From b0bb28202fa77556768d1da93bf9ea879c6ba2e5 Mon Sep 17 00:00:00 2001
From: bobzel <zzzman@gmail.com>
Date: Thu, 10 Apr 2025 12:05:55 -0400
Subject: performance fixes for text boxes to not call screenToLocal
 unnecessarily.  simplifications to template data docs

---
 .../CollectionMulticolumnView.tsx                  | 106 ++++++++++-----------
 1 file changed, 53 insertions(+), 53 deletions(-)

(limited to 'src/client/views/collections/collectionMulticolumn/CollectionMulticolumnView.tsx')

diff --git a/src/client/views/collections/collectionMulticolumn/CollectionMulticolumnView.tsx b/src/client/views/collections/collectionMulticolumn/CollectionMulticolumnView.tsx
index f27398427..42b093cc7 100644
--- a/src/client/views/collections/collectionMulticolumn/CollectionMulticolumnView.tsx
+++ b/src/client/views/collections/collectionMulticolumn/CollectionMulticolumnView.tsx
@@ -6,7 +6,7 @@ import { observer } from 'mobx-react';
 import * as React from 'react';
 import { FaChevronRight } from 'react-icons/fa';
 import { Doc, DocListCast } from '../../../../fields/Doc';
-import { BoolCast, DocCast, NumCast, ScriptCast, StrCast } from '../../../../fields/Types';
+import { BoolCast, NumCast, ScriptCast, StrCast } from '../../../../fields/Types';
 import { DragManager } from '../../../util/DragManager';
 import { SettingsManager } from '../../../util/SettingsManager';
 import { Transform } from '../../../util/Transform';
@@ -18,7 +18,7 @@ import ResizeBar from './MulticolumnResizer';
 import WidthLabel from './MulticolumnWidthLabel';
 import { dropActionType } from '../../../util/DropActionTypes';
 import { SnappingManager } from '../../../util/SnappingManager';
-import { DocData } from '../../../../fields/DocSymbols';
+import { computedFn } from 'mobx-utils';
 
 interface WidthSpecifier {
     magnitude: number;
@@ -198,15 +198,14 @@ export class CollectionMulticolumnView extends CollectionSubView() {
      * documents before the target.
      */
     private lookupIndividualTransform = (layout: Doc) => {
-        if (this.columnUnitLength === undefined) {
-            return Transform.Identity(); // we're still waiting on promises to resolve
-        }
-        let offset = 0;
-        for (const { layout: candidate } of this.childLayoutPairs) {
-            if (candidate === layout) {
-                return this.ScreenToLocalBoxXf().translate(-offset / (this._props.NativeDimScaling?.() || 1), 0);
+        if (this.columnUnitLength !== undefined) {
+            let offset = 0;
+            for (const { layout: candidate } of this.childLayoutPairs) {
+                if (candidate === layout) {
+                    return this.ScreenToLocalBoxXf().translate(-offset / (this._props.NativeDimScaling?.() || 1), 0);
+                }
+                offset += this.lookupPixels(candidate) + resizerWidth;
             }
-            offset += this.lookupPixels(candidate) + resizerWidth;
         }
         return Transform.Identity();
     };
@@ -262,50 +261,51 @@ export class CollectionMulticolumnView extends CollectionSubView() {
               ? true
               : undefined;
     };
-    getDisplayDoc = (childLayout: Doc) => {
-        const width = () => this.lookupPixels(childLayout);
-        const height = () => this._props.PanelHeight() - 2 * NumCast(this.layoutDoc._yMargin) - (BoolCast(this.layoutDoc.showWidthLabels) ? 20 : 0);
-        const dxf = () =>
-            this.lookupIndividualTransform(childLayout)
+    childHeight = () => this._props.PanelHeight() - 2 * NumCast(this.layoutDoc._yMargin) - (BoolCast(this.layoutDoc.showWidthLabels) ? 20 : 0);
+    childWidth = computedFn((childDoc: Doc) => () => this.lookupPixels(childDoc));
+    childXf = computedFn(
+        (childDoc: Doc) => () =>
+            this.lookupIndividualTransform(childDoc)
                 .translate(-NumCast(this.layoutDoc._xMargin), -NumCast(this.layoutDoc._yMargin))
-                .scale(this._props.NativeDimScaling?.() || 1);
-        return (
-            <DocumentView
-                Document={childLayout}
-                TemplateDataDocument={DocCast(childLayout.rootDocument)?.[DocData]}
-                styleProvider={this._props.styleProvider}
-                containerViewPath={this.childContainerViewPath}
-                LayoutTemplate={this._props.childLayoutTemplate}
-                LayoutTemplateString={this._props.childLayoutString}
-                renderDepth={this._props.renderDepth + 1}
-                PanelWidth={width}
-                PanelHeight={height}
-                rootSelected={this.rootSelected}
-                dragAction={StrCast(this.Document.childDragAction, this._props.childDragAction) as dropActionType}
-                onClickScript={this.onChildClickHandler}
-                onDoubleClickScript={this.onChildDoubleClickHandler}
-                suppressSetHeight
-                ScreenToLocalTransform={dxf}
-                isContentActive={this.isChildContentActive}
-                isDocumentActive={this._props.childDocumentsActive?.() || this.Document._childDocumentsActive ? this._props.isDocumentActive : this.isContentActive}
-                hideResizeHandles={!!(childLayout.layout_fitWidth || this._props.childHideResizeHandles)}
-                hideDecorationTitle={this._props.childHideDecorationTitle}
-                fitContentsToBox={this._props.fitContentsToBox}
-                focus={this._props.focus}
-                childFilters={this.childDocFilters}
-                childFiltersByRanges={this.childDocRangeFilters}
-                searchFilterDocs={this.searchFilterDocs}
-                dontRegisterView={this._props.dontRegisterView}
-                addDocument={this._props.addDocument}
-                moveDocument={this._props.moveDocument}
-                removeDocument={this._props.removeDocument}
-                whenChildContentsActiveChanged={this._props.whenChildContentsActiveChanged}
-                addDocTab={this._props.addDocTab}
-                pinToPres={this._props.pinToPres}
-                dontCenter={StrCast(this.layoutDoc.layout_dontCenter) as 'x' | 'y' | 'xy'}
-            />
-        );
-    };
+                .scale(this._props.NativeDimScaling?.() || 1)
+    );
+    getDisplayDoc = (childLayout: Doc) => (
+        <DocumentView
+            Document={childLayout}
+            TemplateDataDocument={childLayout.isTemplateDoc || childLayout.isTemplateForField ? this._props.TemplateDataDocument : undefined}
+            styleProvider={this._props.styleProvider}
+            containerViewPath={this.childContainerViewPath}
+            LayoutTemplate={this._props.childLayoutTemplate}
+            LayoutTemplateString={this._props.childLayoutString}
+            renderDepth={this._props.renderDepth + 1}
+            PanelWidth={this.childWidth(childLayout)}
+            PanelHeight={this.childHeight}
+            rootSelected={this.rootSelected}
+            dragAction={StrCast(this.Document.childDragAction, this._props.childDragAction) as dropActionType}
+            onClickScript={this.onChildClickHandler}
+            onDoubleClickScript={this.onChildDoubleClickHandler}
+            suppressSetHeight
+            ScreenToLocalTransform={this.childXf(childLayout)}
+            isContentActive={this.isChildContentActive}
+            isDocumentActive={this._props.childDocumentsActive?.() || this.Document._childDocumentsActive ? this._props.isDocumentActive : this.isContentActive}
+            hideResizeHandles={!!(childLayout.layout_fitWidth || this._props.childHideResizeHandles)}
+            hideDecorationTitle={this._props.childHideDecorationTitle}
+            fitContentsToBox={this._props.fitContentsToBox}
+            focus={this._props.focus}
+            childFilters={this.childDocFilters}
+            childFiltersByRanges={this.childDocRangeFilters}
+            searchFilterDocs={this.searchFilterDocs}
+            dontRegisterView={this._props.dontRegisterView}
+            addDocument={this._props.addDocument}
+            moveDocument={this._props.moveDocument}
+            removeDocument={this._props.removeDocument}
+            whenChildContentsActiveChanged={this._props.whenChildContentsActiveChanged}
+            addDocTab={this._props.addDocTab}
+            pinToPres={this._props.pinToPres}
+            dontCenter={StrCast(this.layoutDoc.layout_dontCenter) as 'x' | 'y' | 'xy'}
+        />
+    );
+
     /**
      * @returns the resolved list of rendered child documents, displayed
      * at their resolved pixel widths, each separated by a resizer.
-- 
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