From ba42ca25ae828b6279f618dea87f7cd37a3b3814 Mon Sep 17 00:00:00 2001
From: Bob Zeleznik <zzzman@gmail.com>
Date: Thu, 25 Jun 2020 00:19:40 -0400
Subject: added link preview for blue buttons.

---
 src/client/views/nodes/LinkDocPreview.tsx | 107 ++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 src/client/views/nodes/LinkDocPreview.tsx

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

diff --git a/src/client/views/nodes/LinkDocPreview.tsx b/src/client/views/nodes/LinkDocPreview.tsx
new file mode 100644
index 000000000..126dc240a
--- /dev/null
+++ b/src/client/views/nodes/LinkDocPreview.tsx
@@ -0,0 +1,107 @@
+import { action, computed, observable, runInAction } from 'mobx';
+import { observer } from "mobx-react";
+import wiki from "wikijs";
+import { Doc, DocCastAsync, HeightSym, Opt, WidthSym } from "../../../fields/Doc";
+import { Cast, FieldValue, NumCast } from "../../../fields/Types";
+import { emptyFunction, emptyPath, returnEmptyFilter, returnFalse, returnOne, returnZero } from "../../../Utils";
+import { Docs } from "../../documents/Documents";
+import { DocumentManager } from "../../util/DocumentManager";
+import { Transform } from "../../util/Transform";
+import { ContentFittingDocumentView } from "./ContentFittingDocumentView";
+import React = require("react");
+import { DocumentView } from './DocumentView';
+
+interface Props {
+    linkDoc?: Doc;
+    linkSrc?: Doc;
+    href?: string;
+    backgroundColor: (doc: Doc) => string;
+    addDocTab: (document: Doc, where: string) => boolean;
+    location: number[];
+}
+@observer
+export class LinkDocPreview extends React.Component<Props> {
+    @observable public static LinkInfo: Opt<{ linkDoc?: Doc; addDocTab: (document: Doc, where: string) => boolean, linkSrc: Doc; href?: string; Location: number[] }>;
+    @observable _targetDoc: Opt<Doc>;
+    @observable _toolTipText = "";
+
+    componentDidUpdate() { this.updatePreview() }
+    componentDidMount() { this.updatePreview() }
+    async updatePreview() {
+        const linkDoc = this.props.linkDoc;
+        const linkSrc = this.props.linkSrc;
+        if (this.props.href) {
+            if (this.props.href.startsWith("https://en.wikipedia.org/wiki/")) {
+                wiki().page(this.props.href.replace("https://en.wikipedia.org/wiki/", "")).then(page => page.summary().then(action(summary => this._toolTipText = summary.substring(0, 500))));
+            } else {
+                runInAction(() => this._toolTipText = "external => " + this.props.href);
+            }
+        } else if (linkDoc && linkSrc) {
+            const anchor = FieldValue(Doc.AreProtosEqual(FieldValue(Cast(linkDoc.anchor1, Doc)), linkSrc) ? Cast(linkDoc.anchor2, Doc) : (Cast(linkDoc.anchor1, Doc)) || linkDoc);
+            const target = anchor?.annotationOn ? await DocCastAsync(anchor.annotationOn) : anchor;
+            runInAction(() => {
+                this._toolTipText = "";
+                this._targetDoc = target;
+                if (anchor !== this._targetDoc && anchor && this._targetDoc) {
+                    this._targetDoc._scrollY = NumCast(anchor?.y);
+                }
+            });
+        }
+    }
+    pointerDown = (e: React.PointerEvent) => {
+        if (this.props.linkDoc && this.props.linkSrc) {
+            DocumentManager.Instance.FollowLink(this.props.linkDoc, this.props.linkSrc,
+                (doc: Doc, followLinkLocation: string) => this.props.addDocTab(doc, e.ctrlKey ? "inTab" : followLinkLocation));
+        } else if (this.props.href) {
+            this.props.addDocTab(Docs.Create.WebDocument(this.props.href, { title: this.props.href, _width: 200, _height: 400, UseCors: true }), "onRight");
+        }
+    }
+    width = () => Math.min(350, NumCast(this._targetDoc?.[WidthSym](), 350));
+    height = () => Math.min(350, NumCast(this._targetDoc?.[HeightSym](), 350));
+    @computed get targetDocView() {
+        return !this._targetDoc ?
+            <div style={{ pointerEvents: "all", maxWidth: 350, maxHeight: 250, width: "100%", height: "100%", overflow: "hidden" }}>
+                <div style={{ width: "100%", height: "100%", textOverflow: "ellipsis", }} onPointerDown={this.pointerDown}>
+                    {this._toolTipText}
+                </div>
+            </div> :
+            <ContentFittingDocumentView
+                Document={this._targetDoc}
+                LibraryPath={emptyPath}
+                fitToBox={true}
+                backgroundColor={this.props.backgroundColor}
+                moveDocument={returnFalse}
+                rootSelected={returnFalse}
+                ScreenToLocalTransform={Transform.Identity}
+                parentActive={returnFalse}
+                addDocument={returnFalse}
+                removeDocument={returnFalse}
+                addDocTab={returnFalse}
+                pinToPres={returnFalse}
+                dontRegisterView={true}
+                docFilters={returnEmptyFilter}
+                ContainingCollectionDoc={undefined}
+                ContainingCollectionView={undefined}
+                renderDepth={0}
+                PanelWidth={this.width}
+                PanelHeight={this.height}
+                focus={emptyFunction}
+                whenActiveChanged={returnFalse}
+                bringToFront={returnFalse}
+                ContentScaling={returnOne}
+                NativeWidth={returnZero}
+                NativeHeight={returnZero}
+            />;
+    }
+
+    render() {
+        return <div className="linkDocPreview"
+            style={{
+                position: "absolute", left: this.props.location[0],
+                top: this.props.location[1], width: this.width(), height: this.height(),
+                boxShadow: "black 2px 2px 1em"
+            }}>
+            {this.targetDocView}
+        </div>;
+    }
+}
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