mirror of
https://github.com/BookStackApp/BookStack.git
synced 2024-11-29 04:10:09 +08:00
266 lines
9.8 KiB
JavaScript
266 lines
9.8 KiB
JavaScript
import Clipboard from "clipboard";
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import Code from "../services/code";
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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.setupStickySidebar();
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this.setupNavHighlighting();
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this.setupEditOnHeader();
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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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$('.sidebar-page-nav').on('click', 'a', event => {
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goToText(event.target.getAttribute('href').substr(1));
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});
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}
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goToText(text) {
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let idElem = document.getElementById(text);
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$('.page-content [data-highlighted]').attr('data-highlighted', '').css('background-color', '');
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if (idElem !== null) {
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window.scrollAndHighlight(idElem);
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} else {
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$('.page-content').find(':contains("' + text + '")').smoothScrollTo();
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}
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}
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setupPointer() {
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if (document.getElementById('pointer') === null) return;
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// Set up pointer
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let $pointer = $('#pointer').detach();
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let pointerShowing = false;
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let $pointerInner = $pointer.children('div.pointer').first();
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let isSelection = false;
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let pointerModeLink = true;
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let pointerSectionId = '';
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// Select all contents on input click
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$pointer.on('click', 'input', event => {
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$(this).select();
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event.stopPropagation();
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});
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$pointer.on('click focus', event => {
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event.stopPropagation();
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});
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// Pointer mode toggle
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$pointer.on('click', 'span.icon', event => {
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event.stopPropagation();
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let $icon = $(event.currentTarget);
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pointerModeLink = !pointerModeLink;
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$icon.find('[data-icon="include"]').toggle(!pointerModeLink);
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$icon.find('[data-icon="link"]').toggle(pointerModeLink);
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updatePointerContent();
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});
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// Set up clipboard
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let clipboard = new Clipboard($pointer[0].querySelector('button'));
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// Hide pointer when clicking away
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$(document.body).find('*').on('click focus', event => {
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if (!pointerShowing || isSelection) return;
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$pointer.detach();
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pointerShowing = false;
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});
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let updatePointerContent = ($elem) => {
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let inputText = pointerModeLink ? window.baseUrl(`/link/${this.pageId}#${pointerSectionId}`) : `{{@${this.pageId}#${pointerSectionId}}}`;
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if (pointerModeLink && inputText.indexOf('http') !== 0) inputText = window.location.protocol + "//" + window.location.host + inputText;
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$pointer.find('input').val(inputText);
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// update anchor if present
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const $editAnchor = $pointer.find('#pointer-edit');
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if ($editAnchor.length !== 0 && $elem) {
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const editHref = $editAnchor.data('editHref');
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const element = $elem[0];
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const elementId = element.id;
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// get the first 50 characters.
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let queryContent = element.textContent && element.textContent.substring(0, 50);
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$editAnchor[0].href = `${editHref}?content-id=${elementId}&content-text=${encodeURIComponent(queryContent)}`;
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}
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};
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// Show pointer when selecting a single block of tagged content
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$('.page-content [id^="bkmrk"]').on('mouseup keyup', function (e) {
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e.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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let $elem = $(this);
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pointerSectionId = $elem.attr('id');
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updatePointerContent($elem);
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$elem.before($pointer);
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$pointer.show();
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pointerShowing = true;
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// Set pointer to sit near mouse-up position
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let pointerLeftOffset = (e.pageX - $elem.offset().left - ($pointerInner.width() / 2));
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if (pointerLeftOffset < 0) pointerLeftOffset = 0;
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let pointerLeftOffsetPercent = (pointerLeftOffset / $elem.width()) * 100;
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$pointerInner.css('left', pointerLeftOffsetPercent + '%');
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isSelection = true;
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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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setupStickySidebar() {
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// Make the sidebar stick in view on scroll
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let $window = $(window);
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let $sidebar = $("#sidebar .scroll-body");
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let $bookTreeParent = $sidebar.parent();
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// Check the page is scrollable and the content is taller than the tree
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let pageScrollable = ($(document).height() > $window.height()) && ($sidebar.height() < $('.page-content').height());
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// Get current tree's width and header height
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let headerHeight = $("#header").height() + $(".toolbar").height();
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let isFixed = $window.scrollTop() > headerHeight;
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// Fix the tree as a sidebar
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function stickTree() {
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$sidebar.width($bookTreeParent.width() + 15);
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$sidebar.addClass("fixed");
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isFixed = true;
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}
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// Un-fix the tree back into position
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function unstickTree() {
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$sidebar.css('width', 'auto');
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$sidebar.removeClass("fixed");
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isFixed = false;
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}
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// Checks if the tree stickiness state should change
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function checkTreeStickiness(skipCheck) {
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let shouldBeFixed = $window.scrollTop() > headerHeight;
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if (shouldBeFixed && (!isFixed || skipCheck)) {
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stickTree();
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} else if (!shouldBeFixed && (isFixed || skipCheck)) {
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unstickTree();
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}
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}
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// The event ran when the window scrolls
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function windowScrollEvent() {
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checkTreeStickiness(false);
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}
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// If the page is scrollable and the window is wide enough listen to scroll events
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// and evaluate tree stickiness.
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if (pageScrollable && $window.width() > 1000) {
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$window.on('scroll', windowScrollEvent);
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checkTreeStickiness(true);
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}
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// Handle window resizing and switch between desktop/mobile views
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$window.on('resize', event => {
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if (pageScrollable && $window.width() > 1000) {
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$window.on('scroll', windowScrollEvent);
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checkTreeStickiness(true);
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} else {
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$window.off('scroll', windowScrollEvent);
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unstickTree();
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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 i = 0; i !== headings.length; ++i) {
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pageNavObserver.observe(headings[i]);
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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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let anchorsToHighlight = pageNav.querySelectorAll('a[href="#' + elementId + '"]');
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for (let i = 0; i < anchorsToHighlight.length; i++) {
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// Change below to use classList.toggle when IE support is dropped.
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if (shouldHighlight) {
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anchorsToHighlight[i].classList.add('current-heading');
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} else {
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anchorsToHighlight[i].classList.remove('current-heading');
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}
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}
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}
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}
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setupEditOnHeader() {
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const headingEditIcon = document.querySelector('.heading-edit-icon');
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if (headingEditIcon === null) {
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// user does not have permission to edit.
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return;
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}
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// Create a clone of the edit icon without the hidden class
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const visibleHeadingEditIcon = headingEditIcon.cloneNode(true);
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visibleHeadingEditIcon.style.display = '';
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const headings = document.querySelector('.page-content').querySelectorAll('h1, h2, h3, h4, h5, h6');
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// add an edit icon to each header.
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for (let i = 0; i !== headings.length; ++i) {
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const currHeading = headings[i];
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const headingId = currHeading.id;
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let editIcon = visibleHeadingEditIcon.cloneNode(true);
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// get the first 50 characters.
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let queryContent = currHeading.textContent && currHeading.textContent.substring(0, 50);
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editIcon.href += `?content-id=${headingId}&content-text=${encodeURIComponent(queryContent)}`;
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currHeading.appendChild(editIcon);
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}
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}
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}
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module.exports = PageDisplay;
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