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https://github.com/BookStackApp/BookStack.git
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5404f22bf9
For #781
213 lines
7.8 KiB
JavaScript
213 lines
7.8 KiB
JavaScript
import Clipboard from "clipboard/dist/clipboard.min";
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import Code from "../services/code";
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import * as DOM from "../services/dom";
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import {scrollAndHighlightElement} from "../services/util";
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class PageDisplay {
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constructor(elem) {
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this.elem = elem;
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this.pageId = elem.getAttribute('page-display');
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Code.highlight();
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this.setupPointer();
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this.setupNavHighlighting();
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this.setupDetailsCodeBlockRefresh();
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// Check the hash on load
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if (window.location.hash) {
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let text = window.location.hash.replace(/\%20/g, ' ').substr(1);
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this.goToText(text);
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}
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// Sidebar page nav click event
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const sidebarPageNav = document.querySelector('.sidebar-page-nav');
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if (sidebarPageNav) {
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DOM.onChildEvent(sidebarPageNav, 'a', 'click', (event, child) => {
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event.preventDefault();
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window.components['tri-layout'][0].showContent();
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const contentId = child.getAttribute('href').substr(1);
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this.goToText(contentId);
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window.history.pushState(null, null, '#' + contentId);
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});
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}
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}
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goToText(text) {
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const idElem = document.getElementById(text);
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DOM.forEach('.page-content [data-highlighted]', elem => {
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elem.removeAttribute('data-highlighted');
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elem.style.backgroundColor = null;
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});
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if (idElem !== null) {
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scrollAndHighlightElement(idElem);
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} else {
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const textElem = DOM.findText('.page-content > div > *', text);
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if (textElem) {
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scrollAndHighlightElement(textElem);
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}
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}
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}
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setupPointer() {
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let pointer = document.getElementById('pointer');
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if (!pointer) {
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return;
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}
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// Set up pointer
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pointer = pointer.parentNode.removeChild(pointer);
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const pointerInner = pointer.querySelector('div.pointer');
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// Instance variables
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let pointerShowing = false;
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let isSelection = false;
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let pointerModeLink = true;
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let pointerSectionId = '';
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// Select all contents on input click
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DOM.onChildEvent(pointer, 'input', 'click', (event, input) => {
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input.select();
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event.stopPropagation();
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});
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// Prevent closing pointer when clicked or focused
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DOM.onEvents(pointer, ['click', 'focus'], event => {
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event.stopPropagation();
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});
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// Pointer mode toggle
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DOM.onChildEvent(pointer, 'span.icon', 'click', (event, icon) => {
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event.stopPropagation();
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pointerModeLink = !pointerModeLink;
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icon.querySelector('[data-icon="include"]').style.display = (!pointerModeLink) ? 'inline' : 'none';
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icon.querySelector('[data-icon="link"]').style.display = (pointerModeLink) ? 'inline' : 'none';
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updatePointerContent();
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});
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// Set up clipboard
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new Clipboard(pointer.querySelector('button'));
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// Hide pointer when clicking away
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DOM.onEvents(document.body, ['click', 'focus'], event => {
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if (!pointerShowing || isSelection) return;
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pointer = pointer.parentElement.removeChild(pointer);
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pointerShowing = false;
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});
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let updatePointerContent = (element) => {
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let inputText = pointerModeLink ? window.baseUrl(`/link/${this.pageId}#${pointerSectionId}`) : `{{@${this.pageId}#${pointerSectionId}}}`;
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if (pointerModeLink && !inputText.startsWith('http')) {
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inputText = window.location.protocol + "//" + window.location.host + inputText;
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}
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pointer.querySelector('input').value = inputText;
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// Update anchor if present
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const editAnchor = pointer.querySelector('#pointer-edit');
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if (editAnchor && element) {
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const editHref = editAnchor.dataset.editHref;
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const elementId = element.id;
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// get the first 50 characters.
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const queryContent = element.textContent && element.textContent.substring(0, 50);
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editAnchor.href = `${editHref}?content-id=${elementId}&content-text=${encodeURIComponent(queryContent)}`;
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}
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};
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// Show pointer when selecting a single block of tagged content
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DOM.forEach('.page-content [id^="bkmrk"]', bookMarkElem => {
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DOM.onEvents(bookMarkElem, ['mouseup', 'keyup'], event => {
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event.stopPropagation();
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let selection = window.getSelection();
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if (selection.toString().length === 0) return;
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// Show pointer and set link
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pointerSectionId = bookMarkElem.id;
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updatePointerContent(bookMarkElem);
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bookMarkElem.parentNode.insertBefore(pointer, bookMarkElem);
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pointer.style.display = 'block';
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pointerShowing = true;
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isSelection = true;
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// Set pointer to sit near mouse-up position
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requestAnimationFrame(() => {
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const bookMarkBounds = bookMarkElem.getBoundingClientRect();
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let pointerLeftOffset = (event.pageX - bookMarkBounds.left - 164);
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if (pointerLeftOffset < 0) {
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pointerLeftOffset = 0
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}
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const pointerLeftOffsetPercent = (pointerLeftOffset / bookMarkBounds.width) * 100;
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pointerInner.style.left = pointerLeftOffsetPercent + '%';
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setTimeout(() => {
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isSelection = false;
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}, 100);
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});
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});
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});
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}
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setupNavHighlighting() {
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// Check if support is present for IntersectionObserver
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if (!('IntersectionObserver' in window) ||
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!('IntersectionObserverEntry' in window) ||
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!('intersectionRatio' in window.IntersectionObserverEntry.prototype)) {
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return;
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}
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let pageNav = document.querySelector('.sidebar-page-nav');
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// fetch all the headings.
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let headings = document.querySelector('.page-content').querySelectorAll('h1, h2, h3, h4, h5, h6');
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// if headings are present, add observers.
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if (headings.length > 0 && pageNav !== null) {
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addNavObserver(headings);
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}
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function addNavObserver(headings) {
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// Setup the intersection observer.
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let intersectOpts = {
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rootMargin: '0px 0px 0px 0px',
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threshold: 1.0
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};
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let pageNavObserver = new IntersectionObserver(headingVisibilityChange, intersectOpts);
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// observe each heading
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for (let heading of headings) {
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pageNavObserver.observe(heading);
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}
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}
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function headingVisibilityChange(entries, observer) {
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for (let entry of entries) {
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let isVisible = (entry.intersectionRatio === 1);
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toggleAnchorHighlighting(entry.target.id, isVisible);
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}
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}
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function toggleAnchorHighlighting(elementId, shouldHighlight) {
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DOM.forEach('a[href="#' + elementId + '"]', anchor => {
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anchor.closest('li').classList.toggle('current-heading', shouldHighlight);
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});
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}
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}
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setupDetailsCodeBlockRefresh() {
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const onToggle = event => {
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const codeMirrors = [...event.target.querySelectorAll('.CodeMirror')];
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codeMirrors.forEach(cm => cm.CodeMirror && cm.CodeMirror.refresh());
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};
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const details = [...this.elem.querySelectorAll('details')];
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details.forEach(detail => detail.addEventListener('toggle', onToggle));
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}
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}
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export default PageDisplay;
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