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jQueryResize

jQueryResize Library

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/377563/669077/jQueryResize.js 

/*
 * Custom resize jQuery event for element version 1.0.1
 *
 * Copyright (c) 2018 Jakub Jankiewicz <http://jcubic.pl/me>
 * Released under the MIT license
 *
 * based on marcj/css-element-queries same license
 */

/* global jQuery, ResizeObserver */
(function($) {
    "use strict";
    // ----------------------------------------------------------------------------------
    // :: Cross-browser resize element plugin
    // :: Taken from ResizeSensor.js file from marcj/css-element-queries (MIT license)
    // :: updated by jQuery Terminal (same license)
    // :: usage:
    // :: to add callback use:
    // ::     $('node').resize(handler_function);
    // :: to remove use:
    // ::     $('node').resize('unbind', handler_function);
    // :: handler function in unbind is optional if omitted all handlers will be removed
    // ----------------------------------------------------------------------------------
   $.fn.resizer = function(callback) {
        var unbind = arguments[0] === "unbind";
        if (!unbind && !$.isFunction(callback)) {
            throw new Error(
                'Invalid argument, it need to a function or string "unbind".'
            );
        }
        if (unbind) {
            callback = $.isFunction(arguments[1]) ? arguments[1] : null;
        }
        return this.each(function() {
            var $this = $(this);
            var callbacks;
            if (unbind) {
                callbacks = $this.data('callbacks');
                if (callback && callbacks) {
                    callbacks.remove(callback);
                    if (!callbacks.has()) {
                        callbacks = null;
                    }
                } else {
                    callbacks = null;
                }
                if (!callbacks) {
                    $this.removeData('callbacks');
                    if (window.ResizeObserver) {
                        var observer = $this.data('observer');
                        if (observer) {
                            observer.unobserve(this);
                            $this.removeData('observer');
                        }
                    } else {
                        $this.find('.resizer').remove();
                    }
                }
            } else if ($this.data('callbacks')) {
                $this.data('callbacks').add(callback);
            } else {
                callbacks = $.Callbacks();
                callbacks.add(callback);
                $this.data('callbacks', callbacks);
                var resizer;
                var first = true;
                if (window.ResizeObserver) {
                    resizer = new ResizeObserver(function() {
                        if (!first) {
                            var callbacks = $this.data('callbacks');
                            callbacks.fireWith($this[0], $.Event('resize'));
                        }
                        first = false;
                    });
                    resizer.observe(this);
                    $this.data('observer', resizer);
                    return;
                }
                var self = this;
                resizer = $('<div/>').addClass('resizer').appendTo(this)[0];
                var style =
                    'position: absolute; left: 0; top: 0; right: 0; bottom: 0; ' +
                    'overflow: hidden; z-index: -1; visibility: hidden;';
                var styleChild = 'position: absolute; left: 0; top: 0; transition: 0s;';
                resizer.style.cssText = style;
                resizer.innerHTML =
                    '<div class="resize-sensor-expand" style="' + style + '">' +
                    '<div style="' + styleChild + '"></div>' + "</div>" +
                    '<div class="resize-sensor-shrink" style="' + style + '">' +
                    '<div style="' + styleChild + ' width: 200%; height: 200%"></div>' +
                    "</div>";

                var expand = resizer.childNodes[0];
                var expandChild = expand.childNodes[0];
                var shrink = resizer.childNodes[1];
                var dirty, rafId, newWidth, newHeight;
                var lastWidth = self.offsetWidth;
                var lastHeight = self.offsetHeight;

                var reset = function() {
                    expandChild.style.width = '100000px';
                    expandChild.style.height = '100000px';

                    expand.scrollLeft = 100000;
                    expand.scrollTop = 100000;

                    shrink.scrollLeft = 100000;
                    shrink.scrollTop = 100000;
                };

                reset();

                var onResized = function() {
                    rafId = 0;

                    if (!dirty) {
                        return;
                    }

                    lastWidth = newWidth;
                    lastHeight = newHeight;
                    callbacks.fireWith($this[0], $.Event('resize'));
                };

                var onScroll = function() {
                    newWidth = self.offsetWidth;
                    newHeight = self.offsetHeight;
                    dirty = newWidth !== lastWidth || newHeight !== lastHeight;

                    if (dirty && !rafId) {
                        rafId = requestAnimationFrame(onResized);
                    }

                    reset();
                };
                $(expand).on("scroll", onScroll);
                $(shrink).on("scroll", onScroll);
            }
        });
    };
    var window_events = $.Callbacks();
    // custom resize jQuery event with handling of default window resize
    $.event.special.resize = {
        setup: function(data, namespaces, eventHandle) {
            if (this === window) {
                window.addEventListener('resize', eventHandle);
            }
        },
        teardown: function() {
            window.removeEventListener('resize');
        },
        add: function(handleObj) {
            if (this === window) {
                window_events.add(handleObj.handler);
            } else {
                $(this).resizer(handleObj.handler);
            }
        },
        remove: function(handleObj) {
            if (this === window) {
                if (!handleObj.handler) {
                    window_events.empty();
                } else {
                    window_events.remove(handleObj.handler);
                }
            } else {
                $(this).resizer('unbind', handleObj.handler);
            }
        },
        handle: function(event, data) {
            window_events.fireWith(window, event, data);
        }
    };
})(jQuery);