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// External dependencies import { EventEmitter } from 'events'; import assign from 'lodash/assign'; import cloneDeep from 'lodash/cloneDeep'; import compact from 'lodash/compact'; import filter from 'lodash/filter'; import forEach from 'lodash/forEach'; import get from 'lodash/get'; import has from 'lodash/has'; import head from 'lodash/head'; import includes from 'lodash/includes'; import isEqual from 'lodash/isEqual'; import isFunction from 'lodash/isFunction'; import isObject from 'lodash/isObject'; import isUndefined from 'lodash/isUndefined'; import keys from 'lodash/keys'; import last from 'lodash/last'; import map from 'lodash/map'; import mapKeys from 'lodash/mapKeys'; import set from 'lodash/set'; import size from 'lodash/size'; import slice from 'lodash/slice'; import sortBy from 'lodash/sortBy'; import $ from 'jquery'; // Internal dependencies import { isOrHasValue, } from '@frontend-builder/utils/responsive-options-pure'; import { top_window, } from '@core-ui/utils/frame-helpers'; import ETScriptDocumentStore from './document'; import ETScriptWindowStore from './window'; import { getOffsets, isBFB, isBuilder, isDiviTheme, isExtraTheme, isLBB, isTB, isVB, maybeDecreaseEmitterMaxListeners, maybeIncreaseEmitterMaxListeners, registerFrontendComponent, } from '../utils/utils'; import { filterInvalidModules, getLimit, } from '../utils/sticky'; // Event Constants const SETTINGS_CHANGE = 'settings_change'; // Variables const $body = $('body'); const hasFixedNav = $body.hasClass('et_fixed_nav'); /** * Saved sticky elements. In FE, this means all the sticky settings that exist on current page. * In VB (and other builder context) this means sticky settings that exist on current page but * is rendered outside current builder type. Removed nested sticky module (sticky inside another * sticky module) from the module list. * * @since 4.6.0 * * @type {object} */ const savedStickyElements = filterInvalidModules(cloneDeep(window.et_pb_sticky_elements)); /** * Defaults of known non module elements which its stickiness needs to be considered. * * @since 4.6.0 * * @type {object} */ const elementsDefaults = { wpAdminBar: { id: 'wpAdminBar', selector: '#wpadminbar', exist: false, height: 0, window: 'top', condition: () => { // Admin bar doesn't have fixed position in smaller breakpoint const isPositionFixed = 'fixed' === top_window.jQuery(elements.wpAdminBar.selector).css('position'); // When Responsive View's control is visible, admin bar offset becomes irrelevant. Note: // At this point the `height` value might not be updated yet, so manually get the height // value via `getHeight()` method. const hasVbAppFramePaddingTop = elements.builderAppFramePaddingTop.getHeight() > 0; return ! hasVbAppFramePaddingTop && ! isTB && ! isLBB && isPositionFixed; }, }, diviFixedPrimaryNav: { id: 'diviPrimaryNav', selector: '#main-header', exist: false, height: 0, window: 'app', condition: () => { // Divi Theme has fixed nav. Note: vertical header automatically removes .et_fixed_nav // classname so it is fine just to test fixed nav state against .et_fixed_nav classname only const hasFixedNavBodyClass = isDiviTheme && hasFixedNav; // Check for element's existence const isNavExist = $(elements.diviFixedPrimaryNav.selector).length > 0; // Primary nav is doesn't have fixed position in smaller breakpoint const isPositionFixed = 'fixed' === $(elements.diviFixedPrimaryNav.selector).css('position'); return hasFixedNavBodyClass && isNavExist && isPositionFixed; }, getHeight: () => { const $mainHeader = $(elementsDefaults.diviFixedPrimaryNav.selector); // Bail if this isn't Divi if (! isDiviTheme && 1 > $mainHeader.length) { return 0; } // Clone header const $clone = $mainHeader.clone(); // Emulate fixed header state. Fixed header state is emulated as soon as the window is // scrolled so it is safe to assume that any sticky module on its sticky state will "meet" // header on its fixed state; this will avoid unwanted "jump" effect that happens because // fixed header has 400ms transition which could be slower than scroll speed; The fixed header // state also adds negative margin top state to #page-container which triggers document // dimension change event. Also add classname which will ensure that this clone won't // be visible to end user even if we only render it for a split second to avoid issues $clone.addClass('et-fixed-header et-script-temporary-measurement'); // Add it to layout so its dimension can be measured $mainHeader.parent().append($clone); // Measure the fixed header height const height = $clone.outerHeight(); // Immediately remove the cloned DOM from layout $clone.remove(); return parseFloat(height); }, }, diviFixedSecondaryNav: { id: 'diviPrimaryNav', selector: '#top-header', exist: false, height: 0, window: 'app', condition: () => { // Divi Theme has fixed nav. Note: vertical header automatically removes .et_fixed_nav // classname so it is fine just to test fixed nav state against .et_fixed_nav classname only const hasFixedNavBodyClass = isDiviTheme && hasFixedNav; // Check for element's existence const isNavExist = $(elements.diviFixedSecondaryNav.selector).length > 0; // Primary nav is doesn't have fixed position in smaller breakpoint const isPositionFixed = 'fixed' === $(elements.diviFixedSecondaryNav.selector).css('position'); return hasFixedNavBodyClass && isNavExist && isPositionFixed; }, }, extraFixedPrimaryNav: { id: 'extraFixedPrimaryNav', selector: '#main-header', exist: false, height: 0, window: 'app', condition: () => { if (! isObject(ETScriptWindowStore) || ! isExtraTheme) { return false; } // Extra Theme has fixed nav. const hasFixedNavBodyClass = isExtraTheme && hasFixedNav; // Check for element's existence. const isNavExist = $(elements.extraFixedPrimaryNav.selector).length > 0; // Extra has its own breakpoint for fixed nav. Detecting computed style is most likely fail // because retrieved value is always one step behind before the computed style result is retrieved const isPositionFixed = 1024 <= (ETScriptWindowStore.width + ETScriptWindowStore.verticalScrollBar); return hasFixedNavBodyClass && isNavExist && isPositionFixed; }, getHeight: () => { const $mainHeader = $(elementsDefaults.extraFixedPrimaryNav.selector); // Bail if this isn't Extra if (! isExtraTheme && 1 > $mainHeader.length) { return 0; } // Clone header const $clone = $mainHeader.clone(); // Emulate fixed header state. Fixed header state is emulated as soon as the window is // scrolled so it is safe to assume that any sticky module on its sticky state will "meet" // header on its fixed state; this will avoid unwanted "jump" effect that happens because // fixed header has 500ms transition which could be slower than scroll speed; The fixed header // state also adds negative margin top state to #page-container which triggers document // dimension change event. Also add classname which will ensure that this clone won't // be visible to end user even if we only render it for a split second to avoid issues $clone.addClass('et-fixed-header et-script-temporary-measurement'); // Add it to layout so its dimension can be measured $mainHeader.parent().append($clone); // Measure the fixed header height const height = $clone.outerHeight(); // Immediately remove the cloned DOM from layout $clone.remove(); return parseFloat(height); }, }, builderAppFramePaddingTop: { id: 'builderAppFramePaddingTop', selector: isBFB ? '#et-bfb-app-frame' : '#et-fb-app-frame', exist: false, height: 0, window: 'top', getHeight: () => { const selector = elements.builderAppFramePaddingTop.selector; const cssProperty = isBFB ? 'marginTop' : 'paddingTop'; const paddingTop = top_window.jQuery(selector).css(cssProperty); return parseFloat(paddingTop); } }, tbHeader: { id: 'et-tb-branded-modal__header', selector: '.et-tb-branded-modal__header', exist: false, height: 0, window: 'top', }, lbbHeader: { id: 'et-block-builder-modal--header', selector: '.et-block-builder-modal--header', exist: false, height: 0, window: 'top', }, gbHeader: { id: 'edit-post-header', // This selector exist on WP 5.4 and below; hence these are used instead of `.block-editor-editor-skeleton__header` selector: '.edit-post-header', exist: false, height: 0, window: 'top', }, gbFooter: { id: 'block-editor-editor-skeleton__footer', selector: '.block-editor-editor-skeleton__footer', exist: false, height: 0, window: 'top', }, gbComponentsNoticeList: { id: 'components-notice-list', selector: '.components-notice-list', exist: false, height: 0, window: 'top', multiple: true, }, }; /** * Known non module elements which its stickiness needs to be considered. * * @since 4.6.0 * * @type {object} */ const elements = cloneDeep(elementsDefaults); // States /** * Hold all sticky elements modules' properties. * * @since 4.6.0 * * @type {object} */ let modules = {}; /** * Sticky Elements store. * * This store stores selected properties of all sticky elements on the page so a sticky element * can use other sticky element's calculated value quickly. * * @since 4.6.0 */ class ETScriptStickyStore extends EventEmitter { /** * ETScriptStickyStore constructor. * * @since 4.6.0 */ constructor() { super(); // Load modules passed via global variable from server via wp_localize_script() assign(modules, savedStickyElements); // Caculate top/bottom offsetModules which are basically list of sticky elements that need // to be considered for additional offset calculation when `Offset From Surrounding Sticky Elements` // option is toggled `on` this.generateOffsetModules(); // Calculate known elements' properties. This needs to be done after DOM is ready if (isVB) { $(window).on('et_fb_init_app_after', () => { this.setElementsProps(); }); } else { $(document).ready(() => { this.setElementsProps(); }); } // Some props need to be updated when document height is changed (eg. fixed nav's height) ETScriptDocumentStore.addHeightChangeListener(this.onDocumentHeightChange); // Builder specific event callback if (isBuilder) { // Event callback once the builder has been mounted $(window).on('et_fb_root_did_mount', this.onBuilderDidMount); // Listen to builder change if current window is builder window window.addEventListener('ETBuilderStickySettingsSyncs', this.onBuilderSettingsChange); } } /** * Get registered modules. * * @since 4.6.0 * * @type {object} */ get modules() { return modules; } /** * List of builder options (that is used by sticky elements) that has responsive mode. * * @since 4.6.0 * * @returns {Array} */ get responsiveOptions() { const options = [ 'position', 'topOffset', 'bottomOffset', 'topLimit', 'bottomLimit', 'offsetSurrounding', 'transition', 'topOffsetModules', 'bottomOffsetModules', ]; return options; } /** * Update selected module / elements prop on document height change. * * @since 4.6.0 */ onDocumentHeightChange = () => { // Update Divi fixed nav height property. Divi fixed nav height change when it enters its sticky state // thus making it having different height when sits on top of viewport and during window scroll if (this.getElementProp('diviFixedPrimaryNav', 'exist', false)) { const getHeight = this.getElementProp('diviFixedPrimaryNav', 'getHeight'); this.setElementProp('diviFixedPrimaryNav', 'height', getHeight()); } // Update Extra's fixed height property. Extra fixed nav height changes as the window is scrolled if (this.getElementProp('extraFixedPrimaryNav', 'exist', false)) { const getExtraFixedMainHeaderHeight = this.getElementProp('extraFixedPrimaryNav', 'getHeight'); this.setElementProp('extraFixedPrimaryNav', 'height', getExtraFixedMainHeaderHeight()); } if (this.getElementProp('builderAppFramePaddingTop', 'exist', false)) { this.setElementHeight('builderAppFramePaddingTop'); } } /** * Builder did mount listener callback. * * @since 4.6.0 */ onBuilderDidMount = () => { const stickyOnloadModuleKeys = keys(window.et_pb_sticky_elements); const stickyMountedModuleKeys = keys(this.modules); // Has sticky elements but builder has no saved sticky module; sticky element on current // page is outside current builder (eg. page builder has with no sticky element saved but // TB header of current page has sticky element). Need to emit change to kickstart the stick // element initialization and generating offset modules if (stickyOnloadModuleKeys.length > 0 && isEqual(stickyOnloadModuleKeys, stickyMountedModuleKeys)) { this.onBuilderSettingsChange(undefined, true); } } /** * Builder settings change listener callback. * * @since 4.6.0 * * @param {object} event * @param {bool} forceUpdate */ onBuilderSettingsChange = (event, forceUpdate = false) => { const settings = get(event, 'detail.settings'); if (isEqual(settings, this.modules) && ! forceUpdate) { return; } // Update sticky settings. Removed nested sticky module (sticky inside another // sticky module) from the module list. modules = filterInvalidModules(cloneDeep(settings), modules); // Append saved sticky elements settings which is rendered outside of current builder // type because it won't be generated by current builder's components assign(modules, savedStickyElements); // Generate offset modules this.generateOffsetModules(); this.emit(SETTINGS_CHANGE); } /** * Get id of all modules. * * @since 4.6.0 * * @type {object} modules * * @returns {Array} */ getModulesId = modules => map(modules, module => module.id) /** * Get modules based on its rendering position; also consider its offset surrounding setting if needed. * * @since 4.6.0 * @param {string} top|bottom * @param position * @param offsetSurrounding * @param {string|bool} on|off|false When false, ignore offset surrounding value. * @returns {bool} */ getModulesByPosition = (position, offsetSurrounding = false) => filter(modules, (module, id) => { // Check offset surrounding value; if param set to `false`, ignore it. If `on`|`off`, only // pass module that has matching value const isOffsetSurrounding = ! offsetSurrounding ? true : isOrHasValue(module.offsetSurrounding, offsetSurrounding); return includes(['top_bottom', position], this.getProp(id, 'position')) && isOffsetSurrounding; }) /** * Sort modules from top to down based on offset prop. Passed module has no id or index prop so * offset which visually indicate module's position in the page will do. * * @since 4.6.0 */ sortModules = () => { const storeModules = this.modules; const modulesSize = size(storeModules); // Return modules as-is if it is less than two modules; no need to sort it if (modulesSize < 2) { return storeModules; } // There's no index whatsoever, but offset's top and left indicates module's position const sortedModules = sortBy(storeModules, [ module => module.offsets.top, module => module.offsets.left, ]); // sortBy returns array type value; remap id as object key const remappedModules = mapKeys(sortedModules, module => module.id); modules = cloneDeep(remappedModules); } /** * Set prop value. * * @since 4.6.0 * * @param {string} id Need to be unique. * @param {string} name * @param {string} value */ setProp = (id, name, value) => { // Skip updating if the id isn't exist if (! has(modules, id) || isUndefined(id)) { return; } const currentValue = this.getProp(id, name); // Skip updating prop if the value is the same if (currentValue === value) { return; } set(modules, `${id}.${name}`, value); } /** * Get prop. * * @since 4.6.0 * @param {string} id * @param {string} name * @param {mixed} defaultValue * @param returnCurrentBreakpoint * @param {bool} return * @returns {mixed} */ getProp = (id, name, defaultValue, returnCurrentBreakpoint = true) => { const value = get(modules, `${id}.${name}`, defaultValue); const isResponsive = returnCurrentBreakpoint && isObject(value) && has(value, 'desktop') && includes(this.responsiveOptions, name); return isResponsive ? get(value, get(ETScriptWindowStore, 'breakpoint', 'desktop'), defaultValue) : value; } /** * Set known elements' props. * * @since 4.6.0 */ setElementsProps = () => { forEach(elements, (settings, name) => { if (! has(settings, 'window')) { return; } if (has(settings, 'condition') && isFunction(settings.condition) && ! settings.condition()) { // Reset props if it fails on condition check this.setElementProp(name, 'exist', get(elementsDefaults, `${name}.exist`, false)); this.setElementProp(name, 'height', get(elementsDefaults, `${name}.height`, 0)); return; } const currentWindow = 'top' === this.getElementProp(name, 'window') ? top_window : window; const $element = currentWindow.jQuery(settings.selector); const hasElement = $element.length > 0 && $element.is(':visible'); if (hasElement) { this.setElementProp(name, 'exist', hasElement); this.setElementHeight(name); } }); } /** * Set known element prop value. * * @since 4.6.0 * * @param {string} id Need to be unique. * @param {string} name * @param {string} value */ setElementProp = (id, name, value) => { const currentValue = this.getElementProp(id, name); // Skip updating prop if the value is the same if (currentValue === value) { return; } set(elements, `${id}.${name}`, value); } /** * Get known element prop. * * @since 4.6.0 * * @param {string} id * @param {string} name * @param {mixed} defaultValue * * @returns {mixed} */ getElementProp = (id, name, defaultValue) => get(elements, `${id}.${name}`, defaultValue) /** * Set element height. * * @since 4.6.0 * * @param {string} name */ setElementHeight = name => { const selector = this.getElementProp(name, 'selector'); const currentWindow = 'top' === this.getElementProp(name, 'window', 'app') ? top_window : window; const $selector = currentWindow.jQuery(selector); let height = 0; forEach($selector, item => { const getHeight = this.getElementProp(name, 'getHeight', false); if (isFunction(getHeight)) { height += getHeight(); } else { height += currentWindow.jQuery(item).outerHeight(); } }); this.setElementProp(name, 'height', parseInt(height)); } /** * Generate offset modules for offset surrounding option. * * @since 4.6.0 */ generateOffsetModules = () => { // Get module's width, height, and offsets. These are needed to calculate offset module's // adjacent column adjustment. stickyElement will update this later on its initialization // This needs to be on earlier and different loop than the one below for generating offset // modules because in builder the modules need to be sorted from top to down first forEach(this.modules, (module, id) => { const $module = $(this.getProp(id, 'selector')); const moduleWidth = parseInt($module.outerWidth()); const moduleHeight = parseInt($module.outerHeight()); const moduleOffsets = getOffsets($module, moduleWidth, moduleHeight); // Only update dimension props if module isn't on sticky state if (! this.isSticky(id)) { this.setProp(id, 'width', moduleWidth); this.setProp(id, 'height', moduleHeight); this.setProp(id, 'offsets', moduleOffsets); } // Set limits const position = this.getProp(id, 'position', 'none'); const isStickyBottom = includes(['bottom', 'top_bottom'], position); const isStickyTop = includes(['top', 'top_bottom'], position); if (isStickyBottom) { const topLimit = this.getProp(id, 'topLimit'); const topLimitSettings = getLimit($module, topLimit); this.setProp(id, 'topLimitSettings', topLimitSettings); } if (isStickyTop) { const bottomLimit = this.getProp(id, 'bottomLimit'); const bottomLimitSettings = getLimit($module, bottomLimit); this.setProp(id, 'bottomLimitSettings', bottomLimitSettings); } }); // Sort modules in builder to ensure top to bottom module order for generating offset modules if (isBuilder) { this.sortModules(); } const { modules } = this; const modulesSize = size(modules); const topPositionModules = this.getModulesByPosition('top', 'on'); const topPositionModulesId = this.getModulesId(topPositionModules); const bottomPositionModules = this.getModulesByPosition('bottom', 'on'); const bottomPositionModulesId = this.getModulesId(bottomPositionModules); // Capture top/bottom offsetModules updates for later loop const offsetModulesUpdates = []; forEach(modules, (module, id) => { if (isOrHasValue(module.offsetSurrounding, 'on')) { // Top position sticky: get all module id that uses top / top_bottom position + // has its offset surrounding turn on, that are rendered BEFORE THIS sticky element if (includes(['top', 'top_bottom'], this.getProp(id, 'position'))) { const topOffsetModuleIndex = topPositionModulesId.indexOf(id); const topOffsetModule = slice(topPositionModulesId, 0, topOffsetModuleIndex); // Saves all top offset modules for reference. This still needs to be processed to // filter adjacent column later this.setProp(id, 'topOffsetModulesAll', topOffsetModule); // Mark for adjacent column filtering offsetModulesUpdates.push({ prop: 'topOffsetModules', id, }); } // Bottom position sticky: get all module id that uses bottom / top_bottom position + // has its offset surrounding turn on, that are rendered AFTER THIS sticky element if (includes(['bottom', 'top_bottom'], this.getProp(id, 'position'))) { const bottomOffsetModuleIndex = bottomPositionModulesId.indexOf(id); const bottomOffsetModules = slice(bottomPositionModulesId, (bottomOffsetModuleIndex + 1), modulesSize); // Saves all bottom offset modules for reference. This still needs to be processed to // filter adjacent column later this.setProp(id, 'bottomOffsetModulesAll', bottomOffsetModules); // Mark for adjacent column filtering offsetModulesUpdates.push({ prop: 'bottomOffsetModules', id, }); } } }); // Top / bottom offset modules adjacent column filtering if (offsetModulesUpdates.length > 0) { // Default offsets. Make sure all sides element is available const defaultOffsets = { top: 0, right: 0, bottom: 0, left: 0, }; // Proper limit settings based on current offset modules position const offsetLimitPropMaps = { topOffsetModules: 'bottomLimitSettings', bottomOffsetModules: 'topLimitSettings', }; forEach(offsetModulesUpdates, update => { // module's id const moduleId = update.id; // Need to be defined inside offsetModulesUpdates loop so each surrounding loop starts new // Will be updated on every loop so next loop has reference of what is prev modules has const prevSurroundingOffsets = { ...defaultOffsets, }; // Loop over module's top/bottom offset module ids const offsetModules = filter(this.getProp(moduleId, `${update.prop}All`), id => { // Modules that are defined at top/bottomOffsetModules prop which is positioned after // current module is referred as surrounding (modules) offset const surroundingOffsets = { ...defaultOffsets, ...this.getProp(id, 'offsets', {}), }; // Current module's offset const moduleOffsets = { ...defaultOffsets, ...this.getProp(moduleId, 'offsets'), }; // Module limit's offset const moduleLimitOffsets = this.getProp(moduleId, `${offsetLimitPropMaps[update.prop]}.offsets`); const surroundingLimitOffsets = this.getProp(id, `${offsetLimitPropMaps[update.prop]}.offsets`); // If current and surrounding modules both have limit offsets, their top and bottom needs // to be put in consideration in case they will never offset each other if (moduleLimitOffsets && surroundingLimitOffsets) { if (surroundingLimitOffsets.top < moduleLimitOffsets.top || surroundingLimitOffsets.bottom > moduleLimitOffsets.bottom) { return false; } } // If module has no limits, offset from surrounding sticky elements most likely not a // valid offset surrounding. There is a case where surrounding can be valid offset, which // is when current module on sticky state between surrounding limit top and bottom. // However this rarely happens and requires conditional offset based on current window // scroll top which might be over-engineer. Thus this is kept this way until further // confirmation with design team // @todo probably add conditional offset surrounding; confirm to design team if (! moduleLimitOffsets && surroundingLimitOffsets) { return false; } // Top Offset modules (sticky position top): modules rendered before current module // Bottom Offset module (sticky position bottom): modules rendered after current module // caveat: offset modules that are not vertically aligned with current module should not // be considered as offset modules and affecting current module's auto-added offset. // Hence this filter. Initially, all offset module should affect module's auto offset let shouldPass = true; // Surrounding module is beyond current module's right side // *********** // * current * // *********** // *************** // * surrounding * // *************** const isSurroundingBeyondCurrentRight = surroundingOffsets.left >= moduleOffsets.right; // Surrounding module is beyond current module's left side // *********** // * current * // *********** // *************** // * surrounding * // *************** const isSurroundingBeyondCurrentLeft = surroundingOffsets.right < moduleOffsets.left; // Surrounding module overlaps with current module's right side // *********** ************************ // * current * * current * // *********** OR ************************ // *************** *************** // * surrounding * * surrounding * // *************** *************** const isSurroundingOverlapsCurrent = surroundingOffsets.left > moduleOffsets.left && surroundingOffsets.right > moduleOffsets.left; // Previous surrounding module overlaps with current module's left side. // ************************ // * current * // ************************ // ******************** ****************************** // * prev surrounding * * surrounding (on this loop) * // ******************** ****************************** const isPrevSurroundingOverlapsWithCurrent = moduleOffsets.left <= prevSurroundingOffsets.right && surroundingOffsets.top < prevSurroundingOffsets.bottom; // Ignore surrounding height if previous surrounding height has affected current module's offset // See isPrevSurroundingOverlapsWithCurrent's figure above const isPrevSurroundingHasAffectCurrent = isSurroundingOverlapsCurrent && isPrevSurroundingOverlapsWithCurrent; // Ignore the surrounding's height given the following scenarios if (isSurroundingBeyondCurrentRight || isSurroundingBeyondCurrentLeft || isPrevSurroundingHasAffectCurrent) { shouldPass = false; } // Save current surrounding offsets for next surrounding offsets comparison assign(prevSurroundingOffsets, surroundingOffsets); // true: surrounding's height is considered for current module's auto offset // false: surrounding's height is ignored return shouldPass; }); // Set ${top/bottom}OffsetModules prop which will be synced to stickyElement this.setProp(moduleId, `${update.prop}Align`, offsetModules); }); } // Perform secondary offset module calculation. The above works by getting the first surrounding // sticky on the next row that affects current sticky. This works well when the row is filled // like a grid, but fail if there is row in between which is not vertically overlap. Thus, // get the closest surrounding offset sticky from last calculation, then fetch it. The idea is // the last surrounding sticky might have offset which is not vertically align / overlap to // current sticky element forEach(this.modules, (module, moduleId) => { if (module.topOffsetModulesAlign) { const lastTopOffsetModule = last(module.topOffsetModulesAlign); const pervTopOffsetModule = this.getProp(lastTopOffsetModule, 'topOffsetModules', this.getProp(lastTopOffsetModule, 'topOffsetModulesAlign', [])); this.setProp(moduleId, 'topOffsetModules', compact([ ...pervTopOffsetModule, ...[lastTopOffsetModule], ])); } if (module.bottomOffsetModulesAlign) { const firstBottomOffsetModule = head(module.bottomOffsetModulesAlign); const pervBottomOffsetModule = this.getProp(firstBottomOffsetModule, 'bottomOffsetModules', this.getProp(firstBottomOffsetModule, 'bottomOffsetModulesAlign', [])); this.setProp(moduleId, 'bottomOffsetModules', compact([ ...[firstBottomOffsetModule], ...pervBottomOffsetModule, ])); } }); } /** * Check if module with given id is on sticky state. * * @since 4.6.0 * * @param {string} id * * @returns {bool} */ isSticky = id => get(this.modules, [id, 'isSticky'], false) /** * Add listener callback for settings change event. * * @since 4.6.0 * @param callback * @param {Function} */ addSettingsChangeListener = callback => { maybeIncreaseEmitterMaxListeners(this, SETTINGS_CHANGE); this.on(SETTINGS_CHANGE, callback); return this; } /** * Remove listener callback for settings change event. * * @since 4.6.0 * @param callback * @param {Function} */ removeSettingsChangeListener = callback => { this.removeListener(SETTINGS_CHANGE, callback); maybeDecreaseEmitterMaxListeners(this, SETTINGS_CHANGE); return this; } } const stickyStoreInstance = new ETScriptStickyStore; // Register store instance as component to be exposed via global object registerFrontendComponent('stores', 'sticky', stickyStoreInstance); // Export store instance // IMPORTANT: For uniformity, import this as ETScriptStickyStore export default stickyStoreInstance;