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import { action, observable, ObservableMap } from "mobx";
import { computedFn } from "mobx-utils";
import { Doc, Opt } from "../../fields/Doc";
import { DocumentType } from "../documents/DocumentTypes";
import { CollectionViewType } from "../views/collections/CollectionView";
import { DocumentView } from "../views/nodes/DocumentView";
export namespace SelectionManager {
class Manager {
@observable IsDragging: boolean = false;
SelectedViews: ObservableMap<DocumentView, Doc> = new ObservableMap();
@observable SelectedSchemaDocument: Doc | undefined;
@action
SelectSchemaViewDoc(doc: Opt<Doc>) {
manager.SelectedSchemaDocument = doc;
}
@action
SelectView(docView: DocumentView, ctrlPressed: boolean): void {
// if doc is not in SelectedDocuments, add it
if (!manager.SelectedViews.get(docView) && docView.props.Document.type !== DocumentType.MARKER) {
if (!ctrlPressed) {
this.DeselectAll();
}
manager.SelectedViews.set(docView, docView.rootDoc);
docView.props.whenChildContentsActiveChanged(true);
} else if (!ctrlPressed && Array.from(manager.SelectedViews.entries()).length > 1) {
Array.from(manager.SelectedViews.keys()).map(dv => dv !== docView && dv.props.whenChildContentsActiveChanged(false));
manager.SelectedSchemaDocument = undefined;
manager.SelectedViews.clear();
manager.SelectedViews.set(docView, docView.rootDoc);
}
}
@action
DeselectView(docView: DocumentView): void {
if (manager.SelectedViews.get(docView)) {
manager.SelectedViews.delete(docView);
docView.props.whenChildContentsActiveChanged(false);
}
}
@action
DeselectAll(): void {
manager.SelectedSchemaDocument = undefined;
Array.from(manager.SelectedViews.keys()).map(dv => dv.props.whenChildContentsActiveChanged(false));
manager.SelectedViews.clear();
}
}
const manager = new Manager();
export function DeselectView(docView: DocumentView): void {
manager.DeselectView(docView);
}
export function SelectView(docView: DocumentView, ctrlPressed: boolean): void {
manager.SelectView(docView, ctrlPressed);
}
export function SelectSchemaViewDoc(document: Opt<Doc>): void {
manager.SelectSchemaViewDoc(document);
}
const IsSelectedCache = computedFn(function isSelected(doc: DocumentView) { // wrapping get() in a computedFn only generates mobx() invalidations when the return value of the function for the specific get parameters has changed
return manager.SelectedViews.get(doc) ? true : false;
});
// computed functions, such as used in IsSelected generate errors if they're called outside of a
// reaction context. Specifying the context with 'outsideReaction' allows an efficiency feature
// to avoid unnecessary mobx invalidations when running inside a reaction.
export function IsSelected(doc: DocumentView | undefined, outsideReaction?: boolean): boolean {
return !doc ? false : outsideReaction ?
manager.SelectedViews.get(doc) ? true : false : // get() accesses a hashtable -- setting anything in the hashtable generates a mobx invalidation for every get()
IsSelectedCache(doc);
}
export function DeselectAll(except?: Doc): void {
let found: DocumentView | undefined = undefined;
if (except) {
for (const view of Array.from(manager.SelectedViews.keys())) {
if (view.props.Document === except) found = view;
}
}
manager.DeselectAll();
if (found) manager.SelectView(found, false);
}
export function Views(): Array<DocumentView> {
return Array.from(manager.SelectedViews.keys()).filter(dv => manager.SelectedViews.get(dv)?._viewType !== CollectionViewType.Docking);
}
export function SelectedSchemaDoc(): Doc | undefined {
return manager.SelectedSchemaDocument;
}
export function Docs(): Doc[] {
return Array.from(manager.SelectedViews.values()).filter(doc => doc?._viewType !== CollectionViewType.Docking);
}
}
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