@tdb/util/lib/helpers/mouse/mouse.js

Shared helpers and utilities.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var rxjs_1 = require("rxjs");
var operators_1 = require("rxjs/operators");
var dummy = function () { return null; };
function fromProps(props, args) {
    if (args === void 0) { args = {}; }
    var _a = args.force, force = _a === void 0 ? [] : _a;
    var prep = function (type, handler) {
        return handler ? handler : force.includes(type) ? dummy : undefined;
    };
    return handlers(props.onMouse, {
        onClick: prep('CLICK', props.onClick),
        onDoubleClick: prep('DOUBLE_CLICK', props.onDoubleClick),
        onMouseDown: prep('DOWN', props.onMouseDown),
        onMouseUp: prep('UP', props.onMouseUp),
        onMouseEnter: prep('ENTER', props.onMouseEnter),
        onMouseLeave: prep('LEAVE', props.onMouseLeave),
    });
}
exports.fromProps = fromProps;
function handlers(handler, args) {
    if (args === void 0) { args = {}; }
    var isActive = Boolean(handler) ||
        Object.keys(args).some(function (key) { return typeof args[key] === 'function'; });
    var getSingleHandler = function (type) {
        switch (type) {
            case 'CLICK':
                return args.onClick;
            case 'DOUBLE_CLICK':
                return args.onDoubleClick;
            case 'DOWN':
                return args.onMouseDown;
            case 'UP':
                return args.onMouseUp;
            case 'ENTER':
                return args.onMouseEnter;
            case 'LEAVE':
                return args.onMouseLeave;
            default:
                throw new Error("Mouse event type '" + type + "' not supported.");
        }
    };
    var next$ = new rxjs_1.Subject();
    var fireNext = function (e) {
        next$.next(e);
        var singular = getSingleHandler(e.type);
        if (singular) {
            singular(e._react);
        }
    };
    var get = function (type) {
        var hasSingularEvent = Boolean(getSingleHandler(type));
        var handlers = handler || hasSingularEvent ? [fireNext, handler] : [];
        return handler || hasSingularEvent ? exports.handle.apply(void 0, [type].concat(handlers)) : undefined;
    };
    return {
        isActive: isActive,
        events$: next$.pipe(operators_1.share()),
        events: {
            onClick: get('CLICK'),
            onDoubleClick: get('DOUBLE_CLICK'),
            onMouseDown: get('DOWN'),
            onMouseUp: get('UP'),
            onMouseEnter: get('ENTER'),
            onMouseLeave: get('LEAVE'),
        },
    };
}
exports.handlers = handlers;
exports.handle = function (type) {
    var handler = [];
    for (var _i = 1; _i < arguments.length; _i++) {
        handler[_i - 1] = arguments[_i];
    }
    var handlers = (handler === undefined
        ? []
        : Array.isArray(handler)
            ? handler
            : [handler]).filter(function (h) { return Boolean(h); });
    if (handlers.length === 0) {
        return undefined;
    }
    return function (e) {
        handlers.forEach(function (handler) {
            var args = {
                type: type,
                button: toButton(e),
                cancel: function () {
                    e.preventDefault();
                    e.stopPropagation();
                },
                _react: e,
            };
            handler(args);
        });
    };
};
var toButton = function (e) {
    var button = e.button;
    switch (button) {
        case 2:
            return 'RIGHT';
        default:
            return 'LEFT';
    }
};
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