import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
import { action, computed, IReactionDisposer, observable, ObservableMap, reaction, runInAction } from "mobx";
import { observer } from "mobx-react";
import * as WebRequest from 'web-request';
import { Doc, DocListCast, HeightSym, Opt, WidthSym } from "../../../fields/Doc";
import { documentSchema } from "../../../fields/documentSchemas";
import { Id } from "../../../fields/FieldSymbols";
import { HtmlField } from "../../../fields/HtmlField";
import { InkTool } from "../../../fields/InkField";
import { List } from "../../../fields/List";
import { listSpec, makeInterface } from "../../../fields/Schema";
import { ComputedField } from "../../../fields/ScriptField";
import { Cast, NumCast, StrCast, WebCast, ImageCast, BoolCast } from "../../../fields/Types";
import { WebField, ImageField } from "../../../fields/URLField";
import { TraceMobx } from "../../../fields/util";
import { emptyFunction, getWordAtPoint, OmitKeys, returnFalse, returnOne, setupMoveUpEvents, smoothScroll, Utils } from "../../../Utils";
import { Docs } from "../../documents/Documents";
import { CurrentUserUtils } from "../../util/CurrentUserUtils";
import { KeyCodes } from "../../util/KeyCodes";
import { Scripting } from "../../util/Scripting";
import { SnappingManager } from "../../util/SnappingManager";
import { undoBatch } from "../../util/UndoManager";
import { MarqueeOptionsMenu } from "../collections/collectionFreeForm";
import { CollectionFreeFormView } from "../collections/collectionFreeForm/CollectionFreeFormView";
import { ContextMenu } from "../ContextMenu";
import { ContextMenuProps } from "../ContextMenuItem";
import { ViewBoxAnnotatableComponent, ViewBoxAnnotatableProps } from "../DocComponent";
import { DocumentDecorations } from "../DocumentDecorations";
import { Colors } from "../global/globalEnums";
import { LightboxView } from "../LightboxView";
import { MarqueeAnnotator } from "../MarqueeAnnotator";
import { AnchorMenu } from "../pdf/AnchorMenu";
import { Annotation } from "../pdf/Annotation";
import { SidebarAnnos } from "../SidebarAnnos";
import { StyleProp } from "../StyleProvider";
import { DocumentViewProps } from "./DocumentView";
import { FieldView, FieldViewProps } from './FieldView';
import { LinkDocPreview } from "./LinkDocPreview";
import "./WebBox.scss";
import React = require("react");
import { RequestOptions } from "https";
import { VideoBox } from "./VideoBox";
const { CreateImage } = require("./WebBoxRenderer");
const _global = (window /* browser */ || global /* node */) as any;
const htmlToText = require("html-to-text");
type WebDocument = makeInterface<[typeof documentSchema]>;
const WebDocument = makeInterface(documentSchema);

@observer
export class WebBox extends ViewBoxAnnotatableComponent<ViewBoxAnnotatableProps & FieldViewProps, WebDocument>(WebDocument) {
    public static LayoutString(fieldKey: string) { return FieldView.LayoutString(WebBox, fieldKey); }
    public static openSidebarWidth = 250;
    private _setPreviewCursor: undefined | ((x: number, y: number, drag: boolean, hide: boolean) => void);
    private _mainCont: React.RefObject<HTMLDivElement> = React.createRef();
    private _outerRef: React.RefObject<HTMLDivElement> = React.createRef();
    private _disposers: { [name: string]: IReactionDisposer } = {};
    private _annotationLayer: React.RefObject<HTMLDivElement> = React.createRef();
    private _keyInput = React.createRef<HTMLInputElement>();
    private _initialScroll: Opt<number>;
    private _sidebarRef = React.createRef<SidebarAnnos>();
    private _searchRef = React.createRef<HTMLInputElement>();
    private _searchString = "";
    @observable private _webUrl = "";  // url of the src parameter of the embedded iframe but not necessarily the rendered page - eg, when following a link, the rendered page changes but we don't wan the src parameter to also change as that would cause an unnecessary re-render.  
    @observable private _hackHide = false;  // apparently changing the value of the 'sandbox' prop doesn't necessarily apply it to the active iframe.  so thisforces the ifrmae to be rebuilt when allowScripts is toggled
    @observable private _searching: boolean = false;
    @observable private _showSidebar = false;
    @observable private _scrollTimer: any;
    @observable private _webPageHasBeenRendered = false;
    @observable private _overlayAnnoInfo: Opt<Doc>;
    @observable private _marqueeing: number[] | undefined;
    @observable private _isAnnotating = false;
    @observable private _iframeClick: HTMLIFrameElement | undefined = undefined;
    @observable private _iframe: HTMLIFrameElement | null = null;
    @observable private _savedAnnotations = new ObservableMap<number, HTMLDivElement[]>();
    @observable private _scrollHeight = NumCast(this.layoutDoc.scrollHeight, 1500);
    @computed get _url() { return this.webField?.toString() || ""; }
    @computed get _urlHash() { return this._url ? WebBox.urlHash(this._url) + "" : ""; }
    @computed get scrollHeight() { return this._scrollHeight; }
    @computed get allAnnotations() { return DocListCast(this.dataDoc[this.annotationKey]); }
    @computed get inlineTextAnnotations() { return this.allAnnotations.filter(a => a.textInlineAnnotations); }
    @computed get webField() { return Cast(this.dataDoc[this.props.fieldKey], WebField)?.url; }
    @computed get webThumb() { return ImageCast(this.layoutDoc["thumb-frozen"], ImageCast(this.layoutDoc.thumb))?.url; }

    constructor(props: any) {
        super(props);
        Doc.SetNativeWidth(this.dataDoc, Doc.NativeWidth(this.dataDoc) || 850);
        Doc.SetNativeHeight(this.dataDoc, Doc.NativeHeight(this.dataDoc) || this.Document[HeightSym]() / this.Document[WidthSym]() * 850);
        runInAction(() => this._webUrl = this._url);  // setting the weburl will change the src parameter of the embedded iframe and force a navigation to it.
    }

    @action
    search = (searchString: string, bwd?: boolean, clear: boolean = false) => {
        if (!this._searching && !clear) {
            this._searching = true;
            setTimeout(() => {
                this._searchRef.current?.focus();
                this._searchRef.current?.select();
                this._searchRef.current?.setRangeText(searchString);
            });
        }
        if (clear) {
            this._iframe?.contentWindow?.getSelection()?.empty();
        }
        if (searchString) {
            (this._iframe?.contentWindow as any)?.find(searchString, false, bwd, true);
        }
        return true;
    }
    async componentDidMount() {
        this.props.setContentView?.(this); // this tells the DocumentView that this WebBox is the "content" of the document.  this allows the DocumentView to call WebBox relevant methods to configure the UI (eg, show back/forward buttons)

        runInAction(() => {
            this._annotationKeySuffix = () => this._urlHash + "-annotations";
            // bcz: need to make sure that doc.data-annotations points to the currently active web page's annotations (this could/should be when the doc is created)
            this.dataDoc[this.fieldKey + "-annotations"] = ComputedField.MakeFunction(`copyField(this["${this.fieldKey}-"+urlHash(this["${this.fieldKey}"]?.url?.toString())+"-annotations"`);
            this.dataDoc[this.fieldKey + "-sidebar"] = ComputedField.MakeFunction(`copyField(this["${this.fieldKey}-"+urlHash(this["${this.fieldKey}"]?.url?.toString())+"-sidebar"`);
        });
        reaction(() => this.props.isSelected(),
            async (selected) => {
                if (selected) {
                    this._webPageHasBeenRendered = true;
                    setTimeout(action(() => {
                        this._scrollHeight = Math.max(this.scrollHeight, this._iframe?.contentDocument?.body.scrollHeight || 0);
                        if (this._initialScroll !== undefined && this._outerRef.current) {
                            setTimeout(() => {
                                this._outerRef.current!.scrollTop = this._initialScroll!;
                                this._initialScroll = undefined;
                            });
                        }
                    }));
                } else if (!this.props.isContentActive()) {
                    const imageBitmap = ImageCast(this.layoutDoc["thumb-frozen"])?.url.href;
                    if (this._iframe && !imageBitmap) {
                        var htmlString = this._iframe.contentDocument && new XMLSerializer().serializeToString(this._iframe.contentDocument);
                        if (!htmlString) {
                            htmlString = await (await fetch(Utils.CorsProxy(this.webField!.href))).text();
                        }
                        this.layoutDoc.thumb = undefined;
                        const nativeWidth = NumCast(this.layoutDoc.nativeWidth);
                        CreateImage(
                            this._webUrl.endsWith("/") ? this._webUrl.substring(0, this._webUrl.length - 1) : this._webUrl,
                            this._iframe.contentDocument?.styleSheets ?? [],
                            htmlString,
                            nativeWidth,
                            nativeWidth * this.props.PanelHeight() / this.props.PanelWidth(),
                            NumCast(this.layoutDoc._scrollTop)
                        ).then
                            ((dataUrl: any) => {
                                VideoBox.convertDataUri(dataUrl, this.layoutDoc[Id] + "-thumb" + (new Date()).getTime(), true).then(
                                    returnedfilename => setTimeout(action(() => this.layoutDoc.thumb = new ImageField(returnedfilename)), 500));
                            })
                            .catch(function (error: any) {
                                console.error('oops, something went wrong!', error);
                            });
                    }
                }
            });

        this._disposers.autoHeight = reaction(() => this.layoutDoc._autoHeight,
            autoHeight => {
                if (autoHeight) {
                    this.layoutDoc._nativeHeight = NumCast(this.props.Document[this.props.fieldKey + "-nativeHeight"]);
                    this.props.setHeight(NumCast(this.props.Document[this.props.fieldKey + "-nativeHeight"]) * (this.props.scaling?.() || 1));
                }
            });

        if (this.webField?.href.indexOf("youtube") !== -1) {
            const youtubeaspect = 400 / 315;
            const nativeWidth = Doc.NativeWidth(this.layoutDoc);
            const nativeHeight = Doc.NativeHeight(this.layoutDoc);
            if (this.webField) {
                if (!nativeWidth || !nativeHeight || Math.abs(nativeWidth / nativeHeight - youtubeaspect) > 0.05) {
                    if (!nativeWidth) Doc.SetNativeWidth(this.layoutDoc, 600);
                    Doc.SetNativeHeight(this.layoutDoc, (nativeWidth || 600) / youtubeaspect);
                    this.layoutDoc._height = this.layoutDoc[WidthSym]() / youtubeaspect;
                }
            } // else it's an HTMLfield
        } else if (this.webField && !this.dataDoc.text) {
            const result = await WebRequest.get(Utils.CorsProxy(this.webField.href));
            if (result) {
                this.dataDoc.text = htmlToText.fromString(result.content);
            }
        }

        var quickScroll = true;
        this._disposers.scrollReaction = reaction(() => NumCast(this.layoutDoc._scrollTop),
            (scrollTop) => {
                if (quickScroll) this._initialScroll = scrollTop;
                else {
                    const viewTrans = StrCast(this.Document._viewTransition);
                    const durationMiliStr = viewTrans.match(/([0-9]*)ms/);
                    const durationSecStr = viewTrans.match(/([0-9.]*)s/);
                    const duration = durationMiliStr ? Number(durationMiliStr[1]) : durationSecStr ? Number(durationSecStr[1]) * 1000 : 0;
                    this.goTo(scrollTop, duration);
                }
            },
            { fireImmediately: true }
        );
        quickScroll = false;
    }
    componentWillUnmount() {
        Object.values(this._disposers).forEach(disposer => disposer?.());
        this._iframe?.removeEventListener('wheel', this.iframeWheel, true);
        this._iframe?.contentDocument?.removeEventListener("pointerup", this.iframeUp);
    }

    @action
    createTextAnnotation = (sel: Selection, selRange: Range) => {
        if (this._mainCont.current) {
            const clientRects = selRange.getClientRects();
            for (let i = 0; i < clientRects.length; i++) {
                const rect = clientRects.item(i);
                if (rect && rect.width !== this._mainCont.current.clientWidth) {
                    const annoBox = document.createElement("div");
                    annoBox.className = "marqueeAnnotator-annotationBox";
                    // transforms the positions from screen onto the pdf div
                    annoBox.style.top = (rect.top + this._mainCont.current.scrollTop).toString();
                    annoBox.style.left = (rect.left).toString();
                    annoBox.style.width = (rect.width).toString();
                    annoBox.style.height = (rect.height).toString();
                    this._annotationLayer.current && MarqueeAnnotator.previewNewAnnotation(this._savedAnnotations, this._annotationLayer.current, annoBox, 1);
                }
            }
        }
        //this._selectionText = selRange.cloneContents().textContent || "";

        // clear selection
        if (sel.empty) sel.empty();// Chrome
        else if (sel.removeAllRanges) sel.removeAllRanges();  // Firefox
    }

    menuControls = () => this.urlEditor; // controls to be added to the top bar when a document of this type is selected

    scrollFocus = (doc: Doc, smooth: boolean) => {
        if (StrCast(doc.webUrl) !== this._url) this.submitURL(StrCast(doc.webUrl), !smooth);
        if (DocListCast(this.props.Document[this.fieldKey + "-sidebar"]).includes(doc) && !this.SidebarShown) {
            this.toggleSidebar(!smooth);
        }
        if (this._sidebarRef?.current?.makeDocUnfiltered(doc)) return 1;
        if (doc !== this.rootDoc && this._outerRef.current) {
            const windowHeight = this.props.PanelHeight() / (this.props.scaling?.() || 1);
            const scrollTo = Utils.scrollIntoView(NumCast(doc.y), doc[HeightSym](), NumCast(this.layoutDoc._scrollTop), windowHeight, windowHeight * .1);
            if (scrollTo !== undefined) {
                const focusSpeed = smooth ? 500 : 0;
                this._initialScroll !== undefined && (this._initialScroll = scrollTo);
                this.goTo(scrollTo, focusSpeed);
                return focusSpeed;
            }
        }
        this._initialScroll = NumCast(this.layoutDoc._scrollTop);
        return 0;
    }

    getAnchor = () => {
        const anchor =
            AnchorMenu.Instance?.GetAnchor(this._savedAnnotations) ??
            Docs.Create.WebanchorDocument(this._url, {
                title: StrCast(this.rootDoc.title + " " + this.layoutDoc._scrollTop),
                y: NumCast(this.layoutDoc._scrollTop),
                unrendered: true
            });
        this.addDocumentWrapper(anchor);
        return anchor;
    }

    @action
    iframeUp = (e: PointerEvent) => {
        this.props.docViewPath().lastElement()?.docView?.cleanupPointerEvents(); // pointerup events aren't generated on containing document view, so we have to invoke it here.
        if (this._iframe?.contentWindow && this._iframe.contentDocument && !this._iframe.contentWindow.getSelection()?.isCollapsed) {
            const mainContBounds = Utils.GetScreenTransform(this._mainCont.current!);
            const scale = (this.props.scaling?.() || 1) * mainContBounds.scale;
            const sel = this._iframe.contentWindow.getSelection();
            if (sel) {
                this.createTextAnnotation(sel, sel.getRangeAt(0));
                AnchorMenu.Instance.jumpTo(e.clientX * scale + mainContBounds.translateX,
                    e.clientY * scale + mainContBounds.translateY - NumCast(this.layoutDoc._scrollTop) * scale);
            }
        }
    }
    @action
    iframeDown = (e: PointerEvent) => {
        const mainContBounds = Utils.GetScreenTransform(this._mainCont.current!);
        const scale = (this.props.scaling?.() || 1) * mainContBounds.scale;
        const word = getWordAtPoint(e.target, e.clientX, e.clientY);
        this._setPreviewCursor?.(e.clientX, e.clientY, false, true);
        MarqueeAnnotator.clearAnnotations(this._savedAnnotations);
        this._marqueeing = [e.clientX * scale + mainContBounds.translateX,
        e.clientY * scale + mainContBounds.translateY - NumCast(this.layoutDoc._scrollTop) * scale];
        if (word || (e.target as any || "").className.includes("rangeslider") || (e.target as any)?.onclick || (e.target as any)?.parentNode?.onclick) {
            setTimeout(action(() => this._marqueeing = undefined), 100); // bcz: hack .. anchor menu is setup within MarqueeAnnotator so we need to at least create the marqueeAnnotator even though we aren't using it.
        } else {
            this._iframeClick = this._iframe ?? undefined;
            this._isAnnotating = true;
            this.props.select(false);
            e.stopPropagation();
            e.preventDefault();
        }

        // bcz: hack - iframe grabs all events which messes up how we handle contextMenus.  So this super naively simulates the event stack to get the specific menu items and the doc view menu items.
        if (e.button === 2 || (e.button === 0 && e.altKey)) {
            e.preventDefault();
            e.stopPropagation();
            ContextMenu.Instance.closeMenu();
            ContextMenu.Instance.setIgnoreEvents(true);
        }
    }

    getScrollHeight = () => this._scrollHeight;

    isFirefox = () => {
        return "InstallTrigger" in window; // navigator.userAgent.indexOf("Chrome") !== -1;
    }
    iframeClick = () => this._iframeClick;
    iframeScaling = () => 1 / this.props.ScreenToLocalTransform().Scale;

    @action
    iframeLoaded = (e: any) => {
        const iframe = this._iframe;
        let requrlraw = decodeURIComponent(iframe?.contentWindow?.location.href.replace(Utils.prepend("") + "/corsProxy/", "") ?? this._url.toString());
        if (requrlraw !== this._url.toString()) {
            if (requrlraw.match(/q=.*&/)?.length && this._url.toString().match(/q=.*&/)?.length) {
                const matches = requrlraw.match(/[^a-zA-z]q=[^&]*/g);
                const newsearch = matches?.lastElement()!;
                if (matches) {
                    requrlraw = requrlraw.substring(0, requrlraw.indexOf(newsearch));
                    for (let i = 1; i < Array.from(matches)?.length; i++) {
                        requrlraw = requrlraw.replace(matches[i], "");
                    }
                }
                requrlraw = requrlraw.replace(/q=[^&]*/, newsearch.substring(1)).replace("search&", "search?").replace("?gbv=1", "");
            }
            this.submitURL(requrlraw, undefined, true);
        }
        if (iframe?.contentDocument) {
            iframe.contentDocument.addEventListener("pointerup", this.iframeUp);
            iframe.contentDocument.addEventListener("pointerdown", this.iframeDown);
            this._scrollHeight = Math.max(this.scrollHeight, iframe?.contentDocument.body.scrollHeight);
            setTimeout(action(() => this._scrollHeight = Math.max(this.scrollHeight, iframe?.contentDocument?.body.scrollHeight || 0)), 5000);
            iframe.setAttribute("enable-annotation", "true");
            iframe.contentDocument.addEventListener("click", undoBatch(action((e: MouseEvent) => {
                let href = "";
                for (let ele = e.target as any; ele; ele = ele.parentElement) {
                    href = (typeof (ele.href) === "string" ? ele.href : ele.href?.baseVal) || ele.parentElement?.href || href;
                }
                const origin = this.webField?.origin;
                if (href && origin) {
                    e.stopPropagation();
                    setTimeout(() => this.submitURL(href.replace(Utils.prepend(""), origin)));
                    if (this._outerRef.current) {
                        this._outerRef.current.scrollTop = NumCast(this.layoutDoc._scrollTop);
                        this._outerRef.current.scrollLeft = 0;
                    }
                }
            })));
            iframe.contentDocument.addEventListener('wheel', this.iframeWheel, false);
            //iframe.contentDocument.addEventListener('scroll', () => !this.active() && this._iframe && (this._iframe.scrollTop = NumCast(this.layoutDoc._scrollTop), false));
        }
    }

    @action
    iframeWheel = (e: any) => {
        if (!this._scrollTimer) {
            this._scrollTimer = setTimeout(action(() => this._scrollTimer = undefined), 250); // this turns events off on the iframe which allows scrolling to change direction smoothly
        }
    }

    @action
    setDashScrollTop = (scrollTop: number, timeout: number = 250) => {
        const iframeHeight = Math.max(1000, this._scrollHeight - this.panelHeight());
        timeout = scrollTop > iframeHeight ? 0 : timeout;
        this._scrollTimer && clearTimeout(this._scrollTimer);
        this._scrollTimer = setTimeout(action(() => {
            this._scrollTimer = undefined;
            if (!LinkDocPreview.LinkInfo && this._outerRef.current &&
                (!LightboxView.LightboxDoc || LightboxView.IsLightboxDocView(this.props.docViewPath()))) {
                this.layoutDoc._scrollTop = this._outerRef.current.scrollTop = scrollTop > iframeHeight ? iframeHeight : scrollTop;
            }
        }), timeout);
    }

    goTo = (scrollTop: number, duration: number) => {
        if (this._outerRef.current) {
            const iframeHeight = Math.max(1000, this._scrollHeight - this.panelHeight());
            scrollTop = scrollTop > iframeHeight + 50 ? iframeHeight : scrollTop;
            if (duration) {
                smoothScroll(duration, [this._outerRef.current], scrollTop);
                this.setDashScrollTop(scrollTop, duration);
            } else {
                this.setDashScrollTop(scrollTop);
            }
        }
    }

    forward = (checkAvailable?: boolean) => {
        const future = Cast(this.dataDoc[this.fieldKey + "-future"], listSpec("string"), []);
        const history = Cast(this.dataDoc[this.fieldKey + "-history"], listSpec("string"), []);
        if (checkAvailable) return future.length;
        runInAction(() => {
            if (future.length) {
                const curUrl = this._url;
                this.dataDoc[this.fieldKey + "-history"] = new List<string>([...history, this._url]);
                this.dataDoc[this.fieldKey] = new WebField(new URL(future.pop()!));
                if (this._webUrl === this._url) {
                    this._webUrl = curUrl;
                    setTimeout(action(() => this._webUrl = this._url));
                } else {
                    this._webUrl = this._url;
                }
                return true;
            }
        });
        return false;
    }

    back = (checkAvailable?: boolean) => {
        const future = Cast(this.dataDoc[this.fieldKey + "-future"], listSpec("string"));
        const history = Cast(this.dataDoc[this.fieldKey + "-history"], listSpec("string"), []);
        if (checkAvailable) return history.length;
        runInAction(() => {
            if (history.length) {
                const curUrl = this._url;
                if (future === undefined) this.dataDoc[this.fieldKey + "-future"] = new List<string>([this._url]);
                else this.dataDoc[this.fieldKey + "-future"] = new List<string>([...future, this._url]);
                this.dataDoc[this.fieldKey] = new WebField(new URL(history.pop()!));
                if (this._webUrl === this._url) {
                    this._webUrl = curUrl;
                    setTimeout(action(() => this._webUrl = this._url));
                } else {
                    this._webUrl = this._url;
                }
                return true;
            }
        });
        return false;
    }

    static urlHash = (s: string) => {
        return Math.abs(s.split('').reduce((a: any, b: any) => { a = ((a << 5) - a) + b.charCodeAt(0); return a & a; }, 0));
    }
    @action
    submitURL = (newUrl?: string, preview?: boolean, dontUpdateIframe?: boolean) => {
        if (!newUrl) return;
        if (!newUrl.startsWith("http")) newUrl = "http://" + newUrl;
        try {
            const future = Cast(this.dataDoc[this.fieldKey + "-future"], listSpec("string"));
            const history = Cast(this.dataDoc[this.fieldKey + "-history"], listSpec("string"));
            const url = this.webField?.toString();
            if (url && !preview) {
                this.dataDoc[this.fieldKey + "-history"] = new List<string>([...(history || []), url]);
                this.layoutDoc._scrollTop = 0;
                future && (future.length = 0);
            }
            if (!preview) {
                this.dataDoc[this.fieldKey] = new WebField(new URL(newUrl));
                !dontUpdateIframe && (this._webUrl = this._url);
            }
        } catch (e) {
            console.log("WebBox URL error:" + this._url);
        }
        return true;
    }

    onWebUrlDrop = (e: React.DragEvent) => {
        const { dataTransfer } = e;
        const html = dataTransfer.getData("text/html");
        const uri = dataTransfer.getData("text/uri-list");
        const url = uri || html || this._url || "";
        const newurl = url.startsWith(window.location.origin) ?
            url.replace(window.location.origin, this._url?.match(/http[s]?:\/\/[^\/]*/)?.[0] || "") : url;
        this.submitURL(newurl);
        e.stopPropagation();
    }
    onWebUrlValueKeyDown = (e: React.KeyboardEvent) => {
        e.key === "Enter" && this.submitURL(this._keyInput.current!.value);
        e.stopPropagation();
    }

    @computed get urlEditor() {
        return (
            <div className="collectionMenu-webUrlButtons" onDrop={this.onWebUrlDrop} onDragOver={e => e.preventDefault()} >
                <input className="collectionMenu-urlInput" key={this._url}
                    placeholder="ENTER URL"
                    defaultValue={this._url}
                    onDrop={this.onWebUrlDrop}
                    onDragOver={e => e.preventDefault()}
                    onKeyDown={this.onWebUrlValueKeyDown}
                    onClick={(e) => {
                        this._keyInput.current!.select();
                        e.stopPropagation();
                    }}
                    ref={this._keyInput}
                />
                <div style={{ display: "flex", flexDirection: "row", justifyContent: "space-between", maxWidth: "250px", }}>
                    <button className="submitUrl" onClick={() => this.submitURL(this._keyInput.current!.value)} onDragOver={e => e.stopPropagation()} onDrop={this.onWebUrlDrop}>
                        GO
                    </button>
                    <button className="submitUrl" onClick={() => this.back}> <FontAwesomeIcon icon="caret-left" size="lg" /> </button>
                    <button className="submitUrl" onClick={() => this.forward}> <FontAwesomeIcon icon="caret-right" size="lg" />  </button>
                </div>
            </div>
        );
    }

    specificContextMenu = (e: React.MouseEvent | PointerEvent): void => {
        const cm = ContextMenu.Instance;
        const funcs: ContextMenuProps[] = [];
        if (!cm.findByDescription("Options...")) {
            !Doc.UserDoc().noviceMode && funcs.push({ description: (this.layoutDoc.useCors ? "Don't Use" : "Use") + " Cors", event: () => this.layoutDoc.useCors = !this.layoutDoc.useCors, icon: "snowflake" });
            funcs.push({
                description: (this.layoutDoc.allowScripts ? "Prevent" : "Allow") + " Scripts", event: () => {
                    this.layoutDoc.allowScripts = !this.layoutDoc.allowScripts;
                    if (this._iframe) {
                        runInAction(() => this._hackHide = true);
                        setTimeout(action(() => this._hackHide = false));
                    }
                }, icon: "snowflake"
            });
            funcs.push({
                description: (!this.layoutDoc.forceReflow ? "Force" : "Prevent") + " Reflow", event: () => {
                    const nw = !this.layoutDoc.forceReflow ? undefined : Doc.NativeWidth(this.layoutDoc) - this.sidebarWidth() / (this.props.scaling?.() || 1);
                    this.layoutDoc.forceReflow = !nw;
                    if (nw) {
                        Doc.SetInPlace(this.layoutDoc, this.fieldKey + "-nativeWidth", nw, true);
                    }
                }, icon: "snowflake"
            });
            cm.addItem({ description: "Options...", subitems: funcs, icon: "asterisk" });
        }
    }

    @action
    onMarqueeDown = (e: React.PointerEvent) => {
        if (!e.altKey && e.button === 0 && this.props.isContentActive(true) && ![InkTool.Highlighter, InkTool.Pen].includes(CurrentUserUtils.SelectedTool)) {
            setupMoveUpEvents(this, e, action(e => {
                MarqueeAnnotator.clearAnnotations(this._savedAnnotations);
                this._marqueeing = [e.clientX, e.clientY];
                return true;
            }), returnFalse, () => MarqueeAnnotator.clearAnnotations(this._savedAnnotations), false);
        }
    }
    @action finishMarquee = (x?: number, y?: number, e?: PointerEvent) => {
        this._marqueeing = undefined;
        this._isAnnotating = false;
        this._iframeClick = undefined;
        if (x !== undefined && y !== undefined) {
            this._setPreviewCursor?.(x, y, false, false);
            ContextMenu.Instance.closeMenu();
            ContextMenu.Instance.setIgnoreEvents(false);
            if (e?.button === 2 || e?.altKey) {
                this.specificContextMenu(undefined as any);
                this.props.docViewPath().lastElement().docView?.onContextMenu(undefined, x, y);
            }
        }
    }

    @computed get urlContent() {
        if (this._hackHide || (this.webThumb && !this._webPageHasBeenRendered)) return (null);
        const field = this.dataDoc[this.props.fieldKey];
        let view;
        if (field instanceof HtmlField) {
            view = <span className="webBox-htmlSpan" dangerouslySetInnerHTML={{ __html: field.html }} />;
        } else if (field instanceof WebField) {
            const url = this.layoutDoc.useCors ? Utils.CorsProxy(this._webUrl) : this._webUrl;
            view = <iframe className="webBox-iframe" enable-annotation={"true"}
                style={{ pointerEvents: this._scrollTimer ? "none" : undefined }}
                ref={action((r: HTMLIFrameElement | null) => this._iframe = r)} src={url} onLoad={this.iframeLoaded}
                // the 'allow-top-navigation' and 'allow-top-navigation-by-user-activation' attributes are left out to prevent iframes from redirecting the top-level Dash page
                // sandbox={"allow-forms allow-modals allow-orientation-lock allow-pointer-lock allow-popups allow-popups-to-escape-sandbox allow-presentation allow-same-origin allow-scripts"} />;
                sandbox={`${this.layoutDoc.allowScripts ? "allow-scripts" : ""} allow-forms allow-modals allow-orientation-lock allow-pointer-lock allow-popups allow-popups-to-escape-sandbox allow-presentation allow-same-origin`} />;
        } else {
            view = <iframe className="webBox-iframe" enable-annotation={"true"}
                style={{ pointerEvents: this._scrollTimer ? "none" : undefined }} // if we allow pointer events when scrolling is on, then reversing direction does not work smoothly
                ref={action((r: HTMLIFrameElement | null) => this._iframe = r)} src={"https://crossorigin.me/https://cs.brown.edu"} />;
        }
        setTimeout(action(() => this._webPageHasBeenRendered = true));
        return view;
    }

    addDocumentWrapper = (doc: Doc | Doc[], annotationKey?: string) => {
        (doc instanceof Doc ? [doc] : doc).forEach(doc => doc.webUrl = this._url);
        return this.addDocument(doc, annotationKey);
    }

    sidebarAddDocument = (doc: Doc | Doc[], sidebarKey?: string) => {
        if (!this.layoutDoc._showSidebar) this.toggleSidebar();
        return this.addDocumentWrapper(doc, sidebarKey);
    }
    sidebarBtnDown = (e: React.PointerEvent) => {
        setupMoveUpEvents(this, e, (e, down, delta) => {
            const localDelta = this.props.ScreenToLocalTransform().scale(this.props.scaling?.() || 1).transformDirection(delta[0], delta[1]);
            const nativeWidth = NumCast(this.layoutDoc[this.fieldKey + "-nativeWidth"]);
            const curNativeWidth = NumCast(this.layoutDoc.nativeWidth, nativeWidth);
            const ratio = (curNativeWidth + localDelta[0] / (this.props.scaling?.() || 1)) / nativeWidth;
            if (ratio >= 1) {
                this.layoutDoc.nativeWidth = nativeWidth * ratio;
                this.layoutDoc._width = this.layoutDoc[WidthSym]() + localDelta[0];
                this.layoutDoc._showSidebar = nativeWidth !== this.layoutDoc._nativeWidth;
            }
            return false;
        }, emptyFunction, () => this.toggleSidebar());
    }
    @observable _previewNativeWidth: Opt<number> = undefined;
    @observable _previewWidth: Opt<number> = undefined;
    toggleSidebar = action((preview: boolean = false) => {
        const nativeWidth = NumCast(this.layoutDoc[this.fieldKey + "-nativeWidth"]);
        const ratio = ((!this.layoutDoc.nativeWidth || this.layoutDoc.nativeWidth === nativeWidth ? WebBox.openSidebarWidth : 0) + nativeWidth) / nativeWidth;
        const curNativeWidth = NumCast(this.layoutDoc.nativeWidth, nativeWidth);
        if (preview) {
            this._previewNativeWidth = nativeWidth * ratio;
            this._previewWidth = this.layoutDoc[WidthSym]() * nativeWidth * ratio / curNativeWidth;
            this._showSidebar = true;
        }
        else {
            this.layoutDoc.nativeWidth = nativeWidth * ratio;
            this.layoutDoc._width = this.layoutDoc[WidthSym]() * nativeWidth * ratio / curNativeWidth;
            this.layoutDoc._showSidebar = nativeWidth !== this.layoutDoc._nativeWidth;
        }
    });
    sidebarWidth = () => !this.SidebarShown ? 0 :
        this._previewWidth ? WebBox.openSidebarWidth :
            (NumCast(this.layoutDoc.nativeWidth) - Doc.NativeWidth(this.dataDoc)) * this.props.PanelWidth() /
            NumCast(this.layoutDoc.nativeWidth)

    @computed get content() {
        const interactive = !this.props.docViewPath().lastElement()?.docView?._pendingDoubleClick && this.props.isContentActive() && this.props.pointerEvents !== "none" && CurrentUserUtils.SelectedTool === InkTool.None && !DocumentDecorations.Instance?.Interacting;
        return <div className={"webBox-cont" + (interactive ? "-interactive" : "")}
            style={{ width: !this.layoutDoc.forceReflow ? NumCast(this.layoutDoc[this.fieldKey + "-nativeWidth"]) || `100%` : "100%", }}>
            {this.urlContent}
        </div>;
    }

    @computed get annotationLayer() {
        TraceMobx();
        const pe = this.pointerEvents();
        return <div className="webBox-annotationLayer" style={{ height: Doc.NativeHeight(this.Document) || undefined }} ref={this._annotationLayer}>
            {this.inlineTextAnnotations.sort((a, b) => NumCast(a.y) - NumCast(b.y)).map(anno =>
                <Annotation {...this.props} fieldKey={this.annotationKey} pointerEvents={pe} showInfo={this.showInfo} dataDoc={this.dataDoc} anno={anno} key={`${anno[Id]}-annotation`} />)}
        </div>;

    }
    @computed get SidebarShown() { return this._showSidebar || this.layoutDoc._showSidebar ? true : false; }

    @computed get searchUI() {
        return <div className="webBox-ui"
            onPointerDown={e => e.stopPropagation()} style={{ display: this.props.isContentActive() ? "flex" : "none" }}>
            <div className="webBox-overlayCont" onPointerDown={(e) => e.stopPropagation()} style={{ left: `${this._searching ? 0 : 100}%` }}>
                <button className="webBox-overlayButton" title={"search"} />
                <input className="webBox-searchBar" placeholder="Search" ref={this._searchRef} onChange={this.searchStringChanged}
                    onKeyDown={e => e.keyCode === KeyCodes.ENTER && this.search(this._searchString, e.shiftKey)} />
                <button className="webBox-search" title="Search" onClick={e => this.search(this._searchString, e.shiftKey)}>
                    <FontAwesomeIcon icon="search" size="sm" />
                </button>
            </div>
            <button className="webBox-overlayButton" title={"search"}
                onClick={action(() => { this._searching = !this._searching; this.search("", false, true); })} >
                <div className="webBox-overlayButton-arrow" onPointerDown={(e) => e.stopPropagation()} />
                <div className="webBox-overlayButton-iconCont" onPointerDown={(e) => e.stopPropagation()}>
                    <FontAwesomeIcon icon={this._searching ? "times" : "search"} size="lg" />
                </div>
            </button>
        </div>;
    }
    searchStringChanged = (e: React.ChangeEvent<HTMLInputElement>) => this._searchString = e.currentTarget.value;
    showInfo = action((anno: Opt<Doc>) => this._overlayAnnoInfo = anno);
    setPreviewCursor = (func?: (x: number, y: number, drag: boolean, hide: boolean) => void) => this._setPreviewCursor = func;
    panelWidth = () => this.props.PanelWidth() / (this.props.scaling?.() || 1) - this.sidebarWidth(); // (this.Document.scrollHeight || Doc.NativeHeight(this.Document) || 0);
    panelHeight = () => this.props.PanelHeight() / (this.props.scaling?.() || 1); // () => this._pageSizes.length && this._pageSizes[0] ? this._pageSizes[0].width : Doc.NativeWidth(this.Document);
    scrollXf = () => this.props.ScreenToLocalTransform().translate(0, NumCast(this.layoutDoc._scrollTop));
    anchorMenuClick = () => this._sidebarRef.current?.anchorMenuClick;
    basicFilter = () => [...this.props.docFilters(), Utils.PropUnsetFilter("textInlineAnnotations")];
    transparentFilter = () => [...this.props.docFilters(), Utils.IsTransparentFilter()];
    opaqueFilter = () => [...this.props.docFilters(), Utils.IsOpaqueFilter()];
    childStyleProvider = (doc: (Doc | undefined), props: Opt<DocumentViewProps>, property: string): any => {
        if (doc instanceof Doc && property === StyleProp.PointerEvents) {
            if (doc.textInlineAnnotations) return "none";
        }
        return this.props.styleProvider?.(doc, props, property);
    }
    pointerEvents = () => this.props.isContentActive() && this.props.pointerEvents !== "none" && !MarqueeOptionsMenu.Instance.isShown() ? "all" : SnappingManager.GetIsDragging() ? undefined : "none";
    render() {
        const pointerEvents = this.props.layerProvider?.(this.layoutDoc) === false ? "none" : this.props.pointerEvents ? this.props.pointerEvents as any : undefined;
        const previewScale = this._previewNativeWidth ? 1 - this.sidebarWidth() / this._previewNativeWidth : 1;
        const scale = previewScale * (this.props.scaling?.() || 1);
        const renderAnnotations = (docFilters?: () => string[]) =>
            <CollectionFreeFormView {...OmitKeys(this.props, ["NativeWidth", "NativeHeight", "setContentView"]).omit}
                renderDepth={this.props.renderDepth + 1}
                isAnnotationOverlay={true}
                fieldKey={this.annotationKey}
                CollectionView={undefined}
                setPreviewCursor={this.setPreviewCursor}
                PanelWidth={this.panelWidth}
                PanelHeight={this.panelHeight}
                ScreenToLocalTransform={this.scrollXf}
                scaling={returnOne}
                dropAction={"alias"}
                docFilters={docFilters || this.basicFilter}
                dontRenderDocuments={docFilters ? false : true}
                select={emptyFunction}
                ContentScaling={returnOne}
                bringToFront={emptyFunction}
                whenChildContentsActiveChanged={this.whenChildContentsActiveChanged}
                removeDocument={this.removeDocument}
                moveDocument={this.moveDocument}
                addDocument={this.sidebarAddDocument}
                styleProvider={this.childStyleProvider}
                childPointerEvents={this.props.isContentActive() ? "all" : undefined}
                pointerEvents={this._isAnnotating || SnappingManager.GetIsDragging() ? "all" : "none"} />;
        return (
            <div className="webBox" ref={this._mainCont}
                style={{ pointerEvents: this.pointerEvents(), display: !this.props.isSelected() && !this.isAnyChildContentActive() && this.webThumb ? "none" : undefined }} >
                <div className="webBox-container" style={{ pointerEvents }} onContextMenu={this.specificContextMenu}>
                    <div className={"webBox-outerContent"} ref={this._outerRef}
                        style={{
                            width: `calc(${100 / scale}% - ${this.sidebarWidth() / scale * (this._previewWidth ? scale : 1)}px)`,
                            height: `${100 / scale}%`,
                            transform: `scale(${scale})`,
                            pointerEvents
                        }}
                        onWheel={e => { e.stopPropagation(); e.preventDefault(); }} // block wheel events from propagating since they're handled by the iframe
                        onScroll={e => this.setDashScrollTop(this._outerRef.current?.scrollTop || 0)}
                        onPointerDown={this.onMarqueeDown}
                    >
                        <div className={"webBox-innerContent"} style={{ height: NumCast(this.scrollHeight, 50), pointerEvents }}>
                            {this.content}
                            <div style={{ mixBlendMode: "multiply" }}>
                                {renderAnnotations(this.transparentFilter)}
                            </div>
                            {renderAnnotations(this.opaqueFilter)}
                            {SnappingManager.GetIsDragging() ? (null) : renderAnnotations()}
                            {this.annotationLayer}
                        </div>
                    </div>
                    {!this._marqueeing || !this._mainCont.current || !this._annotationLayer.current ? (null) :
                        <MarqueeAnnotator rootDoc={this.rootDoc}
                            iframe={this.isFirefox() ? this.iframeClick : undefined}
                            iframeScaling={this.isFirefox() ? this.iframeScaling : undefined}
                            anchorMenuClick={this.anchorMenuClick}
                            scrollTop={0}
                            down={this._marqueeing} scaling={returnOne}
                            addDocument={this.addDocumentWrapper}
                            docView={this.props.docViewPath().lastElement()}
                            finishMarquee={this.finishMarquee}
                            savedAnnotations={this._savedAnnotations}
                            annotationLayer={this._annotationLayer.current}
                            mainCont={this._mainCont.current} />}
                </div >
                <SidebarAnnos ref={this._sidebarRef}
                    {...this.props}
                    whenChildContentsActiveChanged={this.whenChildContentsActiveChanged}
                    fieldKey={this.fieldKey + "-" + this._urlHash}
                    rootDoc={this.rootDoc}
                    layoutDoc={this.layoutDoc}
                    dataDoc={this.dataDoc}
                    setHeight={emptyFunction}
                    nativeWidth={this._previewNativeWidth ?? NumCast(this.layoutDoc._nativeWidth)}
                    showSidebar={this.SidebarShown}
                    sidebarAddDocument={this.sidebarAddDocument}
                    moveDocument={this.moveDocument}
                    removeDocument={this.removeDocument}
                />
                <div className="webBox-overlayButton-sidebar" key="sidebar" title="Toggle Sidebar"
                    style={{
                        display: !this.props.isContentActive() ? "none" : undefined,
                        top: StrCast(this.rootDoc._showTitle) === "title" ? 20 : 5,
                        backgroundColor: this.SidebarShown ? Colors.MEDIUM_BLUE : Colors.BLACK
                    }}
                    onPointerDown={this.sidebarBtnDown} >
                    <FontAwesomeIcon style={{ color: Colors.WHITE }} icon={"comment-alt"} size="sm" />
                </div>
                {!this.props.isContentActive() ? (null) : this.searchUI}
            </div>);
    }
}
Scripting.addGlobal(function urlHash(url: string) { return WebBox.urlHash(url); });