFields(); // coerce retrieving entire array
+        const res = this[Self].__fields.sort(cmpFunc ? (first: any, second: any) => cmpFunc(toRealField(first), toRealField(second)) : undefined);
+        this[Update]();
+        return res;
+    },
+    splice: action(function (this: any, start: number, deleteCount: number, ...items: any[]) {
+        this[Self].__realFields(); // coerce retrieving entire array
+        items = items.map(toObjectField);
+        const list = this[Self];
+        for (let i = 0; i < items.length; i++) {
+            const item = items[i];
+            //TODO Error checking to make sure parent doesn't already exist
+            //TODO Need to change indices of other fields in array
+            if (item instanceof ObjectField) {
+                item[Parent] = list;
+                item[OnUpdate] = updateFunction(list, i + start, item, this);
+            }
+        }
+        const res = list.__fields.splice(start, deleteCount, ...items);
+        this[Update]();
+        return res.map(toRealField);
+    }),
+    unshift(...items: any[]) {
+        items = items.map(toObjectField);
+        const list = this[Self];
+        const length = list.__fields.length;
+        for (let i = 0; i < items.length; i++) {
+            const item = items[i];
+            //TODO Error checking to make sure parent doesn't already exist
+            //TODO Need to change indices of other fields in array
+            if (item instanceof ObjectField) {
+                item[Parent] = list;
+                item[OnUpdate] = updateFunction(list, i, item, this);
+            }
+        }
+        const res = this[Self].__fields.unshift(...items);
+        this[Update]();
+        return res;
+
+    },
+    /// Accessor methods
+    concat: action(function (this: any, ...items: any[]) {
+        this[Self].__realFields();
+        return this[Self].__fields.map(toRealField).concat(...items);
+    }),
+    includes(valueToFind: any, fromIndex: number) {
+        if (valueToFind instanceof RefField) {
+            return this[Self].__realFields().includes(valueToFind, fromIndex);
+        } else {
+            return this[Self].__fields.includes(valueToFind, fromIndex);
+        }
+    },
+    indexOf(valueToFind: any, fromIndex: number) {
+        if (valueToFind instanceof RefField) {
+            return this[Self].__realFields().indexOf(valueToFind, fromIndex);
+        } else {
+            return this[Self].__fields.indexOf(valueToFind, fromIndex);
+        }
+    },
+    join(separator: any) {
+        this[Self].__realFields();
+        return this[Self].__fields.map(toRealField).join(separator);
+    },
+    lastIndexOf(valueToFind: any, fromIndex: number) {
+        if (valueToFind instanceof RefField) {
+            return this[Self].__realFields().lastIndexOf(valueToFind, fromIndex);
+        } else {
+            return this[Self].__fields.lastIndexOf(valueToFind, fromIndex);
+        }
+    },
+    slice(begin: number, end: number) {
+        this[Self].__realFields();
+        return this[Self].__fields.slice(begin, end).map(toRealField);
+    },
+
+    /// Iteration methods
+    entries() {
+        return this[Self].__realFields().entries();
+    },
+    every(callback: any, thisArg: any) {
+        return this[Self].__realFields().every(callback, thisArg);
+        // TODO This is probably more efficient, but technically the callback can take the array, which would mean we would have to map the actual array anyway.
+        // If we don't want to support the array parameter, we should use this version instead
+        // return this[Self].__fields.every((element:any, index:number, array:any) => callback(toRealField(element), index, array), thisArg);
+    },
+    filter(callback: any, thisArg: any) {
+        return this[Self].__realFields().filter(callback, thisArg);
+        // TODO This is probably more efficient, but technically the callback can take the array, which would mean we would have to map the actual array anyway.
+        // If we don't want to support the array parameter, we should use this version instead
+        // return this[Self].__fields.filter((element:any, index:number, array:any) => callback(toRealField(element), index, array), thisArg);
+    },
+    find(callback: any, thisArg: any) {
+        return this[Self].__realFields().find(callback, thisArg);
+        // TODO This is probably more efficient, but technically the callback can take the array, which would mean we would have to map the actual array anyway.
+        // If we don't want to support the array parameter, we should use this version instead
+        // return this[Self].__fields.find((element:any, index:number, array:any) => callback(toRealField(element), index, array), thisArg);
+    },
+    findIndex(callback: any, thisArg: any) {
+        return this[Self].__realFields().findIndex(callback, thisArg);
+        // TODO This is probably more efficient, but technically the callback can take the array, which would mean we would have to map the actual array anyway.
+        // If we don't want to support the array parameter, we should use this version instead
+        // return this[Self].__fields.findIndex((element:any, index:number, array:any) => callback(toRealField(element), index, array), thisArg);
+    },
+    forEach(callback: any, thisArg: any) {
+        return this[Self].__realFields().forEach(callback, thisArg);
+        // TODO This is probably more efficient, but technically the callback can take the array, which would mean we would have to map the actual array anyway.
+        // If we don't want to support the array parameter, we should use this version instead
+        // return this[Self].__fields.forEach((element:any, index:number, array:any) => callback(toRealField(element), index, array), thisArg);
+    },
+    map(callback: any, thisArg: any) {
+        return this[Self].__realFields().map(callback, thisArg);
+        // TODO This is probably more efficient, but technically the callback can take the array, which would mean we would have to map the actual array anyway.
+        // If we don't want to support the array parameter, we should use this version instead
+        // return this[Self].__fields.map((element:any, index:number, array:any) => callback(toRealField(element), index, array), thisArg);
+    },
+    reduce(callback: any, initialValue: any) {
+        return this[Self].__realFields().reduce(callback, initialValue);
+        // TODO This is probably more efficient, but technically the callback can take the array, which would mean we would have to map the actual array anyway.
+        // If we don't want to support the array parameter, we should use this version instead
+        // return this[Self].__fields.reduce((acc:any, element:any, index:number, array:any) => callback(acc, toRealField(element), index, array), initialValue);
+    },
+    reduceRight(callback: any, initialValue: any) {
+        return this[Self].__realFields().reduceRight(callback, initialValue);
+        // TODO This is probably more efficient, but technically the callback can take the array, which would mean we would have to map the actual array anyway.
+        // If we don't want to support the array parameter, we should use this version instead
+        // return this[Self].__fields.reduceRight((acc:any, element:any, index:number, array:any) => callback(acc, toRealField(element), index, array), initialValue);
+    },
+    some(callback: any, thisArg: any) {
+        return this[Self].__realFields().some(callback, thisArg);
+        // TODO This is probably more efficient, but technically the callback can take the array, which would mean we would have to map the actual array anyway.
+        // If we don't want to support the array parameter, we should use this version instead
+        // return this[Self].__fields.some((element:any, index:number, array:any) => callback(toRealField(element), index, array), thisArg);
+    },
+    values() {
+        return this[Self].__realFields().values();
+    },
+    [Symbol.iterator]() {
+        return this[Self].__realFields().values();
+    }
+};
+
+function toObjectField(field: Field) {
+    return field instanceof RefField ? new ProxyField(field) : field;
+}
+
+function toRealField(field: Field) {
+    return field instanceof ProxyField ? field.value() : field;
+}
+
+function listGetter(target: any, prop: string | number | symbol, receiver: any): any {
+    if (listHandlers.hasOwnProperty(prop)) {
+        return listHandlers[prop];
+    }
+    return getter(target, prop, receiver);
+}
+
+interface ListSpliceUpdate<T> {
+    type: "splice";
+    index: number;
+    added: T[];
+    removedCount: number;
+}
+
+interface ListIndexUpdate<T> {
+    type: "update";
+    index: number;
+    newValue: T;
+}
+
+type ListUpdate<T> = ListSpliceUpdate<T> | ListIndexUpdate<T>;
+
+type StoredType<T extends Field> = T extends RefField ? ProxyField<T> : T;
+
+@Deserializable("list")
+class ListImpl<T extends Field> extends ObjectField {
+    constructor(fields?: T[]) {
+        super();
+        const list = new Proxy<this>(this, {
+            set: setter,
+            get: listGetter,
+            ownKeys: target => Object.keys(target.__fields),
+            getOwnPropertyDescriptor: (target, prop) => {
+                if (prop in target.__fields) {
+                    return {
+                        configurable: true,//TODO Should configurable be true?
+                        enumerable: true,
+                    };
+                }
+                return Reflect.getOwnPropertyDescriptor(target, prop);
+            },
+            deleteProperty: deleteProperty,
+            defineProperty: () => { throw new Error("Currently properties can't be defined on documents using Object.defineProperty"); },
+        });
+        this[SelfProxy] = list;
+        if (fields) {
+            (list as any).push(...fields);
+        }
+        return list;
+    }
+
+    [key: number]: T | (T extends RefField ? Promise<T> : never);
+
+    // this requests all ProxyFields at the same time to avoid the overhead
+    // of separate network requests and separate updates to the React dom.
+    private __realFields() {
+        const waiting = this.__fields.filter(f => f instanceof ProxyField && f.promisedValue());
+        const promised = waiting.map(f => f instanceof ProxyField ? f.promisedValue() : "");
+        // if we find any ProxyFields that don't have a current value, then
+        // start the server request for all of them
+        if (promised.length) {
+            const promise = DocServer.GetRefFields(promised);
+            // as soon as we get the fields from the server, set all the list values in one
+            // action to generate one React dom update.
+            promise.then(fields => runInAction(() => {
+                waiting.map((w, i) => w instanceof ProxyField && w.setValue(fields[promised[i]]));
+            }));
+            // we also have to mark all lists items with this promise so that any calls to them
+            // will await the batch request.
+            // This counts on the handler for 'promise' in the call above being invoked before the
+            // handler for 'promise' in the lines below.
+            waiting.map((w, i) => {
+                w instanceof ProxyField && w.setPromise(promise.then(fields => fields[promised[i]]));
+            });
+        }
+        return this.__fields.map(toRealField);
+    }
+
+    @serializable(alias("fields", list(autoObject(), { afterDeserialize: afterDocDeserialize })))
+    private get __fields() {
+        return this.___fields;
+    }
+
+    private set __fields(value) {
+        this.___fields = value;
+        for (const key in value) {
+            const field = value[key];
+            if (!(field instanceof ObjectField)) continue;
+            (field as ObjectField)[Parent] = this[Self];
+            (field as ObjectField)[OnUpdate] = updateFunction(this[Self], key, field, this[SelfProxy]);
+        }
+    }
+
+    [Copy]() {
+        const copiedData = this[Self].__fields.map(f => f instanceof ObjectField ? f[Copy]() : f);
+        const deepCopy = new ListImpl<T>(copiedData as any);
+        return deepCopy;
+    }
+
+    // @serializable(alias("fields", list(autoObject())))
+    @observable
+    private ___fields: StoredType<T>[] = [];
+
+    private [Update] = (diff: any) => {
+        // console.log(diff);
+        const update = this[OnUpdate];
+        // update && update(diff);
+        update?.();
+    }
+
+    private [Self] = this;
+    private [SelfProxy]: any;
+
+    [ToScriptString]() {
+        return `new List([${(this as any).map((field: any) => Field.toScriptString(field))}])`;
+    }
+    [ToString]() {
+        return "List";
+    }
+}
+export type List<T extends Field> = ListImpl<T> & (T | (T extends RefField ? Promise<T> : never))[];
+export const List: { new <T extends Field>(fields?: T[]): List<T> } = ListImpl as any;
+
+Scripting.addGlobal("List", List);
\ No newline at end of file
diff --git a/src/fields/ListSpec.ts b/src/fields/ListSpec.ts
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/src/fields/ListSpec.ts
diff --git a/src/fields/ObjectField.ts b/src/fields/ObjectField.ts
new file mode 100644
index 000000000..9aa1c9b04
--- /dev/null
+++ b/src/fields/ObjectField.ts
@@ -0,0 +1,20 @@
+import { RefField } from "./RefField";
+import { OnUpdate, Parent, Copy, ToScriptString, ToString } from "./FieldSymbols";
+import { Scripting } from "../client/util/Scripting";
+
+export abstract class ObjectField {
+    protected [OnUpdate](diff?: any) { }
+    private [Parent]?: RefField | ObjectField;
+    abstract [Copy](): ObjectField;
+
+    abstract [ToScriptString](): string;
+    abstract [ToString](): string;
+}
+
+export namespace ObjectField {
+    export function MakeCopy<T extends ObjectField>(field: T) {
+        return field?.[Copy]();
+    }
+}
+
+Scripting.addGlobal(ObjectField);
\ No newline at end of file
diff --git a/src/fields/PresField.ts b/src/fields/PresField.ts
new file mode 100644
index 000000000..f236a04fd
--- /dev/null
+++ b/src/fields/PresField.ts
@@ -0,0 +1,6 @@
+//insert code here
+import { ObjectField } from "./ObjectField";
+
+export abstract class PresField extends ObjectField {
+
+}
\ No newline at end of file
diff --git a/src/fields/Proxy.ts b/src/fields/Proxy.ts
new file mode 100644
index 000000000..555faaad0
--- /dev/null
+++ b/src/fields/Proxy.ts
@@ -0,0 +1,126 @@
+import { Deserializable } from "../client/util/SerializationHelper";
+import { FieldWaiting } from "./Doc";
+import { primitive, serializable } from "serializr";
+import { observable, action, runInAction } from "mobx";
+import { DocServer } from "../client/DocServer";
+import { RefField } from "./RefField";
+import { ObjectField } from "./ObjectField";
+import { Id, Copy, ToScriptString, ToString } from "./FieldSymbols";
+import { scriptingGlobal } from "../client/util/Scripting";
+import { Plugins } from "./util";
+
+@Deserializable("proxy")
+export class ProxyField<T extends RefField> extends ObjectField {
+    constructor();
+    constructor(value: T);
+    constructor(fieldId: string);
+    constructor(value?: T | string) {
+        super();
+        if (typeof value === "string") {
+            this.fieldId = value;
+        } else if (value) {
+            this.cache = value;
+            this.fieldId = value[Id];
+        }
+    }
+
+    [Copy]() {
+        if (this.cache) return new ProxyField<T>(this.cache);
+        return new ProxyField<T>(this.fieldId);
+    }
+
+    [ToScriptString]() {
+        return "invalid";
+    }
+    [ToString]() {
+        return "ProxyField";
+    }
+
+    @serializable(primitive())
+    readonly fieldId: string = "";
+
+    // This getter/setter and nested object thing is 
+    // because mobx doesn't play well with observable proxies
+    @observable.ref
+    private _cache: { readonly field: T | undefined } = { field: undefined };
+    private get cache(): T | undefined {
+        return this._cache.field;
+    }
+    private set cache(field: T | undefined) {
+        this._cache = { field };
+    }
+
+    private failed = false;
+    private promise?: Promise<any>;
+
+    value(): T | undefined | FieldWaiting<T> {
+        if (this.cache) {
+            return this.cache;
+        }
+        if (this.failed) {
+            return undefined;
+        }
+        if (!this.promise) {
+            const cached = DocServer.GetCachedRefField(this.fieldId);
+            if (cached !== undefined) {
+                runInAction(() => this.cache = cached as any);
+                return cached as any;
+            }
+            this.promise = DocServer.GetRefField(this.fieldId).then(action((field: any) => {
+                this.promise = undefined;
+                this.cache = field;
+                if (field === undefined) this.failed = true;
+                return field;
+            }));
+        }
+        return this.promise as any;
+    }
+    promisedValue(): string { return !this.cache && !this.failed && !this.promise ? this.fieldId : ""; }
+    setPromise(promise: any) {
+        this.promise = promise;
+    }
+    @action
+    setValue(field: any) {
+        this.promise = undefined;
+        this.cache = field;
+        if (field === undefined) this.failed = true;
+        return field;
+    }
+}
+
+export namespace ProxyField {
+    let useProxy = true;
+    export function DisableProxyFields() {
+        useProxy = false;
+    }
+
+    export function EnableProxyFields() {
+        useProxy = true;
+    }
+
+    export function WithoutProxy<T>(fn: () => T) {
+        DisableProxyFields();
+        try {
+            return fn();
+        } finally {
+            EnableProxyFields();
+        }
+    }
+
+    export function initPlugin() {
+        Plugins.addGetterPlugin((doc, _, value) => {
+            if (useProxy && value instanceof ProxyField) {
+                return { value: value.value() };
+            }
+        });
+    }
+}
+
+function prefetchValue(proxy: PrefetchProxy<RefField>) {
+    return proxy.value() as any;
+}
+
+@scriptingGlobal
+@Deserializable("prefetch_proxy", prefetchValue)
+export class PrefetchProxy<T extends RefField> extends ProxyField<T> {
+}
diff --git a/src/fields/RefField.ts b/src/fields/RefField.ts
new file mode 100644
index 000000000..b6ef69750
--- /dev/null
+++ b/src/fields/RefField.ts
@@ -0,0 +1,21 @@
+import { serializable, primitive, alias } from "serializr";
+import { Utils } from "../Utils";
+import { Id, HandleUpdate, ToScriptString, ToString } from "./FieldSymbols";
+import { afterDocDeserialize } from "../client/util/SerializationHelper";
+
+export type FieldId = string;
+export abstract class RefField {
+    @serializable(alias("id", primitive({ afterDeserialize: afterDocDeserialize })))
+    private __id: FieldId;
+    readonly [Id]: FieldId;
+
+    constructor(id?: FieldId) {
+        this.__id = id || Utils.GenerateGuid();
+        this[Id] = this.__id;
+    }
+
+    protected [HandleUpdate]?(diff: any): void | Promise<void>;
+
+    abstract [ToScriptString](): string;
+    abstract [ToString](): string;
+}
diff --git a/src/fields/RichTextField.ts b/src/fields/RichTextField.ts
new file mode 100644
index 000000000..5cf0e0cc3
--- /dev/null
+++ b/src/fields/RichTextField.ts
@@ -0,0 +1,41 @@
+import { ObjectField } from "./ObjectField";
+import { serializable } from "serializr";
+import { Deserializable } from "../client/util/SerializationHelper";
+import { Copy, ToScriptString, ToPlainText, ToString } from "./FieldSymbols";
+import { scriptingGlobal } from "../client/util/Scripting";
+
+@scriptingGlobal
+@Deserializable("RichTextField")
+export class RichTextField extends ObjectField {
+    @serializable(true)
+    readonly Data: string;
+
+    @serializable(true)
+    readonly Text: string;
+
+    constructor(data: string, text: string = "") {
+        super();
+        this.Data = data;
+        this.Text = text;
+    }
+
+    Empty() {
+        return !(this.Text || this.Data.toString().includes("dashField"));
+    }
+
+    [Copy]() {
+        return new RichTextField(this.Data, this.Text);
+    }
+
+    [ToScriptString]() {
+        return `new RichTextField("${this.Data}", "${this.Text}")`;
+    }
+    [ToString]() {
+        return this.Text;
+    }
+
+    public static DashField(fieldKey: string) {
+        return new RichTextField(`{"doc":{"type":"doc","content":[{"type":"paragraph","attrs":{"align":null,"color":null,"id":null,"indent":null,"inset":null,"lineSpacing":null,"paddingBottom":null,"paddingTop":null},"content":[{"type":"dashField","attrs":{"fieldKey":"${fieldKey}","docid":""}}]}]},"selection":{"type":"text","anchor":2,"head":2},"storedMarks":[]}`, "");
+    }
+
+}
\ No newline at end of file
diff --git a/src/fields/RichTextUtils.ts b/src/fields/RichTextUtils.ts
new file mode 100644
index 000000000..c475d0d73
--- /dev/null
+++ b/src/fields/RichTextUtils.ts
@@ -0,0 +1,519 @@
+import { AssertionError } from "assert";
+import { docs_v1 } from "googleapis";
+import { Fragment, Mark, Node } from "prosemirror-model";
+import { sinkListItem } from "prosemirror-schema-list";
+import { Utils } from "../Utils";
+import { Docs } from "../client/documents/Documents";
+import { schema } from "../client/views/nodes/formattedText/schema_rts";
+import { GooglePhotos } from "../client/apis/google_docs/GooglePhotosClientUtils";
+import { DocServer } from "../client/DocServer";
+import { Networking } from "../client/Network";
+import { FormattedTextBox } from "../client/views/nodes/formattedText/FormattedTextBox";
+import { Doc, Opt } from "./Doc";
+import { Id } from "./FieldSymbols";
+import { RichTextField } from "./RichTextField";
+import { Cast, StrCast } from "./Types";
+import Color = require('color');
+import { EditorState, TextSelection, Transaction } from "prosemirror-state";
+import { GoogleApiClientUtils } from "../client/apis/google_docs/GoogleApiClientUtils";
+
+export namespace RichTextUtils {
+
+    const delimiter = "\n";
+    const joiner = "";
+
+
+    export const Initialize = (initial?: string) => {
+        const content: any[] = [];
+        const state = {
+            doc: {
+                type: "doc",
+                content,
+            },
+            selection: {
+                type: "text",
+                anchor: 0,
+                head: 0
+            }
+        };
+        if (initial && initial.length) {
+            content.push({
+                type: "paragraph",
+                content: {
+                    type: "text",
+                    text: initial
+                }
+            });
+            state.selection.anchor = state.selection.head = initial.length + 1;
+        }
+        return JSON.stringify(state);
+    };
+
+    export const Synthesize = (plainText: string, oldState?: RichTextField) => {
+        return new RichTextField(ToProsemirrorState(plainText, oldState), plainText);
+    };
+
+    export const ToPlainText = (state: EditorState) => {
+        // Because we're working with plain text, just concatenate all paragraphs
+        const content = state.doc.content;
+        const paragraphs: Node<any>[] = [];
+        content.forEach(node => node.type.name === "paragraph" && paragraphs.push(node));
+
+        // Functions to flatten ProseMirror paragraph objects (and their components) to plain text
+        // Concatentate paragraphs and string the result together
+        const textParagraphs: string[] = paragraphs.map(paragraph => {
+            const text: string[] = [];
+            paragraph.content.forEach(node => node.text && text.push(node.text));
+            return text.join(joiner) + delimiter;
+        });
+        const plainText = textParagraphs.join(joiner);
+        return plainText.substring(0, plainText.length - 1);
+    };
+
+    export const ToProsemirrorState = (plainText: string, oldState?: RichTextField) => {
+        // Remap the text, creating blocks split on newlines
+        const elements = plainText.split(delimiter);
+
+        // Google Docs adds in an extra carriage return automatically, so this counteracts it
+        !elements[elements.length - 1].length && elements.pop();
+
+        // Preserve the current state, but re-write the content to be the blocks
+        const parsed = JSON.parse(oldState ? oldState.Data : Initialize());
+        parsed.doc.content = elements.map(text => {
+            const paragraph: any = { type: "paragraph" };
+            text.length && (paragraph.content = [{ type: "text", marks: [], text }]); // An empty paragraph gets treated as a line break
+            return paragraph;
+        });
+
+        // If the new content is shorter than the previous content and selection is unchanged, may throw an out of bounds exception, so we reset it
+        parsed.selection = { type: "text", anchor: 1, head: 1 };
+
+        // Export the ProseMirror-compatible state object we've just built
+        return JSON.stringify(parsed);
+    };
+
+    export namespace GoogleDocs {
+
+        export const Export = async (state: EditorState): Promise<GoogleApiClientUtils.Docs.Content> => {
+            const nodes: (Node<any> | null)[] = [];
+            const text = ToPlainText(state);
+            state.doc.content.forEach(node => {
+                if (!node.childCount) {
+                    nodes.push(null);
+                } else {
+                    node.content.forEach(child => nodes.push(child));
+                }
+            });
+            const requests = await marksToStyle(nodes);
+            return { text, requests };
+        };
+
+        interface ImageTemplate {
+            width: number;
+            title: string;
+            url: string;
+            agnostic: string;
+        }
+
+        const parseInlineObjects = async (document: docs_v1.Schema$Document): Promise<Map<string, ImageTemplate>> => {
+            const inlineObjectMap = new Map<string, ImageTemplate>();
+            const inlineObjects = document.inlineObjects;
+
+            if (inlineObjects) {
+                const objects = Object.keys(inlineObjects).map(objectId => inlineObjects[objectId]);
+                const mediaItems: MediaItem[] = objects.map(object => {
+                    const embeddedObject = object.inlineObjectProperties!.embeddedObject!;
+                    return { baseUrl: embeddedObject.imageProperties!.contentUri! };
+                });
+
+                const uploads = await Networking.PostToServer("/googlePhotosMediaGet", { mediaItems });
+
+                if (uploads.length !== mediaItems.length) {
+                    throw new AssertionError({ expected: mediaItems.length, actual: uploads.length, message: "Error with internally uploading inlineObjects!" });
+                }
+
+                for (let i = 0; i < objects.length; i++) {
+                    const object = objects[i];
+                    const { accessPaths } = uploads[i];
+                    const { agnostic, _m } = accessPaths;
+                    const embeddedObject = object.inlineObjectProperties!.embeddedObject!;
+                    const size = embeddedObject.size!;
+                    const width = size.width!.magnitude!;
+
+                    inlineObjectMap.set(object.objectId!, {
+                        title: embeddedObject.title || `Imported Image from ${document.title}`,
+                        width,
+                        url: Utils.prepend(_m.client),
+                        agnostic: Utils.prepend(agnostic.client)
+                    });
+                }
+            }
+            return inlineObjectMap;
+        };
+
+        type BulletPosition = { value: number, sinks: number };
+
+        interface MediaItem {
+            baseUrl: string;
+        }
+
+        export const Import = async (documentId: GoogleApiClientUtils.Docs.DocumentId, textNote: Doc): Promise<Opt<GoogleApiClientUtils.Docs.ImportResult>> => {
+            const document = await GoogleApiClientUtils.Docs.retrieve({ documentId });
+            if (!document) {
+                return undefined;
+            }
+            const inlineObjectMap = await parseInlineObjects(document);
+            const title = document.title!;
+            const { text, paragraphs } = GoogleApiClientUtils.Docs.Utils.extractText(document);
+            let state = FormattedTextBox.blankState();
+            const structured = parseLists(paragraphs);
+
+            let position = 3;
+            const lists: ListGroup[] = [];
+            const indentMap = new Map<ListGroup, BulletPosition[]>();
+            let globalOffset = 0;
+            const nodes: Node<any>[] = [];
+            for (const element of structured) {
+                if (Array.isArray(element)) {
+                    lists.push(element);
+                    const positions: BulletPosition[] = [];
+                    const items = element.map(paragraph => {
+                        const item = listItem(state.schema, paragraph.contents);
+                        const sinks = paragraph.bullet!;
+                        positions.push({
+                            value: position + globalOffset,
+                            sinks
+                        });
+                        position += item.nodeSize;
+                        globalOffset += 2 * sinks;
+                        return item;
+                    });
+                    indentMap.set(element, positions);
+                    nodes.push(list(state.schema, items));
+                } else {
+                    if (element.contents.some(child => "inlineObjectId" in child)) {
+                        const group = element.contents;
+                        group.forEach((child, i) => {
+                            let node: Opt<Node<any>>;
+                            if ("inlineObjectId" in child) {
+                                node = imageNode(state.schema, inlineObjectMap.get(child.inlineObjectId!)!, textNote);
+                            } else if ("content" in child && (i !== group.length - 1 || child.content!.removeTrailingNewlines().length)) {
+                                node = paragraphNode(state.schema, [child]);
+                            }
+                            if (node) {
+                                position += node.nodeSize;
+                                nodes.push(node);
+                            }
+                        });
+                    } else {
+                        const paragraph = paragraphNode(state.schema, element.contents);
+                        nodes.push(paragraph);
+                        position += paragraph.nodeSize;
+                    }
+                }
+            }
+            state = state.apply(state.tr.replaceWith(0, 2, nodes));
+
+            const sink = sinkListItem(state.schema.nodes.list_item);
+            const dispatcher = (tr: Transaction) => state = state.apply(tr);
+            for (const list of lists) {
+                for (const pos of indentMap.get(list)!) {
+                    const resolved = state.doc.resolve(pos.value);
+                    state = state.apply(state.tr.setSelection(new TextSelection(resolved)));
+                    for (let i = 0; i < pos.sinks; i++) {
+                        sink(state, dispatcher);
+                    }
+                }
+            }
+
+            return { title, text, state };
+        };
+
+        type Paragraph = GoogleApiClientUtils.Docs.Utils.DeconstructedParagraph;
+        type ListGroup = Paragraph[];
+        type PreparedParagraphs = (ListGroup | Paragraph)[];
+
+        const parseLists = (paragraphs: ListGroup) => {
+            const groups: PreparedParagraphs = [];
+            let group: ListGroup = [];
+            for (const paragraph of paragraphs) {
+                if (paragraph.bullet !== undefined) {
+                    group.push(paragraph);
+                } else {
+                    if (group.length) {
+                        groups.push(group);
+                        group = [];
+                    }
+                    groups.push(paragraph);
+                }
+            }
+            group.length && groups.push(group);
+            return groups;
+        };
+
+        const listItem = (schema: any, runs: docs_v1.Schema$TextRun[]): Node => {
+            return schema.node("list_item", null, paragraphNode(schema, runs));
+        };
+
+        const list = (schema: any, items: Node[]): Node => {
+            return schema.node("bullet_list", null, items);
+        };
+
+        const paragraphNode = (schema: any, runs: docs_v1.Schema$TextRun[]): Node => {
+            const children = runs.map(run => textNode(schema, run)).filter(child => child !== undefined);
+            const fragment = children.length ? Fragment.from(children) : undefined;
+            return schema.node("paragraph", null, fragment);
+        };
+
+        const imageNode = (schema: any, image: ImageTemplate, textNote: Doc) => {
+            const { url: src, width, agnostic } = image;
+            let docid: string;
+            const guid = Utils.GenerateDeterministicGuid(agnostic);
+            const backingDocId = StrCast(textNote[guid]);
+            if (!backingDocId) {
+                const backingDoc = Docs.Create.ImageDocument(agnostic, { _width: 300, _height: 300 });
+                Doc.makeCustomViewClicked(backingDoc, Docs.Create.FreeformDocument);
+                docid = backingDoc[Id];
+                textNote[guid] = docid;
+            } else {
+                docid = backingDocId;
+            }
+            return schema.node("image", { src, agnostic, width, docid, float: null, location: "onRight" });
+        };
+
+        const textNode = (schema: any, run: docs_v1.Schema$TextRun) => {
+            const text = run.content!.removeTrailingNewlines();
+            return text.length ? schema.text(text, styleToMarks(schema, run.textStyle)) : undefined;
+        };
+
+        const StyleToMark = new Map<keyof docs_v1.Schema$TextStyle, keyof typeof schema.marks>([
+            ["bold", "strong"],
+            ["italic", "em"],
+            ["foregroundColor", "pFontColor"],
+            ["fontSize", "pFontSize"]
+        ]);
+
+        const styleToMarks = (schema: any, textStyle?: docs_v1.Schema$TextStyle) => {
+            if (!textStyle) {
+                return undefined;
+            }
+            const marks: Mark[] = [];
+            Object.keys(textStyle).forEach(key => {
+                let value: any;
+                const targeted = key as keyof docs_v1.Schema$TextStyle;
+                if (value = textStyle[targeted]) {
+                    const attributes: any = {};
+                    let converted = StyleToMark.get(targeted) || targeted;
+
+                    value.url && (attributes.href = value.url);
+                    if (value.color) {
+                        const object = value.color.rgbColor;
+                        attributes.color = Color.rgb(["red", "green", "blue"].map(color => object[color] * 255 || 0)).hex();
+                    }
+                    if (value.magnitude) {
+                        attributes.fontSize = value.magnitude;
+                    }
+
+                    if (converted === "weightedFontFamily") {
+                        converted = ImportFontFamilyMapping.get(value.fontFamily) || "timesNewRoman";
+                    }
+
+                    const mapped = schema.marks[converted];
+                    if (!mapped) {
+                        alert(`No mapping found for ${converted}!`);
+                        return;
+                    }
+
+                    const mark = schema.mark(mapped, attributes);
+                    mark && marks.push(mark);
+                }
+            });
+            return marks;
+        };
+
+        const MarkToStyle = new Map<keyof typeof schema.marks, keyof docs_v1.Schema$TextStyle>([
+            ["strong", "bold"],
+            ["em", "italic"],
+            ["pFontColor", "foregroundColor"],
+            ["pFontSize", "fontSize"],
+            ["timesNewRoman", "weightedFontFamily"],
+            ["georgia", "weightedFontFamily"],
+            ["comicSans", "weightedFontFamily"],
+            ["tahoma", "weightedFontFamily"],
+            ["impact", "weightedFontFamily"]
+        ]);
+
+        const ExportFontFamilyMapping = new Map<string, string>([
+            ["timesNewRoman", "Times New Roman"],
+            ["arial", "Arial"],
+            ["georgia", "Georgia"],
+            ["comicSans", "Comic Sans MS"],
+            ["tahoma", "Tahoma"],
+            ["impact", "Impact"]
+        ]);
+
+        const ImportFontFamilyMapping = new Map<string, string>([
+            ["Times New Roman", "timesNewRoman"],
+            ["Arial", "arial"],
+            ["Georgia", "georgia"],
+            ["Comic Sans MS", "comicSans"],
+            ["Tahoma", "tahoma"],
+            ["Impact", "impact"]
+        ]);
+
+        const ignored = ["user_mark"];
+
+        const marksToStyle = async (nodes: (Node<any> | null)[]): Promise<docs_v1.Schema$Request[]> => {
+            const requests: docs_v1.Schema$Request[] = [];
+            let position = 1;
+            for (const node of nodes) {
+                if (node === null) {
+                    position += 2;
+                    continue;
+                }
+                const { marks, attrs, nodeSize } = node;
+                const textStyle: docs_v1.Schema$TextStyle = {};
+                const information: LinkInformation = {
+                    startIndex: position,
+                    endIndex: position + nodeSize,
+                    textStyle
+                };
+                let mark: Mark<any>;
+                const markMap = BuildMarkMap(marks);
+                for (const markName of Object.keys(schema.marks)) {
+                    if (ignored.includes(markName) || !(mark = markMap[markName])) {
+                        continue;
+                    }
+                    let converted = MarkToStyle.get(markName) || markName as keyof docs_v1.Schema$TextStyle;
+                    let value: any = true;
+                    if (!converted) {
+                        continue;
+                    }
+                    const { attrs } = mark;
+                    switch (converted) {
+                        case "link":
+                            let url = attrs.href;
+                            const delimiter = "/doc/";
+                            const alreadyShared = "?sharing=true";
+                            if (new RegExp(window.location.origin + delimiter).test(url) && !url.endsWith(alreadyShared)) {
+                                const linkDoc = await DocServer.GetRefField(url.split(delimiter)[1]);
+                                if (linkDoc instanceof Doc) {
+                                    let exported = (await Cast(linkDoc.anchor2, Doc))!;
+                                    if (!exported.customLayout) {
+                                        exported = Doc.MakeAlias(exported);
+                                        Doc.makeCustomViewClicked(exported, Docs.Create.FreeformDocument);
+                                        linkDoc.anchor2 = exported;
+                                    }
+                                    url = Utils.shareUrl(exported[Id]);
+                                }
+                            }
+                            value = { url };
+                            textStyle.foregroundColor = fromRgb.blue;
+                            textStyle.bold = true;
+                            break;
+                        case "fontSize":
+                            value = { magnitude: attrs.fontSize, unit: "PT" };
+                            break;
+                        case "foregroundColor":
+                            value = fromHex(attrs.color);
+                            break;
+                        case "weightedFontFamily":
+                            value = { fontFamily: ExportFontFamilyMapping.get(markName) };
+                    }
+                    let matches: RegExpExecArray | null;
+                    if ((matches = /p(\d+)/g.exec(markName)) !== null) {
+                        converted = "fontSize";
+                        value = { magnitude: parseInt(matches[1].replace("px", "")), unit: "PT" };
+                    }
+                    textStyle[converted] = value;
+                }
+                if (Object.keys(textStyle).length) {
+                    requests.push(EncodeStyleUpdate(information));
+                }
+                if (node.type.name === "image") {
+                    const width = attrs.width;
+                    requests.push(await EncodeImage({
+                        startIndex: position + nodeSize - 1,
+                        uri: attrs.agnostic,
+                        width: Number(typeof width === "string" ? width.replace("px", "") : width)
+                    }));
+                }
+                position += nodeSize;
+            }
+            return requests;
+        };
+
+        const BuildMarkMap = (marks: Mark<any>[]) => {
+            const markMap: { [type: string]: Mark<any> } = {};
+            marks.forEach(mark => markMap[mark.type.name] = mark);
+            return markMap;
+        };
+
+        interface LinkInformation {
+            startIndex: number;
+            endIndex: number;
+            textStyle: docs_v1.Schema$TextStyle;
+        }
+
+        interface ImageInformation {
+            startIndex: number;
+            width: number;
+            uri: string;
+        }
+
+        namespace fromRgb {
+
+            export const convert = (red: number, green: number, blue: number): docs_v1.Schema$OptionalColor => {
+                return {
+                    color: {
+                        rgbColor: {
+                            red: red / 255,
+                            green: green / 255,
+                            blue: blue / 255
+                        }
+                    }
+                };
+            };
+
+            export const red = convert(255, 0, 0);
+            export const green = convert(0, 255, 0);
+            export const blue = convert(0, 0, 255);
+
+        }
+
+        const fromHex = (color: string): docs_v1.Schema$OptionalColor => {
+            const c = Color(color);
+            return fromRgb.convert(c.red(), c.green(), c.blue());
+        };
+
+        const EncodeStyleUpdate = (information: LinkInformation): docs_v1.Schema$Request => {
+            const { startIndex, endIndex, textStyle } = information;
+            return {
+                updateTextStyle: {
+                    fields: "*",
+                    range: { startIndex, endIndex },
+                    textStyle
+                } as docs_v1.Schema$UpdateTextStyleRequest
+            };
+        };
+
+        const EncodeImage = async ({ uri, width, startIndex }: ImageInformation) => {
+            if (!uri) {
+                return {};
+            }
+            const source = [Docs.Create.ImageDocument(uri)];
+            const baseUrls = await GooglePhotos.Transactions.UploadThenFetch(source);
+            if (baseUrls) {
+                return {
+                    insertInlineImage: {
+                        uri: baseUrls[0],
+                        objectSize: { width: { magnitude: width, unit: "PT" } },
+                        location: { index: startIndex }
+                    }
+                };
+            }
+            return {};
+        };
+    }
+
+}
\ No newline at end of file
diff --git a/src/fields/Schema.ts b/src/fields/Schema.ts
new file mode 100644
index 000000000..72bce283d
--- /dev/null
+++ b/src/fields/Schema.ts
@@ -0,0 +1,120 @@
+import { Interface, ToInterface, Cast, ToConstructor, HasTail, Head, Tail, ListSpec, ToType, DefaultFieldConstructor } from "./Types";
+import { Doc, Field } from "./Doc";
+import { ObjectField } from "./ObjectField";
+import { RefField } from "./RefField";
+import { SelfProxy } from "./FieldSymbols";
+
+type AllToInterface<T extends Interface[]> = {
+    1: ToInterface<Head<T>> & AllToInterface<Tail<T>>,
+    0: ToInterface<Head<T>>
+}[HasTail<T> extends true ? 1 : 0];
+
+export const emptySchema = createSchema({});
+export const Document = makeInterface(emptySchema);
+export type Document = makeInterface<[typeof emptySchema]>;
+
+export interface InterfaceFunc<T extends Interface[]> {
+    (docs: Doc[]): makeInterface<T>[];
+    (): makeInterface<T>;
+    (doc: Doc): makeInterface<T>;
+}
+
+export type makeInterface<T extends Interface[]> = AllToInterface<T> & Doc & { proto: Doc | undefined };
+// export function makeInterface<T extends Interface[], U extends Doc>(schemas: T): (doc: U) => All<T, U>;
+// export function makeInterface<T extends Interface, U extends Doc>(schema: T): (doc: U) => makeInterface<T, U>; 
+export function makeInterface<T extends Interface[]>(...schemas: T): InterfaceFunc<T> {
+    const schema: Interface = {};
+    for (const s of schemas) {
+        for (const key in s) {
+            schema[key] = s[key];
+        }
+    }
+    const proto = new Proxy({}, {
+        get(target: any, prop, receiver) {
+            const field = receiver.doc[prop];
+            if (prop in schema) {
+                const desc = prop === "proto" ? Doc : (schema as any)[prop]; // bcz: proto doesn't appear in schemas ... maybe it should?
+                if (typeof desc === "object" && "defaultVal" in desc && "type" in desc) {//defaultSpec
+                    return Cast(field, desc.type, desc.defaultVal);
+                } else if (typeof desc === "function" && !ObjectField.isPrototypeOf(desc) && !RefField.isPrototypeOf(desc)) {
+                    const doc = Cast(field, Doc);
+                    if (doc === undefined) {
+                        return undefined;
+                    } else if (doc instanceof Doc) {
+                        return desc(doc);
+                    } else {
+                        return doc.then(doc => doc && desc(doc));
+                    }
+                } else {
+                    return Cast(field, desc);
+                }
+            }
+            return field;
+        },
+        set(target: any, prop, value, receiver) {
+            receiver.doc[prop] = value;
+            return true;
+        }
+    });
+    const fn = (doc: Doc) => {
+        doc = doc[SelfProxy];
+        // if (!(doc instanceof Doc)) {
+        //     throw new Error("Currently wrapping a schema in another schema isn't supported");
+        // }
+        const obj = Object.create(proto, { doc: { value: doc, writable: false } });
+        return obj;
+    };
+    return function (doc?: Doc | Doc[]) {
+        doc = doc || new Doc;
+        if (doc instanceof Doc) {
+            return fn(doc);
+        } else {
+            return doc.map(fn);
+        }
+    };
+}
+
+export type makeStrictInterface<T extends Interface> = Partial<ToInterface<T>>;
+export function makeStrictInterface<T extends Interface>(schema: T): (doc: Doc) => makeStrictInterface<T> {
+    const proto = {};
+    for (const key in schema) {
+        const type = schema[key];
+        Object.defineProperty(proto, key, {
+            get() {
+                return Cast(this.__doc[key], type as any);
+            },
+            set(value) {
+                value = Cast(value, type as any);
+                if (value !== undefined) {
+                    this.__doc[key] = value;
+                    return;
+                }
+                throw new TypeError("Expected type " + type);
+            }
+        });
+    }
+    return function (doc: any) {
+        if (!(doc instanceof Doc)) {
+            throw new Error("Currently wrapping a schema in another schema isn't supported");
+        }
+        const obj = Object.create(proto);
+        obj.__doc = doc;
+        return obj;
+    };
+}
+
+export function createSchema<T extends Interface>(schema: T): T & { proto: ToConstructor<Doc> } {
+    (schema as any).proto = Doc;
+    return schema as any;
+}
+
+export function listSpec<U extends ToConstructor<Field>>(type: U): ListSpec<ToType<U>> {
+    return { List: type as any };//TODO Types
+}
+
+export function defaultSpec<T extends ToConstructor<Field>>(type: T, defaultVal: ToType<T>): DefaultFieldConstructor<ToType<T>> {
+    return {
+        type: type as any,
+        defaultVal
+    };
+}
\ No newline at end of file
diff --git a/src/fields/SchemaHeaderField.ts b/src/fields/SchemaHeaderField.ts
new file mode 100644
index 000000000..07c90f5a2
--- /dev/null
+++ b/src/fields/SchemaHeaderField.ts
@@ -0,0 +1,122 @@
+import { Deserializable } from "../client/util/SerializationHelper";
+import { serializable, primitive } from "serializr";
+import { ObjectField } from "./ObjectField";
+import { Copy, ToScriptString, ToString, OnUpdate } from "./FieldSymbols";
+import { scriptingGlobal } from "../client/util/Scripting";
+import { ColumnType } from "../client/views/collections/CollectionSchemaView";
+
+export const PastelSchemaPalette = new Map<string, string>([
+    // ["pink1", "#FFB4E8"],
+    ["pink2", "#ff9cee"],
+    ["pink3", "#ffccf9"],
+    ["pink4", "#fcc2ff"],
+    ["pink5", "#f6a6ff"],
+    ["purple1", "#b28dff"],
+    ["purple2", "#c5a3ff"],
+    ["purple3", "#d5aaff"],
+    ["purple4", "#ecd4ff"],
+    // ["purple5", "#fb34ff"],
+    ["purple6", "#dcd3ff"],
+    ["purple7", "#a79aff"],
+    ["purple8", "#b5b9ff"],
+    ["purple9", "#97a2ff"],
+    ["bluegreen1", "#afcbff"],
+    ["bluegreen2", "#aff8db"],
+    ["bluegreen3", "#c4faf8"],
+    ["bluegreen4", "#85e3ff"],
+    ["bluegreen5", "#ace7ff"],
+    // ["bluegreen6", "#6eb5ff"],
+    ["bluegreen7", "#bffcc6"],
+    ["bluegreen8", "#dbffd6"],
+    ["yellow1", "#f3ffe3"],
+    ["yellow2", "#e7ffac"],
+    ["yellow3", "#ffffd1"],
+    ["yellow4", "#fff5ba"],
+    // ["red1", "#ffc9de"],
+    ["red2", "#ffabab"],
+    ["red3", "#ffbebc"],
+    ["red4", "#ffcbc1"],
+    ["orange1", "#ffd5b3"],
+]);
+
+export const RandomPastel = () => Array.from(PastelSchemaPalette.values())[Math.floor(Math.random() * PastelSchemaPalette.size)];
+
+export const DarkPastelSchemaPalette = new Map<string, string>([
+    ["pink2", "#c932b0"],
+    ["purple4", "#913ad6"],
+    ["bluegreen1", "#3978ed"],
+    ["bluegreen7", "#2adb3e"],
+    ["bluegreen5", "#21b0eb"],
+    ["yellow4", "#edcc0c"],
+    ["red2", "#eb3636"],
+    ["orange1", "#f2740f"],
+]);
+
+@scriptingGlobal
+@Deserializable("schemaheader")
+export class SchemaHeaderField extends ObjectField {
+    @serializable(primitive())
+    heading: string;
+    @serializable(primitive())
+    color: string;
+    @serializable(primitive())
+    type: number;
+    @serializable(primitive())
+    width: number;
+    @serializable(primitive())
+    collapsed: boolean | undefined;
+    @serializable(primitive())
+    desc: boolean | undefined; // boolean determines sort order, undefined when no sort
+
+    constructor(heading: string = "", color: string = RandomPastel(), type?: ColumnType, width?: number, desc?: boolean, collapsed?: boolean) {
+        super();
+
+        this.heading = heading;
+        this.color = color;
+        this.type = type ? type : 0;
+        this.width = width ? width : -1;
+        this.desc = desc;
+        this.collapsed = collapsed;
+    }
+
+    setHeading(heading: string) {
+        this.heading = heading;
+        this[OnUpdate]();
+    }
+
+    setColor(color: string) {
+        this.color = color;
+        this[OnUpdate]();
+    }
+
+    setType(type: ColumnType) {
+        this.type = type;
+        this[OnUpdate]();
+    }
+
+    setWidth(width: number) {
+        this.width = width;
+        this[OnUpdate]();
+    }
+
+    setDesc(desc: boolean | undefined) {
+        this.desc = desc;
+        this[OnUpdate]();
+    }
+
+    setCollapsed(collapsed: boolean | undefined) {
+        this.collapsed = collapsed;
+        this[OnUpdate]();
+    }
+
+    [Copy]() {
+        return new SchemaHeaderField(this.heading, this.color, this.type);
+    }
+
+    [ToScriptString]() {
+        return `invalid`;
+    }
+    [ToString]() {
+        return `SchemaHeaderField`;
+    }
+}
\ No newline at end of file
diff --git a/src/fields/ScriptField.ts b/src/fields/ScriptField.ts
new file mode 100644
index 000000000..f05f431ac
--- /dev/null
+++ b/src/fields/ScriptField.ts
@@ -0,0 +1,193 @@
+import { ObjectField } from "./ObjectField";
+import { CompiledScript, CompileScript, scriptingGlobal, ScriptOptions, CompileError, CompileResult } from "../client/util/Scripting";
+import { Copy, ToScriptString, ToString, Parent, SelfProxy } from "./FieldSymbols";
+import { serializable, createSimpleSchema, map, primitive, object, deserialize, PropSchema, custom, SKIP } from "serializr";
+import { Deserializable, autoObject } from "../client/util/SerializationHelper";
+import { Doc, Field } from "./Doc";
+import { Plugins, setter } from "./util";
+import { computedFn } from "mobx-utils";
+import { ProxyField } from "./Proxy";
+import { Cast } from "./Types";
+
+function optional(propSchema: PropSchema) {
+    return custom(value => {
+        if (value !== undefined) {
+            return propSchema.serializer(value);
+        }
+        return SKIP;
+    }, (jsonValue: any, context: any, oldValue: any, callback: (err: any, result: any) => void) => {
+        if (jsonValue !== undefined) {
+            return propSchema.deserializer(jsonValue, callback, context, oldValue);
+        }
+        return SKIP;
+    });
+}
+
+const optionsSchema = createSimpleSchema({
+    requiredType: true,
+    addReturn: true,
+    typecheck: true,
+    editable: true,
+    readonly: true,
+    params: optional(map(primitive()))
+});
+
+const scriptSchema = createSimpleSchema({
+    options: object(optionsSchema),
+    originalScript: true
+});
+
+async function deserializeScript(script: ScriptField) {
+    const captures: ProxyField<Doc> = (script as any).captures;
+    if (captures) {
+        const doc = (await captures.value())!;
+        const captured: any = {};
+        const keys = Object.keys(doc);
+        const vals = await Promise.all(keys.map(key => doc[key]) as any);
+        keys.forEach((key, i) => captured[key] = vals[i]);
+        (script.script.options as any).capturedVariables = captured;
+    }
+    const comp = CompileScript(script.script.originalScript, script.script.options);
+    if (!comp.compiled) {
+        throw new Error("Couldn't compile loaded script");
+    }
+    (script as any).script = comp;
+}
+
+@scriptingGlobal
+@Deserializable("script", deserializeScript)
+export class ScriptField extends ObjectField {
+    @serializable(object(scriptSchema))
+    readonly script: CompiledScript;
+    @serializable(object(scriptSchema))
+    readonly setterscript: CompiledScript | undefined;
+
+    @serializable(autoObject())
+    private captures?: ProxyField<Doc>;
+
+    constructor(script: CompiledScript, setterscript?: CompileResult) {
+        super();
+
+        if (script?.options.capturedVariables) {
+            const doc = Doc.assign(new Doc, script.options.capturedVariables);
+            this.captures = new ProxyField(doc);
+        }
+        this.setterscript = setterscript?.compiled ? setterscript : undefined;
+        this.script = script;
+    }
+
+    //     init(callback: (res: Field) => any) {
+    //         const options = this.options!;
+    //         const keys = Object.keys(options.options.capturedIds);
+    //         Server.GetFields(keys).then(fields => {
+    //             let captured: { [name: string]: Field } = {};
+    //             keys.forEach(key => captured[options.options.capturedIds[key]] = fields[key]);
+    //             const opts: ScriptOptions = {
+    //                 addReturn: options.options.addReturn,
+    //                 params: options.options.params,
+    //                 requiredType: options.options.requiredType,
+    //                 capturedVariables: captured
+    //             };
+    //             const script = CompileScript(options.script, opts);
+    //             if (!script.compiled) {
+    //                 throw new Error("Can't compile script");
+    //             }
+    //             this._script = script;
+    //             callback(this);
+    //         });
+    //     }
+
+    [Copy](): ObjectField {
+        return new ScriptField(this.script);
+    }
+    toString() {
+        return `${this.script.originalScript}`;
+    }
+
+    [ToScriptString]() {
+        return "script field";
+    }
+    [ToString]() {
+        return this.script.originalScript;
+    }
+    public static CompileScript(script: string, params: object = {}, addReturn = false, capturedVariables?: { [name: string]: Field }) {
+        const compiled = CompileScript(script, {
+            params: { this: Doc.name, self: Doc.name, _last_: "any", ...params },
+            typecheck: false,
+            editable: true,
+            addReturn: addReturn,
+            capturedVariables
+        });
+        return compiled;
+    }
+    public static MakeFunction(script: string, params: object = {}, capturedVariables?: { [name: string]: Field }) {
+        const compiled = ScriptField.CompileScript(script, params, true, capturedVariables);
+        return compiled.compiled ? new ScriptField(compiled) : undefined;
+    }
+
+    public static MakeScript(script: string, params: object = {}, capturedVariables?: { [name: string]: Field }) {
+        const compiled = ScriptField.CompileScript(script, params, false, capturedVariables);
+        return compiled.compiled ? new ScriptField(compiled) : undefined;
+    }
+}
+
+@scriptingGlobal
+@Deserializable("computed", deserializeScript)
+export class ComputedField extends ScriptField {
+    _lastComputedResult: any;
+    //TODO maybe add an observable cache based on what is passed in for doc, considering there shouldn't really be that many possible values for doc
+    value = computedFn((doc: Doc) => this._valueOutsideReaction(doc));
+    _valueOutsideReaction = (doc: Doc) => this._lastComputedResult = this.script.run({ this: doc, self: Cast(doc.rootDocument, Doc, null) || doc, _last_: this._lastComputedResult }, console.log).result;
+
+
+    constructor(script: CompiledScript, setterscript?: CompiledScript) {
+        super(script,
+            !setterscript && script?.originalScript.includes("self.timecode") ?
+                ScriptField.CompileScript("self['x' + self.timecode] = value", { value: "any" }, true) : setterscript);
+    }
+
+    public static MakeScript(script: string, params: object = {}) {
+        const compiled = ScriptField.CompileScript(script, params, false);
+        return compiled.compiled ? new ComputedField(compiled) : undefined;
+    }
+    public static MakeFunction(script: string, params: object = {}, capturedVariables?: { [name: string]: Field }, setterScript?: string) {
+        const compiled = ScriptField.CompileScript(script, params, true, capturedVariables);
+        const setCompiled = setterScript ? ScriptField.CompileScript(setterScript, params, true, capturedVariables) : undefined;
+        return compiled.compiled ? new ComputedField(compiled, setCompiled?.compiled ? setCompiled : undefined) : undefined;
+    }
+    public static MakeInterpolated(fieldKey: string, interpolatorKey: string) {
+        const getField = ScriptField.CompileScript(`(self['${fieldKey}-indexed'])[self.${interpolatorKey}]`, {}, true, {});
+        const setField = ScriptField.CompileScript(`(self['${fieldKey}-indexed'])[self.${interpolatorKey}] = value`, { value: "any" }, true, {});
+        return getField.compiled ? new ComputedField(getField, setField?.compiled ? setField : undefined) : undefined;
+    }
+}
+
+export namespace ComputedField {
+    let useComputed = true;
+    export function DisableComputedFields() {
+        useComputed = false;
+    }
+
+    export function EnableComputedFields() {
+        useComputed = true;
+    }
+
+    export const undefined = "__undefined";
+
+    export function WithoutComputed<T>(fn: () => T) {
+        DisableComputedFields();
+        try {
+            return fn();
+        } finally {
+            EnableComputedFields();
+        }
+    }
+
+    export function initPlugin() {
+        Plugins.addGetterPlugin((doc, _, value) => {
+            if (useComputed && value instanceof ComputedField) {
+                return { value: value._valueOutsideReaction(doc), shouldReturn: true };
+            }
+        });
+    }
+}
\ No newline at end of file
diff --git a/src/fields/Types.ts b/src/fields/Types.ts
new file mode 100644
index 000000000..3d784448d
--- /dev/null
+++ b/src/fields/Types.ts
@@ -0,0 +1,108 @@
+import { Field, Opt, FieldResult, Doc } from "./Doc";
+import { List } from "./List";
+import { RefField } from "./RefField";
+import { DateField } from "./DateField";
+import { ScriptField } from "./ScriptField";
+
+export type ToType<T extends InterfaceValue> =
+    T extends "string" ? string :
+    T extends "number" ? number :
+    T extends "boolean" ? boolean :
+    T extends ListSpec<infer U> ? List<U> :
+    // T extends { new(...args: any[]): infer R } ? (R | Promise<R>) : never;
+    T extends DefaultFieldConstructor<infer _U> ? never :
+    T extends { new(...args: any[]): List<Field> } ? never :
+    T extends { new(...args: any[]): infer R } ? R :
+    T extends (doc?: Doc) => infer R ? R : never;
+
+export type ToConstructor<T extends Field> =
+    T extends string ? "string" :
+    T extends number ? "number" :
+    T extends boolean ? "boolean" :
+    T extends List<infer U> ? ListSpec<U> :
+    new (...args: any[]) => T;
+
+export type ToInterface<T extends Interface> = {
+    [P in Exclude<keyof T, "proto">]: T[P] extends DefaultFieldConstructor<infer F> ? Exclude<FieldResult<F>, undefined> : FieldResult<ToType<T[P]>>;
+};
+
+// type ListSpec<T extends Field[]> = { List: ToContructor<Head<T>> | ListSpec<Tail<T>> };
+export type ListSpec<T extends Field> = { List: ToConstructor<T> };
+
+export type DefaultFieldConstructor<T extends Field> = {
+    type: ToConstructor<T>,
+    defaultVal: T
+};
+
+// type ListType<U extends Field[]> = { 0: List<ListType<Tail<U>>>, 1: ToType<Head<U>> }[HasTail<U> extends true ? 0 : 1];
+
+export type Head<T extends any[]> = T extends [any, ...any[]] ? T[0] : never;
+export type Tail<T extends any[]> =
+    ((...t: T) => any) extends ((_: any, ...tail: infer TT) => any) ? TT : [];
+export type HasTail<T extends any[]> = T extends ([] | [any]) ? false : true;
+
+export type InterfaceValue = ToConstructor<Field> | ListSpec<Field> | DefaultFieldConstructor<Field> | ((doc?: Doc) => any);
+//TODO Allow you to optionally specify default values for schemas, which should then make that field not be partial
+export interface Interface {
+    [key: string]: InterfaceValue;
+    // [key: string]: ToConstructor<Field> | ListSpec<Field[]>;
+}
+export type WithoutRefField<T extends Field> = T extends RefField ? never : T;
+
+export type CastCtor = ToConstructor<Field> | ListSpec<Field>;
+
+export function Cast<T extends CastCtor>(field: FieldResult, ctor: T): FieldResult<ToType<T>>;
+export function Cast<T extends CastCtor>(field: FieldResult, ctor: T, defaultVal: WithoutList<WithoutRefField<ToType<T>>> | null): WithoutList<ToType<T>>;
+export function Cast<T extends CastCtor>(field: FieldResult, ctor: T, defaultVal?: ToType<T> | null): FieldResult<ToType<T>> | undefined {
+    if (field instanceof Promise) {
+        return defaultVal === undefined ? field.then(f => Cast(f, ctor) as any) as any : defaultVal === null ? undefined : defaultVal;
+    }
+    if (field !== undefined && !(field instanceof Promise)) {
+        if (typeof ctor === "string") {
+            if (typeof field === ctor) {
+                return field as ToType<T>;
+            }
+        } else if (typeof ctor === "object") {
+            if (field instanceof List) {
+                return field as any;
+            }
+        } else if (field instanceof (ctor as any)) {
+            return field as ToType<T>;
+        }
+    }
+    return defaultVal === null ? undefined : defaultVal;
+}
+
+export function NumCast(field: FieldResult, defaultVal: number | null = 0) {
+    return Cast(field, "number", defaultVal);
+}
+
+export function StrCast(field: FieldResult, defaultVal: string | null = "") {
+    return Cast(field, "string", defaultVal);
+}
+
+export function BoolCast(field: FieldResult, defaultVal: boolean | null = false) {
+    return Cast(field, "boolean", defaultVal);
+}
+export function DateCast(field: FieldResult) {
+    return Cast(field, DateField, null);
+}
+
+export function ScriptCast(field: FieldResult, defaultVal: ScriptField | null = null) {
+    return Cast(field, ScriptField, defaultVal);
+}
+
+type WithoutList<T extends Field> = T extends List<infer R> ? (R extends RefField ? (R | Promise<R>)[] : R[]) : T;
+
+export function FieldValue<T extends Field, U extends WithoutList<T>>(field: FieldResult<T>, defaultValue: U): WithoutList<T>;
+export function FieldValue<T extends Field>(field: FieldResult<T>): Opt<T>;
+export function FieldValue<T extends Field>(field: FieldResult<T>, defaultValue?: T): Opt<T> {
+    return (field instanceof Promise || field === undefined) ? defaultValue : field;
+}
+
+export interface PromiseLike<T> {
+    then(callback: (field: Opt<T>) => void): void;
+}
+export function PromiseValue<T extends Field>(field: FieldResult<T>): PromiseLike<Opt<T>> {
+    return field instanceof Promise ? field : { then(cb: ((field: Opt<T>) => void)) { return cb(field); } };
+}
\ No newline at end of file
diff --git a/src/fields/URLField.ts b/src/fields/URLField.ts
new file mode 100644
index 000000000..fb71160ca
--- /dev/null
+++ b/src/fields/URLField.ts
@@ -0,0 +1,53 @@
+import { Deserializable } from "../client/util/SerializationHelper";
+import { serializable, custom } from "serializr";
+import { ObjectField } from "./ObjectField";
+import { ToScriptString, ToString, Copy } from "./FieldSymbols";
+import { Scripting, scriptingGlobal } from "../client/util/Scripting";
+
+function url() {
+    return custom(
+        function (value: URL) {
+            return value.href;
+        },
+        function (jsonValue: string) {
+            return new URL(jsonValue);
+        }
+    );
+}
+
+export abstract class URLField extends ObjectField {
+    @serializable(url())
+    readonly url: URL;
+
+    constructor(url: string);
+    constructor(url: URL);
+    constructor(url: URL | string) {
+        super();
+        if (typeof url === "string") {
+            url = new URL(url);
+        }
+        this.url = url;
+    }
+
+    [ToScriptString]() {
+        return `new ${this.constructor.name}("${this.url.href}")`;
+    }
+    [ToString]() {
+        return this.url.href;
+    }
+
+    [Copy](): this {
+        return new (this.constructor as any)(this.url);
+    }
+}
+
+export const nullAudio = "https://actions.google.com/sounds/v1/alarms/beep_short.ogg";
+
+@scriptingGlobal @Deserializable("audio") export class AudioField extends URLField { }
+@scriptingGlobal @Deserializable("image") export class ImageField extends URLField { }
+@scriptingGlobal @Deserializable("video") export class VideoField extends URLField { }
+@scriptingGlobal @Deserializable("pdf") export class PdfField extends URLField { }
+@scriptingGlobal @Deserializable("web") export class WebField extends URLField { }
+@scriptingGlobal @Deserializable("youtube") export class YoutubeField extends URLField { }
+@scriptingGlobal @Deserializable("webcam") export class WebCamField extends URLField { }
+
diff --git a/src/fields/documentSchemas.ts b/src/fields/documentSchemas.ts
new file mode 100644
index 000000000..cacba43b6
--- /dev/null
+++ b/src/fields/documentSchemas.ts
@@ -0,0 +1,100 @@
+import { makeInterface, createSchema, listSpec } from "./Schema";
+import { ScriptField } from "./ScriptField";
+import { Doc } from "./Doc";
+import { DateField } from "./DateField";
+
+export const documentSchema = createSchema({
+    // content properties
+    type: "string",             // enumerated type of document -- should be template-specific (ie, start with an '_')
+    title: "string",            // document title (can be on either data document or layout)
+    isTemplateForField: "string",// if specified, it indicates the document is a template that renders the specified field
+    creationDate: DateField,    // when the document was created
+    links: listSpec(Doc),       // computed (readonly) list of links associated with this document
+
+    // "Location" properties in a very general sense
+    currentTimecode: "number",  // current play back time of a temporal document (video / audio)
+    displayTimecode: "number",  // the time that a document should be displayed (e.g., time an annotation should be displayed on a video)
+    inOverlay: "boolean",       // whether the document is rendered in an OverlayView which handles selection/dragging differently
+    x: "number",                // x coordinate when in a freeform view 
+    y: "number",                // y coordinate when in a freeform view 
+    z: "number",                // z "coordinate" - non-zero specifies the overlay layer of a freeformview
+    zIndex: "number",           // zIndex of a document in a freeform view
+    scrollY: "number",          // "command" to scroll a document to a position on load (the value will be reset to 0 after that )
+    scrollTop: "number",        // scroll position of a scrollable document (pdf, text, web)
+
+    // appearance properties on the layout
+    _autoHeight: "boolean",     // whether the height of the document should be computed automatically based on its contents
+    _nativeWidth: "number",     // native width of document which determines how much document contents are scaled when the document's width is set
+    _nativeHeight: "number",    // "
+    _width: "number",           // width of document in its container's coordinate system
+    _height: "number",          // "
+    _xPadding: "number",        // pixels of padding on left/right of collectionfreeformview contents when fitToBox is set
+    _yPadding: "number",        // pixels of padding on top/bottom of collectionfreeformview contents when fitToBox is set
+    _xMargin: "number",         // margin added on left/right of most documents to add separation from their container
+    _yMargin: "number",         // margin added on top/bottom of most documents to add separation from their container
+    _overflow: "string",        // sets overflow behvavior for CollectionFreeForm views
+    _showCaption: "string",     // whether editable caption text is overlayed at the bottom of the document 
+    _showTitle: "string",       // the fieldkey whose contents should be displayed at the top of the document
+    _showTitleHover: "string",  // the showTitle should be shown only on hover
+    _showAudio: "boolean",      // whether to show the audio record icon on documents
+    _freeformLayoutEngine: "string",// the string ID for the layout engine to use to layout freeform view documents
+    _LODdisable: "boolean",     // whether to disbale LOD switching for CollectionFreeFormViews
+    _pivotField: "string",      // specifies which field key should be used as the timeline/pivot axis
+    _replacedChrome: "string",  // what the default chrome is replaced with. Currently only supports the value of 'replaced' for PresBox's.
+    _chromeStatus: "string",    // determines the state of the collection chrome. values allowed are 'replaced', 'enabled', 'disabled', 'collapsed'
+    _fontSize: "number",
+    _fontFamily: "string",
+    _sidebarWidthPercent: "string", // percent of text window width taken up by sidebar
+
+    // appearance properties on the data document
+    backgroundColor: "string",  // background color of document
+    borderRounding: "string",   // border radius rounding of document
+    boxShadow: "string",        // the amount of shadow around the perimeter of a document
+    color: "string",            // foreground color of document
+    fitToBox: "boolean",        // whether freeform view contents should be zoomed/panned to fill the area of the document view
+    fontSize: "string",
+    layout: "string",           // this is the native layout string for the document.  templates can be added using other fields and setting layoutKey below
+    layoutKey: "string",        // holds the field key for the field that actually holds the current lyoat
+    letterSpacing: "string",
+    opacity: "number",          // opacity of document
+    strokeWidth: "number",
+    textTransform: "string",
+    treeViewOpen: "boolean",    //  flag denoting whether the documents sub-tree (contents) is visible or hidden
+    treeViewExpandedView: "string", // name of field whose contents are being displayed as the document's subtree
+    treeViewPreventOpen: "boolean", // ignores the treeViewOpen flag (for allowing a view to not be slaved to other views of the document)
+
+    // interaction and linking properties
+    ignoreClick: "boolean",     // whether documents ignores input clicks (but does not ignore manipulation and other events) 
+    onClick: ScriptField,       // script to run when document is clicked (can be overriden by an onClick prop)
+    onPointerDown: ScriptField, // script to run when document is clicked (can be overriden by an onClick prop)
+    onPointerUp: ScriptField,   // script to run when document is clicked (can be overriden by an onClick prop)
+    onDragStart: ScriptField,   // script to run when document is dragged (without being selected).  the script should return the Doc to be dropped.
+    followLinkLocation: "string",// flag for where to place content when following a click interaction (e.g., onRight, inPlace, inTab, ) 
+    isInPlaceContainer: "boolean",// whether the marked object will display addDocTab() calls that target "inPlace" destinations
+    isLinkButton: "boolean",    // whether document functions as a link follow button to follow the first link on the document when clicked   
+    isBackground: "boolean",    // whether document is a background element and ignores input events (can only select with marquee)
+    lockedPosition: "boolean",  // whether the document can be moved (dragged)
+    lockedTransform: "boolean", // whether the document can be panned/zoomed
+
+    // drag drop properties
+    dragFactory: Doc,           // the document that serves as the "template" for the onDragStart script.  ie, to drag out copies of the dragFactory document.
+    dropAction: "string",       // override specifying what should happen when this document is dropped (can be "alias", "copy", "move")
+    targetDropAction: "string", // allows the target of a drop event to specify the dropAction ("alias", "copy", "move") NOTE: if the document is dropped within the same collection, the dropAction is coerced to 'move'
+    childDropAction: "string",  // specify the override for what should happen when the child of a collection is dragged from it and dropped (can be "alias" or "copy")
+    removeDropProperties: listSpec("string"), // properties that should be removed from the alias/copy/etc of this document when it is dropped
+});
+
+
+export const collectionSchema = createSchema({
+    childLayoutTemplateName: "string", // the name of a template to use to override the layoutKey when rendering a document -- ONLY used in DocHolderBox 
+    childLayoutTemplate: Doc, // layout template to use to render children of a collecion
+    childLayoutString: "string", //layout string to use to render children of a collection
+    childClickedOpenTemplateView: Doc, // layout template to apply to a child when its clicked on in a collection and opened (requires onChildClick or other script to read this value and apply template)
+    dontRegisterChildViews: "boolean", // whether views made of this document are registered so that they can be found when drawing links scrollToLinkID: "string",   // id of link being traversed. allows this doc to scroll/highlight/etc its link anchor. scrollToLinkID should be set to undefined by this doc after it sets up its scroll,etc.
+    onChildClick: ScriptField, // script to run for each child when its clicked
+    onChildDoubleClick: ScriptField, // script to run for each child when its clicked
+    onCheckedClick: ScriptField, // script to run when a checkbox is clicked next to a child in a tree view
+});
+
+export type Document = makeInterface<[typeof documentSchema]>;
+export const Document = makeInterface(documentSchema);
diff --git a/src/fields/util.ts b/src/fields/util.ts
new file mode 100644
index 000000000..a287b0210
--- /dev/null
+++ b/src/fields/util.ts
@@ -0,0 +1,199 @@
+import { UndoManager } from "../client/util/UndoManager";
+import { Doc, Field, FieldResult, UpdatingFromServer, LayoutSym } from "./Doc";
+import { SerializationHelper } from "../client/util/SerializationHelper";
+import { ProxyField, PrefetchProxy } from "./Proxy";
+import { RefField } from "./RefField";
+import { ObjectField } from "./ObjectField";
+import { action, trace } from "mobx";
+import { Parent, OnUpdate, Update, Id, SelfProxy, Self } from "./FieldSymbols";
+import { DocServer } from "../client/DocServer";
+import { ComputedField } from "./ScriptField";
+import { ScriptCast } from "./Types";
+
+function _readOnlySetter(): never {
+    throw new Error("Documents can't be modified in read-only mode");
+}
+
+const tracing = false;
+export function TraceMobx() {
+    tracing && trace();
+}
+
+export interface GetterResult {
+    value: FieldResult;
+    shouldReturn?: boolean;
+}
+export type GetterPlugin = (receiver: any, prop: string | number, currentValue: any) => GetterResult | undefined;
+const getterPlugins: GetterPlugin[] = [];
+
+export namespace Plugins {
+    export function addGetterPlugin(plugin: GetterPlugin) {
+        getterPlugins.push(plugin);
+    }
+}
+
+const _setterImpl = action(function (target: any, prop: string | symbol | number, value: any, receiver: any): boolean {
+    //console.log("-set " + target[SelfProxy].title + "(" + target[SelfProxy][prop] + ")." + prop.toString() + " = " + value);
+    if (SerializationHelper.IsSerializing()) {
+        target[prop] = value;
+        return true;
+    }
+
+    if (typeof prop === "symbol") {
+        target[prop] = value;
+        return true;
+    }
+    if (value !== undefined) {
+        value = value[SelfProxy] || value;
+    }
+    const curValue = target.__fields[prop];
+    if (curValue === value || (curValue instanceof ProxyField && value instanceof RefField && curValue.fieldId === value[Id])) {
+        // TODO This kind of checks correctly in the case that curValue is a ProxyField and value is a RefField, but technically
+        // curValue should get filled in with value if it isn't already filled in, in case we fetched the referenced field some other way
+        return true;
+    }
+    if (value instanceof RefField) {
+        value = new ProxyField(value);
+    }
+    if (value instanceof ObjectField) {
+        if (value[Parent] && value[Parent] !== receiver && !(value instanceof PrefetchProxy)) {
+            throw new Error("Can't put the same object in multiple documents at the same time");
+        }
+        value[Parent] = receiver;
+        value[OnUpdate] = updateFunction(target, prop, value, receiver);
+    }
+    if (curValue instanceof ObjectField) {
+        delete curValue[Parent];
+        delete curValue[OnUpdate];
+    }
+    const writeMode = DocServer.getFieldWriteMode(prop as string);
+    const fromServer = target[UpdatingFromServer];
+    const sameAuthor = fromServer || (receiver.author === Doc.CurrentUserEmail);
+    const writeToDoc = sameAuthor || (writeMode !== DocServer.WriteMode.LiveReadonly);
+    const writeToServer = sameAuthor || (writeMode === DocServer.WriteMode.Default);
+    if (writeToDoc) {
+        if (value === undefined) {
+            delete target.__fields[prop];
+        } else {
+            target.__fields[prop] = value;
+        }
+        if (typeof value === "object" && !(value instanceof ObjectField)) debugger;
+        if (writeToServer) {
+            if (value === undefined) target[Update]({ '$unset': { ["fields." + prop]: "" } });
+            else target[Update]({ '$set': { ["fields." + prop]: value instanceof ObjectField ? SerializationHelper.Serialize(value) : (value === undefined ? null : value) } });
+        } else {
+            DocServer.registerDocWithCachedUpdate(receiver, prop as string, curValue);
+        }
+        UndoManager.AddEvent({
+            redo: () => receiver[prop] = value,
+            undo: () => receiver[prop] = curValue
+        });
+    }
+    return true;
+});
+
+let _setter: (target: any, prop: string | symbol | number, value: any, receiver: any) => boolean = _setterImpl;
+
+export function makeReadOnly() {
+    _setter = _readOnlySetter;
+}
+
+export function makeEditable() {
+    _setter = _setterImpl;
+}
+
+const layoutProps = ["panX", "panY", "width", "height", "nativeWidth", "nativeHeight", "fitWidth", "fitToBox",
+    "LODdisable", "chromeStatus", "viewType", "gridGap", "xMargin", "yMargin", "autoHeight"];
+export function setter(target: any, in_prop: string | symbol | number, value: any, receiver: any): boolean {
+    let prop = in_prop;
+    if (typeof prop === "string" && prop !== "__id" && prop !== "__fields" && (prop.startsWith("_") || layoutProps.includes(prop))) {
+        if (!prop.startsWith("_")) {
+            console.log(prop + " is deprecated - switch to _" + prop);
+            prop = "_" + prop;
+        }
+        if (target.__LAYOUT__) {
+            target.__LAYOUT__[prop] = value;
+            return true;
+        }
+    }
+    if (target.__fields[prop] instanceof ComputedField && target.__fields[prop].setterscript) {
+        return ScriptCast(target.__fields[prop])?.setterscript?.run({ self: target[SelfProxy], this: target[SelfProxy], value }).success ? true : false;
+    }
+    return _setter(target, prop, value, receiver);
+}
+
+export function getter(target: any, in_prop: string | symbol | number, receiver: any): any {
+    let prop = in_prop;
+    if (prop === LayoutSym) {
+        return target.__LAYOUT__;
+    }
+    if (typeof prop === "string" && prop !== "__id" && prop !== "__fields" && (prop.startsWith("_") || layoutProps.includes(prop))) {
+        if (!prop.startsWith("_")) {
+            console.log(prop + " is deprecated - switch to _" + prop);
+            prop = "_" + prop;
+        }
+        if (target.__LAYOUT__) return target.__LAYOUT__[prop];
+    }
+    if (prop === "then") {//If we're being awaited
+        return undefined;
+    }
+    if (typeof prop === "symbol") {
+        return target.__fields[prop] || target[prop];
+    }
+    if (SerializationHelper.IsSerializing()) {
+        return target[prop];
+    }
+    return getFieldImpl(target, prop, receiver);
+}
+
+function getFieldImpl(target: any, prop: string | number, receiver: any, ignoreProto: boolean = false): any {
+    receiver = receiver || target[SelfProxy];
+    let field = target.__fields[prop];
+    for (const plugin of getterPlugins) {
+        const res = plugin(receiver, prop, field);
+        if (res === undefined) continue;
+        if (res.shouldReturn) {
+            return res.value;
+        } else {
+            field = res.value;
+        }
+    }
+    if (field === undefined && !ignoreProto && prop !== "proto") {
+        const proto = getFieldImpl(target, "proto", receiver, true);//TODO tfs: instead of receiver we could use target[SelfProxy]... I don't which semantics we want or if it really matters
+        if (proto instanceof Doc) {
+            return getFieldImpl(proto[Self], prop, receiver, ignoreProto);
+        }
+        return undefined;
+    }
+    return field;
+
+}
+export function getField(target: any, prop: string | number, ignoreProto: boolean = false): any {
+    return getFieldImpl(target, prop, undefined, ignoreProto);
+}
+
+export function deleteProperty(target: any, prop: string | number | symbol) {
+    if (typeof prop === "symbol") {
+        delete target[prop];
+        return true;
+    }
+    target[SelfProxy][prop] = undefined;
+    return true;
+}
+
+export function updateFunction(target: any, prop: any, value: any, receiver: any) {
+    let current = ObjectField.MakeCopy(value);
+    return (diff?: any) => {
+        if (true || !diff) {
+            diff = { '$set': { ["fields." + prop]: SerializationHelper.Serialize(value) } };
+            const oldValue = current;
+            const newValue = ObjectField.MakeCopy(value);
+            current = newValue;
+            UndoManager.AddEvent({
+                redo() { receiver[prop] = newValue; },
+                undo() { receiver[prop] = oldValue; }
+            });
+        }
+        target[Update](diff);
+    };
+}
\ No newline at end of file