495 lines
16 KiB
JavaScript
495 lines
16 KiB
JavaScript
'use strict';
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
!function ($) {
|
|
|
|
/**
|
|
* Sticky module.
|
|
* @module foundation.sticky
|
|
* @requires foundation.util.triggers
|
|
* @requires foundation.util.mediaQuery
|
|
*/
|
|
|
|
var Sticky = function () {
|
|
/**
|
|
* Creates a new instance of a sticky thing.
|
|
* @class
|
|
* @param {jQuery} element - jQuery object to make sticky.
|
|
* @param {Object} options - options object passed when creating the element programmatically.
|
|
*/
|
|
|
|
function Sticky(element, options) {
|
|
_classCallCheck(this, Sticky);
|
|
|
|
this.$element = element;
|
|
this.options = $.extend({}, Sticky.defaults, this.$element.data(), options);
|
|
|
|
this._init();
|
|
|
|
Foundation.registerPlugin(this, 'Sticky');
|
|
}
|
|
|
|
/**
|
|
* Initializes the sticky element by adding classes, getting/setting dimensions, breakpoints and attributes
|
|
* @function
|
|
* @private
|
|
*/
|
|
|
|
|
|
_createClass(Sticky, [{
|
|
key: '_init',
|
|
value: function _init() {
|
|
var $parent = this.$element.parent('[data-sticky-container]'),
|
|
id = this.$element[0].id || Foundation.GetYoDigits(6, 'sticky'),
|
|
_this = this;
|
|
|
|
if (!$parent.length) {
|
|
this.wasWrapped = true;
|
|
}
|
|
this.$container = $parent.length ? $parent : $(this.options.container).wrapInner(this.$element);
|
|
this.$container.addClass(this.options.containerClass);
|
|
|
|
this.$element.addClass(this.options.stickyClass).attr({ 'data-resize': id });
|
|
|
|
this.scrollCount = this.options.checkEvery;
|
|
this.isStuck = false;
|
|
$(window).one('load.zf.sticky', function () {
|
|
if (_this.options.anchor !== '') {
|
|
_this.$anchor = $('#' + _this.options.anchor);
|
|
} else {
|
|
_this._parsePoints();
|
|
}
|
|
|
|
_this._setSizes(function () {
|
|
_this._calc(false);
|
|
});
|
|
_this._events(id.split('-').reverse().join('-'));
|
|
});
|
|
}
|
|
|
|
/**
|
|
* If using multiple elements as anchors, calculates the top and bottom pixel values the sticky thing should stick and unstick on.
|
|
* @function
|
|
* @private
|
|
*/
|
|
|
|
}, {
|
|
key: '_parsePoints',
|
|
value: function _parsePoints() {
|
|
var top = this.options.topAnchor == "" ? 1 : this.options.topAnchor,
|
|
btm = this.options.btmAnchor == "" ? document.documentElement.scrollHeight : this.options.btmAnchor,
|
|
pts = [top, btm],
|
|
breaks = {};
|
|
for (var i = 0, len = pts.length; i < len && pts[i]; i++) {
|
|
var pt;
|
|
if (typeof pts[i] === 'number') {
|
|
pt = pts[i];
|
|
} else {
|
|
var place = pts[i].split(':'),
|
|
anchor = $('#' + place[0]);
|
|
|
|
pt = anchor.offset().top;
|
|
if (place[1] && place[1].toLowerCase() === 'bottom') {
|
|
pt += anchor[0].getBoundingClientRect().height;
|
|
}
|
|
}
|
|
breaks[i] = pt;
|
|
}
|
|
|
|
this.points = breaks;
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Adds event handlers for the scrolling element.
|
|
* @private
|
|
* @param {String} id - psuedo-random id for unique scroll event listener.
|
|
*/
|
|
|
|
}, {
|
|
key: '_events',
|
|
value: function _events(id) {
|
|
var _this = this,
|
|
scrollListener = this.scrollListener = 'scroll.zf.' + id;
|
|
if (this.isOn) {
|
|
return;
|
|
}
|
|
if (this.canStick) {
|
|
this.isOn = true;
|
|
$(window).off(scrollListener).on(scrollListener, function (e) {
|
|
if (_this.scrollCount === 0) {
|
|
_this.scrollCount = _this.options.checkEvery;
|
|
_this._setSizes(function () {
|
|
_this._calc(false, window.pageYOffset);
|
|
});
|
|
} else {
|
|
_this.scrollCount--;
|
|
_this._calc(false, window.pageYOffset);
|
|
}
|
|
});
|
|
}
|
|
|
|
this.$element.off('resizeme.zf.trigger').on('resizeme.zf.trigger', function (e, el) {
|
|
_this._setSizes(function () {
|
|
_this._calc(false);
|
|
if (_this.canStick) {
|
|
if (!_this.isOn) {
|
|
_this._events(id);
|
|
}
|
|
} else if (_this.isOn) {
|
|
_this._pauseListeners(scrollListener);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Removes event handlers for scroll and change events on anchor.
|
|
* @fires Sticky#pause
|
|
* @param {String} scrollListener - unique, namespaced scroll listener attached to `window`
|
|
*/
|
|
|
|
}, {
|
|
key: '_pauseListeners',
|
|
value: function _pauseListeners(scrollListener) {
|
|
this.isOn = false;
|
|
$(window).off(scrollListener);
|
|
|
|
/**
|
|
* Fires when the plugin is paused due to resize event shrinking the view.
|
|
* @event Sticky#pause
|
|
* @private
|
|
*/
|
|
this.$element.trigger('pause.zf.sticky');
|
|
}
|
|
|
|
/**
|
|
* Called on every `scroll` event and on `_init`
|
|
* fires functions based on booleans and cached values
|
|
* @param {Boolean} checkSizes - true if plugin should recalculate sizes and breakpoints.
|
|
* @param {Number} scroll - current scroll position passed from scroll event cb function. If not passed, defaults to `window.pageYOffset`.
|
|
*/
|
|
|
|
}, {
|
|
key: '_calc',
|
|
value: function _calc(checkSizes, scroll) {
|
|
if (checkSizes) {
|
|
this._setSizes();
|
|
}
|
|
|
|
if (!this.canStick) {
|
|
if (this.isStuck) {
|
|
this._removeSticky(true);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (!scroll) {
|
|
scroll = window.pageYOffset;
|
|
}
|
|
|
|
if (scroll >= this.topPoint) {
|
|
if (scroll <= this.bottomPoint) {
|
|
if (!this.isStuck) {
|
|
this._setSticky();
|
|
}
|
|
} else {
|
|
if (this.isStuck) {
|
|
this._removeSticky(false);
|
|
}
|
|
}
|
|
} else {
|
|
if (this.isStuck) {
|
|
this._removeSticky(true);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Causes the $element to become stuck.
|
|
* Adds `position: fixed;`, and helper classes.
|
|
* @fires Sticky#stuckto
|
|
* @function
|
|
* @private
|
|
*/
|
|
|
|
}, {
|
|
key: '_setSticky',
|
|
value: function _setSticky() {
|
|
var _this = this,
|
|
stickTo = this.options.stickTo,
|
|
mrgn = stickTo === 'top' ? 'marginTop' : 'marginBottom',
|
|
notStuckTo = stickTo === 'top' ? 'bottom' : 'top',
|
|
css = {};
|
|
|
|
css[mrgn] = this.options[mrgn] + 'em';
|
|
css[stickTo] = 0;
|
|
css[notStuckTo] = 'auto';
|
|
css['left'] = this.$container.offset().left + parseInt(window.getComputedStyle(this.$container[0])["padding-left"], 10);
|
|
this.isStuck = true;
|
|
this.$element.removeClass('is-anchored is-at-' + notStuckTo).addClass('is-stuck is-at-' + stickTo).css(css)
|
|
/**
|
|
* Fires when the $element has become `position: fixed;`
|
|
* Namespaced to `top` or `bottom`, e.g. `sticky.zf.stuckto:top`
|
|
* @event Sticky#stuckto
|
|
*/
|
|
.trigger('sticky.zf.stuckto:' + stickTo);
|
|
this.$element.on("transitionend webkitTransitionEnd oTransitionEnd otransitionend MSTransitionEnd", function () {
|
|
_this._setSizes();
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Causes the $element to become unstuck.
|
|
* Removes `position: fixed;`, and helper classes.
|
|
* Adds other helper classes.
|
|
* @param {Boolean} isTop - tells the function if the $element should anchor to the top or bottom of its $anchor element.
|
|
* @fires Sticky#unstuckfrom
|
|
* @private
|
|
*/
|
|
|
|
}, {
|
|
key: '_removeSticky',
|
|
value: function _removeSticky(isTop) {
|
|
var stickTo = this.options.stickTo,
|
|
stickToTop = stickTo === 'top',
|
|
css = {},
|
|
anchorPt = (this.points ? this.points[1] - this.points[0] : this.anchorHeight) - this.elemHeight,
|
|
mrgn = stickToTop ? 'marginTop' : 'marginBottom',
|
|
notStuckTo = stickToTop ? 'bottom' : 'top',
|
|
topOrBottom = isTop ? 'top' : 'bottom';
|
|
|
|
css[mrgn] = 0;
|
|
|
|
css['bottom'] = 'auto';
|
|
if (isTop) {
|
|
css['top'] = 0;
|
|
} else {
|
|
css['top'] = anchorPt;
|
|
}
|
|
|
|
css['left'] = '';
|
|
this.isStuck = false;
|
|
this.$element.removeClass('is-stuck is-at-' + stickTo).addClass('is-anchored is-at-' + topOrBottom).css(css)
|
|
/**
|
|
* Fires when the $element has become anchored.
|
|
* Namespaced to `top` or `bottom`, e.g. `sticky.zf.unstuckfrom:bottom`
|
|
* @event Sticky#unstuckfrom
|
|
*/
|
|
.trigger('sticky.zf.unstuckfrom:' + topOrBottom);
|
|
}
|
|
|
|
/**
|
|
* Sets the $element and $container sizes for plugin.
|
|
* Calls `_setBreakPoints`.
|
|
* @param {Function} cb - optional callback function to fire on completion of `_setBreakPoints`.
|
|
* @private
|
|
*/
|
|
|
|
}, {
|
|
key: '_setSizes',
|
|
value: function _setSizes(cb) {
|
|
this.canStick = Foundation.MediaQuery.atLeast(this.options.stickyOn);
|
|
if (!this.canStick) {
|
|
cb();
|
|
}
|
|
var _this = this,
|
|
newElemWidth = this.$container[0].getBoundingClientRect().width,
|
|
comp = window.getComputedStyle(this.$container[0]),
|
|
pdng = parseInt(comp['padding-right'], 10);
|
|
|
|
if (this.$anchor && this.$anchor.length) {
|
|
this.anchorHeight = this.$anchor[0].getBoundingClientRect().height;
|
|
} else {
|
|
this._parsePoints();
|
|
}
|
|
|
|
this.$element.css({
|
|
'max-width': newElemWidth - pdng + 'px'
|
|
});
|
|
|
|
var newContainerHeight = this.$element[0].getBoundingClientRect().height || this.containerHeight;
|
|
if (this.$element.css("display") == "none") {
|
|
newContainerHeight = 0;
|
|
}
|
|
this.containerHeight = newContainerHeight;
|
|
this.$container.css({
|
|
height: newContainerHeight
|
|
});
|
|
this.elemHeight = newContainerHeight;
|
|
|
|
if (this.isStuck) {
|
|
this.$element.css({ "left": this.$container.offset().left + parseInt(comp['padding-left'], 10) });
|
|
}
|
|
|
|
this._setBreakPoints(newContainerHeight, function () {
|
|
if (cb) {
|
|
cb();
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Sets the upper and lower breakpoints for the element to become sticky/unsticky.
|
|
* @param {Number} elemHeight - px value for sticky.$element height, calculated by `_setSizes`.
|
|
* @param {Function} cb - optional callback function to be called on completion.
|
|
* @private
|
|
*/
|
|
|
|
}, {
|
|
key: '_setBreakPoints',
|
|
value: function _setBreakPoints(elemHeight, cb) {
|
|
if (!this.canStick) {
|
|
if (cb) {
|
|
cb();
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
var mTop = emCalc(this.options.marginTop),
|
|
mBtm = emCalc(this.options.marginBottom),
|
|
topPoint = this.points ? this.points[0] : this.$anchor.offset().top,
|
|
bottomPoint = this.points ? this.points[1] : topPoint + this.anchorHeight,
|
|
|
|
// topPoint = this.$anchor.offset().top || this.points[0],
|
|
// bottomPoint = topPoint + this.anchorHeight || this.points[1],
|
|
winHeight = window.innerHeight;
|
|
|
|
if (this.options.stickTo === 'top') {
|
|
topPoint -= mTop;
|
|
bottomPoint -= elemHeight + mTop;
|
|
} else if (this.options.stickTo === 'bottom') {
|
|
topPoint -= winHeight - (elemHeight + mBtm);
|
|
bottomPoint -= winHeight - mBtm;
|
|
} else {
|
|
//this would be the stickTo: both option... tricky
|
|
}
|
|
|
|
this.topPoint = topPoint;
|
|
this.bottomPoint = bottomPoint;
|
|
|
|
if (cb) {
|
|
cb();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Destroys the current sticky element.
|
|
* Resets the element to the top position first.
|
|
* Removes event listeners, JS-added css properties and classes, and unwraps the $element if the JS added the $container.
|
|
* @function
|
|
*/
|
|
|
|
}, {
|
|
key: 'destroy',
|
|
value: function destroy() {
|
|
this._removeSticky(true);
|
|
|
|
this.$element.removeClass(this.options.stickyClass + ' is-anchored is-at-top').css({
|
|
height: '',
|
|
top: '',
|
|
bottom: '',
|
|
'max-width': ''
|
|
}).off('resizeme.zf.trigger');
|
|
if (this.$anchor && this.$anchor.length) {
|
|
this.$anchor.off('change.zf.sticky');
|
|
}
|
|
$(window).off(this.scrollListener);
|
|
|
|
if (this.wasWrapped) {
|
|
this.$element.unwrap();
|
|
} else {
|
|
this.$container.removeClass(this.options.containerClass).css({
|
|
height: ''
|
|
});
|
|
}
|
|
Foundation.unregisterPlugin(this);
|
|
}
|
|
}]);
|
|
|
|
return Sticky;
|
|
}();
|
|
|
|
Sticky.defaults = {
|
|
/**
|
|
* Customizable container template. Add your own classes for styling and sizing.
|
|
* @option
|
|
* @example '<div data-sticky-container class="small-6 columns"></div>'
|
|
*/
|
|
container: '<div data-sticky-container></div>',
|
|
/**
|
|
* Location in the view the element sticks to.
|
|
* @option
|
|
* @example 'top'
|
|
*/
|
|
stickTo: 'top',
|
|
/**
|
|
* If anchored to a single element, the id of that element.
|
|
* @option
|
|
* @example 'exampleId'
|
|
*/
|
|
anchor: '',
|
|
/**
|
|
* If using more than one element as anchor points, the id of the top anchor.
|
|
* @option
|
|
* @example 'exampleId:top'
|
|
*/
|
|
topAnchor: '',
|
|
/**
|
|
* If using more than one element as anchor points, the id of the bottom anchor.
|
|
* @option
|
|
* @example 'exampleId:bottom'
|
|
*/
|
|
btmAnchor: '',
|
|
/**
|
|
* Margin, in `em`'s to apply to the top of the element when it becomes sticky.
|
|
* @option
|
|
* @example 1
|
|
*/
|
|
marginTop: 1,
|
|
/**
|
|
* Margin, in `em`'s to apply to the bottom of the element when it becomes sticky.
|
|
* @option
|
|
* @example 1
|
|
*/
|
|
marginBottom: 1,
|
|
/**
|
|
* Breakpoint string that is the minimum screen size an element should become sticky.
|
|
* @option
|
|
* @example 'medium'
|
|
*/
|
|
stickyOn: 'medium',
|
|
/**
|
|
* Class applied to sticky element, and removed on destruction. Foundation defaults to `sticky`.
|
|
* @option
|
|
* @example 'sticky'
|
|
*/
|
|
stickyClass: 'sticky',
|
|
/**
|
|
* Class applied to sticky container. Foundation defaults to `sticky-container`.
|
|
* @option
|
|
* @example 'sticky-container'
|
|
*/
|
|
containerClass: 'sticky-container',
|
|
/**
|
|
* Number of scroll events between the plugin's recalculating sticky points. Setting it to `0` will cause it to recalc every scroll event, setting it to `-1` will prevent recalc on scroll.
|
|
* @option
|
|
* @example 50
|
|
*/
|
|
checkEvery: -1
|
|
};
|
|
|
|
/**
|
|
* Helper function to calculate em values
|
|
* @param Number {em} - number of em's to calculate into pixels
|
|
*/
|
|
function emCalc(em) {
|
|
return parseInt(window.getComputedStyle(document.body, null).fontSize, 10) * em;
|
|
}
|
|
|
|
// Window exports
|
|
Foundation.plugin(Sticky, 'Sticky');
|
|
}(jQuery); |