import { r as registerInstance, h, H as Host, c as getElement } from './index-e0fb4cab.js';
import { i as isStr, g as getUrl, b as getName } from './utils-6f78da88.js';

const validateContent = (svgContent) => {
    if (svgContent && typeof document !== 'undefined') {
        const div = document.createElement('div');
        div.innerHTML = svgContent;
        // setup this way to ensure it works on our buddy IE
        for (let i = div.childNodes.length - 1; i >= 0; i--) {
            if (div.childNodes[i].nodeName.toLowerCase() !== 'svg') {
                div.removeChild(div.childNodes[i]);
            }
        }
        // must only have 1 root element
        const svgElm = div.firstElementChild;
        if (svgElm && svgElm.nodeName.toLowerCase() === 'svg') {
            const svgClass = svgElm.getAttribute('class') || '';
            svgElm.setAttribute('class', (svgClass + ' s-ion-icon').trim());
            // root element must be an svg
            // lets double check we've got valid elements
            // do not allow scripts
            if (isValid(svgElm)) {
                return div.innerHTML;
            }
        }
    }
    return '';
};
const isValid = (elm) => {
    if (elm.nodeType === 1) {
        if (elm.nodeName.toLowerCase() === 'script') {
            return false;
        }
        for (let i = 0; i < elm.attributes.length; i++) {
            const val = elm.attributes[i].value;
            if (isStr(val) && val.toLowerCase().indexOf('on') === 0) {
                return false;
            }
        }
        for (let i = 0; i < elm.childNodes.length; i++) {
            if (!isValid(elm.childNodes[i])) {
                return false;
            }
        }
    }
    return true;
};

const ioniconContent = new Map();
const requests = new Map();
const getSvgContent = (url) => {
    // see if we already have a request for this url
    let req = requests.get(url);
    if (!req) {
        if (typeof fetch !== 'undefined') {
            // we don't already have a request
            req = fetch(url).then(rsp => {
                if (rsp.ok) {
                    return rsp.text().then(svgContent => {
                        ioniconContent.set(url, validateContent(svgContent));
                    });
                }
                ioniconContent.set(url, '');
            });
            // cache for the same requests
            requests.set(url, req);
        }
        else {
            // set to empty for ssr scenarios and resolve promise
            ioniconContent.set(url, '');
            return Promise.resolve();
        }
    }
    return req;
};

const iconCss = ":host{display:inline-block;width:1em;height:1em;contain:strict;fill:currentColor;-webkit-box-sizing:content-box !important;box-sizing:content-box !important}:host .ionicon{stroke:currentColor}.ionicon-fill-none{fill:none}.ionicon-stroke-width{stroke-width:32px;stroke-width:var(--ionicon-stroke-width, 32px)}.icon-inner,.ionicon,svg{display:block;height:100%;width:100%}:host(.flip-rtl) .icon-inner{-webkit-transform:scaleX(-1);transform:scaleX(-1)}:host(.icon-small){font-size:18px !important}:host(.icon-large){font-size:32px !important}:host(.ion-color){color:var(--ion-color-base) !important}:host(.ion-color-primary){--ion-color-base:var(--ion-color-primary, #3880ff)}:host(.ion-color-secondary){--ion-color-base:var(--ion-color-secondary, #0cd1e8)}:host(.ion-color-tertiary){--ion-color-base:var(--ion-color-tertiary, #f4a942)}:host(.ion-color-success){--ion-color-base:var(--ion-color-success, #10dc60)}:host(.ion-color-warning){--ion-color-base:var(--ion-color-warning, #ffce00)}:host(.ion-color-danger){--ion-color-base:var(--ion-color-danger, #f14141)}:host(.ion-color-light){--ion-color-base:var(--ion-color-light, #f4f5f8)}:host(.ion-color-medium){--ion-color-base:var(--ion-color-medium, #989aa2)}:host(.ion-color-dark){--ion-color-base:var(--ion-color-dark, #222428)}";

const Icon = class {
    constructor(hostRef) {
        registerInstance(this, hostRef);
        this.isVisible = false;
        /**
         * The mode determines which platform styles to use.
         */
        this.mode = getIonMode();
        /**
         * If enabled, ion-icon will be loaded lazily when it's visible in the viewport.
         * Default, `false`.
         */
        this.lazy = false;
    }
    connectedCallback() {
        // purposely do not return the promise here because loading
        // the svg file should not hold up loading the app
        // only load the svg if it's visible
        this.waitUntilVisible(this.el, '50px', () => {
            this.isVisible = true;
            this.loadIcon();
        });
    }
    disconnectedCallback() {
        if (this.io) {
            this.io.disconnect();
            this.io = undefined;
        }
    }
    waitUntilVisible(el, rootMargin, cb) {
        if ( this.lazy && typeof window !== 'undefined' && window.IntersectionObserver) {
            const io = this.io = new window.IntersectionObserver((data) => {
                if (data[0].isIntersecting) {
                    io.disconnect();
                    this.io = undefined;
                    cb();
                }
            }, { rootMargin });
            io.observe(el);
        }
        else {
            // browser doesn't support IntersectionObserver
            // so just fallback to always show it
            cb();
        }
    }
    loadIcon() {
        if ( this.isVisible) {
            const url = getUrl(this);
            if (url) {
                if (ioniconContent.has(url)) {
                    // sync if it's already loaded
                    this.svgContent = ioniconContent.get(url);
                }
                else {
                    // async if it hasn't been loaded
                    getSvgContent(url).then(() => this.svgContent = ioniconContent.get(url));
                }
            }
        }
        if (!this.ariaLabel) {
            const label = getName(this.name, this.icon, this.mode, this.ios, this.md);
            // user did not provide a label
            // come up with the label based on the icon name
            if (label) {
                this.ariaLabel = label.replace(/\-/g, ' ');
            }
        }
    }
    render() {
        const mode = this.mode || 'md';
        const flipRtl = this.flipRtl || (this.ariaLabel && (this.ariaLabel.indexOf('arrow') > -1 || this.ariaLabel.indexOf('chevron') > -1) && this.flipRtl !== false);
        return (h(Host, { role: "img", class: Object.assign(Object.assign({ [mode]: true }, createColorClasses(this.color)), { [`icon-${this.size}`]: !!this.size, 'flip-rtl': !!flipRtl && this.el.ownerDocument.dir === 'rtl' }) }, (( this.svgContent)
            ? h("div", { class: "icon-inner", innerHTML: this.svgContent })
            : h("div", { class: "icon-inner" }))));
    }
    static get assetsDirs() { return ["svg"]; }
    get el() { return getElement(this); }
    static get watchers() { return {
        "name": ["loadIcon"],
        "src": ["loadIcon"],
        "icon": ["loadIcon"]
    }; }
};
const getIonMode = () => ( typeof document !== 'undefined' && document.documentElement.getAttribute('mode')) || 'md';
const createColorClasses = (color) => {
    return (color) ? {
        'ion-color': true,
        [`ion-color-${color}`]: true
    } : null;
};
Icon.style = iconCss;

export { Icon as ion_icon };
