From b97e7dcb31f4f8812d86b9b1944b912b544f3824 Mon Sep 17 00:00:00 2001
From: bobzel <zzzman@gmail.com>
Date: Wed, 23 Sep 2020 11:56:35 -0400
Subject: fixed link rendering to be less computationally inefficient

---
 .../collections/collectionFreeForm/CollectionFreeFormLinkView.tsx | 8 +++++---
 .../collectionFreeForm/CollectionFreeFormLinksView.tsx            | 8 +++-----
 2 files changed, 8 insertions(+), 8 deletions(-)

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

diff --git a/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinkView.tsx b/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinkView.tsx
index 79a540210..011e10b88 100644
--- a/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinkView.tsx
+++ b/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinkView.tsx
@@ -122,9 +122,9 @@ export class CollectionFreeFormLinkView extends React.Component<CollectionFreeFo
         return top; //top <= document.documentElement.clientHeight && getComputedStyle(document.documentElement).overflow === "hidden";
     }
 
-    @computed get renderData() {
-        this._start;
-        if (SnappingManager.GetIsDragging() || !this.props.A.ContentDiv || !this.props.B.ContentDiv || !this.props.LinkDocs.length) {
+    @computed.struct get renderData() {
+        this._start; SnappingManager.GetIsDragging();
+        if (!this.props.A.ContentDiv || !this.props.B.ContentDiv || !this.props.LinkDocs.length) {
             return undefined;
         }
         this.props.A.props.ScreenToLocalTransform().transform(this.props.B.props.ScreenToLocalTransform());
@@ -132,6 +132,8 @@ export class CollectionFreeFormLinkView extends React.Component<CollectionFreeFo
         const bcont = this.props.B.ContentDiv.getElementsByClassName("linkAnchorBox-cont");
         const adiv = (acont.length ? acont[0] : this.props.A.ContentDiv);
         const bdiv = (bcont.length ? bcont[0] : this.props.B.ContentDiv);
+        for (let apdiv = adiv; apdiv; apdiv = apdiv.parentElement as any) if ((apdiv as any).hidden) return;
+        for (let apdiv = bdiv; apdiv; apdiv = apdiv.parentElement as any) if ((apdiv as any).hidden) return;
         const a = adiv.getBoundingClientRect();
         const b = bdiv.getBoundingClientRect();
         const atop = this.visibleY(adiv);
diff --git a/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinksView.tsx b/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinksView.tsx
index 1a2421bfd..6a1a41ca7 100644
--- a/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinksView.tsx
+++ b/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinksView.tsx
@@ -1,4 +1,4 @@
-import { computed } from "mobx";
+import { computed, trace } from "mobx";
 import { observer } from "mobx-react";
 import { Doc } from "../../../../fields/Doc";
 import { Id } from "../../../../fields/FieldSymbols";
@@ -10,12 +10,10 @@ import React = require("react");
 import { Utils, emptyFunction } from "../../../../Utils";
 import { DocumentType } from "../../../documents/DocumentTypes";
 import { SnappingManager } from "../../../util/SnappingManager";
-import { Cast } from "../../../../fields/Types";
 
 @observer
 export class CollectionFreeFormLinksView extends React.Component {
-    @computed
-    get uniqueConnections() {
+    @computed get uniqueConnections() {
         const connections = DocumentManager.Instance.LinkedDocumentViews.reduce((drawnPairs, connection) => {
             if (!drawnPairs.reduce((found, drawnPair) => {
                 const match1 = (connection.a === drawnPair.a && connection.b === drawnPair.b);
@@ -37,7 +35,7 @@ export class CollectionFreeFormLinksView extends React.Component {
     }
 
     render() {
-        return SnappingManager.GetIsDragging() ? (null) : <div className="collectionfreeformlinksview-container">
+        return <div className="collectionfreeformlinksview-container">
             <svg className="collectionfreeformlinksview-svgCanvas">
                 {this.uniqueConnections}
             </svg>
-- 
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