@rxdi/ui-kit
Version:
UI Components for building graphql-server website
78 lines • 2.94 kB
JavaScript
;
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.MarkdownParserMenuProvider = void 0;
const core_1 = require("@rxdi/core");
const rxjs_1 = require("rxjs");
let MarkdownParserMenuProvider = class MarkdownParserMenuProvider {
constructor() {
this.menu = new rxjs_1.BehaviorSubject([]);
this.scrollTopOffset = 100;
}
setItems(items) {
this.menu.next(items);
}
clearMenu() {
this.menu.next([]);
}
addItem(item) {
this.menu.next([...this.menu.getValue(), item]);
}
lookupHeadings(contentReference) {
if (!contentReference) {
return;
}
const headings = contentReference.querySelectorAll('h3, h4');
const removeAnchor = (text) => {
const anchorId = text && text.indexOf('#');
return anchorId >= 0 ? text.slice(0, anchorId) : text;
};
const heads = Array.from(headings).map((item) => ({
offsetTop: item.offsetTop,
textContent: removeAnchor(item.textContent),
elementRef: item
}));
if (heads && heads.length) {
const index = this.findCurrentHeading(headings);
this.setItems([
...heads.map(e => ({
elementRef: e.elementRef,
title: e.textContent
}))
]);
if (index > 0) {
this.navigateToAnchor(heads[index].elementRef);
}
}
}
findCurrentHeading(headings) {
const marginOffset = 15;
for (let i = 0; i < headings.length; i++) {
if (headings.length - 1 === i) {
return (this.activeId = i);
}
else if (headings[i + 1].offsetTop >=
window.pageYOffset + this.scrollTopOffset + marginOffset) {
return (this.activeId = i);
}
}
}
navigateToAnchor(elementRef) {
if (elementRef) {
window.scroll({
top: elementRef.offsetTop - 100,
behavior: 'smooth'
});
}
}
};
MarkdownParserMenuProvider = __decorate([
(0, core_1.Injectable)()
], MarkdownParserMenuProvider);
exports.MarkdownParserMenuProvider = MarkdownParserMenuProvider;
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