= reveal.js backend for Asciidoctor :toc: preamble :toclevels: 2 :uri-us: https://github.com/asciidoctor/asciidoctor-reveal.js :uri-asciidoctor: https://github.com/asciidoctor/asciidoctor :uri-asciidoctorjs: https://github.com/asciidoctor/asciidoctor.js :uri-revealjs-home: http://lab.hakim.se/reveal-js/ :uri-revealjs-gh: https://github.com/hakimel/reveal.js :uri-nodejs-download: https://nodejs.org/en/download/ // Changes made here should be sync'ed in packages.json's readme field The {uri-us}[reveal.js backend] is a collection of templates for {uri-asciidoctor}[Asciidoctor] (or {uri-asciidoctorjs}[Asciidoctor.js]) that transform an AsciiDoc document into HTML5 slides animated by {uri-revealjs-home}[reveal.js]. //image:https://travis-ci.org/asciidoctor/asciidoctor-reveal.js.svg?branch=master[Build Status,link=https://travis-ci.org/asciidoctor/asciidoctor-reveal.js] There are two main technology stacks that can transform AsciiDoc into HTML5 / Reveal.js: * Asciidoctor / Ruby / Slim / Bundler (<>) * Asciidoctor.js / JavaScript / Jade / Node.js (<>) Right now the Ruby / Slim templates are more featureful but that is changing quickly. [[ruby]] == Ruby Setup NOTE: asciidoctor-reveal.js is now a Ruby Gem. To ensure repeatability, we recommend that you manage your presentation projects using bundler. For a quick start clone our https://github.com/obilodeau/presentation-revealjs-starter[starter repository] and follow instructions there. For more complete instructions, read on. NOTE: If you want to use reveal.js 2, please clone the asciidoctor-reveal.js repo and switch to the reveal.js-2.x branch. === Prerequisites . Install http://bundler.io/[bundler] (if not already installed) using your system's package manager or with: $ gem install bundler . If you're using RVM, make sure you switch away from any gemset: $ rvm use default + or + $ rvm use system === Install NOTE: These instructions should be repeated for every presentation project. . Create project directory $ mkdir my-awesome-presentation $ cd my-awesome-presentation . Create a file named `Gemfile` with the following content: + ---- source 'https://rubygems.org' gem 'asciidoctor-revealjs', github: 'asciidoctor/asciidoctor-reveal.js' ---- + NOTE: For some reason, when you use the system Ruby on Fedora, you also have to add the json gem to the Gemfile. + . Install the gems into the project $ bundle config --local github.https true $ bundle --path=.bundle/gems --binstubs=.bundle/.bin . Optional: Copy or clone reveal.js presentation framework. Allows you to modify themes or view slides offline. $ git clone -b 3.3.0 --depth 1 https://github.com/hakimel/reveal.js.git === Rendering the AsciiDoc into slides . Create content in a file (*.adoc, *.ad, etc.). See examples in <> section to get started or look at files in `test/`. . Generate HTML presentation from the AsciiDoc source $ bundle exec asciidoctor-revealjs CONTENT_FILE.adoc TIP: If you are using https://pages.github.com/[GitHub Pages], plan ahead by keeping your source files on `master` branch and all output files on the `gh-pages` branch. [[javascript]] == Node / JavaScript Setup === Prerequisites First you must install and configure {uri-nodejs-download}[Node.js] on your machine. === Install Using npm: $ npm i --save asciidoctor.js@1.5.5-2 $ npm i --save asciidoctor-template.js@1.5.5-2 $ npm i --save asciidoctor-reveal.js@1.5.5-2 === Rendering the AsciiDoc into slides Once the package is installed, you can convert AsciiDoc files using Reveal.js backend. Here we are converting a file named `presentation.adoc` into a Reveal.js presentation using Node.js: .asciidoctor-revealjs.js [source, javascript] ---- // Load asciidoctor.js + asciidoctor-template.js var asciidoctor = require('asciidoctor.js')(); var Asciidoctor = asciidoctor.Asciidoctor(); var Opal = asciidoctor.Opal; Opal.load('nodejs'); Opal.load('pathname'); require('asciidoctor-template.js'); // Convert the document 'presentation.adoc' using Reveal.js backend var attributes = 'revealjsdir=node_modules/reveal.js@'; var options = Opal.hash({safe: 'safe', backend: 'revealjs', attributes: attributes}); Asciidoctor.$convert_file('presentation.adoc', options); // <1> ---- <1> Creates a file named `presentation.html` (in the directory where command is run) .presentation.adoc [source, asciidoc] ---- = Title Slide // depending on your npm version, you might need to override the default // 'revealjsdir' value by removing the comments from the line below: //:revealjsdir: node_modules/asciidoctor-reveal.js/node_modules/reveal.js == Slide One * Foo * Bar * World ---- To render the slides, run: node asciidoctor-reveal.js You can open the `presentation.html` file in your browser and enjoy! == Syntax Examples // FIXME: incomplete Let's see some examples of `revealjs` backend features. === Basic presentation with speaker notes ---- = Title Slide == Slide One * Foo * Bar * World == Slide Two Hello World - Good Bye Cruel World [NOTE.speaker] -- Actually things aren't that bad -- ---- In previous snippet we are creating a slide titled Slide One with bullets and another one titled Slide Two with centered text (reveal.js' default behavior) with {uri-revealjs-gh}#speaker-notes[speaker notes]. === Slides without titles There are a few ways to have no titles on slides. * Setting your title to `!` * Adding the `notitle` option to your slide * Adding the `conceal` option to your slide Here is an example of the three techniques in action: ---- include::test/concealed-slide-titles.adoc[] ---- NOTE: `conceal` and `notitle` have the advantage that the slide still has an id so it can be linked to. === Background colors ---- [background-color="yellow"] == Slide Three Is very yellow ---- Slide Three applies the attribute {uri-revealjs-gh}#slide-backgrounds[data-background-color] to the `reveal.js`
tag. Anything accepted by CSS color formats works. === Background images ---- [%notitle] == Grand Announcement image::cover.jpg[background, size=cover] ---- This will put `cover.jpg` as the slide's background image. It sets `reveal.js'` `data-background-image` attribute. The `size` attribute is also supported. See the {uri-revealjs-gh}#image-backgrounds[relevant reveal.js documentation] for details. NOTE: Background images file names are now relative to the `:imagedir:` attribute if set. NOTE: The `canvas` keyword can be used instead of `background` for the same effect. ---- [%notitle] == The Great Goat image::https://upload.wikimedia.org/wikipedia/commons/b/b2/Hausziege_04.jpg[canvas,size=contain] ---- As you can see, you can use a URL to specify your image resource too. [#background_videos] === Background videos A background video for a slide can be specified using the `background-video` element attribute. ---- [background-video="https://my.video/file.mp4",background-video-loop=true,background-video-muted=true] == Nice background! ---- For convenience `background-video-loop` and `background-video-muted` attributes are mapped to `loop` and `muted` options which can be specified with `options="loop,muted"`. For example: ---- [background-video="https://my.video/file.mp4",options="loop,muted"] == Nice background! ---- See {uri-revealjs-gh}#video-backgrounds[the relevant reveal.js documentation] for details. Note that the `data-` prefix is not required in asciidoc files. === Background iframes The background can be replaced with anything a browser can render in an iframe using the `background-iframe` reveal.js feature. ---- [%notitle,background-iframe="https://www.youtube.com/embed/LaApqL4QjH8?rel=0&start=3&enablejsapi=1&autoplay=1&loop=1&controls=0&modestbranding=1"] == a youtube video ---- See {uri-revealjs-gh}#iframe-backgrounds[the relevant reveal.js documentation] for details. === Slide Transitions ---- [transition=zoom, %notitle] == Zoom zoom This slide will override the presentation transition and zoom! [transition-speed=fast, %notitle] == Speed Choose from three transition speeds: default, fast or slow! ---- See {uri-revealjs-gh}#slide-transitions[the relevant reveal.js documentation] for details. === Fragments ---- == Slide Four [%step] * this * is * revealed * gradually ---- Slide Four has bullets that are revealed one after the other. This is what `reveal.js` calls http://lab.hakim.se/reveal-js/#/fragments[fragments]. Applying the step option or role on a list (`[%step]` or `[.step]`) will do the trick. Here is {uri-revealjs-gh}#fragments[the relevant reveal.js documentation] on the topic. Note that only `fade-in` is supported for lists at the moment. === Stretch class attribute Reveal.js supports a special class that will give all available screen space to an HTML node. This class element is named `stretch`. __ Sometimes it's desirable to have an element, like an image or video, stretch to consume as much space as possible within a given slide. __ To apply that class to block simply use asciidoctor's class assignment: [.stretch] See {uri-revealjs-gh}#stretching-elements[reveal.js documentation on stretching elements]. === Videos In addition to <>, videos can be inserted directly into slides. The syntax is the standard http://asciidoctor.org/docs/user-manual/#video[asciidoc video block macro] syntax. ---- == Trains, we love trains! video::kZH9JtPBq7k[youtube, start=34, options=autoplay] ---- By default videos are given as much space as possible. To override that behavior use the `width` and `height` named attributes. === Syntax highlighting [listing] .... == Slide Five Uses highlighted code ---- print "Hello World" ---- .... `revealjs` uses https://highlightjs.org/[highlight.js] to do its syntax highlighting by default. By default `[source]` blocks and blocks delimited by `----` will be highlighted. An explicit `[listing]` block will not be highlighted. `highlight.js` does language auto-detection but using the `language="..."` attribute will hint the highlighter. For example this will highlight this source code as Perl: [listing] .... == Slide Five [source,perl] ---- print "$0: hello world\n" ---- .... [NOTE] Currently `revealjs` uses a rather old version of https://highlightjs.org/[highlight.js] that does not handle callouts correctly. To fix this download a current version of https://highlightjs.org/[highlight.js] and copy it to `reveal.js/plugin/highlight/highlight.js`. Alternatively, you can use http://coderay.rubychan.de[Coderay] or http://pygments.org[Pygments] as the highlighter. These handle callouts correctly. To use http://coderay.rubychan.de[Coderay]: ---- = Title slide :source-highlighter: coderay ---- To use http://pygments.org[Pygments]: ---- = Title slide :source-highlighter: pygments ---- === Vertical slides [listing] .... == Slide Six Top slide === Slide Six.One This is a vertical subslide .... Slide Six uses the vertical slide feature of `reveal.js`. Slide Six.One will be rendered vertically below Slide Six. Here is {uri-revealjs-gh}#markup[the relevant reveal.js documentation] on that topic. === Title slide customization The title slide is customized via Asciidoc attributes. These are the global variable assigned at the top of a document under the lead title that look like this: `:name: value`. This back-end supports changing the color, image, video, iframe and transitions of the title slide. Read {uri-revealjs-gh}#slide-backgrounds[the relevant reveal.js documentation] to understand what attributes need to be set. Keep in mind that for title slides you must replace `data-` with `title-slide-`. Here is an example: ---- include::test/title-slide-image.adoc[] ---- The title slide is also added a `title` CSS class to help with template customization. === Content meant for multiple back-ends Some content can be created with both slides and book in mind. To mark slides split points you can use preprocessor conditionals combined with back-end declaration. Breaking points are set using slides with no title `=== !` wrapped in a conditional: `ifdef::backend-revealjs[=== !]`. In the end, the whole document has to be compiled with the back-end option: `-b revealjs` For example: ---- == Main section === Sub Section Small + Multiline + intro . very . long . list . of . items \ifdef::backend-revealjs[=== !] Some overview diagram \ifdef::backend-revealjs[=== !] Detailed view diagram ---- === CSS override If you use the `:customcss:` document attribute, a CSS file of the name given in the attribute is added to the list of CSS resources loaded by the rendered HTML. Doing so, you can then easily override specific elements of your theme per presentation. For example, to do proper position-independent text placement of a title slide with a specific background you can use: ---- .reveal section.title h1 { margin-top: 2.3em; } .reveal section.title small { margin-top: 15.3em; font-weight: bold; color: white; } ---- If the `:customcss:` attribute value is empty then `asciidoctor-revealjs.css` is the CSS resource that the presentation is linked to. === Slide state Reveal.js supports a {uri-revealjs-gh}#slide-states[data-state] tag that can be added on slides which gets rendered into `
` tags. In AsciiDoc the `data-state` can be applied to a slide by adding a state attribute to a section like this: ---- [state=topic] == Epic Topic ---- That state can be queried from Javascript or used in CSS to apply further customization to your slide deck. For example, by combining this feature with the <<_css_override, CSS override>> one, you can alter fonts for specific pages with this CSS: ---- @import 'https://fonts.googleapis.com/css?family=Baloo+Bhai'; section[data-state="topic"] h2 { font-family: 'Baloo Bhai', cursive; font-size: 4em; } ---- // FIXME this is no longer accurate == About Jade Templates `/templates/jade` directory contains jade template files they are ported from `/templates/slim` templates. These templates were written to support reveal.js backend for Asciidoctor.js environment that is currently using in https://github.com/asciidocfx/AsciidocFX[AsciidocFX] editor. You can look at the https://github.com/asciidocfx/asciidoctor.js-reveal-demo[demo]. == reveal.js Options There are some attributes that can be set at the top of the document which they are specific of +revealjs+ backend. NOTE: Default settings are based on `reveal.js` default settings. [cols="1m,1,2"] |=== |Attribute |Value(s) |Description |:revealjs_theme: |beige, *black*, league, night, serif, simple, sky, solarized, white |Chooses one of reveal.js' {uri-revealjs-gh}#theming[built-in themes]. |:revealjs_customtheme: | |Overrides CSS with given file or URL. Default is disabled. |:highlightjs-theme: | |Overrides https://highlightjs.org[highlight.js] CSS style with given file or URL. Default is built-in [path]_lib/css/zenburn.css_. |:revealjsdir: | |Overrides reveal.js directory. Example: ../reveal.js or https://cdnjs.cloudflare.com/ajax/libs/reveal.js/3.3.0 |:revealjs_controls: |*true*, false |Display controls in the bottom right corner. |:revealjs_progress: |*true*, false |Display a presentation progress bar. |:revealjs_slideNumber: |true, *false* |Display the page number of the current slide. |:revealjs_history: |true, *false* |Push each slide change to the browser history. |:revealjs_keyboard: |*true*, false |Enable keyboard shortcuts for navigation. |:revealjs_overview: |*true*, false |Enable the slide overview mode. |:revealjs_touch: |*true*, false |Enables touch navigation on devices with touch input. |:revealjs_center: |*true*, false |Vertical centering of slides. |:revealjs_loop: |true, *false* |Loop the presentation. |:revealjs_rtl: |true, *false* |Change the presentation direction to be RTL. |:revealjs_fragments: |*true*, false |Turns fragments on and off globally. |:revealjs_embedded: |true, *false* |Flags if the presentation is running in an embedded mode (i.e., contained within a limited portion of the screen). |:revealjs_autoSlide: | |Delay in milliseconds between automatically proceeding to the next slide. Disabled when set to *0* (the default). This value can be overwritten by using a `data-autoslide` attribute on your slides. |:revealjs_autoSlideStoppable: |*true*, false |Stop auto-sliding after user input. |:revealjs_mouseWheel: |true, *false* |Enable slide navigation via mouse wheel. |:revealjs_hideAddressBar: |*true*, false |Hides the address bar on mobile devices. |:revealjs_previewLinks: |true, *false* |Opens links in an iframe preview overlay. |:revealjs_transition: |none, fade, *slide*, convex, concave, zoom |Transition style. |:revealjs_transitionSpeed: |*default*, fast, slow |Transition speed. |:revealjs_backgroundTransition: |none, *fade*, slide, convex, concave, zoom |Transition style for full page slide backgrounds. |:revealjs_viewDistance: | |Number of slides away from the current that are visible. Default: 3 |:revealjs_parallaxBackgroundImage: | |Parallax background image. Defaults to none |:revealjs_parallaxBackgroundSize: | |Parallax background size (accepts any CSS syntax). Defaults to none |=== If you want to build a custom theme or customize an existing one you should look at the {uri-revealjs-gh}/blob/master/css/theme/README.md[reveal.js theme documentation] and use the `revealjs_customtheme` AsciiDoc attribute to activate it. == Minimum Requirements * asciidoctor 1.5.4 == Copyright and Licensing Copyright (C) 2012-2016 Olivier Bilodeau, Charles Moulliard, Dan Allen and the Asciidoctor Project. Free use of this software is granted under the terms of the MIT License. See the <> file for details.