Merge pull request #55 from brown-dash/speedups2

Speedups2

1 files changed, 4 insertions, 7 deletions

diff --git a/src/client/views/collections/collectionMulticolumn/CollectionMulticolumnView.tsx b/src/client/views/collections/collectionMulticolumn/CollectionMulticolumnView.tsx
index ec1cbadd5..2bdf92417 100644
--- a/src/client/views/collections/collectionMulticolumn/CollectionMulticolumnView.tsx
+++ b/src/client/views/collections/collectionMulticolumn/CollectionMulticolumnView.tsx
@@ -2,11 +2,9 @@ import { action, computed } from 'mobx';
 import { observer } from 'mobx-react';
 import * as React from "react";
 import { Doc } from '../../../../fields/Doc';
-import { documentSchema } from '../../../../fields/documentSchemas';
 import { List } from '../../../../fields/List';
-import { makeInterface } from '../../../../fields/Schema';
 import { BoolCast, NumCast, ScriptCast, StrCast } from '../../../../fields/Types';
-import { returnFalse, emptyPath, returnEmptyDoclist, emptyFunction } from '../../../../Utils';
+import { emptyFunction, returnFalse } from '../../../../Utils';
 import { DragManager, dropActionType } from '../../../util/DragManager';
 import { Transform } from '../../../util/Transform';
 import { undoBatch } from '../../../util/UndoManager';
@@ -16,8 +14,6 @@ import "./CollectionMulticolumnView.scss";
 import ResizeBar from './MulticolumnResizer';
 import WidthLabel from './MulticolumnWidthLabel';
 
-type MulticolumnDocument = makeInterface<[typeof documentSchema]>;
-const MulticolumnDocument = makeInterface(documentSchema);
 
 interface WidthSpecifier {
     magnitude: number;
@@ -38,7 +34,7 @@ const resolvedUnits = Object.values(DimUnit);
 const resizerWidth = 8;
 
 @observer
-export class CollectionMulticolumnView extends CollectionSubView(MulticolumnDocument) {
+export class CollectionMulticolumnView extends CollectionSubView() {
 
     /**
      * @returns the list of layout documents whose width unit is
@@ -51,7 +47,8 @@ export class CollectionMulticolumnView extends CollectionSubView(MulticolumnDocu
 
     @computed
     private get minimumDim() {
-        return Math.min(...this.ratioDefinedDocs.filter(layout => layout._dimMagnitude).map(layout => NumCast(layout._dimMagnitude)));
+        const ratioDocs = this.ratioDefinedDocs.filter(layout => layout._dimMagnitude);
+        return ratioDocs.length ? Math.min(...ratioDocs.map(layout => NumCast(layout._dimMagnitude))) : 1;
     }
 
     /**