https://thenews247.net/wp-content/themes/smart-mag/js/jquery.sticky-sidebar.js?ver=10.3.2

1/*!
2 * Theia Sticky Sidebar v1.7.0 (Modified by ThemeSphere)
3 * https://github.com/WeCodePixels/theia-sticky-sidebar
4 *
5 * Glues your website's sidebars, making them permanently visible while scrolling.
6 *
7 * Copyright 2013-2016 WeCodePixels and other contributors
8 * Released under the MIT license
9 */
10
11(function ($) {
12	$.fn.theiaStickySidebar = function (options) {
13		var defaults = {
14			'containerSelector': '',
15			'additionalMarginTop': 0,
16			'additionalMarginBottom': 0,
17			'updateSidebarHeight': true,
18			'minWidth': 0,
19			'disableOnResponsiveLayouts': true,
20			'sidebarBehavior': 'modern',
21			'defaultPosition': 'relative',
22			'namespace': 'TSS'
23		};
24	
25		options = $.extend(defaults, options);
26
27		// Validate options
28		options.additionalMarginTop = parseInt(options.additionalMarginTop) || 0;
29		options.additionalMarginBottom = parseInt(options.additionalMarginBottom) || 0;
30
31		tryInitOrHookIntoEvents(options, this);
32
33		// Try doing init, otherwise hook into window.resize and document.scroll and try again then.
34		function tryInitOrHookIntoEvents(options, $that) {
35			var success = tryInit(options, $that);
36
37			if (!success) {

38				console.log('TSS: Body width smaller than options.minWidth. Init is delayed.');
39
40				$(document).on('scroll.' + options.namespace, function (options, $that) {
41					return function (evt) {
42						var success = tryInit(options, $that);
43
44						if (success) {
45							$(this).unbind(evt);
46						}
47					};
48				}(options, $that));
49				$(window).on('resize.' + options.namespace, function (options, $that) {
50					return function (evt) {
51						var success = tryInit(options, $that);
52
53						if (success) {
54							$(this).unbind(evt);
55						}
56					};
57				}(options, $that))
58			}
59		}
60
61		// Try doing init if proper conditions are met.
62		function tryInit(options, $that) {
63			if (options.initialized === true) {
64				return true;
65			}
66
67			if ($('body').width() < options.minWidth) {
68				return false;
69			}
70
71			init(options, $that);
72
73			return true;
74		}
75
76		// Init the sticky sidebar(s).
77		function init(options, $that) {
78			options.initialized = true;
79
80			// Add CSS
81			var existingStylesheet = $('#theia-sticky-sidebar-stylesheet-' + options.namespace);
82			if (existingStylesheet.length === 0) {
83				$('head').append($('<style id="theia-sticky-sidebar-stylesheet-' + options.namespace + '">.theiaStickySidebar:after {content: ""; display: table; clear: both;}</style>'));
84			}
85
86			$that.each(function () {
87				var o = {};
88
89				o.sidebar = $(this);
90
91				// Save options
92				o.options = options || {};
93				
94				// +EDIT: Options editable.
95				o.sidebar.data('tss-options', o.options);
96
97				// Get container
98				o.container = $(o.options.containerSelector);
99				if (o.container.length == 0) {
100					o.container = o.sidebar.parent();
101				}
102
103				// Create sticky sidebar
104				o.sidebar.parents().css('-webkit-transform', 'none'); // Fix for WebKit bug - https://code.google.com/p/chromium/issues/detail?id=20574
105				o.sidebar.css({
106					'position': o.options.defaultPosition,
107					'overflow': 'visible',
108					// The "box-sizing" must be set to "content-box" because we set a fixed height to this element when the sticky 

108sidebar has a fixed position.
109					'-webkit-box-sizing': 'border-box',
110					'-moz-box-sizing': 'border-box',
111					'box-sizing': 'border-box'
112				});
113
114				// Get the sticky sidebar element. If none has been found, then create one.
115				o.stickySidebar = o.sidebar.find('.theiaStickySidebar');
116				if (o.stickySidebar.length == 0) {
117					// Remove <script> tags, otherwise they will be run again when added to the stickySidebar.
118					var javaScriptMIMETypes = /(?:text|application)\/(?:x-)?(?:javascript|ecmascript)/i;
119					o.sidebar.find('script').filter(function (index, script) {
120						return script.type.length === 0 || script.type.match(javaScriptMIMETypes);
121					}).remove();
122
123					o.stickySidebar = $('<div>').addClass('theiaStickySidebar').append(o.sidebar.children());
124					o.sidebar.append(o.stickySidebar);
125				}
126
127				// Get existing top and bottom margins and paddings
128				o.marginBottom = parseInt(o.sidebar.css('margin-bottom'));
129				o.paddingTop = parseInt(o.sidebar.css('padding-top'));
130				o.paddingBottom = parseInt(o.sidebar.css('padding-bottom'));
131

132				// Add a temporary padding rule to check for collapsable margins.
133				var collapsedTopHeight = o.stickySidebar.offset().top;
134				var collapsedBottomHeight = o.stickySidebar.outerHeight();
135				o.stickySidebar.css('padding-top', 1);
136				o.stickySidebar.css('padding-bottom', 1);
137				collapsedTopHeight -= o.stickySidebar.offset().top;
138				collapsedBottomHeight = o.stickySidebar.outerHeight() - collapsedBottomHeight - collapsedTopHeight;
139				if (collapsedTopHeight == 0) {
140					o.stickySidebar.css('padding-top', 0);
141					o.stickySidebarPaddingTop = 0;
142				}
143				else {
144					o.stickySidebarPaddingTop = 1;
145				}
146
147				if (collapsedBottomHeight == 0) {
148					o.stickySidebar.css('padding-bottom', 0);
149					o.stickySidebarPaddingBottom = 0;
150				}
151				else {
152					o.stickySidebarPaddingBottom = 1;
153				}
154
155				// We use this to know whether the user is scrolling up or down.
156				o.previousScrollTop = null;
157
158				// Scroll top (value) when the sidebar has fixed position.
159				o.fixedScrollTop = 0;
160
161				// Set sidebar to default values.
162				resetSidebar();
163
164				o.onScroll = function (o) {
165					// Stop if the sidebar isn't visible.
166					if (!o.stickySidebar.is(":visible")) {
167						return;
168					}
169
170					// Stop if the window is too small.
171					if ($('body').width() < o.options.minWidth) {
172						resetSidebar();
173						return;
174					}
175
176					// Stop if the sidebar width is larger than the container width (e.g. the theme is responsive and the sidebar is now below the content)
177					if (o.options.disableOnResponsiveLayouts) {
178						var sidebarWidth = o.sidebar.outerWidth(o.sidebar.css('float') == 'none');
179
180						if (sidebarWidth + 50 > o.container.width()) {
181							resetSidebar();
182							return;
183						}
184					}
185
186					var scrollTop = $(document).scrollTop();
187					var position = 'static';
188
189					// If the user has scrolled down enough for the sidebar to be clipped at the top, then we can consider changing its position.
190					if (scrollTop >= o.sidebar.offset().top + (o.paddingTop - o.options.additionalMarginTop)) {
191						// The top and bottom offsets, used in various calculations.
192						var offsetTop = o.paddingTop + options.additionalMarginTop;
193						var offsetBottom = o.paddingBottom + o.marginBottom + options.additionalMarginBottom;
194
195						// All top and bottom positions are relative to the window, not to the parent elemnts.
196						var containerTop = o.sidebar.offset().top;
197						var containerBottom = o.sidebar.offset().top + getClearedHeight(o.container);
198
199						// The top and bottom offsets relative to the window screen top (zero) and bottom (window height).
200						var windowOffsetTop = 0 + options.additionalMarginTop;
201						var windowOffsetBottom;
202
203						var sidebarSmallerThanWindow = (o.stickySidebar.outerHeight() + offsetTop + offsetBottom) < $(window).height();
204						if (sidebarSmallerThanWindow) {
205							windowOffsetBottom = windowOffsetTop + o.stickySidebar.outerHeight();
206						}
207						else {
208							windowOffsetBottom = $(window).height() - o.marginBottom - o.paddingBottom - options.additionalMarginBottom;
209						}
210
211						var staticLimitTop = containerTop - scrollTop + o.paddingTop;
212						var staticLimitBottom = containerBottom - scrollTop - o.paddingBottom - o.marginBottom;
213
214						var top = o.stickySidebar.offset().top - scrollTop;
215						var scrollTopDiff = o.previousScrollTop - scrollTop;
216
217						// If the sidebar position is fixed, then it won't move up or down by itself. So, we manually adjust the top coordinate.
218						if (o.stickySidebar.css('position') == 'fixed') {
219							if (o.options.sidebarBehavior == 'modern') {
220								top += scrollTopDiff;
221							}
222						}
223
224						if (o.options.sidebarBehavior == 'stick-to-top') {
225							top = options.additionalMarginTop;
226						}
227
228						if (o.options.sidebarBehavior == 'stick-to-bottom') {
229							top = windowOffsetBottom - o.stickySidebar.outerHeight();
230						}
231
232						if (scrollTopDiff > 0) { // If the user is scrolling up.
233							top = Math.min(top, windowOffsetTop);
234						}
235						else { // If the user is scrolling down.
236							top = Math.max(top, windowOffsetBottom - o.stickySidebar.outerHeight());
237						}
238
239						top = Math.max(top, staticLimitTop);
240
241						top = Math.min(top, staticLimitBottom - o.stickySidebar.outerHeight());
242
243						// If the sidebar is the same height as the container, we won't use fixed positioning.
244						var sidebarSameHeightAsContainer = o.container.height() == o.stickySidebar.outerHeight();
245
246						if (!sidebarSameHeightAsContainer && top == windowOffsetTop) {
247							position = 'fixed';
248						}
249						else if (!sidebarSameHeightAsContainer && top == windowOffsetBottom - o.stickySidebar.outerHeight()) {
250							position = 'fixed';
251						}
252						else if (scrollTop + top - o.sidebar.offset().top - o.paddingTop <= options.additionalMarginTop) {
253							// Stuck to the top of the page. No special behavior.
254							position = 'static';
255						}
256						else {
257							// Stuck to the bottom of the page.
258							position = 'absolute';
259						}
260					}
261
262					// +EDIT: Subpixel fix.
263					const transY = window.devicePixelRatio < 1.6 ? Math.round : y => y;
264
265					/*

266					 * Performance notice: It's OK to set these CSS values at each resize/scroll, even if they don't change.
267					 * It's way slower to first check if the values have changed.
268					 */
269					if (position == 'fixed') {
270						var scrollLeft = $(document).scrollLeft();
271
272						o.stickySidebar.css({
273							'position': 'fixed',
274							'width': getWidthForObject(o.stickySidebar) + 'px',
275							// +EDIT: Subpixel fix.
276							'transform': 'translateY(' + transY(top) + 'px)',
277							'left': (o.sidebar.offset().left + parseInt(o.sidebar.css('padding-left')) + parseInt(o.sidebar.css('border-left')) - scrollLeft) + 'px',
278							'top': '0px'
279						});
280					}
281					else if (position == 'absolute') {
282						var css = {};
283
284						if (o.stickySidebar.css('position') != 'absolute') {
285							css.position = 'absolute';
286							// +EDIT: Subpixel fix.
287							css.transform = 'translateY(' + transY(scrollTop + top - o.sidebar.offset().top - o.stickySidebarPaddingTop - o.stickySidebarPaddingBottom) + 'px)';
288							css.top = '0px';
289						}
290
291						css.width = getWidthForObject(o.stickySidebar) + 'px';
292						css.left = '';
293
294						o.stickySidebar.css(css);
295					}
296					else if (position == 'static') {
297						resetSidebar();
298					}
299
300					if (position != 'static') {
301						if (o.options.updateSidebarHeight == true) {
302							o.sidebar.css({
303								'min-height': o.stickySidebar.outerHeight() + o.stickySidebar.offset().top - o.sidebar.offset().top + o.paddingBottom
304							});
305						}
306					}
307
308					o.previousScrollTop = scrollTop;
309				};
310
311				// Initialize the sidebar's position.
312				o.onScroll(o);
313
314				// Recalculate the sidebar's position on every scroll and resize.
315				$(document).on('scroll.' + o.options.namespace, function (o) {
316					return function () {
317						o.onScroll(o);
318					};
319				}(o));
320				$(window).on('resize.' + o.options.namespace, function (o) {
321					return function () {
322						o.stickySidebar.css({'position': 'static'});
323						o.onScroll(o);
324					};
325				}(o));
326
327				// Recalculate the sidebar's position every time the sidebar changes its size.
328				if (typeof ResizeSensor !== 'undefined') {
329					new ResizeSensor(o.stickySidebar[0], function (o) {
330						return function () {
331							o.onScroll(o);
332						};
333					}(o));
334				}
335
336				// Reset the sidebar to its default state
337				function resetSidebar() {
338					o.fixedScrollTop = 0;
339					o.sidebar.css({
340						'min-height': '1px'
341					});
342					o.stickySidebar.css({
343						'position': 'static',
344						'width': '',
345						'transform': 'none'
346					});
347				}
348
349				// Get the height of a div as if its floated children were cleared. Note that this function fails if the floats are more than one level deep.
350				function getClearedHeight(e) {
351					var height = e.height();
352
353					e.children().each(function () {
354						height = Math.max(height, $(this).height());
355					});
356
357					return height;
358				}
359			});
360		}
361
362		function getWidthForObject(object) {
363			var width;
364
365			try {
366				width = object[0].getBoundingClientRect().width;
367			}
368			catch (err) {
369			}
370
371			if (typeof width === "undefined") {
372				width = object.width();
373			}
374
375			return width;
376		}
377
378		return this;
379	}
380})(jQuery);