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import { getName, getSrc, isValid } from './utils';
export class Icon {
constructor() {
this.isVisible = false;
this.lazy = false;
}
componentWillLoad() {
this.waitUntilVisible(this.el, '50px', () => {
this.isVisible = true;
this.loadIcon();
});
}
componentDidUnload() {
if (this.io) {
this.io.disconnect();
this.io = undefined;
}
}
waitUntilVisible(el, rootMargin, cb) {
if (this.lazy && this.win && this.win.IntersectionObserver) {
const io = this.io = new this.win.IntersectionObserver((data) => {
if (data[0].isIntersecting) {
io.disconnect();
this.io = undefined;
cb();
}
}, { rootMargin });
io.observe(el);
}
else {
cb();
}
}
loadIcon() {
if (!this.isServer && this.isVisible) {
const url = this.getUrl();
if (url) {
getSvgContent(this.doc, url, 's-ion-icon')
.then(svgContent => this.svgContent = svgContent);
}
}
if (!this.ariaLabel) {
const name = getName(this.name, this.mode, this.ios, this.md);
if (name) {
this.ariaLabel = name
.replace('ios-', '')
.replace('md-', '')
.replace(/\-/g, ' ');
}
}
}
getUrl() {
let url = getSrc(this.src);
if (url) {
return url;
}
url = getName(this.name, this.mode, this.ios, this.md);
if (url) {
return this.getNamedUrl(url);
}
url = getSrc(this.icon);
if (url) {
return url;
}
url = getName(this.icon, this.mode, this.ios, this.md);
if (url) {
return this.getNamedUrl(url);
}
return null;
}
getNamedUrl(name) {
return `${this.resourcesUrl}svg/${name}.svg`;
}
hostData() {
return {
'role': 'img',
class: Object.assign({}, createColorClasses(this.color), { [`icon-${this.size}`]: !!this.size })
};
}
render() {
if (!this.isServer && this.svgContent) {
return h("div", { class: "icon-inner", innerHTML: this.svgContent });
}
return h("div", { class: "icon-inner" });
}
static get is() { return "ion-icon"; }
static get encapsulation() { return "shadow"; }
static get properties() { return {
"ariaLabel": {
"type": String,
"attr": "aria-label",
"reflectToAttr": true,
"mutable": true
},
"color": {
"type": String,
"attr": "color"
},
"doc": {
"context": "document"
},
"el": {
"elementRef": true
},
"icon": {
"type": String,
"attr": "icon",
"watchCallbacks": ["loadIcon"]
},
"ios": {
"type": String,
"attr": "ios"
},
"isServer": {
"context": "isServer"
},
"isVisible": {
"state": true
},
"lazy": {
"type": Boolean,
"attr": "lazy"
},
"md": {
"type": String,
"attr": "md"
},
"mode": {
"type": String,
"attr": "mode"
},
"name": {
"type": String,
"attr": "name",
"watchCallbacks": ["loadIcon"]
},
"resourcesUrl": {
"context": "resourcesUrl"
},
"size": {
"type": String,
"attr": "size"
},
"src": {
"type": String,
"attr": "src",
"watchCallbacks": ["loadIcon"]
},
"svgContent": {
"state": true
},
"win": {
"context": "window"
}
}; }
static get style() { return "/**style-placeholder:ion-icon:**/"; }
}
const requests = new Map();
function getSvgContent(doc, url, scopedId) {
let req = requests.get(url);
if (!req) {
req = fetch(url, { cache: 'force-cache' }).then(rsp => {
if (rsp.ok) {
return rsp.text();
}
return Promise.resolve(null);
}).then(svgContent => validateContent(doc, svgContent, scopedId));
requests.set(url, req);
}
return req;
}
function validateContent(document, svgContent, scopeId) {
if (svgContent) {
const frag = document.createDocumentFragment();
const div = document.createElement('div');
div.innerHTML = svgContent;
frag.appendChild(div);
for (let i = div.childNodes.length - 1; i >= 0; i--) {
if (div.childNodes[i].nodeName.toLowerCase() !== 'svg') {
div.removeChild(div.childNodes[i]);
}
}
const svgElm = div.firstElementChild;
if (svgElm && svgElm.nodeName.toLowerCase() === 'svg') {
if (scopeId) {
svgElm.setAttribute('class', scopeId);
}
if (isValid(svgElm)) {
return div.innerHTML;
}
}
}
return '';
}
function createColorClasses(color) {
return (color) ? {
'ion-color': true,
[`ion-color-${color}`]: true
} : null;
}