From a4b34adcb34184728be0b69b33a561f6d10f0a98 Mon Sep 17 00:00:00 2001
From: Fawn <fangrui_tong@brown.edu>
Date: Fri, 21 Jun 2019 16:27:03 -0400
Subject: can drag just a group of links on a doc

---
 src/client/views/nodes/LinkMenuGroup.tsx | 74 ++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 src/client/views/nodes/LinkMenuGroup.tsx

(limited to 'src/client/views/nodes/LinkMenuGroup.tsx')

diff --git a/src/client/views/nodes/LinkMenuGroup.tsx b/src/client/views/nodes/LinkMenuGroup.tsx
new file mode 100644
index 000000000..229143d99
--- /dev/null
+++ b/src/client/views/nodes/LinkMenuGroup.tsx
@@ -0,0 +1,74 @@
+import { action, observable } from "mobx";
+import { observer } from "mobx-react";
+import { DocumentView } from "./DocumentView";
+import { LinkMenuItem } from "./LinkMenuItem";
+import { LinkEditor } from "./LinkEditor";
+import './LinkMenu.scss';
+import React = require("react");
+import { Doc, DocListCast } from "../../../new_fields/Doc";
+import { Id } from "../../../new_fields/FieldSymbols";
+import { LinkManager } from "../../util/LinkManager";
+import { DragLinksAsDocuments, DragManager } from "../../util/DragManager";
+import { emptyFunction } from "../../../Utils";
+
+interface LinkMenuGroupProps {
+    sourceDoc: Doc;
+    group: Doc[];
+    groupType: string;
+    showEditor: (linkDoc: Doc) => void;
+}
+
+@observer
+export class LinkMenuGroup extends React.Component<LinkMenuGroupProps> {
+
+    private _drag = React.createRef<HTMLDivElement>();
+
+    onLinkButtonDown = (e: React.PointerEvent): void => {
+        e.stopPropagation();
+        document.removeEventListener("pointermove", this.onLinkButtonMoved);
+        document.addEventListener("pointermove", this.onLinkButtonMoved);
+        document.removeEventListener("pointerup", this.onLinkButtonUp);
+        document.addEventListener("pointerup", this.onLinkButtonUp);
+    }
+
+    onLinkButtonUp = (e: PointerEvent): void => {
+        document.removeEventListener("pointermove", this.onLinkButtonMoved);
+        document.removeEventListener("pointerup", this.onLinkButtonUp);
+        e.stopPropagation();
+    }
+
+    onLinkButtonMoved = async (e: PointerEvent) => {
+        if (this._drag.current !== null && (e.movementX > 1 || e.movementY > 1)) {
+            document.removeEventListener("pointermove", this.onLinkButtonMoved);
+            document.removeEventListener("pointerup", this.onLinkButtonUp);
+
+            let draggedDocs = this.props.group.map(linkDoc => LinkManager.Instance.findOppositeAnchor(linkDoc, this.props.sourceDoc));
+            let dragData = new DragManager.DocumentDragData(draggedDocs);
+
+            DragManager.StartLinkedDocumentDrag([this._drag.current], dragData, e.x, e.y, {
+                handlers: {
+                    dragComplete: action(emptyFunction),
+                },
+                hideSource: false
+            });
+        }
+        e.stopPropagation();
+    }
+
+    render() {
+        let groupItems = this.props.group.map(linkDoc => {
+            let destination = LinkManager.Instance.findOppositeAnchor(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} />;
+        });
+
+        return (
+            <div className="linkMenu-group">
+                <p className="linkMenu-group-name" ref={this._drag} onPointerDown={this.onLinkButtonDown} >{this.props.groupType}:</p>
+                <div className="linkMenu-group-wrapper">
+                    {groupItems}
+                </div>
+            </div>
+        )
+    }
+}
\ No newline at end of file
-- 
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