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import React = require("react");
import { ContextMenuItem, ContextMenuProps } from "./ContextMenuItem";
import { observable, action, computed } from "mobx";
import { observer } from "mobx-react";
import "./ContextMenu.scss";
import { library } from '@fortawesome/fontawesome-svg-core';
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import { faSearch, faCircle } from '@fortawesome/free-solid-svg-icons';
library.add(faSearch);
library.add(faCircle);
@observer
export class ContextMenu extends React.Component {
static Instance: ContextMenu;
@observable private _items: Array<ContextMenuProps> = [{ description: "test", event: (e: React.MouseEvent) => e.preventDefault(), icon: "smile" }];
@observable private _pageX: number = 0;
@observable private _pageY: number = 0;
@observable private _display: boolean = false;
@observable private _searchString: string = "";
// afaik displaymenu can be called before all the items are added to the menu, so can't determine in displayMenu what the height of the menu will be
@observable private _yRelativeToTop: boolean = true;
private _searchRef = React.createRef<HTMLInputElement>();
private ref: React.RefObject<HTMLDivElement>;
constructor(props: Readonly<{}>) {
super(props);
this.ref = React.createRef();
ContextMenu.Instance = this;
}
@action
clearItems() {
this._items = [];
}
@action
addItem(item: ContextMenuProps) {
if (this._items.indexOf(item) === -1) {
this._items.push(item);
}
}
getItems() {
return this._items;
}
@action
displayMenu(x: number, y: number) {
//maxX and maxY will change if the UI/font size changes, but will work for any amount
//of items added to the menu
let maxX = window.innerWidth - 150;
let maxY = window.innerHeight - ((this._items.length + 1/*for search box*/) * 34 + 30);
this._pageX = x > maxX ? maxX : x;
this._pageY = y > maxY ? maxY : y;
this._searchString = "";
this._display = true;
if (this._searchRef.current) {
this._searchRef.current.focus();
}
}
@action
closeMenu = () => {
this.clearItems();
this._display = false;
}
@computed get filteredItems() {
const searchString = this._searchString.toLowerCase().split(" ");
const matches = (descriptions: string[]): boolean => {
return searchString.every(s => descriptions.some(desc => desc.includes(s)));
};
const createGroupHeader = (contents: any) => {
return (
<div className="contextMenu-group">
<div className="contextMenu-description">{contents}</div>
</div>
);
};
const createItem = (item: ContextMenuProps) => <ContextMenuItem {...item} key={item.description} closeMenu={this.closeMenu} />;
const flattenItems = (items: ContextMenuProps[], groupFunc: (contents: any) => JSX.Element, getPath: () => string[]) => {
let eles: JSX.Element[] = [];
for (const item of items) {
const description = item.description.toLowerCase();
const path = [...getPath(), description];
if ("subitems" in item) {
const children = flattenItems(item.subitems, contents => groupFunc(<>{item.description} -> {contents}</>), () => path);
if (children.length || matches(path)) {
eles.push(groupFunc(item.description));
eles = eles.concat(children);
}
} else {
if (!matches(path)) {
continue;
}
eles.push(createItem(item));
}
}
return eles;
};
return flattenItems(this._items, createGroupHeader, () => []);
}
@computed get menuItems() {
if (!this._searchString) {
return this._items.map(item => <ContextMenuItem {...item} key={item.description} closeMenu={this.closeMenu} />);
}
return this.filteredItems;
}
render() {
if (!this._display) {
return null;
}
let style = this._yRelativeToTop ? { left: this._pageX, top: this._pageY } :
{ left: this._pageX, bottom: this._pageY };
return (
<div className="contextMenu-cont" style={style} ref={this.ref}>
<span>
<span className="icon-background">
<FontAwesomeIcon icon="search" size="lg" />
</span>
<input className="contextMenu-item contextMenu-description" type="text" placeholder="Search . . ." value={this._searchString} onChange={this.onChange} ref={this._searchRef} autoFocus />
</span>
{this.menuItems}
</div>
);
}
@action
onChange = (e: React.ChangeEvent<HTMLInputElement>) => {
this._searchString = e.target.value;
}
}
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