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Diffstat (limited to 'library/popper')
| -rw-r--r-- | library/popper/popper.js | 2269 |
1 files changed, 2269 insertions, 0 deletions
diff --git a/library/popper/popper.js b/library/popper/popper.js new file mode 100644 index 000000000..ce29a6aec --- /dev/null +++ b/library/popper/popper.js @@ -0,0 +1,2269 @@ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : + typeof define === 'function' && define.amd ? define(factory) : + (global.Popper = factory()); +}(this, (function () { 'use strict'; + +var nativeHints = ['native code', '[object MutationObserverConstructor]']; + +/** + * Determine if a function is implemented natively (as opposed to a polyfill). + * @method + * @memberof Popper.Utils + * @argument {Function | undefined} fn the function to check + * @returns {Boolean} + */ +var isNative = (function (fn) { + return nativeHints.some(function (hint) { + return (fn || '').toString().indexOf(hint) > -1; + }); +}); + +var isBrowser = typeof window !== 'undefined'; +var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox']; +var timeoutDuration = 0; +for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) { + if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) { + timeoutDuration = 1; + break; + } +} + +function microtaskDebounce(fn) { + var scheduled = false; + var i = 0; + var elem = document.createElement('span'); + + // MutationObserver provides a mechanism for scheduling microtasks, which + // are scheduled *before* the next task. This gives us a way to debounce + // a function but ensure it's called *before* the next paint. + var observer = new MutationObserver(function () { + fn(); + scheduled = false; + }); + + observer.observe(elem, { attributes: true }); + + return function () { + if (!scheduled) { + scheduled = true; + elem.setAttribute('x-index', i); + i = i + 1; // don't use compund (+=) because it doesn't get optimized in V8 + } + }; +} + +function taskDebounce(fn) { + var scheduled = false; + return function () { + if (!scheduled) { + scheduled = true; + setTimeout(function () { + scheduled = false; + fn(); + }, timeoutDuration); + } + }; +} + +// It's common for MutationObserver polyfills to be seen in the wild, however +// these rely on Mutation Events which only occur when an element is connected +// to the DOM. The algorithm used in this module does not use a connected element, +// and so we must ensure that a *native* MutationObserver is available. +var supportsNativeMutationObserver = isBrowser && isNative(window.MutationObserver); + +/** +* Create a debounced version of a method, that's asynchronously deferred +* but called in the minimum time possible. +* +* @method +* @memberof Popper.Utils +* @argument {Function} fn +* @returns {Function} +*/ +var debounce = supportsNativeMutationObserver ? microtaskDebounce : taskDebounce; + +/** + * Tells if a given input is a number + * @method + * @memberof Popper.Utils + * @param {*} input to check + * @return {Boolean} + */ +function isNumeric(n) { + return n !== '' && !isNaN(parseFloat(n)) && isFinite(n); +} + +/** + * Set the style to the given popper + * @method + * @memberof Popper.Utils + * @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 setStyles(element, styles) { + 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 && isNumeric(styles[prop])) { + unit = 'px'; + } + element.style[prop] = styles[prop] + unit; + }); +} + +/** + * Check if the given variable is a function + * @method + * @memberof Popper.Utils + * @argument {Any} 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 CSS computed property of the given element + * @method + * @memberof Popper.Utils + * @argument {Eement} element + * @argument {String} property + */ +function getStyleComputedProperty(element, property) { + if (element.nodeType !== 1) { + return []; + } + // NOTE: 1 DOM access here + var css = window.getComputedStyle(element, null); + return property ? css[property] : css; +} + +/** + * Returns the parentNode or the host of the element + * @method + * @memberof Popper.Utils + * @argument {Element} element + * @returns {Element} parent + */ +function getParentNode(element) { + if (element.nodeName === 'HTML') { + return element; + } + return element.parentNode || element.host; +} + +/** + * Returns the scrolling parent of the given element + * @method + * @memberof Popper.Utils + * @argument {Element} element + * @returns {Element} scroll parent + */ +function getScrollParent(element) { + // Return body, `getScroll` will take care to get the correct `scrollTop` from it + if (!element || ['HTML', 'BODY', '#document'].indexOf(element.nodeName) !== -1) { + return window.document.body; + } + + // Firefox want us to check `-x` and `-y` variations as well + + var _getStyleComputedProp = getStyleComputedProperty(element), + overflow = _getStyleComputedProp.overflow, + overflowX = _getStyleComputedProp.overflowX, + overflowY = _getStyleComputedProp.overflowY; + + if (/(auto|scroll)/.test(overflow + overflowY + overflowX)) { + return element; + } + + return getScrollParent(getParentNode(element)); +} + +function isOffsetContainer(element) { + var nodeName = element.nodeName; + + if (nodeName === 'BODY') { + return false; + } + return nodeName === 'HTML' || element.firstElementChild.offsetParent === element; +} + +/** + * Finds the root node (document, shadowDOM root) of the given element + * @method + * @memberof Popper.Utils + * @argument {Element} node + * @returns {Element} root node + */ +function getRoot(node) { + if (node.parentNode !== null) { + return getRoot(node.parentNode); + } + + return node; +} + +/** + * Returns the offset parent of the given element + * @method + * @memberof Popper.Utils + * @argument {Element} element + * @returns {Element} offset parent + */ +function getOffsetParent(element) { + // NOTE: 1 DOM access here + var offsetParent = element && element.offsetParent; + var nodeName = offsetParent && offsetParent.nodeName; + + if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') { + return window.document.documentElement; + } + + return offsetParent; +} + +/** + * Finds the offset parent common to the two provided nodes + * @method + * @memberof Popper.Utils + * @argument {Element} element1 + * @argument {Element} element2 + * @returns {Element} common offset parent + */ +function findCommonOffsetParent(element1, element2) { + // This check is needed to avoid errors in case one of the elements isn't defined for any reason + if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) { + return window.document.documentElement; + } + + // Here we make sure to give as "start" the element that comes first in the DOM + var order = element1.compareDocumentPosition(element2) & Node.DOCUMENT_POSITION_FOLLOWING; + var start = order ? element1 : element2; + var end = order ? element2 : element1; + + // Get common ancestor container + var range = document.createRange(); + range.setStart(start, 0); + range.setEnd(end, 0); + var commonAncestorContainer = range.commonAncestorContainer; + + // Both nodes are inside #document + + if (element1 !== commonAncestorContainer && element2 !== commonAncestorContainer || start.contains(end)) { + if (isOffsetContainer(commonAncestorContainer)) { + return commonAncestorContainer; + } + + return getOffsetParent(commonAncestorContainer); + } + + // one of the nodes is inside shadowDOM, find which one + var element1root = getRoot(element1); + if (element1root.host) { + return findCommonOffsetParent(element1root.host, element2); + } else { + return findCommonOffsetParent(element1, getRoot(element2).host); + } +} + +/** + * Gets the scroll value of the given element in the given side (top and left) + * @method + * @memberof Popper.Utils + * @argument {Element} element + * @argument {String} side `top` or `left` + * @returns {number} amount of scrolled pixels + */ +function getScroll(element) { + var side = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'top'; + + var upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft'; + var nodeName = element.nodeName; + + if (nodeName === 'BODY' || nodeName === 'HTML') { + var html = window.document.documentElement; + var scrollingElement = window.document.scrollingElement || html; + return scrollingElement[upperSide]; + } + + return element[upperSide]; +} + +/* + * Sum or subtract the element scroll values (left and top) from a given rect object + * @method + * @memberof Popper.Utils + * @param {Object} rect - Rect object you want to change + * @param {HTMLElement} element - The element from the function reads the scroll values + * @param {Boolean} subtract - set to true if you want to subtract the scroll values + * @return {Object} rect - The modifier rect object + */ +function includeScroll(rect, element) { + var subtract = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false; + + var scrollTop = getScroll(element, 'top'); + var scrollLeft = getScroll(element, 'left'); + var modifier = subtract ? -1 : 1; + rect.top += scrollTop * modifier; + rect.bottom += scrollTop * modifier; + rect.left += scrollLeft * modifier; + rect.right += scrollLeft * modifier; + return rect; +} + +/* + * Helper to detect borders of a given element + * @method + * @memberof Popper.Utils + * @param {CSSStyleDeclaration} styles + * Result of `getStyleComputedProperty` on the given element + * @param {String} axis - `x` or `y` + * @return {number} borders - The borders size of the given axis + */ + +function getBordersSize(styles, axis) { + var sideA = axis === 'x' ? 'Left' : 'Top'; + var sideB = sideA === 'Left' ? 'Right' : 'Bottom'; + + return +styles['border' + sideA + 'Width'].split('px')[0] + +styles['border' + sideB + 'Width'].split('px')[0]; +} + +/** + * Tells if you are running Internet Explorer 10 + * @method + * @memberof Popper.Utils + * @returns {Boolean} isIE10 + */ +var isIE10 = undefined; + +var isIE10$1 = function () { + if (isIE10 === undefined) { + isIE10 = navigator.appVersion.indexOf('MSIE 10') !== -1; + } + return isIE10; +}; + +function getSize(axis, body, html, computedStyle) { + return Math.max(body['offset' + axis], html['client' + axis], html['offset' + axis], isIE10$1() ? html['offset' + axis] + computedStyle['margin' + (axis === 'Height' ? 'Top' : 'Left')] + computedStyle['margin' + (axis === 'Height' ? 'Bottom' : 'Right')] : 0); +} + +function getWindowSizes() { + var body = window.document.body; + var html = window.document.documentElement; + var computedStyle = isIE10$1() && window.getComputedStyle(html); + + return { + height: getSize('Height', body, html, computedStyle), + width: getSize('Width', body, html, computedStyle) + }; +} + +var classCallCheck = function (instance, Constructor) { + if (!(instance instanceof Constructor)) { + throw new TypeError("Cannot call a class as a function"); + } +}; + +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; + }; +}(); + + + + + +var defineProperty = function (obj, key, value) { + if (key in obj) { + Object.defineProperty(obj, key, { + value: value, + enumerable: true, + configurable: true, + writable: true + }); + } else { + obj[key] = value; + } + + return obj; +}; + +var _extends = Object.assign || function (target) { + for (var i = 1; i < arguments.length; i++) { + var source = arguments[i]; + + for (var key in source) { + if (Object.prototype.hasOwnProperty.call(source, key)) { + target[key] = source[key]; + } + } + } + + return target; +}; + +/** + * Given element offsets, generate an output similar to getBoundingClientRect + * @method + * @memberof Popper.Utils + * @argument {Object} offsets + * @returns {Object} ClientRect like output + */ +function getClientRect(offsets) { + return _extends({}, offsets, { + right: offsets.left + offsets.width, + bottom: offsets.top + offsets.height + }); +} + +/** + * Get bounding client rect of given element + * @method + * @memberof Popper.Utils + * @param {HTMLElement} element + * @return {Object} client rect + */ +function getBoundingClientRect(element) { + var rect = {}; + + // IE10 10 FIX: Please, don't ask, the element isn't + // considered in DOM in some circumstances... + // This isn't reproducible in IE10 compatibility mode of IE11 + if (isIE10$1()) { + try { + rect = element.getBoundingClientRect(); + var scrollTop = getScroll(element, 'top'); + var scrollLeft = getScroll(element, 'left'); + rect.top += scrollTop; + rect.left += scrollLeft; + rect.bottom += scrollTop; + rect.right += scrollLeft; + } catch (err) {} + } else { + rect = element.getBoundingClientRect(); + } + + var result = { + left: rect.left, + top: rect.top, + width: rect.right - rect.left, + height: rect.bottom - rect.top + }; + + // subtract scrollbar size from sizes + var sizes = element.nodeName === 'HTML' ? getWindowSizes() : {}; + var width = sizes.width || element.clientWidth || result.right - result.left; + var height = sizes.height || element.clientHeight || result.bottom - result.top; + + var horizScrollbar = element.offsetWidth - width; + var vertScrollbar = element.offsetHeight - height; + + // if an hypothetical scrollbar is detected, we must be sure it's not a `border` + // we make this check conditional for performance reasons + if (horizScrollbar || vertScrollbar) { + var styles = getStyleComputedProperty(element); + horizScrollbar -= getBordersSize(styles, 'x'); + vertScrollbar -= getBordersSize(styles, 'y'); + + result.width -= horizScrollbar; + result.height -= vertScrollbar; + } + + return getClientRect(result); +} + +function getOffsetRectRelativeToArbitraryNode(children, parent) { + var isIE10 = isIE10$1(); + var isHTML = parent.nodeName === 'HTML'; + var childrenRect = getBoundingClientRect(children); + var parentRect = getBoundingClientRect(parent); + var scrollParent = getScrollParent(children); + var offsets = getClientRect({ + top: childrenRect.top - parentRect.top, + left: childrenRect.left - parentRect.left, + width: childrenRect.width, + height: childrenRect.height + }); + + // Subtract margins of documentElement in case it's being used as parent + // we do this only on HTML because it's the only element that behaves + // differently when margins are applied to it. The margins are included in + // the box of the documentElement, in the other cases not. + if (isHTML || parent.nodeName === 'BODY') { + var styles = getStyleComputedProperty(parent); + var borderTopWidth = isIE10 && isHTML ? 0 : +styles.borderTopWidth.split('px')[0]; + var borderLeftWidth = isIE10 && isHTML ? 0 : +styles.borderLeftWidth.split('px')[0]; + var marginTop = isIE10 && isHTML ? 0 : +styles.marginTop.split('px')[0]; + var marginLeft = isIE10 && isHTML ? 0 : +styles.marginLeft.split('px')[0]; + + offsets.top -= borderTopWidth - marginTop; + offsets.bottom -= borderTopWidth - marginTop; + offsets.left -= borderLeftWidth - marginLeft; + offsets.right -= borderLeftWidth - marginLeft; + + // Attach marginTop and marginLeft because in some circumstances we may need them + offsets.marginTop = marginTop; + offsets.marginLeft = marginLeft; + } + + if (isIE10 ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') { + offsets = includeScroll(offsets, parent); + } + + return offsets; +} + +function getViewportOffsetRectRelativeToArtbitraryNode(element) { + var html = window.document.documentElement; + var relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html); + var width = Math.max(html.clientWidth, window.innerWidth || 0); + var height = Math.max(html.clientHeight, window.innerHeight || 0); + + var scrollTop = getScroll(html); + var scrollLeft = getScroll(html, 'left'); + + var offset = { + top: scrollTop - relativeOffset.top + relativeOffset.marginTop, + left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft, + width: width, + height: height + }; + + return getClientRect(offset); +} + +/** + * Check if the given element is fixed or is inside a fixed parent + * @method + * @memberof Popper.Utils + * @argument {Element} element + * @argument {Element} customContainer + * @returns {Boolean} answer to "isFixed?" + */ +function isFixed(element) { + var nodeName = element.nodeName; + if (nodeName === 'BODY' || nodeName === 'HTML') { + return false; + } + if (getStyleComputedProperty(element, 'position') === 'fixed') { + return true; + } + return isFixed(getParentNode(element)); +} + +/** + * Computed the boundaries limits and return them + * @method + * @memberof Popper.Utils + * @param {HTMLElement} popper + * @param {HTMLElement} reference + * @param {number} padding + * @param {HTMLElement} boundariesElement - Element used to define the boundaries + * @returns {Object} Coordinates of the boundaries + */ +function getBoundaries(popper, reference, padding, boundariesElement) { + // NOTE: 1 DOM access here + var boundaries = { top: 0, left: 0 }; + var offsetParent = findCommonOffsetParent(popper, reference); + + // Handle viewport case + if (boundariesElement === 'viewport') { + boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent); + } else { + // Handle other cases based on DOM element used as boundaries + var boundariesNode = void 0; + if (boundariesElement === 'scrollParent') { + boundariesNode = getScrollParent(getParentNode(popper)); + if (boundariesNode.nodeName === 'BODY') { + boundariesNode = window.document.documentElement; + } + } else if (boundariesElement === 'window') { + boundariesNode = window.document.documentElement; + } else { + boundariesNode = boundariesElement; + } + + var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent); + + // In case of HTML, we need a different computation + if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) { + var _getWindowSizes = getWindowSizes(), + height = _getWindowSizes.height, + width = _getWindowSizes.width; + + boundaries.top += offsets.top - offsets.marginTop; + boundaries.bottom = height + offsets.top; + boundaries.left += offsets.left - offsets.marginLeft; + boundaries.right = width + offsets.left; + } else { + // for all the other DOM elements, this one is good + boundaries = offsets; + } + } + + // Add paddings + boundaries.left += padding; + boundaries.top += padding; + boundaries.right -= padding; + boundaries.bottom -= padding; + + return boundaries; +} + +function getArea(_ref) { + var width = _ref.width, + height = _ref.height; + + return width * height; +} + +/** + * Utility used to transform the `auto` placement to the placement with more + * available space. + * @method + * @memberof Popper.Utils + * @argument {Object} data - The data object generated by update method + * @argument {Object} options - Modifiers configuration and options + * @returns {Object} The data object, properly modified + */ +function computeAutoPlacement(placement, refRect, popper, reference, boundariesElement) { + var padding = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : 0; + + if (placement.indexOf('auto') === -1) { + return placement; + } + + var boundaries = getBoundaries(popper, reference, padding, boundariesElement); + + var rects = { + top: { + width: boundaries.width, + height: refRect.top - boundaries.top + }, + right: { + width: boundaries.right - refRect.right, + height: boundaries.height + }, + bottom: { + width: boundaries.width, + height: boundaries.bottom - refRect.bottom + }, + left: { + width: refRect.left - boundaries.left, + height: boundaries.height + } + }; + + var sortedAreas = Object.keys(rects).map(function (key) { + return _extends({ + key: key + }, rects[key], { + area: getArea(rects[key]) + }); + }).sort(function (a, b) { + return b.area - a.area; + }); + + var filteredAreas = sortedAreas.filter(function (_ref2) { + var width = _ref2.width, + height = _ref2.height; + return width >= popper.clientWidth && height >= popper.clientHeight; + }); + + var computedPlacement = filteredAreas.length > 0 ? filteredAreas[0].key : sortedAreas[0].key; + + var variation = placement.split('-')[1]; + + return computedPlacement + (variation ? '-' + variation : ''); +} + +/** + * Get offsets to the reference element + * @method + * @memberof Popper.Utils + * @param {Object} state + * @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 + */ +function getReferenceOffsets(state, popper, reference) { + var commonOffsetParent = findCommonOffsetParent(popper, reference); + return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent); +} + +/** + * Get the outer sizes of the given element (offset size + margins) + * @method + * @memberof Popper.Utils + * @argument {Element} element + * @returns {Object} object containing width and height properties + */ +function getOuterSizes(element) { + var styles = window.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 + }; + return result; +} + +/** + * Get the opposite placement of the given one + * @method + * @memberof Popper.Utils + * @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]; + }); +} + +/** + * Get offsets to the popper + * @method + * @memberof Popper.Utils + * @param {Object} position - CSS position the Popper will get applied + * @param {HTMLElement} popper - the popper element + * @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this) + * @param {String} placement - one of the valid placement options + * @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper + */ +function getPopperOffsets(popper, referenceOffsets, placement) { + placement = placement.split('-')[0]; + + // Get popper node sizes + var popperRect = getOuterSizes(popper); + + // Add position, width and height to our offsets object + var popperOffsets = { + width: popperRect.width, + height: popperRect.height + }; + + // depending by the popper placement we have to compute its offsets slightly differently + var isHoriz = ['right', 'left'].indexOf(placement) !== -1; + var mainSide = isHoriz ? 'top' : 'left'; + var secondarySide = isHoriz ? 'left' : 'top'; + var measurement = isHoriz ? 'height' : 'width'; + var secondaryMeasurement = !isHoriz ? 'height' : 'width'; + + popperOffsets[mainSide] = referenceOffsets[mainSide] + referenceOffsets[measurement] / 2 - popperRect[measurement] / 2; + if (placement === secondarySide) { + popperOffsets[secondarySide] = referenceOffsets[secondarySide] - popperRect[secondaryMeasurement]; + } else { + popperOffsets[secondarySide] = referenceOffsets[getOppositePlacement(secondarySide)]; + } + + return popperOffsets; +} + +/** + * Mimics the `find` method of Array + * @method + * @memberof Popper.Utils + * @argument {Array} arr + * @argument prop + * @argument value + * @returns index or -1 + */ +function find(arr, check) { + // use native find if supported + if (Array.prototype.find) { + return arr.find(check); + } + + // use `filter` to obtain the same behavior of `find` + return arr.filter(check)[0]; +} + +/** + * Return the index of the matching object + * @method + * @memberof Popper.Utils + * @argument {Array} arr + * @argument prop + * @argument value + * @returns index or -1 + */ +function findIndex(arr, prop, value) { + // use native findIndex if supported + if (Array.prototype.findIndex) { + return arr.findIndex(function (cur) { + return cur[prop] === value; + }); + } + + // use `find` + `indexOf` if `findIndex` isn't supported + var match = find(arr, function (obj) { + return obj[prop] === value; + }); + return arr.indexOf(match); +} + +/** + * Loop trough the list of modifiers and run them in order, + * each of them will then edit the data object. + * @method + * @memberof Popper.Utils + * @param {dataObject} data + * @param {Array} modifiers + * @param {String} ends - Optional modifier name used as stopper + * @returns {dataObject} + */ +function runModifiers(modifiers, data, ends) { + var modifiersToRun = ends === undefined ? modifiers : modifiers.slice(0, findIndex(modifiers, 'name', ends)); + + modifiersToRun.forEach(function (modifier) { + if (modifier.function) { + console.warn('`modifier.function` is deprecated, use `modifier.fn`!'); + } + var fn = modifier.function || modifier.fn; + if (modifier.enabled && isFunction(fn)) { + data = fn(data, modifier); + } + }); + + return data; +} + +/** + * Updates the position of the popper, computing the new offsets and applying + * the new style.<br /> + * Prefer `scheduleUpdate` over `update` because of performance reasons. + * @method + * @memberof Popper + */ +function update() { + // if popper is destroyed, don't perform any further update + if (this.state.isDestroyed) { + return; + } + + var data = { + instance: this, + styles: {}, + attributes: {}, + flipped: false, + offsets: {} + }; + + // compute reference element offsets + data.offsets.reference = getReferenceOffsets(this.state, this.popper, this.reference); + + // compute auto placement, 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 = computeAutoPlacement(this.options.placement, data.offsets.reference, this.popper, this.reference, this.options.modifiers.flip.boundariesElement, this.options.modifiers.flip.padding); + + // store the computed placement inside `originalPlacement` + data.originalPlacement = data.placement; + + // compute the popper offsets + data.offsets.popper = getPopperOffsets(this.popper, data.offsets.reference, data.placement); + data.offsets.popper.position = 'absolute'; + + // run the modifiers + data = runModifiers(this.modifiers, data); + + // the first `update` will call `onCreate` callback + // the other ones will call `onUpdate` callback + if (!this.state.isCreated) { + this.state.isCreated = true; + this.options.onCreate(data); + } else { + this.options.onUpdate(data); + } +} + +/** + * Helper used to know if the given modifier is enabled. + * @method + * @memberof Popper.Utils + * @returns {Boolean} + */ +function isModifierEnabled(modifiers, modifierName) { + return modifiers.some(function (_ref) { + var name = _ref.name, + enabled = _ref.enabled; + return enabled && name === modifierName; + }); +} + +/** + * Get the prefixed supported property name + * @method + * @memberof Popper.Utils + * @argument {String} property (camelCase) + * @returns {String} prefixed property (camelCase) + */ +function getSupportedPropertyName(property) { + var prefixes = [false, 'ms', 'webkit', 'moz', 'o']; + var upperProp = property.charAt(0).toUpperCase() + property.slice(1); + + for (var i = 0; i < prefixes.length - 1; i++) { + var prefix = prefixes[i]; + var toCheck = prefix ? '' + prefix + upperProp : property; + if (typeof window.document.body.style[toCheck] !== 'undefined') { + return toCheck; + } + } + return null; +} + +/** + * Destroy the popper + * @method + * @memberof Popper + */ +function destroy() { + this.state.isDestroyed = true; + + // touch DOM only if `applyStyle` modifier is enabled + if (isModifierEnabled(this.modifiers, 'applyStyle')) { + this.popper.removeAttribute('x-placement'); + this.popper.style.left = ''; + this.popper.style.position = ''; + this.popper.style.top = ''; + this.popper.style[getSupportedPropertyName('transform')] = ''; + } + + this.disableEventListeners(); + + // remove the popper if user explicity asked for the deletion on destroy + // do not use `remove` because IE11 doesn't support it + if (this.options.removeOnDestroy) { + this.popper.parentNode.removeChild(this.popper); + } + return this; +} + +function attachToScrollParents(scrollParent, event, callback, scrollParents) { + var isBody = scrollParent.nodeName === 'BODY'; + var target = isBody ? window : scrollParent; + target.addEventListener(event, callback, { passive: true }); + + if (!isBody) { + attachToScrollParents(getScrollParent(target.parentNode), event, callback, scrollParents); + } + scrollParents.push(target); +} + +/** + * Setup needed event listeners used to update the popper position + * @method + * @memberof Popper.Utils + * @private + */ +function setupEventListeners(reference, options, state, updateBound) { + // Resize event listener on window + state.updateBound = updateBound; + window.addEventListener('resize', state.updateBound, { passive: true }); + + // Scroll event listener on scroll parents + var scrollElement = getScrollParent(reference); + attachToScrollParents(scrollElement, 'scroll', state.updateBound, state.scrollParents); + state.scrollElement = scrollElement; + state.eventsEnabled = true; + + return state; +} + +/** + * It will add resize/scroll events and start recalculating + * position of the popper element when they are triggered. + * @method + * @memberof Popper + */ +function enableEventListeners() { + if (!this.state.eventsEnabled) { + this.state = setupEventListeners(this.reference, this.options, this.state, this.scheduleUpdate); + } +} + +/** + * Remove event listeners used to update the popper position + * @method + * @memberof Popper.Utils + * @private + */ +function removeEventListeners(reference, state) { + // Remove resize event listener on window + window.removeEventListener('resize', state.updateBound); + + // Remove scroll event listener on scroll parents + state.scrollParents.forEach(function (target) { + target.removeEventListener('scroll', state.updateBound); + }); + + // Reset state + state.updateBound = null; + state.scrollParents = []; + state.scrollElement = null; + state.eventsEnabled = false; + return state; +} + +/** + * It will remove resize/scroll events and won't recalculate popper position + * when they are triggered. It also won't trigger onUpdate callback anymore, + * unless you call `update` method manually. + * @method + * @memberof Popper + */ +function disableEventListeners() { + if (this.state.eventsEnabled) { + window.cancelAnimationFrame(this.scheduleUpdate); + this.state = removeEventListeners(this.reference, this.state); + } +} + +/** + * Set the attributes to the given popper + * @method + * @memberof Popper.Utils + * @argument {Element} element - Element to apply the attributes to + * @argument {Object} styles + * Object with a list of properties and values which will be applied to the element + */ +function setAttributes(element, attributes) { + Object.keys(attributes).forEach(function (prop) { + var value = attributes[prop]; + if (value !== false) { + element.setAttribute(prop, attributes[prop]); + } else { + element.removeAttribute(prop); + } + }); +} + +/** + * @function + * @memberof Modifiers + * @argument {Object} data - The data object generated by `update` method + * @argument {Object} data.styles - List of style properties - values to apply to popper element + * @argument {Object} data.attributes - List of attribute properties - values to apply to popper element + * @argument {Object} options - Modifiers configuration and options + * @returns {Object} The same data object + */ +function applyStyle(data, options) { + // apply the final offsets to the popper + // NOTE: 1 DOM access here + var styles = { + position: data.offsets.popper.position + }; + + var attributes = { + 'x-placement': data.placement + }; + + // 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 = getSupportedPropertyName('transform'); + if (options.gpuAcceleration && prefixedProperty) { + styles[prefixedProperty] = 'translate3d(' + left + 'px, ' + top + 'px, 0)'; + styles.top = 0; + styles.left = 0; + styles.willChange = 'transform'; + } else { + // othwerise, we use the standard `left` and `top` properties + styles.left = left; + styles.top = top; + styles.willChange = 'top, left'; + } + + // 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! + setStyles(data.instance.popper, _extends({}, styles, data.styles)); + + // any property present in `data.attributes` will be applied to the popper, + // they will be set as HTML attributes of the element + setAttributes(data.instance.popper, _extends({}, attributes, data.attributes)); + + // if the arrow style has been computed, apply the arrow style + if (data.offsets.arrow) { + setStyles(data.arrowElement, data.offsets.arrow); + } + + return data; +} + +/** + * 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. + * @method + * @memberof Popper.modifiers + * @param {HTMLElement} reference - The reference element used to position the popper + * @param {HTMLElement} popper - The HTML element used as popper. + * @param {Object} options - Popper.js options + */ +function applyStyleOnLoad(reference, popper, options, modifierOptions, state) { + // compute reference element offsets + var referenceOffsets = getReferenceOffsets(state, popper, reference); + + // compute auto placement, store placement inside the data object, + // modifiers will be able to edit `placement` if needed + // and refer to originalPlacement to know the original value + var placement = computeAutoPlacement(options.placement, referenceOffsets, popper, reference, options.modifiers.flip.boundariesElement, options.modifiers.flip.padding); + + popper.setAttribute('x-placement', placement); + return options; +} + +/** + * Helper used to know if the given modifier depends from another one.<br /> + * It checks if the needed modifier is listed and enabled. + * @method + * @memberof Popper.Utils + * @param {Array} modifiers - list of modifiers + * @param {String} requestingName - name of requesting modifier + * @param {String} requestedName - name of requested modifier + * @returns {Boolean} + */ +function isModifierRequired(modifiers, requestingName, requestedName) { + var requesting = find(modifiers, function (_ref) { + var name = _ref.name; + return name === requestingName; + }); + + var isRequired = !!requesting && modifiers.some(function (modifier) { + return modifier.name === requestedName && modifier.enabled && modifier.order < requesting.order; + }); + + if (!isRequired) { + var _requesting = '`' + requestingName + '`'; + var requested = '`' + requestedName + '`'; + console.warn(requested + ' modifier is required by ' + _requesting + ' modifier in order to work, be sure to include it before ' + _requesting + '!'); + } + return isRequired; +} + +/** + * @function + * @memberof Modifiers + * @argument {Object} data - The data object generated by update method + * @argument {Object} options - Modifiers configuration and options + * @returns {Object} The data object, properly modified + */ +function arrow(data, options) { + // arrow depends on keepTogether in order to work + if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) { + return data; + } + + var arrowElement = options.element; + + // if arrowElement is a string, suppose it's a CSS selector + if (typeof arrowElement === 'string') { + arrowElement = data.instance.popper.querySelector(arrowElement); + + // if arrowElement is not found, don't run the modifier + if (!arrowElement) { + return data; + } + } else { + // if the arrowElement isn't a query selector we must check that the + // provided DOM node is child of its popper node + if (!data.instance.popper.contains(arrowElement)) { + console.warn('WARNING: `arrow.element` must be child of its popper element!'); + return data; + } + } + + var placement = data.placement.split('-')[0]; + var popper = getClientRect(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 altSide = isVertical ? 'left' : 'top'; + var opSide = isVertical ? 'bottom' : 'right'; + var arrowElementSize = getOuterSizes(arrowElement)[len]; + + // + // extends keepTogether behavior making sure the popper and its reference have enough pixels in conjuction + // + + // top/left side + if (reference[opSide] - arrowElementSize < popper[side]) { + data.offsets.popper[side] -= popper[side] - (reference[opSide] - arrowElementSize); + } + // bottom/right side + if (reference[side] + arrowElementSize > popper[opSide]) { + data.offsets.popper[side] += reference[side] + arrowElementSize - popper[opSide]; + } + + // compute center of the popper + var center = reference[side] + reference[len] / 2 - arrowElementSize / 2; + + // Compute the sideValue using the updated popper offsets + var sideValue = center - getClientRect(data.offsets.popper)[side]; + + // prevent arrowElement from being placed not contiguously to its popper + sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0); + + data.arrowElement = arrowElement; + data.offsets.arrow = {}; + data.offsets.arrow[side] = Math.floor(sideValue); + data.offsets.arrow[altSide] = ''; // make sure to unset any eventual altSide value from the DOM node + + return data; +} + +/** + * Get the opposite placement variation of the given one + * @method + * @memberof Popper.Utils + * @argument {String} placement variation + * @returns {String} flipped placement variation + */ +function getOppositeVariation(variation) { + if (variation === 'end') { + return 'start'; + } else if (variation === 'start') { + return 'end'; + } + return variation; +} + +/** + * List of accepted placements to use as values of the `placement` option.<br /> + * Valid placements are: + * - `auto` + * - `top` + * - `right` + * - `bottom` + * - `left` + * + * Each placement can have a variation from this list: + * - `-start` + * - `-end` + * + * Variations are interpreted easily if you think of them as the left to right + * written languages. Horizontally (`top` and `bottom`), `start` is left and `end` + * is right.<br /> + * Vertically (`left` and `right`), `start` is top and `end` is bottom. + * + * Some valid examples are: + * - `top-end` (on top of reference, right aligned) + * - `right-start` (on right of reference, top aligned) + * - `bottom` (on bottom, centered) + * - `auto-right` (on the side with more space available, alignment depends by placement) + * + * @static + * @type {Array} + * @enum {String} + * @readonly + * @method placements + * @memberof Popper + */ +var placements = ['auto-start', 'auto', 'auto-end', 'top-start', 'top', 'top-end', 'right-start', 'right', 'right-end', 'bottom-end', 'bottom', 'bottom-start', 'left-end', 'left', 'left-start']; + +// Get rid of `auto` `auto-start` and `auto-end` +var validPlacements = placements.slice(3); + +/** + * Given an initial placement, returns all the subsequent placements + * clockwise (or counter-clockwise). + * + * @method + * @memberof Popper.Utils + * @argument {String} placement - A valid placement (it accepts variations) + * @argument {Boolean} counter - Set to true to walk the placements counterclockwise + * @returns {Array} placements including their variations + */ +function clockwise(placement) { + var counter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false; + + var index = validPlacements.indexOf(placement); + var arr = validPlacements.slice(index + 1).concat(validPlacements.slice(0, index)); + return counter ? arr.reverse() : arr; +} + +var BEHAVIORS = { + FLIP: 'flip', + CLOCKWISE: 'clockwise', + COUNTERCLOCKWISE: 'counterclockwise' +}; + +/** + * @function + * @memberof Modifiers + * @argument {Object} data - The data object generated by update method + * @argument {Object} options - Modifiers configuration and options + * @returns {Object} The data object, properly modified + */ +function flip(data, options) { + // if `inner` modifier is enabled, we can't use the `flip` modifier + if (isModifierEnabled(data.instance.modifiers, 'inner')) { + 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 boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, options.boundariesElement); + + var placement = data.placement.split('-')[0]; + var placementOpposite = getOppositePlacement(placement); + var variation = data.placement.split('-')[1] || ''; + + var flipOrder = []; + + switch (options.behavior) { + case BEHAVIORS.FLIP: + flipOrder = [placement, placementOpposite]; + break; + case BEHAVIORS.CLOCKWISE: + flipOrder = clockwise(placement); + break; + case BEHAVIORS.COUNTERCLOCKWISE: + flipOrder = clockwise(placement, true); + break; + default: + flipOrder = options.behavior; + } + + flipOrder.forEach(function (step, index) { + if (placement !== step || flipOrder.length === index + 1) { + return data; + } + + placement = data.placement.split('-')[0]; + placementOpposite = getOppositePlacement(placement); + + var popperOffsets = getClientRect(data.offsets.popper); + var refOffsets = data.offsets.reference; + + // using floor because the reference offsets may contain decimals we are not going to consider here + var floor = Math.floor; + var overlapsRef = placement === 'left' && floor(popperOffsets.right) > floor(refOffsets.left) || placement === 'right' && floor(popperOffsets.left) < floor(refOffsets.right) || placement === 'top' && floor(popperOffsets.bottom) > floor(refOffsets.top) || placement === 'bottom' && floor(popperOffsets.top) < floor(refOffsets.bottom); + + var overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left); + var overflowsRight = floor(popperOffsets.right) > floor(boundaries.right); + var overflowsTop = floor(popperOffsets.top) < floor(boundaries.top); + var overflowsBottom = floor(popperOffsets.bottom) > floor(boundaries.bottom); + + var overflowsBoundaries = placement === 'left' && overflowsLeft || placement === 'right' && overflowsRight || placement === 'top' && overflowsTop || placement === 'bottom' && overflowsBottom; + + // flip the variation if required + var isVertical = ['top', 'bottom'].indexOf(placement) !== -1; + var flippedVariation = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom); + + if (overlapsRef || overflowsBoundaries || flippedVariation) { + // this boolean to detect any flip loop + data.flipped = true; + + if (overlapsRef || overflowsBoundaries) { + placement = flipOrder[index + 1]; + } + + if (flippedVariation) { + variation = getOppositeVariation(variation); + } + + data.placement = placement + (variation ? '-' + variation : ''); + + // this object contains `position`, we want to preserve it along with + // any additional property we may add in the future + data.offsets.popper = _extends({}, data.offsets.popper, getPopperOffsets(data.instance.popper, data.offsets.reference, data.placement)); + + data = runModifiers(data.instance.modifiers, data, 'flip'); + } + }); + return data; +} + +/** + * @function + * @memberof Modifiers + * @argument {Object} data - The data object generated by update method + * @argument {Object} options - Modifiers configuration and options + * @returns {Object} The data object, properly modified + */ +function keepTogether(data) { + var popper = getClientRect(data.offsets.popper); + var reference = data.offsets.reference; + var placement = data.placement.split('-')[0]; + var floor = Math.floor; + var isVertical = ['top', 'bottom'].indexOf(placement) !== -1; + var side = isVertical ? 'right' : 'bottom'; + var opSide = isVertical ? 'left' : 'top'; + var measurement = isVertical ? 'width' : 'height'; + + if (popper[side] < floor(reference[opSide])) { + data.offsets.popper[opSide] = floor(reference[opSide]) - popper[measurement]; + } + if (popper[opSide] > floor(reference[side])) { + data.offsets.popper[opSide] = floor(reference[side]); + } + + return data; +} + +/** + * Converts a string containing value + unit into a px value number + * @function + * @memberof {modifiers~offset} + * @private + * @argument {String} str - Value + unit string + * @argument {String} measurement - `height` or `width` + * @argument {Object} popperOffsets + * @argument {Object} referenceOffsets + * @returns {Number|String} + * Value in pixels, or original string if no values were extracted + */ +function toValue(str, measurement, popperOffsets, referenceOffsets) { + // separate value from unit + var split = str.match(/((?:\-|\+)?\d*\.?\d*)(.*)/); + var value = +split[1]; + var unit = split[2]; + + // If it's not a number it's an operator, I guess + if (!value) { + return str; + } + + if (unit.indexOf('%') === 0) { + var element = void 0; + switch (unit) { + case '%p': + element = popperOffsets; + break; + case '%': + case '%r': + default: + element = referenceOffsets; + } + + var rect = getClientRect(element); + return rect[measurement] / 100 * value; + } else if (unit === 'vh' || unit === 'vw') { + // if is a vh or vw, we calculate the size based on the viewport + var size = void 0; + if (unit === 'vh') { + size = Math.max(document.documentElement.clientHeight, window.innerHeight || 0); + } else { + size = Math.max(document.documentElement.clientWidth, window.innerWidth || 0); + } + return size / 100 * value; + } else { + // if is an explicit pixel unit, we get rid of the unit and keep the value + // if is an implicit unit, it's px, and we return just the value + return value; + } +} + +/** + * Parse an `offset` string to extrapolate `x` and `y` numeric offsets. + * @function + * @memberof {modifiers~offset} + * @private + * @argument {String} offset + * @argument {Object} popperOffsets + * @argument {Object} referenceOffsets + * @argument {String} basePlacement + * @returns {Array} a two cells array with x and y offsets in numbers + */ +function parseOffset(offset, popperOffsets, referenceOffsets, basePlacement) { + var offsets = [0, 0]; + + // Use height if placement is left or right and index is 0 otherwise use width + // in this way the first offset will use an axis and the second one + // will use the other one + var useHeight = ['right', 'left'].indexOf(basePlacement) !== -1; + + // Split the offset string to obtain a list of values and operands + // The regex addresses values with the plus or minus sign in front (+10, -20, etc) + var fragments = offset.split(/(\+|\-)/).map(function (frag) { + return frag.trim(); + }); + + // Detect if the offset string contains a pair of values or a single one + // they could be separated by comma or space + var divider = fragments.indexOf(find(fragments, function (frag) { + return frag.search(/,|\s/) !== -1; + })); + + if (fragments[divider] && fragments[divider].indexOf(',') === -1) { + console.warn('Offsets separated by white space(s) are deprecated, use a comma (,) instead.'); + } + + // If divider is found, we divide the list of values and operands to divide + // them by ofset X and Y. + var splitRegex = /\s*,\s*|\s+/; + var ops = divider !== -1 ? [fragments.slice(0, divider).concat([fragments[divider].split(splitRegex)[0]]), [fragments[divider].split(splitRegex)[1]].concat(fragments.slice(divider + 1))] : [fragments]; + + // Convert the values with units to absolute pixels to allow our computations + ops = ops.map(function (op, index) { + // Most of the units rely on the orientation of the popper + var measurement = (index === 1 ? !useHeight : useHeight) ? 'height' : 'width'; + var mergeWithPrevious = false; + return op + // This aggregates any `+` or `-` sign that aren't considered operators + // e.g.: 10 + +5 => [10, +, +5] + .reduce(function (a, b) { + if (a[a.length - 1] === '' && ['+', '-'].indexOf(b) !== -1) { + a[a.length - 1] = b; + mergeWithPrevious = true; + return a; + } else if (mergeWithPrevious) { + a[a.length - 1] += b; + mergeWithPrevious = false; + return a; + } else { + return a.concat(b); + } + }, []) + // Here we convert the string values into number values (in px) + .map(function (str) { + return toValue(str, measurement, popperOffsets, referenceOffsets); + }); + }); + + // Loop trough the offsets arrays and execute the operations + ops.forEach(function (op, index) { + op.forEach(function (frag, index2) { + if (isNumeric(frag)) { + offsets[index] += frag * (op[index2 - 1] === '-' ? -1 : 1); + } + }); + }); + return offsets; +} + +/** + * @function + * @memberof Modifiers + * @argument {Object} data - The data object generated by update method + * @argument {Object} options - Modifiers configuration and options + * @argument {Number|String} options.offset=0 + * The offset value as described in the modifier description + * @returns {Object} The data object, properly modified + */ +function offset(data, _ref) { + var offset = _ref.offset; + var placement = data.placement, + _data$offsets = data.offsets, + popper = _data$offsets.popper, + reference = _data$offsets.reference; + + var basePlacement = placement.split('-')[0]; + + var offsets = void 0; + if (isNumeric(+offset)) { + offsets = [+offset, 0]; + } else { + offsets = parseOffset(offset, popper, reference, basePlacement); + } + + if (basePlacement === 'left') { + popper.top += offsets[0]; + popper.left -= offsets[1]; + } else if (basePlacement === 'right') { + popper.top += offsets[0]; + popper.left += offsets[1]; + } else if (basePlacement === 'top') { + popper.left += offsets[0]; + popper.top -= offsets[1]; + } else if (basePlacement === 'bottom') { + popper.left += offsets[0]; + popper.top += offsets[1]; + } + + data.popper = popper; + return data; +} + +/** + * @function + * @memberof Modifiers + * @argument {Object} data - The data object generated by `update` method + * @argument {Object} options - Modifiers configuration and options + * @returns {Object} The data object, properly modified + */ +function preventOverflow(data, options) { + var boundariesElement = options.boundariesElement || getOffsetParent(data.instance.popper); + var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement); + options.boundaries = boundaries; + + var order = options.priority; + var popper = getClientRect(data.offsets.popper); + + var check = { + primary: function primary(placement) { + var value = popper[placement]; + if (popper[placement] < boundaries[placement] && !options.escapeWithReference) { + value = Math.max(popper[placement], boundaries[placement]); + } + return defineProperty({}, placement, value); + }, + secondary: function secondary(placement) { + var mainSide = placement === 'right' ? 'left' : 'top'; + var value = popper[mainSide]; + if (popper[placement] > boundaries[placement] && !options.escapeWithReference) { + value = Math.min(popper[mainSide], boundaries[placement] - (placement === 'right' ? popper.width : popper.height)); + } + return defineProperty({}, mainSide, value); + } + }; + + order.forEach(function (placement) { + var side = ['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary'; + popper = _extends({}, popper, check[side](placement)); + }); + + data.offsets.popper = popper; + + return data; +} + +/** + * @function + * @memberof Modifiers + * @argument {Object} data - The data object generated by `update` method + * @argument {Object} options - Modifiers configuration and options + * @returns {Object} The data object, properly modified + */ +function shift(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 = getClientRect(data.offsets.popper); + var isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1; + var side = isVertical ? 'left' : 'top'; + var measurement = isVertical ? 'width' : 'height'; + + var shiftOffsets = { + start: defineProperty({}, side, reference[side]), + end: defineProperty({}, side, reference[side] + reference[measurement] - popper[measurement]) + }; + + data.offsets.popper = _extends({}, popper, shiftOffsets[shiftvariation]); + } + + return data; +} + +/** + * @function + * @memberof Modifiers + * @argument {Object} data - The data object generated by update method + * @argument {Object} options - Modifiers configuration and options + * @returns {Object} The data object, properly modified + */ +function hide(data) { + if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) { + return data; + } + + var refRect = data.offsets.reference; + var bound = find(data.instance.modifiers, function (modifier) { + return modifier.name === 'preventOverflow'; + }).boundaries; + + if (refRect.bottom < bound.top || refRect.left > bound.right || refRect.top > bound.bottom || refRect.right < bound.left) { + // Avoid unnecessary DOM access if visibility hasn't changed + if (data.hide === true) { + return data; + } + + data.hide = true; + data.attributes['x-out-of-boundaries'] = ''; + } else { + // Avoid unnecessary DOM access if visibility hasn't changed + if (data.hide === false) { + return data; + } + + data.hide = false; + data.attributes['x-out-of-boundaries'] = false; + } + + return data; +} + +/** + * @function + * @memberof Modifiers + * @argument {Object} data - The data object generated by `update` method + * @argument {Object} options - Modifiers configuration and options + * @returns {Object} The data object, properly modified + */ +function inner(data) { + var placement = data.placement; + var basePlacement = placement.split('-')[0]; + var popper = getClientRect(data.offsets.popper); + var reference = getClientRect(data.offsets.reference); + var isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1; + + var subtractLength = ['top', 'left'].indexOf(basePlacement) === -1; + + popper[isHoriz ? 'left' : 'top'] = reference[placement] - (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0); + + data.placement = getOppositePlacement(placement); + data.offsets.popper = getClientRect(popper); + + return data; +} + +/** + * Modifier function, each modifier can have a function of this type assigned + * to its `fn` property.<br /> + * These functions will be called on each update, this means that you must + * make sure they are performant enough to avoid performance bottlenecks. + * + * @function ModifierFn + * @argument {dataObject} data - The data object generated by `update` method + * @argument {Object} options - Modifiers configuration and options + * @returns {dataObject} The data object, properly modified + */ + +/** + * Modifiers are plugins used to alter the behavior of your poppers.<br /> + * Popper.js uses a set of 9 modifiers to provide all the basic functionalities + * needed by the library. + * + * Usually you don't want to override the `order`, `fn` and `onLoad` props. + * All the other properties are configurations that could be tweaked. + * @namespace modifiers + */ +var modifiers = { + /** + * Modifier used to shift the popper on the start or end of its reference + * element.<br /> + * It will read the variation of the `placement` property.<br /> + * It can be one either `-end` or `-start`. + * @memberof modifiers + * @inner + */ + shift: { + /** @prop {number} order=100 - Index used to define the order of execution */ + order: 100, + /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */ + enabled: true, + /** @prop {ModifierFn} */ + fn: shift + }, + + /** + * The `offset` modifier can shift your popper on both its axis. + * + * It accepts the following units: + * - `px` or unitless, interpreted as pixels + * - `%` or `%r`, percentage relative to the length of the reference element + * - `%p`, percentage relative to the length of the popper element + * - `vw`, CSS viewport width unit + * - `vh`, CSS viewport height unit + * + * For length is intended the main axis relative to the placement of the popper.<br /> + * This means that if the placement is `top` or `bottom`, the length will be the + * `width`. In case of `left` or `right`, it will be the height. + * + * You can provide a single value (as `Number` or `String`), or a pair of values + * as `String` divided by a comma or one (or more) white spaces.<br /> + * The latter is a deprecated method because it leads to confusion and will be + * removed in v2.<br /> + * Additionally, it accepts additions and subtractions between different units. + * Note that multiplications and divisions aren't supported. + * + * Valid examples are: + * ``` + * 10 + * '10%' + * '10, 10' + * '10%, 10' + * '10 + 10%' + * '10 - 5vh + 3%' + * '-10px + 5vh, 5px - 6%' + * ``` + * + * @memberof modifiers + * @inner + */ + offset: { + /** @prop {number} order=200 - Index used to define the order of execution */ + order: 200, + /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */ + enabled: true, + /** @prop {ModifierFn} */ + fn: offset, + /** @prop {Number|String} offset=0 + * The offset value as described in the modifier description + */ + offset: 0 + }, + + /** + * Modifier used to prevent the popper from being positioned outside the boundary. + * + * An scenario exists where the reference itself is not within the boundaries.<br /> + * We can say it has "escaped the boundaries" — or just "escaped".<br /> + * In this case we need to decide whether the popper should either: + * + * - detach from the reference and remain "trapped" in the boundaries, or + * - if it should ignore the boundary and "escape with its reference" + * + * When `escapeWithReference` is set to`true` and reference is completely + * outside its boundaries, the popper will overflow (or completely leave) + * the boundaries in order to remain attached to the edge of the reference. + * + * @memberof modifiers + * @inner + */ + preventOverflow: { + /** @prop {number} order=300 - Index used to define the order of execution */ + order: 300, + /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */ + enabled: true, + /** @prop {ModifierFn} */ + fn: preventOverflow, + /** + * @prop {Array} priority=['left', 'right', 'top', 'bottom'] + * Popper will try to prevent overflow following these priorities by default, + * then, it could overflow on the left and on top of the `boundariesElement` + */ + priority: ['left', 'right', 'top', 'bottom'], + /** + * @prop {number} padding=5 + * Amount of pixel used to define a minimum distance between the boundaries + * and the popper this makes sure the popper has always a little padding + * between the edges of its container + */ + padding: 5, + /** + * @prop {String|HTMLElement} boundariesElement='scrollParent' + * Boundaries used by the modifier, can be `scrollParent`, `window`, + * `viewport` or any DOM element. + */ + boundariesElement: 'scrollParent' + }, + + /** + * Modifier used to make sure the reference and its popper stay near eachothers + * without leaving any gap between the two. Expecially useful when the arrow is + * enabled and you want to assure it to point to its reference element. + * It cares only about the first axis, you can still have poppers with margin + * between the popper and its reference element. + * @memberof modifiers + * @inner + */ + keepTogether: { + /** @prop {number} order=400 - Index used to define the order of execution */ + order: 400, + /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */ + enabled: true, + /** @prop {ModifierFn} */ + fn: keepTogether + }, + + /** + * This modifier is used to move the `arrowElement` of the popper to make + * sure it is positioned between the reference element and its popper element. + * It will read the outer size of the `arrowElement` node to detect how many + * pixels of conjuction are needed. + * + * It has no effect if no `arrowElement` is provided. + * @memberof modifiers + * @inner + */ + arrow: { + /** @prop {number} order=500 - Index used to define the order of execution */ + order: 500, + /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */ + enabled: true, + /** @prop {ModifierFn} */ + fn: arrow, + /** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */ + element: '[x-arrow]' + }, + + /** + * Modifier used to flip the popper's placement when it starts to overlap its + * reference element. + * + * Requires the `preventOverflow` modifier before it in order to work. + * + * **NOTE:** this modifier will interrupt the current update cycle and will + * restart it if it detects the need to flip the placement. + * @memberof modifiers + * @inner + */ + flip: { + /** @prop {number} order=600 - Index used to define the order of execution */ + order: 600, + /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */ + enabled: true, + /** @prop {ModifierFn} */ + fn: flip, + /** + * @prop {String|Array} behavior='flip' + * The behavior used to change the popper's placement. It can be one of + * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid + * placements (with optional variations). + */ + behavior: 'flip', + /** + * @prop {number} padding=5 + * The popper will flip if it hits the edges of the `boundariesElement` + */ + padding: 5, + /** + * @prop {String|HTMLElement} 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) + */ + boundariesElement: 'viewport' + }, + + /** + * Modifier used to make the popper flow toward the inner of the reference element. + * By default, when this modifier is disabled, the popper will be placed outside + * the reference element. + * @memberof modifiers + * @inner + */ + inner: { + /** @prop {number} order=700 - Index used to define the order of execution */ + order: 700, + /** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */ + enabled: false, + /** @prop {ModifierFn} */ + fn: inner + }, + + /** + * Modifier used to hide the popper when its reference element is outside of the + * popper boundaries. It will set a `x-out-of-boundaries` attribute which can + * be used to hide with a CSS selector the popper when its reference is + * out of boundaries. + * + * Requires the `preventOverflow` modifier before it in order to work. + * @memberof modifiers + * @inner + */ + hide: { + /** @prop {number} order=800 - Index used to define the order of execution */ + order: 800, + /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */ + enabled: true, + /** @prop {ModifierFn} */ + fn: hide + }, + + /** + * Applies the computed styles to the popper element. + * + * All the DOM manipulations are limited to this modifier. This is useful in case + * you want to integrate Popper.js inside a framework or view library and you + * want to delegate all the DOM manipulations to it. + * + * Just disable this modifier and define you own to achieve the desired effect. + * + * @memberof modifiers + * @inner + */ + applyStyle: { + /** @prop {number} order=900 - Index used to define the order of execution */ + order: 900, + /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */ + enabled: true, + /** @prop {ModifierFn} */ + fn: applyStyle, + /** @prop {Function} */ + onLoad: applyStyleOnLoad, + /** + * @prop {Boolean} gpuAcceleration=true + * If true, it uses the CSS 3d transformation to position the popper. + * Otherwise, it will use the `top` and `left` properties. + */ + gpuAcceleration: true + } +}; + +/** + * The `dataObject` is an object containing all the informations used by Popper.js + * this object get passed to modifiers and to the `onCreate` and `onUpdate` callbacks. + * @name dataObject + * @property {Object} data.instance The Popper.js instance + * @property {String} data.placement Placement applied to popper + * @property {String} data.originalPlacement Placement originally defined on init + * @property {Boolean} data.flipped True if popper has been flipped by flip modifier + * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper. + * @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier + * @property {Object} data.styles Any CSS property defined here will be applied to the popper, it expects the JavaScript nomenclature (eg. `marginBottom`) + * @property {Object} data.boundaries Offsets of the popper boundaries + * @property {Object} data.offsets The measurements of popper, reference and arrow elements. + * @property {Object} data.offsets.popper `top`, `left`, `width`, `height` values + * @property {Object} data.offsets.reference `top`, `left`, `width`, `height` values + * @property {Object} data.offsets.arrow] `top` and `left` offsets, only one of them will be different from 0 + */ + +/** + * Default options provided to Popper.js constructor.<br /> + * These can be overriden using the `options` argument of Popper.js.<br /> + * To override an option, simply pass as 3rd argument an object with the same + * structure of this object, example: + * ``` + * new Popper(ref, pop, { + * modifiers: { + * preventOverflow: { enabled: false } + * } + * }) + * ``` + * @type {Object} + * @static + * @memberof Popper + */ +var DEFAULTS = { + /** + * Popper's placement + * @prop {Popper.placements} placement='bottom' + */ + placement: 'bottom', + + /** + * Whether events (resize, scroll) are initially enabled + * @prop {Boolean} eventsEnabled=true + */ + eventsEnabled: true, + + /** + * Set to true if you want to automatically remove the popper when + * you call the `destroy` method. + * @prop {Boolean} removeOnDestroy=false + */ + removeOnDestroy: false, + + /** + * Callback called when the popper is created.<br /> + * By default, is set to no-op.<br /> + * Access Popper.js instance with `data.instance`. + * @prop {onCreate} + */ + onCreate: function onCreate() {}, + + /** + * Callback called when the popper is updated, this callback is not called + * on the initialization/creation of the popper, but only on subsequent + * updates.<br /> + * By default, is set to no-op.<br /> + * Access Popper.js instance with `data.instance`. + * @prop {onUpdate} + */ + onUpdate: function onUpdate() {}, + + /** + * List of modifiers used to modify the offsets before they are applied to the popper. + * They provide most of the functionalities of Popper.js + * @prop {modifiers} + */ + modifiers: modifiers +}; + +/** + * @callback onCreate + * @param {dataObject} data + */ + +/** + * @callback onUpdate + * @param {dataObject} data + */ + +// Utils +// Methods +var Popper = function () { + /** + * Create a new Popper.js instance + * @class Popper + * @param {HTMLElement|referenceObject} reference - The reference element used to position the popper + * @param {HTMLElement} popper - The HTML element used as popper. + * @param {Object} options - Your custom options to override the ones defined in [DEFAULTS](#defaults) + * @return {Object} instance - The generated Popper.js instance + */ + function Popper(reference, popper) { + var _this = this; + + var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {}; + classCallCheck(this, Popper); + + this.scheduleUpdate = function () { + return requestAnimationFrame(_this.update); + }; + + // make update() debounced, so that it only runs at most once-per-tick + this.update = debounce(this.update.bind(this)); + + // with {} we create a new object with the options inside it + this.options = _extends({}, Popper.Defaults, options); + + // init state + this.state = { + isDestroyed: false, + isCreated: false, + scrollParents: [] + }; + + // get reference and popper elements (allow jQuery wrappers) + this.reference = reference.jquery ? reference[0] : reference; + this.popper = popper.jquery ? popper[0] : popper; + + // make sure to apply the popper position before any computation + setStyles(this.popper, { position: 'absolute' }); + + // Deep merge modifiers options + this.options.modifiers = {}; + Object.keys(_extends({}, Popper.Defaults.modifiers, options.modifiers)).forEach(function (name) { + _this.options.modifiers[name] = _extends({}, Popper.Defaults.modifiers[name] || {}, options.modifiers ? options.modifiers[name] : {}); + }); + + // Refactoring modifiers' list (Object => Array) + this.modifiers = Object.keys(this.options.modifiers).map(function (name) { + return _extends({ + name: name + }, _this.options.modifiers[name]); + }) + // sort the modifiers by order + .sort(function (a, b) { + return a.order - b.order; + }); + + // modifiers have the ability to execute arbitrary code when Popper.js get inited + // such code is executed in the same order of its modifier + // they could add new properties to their options configuration + // BE AWARE: don't add options to `options.modifiers.name` but to `modifierOptions`! + this.modifiers.forEach(function (modifierOptions) { + if (modifierOptions.enabled && isFunction(modifierOptions.onLoad)) { + modifierOptions.onLoad(_this.reference, _this.popper, _this.options, modifierOptions, _this.state); + } + }); + + // fire the first update to position the popper in the right place + this.update(); + + var eventsEnabled = this.options.eventsEnabled; + if (eventsEnabled) { + // setup event listeners, they will take care of update the position in specific situations + this.enableEventListeners(); + } + + this.state.eventsEnabled = eventsEnabled; + } + + // We can't use class properties because they don't get listed in the + // class prototype and break stuff like Sinon stubs + + + createClass(Popper, [{ + key: 'update', + value: function update$$1() { + return update.call(this); + } + }, { + key: 'destroy', + value: function destroy$$1() { + return destroy.call(this); + } + }, { + key: 'enableEventListeners', + value: function enableEventListeners$$1() { + return enableEventListeners.call(this); + } + }, { + key: 'disableEventListeners', + value: function disableEventListeners$$1() { + return disableEventListeners.call(this); + } + + /** + * Schedule an update, it will run on the next UI update available + * @method scheduleUpdate + * @memberof Popper + */ + + + /** + * Collection of utilities useful when writing custom modifiers. + * Starting from version 1.7, this method is available only if you + * include `popper-utils.js` before `popper.js`. + * + * **DEPRECATION**: This way to access PopperUtils is deprecated + * and will be removed in v2! Use the PopperUtils module directly instead. + * @static + * @type {Object} + * @deprecated since version 1.8 + * @member Utils + * @memberof Popper + */ + + }]); + return Popper; +}(); + +/** + * The `referenceObject` is an object that provides an interface compatible with Popper.js + * and lets you use it as replacement of a real DOM node.<br /> + * You can use this method to position a popper relatively to a set of coordinates + * in case you don't have a DOM node to use as reference. + * + * ``` + * new Popper(referenceObject, popperNode); + * ``` + * + * NB: This feature isn't supported in Internet Explorer 10 + * @name referenceObject + * @property {Function} data.getBoundingClientRect + * A function that returns a set of coordinates compatible with the native `getBoundingClientRect` method. + * @property {number} data.clientWidth + * An ES6 getter that will return the width of the virtual reference element. + * @property {number} data.clientHeight + * An ES6 getter that will return the height of the virtual reference element. + */ + + +Popper.Utils = (typeof window !== 'undefined' ? window : global).PopperUtils; +Popper.placements = placements; +Popper.Defaults = DEFAULTS; + +return Popper; + +}))); +//# sourceMappingURL=popper.js.map + |