jQueryResize Library
Verze ze dne
Tento skript by neměl být instalován přímo. Jedná se o knihovnu, kterou by měly jiné skripty využívat pomocí meta příkazu // @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);