1 files changed, 28 insertions, 4 deletions
diff --git a/src/client/views/DocumentButtonBar.tsx b/src/client/views/DocumentButtonBar.tsx
index 90c6c040c..f61d147cf 100644
--- a/src/client/views/DocumentButtonBar.tsx
+++ b/src/client/views/DocumentButtonBar.tsx
@@ -5,11 +5,11 @@ import { action, computed, observable, runInAction, trace } from 'mobx';
 import { observer } from 'mobx-react';
 import { Doc } from '../../fields/Doc';
 import { RichTextField } from '../../fields/RichTextField';
-import { Cast, NumCast } from '../../fields/Types';
+import { Cast, DocCast, NumCast } from '../../fields/Types';
 import { emptyFunction, returnFalse, setupMoveUpEvents, simulateMouseClick } from '../../Utils';
 import { GoogleAuthenticationManager } from '../apis/GoogleAuthenticationManager';
 import { Pulls, Pushes } from '../apis/google_docs/GoogleApiClientUtils';
-import { Docs } from '../documents/Documents';
+import { Docs, DocUtils } from '../documents/Documents';
 import { DragManager } from '../util/DragManager';
 import { SelectionManager } from '../util/SelectionManager';
 import { SharingManager } from '../util/SharingManager';
@@ -21,12 +21,13 @@ import { Colors } from './global/globalEnums';
 import { LinkPopup } from './linking/LinkPopup';
 import { MetadataEntryMenu } from './MetadataEntryMenu';
 import { DocumentLinksButton } from './nodes/DocumentLinksButton';
-import { DocumentView, DocumentViewInternal, OpenWhereMod } from './nodes/DocumentView';
+import { DocumentView, DocumentViewInternal, OpenWhere, OpenWhereMod } from './nodes/DocumentView';
 import { DashFieldView } from './nodes/formattedText/DashFieldView';
 import { GoogleRef } from './nodes/formattedText/FormattedTextBox';
 import { TemplateMenu } from './TemplateMenu';
 import React = require('react');
 import { DocumentType } from '../documents/DocumentTypes';
+import { FontIconBox } from './nodes/button/FontIconBox';
 const higflyout = require('@hig/flyout');
 export const { anchorPoints } = higflyout;
 export const Flyout = higflyout.default;
@@ -270,6 +271,13 @@ export class DocumentButtonBar extends React.Component<{ views: () => (DocumentV
                             </button>
                         </div>
                     </Tooltip>
+                    <Tooltip title={<div>open linked trail</div>}>
+                        <div className="documentButtonBar-button">
+                            <button style={{ backgroundColor: 'transparent', width: 35, height: 35, display: 'flex', justifyContent: 'center', alignItems: 'center', position: 'relative' }} onPointerDown={this.toggleTrail}>
+                                <FontAwesomeIcon icon="taxi" size="lg" />
+                            </button>
+                        </div>
+                    </Tooltip>
                 </div>
                 <div style={{ width: 25, height: 25 }}>
                     <DocumentLinksButton View={this.view0} AlwaysOn={true} InMenu={true} StartLink={true} />
@@ -483,6 +491,22 @@ export class DocumentButtonBar extends React.Component<{ views: () => (DocumentV
         this._showLinkPopup = !this._showLinkPopup;
         e.stopPropagation();
     };
+    @action
+    toggleTrail = (e: React.PointerEvent) => {
+        const rootView = this.props.views()[0];
+        const rootDoc = rootView?.rootDoc;
+        if (rootDoc) {
+            const anchor = rootView.ComponentView?.getAnchor?.(true) ?? rootDoc;
+            const trail = DocCast(anchor.presTrail) ?? Doc.MakeCopy(DocCast(Doc.UserDoc().emptyTrail), true);
+            if (trail !== anchor.presTrail) {
+                DocUtils.MakeLink({ doc: anchor }, { doc: trail }, 'link trail');
+                anchor.presTrail = trail;
+            }
+            Doc.ActivePresentation = trail;
+            this.props.views().lastElement()?.props.addDocTab(trail, OpenWhere.replaceRight);
+        }
+        e.stopPropagation();
+    };
     render() {
         if (!this.view0) return null;
 
@@ -501,7 +525,7 @@ export class DocumentButtonBar extends React.Component<{ views: () => (DocumentV
                             key="popup"
                             showPopup={this._showLinkPopup}
                             linkCreated={link => (link.linkDisplay = !this.props.views().lastElement()?.rootDoc.isLinkButton)}
-                            linkCreateAnchor={() => this.props.views().lastElement()?.ComponentView?.getAnchor?.()}
+                            linkCreateAnchor={() => this.props.views().lastElement()?.ComponentView?.getAnchor?.(true)}
                             linkFrom={() => this.props.views().lastElement()?.rootDoc}
                         />
                     </div>