om/node_modules/vuetify/lib/util/helpers.js

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

import Vue from 'vue';
export function createSimpleFunctional(c) {
    var el = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'div';
    var name = arguments[2];

    return Vue.extend({
        name: name || c.replace(/__/g, '-'),
        functional: true,
        render: function render(h, _ref) {
            var data = _ref.data,
                children = _ref.children;

            data.staticClass = (c + ' ' + (data.staticClass || '')).trim();
            return h(el, data, children);
        }
    });
}
function mergeTransitions(transitions, array) {
    if (Array.isArray(transitions)) return transitions.concat(array);
    if (transitions) array.push(transitions);
    return array;
}
export function createSimpleTransition(name) {
    var origin = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'top center 0';
    var mode = arguments[2];

    return {
        name: name,
        functional: true,
        props: {
            group: {
                type: Boolean,
                default: false
            },
            hideOnLeave: {
                type: Boolean,
                default: false
            },
            leaveAbsolute: {
                type: Boolean,
                default: false
            },
            mode: {
                type: String,
                default: mode
            },
            origin: {
                type: String,
                default: origin
            }
        },
        render: function render(h, context) {
            var tag = 'transition' + (context.props.group ? '-group' : '');
            context.data = context.data || {};
            context.data.props = {
                name: name,
                mode: context.props.mode
            };
            context.data.on = context.data.on || {};
            if (!Object.isExtensible(context.data.on)) {
                context.data.on = _extends({}, context.data.on);
            }
            var ourBeforeEnter = [];
            var ourLeave = [];
            var absolute = function absolute(el) {
                return el.style.position = 'absolute';
            };
            ourBeforeEnter.push(function (el) {
                el.style.transformOrigin = context.props.origin;
                el.style.webkitTransformOrigin = context.props.origin;
            });
            if (context.props.leaveAbsolute) ourLeave.push(absolute);
            if (context.props.hideOnLeave) {
                ourLeave.push(function (el) {
                    return el.style.display = 'none';
                });
            }
            var _context$data$on = context.data.on,
                beforeEnter = _context$data$on.beforeEnter,
                leave = _context$data$on.leave;
            // Type says Function | Function[] but
            // will only work if provided a function

            context.data.on.beforeEnter = function () {
                return mergeTransitions(beforeEnter, ourBeforeEnter);
            };
            context.data.on.leave = mergeTransitions(leave, ourLeave);
            return h(tag, context.data, context.children);
        }
    };
}
export function createJavaScriptTransition(name, functions) {
    var mode = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'in-out';

    return {
        name: name,
        functional: true,
        props: {
            mode: {
                type: String,
                default: mode
            }
        },
        render: function render(h, context) {
            var data = {
                props: _extends({}, context.props, {
                    name: name
                }),
                on: functions
            };
            return h('transition', data, context.children);
        }
    };
}
export function directiveConfig(binding) {
    var defaults = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    return _extends({}, defaults, binding.modifiers, {
        value: binding.arg
    }, binding.value || {});
}
export function addOnceEventListener(el, event, cb) {
    var once = function once() {
        cb();
        el.removeEventListener(event, once, false);
    };
    el.addEventListener(event, once, false);
}
var passiveSupported = false;
try {
    if (typeof window !== 'undefined') {
        var testListenerOpts = Object.defineProperty({}, 'passive', {
            get: function get() {
                passiveSupported = true;
            }
        });
        window.addEventListener('testListener', testListenerOpts, testListenerOpts);
        window.removeEventListener('testListener', testListenerOpts, testListenerOpts);
    }
} catch (e) {
    console.warn(e);
}
export { passiveSupported };
export function addPassiveEventListener(el, event, cb, options) {
    el.addEventListener(event, cb, passiveSupported ? options : false);
}
export function getNestedValue(obj, path, fallback) {
    var last = path.length - 1;
    if (last < 0) return obj === undefined ? fallback : obj;
    for (var i = 0; i < last; i++) {
        if (obj == null) {
            return fallback;
        }
        obj = obj[path[i]];
    }
    if (obj == null) return fallback;
    return obj[path[last]] === undefined ? fallback : obj[path[last]];
}
export function deepEqual(a, b) {
    if (a === b) return true;
    if (a instanceof Date && b instanceof Date) {
        // If the values are Date, they were convert to timestamp with getTime and compare it
        if (a.getTime() !== b.getTime()) return false;
    }
    if (a !== Object(a) || b !== Object(b)) {
        // If the values aren't objects, they were already checked for equality
        return false;
    }
    var props = Object.keys(a);
    if (props.length !== Object.keys(b).length) {
        // Different number of props, don't bother to check
        return false;
    }
    return props.every(function (p) {
        return deepEqual(a[p], b[p]);
    });
}
export function getObjectValueByPath(obj, path, fallback) {
    // credit: http://stackoverflow.com/questions/6491463/accessing-nested-javascript-objects-with-string-key#comment55278413_6491621
    if (!path || path.constructor !== String) return fallback;
    path = path.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties
    path = path.replace(/^\./, ''); // strip a leading dot
    return getNestedValue(obj, path.split('.'), fallback);
}
export function getPropertyFromItem(item, property, fallback) {
    if (property == null) return item === undefined ? fallback : item;
    if (item !== Object(item)) return fallback === undefined ? item : fallback;
    if (typeof property === 'string') return getObjectValueByPath(item, property, fallback);
    if (Array.isArray(property)) return getNestedValue(item, property, fallback);
    if (typeof property !== 'function') return fallback;
    var value = property(item, fallback);
    return typeof value === 'undefined' ? fallback : value;
}
export function createRange(length) {
    return Array.from({ length: length }, function (v, k) {
        return k;
    });
}
export function getZIndex(el) {
    if (!el || el.nodeType !== Node.ELEMENT_NODE) return 0;
    var index = +window.getComputedStyle(el).getPropertyValue('z-index');
    if (isNaN(index)) return getZIndex(el.parentNode);
    return index;
}
var tagsToReplace = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;'
};
export function escapeHTML(str) {
    return str.replace(/[&<>]/g, function (tag) {
        return tagsToReplace[tag] || tag;
    });
}
export function filterObjectOnKeys(obj, keys) {
    var filtered = {};
    for (var i = 0; i < keys.length; i++) {
        var key = keys[i];
        if (typeof obj[key] !== 'undefined') {
            filtered[key] = obj[key];
        }
    }
    return filtered;
}
export function filterChildren() {
    var array = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
    var tag = arguments[1];

    return array.filter(function (child) {
        return child.componentOptions && child.componentOptions.Ctor.options.name === tag;
    });
}
export function convertToUnit(str) {
    var unit = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'px';

    if (str == null || str === '') {
        return undefined;
    } else if (isNaN(+str)) {
        return String(str);
    } else {
        return '' + Number(str) + unit;
    }
}
export function kebabCase(str) {
    return (str || '').replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
}
export function isObject(obj) {
    return obj !== null && (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object';
}
// KeyboardEvent.keyCode aliases
export var keyCodes = Object.freeze({
    enter: 13,
    tab: 9,
    delete: 46,
    esc: 27,
    space: 32,
    up: 38,
    down: 40,
    left: 37,
    right: 39,
    end: 35,
    home: 36,
    del: 46,
    backspace: 8,
    insert: 45,
    pageup: 33,
    pagedown: 34
});
var ICONS_PREFIX = '$vuetify.icons.';
// This remaps internal names like '$vuetify.icons.cancel'
// to the current name or component for that icon.
export function remapInternalIcon(vm, iconName) {
    if (!iconName.startsWith(ICONS_PREFIX)) {
        return iconName;
    }
    // Now look up icon indirection name, e.g. '$vuetify.icons.cancel'
    return getObjectValueByPath(vm, iconName, iconName);
}
export function keys(o) {
    return Object.keys(o);
}
/**
 * Camelize a hyphen-delimited string.
 */
var camelizeRE = /-(\w)/g;
export var camelize = function camelize(str) {
    return str.replace(camelizeRE, function (_, c) {
        return c ? c.toUpperCase() : '';
    });
};
/**
 * Returns the set difference of B and A, i.e. the set of elements in B but not in A
 */
export function arrayDiff(a, b) {
    var diff = [];
    for (var i = 0; i < b.length; i++) {
        if (a.indexOf(b[i]) < 0) diff.push(b[i]);
    }
    return diff;
}
/**
 * Makes the first character of a string uppercase
 */
export function upperFirst(str) {
    return str.charAt(0).toUpperCase() + str.slice(1);
}
/**
 * Returns:
 *  - 'normal' for old style slots - `<template slot="default">`
 *  - 'scoped' for old style scoped slots (`<template slot="default" slot-scope="data">`) or bound v-slot (`#default="data"`)
 *  - 'v-slot' for unbound v-slot (`#default`) - only if the third param is true, otherwise counts as scoped
 */
export function getSlotType(vm, name, split) {
    if (vm.$slots[name] && vm.$scopedSlots[name] && vm.$scopedSlots[name].name) {
        return split ? 'v-slot' : 'scoped';
    }
    if (vm.$slots[name]) return 'normal';
    if (vm.$scopedSlots[name]) return 'scoped';
}
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