@exadel/esl/modules/esl-panel-group/core/esl-panel-group.js

Exadel Smart Library (ESL) is the lightweight custom elements library that provide a set of super-flexible components

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    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var ESLPanelGroup_1;
import { ExportNs } from '../../esl-utils/environment/export-ns';
import { defined } from '../../esl-utils/misc/object/utils';
import { ESLBaseElement } from '../../esl-base-element/core';
import { afterNextRender } from '../../esl-utils/async/raf';
import { debounce } from '../../esl-utils/async/debounce';
import { decorate, memoize, attr, boolAttr, jsonAttr, prop, listen } from '../../esl-utils/decorators';
import { format } from '../../esl-utils/misc/format';
import { CSSClassUtils } from '../../esl-utils/dom/class';
import { ESLMediaQuery, ESLMediaRuleList } from '../../esl-media-query/core';
import { ESLPanel } from '../../esl-panel/core';
/** Converts special 'all' value to positive infinity */
const parseCount = (value) => value === 'all' ? Number.POSITIVE_INFINITY : parseInt(value, 10);
/**
 * ESLPanelGroup component
 * @author Julia Murashko, Anastasia Lesun, Alexey Stsefanovich (ala'n)
 *
 * ESLPanelGroup is a custom element that is used as a container for a group of {@link ESLPanel}s
 */
let ESLPanelGroup = ESLPanelGroup_1 = class ESLPanelGroup extends ESLBaseElement {
    constructor() {
        super(...arguments);
        /** Height of previous active panel */
        this._previousHeight = 0;
    }
    connectedCallback() {
        ESLPanel.registered.then(() => {
            super.connectedCallback();
            this.refresh();
        });
    }
    attributeChangedCallback(attrName, oldVal, newVal) {
        if (!this.connected || oldVal === newVal)
            return;
        if (attrName === 'mode' || attrName === 'min-open-items' || attrName === 'max-open-items') {
            this.$$off(this._onConfigChange);
            memoize.clear(this, 'modeRules');
            memoize.clear(this, 'minValueRules');
            memoize.clear(this, 'maxValueRules');
            this.$$on(this._onConfigChange);
            this.refresh();
        }
        if (attrName === 'refresh-strategy') {
            memoize.clear(this, 'refreshRules');
        }
    }
    /** Updates element state according to current mode */
    refresh() {
        const prevMode = this.getAttribute('current-mode');
        const currentMode = this.currentMode;
        this.setAttribute('current-mode', currentMode);
        this.updateModeCls();
        this.reset();
        this.updateMarkers();
        if (prevMode !== currentMode)
            this.$$fire(this.MODE_CHANGE_EVENT, { detail: { prevMode, currentMode } });
    }
    updateMarkers() {
        this.$$attr('has-opened', this.$activePanels.length > 0);
    }
    /** Updates mode class marker */
    updateModeCls() {
        const { modeCls, currentMode } = this;
        if (!modeCls)
            return;
        const $target = this.$$find(this.modeClsTarget);
        if (!$target)
            return;
        ESLPanelGroup_1.supportedModes.forEach((mode) => {
            const className = format(modeCls, { mode });
            $target.classList.toggle(className, currentMode === mode);
        });
    }
    /** @returns ESLMediaRuleList instance of the mode mapping */
    get modeRules() {
        return ESLMediaRuleList.parseQuery(this.mode);
    }
    /** @returns ESLMediaRuleList instance of the min-open-items mapping */
    get minValueRules() {
        return ESLMediaRuleList.parseQuery(this.minOpenItems, parseCount);
    }
    /** @returns ESLMediaRuleList instance of the max-open-items mapping */
    get maxValueRules() {
        return ESLMediaRuleList.parseQuery(this.maxOpenItems, parseCount);
    }
    /** @returns ESLMediaRuleList instance of the refresh-strategy mapping */
    get refreshRules() {
        return ESLMediaRuleList.parseQuery(this.refreshStrategy);
    }
    /** @returns current mode */
    get currentMode() {
        return this.modeRules.activeValue || '';
    }
    /** @returns current value of min-open-items */
    get currentMinItems() {
        const min = 0;
        const val = defined(this.minValueRules.activeValue, 1);
        const max = this.currentMode === 'tabs' ? 1 : this.$panels.length;
        return Math.min(max, Math.max(min, val)); // minmax
    }
    /** @returns current value of max-open-items */
    get currentMaxItems() {
        const min = this.currentMinItems;
        const val = defined(this.maxValueRules.activeValue, 1);
        const max = this.currentMode === 'tabs' ? 1 : this.$panels.length;
        return Math.min(max, Math.max(min, val)); // minmax
    }
    /** @returns panels that are processed by the current panel group */
    get $panels() {
        const els = Array.from(this.querySelectorAll(this.panelSel));
        return els.filter((el) => this.includesPanel(el));
    }
    /** @returns panels that are active */
    get $activePanels() {
        return this.$panels.filter((el) => el.open);
    }
    /** @returns panels that was initially opened */
    get $initialPanels() {
        return this.$panels.filter((el) => el.initiallyOpened);
    }
    /** @returns panels that requested to be opened on refresh */
    get $resetStatePanels() {
        switch (this.refreshRules.activeValue) {
            case 'close': return [];
            case 'open': return this.$panels;
            case 'initial': return this.$initialPanels;
            default: return this.$activePanels;
        }
    }
    /** @returns whether the collapse/expand animation should be handheld by the breakpoints */
    get shouldAnimate() {
        return !ESLMediaQuery.for(this.noAnimate).matches;
    }
    /** @returns action params config that's used (inherited) by controlled {@link ESLPanel}s */
    get panelConfig() {
        return {
            capturedBy: this.currentMode === 'tabs' ? this : undefined,
            noAnimate: !this.shouldAnimate || (this.currentMode === 'tabs')
        };
    }
    /** @returns merged panel action params for show/hide requests from the group */
    mergeActionParams(...params) {
        return Object.assign({ initiator: 'group', activator: this }, ...params);
    }
    /** Condition-guard to check if the passed target is a Panel that should be controlled by the Group */
    includesPanel(target) {
        if (!(target instanceof ESLPanel))
            return false;
        return target.$group === this;
    }
    /** Shows all panels besides excluded ones */
    showAll(excluded = [], params = {}) {
        this.$panels.forEach((el) => !excluded.includes(el) && el.show(this.mergeActionParams(params)));
    }
    /** Hides all active panels besides excluded ones */
    hideAll(excluded = [], params = {}) {
        this.$activePanels.forEach((el) => !excluded.includes(el) && el.hide(this.mergeActionParams(params)));
    }
    /** Resets to default state applicable to the current panel group configuration */
    reset() {
        // $activePanels - collection of items to open (ideally; without normalization)
        const $activePanels = this.$resetStatePanels;
        // $orderedPanels = $activePanels U ($panels / $activePanels) - the list of ordered panels
        const $orderedPanels = $activePanels.concat(this.$panels.filter((item) => !$activePanels.includes(item)));
        // we use current open active panels count but normalized in range of minmax
        const activeCount = Math.min(this.currentMaxItems, Math.max($activePanels.length, this.currentMinItems));
        const params = this.mergeActionParams(this.transformParams);
        $orderedPanels.forEach((panel, index) => panel.toggle(index < activeCount, params));
    }
    /** Animates the height of the component */
    onAnimate(from, to) {
        // overrides initial value if animation is currently in progress
        if (from < 0 || this.style.height && this.style.height !== 'auto') {
            from = this.clientHeight;
        }
        // sets the initial height
        this.style.height = `${from}px`;
        // makes sure browser realized the height change
        afterNextRender(() => {
            this.style.height = `${to}px`;
            this.fallbackAnimate();
        });
    }
    /** Checks if transition happens and runs afterAnimate step if transition is not presented */
    fallbackAnimate() {
        afterNextRender(() => {
            const distance = parseFloat(this.style.height) - this.clientHeight;
            if (Math.abs(distance) <= 1)
                this.afterAnimate();
        });
    }
    /** Pre-processing animation action */
    beforeAnimate() {
        this.$$attr('animating', true);
        CSSClassUtils.add(this, this.animationClass);
    }
    /** Post-processing animation action */
    afterAnimate(silent) {
        this.style.removeProperty('height');
        CSSClassUtils.remove(this, this.animationClass);
        this.$$attr('animating', false);
        if (silent)
            return;
        this.$$fire(this.AFTER_ANIMATE_EVENT, { bubbles: false });
    }
    /** Process {@link ESLPanel} pre-show event */
    _onBeforeShow(e) {
        var _a, _b, _c;
        const panel = e.target;
        if (!this.includesPanel(panel))
            return;
        const max = this.currentMaxItems;
        const params = this.mergeActionParams({ event: e });
        const balanceMarker = ((_c = (_b = (_a = e.detail) === null || _a === void 0 ? void 0 : _a.params) === null || _b === void 0 ? void 0 : _b.event) === null || _c === void 0 ? void 0 : _c.type) !== 'esl:before:hide';
        // all currently active panels, except the one that requested to be open
        const $activePanels = this.$activePanels.filter((el) => el !== panel);
        // overflow = pretended to be active (current active + balanceMarker (1 if nothing hides)) - limit
        const overflow = Math.max(0, $activePanels.length + Number(balanceMarker) - max);
        // close all extra active panels (not includes requested one)
        $activePanels.slice(0, overflow).forEach((el) => el.hide(params));
        if (max <= 0)
            return e.preventDefault();
        this._previousHeight = this.clientHeight;
    }
    /** Process {@link ESLPanel} show event */
    _onStateChanged(e) {
        const panel = e.target;
        if (!this.includesPanel(panel))
            return;
        this.updateMarkers();
        if (this.currentMode !== 'tabs')
            return;
        const targetHeight = panel.open ? panel.initialHeight : 0;
        this.beforeAnimate();
        if (this.shouldAnimate) {
            this.onAnimate(this._previousHeight, targetHeight);
        }
        else {
            afterNextRender(() => this.afterAnimate(true));
        }
    }
    /** Process {@link ESLPanel} pre-hide event */
    _onBeforeHide(e) {
        var _a, _b;
        const { target: panel, detail } = e;
        if (!this.includesPanel(panel))
            return;
        const min = this.currentMinItems;
        // checks if the hide event was produced by the show event
        const balanceMarker = ((_b = (_a = detail === null || detail === void 0 ? void 0 : detail.params) === null || _a === void 0 ? void 0 : _a.event) === null || _b === void 0 ? void 0 : _b.type) === 'esl:before:show';
        // activePanels = currentActivePanels - 1 (hide) + 1 if the event produced by 'before:show'
        const activeNumber = this.$activePanels.length - 1 + Number(balanceMarker);
        if (activeNumber < min) {
            const $firstInactive = this.$panels.find(($panel) => !$panel.open);
            if (min === 1 || !$firstInactive)
                return e.preventDefault();
            const params = this.mergeActionParams({ event: e });
            $firstInactive.show(params);
        }
        this._previousHeight = this.clientHeight;
    }
    /** Catches CSS transition end event to start post-animate processing */
    _onTransitionEnd(e) {
        if (!e || (e.propertyName === 'height' && e.target === this)) {
            this.afterAnimate();
        }
    }
    /** Handles configuration change */
    _onConfigChange() {
        this.refresh();
    }
};
ESLPanelGroup.is = 'esl-panel-group';
ESLPanelGroup.observedAttributes = ['mode', 'refresh-strategy', 'min-open-items', 'max-open-items'];
/** List of supported modes */
ESLPanelGroup.supportedModes = ['accordion', 'tabs'];
__decorate([
    prop('esl:change:mode')
], ESLPanelGroup.prototype, "MODE_CHANGE_EVENT", void 0);
__decorate([
    prop('esl:after:animate')
], ESLPanelGroup.prototype, "AFTER_ANIMATE_EVENT", void 0);
__decorate([
    attr({ defaultValue: ESLPanel.is })
], ESLPanelGroup.prototype, "panelSel", void 0);
__decorate([
    attr({ defaultValue: 'accordion' })
], ESLPanelGroup.prototype, "mode", void 0);
__decorate([
    attr({ defaultValue: 'esl-{mode}-view' })
], ESLPanelGroup.prototype, "modeCls", void 0);
__decorate([
    attr({ defaultValue: '' })
], ESLPanelGroup.prototype, "modeClsTarget", void 0);
__decorate([
    attr({ defaultValue: 'not all' })
], ESLPanelGroup.prototype, "noAnimate", void 0);
__decorate([
    attr({ defaultValue: 'animate' })
], ESLPanelGroup.prototype, "animationClass", void 0);
__decorate([
    attr({ defaultValue: '1' })
], ESLPanelGroup.prototype, "minOpenItems", void 0);
__decorate([
    attr({ defaultValue: '1' })
], ESLPanelGroup.prototype, "maxOpenItems", void 0);
__decorate([
    attr({ defaultValue: 'last' })
], ESLPanelGroup.prototype, "refreshStrategy", void 0);
__decorate([
    jsonAttr({ defaultValue: { noAnimate: true } })
], ESLPanelGroup.prototype, "transformParams", void 0);
__decorate([
    boolAttr({ readonly: true })
], ESLPanelGroup.prototype, "hasOpened", void 0);
__decorate([
    boolAttr({ readonly: true })
], ESLPanelGroup.prototype, "animating", void 0);
__decorate([
    memoize()
], ESLPanelGroup.prototype, "modeRules", null);
__decorate([
    memoize()
], ESLPanelGroup.prototype, "minValueRules", null);
__decorate([
    memoize()
], ESLPanelGroup.prototype, "maxValueRules", null);
__decorate([
    memoize()
], ESLPanelGroup.prototype, "refreshRules", null);
__decorate([
    listen('esl:before:show')
], ESLPanelGroup.prototype, "_onBeforeShow", null);
__decorate([
    listen('esl:show esl:hide')
], ESLPanelGroup.prototype, "_onStateChanged", null);
__decorate([
    listen('esl:before:hide')
], ESLPanelGroup.prototype, "_onBeforeHide", null);
__decorate([
    listen('transitionend')
], ESLPanelGroup.prototype, "_onTransitionEnd", null);
__decorate([
    listen({
        event: 'change',
        target: (group) => [group.modeRules, group.minValueRules, group.maxValueRules]
    }),
    decorate(debounce, 0)
], ESLPanelGroup.prototype, "_onConfigChange", null);
ESLPanelGroup = ESLPanelGroup_1 = __decorate([
    ExportNs('PanelGroup')
], ESLPanelGroup);
export { ESLPanelGroup };