'use strict';
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; };
/**
* @fileOverview Kickass library to create and place poppers near their reference elements.
* @version {{version}}
* @license
* Copyright (c) 2016 Federico Zivolo and contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
//
// Cross module loader
// Supported: Node, AMD, Browser globals
//
;(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define(factory);
} else if ((typeof module === 'undefined' ? 'undefined' : _typeof(module)) === 'object' && module.exports) {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like environments that support module.exports,
// like Node.
module.exports = factory();
} else {
// Browser globals (root is window)
root.Popper = factory();
}
})(undefined, function () {
'use strict';
var root = window;
// default options
var DEFAULTS = {
// placement of the popper
placement: 'bottom',
gpuAcceleration: true,
// shift popper from its origin by the given amount of pixels (can be negative)
offset: 0,
// the element which will act as boundary of the popper
boundariesElement: 'viewport',
// amount of pixel used to define a minimum distance between the boundaries and the popper
boundariesPadding: 5,
// popper will try to prevent overflow following this order,
// by default, then, it could overflow on the left and on top of the boundariesElement
preventOverflowOrder: ['left', 'right', 'top', 'bottom'],
// the behavior used by flip to change the placement of the popper
flipBehavior: 'flip',
arrowElement: '[x-arrow]',
arrowOffset: 0,
// list of functions used to modify the offsets before they are applied to the popper
modifiers: ['shift', 'offset', 'preventOverflow', 'keepTogether', 'arrow', 'flip', 'applyStyle'],
modifiersIgnored: [],
forceAbsolute: false
};
/**
* Create a new Popper.js instance
* @constructor Popper
* @param {HTMLElement} reference - The reference element used to position the popper
* @param {HTMLElement|Object} popper
* The HTML element used as popper, or a configuration used to generate the popper.
* @param {String} [popper.tagName='div'] The tag name of the generated popper.
* @param {Array} [popper.classNames=['popper']] Array of classes to apply to the generated popper.
* @param {Array} [popper.attributes] Array of attributes to apply, specify `attr:value` to assign a value to it.
* @param {HTMLElement|String} [popper.parent=window.document.body] The parent element, given as HTMLElement or as query string.
* @param {String} [popper.content=''] The content of the popper, it can be text, html, or node; if it is not text, set `contentType` to `html` or `node`.
* @param {String} [popper.contentType='text'] If `html`, the `content` will be parsed as HTML. If `node`, it will be appended as-is.
* @param {String} [popper.arrowTagName='div'] Same as `popper.tagName` but for the arrow element.
* @param {Array} [popper.arrowClassNames='popper__arrow'] Same as `popper.classNames` but for the arrow element.
* @param {String} [popper.arrowAttributes=['x-arrow']] Same as `popper.attributes` but for the arrow element.
* @param {Object} options
* @param {String} [options.placement=bottom]
* Placement of the popper accepted values: `top(-start, -end), right(-start, -end), bottom(-start, -right),
* left(-start, -end)`
*
* @param {HTMLElement|String} [options.arrowElement='[x-arrow]']
* The DOM Node used as arrow for the popper, or a CSS selector used to get the DOM node. It must be child of
* its parent Popper. Popper.js will apply to the given element the style required to align the arrow with its
* reference element.
* By default, it will look for a child node of the popper with the `x-arrow` attribute.
*
* @param {Boolean} [options.gpuAcceleration=true]
* When this property is set to true, the popper position will be applied using CSS3 translate3d, allowing the
* browser to use the GPU to accelerate the rendering.
* If set to false, the popper will be placed using `top` and `left` properties, not using the GPU.
*
* @param {Number} [options.offset=0]
* Amount of pixels the popper will be shifted (can be negative).
*
* @param {String|Element} [options.boundariesElement='viewport']
* The element which will define the boundaries of the popper position, the popper will never be placed outside
* of the defined boundaries (except if `keepTogether` is enabled)
*
* @param {Number} [options.boundariesPadding=5]
* Additional padding for the boundaries
*
* @param {Array} [options.preventOverflowOrder=['left', 'right', 'top', 'bottom']]
* Order used when Popper.js tries to avoid overflows from the boundaries, they will be checked in order,
* this means that the last ones will never overflow
*
* @param {String|Array} [options.flipBehavior='flip']
* The behavior used by the `flip` modifier to change the placement of the popper when the latter is trying to
* overlap its reference element. Defining `flip` as value, the placement will be flipped on
* its axis (`right - left`, `top - bottom`).
* You can even pass an array of placements (eg: `['right', 'left', 'top']` ) to manually specify
* how alter the placement when a flip is needed. (eg. in the above example, it would first flip from right to left,
* then, if even in its new placement, the popper is overlapping its reference element, it will be moved to top)
*
* @param {Array} [options.modifiers=[ 'shift', 'offset', 'preventOverflow', 'keepTogether', 'arrow', 'flip', 'applyStyle']]
* List of functions used to modify the data before they are applied to the popper, add your custom functions
* to this array to edit the offsets and placement.
* The function should reflect the @params and @returns of preventOverflow
*
* @param {Array} [options.modifiersIgnored=[]]
* Put here any built-in modifier name you want to exclude from the modifiers list
* The function should reflect the @params and @returns of preventOverflow
*
* @param {Boolean} [options.removeOnDestroy=false]
* Set to true if you want to automatically remove the popper when you call the `destroy` method.
*/
function Popper(reference, popper, options) {
this._reference = reference.jquery ? reference[0] : reference;
this.state = {};
// if the popper variable is a configuration object, parse it to generate an HTMLElement
// generate a default popper if is not defined
var isNotDefined = typeof popper === 'undefined' || popper === null;
var isConfig = popper && Object.prototype.toString.call(popper) === '[object Object]';
if (isNotDefined || isConfig) {
this._popper = this.parse(isConfig ? popper : {});
}
// otherwise, use the given HTMLElement as popper
else {
this._popper = popper.jquery ? popper[0] : popper;
}
// with {} we create a new object with the options inside it
this._options = Object.assign({}, DEFAULTS, options);
// refactoring modifiers' list
this._options.modifiers = this._options.modifiers.map(function (modifier) {
// remove ignored modifiers
if (this._options.modifiersIgnored.indexOf(modifier) !== -1) return;
// set the x-placement attribute before everything else because it could be used to add margins to the popper
// margins needs to be calculated to get the correct popper offsets
if (modifier === 'applyStyle') {
this._popper.setAttribute('x-placement', this._options.placement);
}
// return predefined modifier identified by string or keep the custom one
return this.modifiers[modifier] || modifier;
}.bind(this));
// make sure to apply the popper position before any computation
this.state.position = this._getPosition(this._popper, this._reference);
setStyle(this._popper, { position: this.state.position, top: 0 });
// fire the first update to position the popper in the right place
this.update();
// setup event listeners, they will take care of update the position in specific situations
this._setupEventListeners();
return this;
}
//
// Methods
//
/**
* Destroy the popper
* @method
* @memberof Popper
*/
Popper.prototype.destroy = function () {
this._popper.removeAttribute('x-placement');
this._popper.style.left = '';
this._popper.style.position = '';
this._popper.style.top = '';
this._popper.style[getSupportedPropertyName('transform')] = '';
this._removeEventListeners();
// remove the popper if user explicity asked for the deletion on destroy
if (this._options.removeOnDestroy) {
this._popper.remove();
}
return this;
};
/**
* Updates the position of the popper, computing the new offsets and applying the new style
* @method
* @memberof Popper
*/
Popper.prototype.update = function () {
var data = { instance: this, styles: {} };
// store placement inside the data object, modifiers will be able to edit `placement` if needed
// and refer to _originalPlacement to know the original value
data.placement = this._options.placement;
data._originalPlacement = this._options.placement;
// compute the popper and reference offsets and put them inside data.offsets
data.offsets = this._getOffsets(this._popper, this._reference, data.placement);
// get boundaries
data.boundaries = this._getBoundaries(data, this._options.boundariesPadding, this._options.boundariesElement);
data = this.runModifiers(data, this._options.modifiers);
if (typeof this.state.updateCallback === 'function') {
this.state.updateCallback(data);
}
};
/**
* If a function is passed, it will be executed after the initialization of popper with as first argument the Popper instance.
* @method
* @memberof Popper
* @param {Function} callback
*/
Popper.prototype.onCreate = function (callback) {
// the createCallbacks return as first argument the popper instance
callback(this);
return this;
};
/**
* If a function is passed, it will be executed after each update of popper with as first argument the set of coordinates and informations
* used to style popper and its arrow.
* NOTE: it doesn't get fired on the first call of the `Popper.update()` method inside the `Popper` constructor!
* @method
* @memberof Popper
* @param {Function} callback
*/
Popper.prototype.onUpdate = function (callback) {
this.state.updateCallback = callback;
return this;
};
/**
* Helper used to generate poppers from a configuration file
* @method
* @memberof Popper
* @param config {Object} configuration
* @returns {HTMLElement} popper
*/
Popper.prototype.parse = function (config) {
var defaultConfig = {
tagName: 'div',
classNames: ['popper'],
attributes: [],
parent: root.document.body,
content: '',
contentType: 'text',
arrowTagName: 'div',
arrowClassNames: ['popper__arrow'],
arrowAttributes: ['x-arrow']
};
config = Object.assign({}, defaultConfig, config);
var d = root.document;
var popper = d.createElement(config.tagName);
addClassNames(popper, config.classNames);
addAttributes(popper, config.attributes);
if (config.contentType === 'node') {
popper.appendChild(config.content.jquery ? config.content[0] : config.content);
} else if (config.contentType === 'html') {
popper.innerHTML = config.content;
} else {
popper.textContent = config.content;
}
if (config.arrowTagName) {
var arrow = d.createElement(config.arrowTagName);
addClassNames(arrow, config.arrowClassNames);
addAttributes(arrow, config.arrowAttributes);
popper.appendChild(arrow);
}
var parent = config.parent.jquery ? config.parent[0] : config.parent;
// if the given parent is a string, use it to match an element
// if more than one element is matched, the first one will be used as parent
// if no elements are matched, the script will throw an error
if (typeof parent === 'string') {
parent = d.querySelectorAll(config.parent);
if (parent.length > 1) {
console.warn('WARNING: the given `parent` query(' + config.parent + ') matched more than one element, the first one will be used');
}
if (parent.length === 0) {
throw 'ERROR: the given `parent` doesn\'t exists!';
}
parent = parent[0];
}
// if the given parent is a DOM nodes list or an array of nodes with more than one element,
// the first one will be used as parent
if (parent.length > 1 && parent instanceof Element === false) {
console.warn('WARNING: you have passed as parent a list of elements, the first one will be used');
parent = parent[0];
}
// append the generated popper to its parent
parent.appendChild(popper);
return popper;
/**
* Adds class names to the given element
* @function
* @ignore
* @param {HTMLElement} target
* @param {Array} classes
*/
function addClassNames(element, classNames) {
classNames.forEach(function (className) {
element.classList.add(className);
});
}
/**
* Adds attributes to the given element
* @function
* @ignore
* @param {HTMLElement} target
* @param {Array} attributes
* @example
* addAttributes(element, [ 'data-info:foobar' ]);
*/
function addAttributes(element, attributes) {
attributes.forEach(function (attribute) {
element.setAttribute(attribute.split(':')[0], attribute.split(':')[1] || '');
});
}
};
/**
* Helper used to get the position which will be applied to the popper
* @method
* @memberof Popper
* @param config {HTMLElement} popper element
* @param reference {HTMLElement} reference element
* @returns {String} position
*/
Popper.prototype._getPosition = function (popper, reference) {
var container = getOffsetParent(reference);
if (this._options.forceAbsolute) {
return 'absolute';
}
// Decide if the popper will be fixed
// If the reference element is inside a fixed context, the popper will be fixed as well to allow them to scroll together
var isParentFixed = isFixed(reference, container);
return isParentFixed ? 'fixed' : 'absolute';
};
/**
* Get offsets to the popper
* @method
* @memberof Popper
* @access private
* @param {Element} popper - the popper element
* @param {Element} reference - the reference element (the popper will be relative to this)
* @returns {Object} An object containing the offsets which will be applied to the popper
*/
Popper.prototype._getOffsets = function (popper, reference, placement) {
placement = placement.split('-')[0];
var popperOffsets = {};
popperOffsets.position = this.state.position;
var isParentFixed = popperOffsets.position === 'fixed';
//
// Get reference element position
//
var referenceOffsets = getOffsetRectRelativeToCustomParent(reference, getOffsetParent(popper), isParentFixed);
//
// Get popper sizes
//
var popperRect = getOuterSizes(popper);
//
// Compute offsets of popper
//
// depending by the popper placement we have to compute its offsets slightly differently
if (['right', 'left'].indexOf(placement) !== -1) {
popperOffsets.top = referenceOffsets.top + referenceOffsets.height / 2 - popperRect.height / 2;
if (placement === 'left') {
popperOffsets.left = referenceOffsets.left - popperRect.width;
} else {
popperOffsets.left = referenceOffsets.right;
}
} else {
popperOffsets.left = referenceOffsets.left + referenceOffsets.width / 2 - popperRect.width / 2;
if (placement === 'top') {
popperOffsets.top = referenceOffsets.top - popperRect.height;
} else {
popperOffsets.top = referenceOffsets.bottom;
}
}
// Add width and height to our offsets object
popperOffsets.width = popperRect.width;
popperOffsets.height = popperRect.height;
return {
popper: popperOffsets,
reference: referenceOffsets
};
};
/**
* Setup needed event listeners used to update the popper position
* @method
* @memberof Popper
* @access private
*/
Popper.prototype._setupEventListeners = function () {
// NOTE: 1 DOM access here
this.state.updateBound = this.update.bind(this);
root.addEventListener('resize', this.state.updateBound);
// if the boundariesElement is window we don't need to listen for the scroll event
if (this._options.boundariesElement !== 'window') {
var target = getScrollParent(this._reference);
// here it could be both `body` or `documentElement` thanks to Firefox, we then check both
if (target === root.document.body || target === root.document.documentElement) {
target = root;
}
target.addEventListener('scroll', this.state.updateBound);
this.state.scrollTarget = target;
}
};
/**
* Remove event listeners used to update the popper position
* @method
* @memberof Popper
* @access private
*/
Popper.prototype._removeEventListeners = function () {
// NOTE: 1 DOM access here
root.removeEventListener('resize', this.state.updateBound);
if (this._options.boundariesElement !== 'window' && this.state.scrollTarget) {
this.state.scrollTarget.removeEventListener('scroll', this.state.updateBound);
this.state.scrollTarget = null;
}
this.state.updateBound = null;
};
/**
* Computed the boundaries limits and return them
* @method
* @memberof Popper
* @access private
* @param {Object} data - Object containing the property "offsets" generated by `_getOffsets`
* @param {Number} padding - Boundaries padding
* @param {Element} boundariesElement - Element used to define the boundaries
* @returns {Object} Coordinates of the boundaries
*/
Popper.prototype._getBoundaries = function (data, padding, boundariesElement) {
// NOTE: 1 DOM access here
var boundaries = {};
var width, height;
if (boundariesElement === 'window') {
var body = root.document.body,
html = root.document.documentElement;
height = Math.max(body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight);
width = Math.max(body.scrollWidth, body.offsetWidth, html.clientWidth, html.scrollWidth, html.offsetWidth);
boundaries = {
top: 0,
right: width,
bottom: height,
left: 0
};
} else if (boundariesElement === 'viewport') {
var offsetParent = getOffsetParent(this._popper);
var scrollParent = getScrollParent(this._popper);
var offsetParentRect = getOffsetRect(offsetParent);
// Thanks the fucking native API, `document.body.scrollTop` & `document.documentElement.scrollTop`
var getScrollTopValue = function getScrollTopValue(element) {
return element == document.body ? Math.max(document.documentElement.scrollTop, document.body.scrollTop) : element.scrollTop;
};
var getScrollLeftValue = function getScrollLeftValue(element) {
return element == document.body ? Math.max(document.documentElement.scrollLeft, document.body.scrollLeft) : element.scrollLeft;
};
// if the popper is fixed we don't have to substract scrolling from the boundaries
var scrollTop = data.offsets.popper.position === 'fixed' ? 0 : getScrollTopValue(scrollParent);
var scrollLeft = data.offsets.popper.position === 'fixed' ? 0 : getScrollLeftValue(scrollParent);
boundaries = {
top: 0 - (offsetParentRect.top - scrollTop),
right: root.document.documentElement.clientWidth - (offsetParentRect.left - scrollLeft),
bottom: root.document.documentElement.clientHeight - (offsetParentRect.top - scrollTop),
left: 0 - (offsetParentRect.left - scrollLeft)
};
} else {
if (getOffsetParent(this._popper) === boundariesElement) {
boundaries = {
top: 0,
left: 0,
right: boundariesElement.clientWidth,
bottom: boundariesElement.clientHeight
};
} else {
boundaries = getOffsetRect(boundariesElement);
}
}
boundaries.left += padding;
boundaries.right -= padding;
boundaries.top = boundaries.top + padding;
boundaries.bottom = boundaries.bottom - padding;
return boundaries;
};
/**
* Loop trough the list of modifiers and run them in order, each of them will then edit the data object
* @method
* @memberof Popper
* @access public
* @param {Object} data
* @param {Array} modifiers
* @param {Function} ends
*/
Popper.prototype.runModifiers = function (data, modifiers, ends) {
var modifiersToRun = modifiers.slice();
if (ends !== undefined) {
modifiersToRun = this._options.modifiers.slice(0, getArrayKeyIndex(this._options.modifiers, ends));
}
modifiersToRun.forEach(function (modifier) {
if (isFunction(modifier)) {
data = modifier.call(this, data);
}
}.bind(this));
return data;
};
/**
* Helper used to know if the given modifier depends from another one.
* @method
* @memberof Popper
* @param {String} requesting - name of requesting modifier
* @param {String} requested - name of requested modifier
* @returns {Boolean}
*/
Popper.prototype.isModifierRequired = function (requesting, requested) {
var index = getArrayKeyIndex(this._options.modifiers, requesting);
return !!this._options.modifiers.slice(0, index).filter(function (modifier) {
return modifier === requested;
}).length;
};
//
// Modifiers
//
/**
* Modifiers list
* @namespace Popper.modifiers
* @memberof Popper
* @type {Object}
*/
Popper.prototype.modifiers = {};
/**
* Apply the computed styles to the popper element
* @method
* @memberof Popper.modifiers
* @argument {Object} data - The data object generated by `update` method
* @returns {Object} The same data object
*/
Popper.prototype.modifiers.applyStyle = function (data) {
// apply the final offsets to the popper
// NOTE: 1 DOM access here
var styles = {
position: data.offsets.popper.position
};
// round top and left to avoid blurry text
var left = Math.round(data.offsets.popper.left);
var top = Math.round(data.offsets.popper.top);
// if gpuAcceleration is set to true and transform is supported, we use `translate3d` to apply the position to the popper
// we automatically use the supported prefixed version if needed
var prefixedProperty;
if (this._options.gpuAcceleration && (prefixedProperty = getSupportedPropertyName('transform'))) {
styles[prefixedProperty] = 'translate3d(' + left + 'px, ' + top + 'px, 0)';
styles.top = 0;
styles.left = 0;
}
// othwerise, we use the standard `left` and `top` properties
else {
styles.left = left;
styles.top = top;
}
// any property present in `data.styles` will be applied to the popper,
// in this way we can make the 3rd party modifiers add custom styles to it
// Be aware, modifiers could override the properties defined in the previous
// lines of this modifier!
Object.assign(styles, data.styles);
setStyle(this._popper, styles);
// set an attribute which will be useful to style the tooltip (use it to properly position its arrow)
// NOTE: 1 DOM access here
this._popper.setAttribute('x-placement', data.placement);
// if the arrow modifier is required and the arrow style has been computed, apply the arrow style
if (this.isModifierRequired(this.modifiers.applyStyle, this.modifiers.arrow) && data.offsets.arrow) {
setStyle(data.arrowElement, data.offsets.arrow);
}
return data;
};
/**
* Modifier used to shift the popper on the start or end of its reference element side
* @method
* @memberof Popper.modifiers
* @argument {Object} data - The data object generated by `update` method
* @returns {Object} The data object, properly modified
*/
Popper.prototype.modifiers.shift = function (data) {
var placement = data.placement;
var basePlacement = placement.split('-')[0];
var shiftVariation = placement.split('-')[1];
// if shift shiftVariation is specified, run the modifier
if (shiftVariation) {
var reference = data.offsets.reference;
var popper = getPopperClientRect(data.offsets.popper);
var shiftOffsets = {
y: {
start: { top: reference.top },
end: { top: reference.top + reference.height - popper.height }
},
x: {
start: { left: reference.left },
end: { left: reference.left + reference.width - popper.width }
}
};
var axis = ['bottom', 'top'].indexOf(basePlacement) !== -1 ? 'x' : 'y';
data.offsets.popper = Object.assign(popper, shiftOffsets[axis][shiftVariation]);
}
return data;
};
/**
* Modifier used to make sure the popper does not overflows from it's boundaries
* @method
* @memberof Popper.modifiers
* @argument {Object} data - The data object generated by `update` method
* @returns {Object} The data object, properly modified
*/
Popper.prototype.modifiers.preventOverflow = function (data) {
var order = this._options.preventOverflowOrder;
var popper = getPopperClientRect(data.offsets.popper);
var check = {
left: function left() {
var left = popper.left;
if (popper.left < data.boundaries.left) {
left = Math.max(popper.left, data.boundaries.left);
}
return { left: left };
},
right: function right() {
var left = popper.left;
if (popper.right > data.boundaries.right) {
left = Math.min(popper.left, data.boundaries.right - popper.width);
}
return { left: left };
},
top: function top() {
var top = popper.top;
if (popper.top < data.boundaries.top) {
top = Math.max(popper.top, data.boundaries.top);
}
return { top: top };
},
bottom: function bottom() {
var top = popper.top;
if (popper.bottom > data.boundaries.bottom) {
top = Math.min(popper.top, data.boundaries.bottom - popper.height);
}
return { top: top };
}
};
order.forEach(function (direction) {
data.offsets.popper = Object.assign(popper, check[direction]());
});
return data;
};
/**
* Modifier used to make sure the popper is always near its reference
* @method
* @memberof Popper.modifiers
* @argument {Object} data - The data object generated by _update method
* @returns {Object} The data object, properly modified
*/
Popper.prototype.modifiers.keepTogether = function (data) {
var popper = getPopperClientRect(data.offsets.popper);
var reference = data.offsets.reference;
var f = Math.floor;
if (popper.right < f(reference.left)) {
data.offsets.popper.left = f(reference.left) - popper.width;
}
if (popper.left > f(reference.right)) {
data.offsets.popper.left = f(reference.right);
}
if (popper.bottom < f(reference.top)) {
data.offsets.popper.top = f(reference.top) - popper.height;
}
if (popper.top > f(reference.bottom)) {
data.offsets.popper.top = f(reference.bottom);
}
return data;
};
/**
* Modifier used to flip the placement of the popper when the latter is starting overlapping its reference element.
* Requires the `preventOverflow` modifier before it in order to work.
* **NOTE:** This modifier will run all its previous modifiers everytime it tries to flip the popper!
* @method
* @memberof Popper.modifiers
* @argument {Object} data - The data object generated by _update method
* @returns {Object} The data object, properly modified
*/
Popper.prototype.modifiers.flip = function (data) {
// check if preventOverflow is in the list of modifiers before the flip modifier.
// otherwise flip would not work as expected.
if (!this.isModifierRequired(this.modifiers.flip, this.modifiers.preventOverflow)) {
console.warn('WARNING: preventOverflow modifier is required by flip modifier in order to work, be sure to include it before flip!');
return data;
}
if (data.flipped && data.placement === data._originalPlacement) {
// seems like flip is trying to loop, probably there's not enough space on any of the flippable sides
return data;
}
var placement = data.placement.split('-')[0];
var placementOpposite = getOppositePlacement(placement);
var variation = data.placement.split('-')[1] || '';
var flipOrder = [];
if (this._options.flipBehavior === 'flip') {
flipOrder = [placement, placementOpposite];
} else {
flipOrder = this._options.flipBehavior;
}
flipOrder.forEach(function (step, index) {
if (placement !== step || flipOrder.length === index + 1) {
return;
}
placement = data.placement.split('-')[0];
placementOpposite = getOppositePlacement(placement);
var popperOffsets = getPopperClientRect(data.offsets.popper);
// this boolean is used to distinguish right and bottom from top and left
// they need different computations to get flipped
var a = ['right', 'bottom'].indexOf(placement) !== -1;
// using Math.floor because the reference offsets may contain decimals we are not going to consider here
if (a && Math.floor(data.offsets.reference[placement]) > Math.floor(popperOffsets[placementOpposite]) || !a && Math.floor(data.offsets.reference[placement]) < Math.floor(popperOffsets[placementOpposite])) {
// we'll use this boolean to detect any flip loop
data.flipped = true;
data.placement = flipOrder[index + 1];
if (variation) {
data.placement += '-' + variation;
}
data.offsets.popper = this._getOffsets(this._popper, this._reference, data.placement).popper;
data = this.runModifiers(data, this._options.modifiers, this._flip);
}
}.bind(this));
return data;
};
/**
* Modifier used to add an offset to the popper, useful if you more granularity positioning your popper.
* The offsets will shift the popper on the side of its reference element.
* @method
* @memberof Popper.modifiers
* @argument {Object} data - The data object generated by _update method
* @returns {Object} The data object, properly modified
*/
Popper.prototype.modifiers.offset = function (data) {
var offset = this._options.offset;
var popper = data.offsets.popper;
if (data.placement.indexOf('left') !== -1) {
popper.top -= offset;
} else if (data.placement.indexOf('right') !== -1) {
popper.top += offset;
} else if (data.placement.indexOf('top') !== -1) {
popper.left -= offset;
} else if (data.placement.indexOf('bottom') !== -1) {
popper.left += offset;
}
return data;
};
/**
* Modifier used to move the arrows on the edge of the popper to make sure them are always between the popper and the reference element
* It will use the CSS outer size of the arrow element to know how many pixels of conjuction are needed
* @method
* @memberof Popper.modifiers
* @argument {Object} data - The data object generated by _update method
* @returns {Object} The data object, properly modified
*/
Popper.prototype.modifiers.arrow = function (data) {
var arrow = this._options.arrowElement;
var arrowOffset = this._options.arrowOffset;
// if the arrowElement is a string, suppose it's a CSS selector
if (typeof arrow === 'string') {
arrow = this._popper.querySelector(arrow);
}
// if arrow element is not found, don't run the modifier
if (!arrow) {
return data;
}
// the arrow element must be child of its popper
if (!this._popper.contains(arrow)) {
console.warn('WARNING: `arrowElement` must be child of its popper element!');
return data;
}
// arrow depends on keepTogether in order to work
if (!this.isModifierRequired(this.modifiers.arrow, this.modifiers.keepTogether)) {
console.warn('WARNING: keepTogether modifier is required by arrow modifier in order to work, be sure to include it before arrow!');
return data;
}
var arrowStyle = {};
var placement = data.placement.split('-')[0];
var popper = getPopperClientRect(data.offsets.popper);
var reference = data.offsets.reference;
var isVertical = ['left', 'right'].indexOf(placement) !== -1;
var len = isVertical ? 'height' : 'width';
var side = isVertical ? 'top' : 'left';
var translate = isVertical ? 'translateY' : 'translateX';
var altSide = isVertical ? 'left' : 'top';
var opSide = isVertical ? 'bottom' : 'right';
var arrowSize = getOuterSizes(arrow)[len];
//
// extends keepTogether behavior making sure the popper and its reference have enough pixels in conjuction
//
// top/left side
if (reference[opSide] - arrowSize < popper[side]) {
data.offsets.popper[side] -= popper[side] - (reference[opSide] - arrowSize);
}
// bottom/right side
if (reference[side] + arrowSize > popper[opSide]) {
data.offsets.popper[side] += reference[side] + arrowSize - popper[opSide];
}
// compute center of the popper
var center = reference[side] + (arrowOffset || reference[len] / 2 - arrowSize / 2);
var sideValue = center - popper[side];
// prevent arrow from being placed not contiguously to its popper
sideValue = Math.max(Math.min(popper[len] - arrowSize - 8, sideValue), 8);
arrowStyle[side] = sideValue;
arrowStyle[altSide] = ''; // make sure to remove any old style from the arrow
data.offsets.arrow = arrowStyle;
data.arrowElement = arrow;
return data;
};
//
// Helpers
//
/**
* Get the outer sizes of the given element (offset size + margins)
* @function
* @ignore
* @argument {Element} element
* @returns {Object} object containing width and height properties
*/
function getOuterSizes(element) {
// NOTE: 1 DOM access here
var _display = element.style.display,
_visibility = element.style.visibility;
element.style.display = 'block';element.style.visibility = 'hidden';
var calcWidthToForceRepaint = element.offsetWidth;
// original method
var styles = root.getComputedStyle(element);
var x = parseFloat(styles.marginTop) + parseFloat(styles.marginBottom);
var y = parseFloat(styles.marginLeft) + parseFloat(styles.marginRight);
var result = { width: element.offsetWidth + y, height: element.offsetHeight + x };
// reset element styles
element.style.display = _display;element.style.visibility = _visibility;
return result;
}
/**
* Get the opposite placement of the given one/
* @function
* @ignore
* @argument {String} placement
* @returns {String} flipped placement
*/
function getOppositePlacement(placement) {
var hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };
return placement.replace(/left|right|bottom|top/g, function (matched) {
return hash[matched];
});
}
/**
* Given the popper offsets, generate an output similar to getBoundingClientRect
* @function
* @ignore
* @argument {Object} popperOffsets
* @returns {Object} ClientRect like output
*/
function getPopperClientRect(popperOffsets) {
var offsets = Object.assign({}, popperOffsets);
offsets.right = offsets.left + offsets.width;
offsets.bottom = offsets.top + offsets.height;
return offsets;
}
/**
* Given an array and the key to find, returns its index
* @function
* @ignore
* @argument {Array} arr
* @argument keyToFind
* @returns index or null
*/
function getArrayKeyIndex(arr, keyToFind) {
var i = 0,
key;
for (key in arr) {
if (arr[key] === keyToFind) {
return i;
}
i++;
}
return null;
}
/**
* Get CSS computed property of the given element
* @function
* @ignore
* @argument {Eement} element
* @argument {String} property
*/
function getStyleComputedProperty(element, property) {
// NOTE: 1 DOM access here
var css = root.getComputedStyle(element, null);
return css[property];
}
/**
* Returns the offset parent of the given element
* @function
* @ignore
* @argument {Element} element
* @returns {Element} offset parent
*/
function getOffsetParent(element) {
// NOTE: 1 DOM access here
var offsetParent = element.offsetParent;
return offsetParent === root.document.body || !offsetParent ? root.document.documentElement : offsetParent;
}
/**
* Returns the scrolling parent of the given element
* @function
* @ignore
* @argument {Element} element
* @returns {Element} offset parent
*/
function getScrollParent(element) {
var parent = element.parentNode;
if (!parent) {
return element;
}
if (parent === root.document) {
// Firefox puts the scrollTOp value on `documentElement` instead of `body`, we then check which of them is
// greater than 0 and return the proper element
if (root.document.body.scrollTop || root.document.body.scrollLeft) {
return root.document.body;
} else {
return root.document.documentElement;
}
}
// Firefox want us to check `-x` and `-y` variations as well
if (['scroll', 'auto'].indexOf(getStyleComputedProperty(parent, 'overflow')) !== -1 || ['scroll', 'auto'].indexOf(getStyleComputedProperty(parent, 'overflow-x')) !== -1 || ['scroll', 'auto'].indexOf(getStyleComputedProperty(parent, 'overflow-y')) !== -1) {
// If the detected scrollParent is body, we perform an additional check on its parentNode
// in this way we'll get body if the browser is Chrome-ish, or documentElement otherwise
// fixes issue #65
return parent;
}
return getScrollParent(element.parentNode);
}
/**
* Check if the given element is fixed or is inside a fixed parent
* @function
* @ignore
* @argument {Element} element
* @argument {Element} customContainer
* @returns {Boolean} answer to "isFixed?"
*/
function isFixed(element) {
if (element === root.document.body) {
return false;
}
if (getStyleComputedProperty(element, 'position') === 'fixed') {
return true;
}
return element.parentNode ? isFixed(element.parentNode) : element;
}
/**
* Set the style to the given popper
* @function
* @ignore
* @argument {Element} element - Element to apply the style to
* @argument {Object} styles - Object with a list of properties and values which will be applied to the element
*/
function setStyle(element, styles) {
function is_numeric(n) {
return n !== '' && !isNaN(parseFloat(n)) && isFinite(n);
}
Object.keys(styles).forEach(function (prop) {
var unit = '';
// add unit if the value is numeric and is one of the following
if (['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(prop) !== -1 && is_numeric(styles[prop])) {
unit = 'px';
}
element.style[prop] = styles[prop] + unit;
});
}
/**
* Check if the given variable is a function
* @function
* @ignore
* @argument {*} functionToCheck - variable to check
* @returns {Boolean} answer to: is a function?
*/
function isFunction(functionToCheck) {
var getType = {};
return functionToCheck && getType.toString.call(functionToCheck) === '[object Function]';
}
/**
* Get the position of the given element, relative to its offset parent
* @function
* @ignore
* @param {Element} element
* @return {Object} position - Coordinates of the element and its `scrollTop`
*/
function getOffsetRect(element) {
var elementRect = {
width: element.offsetWidth,
height: element.offsetHeight,
left: element.offsetLeft,
top: element.offsetTop
};
elementRect.right = elementRect.left + elementRect.width;
elementRect.bottom = elementRect.top + elementRect.height;
// position
return elementRect;
}
/**
* Get bounding client rect of given element
* @function
* @ignore
* @param {HTMLElement} element
* @return {Object} client rect
*/
function getBoundingClientRect(element) {
var rect = element.getBoundingClientRect();
// whether the IE version is lower than 11
var isIE = navigator.userAgent.indexOf("MSIE") != -1;
// fix ie document bounding top always 0 bug
var rectTop = isIE && element.tagName === 'HTML' ? -element.scrollTop : rect.top;
return {
left: rect.left,
top: rectTop,
right: rect.right,
bottom: rect.bottom,
width: rect.right - rect.left,
height: rect.bottom - rectTop
};
}
/**
* Given an element and one of its parents, return the offset
* @function
* @ignore
* @param {HTMLElement} element
* @param {HTMLElement} parent
* @return {Object} rect
*/
function getOffsetRectRelativeToCustomParent(element, parent, fixed) {
var elementRect = getBoundingClientRect(element);
var parentRect = getBoundingClientRect(parent);
if (fixed) {
var scrollParent = getScrollParent(parent);
parentRect.top += scrollParent.scrollTop;
parentRect.bottom += scrollParent.scrollTop;
parentRect.left += scrollParent.scrollLeft;
parentRect.right += scrollParent.scrollLeft;
}
var rect = {
top: elementRect.top - parentRect.top,
left: elementRect.left - parentRect.left,
bottom: elementRect.top - parentRect.top + elementRect.height,
right: elementRect.left - parentRect.left + elementRect.width,
width: elementRect.width,
height: elementRect.height
};
return rect;
}
/**
* Get the prefixed supported property name
* @function
* @ignore
* @argument {String} property (camelCase)
* @returns {String} prefixed property (camelCase)
*/
function getSupportedPropertyName(property) {
var prefixes = ['', 'ms', 'webkit', 'moz', 'o'];
for (var i = 0; i < prefixes.length; i++) {
var toCheck = prefixes[i] ? prefixes[i] + property.charAt(0).toUpperCase() + property.slice(1) : property;
if (typeof root.document.body.style[toCheck] !== 'undefined') {
return toCheck;
}
}
return null;
}
/**
* The Object.assign() method is used to copy the values of all enumerable own properties from one or more source
* objects to a target object. It will return the target object.
* This polyfill doesn't support symbol properties, since ES5 doesn't have symbols anyway
* Source: https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
* @function
* @ignore
*/
if (!Object.assign) {
Object.defineProperty(Object, 'assign', {
enumerable: false,
configurable: true,
writable: true,
value: function value(target) {
if (target === undefined || target === null) {
throw new TypeError('Cannot convert first argument to object');
}
var to = Object(target);
for (var i = 1; i < arguments.length; i++) {
var nextSource = arguments[i];
if (nextSource === undefined || nextSource === null) {
continue;
}
nextSource = Object(nextSource);
var keysArray = Object.keys(nextSource);
for (var nextIndex = 0, len = keysArray.length; nextIndex < len; nextIndex++) {
var nextKey = keysArray[nextIndex];
var desc = Object.getOwnPropertyDescriptor(nextSource, nextKey);
if (desc !== undefined && desc.enumerable) {
to[nextKey] = nextSource[nextKey];
}
}
}
return to;
}
});
}
return Popper;
});