diff options
Diffstat (limited to 'static')
| -rw-r--r-- | static/reveal-unfold.js | 127 | ||||
| -rw-r--r-- | static/unfold.js | 86 |
2 files changed, 127 insertions, 86 deletions
diff --git a/static/reveal-unfold.js b/static/reveal-unfold.js new file mode 100644 index 0000000..931b058 --- /dev/null +++ b/static/reveal-unfold.js @@ -0,0 +1,127 @@ +window.Unfold = { + activate: async function (opts) { + const separator = opts.separator || "hr"; + const content = opts.content || "main"; + const theme = opts.theme || "moon"; + const revealCdn = opts.revealCdn || "https://cdnjs.cloudflare.com/ajax/libs/reveal.js/3.6.0"; + const revealPlugins = opts.revealPlugins || []; // e.g. ["notes"] + const revealOptions = opts.revealOptions || {}; + const revealCss = opts.revealCss || ""; + + const contentElem = document.querySelector(content); + if (!contentElem) { + console.error(`Unfold: content element not found`); + return; + } + + const nodes = [...contentElem.childNodes]; + + const newBody = document.createElement("body"); + newBody.setAttribute("class", "reveal"); + const slides = document.createElement("div"); + slides.setAttribute("class", "slides"); + newBody.appendChild(slides); + + const newHead = document.createElement("head"); + + const titleSlide = document.createElement("section"); + const titleH1 = document.createElement("h1"); + titleH1.textContent = document.title; + titleSlide.appendChild(titleH1); + slides.appendChild(titleSlide); + + let currentSlide = document.createElement("section"); + for (const node of nodes) { + if (node.hasAttribute && node.hasAttribute("data-unfold-hidden")) { + continue; + } + + if (node.tagName?.toLowerCase() === separator.toLowerCase()) { + slides.appendChild(currentSlide); + currentSlide = document.createElement("section"); + } else if (node.matches && node.matches("figure:has(img)")) { + const figcaption = node.querySelector("figcaption"); + if (figcaption) { + const small = document.createElement("small"); + small.textContent = figcaption.textContent; + small.style.display = "block"; + currentSlide.appendChild(small); + } + + const img = node.querySelector("img"); + img.classList.add("r-stretch"); + currentSlide.appendChild(img); + } else { + currentSlide.appendChild(node); + } + } + slides.appendChild(currentSlide); + + const revealCssTag = document.createElement("link"); + revealCssTag.rel = "stylesheet"; + revealCssTag.href = `${revealCdn}/css/reveal.min.css`; + newHead.appendChild(revealCssTag); + + const revealThemeCssTag = document.createElement("link"); + revealThemeCssTag.rel = "stylesheet"; + revealThemeCssTag.href = `${revealCdn}/css/theme/${theme}.css`; + newHead.appendChild(revealThemeCssTag); + + for (const plugin of revealPlugins) { + const pluginJsTag = document.createElement("script"); + pluginJsTag.src = `${revealCdn}/plugin/${plugin}/${plugin}.js`; + newHead.appendChild(pluginJsTag); + } + + const revealJsTag = document.createElement("script"); + revealJsTag.src = `${revealCdn}/js/reveal.min.js`; + revealJsTag.onload = () => { + // evaluate plugins in a dynamic scope in order to access plugins etc. + const evaledPlugins = revealPlugins.map(p => { + const symbolName = `Reveal${p.charAt(0).toUpperCase() + p.slice(1)}`; + return eval(symbolName); + }); + // activate Reveal slideshow + const reveal = { ...revealOptions, plugins: evaledPlugins }; + console.log(reveal); + Reveal.initialize(reveal); + // fix vertical positioning issue that happens often + setTimeout(() => Reveal.sync(), 100); + }; + newHead.appendChild(revealJsTag); + + const revealCustomCssTag = document.createElement("style"); + revealCustomCssTag.innerHTML = revealCss; + newHead.appendChild(revealCustomCssTag); + + document.head.replaceWith(newHead); + document.body.replaceWith(newBody); + }, + enable: function (opts = {}) { + // if the URL has ?unfold=1, activate the slideshow + const qp = new URLSearchParams(location.search); + if (qp.get("unfold") === "1") { + void Unfold.activate(opts) + } + + // listen for clicks on links with ?unfold=1 + // to activate the slideshow without a page reload for a smoother experience + const unfoldLinks = document.querySelectorAll("a[href*='unfold=1']"); + for (const link of unfoldLinks) { + link.addEventListener("click", function (e) { + e.preventDefault(); + history.pushState({}, "", this.href); + void Unfold.activate(opts); + }); + } + } +} + +const previousOnPopState = window.onpopstate; +window.onpopstate = function() { + if (typeof previousOnPopState === "function") { + previousOnPopState(); + } + location.reload(); +}; + diff --git a/static/unfold.js b/static/unfold.js deleted file mode 100644 index e27dbb5..0000000 --- a/static/unfold.js +++ /dev/null @@ -1,86 +0,0 @@ -window.Unfold = { - activate: function (opts) { - const separator = opts.separator || "hr"; - const content = opts.content || "main"; - const theme = opts.theme || "moon"; - const revealCdn = opts.revealCdn || "https://cdnjs.cloudflare.com/ajax/libs/reveal.js/3.6.0"; - - const contentElem = document.querySelector(content); - if (!contentElem) { - console.error(`Unfold: content element not found`); - return; - } - - const nodes = [...contentElem.childNodes]; - - const newBody = document.createElement("body"); - newBody.setAttribute("class", "reveal"); - const slides = document.createElement("div"); - slides.setAttribute("class", "slides"); - newBody.appendChild(slides); - - const newHead = document.createElement("head"); - - let currentSlide = document.createElement("section"); - for (const node of nodes) { - if (node.hasAttribute && node.hasAttribute("data-unfold-hidden")) { - continue; - } - - if (node.tagName?.toLowerCase() === separator.toLowerCase()) { - slides.appendChild(currentSlide); - currentSlide = document.createElement("section"); - } else { - currentSlide.appendChild(node); - } - } - slides.appendChild(currentSlide); - - const revealCssTag = document.createElement("link"); - revealCssTag.rel = "stylesheet"; - revealCssTag.href = `${revealCdn}/css/reveal.min.css`; - newHead.appendChild(revealCssTag); - - const revealThemeCssTag = document.createElement("link"); - revealThemeCssTag.rel = "stylesheet"; - revealThemeCssTag.href = `${revealCdn}/css/theme/${theme}.css`; - newHead.appendChild(revealThemeCssTag); - - const revealJsTag = document.createElement("script"); - revealJsTag.src = `${revealCdn}/js/reveal.min.js`; - revealJsTag.onload = () => { - // activate Reveal slideshow - Reveal.initialize(); - // fix vertical positioning issue that happens often - setTimeout(() => Reveal.sync(), 100); - }; - newHead.appendChild(revealJsTag); - - document.head.replaceWith(newHead); - document.body.replaceWith(newBody); - }, - bind: function (selector, opts = {}) { - const elem = document.querySelector(selector); - elem.addEventListener("click", () => { - Unfold.activate(opts) - // enable back button by hooking into History API - const qp = new URLSearchParams(location.search); - qp.set("unfold", "1"); - history.pushState({}, "", `${location.protocol}//${location.host}${location.pathname}?${qp.toString()}`); - }) - - const qp = new URLSearchParams(location.search); - if (qp.get("unfold") === "1") { - Unfold.activate(opts) - } - } -} - -const previousOnPopState = window.onpopstate; -window.onpopstate = function() { - if (typeof previousOnPopState === "function") { - previousOnPopState(); - } - location.reload(); -}; - |