added link preview for blue buttons.

8 files changed, 148 insertions, 28 deletions

diff --git a/src/client/util/DragManager.ts b/src/client/util/DragManager.ts
index 91bc51101..417ddf989 100644
--- a/src/client/util/DragManager.ts
+++ b/src/client/util/DragManager.ts
@@ -353,7 +353,7 @@ export namespace DragManager {
             const dragElement = ele.parentNode === dragDiv ? ele : ele.cloneNode(true) as HTMLElement;
             const rect = ele.getBoundingClientRect();
             const scaleX = rect.width / ele.offsetWidth,
-                scaleY = rect.height / ele.offsetHeight;
+                scaleY = ele.offsetHeight ? rect.height / ele.offsetHeight : scaleX;
             elesCont.left = Math.min(rect.left, elesCont.left);
             elesCont.top = Math.min(rect.top, elesCont.top);
             elesCont.right = Math.max(rect.right, elesCont.right);
diff --git a/src/client/views/DocumentButtonBar.tsx b/src/client/views/DocumentButtonBar.tsx
index 8cd1b650e..106b7163e 100644
--- a/src/client/views/DocumentButtonBar.tsx
+++ b/src/client/views/DocumentButtonBar.tsx
@@ -248,7 +248,7 @@ export class DocumentButtonBar extends React.Component<{ views: () => (DocumentV
     get linkButton() {
         const view0 = this.view0;
         const linkCount = view0 && DocListCast(view0.props.Document.links).length;
-        return !view0 || linkCount ? (null) :
+        return !view0 ? (null) :
             <div className="documentButtonBar-button">
                 <div title="Drag(create link) Tap(view links)" className="documentButtonBar-linkFlyout" ref={this._linkButton}>
                     <div className={"documentButtonBar-linkButton-" + (linkCount ? "nonempty" : "empty")}
diff --git a/src/client/views/MainView.tsx b/src/client/views/MainView.tsx
index 374fd7421..4e2c067ac 100644
--- a/src/client/views/MainView.tsx
+++ b/src/client/views/MainView.tsx
@@ -57,6 +57,7 @@ import { FormattedTextBox } from './nodes/formattedText/FormattedTextBox';
 import { DocumentManager } from '../util/DocumentManager';
 import { DocumentLinksButton } from './nodes/DocumentLinksButton';
 import { LinkMenu } from './linking/LinkMenu';
+import { LinkDocPreview } from './nodes/LinkDocPreview';
 
 @observer
 export class MainView extends React.Component {
@@ -581,6 +582,9 @@ export class MainView extends React.Component {
             </GestureOverlay>
             <PreviewCursor />
             {DocumentLinksButton.EditLink ? <LinkMenu location={DocumentLinksButton.EditLinkLoc} docView={DocumentLinksButton.EditLink} addDocTab={DocumentLinksButton.EditLink.props.addDocTab} changeFlyout={emptyFunction} /> : (null)}
+            {LinkDocPreview.LinkInfo ? <LinkDocPreview location={LinkDocPreview.LinkInfo.Location} backgroundColor={this.defaultBackgroundColors}
+                linkDoc={LinkDocPreview.LinkInfo.linkDoc} linkSrc={LinkDocPreview.LinkInfo.linkSrc} href={LinkDocPreview.LinkInfo.href}
+                addDocTab={LinkDocPreview.LinkInfo.addDocTab} /> : (null)}
             <ContextMenu />
             <RadialMenu />
             <PDFMenu />
diff --git a/src/client/views/nodes/DocumentLinksButton.scss b/src/client/views/nodes/DocumentLinksButton.scss
index b4c59b91c..79364ab8e 100644
--- a/src/client/views/nodes/DocumentLinksButton.scss
+++ b/src/client/views/nodes/DocumentLinksButton.scss
@@ -1,21 +1,9 @@
 @import "../globalCssVariables.scss";
 
 
-.documentLinksButton-button-empty:hover {
-    background: $main-accent;
-    transform: scale(1.05);
-    cursor: pointer;
-}
-
-.documentLinksButton-button-nonempty:hover {
-    background: $main-accent;
-    transform: scale(1.05);
-    cursor: pointer;
-}
-
-.documentLinksButton-button,
-.documentLinksButton-button-empty,
-.documentLinksButton-button-nonempty {
+.documentLinksButton,
+.documentLinksButton-endLink,
+.documentLinksButton-startLink {
     height: 20px;
     width: 20px;
     left: -15px;
@@ -34,18 +22,18 @@
     align-items: center;
 
     &:hover {
-        background: $main-accent;
+        background: deepskyblue;
         transform: scale(1.05);
-        cursor: pointer;
+        cursor: default;
     }
 }
-.documentLinksButton-button-nonempty {
+.documentLinksButton {
     background-color: $link-color;
 }
-.documentLinksButton-button-empty {
+.documentLinksButton-endLink {
     border: red solid 2px;
 }
-.documentLinksButton-button {
+.documentLinksButton-startLink {
     border: red solid 2px;
     background-color: rgba(255, 192, 203, 0.5);
 }
\ No newline at end of file
diff --git a/src/client/views/nodes/DocumentLinksButton.tsx b/src/client/views/nodes/DocumentLinksButton.tsx
index c9083a65f..fc314ae8b 100644
--- a/src/client/views/nodes/DocumentLinksButton.tsx
+++ b/src/client/views/nodes/DocumentLinksButton.tsx
@@ -9,6 +9,7 @@ import { DocumentView } from "./DocumentView";
 import React = require("react");
 import { DocUtils } from "../../documents/Documents";
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
+import { LinkDocPreview } from "./LinkDocPreview";
 const higflyout = require("@hig/flyout");
 export const { anchorPoints } = higflyout;
 export const Flyout = higflyout.default;
@@ -80,11 +81,19 @@ export class DocumentLinksButton extends React.Component<DocumentLinksButtonProp
         const links = DocListCast(this.props.View.props.Document.links);
         return !links.length || links[0].hidden ? (null) :
             <div title="Drag(create link) Tap(view links)" ref={this._linkButton}>
-                <div className={"documentLinksButton-button-nonempty"} onPointerDown={this.onLinkButtonDown} >
+                <div className={"documentLinksButton"} style={{ backgroundColor: DocumentLinksButton.StartLink ? "transparent" : "" }}
+                    onPointerDown={this.onLinkButtonDown}
+                    onPointerLeave={action(() => LinkDocPreview.LinkInfo = undefined)}
+                    onPointerEnter={action(e => LinkDocPreview.LinkInfo = {
+                        addDocTab: this.props.View.props.addDocTab,
+                        linkSrc: this.props.View.props.Document,
+                        linkDoc: links[0],
+                        Location: [e.clientX, e.clientY + 20]
+                    })} >
                     {links.length ? links.length : <FontAwesomeIcon className="documentdecorations-icon" icon="link" size="sm" />}
                 </div>
-                {DocumentLinksButton.StartLink && DocumentLinksButton.StartLink !== this.props.View ? <div className={"documentLinksButton-button-empty"} onPointerDown={this.completeLink} /> : (null)}
-                {DocumentLinksButton.StartLink === this.props.View ? <div className={"documentLinksButton-button"} /> : (null)}
+                {DocumentLinksButton.StartLink && DocumentLinksButton.StartLink !== this.props.View ? <div className={"documentLinksButton-endLink"} onPointerDown={this.completeLink} /> : (null)}
+                {DocumentLinksButton.StartLink === this.props.View ? <div className={"documentLinksButton-startLink"} /> : (null)}
             </div>;
     }
     render() {
diff --git a/src/client/views/nodes/DocumentView.tsx b/src/client/views/nodes/DocumentView.tsx
index 20a606937..4cb08bab3 100644
--- a/src/client/views/nodes/DocumentView.tsx
+++ b/src/client/views/nodes/DocumentView.tsx
@@ -1047,7 +1047,7 @@ export class DocumentView extends DocComponent<DocumentViewProps, Document>(Docu
                 onClick={this.onClickHandler}
                 layoutKey={this.finalLayoutKey} />
             {this.layoutDoc.showLinks ? this.anchors : (null)}
-            {this.props.forcedBackgroundColor?.(this.Document) === "transparent" ? (null) : <DocumentLinksButton View={this} />}
+            {this.props.forcedBackgroundColor?.(this.Document) === "transparent" || this.props.dontRegisterView ? (null) : <DocumentLinksButton View={this} />}
         </div>
         );
     }
@@ -1071,7 +1071,7 @@ export class DocumentView extends DocComponent<DocumentViewProps, Document>(Docu
     anchorPanelHeight = () => this.props.PanelHeight() || 1;
     @computed get anchors() {
         TraceMobx();
-        return this.layoutDoc.presBox ? (null) : DocListCast(this.Document.links).filter(d => !d.hidden && this.isNonTemporalLink).map((d, i) =>
+        return this.props.forcedBackgroundColor?.(this.Document) === "transparent" || this.layoutDoc.presBox || this.props.dontRegisterView ? (null) : DocListCast(this.Document.links).filter(d => !d.hidden && this.isNonTemporalLink).map((d, i) =>
             <DocumentView {...this.props} key={i + 1}
                 Document={d}
                 ContainingCollectionView={this.props.ContainingCollectionView}
@@ -1079,6 +1079,7 @@ export class DocumentView extends DocComponent<DocumentViewProps, Document>(Docu
                 PanelWidth={this.anchorPanelWidth}
                 PanelHeight={this.anchorPanelHeight}
                 ContentScaling={returnOne}
+                dontRegisterView={false}
                 forcedBackgroundColor={returnTransparent}
                 removeDocument={this.hideLinkAnchor}
                 pointerEvents={false}
@@ -1202,7 +1203,10 @@ export class DocumentView extends DocComponent<DocumentViewProps, Document>(Docu
                 color: StrCast(this.layoutDoc.color, "inherit"),
                 outline: highlighting && !borderRounding ? `${highlightColors[fullDegree]} ${highlightStyles[fullDegree]} ${localScale}px` : "solid 0px",
                 border: highlighting && borderRounding ? `${highlightStyles[fullDegree]} ${highlightColors[fullDegree]} ${localScale}px` : undefined,
-                boxShadow: this.Document.isLinkButton ? StrCast(this.props.Document._linkButtonShadow, "lightblue 0em 0em 1em") : this.props.Document.isTemplateForField ? "black 0.2vw 0.2vw 0.8vw" : undefined,
+                boxShadow: this.Document.isLinkButton && !this.props.dontRegisterView && this.props.forcedBackgroundColor?.(this.Document) !== "transparent" ?
+                    StrCast(this.props.Document._linkButtonShadow, "lightblue 0em 0em 1em") :
+                    this.props.Document.isTemplateForField ? "black 0.2vw 0.2vw 0.8vw" :
+                        undefined,
                 background: finalColor,
                 opacity: finalOpacity,
                 fontFamily: StrCast(this.Document._fontFamily, "inherit"),
diff --git a/src/client/views/nodes/LinkAnchorBox.tsx b/src/client/views/nodes/LinkAnchorBox.tsx
index 2b64cdab6..2bcc6168b 100644
--- a/src/client/views/nodes/LinkAnchorBox.tsx
+++ b/src/client/views/nodes/LinkAnchorBox.tsx
@@ -18,6 +18,7 @@ import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
 import { SelectionManager } from "../../util/SelectionManager";
 import { TraceMobx } from "../../../fields/util";
 import { Id } from "../../../fields/FieldSymbols";
+import { LinkDocPreview } from "./LinkDocPreview";
 const higflyout = require("@hig/flyout");
 export const { anchorPoints } = higflyout;
 export const Flyout = higflyout.default;
@@ -132,6 +133,13 @@ export class LinkAnchorBox extends ViewBoxBaseComponent<FieldViewProps, LinkAnch
         );
         const small = this.props.PanelWidth() <= 1;
         return <div className={`linkAnchorBox-cont${small ? "-small" : ""} ${this.rootDoc[Id]}`}
+            onPointerLeave={action(() => LinkDocPreview.LinkInfo = undefined)}
+            onPointerEnter={action(e => LinkDocPreview.LinkInfo = {
+                addDocTab: this.props.addDocTab,
+                linkSrc: this.props.ContainingCollectionDoc!,
+                linkDoc: this.rootDoc,
+                Location: [e.clientX, e.clientY + 20]
+            })}
             onPointerDown={this.onPointerDown} onClick={this.onClick} title={targetTitle} onContextMenu={this.specificContextMenu}
             ref={this._ref} style={{
                 background: c,
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>;
+    }
+}
\ No newline at end of file