devextreme/events/utils.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (events/utils.js)
 * Version: 18.1.3
 * Build date: Tue May 15 2018
 *
 * Copyright (c) 2012 - 2018 Developer Express Inc. ALL RIGHTS RESERVED
 * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
 */

"use strict";
var $ = require("../core/renderer");
var eventsEngine = require("./core/events_engine");
var errors = require("../core/errors");
var focused = require("../ui/widget/selectors").focused;
var extend = require("../core/utils/extend").extend;
var each = require("../core/utils/iterator").each;
var eventSource = function() {
    var EVENT_SOURCES_REGEX = {
        dx: /^dx/i,
        mouse: /(mouse|wheel)/i,
        touch: /^touch/i,
        keyboard: /^key/i,
        pointer: /^(ms)?pointer/i
    };
    return function(e) {
        var result = "other";
        each(EVENT_SOURCES_REGEX, function(key) {
            if (this.test(e.type)) {
                result = key;
                return false
            }
        });
        return result
    }
}();
var isDxEvent = function(e) {
    return "dx" === eventSource(e)
};
var isNativeMouseEvent = function(e) {
    return "mouse" === eventSource(e)
};
var isNativeTouchEvent = function(e) {
    return "touch" === eventSource(e)
};
var isPointerEvent = function(e) {
    return "pointer" === eventSource(e)
};
var isMouseEvent = function(e) {
    return isNativeMouseEvent(e) || (isPointerEvent(e) || isDxEvent(e)) && "mouse" === e.pointerType
};
var isTouchEvent = function(e) {
    return isNativeTouchEvent(e) || (isPointerEvent(e) || isDxEvent(e)) && "touch" === e.pointerType
};
var isKeyboardEvent = function(e) {
    return "keyboard" === eventSource(e)
};
var isFakeClickEvent = function(e) {
    return 0 === e.screenX && !e.offsetX && 0 === e.pageX
};
var eventData = function(e) {
    return {
        x: e.pageX,
        y: e.pageY,
        time: e.timeStamp
    }
};
var eventDelta = function(from, to) {
    return {
        x: to.x - from.x,
        y: to.y - from.y,
        time: to.time - from.time || 1
    }
};
var hasTouches = function(e) {
    if (isNativeTouchEvent(e)) {
        return (e.originalEvent.touches || []).length
    }
    if (isDxEvent(e)) {
        return (e.pointers || []).length
    }
    return 0
};
var needSkipEvent = function(e) {
    var $target = $(e.target);
    var touchInInput = $target.is("input, textarea, select");
    if ($target.is(".dx-skip-gesture-event *, .dx-skip-gesture-event")) {
        return true
    }
    if ("dxmousewheel" === e.type) {
        return $target.is("input[type='number'], textarea, select") && $target.is(":focus")
    }
    if (isMouseEvent(e)) {
        return touchInInput || e.which > 1
    }
    if (isTouchEvent(e)) {
        return touchInInput && focused($target)
    }
};
var fixMethod = function(e) {
    return e
};
var setEventFixMethod = function(func) {
    fixMethod = func
};
var copyEvent = function(originalEvent) {
    return fixMethod(eventsEngine.Event(originalEvent, originalEvent), originalEvent)
};
var createEvent = function(originalEvent, args) {
    var event = copyEvent(originalEvent);
    if (args) {
        extend(event, args)
    }
    return event
};
var fireEvent = function(props) {
    var event = createEvent(props.originalEvent, props);
    eventsEngine.trigger(props.delegateTarget || event.target, event);
    return event
};
var addNamespace = function addNamespace(eventNames, namespace) {
    if (!namespace) {
        throw errors.Error("E0017")
    }
    if ("string" === typeof eventNames) {
        if (eventNames.indexOf(" ") === -1) {
            return eventNames + "." + namespace
        }
        return addNamespace(eventNames.split(/\s+/g), namespace)
    }
    each(eventNames, function(index, eventName) {
        eventNames[index] = eventName + "." + namespace
    });
    return eventNames.join(" ")
};
module.exports = {
    eventSource: eventSource,
    isPointerEvent: isPointerEvent,
    isMouseEvent: isMouseEvent,
    isTouchEvent: isTouchEvent,
    isKeyboardEvent: isKeyboardEvent,
    isFakeClickEvent: isFakeClickEvent,
    hasTouches: hasTouches,
    eventData: eventData,
    eventDelta: eventDelta,
    needSkipEvent: needSkipEvent,
    createEvent: createEvent,
    fireEvent: fireEvent,
    addNamespace: addNamespace,
    setEventFixMethod: setEventFixMethod
};