From a69a43015ec414bd1a9577c03fbeb5c3b27fb55f Mon Sep 17 00:00:00 2001
From: yipstanley <stanley_yip@brown.edu>
Date: Thu, 11 Jul 2019 12:36:34 -0400
Subject: fixes

---
 src/client/views/nodes/LinkEditor.tsx    | 37 +++++++++++++++++++-------------
 src/client/views/nodes/LinkMenuGroup.tsx | 16 +++++++++++---
 src/client/views/nodes/PDFBox.tsx        |  8 ++++---
 3 files changed, 40 insertions(+), 21 deletions(-)

(limited to 'src/client/views/nodes')

diff --git a/src/client/views/nodes/LinkEditor.tsx b/src/client/views/nodes/LinkEditor.tsx
index a97ec8831..df56a19d0 100644
--- a/src/client/views/nodes/LinkEditor.tsx
+++ b/src/client/views/nodes/LinkEditor.tsx
@@ -200,7 +200,9 @@ export class LinkGroupEditor extends React.Component<LinkGroupEditorProps> {
         destGroupDoc.type = groupType;
         destGroupDoc.metadata = destMdDoc;
 
-        LinkManager.Instance.addGroupToAnchor(this.props.linkDoc, destDoc, destGroupDoc, true);
+        if (destDoc) {
+            LinkManager.Instance.addGroupToAnchor(this.props.linkDoc, destDoc, destGroupDoc, true);
+        }
     }
 
     @action
@@ -308,7 +310,10 @@ export class LinkEditor extends React.Component<LinkEditorProps> {
         // create new metadata document for group
         let mdDoc = new Doc();
         mdDoc.anchor1 = this.props.sourceDoc.title;
-        mdDoc.anchor2 = LinkManager.Instance.getOppositeAnchor(this.props.linkDoc, this.props.sourceDoc).title;
+        let opp = LinkManager.Instance.getOppositeAnchor(this.props.linkDoc, this.props.sourceDoc);
+        if (opp) {
+            mdDoc.anchor2 = opp.title;
+        }
 
         // create new group document
         let groupDoc = new Doc();
@@ -326,20 +331,22 @@ export class LinkEditor extends React.Component<LinkEditorProps> {
             return <LinkGroupEditor key={"gred-" + StrCast(groupDoc.type)} linkDoc={this.props.linkDoc} sourceDoc={this.props.sourceDoc} groupDoc={groupDoc} />;
         });
 
-        return (
-            <div className="linkEditor">
-                <button className="linkEditor-back" onPointerDown={() => this.props.showLinks()}><FontAwesomeIcon icon="arrow-left" size="sm" /></button>
-                <div className="linkEditor-info">
-                    <p className="linkEditor-linkedTo">editing link to: <b>{destination.proto!.title}</b></p>
-                    <button className="linkEditor-button" onPointerDown={() => this.deleteLink()} title="Delete link"><FontAwesomeIcon icon="trash" size="sm" /></button>
-                </div>
-                <div className="linkEditor-groupsLabel">
-                    <b>Relationships:</b>
-                    <button className="linkEditor-button" onClick={() => this.addGroup()} title=" Add Group"><FontAwesomeIcon icon="plus" size="sm" /></button>
+        if (destination) {
+            return (
+                <div className="linkEditor">
+                    <button className="linkEditor-back" onPointerDown={() => this.props.showLinks()}><FontAwesomeIcon icon="arrow-left" size="sm" /></button>
+                    <div className="linkEditor-info">
+                        <p className="linkEditor-linkedTo">editing link to: <b>{destination.proto!.title}</b></p>
+                        <button className="linkEditor-button" onPointerDown={() => this.deleteLink()} title="Delete link"><FontAwesomeIcon icon="trash" size="sm" /></button>
+                    </div>
+                    <div className="linkEditor-groupsLabel">
+                        <b>Relationships:</b>
+                        <button className="linkEditor-button" onClick={() => this.addGroup()} title=" Add Group"><FontAwesomeIcon icon="plus" size="sm" /></button>
+                    </div>
+                    {groups.length > 0 ? groups : <div className="linkEditor-group">There are currently no relationships associated with this link.</div>}
                 </div>
-                {groups.length > 0 ? groups : <div className="linkEditor-group">There are currently no relationships associated with this link.</div>}
-            </div>
 
-        );
+            );
+        }
     }
 }
\ No newline at end of file
diff --git a/src/client/views/nodes/LinkMenuGroup.tsx b/src/client/views/nodes/LinkMenuGroup.tsx
index e4cf56d20..97f2e13ae 100644
--- a/src/client/views/nodes/LinkMenuGroup.tsx
+++ b/src/client/views/nodes/LinkMenuGroup.tsx
@@ -45,7 +45,15 @@ export class LinkMenuGroup extends React.Component<LinkMenuGroupProps> {
             document.removeEventListener("pointermove", this.onLinkButtonMoved);
             document.removeEventListener("pointerup", this.onLinkButtonUp);
 
-            let draggedDocs = this.props.group.map(linkDoc => LinkManager.Instance.getOppositeAnchor(linkDoc, this.props.sourceDoc));
+            let draggedDocs: Doc[] = [];
+            this.props.group.forEach(
+                (doc: Doc) => {
+                    let opp = LinkManager.Instance.getOppositeAnchor(doc, this.props.sourceDoc);
+                    if (opp) {
+                        draggedDocs.push(opp);
+                    }
+                }
+            )
             let dragData = new DragManager.DocumentDragData(draggedDocs, draggedDocs.map(d => undefined));
 
             DragManager.StartLinkedDocumentDrag([this._drag.current], this.props.sourceDoc, dragData, e.x, e.y, {
@@ -72,8 +80,10 @@ export class LinkMenuGroup extends React.Component<LinkMenuGroupProps> {
     render() {
         let groupItems = this.props.group.map(linkDoc => {
             let destination = LinkManager.Instance.getOppositeAnchor(linkDoc, this.props.sourceDoc);
-            return <LinkMenuItem key={destination[Id] + this.props.sourceDoc[Id]} groupType={this.props.groupType}
-                linkDoc={linkDoc} sourceDoc={this.props.sourceDoc} destinationDoc={destination} showEditor={this.props.showEditor} />;
+            if (destination) {
+                return <LinkMenuItem key={destination[Id] + this.props.sourceDoc[Id]} groupType={this.props.groupType}
+                    linkDoc={linkDoc} sourceDoc={this.props.sourceDoc} destinationDoc={destination} showEditor={this.props.showEditor} />;
+            }
         });
 
         return (
diff --git a/src/client/views/nodes/PDFBox.tsx b/src/client/views/nodes/PDFBox.tsx
index cc02bb282..2ff5c089f 100644
--- a/src/client/views/nodes/PDFBox.tsx
+++ b/src/client/views/nodes/PDFBox.tsx
@@ -23,9 +23,11 @@ import { CompileScript } from '../../util/Scripting';
 import { Flyout, anchorPoints } from '../DocumentDecorations';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 import { ScriptField } from '../../../new_fields/ScriptField';
+import { KeyCodes } from '../../northstar/utils/KeyCodes';
 
 type PdfDocument = makeInterface<[typeof positionSchema, typeof pageSchema]>;
 const PdfDocument = makeInterface(positionSchema, pageSchema);
+export const handleBackspace = (e: React.KeyboardEvent) => { if (e.keyCode === KeyCodes.BACKSPACE) e.stopPropagation() }
 
 @observer
 export class PDFBox extends DocComponent<FieldViewProps, PdfDocument>(PdfDocument) {
@@ -175,13 +177,13 @@ export class PDFBox extends DocComponent<FieldViewProps, PdfDocument>(PdfDocumen
                             Annotation View Settings
                         </div>
                         <div className="pdfBox-settingsFlyout-kvpInput">
-                            <input placeholder="Key" className="pdfBox-settingsFlyout-input" onChange={this.newKeyChange}
+                            <input placeholder="Key" className="pdfBox-settingsFlyout-input" onKeyDown={handleBackspace} onChange={this.newKeyChange}
                                 style={{ gridColumn: 1 }} ref={this._keyRef} />
-                            <input placeholder="Value" className="pdfBox-settingsFlyout-input" onChange={this.newValueChange}
+                            <input placeholder="Value" className="pdfBox-settingsFlyout-input" onKeyDown={handleBackspace} onChange={this.newValueChange}
                                 style={{ gridColumn: 3 }} ref={this._valueRef} />
                         </div>
                         <div className="pdfBox-settingsFlyout-kvpInput">
-                            <input placeholder="Custom Script" onChange={this.newScriptChange} style={{ gridColumn: "1 / 4" }} ref={this._scriptRef} />
+                            <input placeholder="Custom Script" onChange={this.newScriptChange} onKeyDown={handleBackspace} style={{ gridColumn: "1 / 4" }} ref={this._scriptRef} />
                         </div>
                         <div className="pdfBox-settingsFlyout-kvpInput">
                             <button style={{ gridColumn: 1 }} onClick={this.resetFilters}>
-- 
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