Generate HTML5 slideshows from markdown, ReST, or textile
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Overview

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Lightweight markup language (Markdown, ReST, or Textile) slideshow generator. Forked from landslide.

Demo: http://ionelmc.github.io/python-darkslide/

# Darkslide

---

# Overview

Generate HTML5 slideshows from markdown, ReST, or textile.

![python](http://i.imgur.com/bc2xk.png)

Darkslide is primarily written in Python, but it's themes use:

- HTML5
- Javascript
- CSS

---

# Code Sample

Darkslide supports code snippets

    !python
    def log(self, message, level='notice'):
        if self.logger and not callable(self.logger):
            raise ValueError(u"Invalid logger set, must be a callable")

        if self.verbose and self.logger:
            self.logger(message, level)

Requirements

python and the following modules:

  • jinja2
  • pygments for code blocks syntax coloration

Markup Conversion

Optional

  • watchdog for watching/auto-regeneration with the -w flag

Installation

Install the latest stable version of Darkslide with a python package manager like pip:

$ pip install darkslide

If you want to stay on the edge:

$ git clone https://github.com/adamzap/landslide.git
$ cd landslide
$ python setup.py build
$ sudo python setup.py install

Formatting

Markdown

  • Your Markdown source files must be suffixed by .md, .markdn, .mdwn, .mdown or .markdown
  • To create a title slide, render a single h1 element (eg. # My Title)
  • Separate your slides with a horizontal rule (--- in markdown) except at the end of md files
  • Your other slides should have a heading that renders to an h1 element
  • To highlight blocks of code, put !lang where lang is the pygment supported language identifier as the first indented line

ReStructuredText

  • Your ReST source files must be suffixed by .rst or .rest (``.txt`` is not supported)
  • Use headings for slide titles
  • Separate your slides using an horizontal rule (---- in RST) except at the end of RST files

Textile

  • Separate your slides using ---, just like in markdown

Rendering

  • Run landslide slides.md or landslide slides.rst
  • Enjoy your newly generated presentation.html

Viewing

  • Press h to toggle display of help
  • Press left arrow and right arrow to navigate
  • Press t to toggle a table of contents for your presentation. Slide titles are links
  • Press ESC to display the presentation overview (Exposé)
  • Press n to toggle slide number visibility
  • Press b to toggle screen blanking
  • Press c to toggle double slide display (current and next slides)
  • Press S to toggle display of link to the source file for each slide
  • Press '2' to toggle notes in your slides (specify with the .notes macro)
  • Browser zooming is not supported

Commandline Options

Usage:

darkslide [options] input.md ...
Options:
--version show program's version number and exit
-h, --help show this help message and exit
-c, --copy-theme
 Copy theme directory into current presentation source directory.
-b, --debug Will display any exception trace to stdout.
-d FILE, --destination=FILE
 The path to the to the destination html file. Default: presentation.html.
-e ENCODING, --encoding=ENCODING
 The encoding of your files. Default: utf8.
-i, --embed Embed stylesheet and javascript contents, base64-encoded images and objects in presentation to make a standalone document.
-l LINENOS, --linenos=LINENOS
 How to output linenos in source code. Three options available: no (no line numbers); inline (inside <pre> tag); table (lines numbers in another cell, copy-paste friendly).
-o, --direct-output
 Prints the generated HTML code to stdout.
-P, --no-presenter-notes
 Don't include presenter notes in the output.
-q, --quiet Won't write anything to stdout (silent mode).
-r, --relative Make your presentation asset links relative to current working dir; This may be useful if you intend to publish your html presentation online.
-t THEME, --theme=THEME
 A theme name, or path to a landlside theme directory
-v, --verbose Write informational messages to stdout (enabled by default).
-x EXTENSIONS, --extensions=EXTENSIONS
 Comma-separated list of extensions for Markdown.
-w, --watch Watch source directory for changes and regenerate slides.

Presentation Configuration

Darkslide allows to configure your presentation using a cfg configuration file, therefore easing the aggregation of source directories and the reuse of them across presentations. Darkslide configuration files use the cfg syntax. If you know ini files, you get the picture. Below is a sample configuration file:

[darkslide]
; the old [landslide] is still supported
theme  = /path/to/my/beautiful/theme
source = 0_my_first_slides.md
         a_directory
         another_directory
         now_a_slide.markdown
         another_one.rst
destination = myWonderfulPresentation.html
css =    my_first_stylesheet.css
         my_other_stylesheet.css
js =     jquery.js
         my_fancy_javascript.js
relative = True
linenos = inline

Don't forget to declare the [darkslide] section. All configuration files must end in the .cfg extension.

To generate the presentation as configured, just run:

$ cd /path/to/my/presentation/sources
$ darkslide config.cfg

Macros

You can use macros to enhance your presentation:

Notes

Add notes to your slides using the .notes: keyword, eg.:

# My Slide Title

.notes: These are my notes, hidden by default

My visible content goes here

You can toggle display of notes by pressing the 2 key.

Some other macros are also available by default: .fx: foo bar will add the foo and bar classes to the corresponding slide <div> element, easing styling of your presentation using CSS.

QR Codes

Add a QR Code to your presentation by using the .qr keyword:

.qr: 450|https://github.com/ionelmc/python-darkslide

Footnote

Add footnote to the current and all the following presentations

.footnote: Slides available at https://blog.ionelmc.ro/presentations/

Presenter Notes

You can also add presenter notes to each slide by following the slide content with a heading entitled "Presenter Notes". Press the 'p' key to open the presenter view.

Registering Macros

Macros are used to transform the HTML contents of your slide.

You can register your own macros by creating darkslide.macro.Macro derived classes, implementing a process(content, source=None) method and returning a tuple containing the modified contents and some css classes you may be wanting to add to your slide <div> element. For example:

!python
import darkslide

class MyMacro(darkslide.Macro):
  def process(self, content, source=None):
    return content + '<p>plop</p>', ['plopped_slide']

g = darkslide.generator.Generator(source='toto.md')
g.register_macro(MyMacro)
print g.render()

This will render any slide as below:

!html
<div class="slide plopped_slide">
  <header><h2>foo</h2></header>
  <section>
    <p>my slide contents</p>
    <p>plop</p>
  </section>
</div>

Advanced Usage

Setting Custom Destination File

$ darkslide slides.md -d ~/MyPresentations/presentation.html

Working with Directories

$ darkslide slides/

Working with Direct Output

$ darkslide slides.md -o | tidy

Using an Alternate Darkslide Theme

$ darkslide slides.md -t mytheme
$ darkslide slides.md -t /path/to/theme/dir

Embedding Base-64-Encoded Images

$ darkslide slides.md -i

Enabling Markdown Extensions

See documentation on available Markdown extensions here:

$ darkslide slides.md -x abbr

Theming

A Darkslide theme is a directory following this simple structure:

mytheme/
|-- base.html
|-- css
|   |-- print.css
|   `-- screen.css
`-- js
    `-- slides.js

If a theme does not provide HTML and JS files, those from the default theme will be used. CSS is not optional.

Last, you can also copy the whole theme directory to your presentation one by passing the --copy-theme option to the darkslide command:

$ darkslide slides.md -t /path/to/some/theme --copy-theme

User stylesheets and Javascripts

If you don't want to bother making your own theme, you can include your own user css and js files to the generated presentation.

This feature is only available if you use a Darkslide configuration file, by setting the css and/or js flags:

[darkslide]
; the old [landslide] is still supported
theme  = /path/to/my/beautiful/theme
source = slides.mdown
css =    custom.css
js =     jquery.js
         powerpoint.js

These will link the custom.css stylesheet and both the jquery.js and powerpoint.js files within the <head> section of the presentation html file.

NOTE: Paths to the css and js files must be relative to the directory you're running the darkslide command from.

Publishing your Presentation Online

If you intend to publish your HTML presentation online, you'll have to use the --relative option, as well as the --copy-theme one to have all asset links relative to the root of your presentation;

$ darkslide slides.md --relative --copy-theme

That way, you'll just have to host the whole presentation directory to a webserver. Of course, no Python nor PHP nor anything else than a HTTP webserver (like Apache) is required to host a Darkslide presentation.

Here's an example.

Theme Variables

The base.html must be a Jinja2 template file where you can harness the following template variables:

  • css: the stylesheet contents, available via two keys, print and screen, both having:
  • a path_url key storing the url to the asset file path
  • a contents key storing the asset contents
  • js: the javascript contents, having:
  • a path_url key storing the url to the asset file path
  • a contents key storing the asset contents
  • slides: the slides list, each one having these properties:
  • header: the slide title
  • content: the slide contents
  • number: the slide number
  • embed: is the current document a standalone one?
  • num_slides: the number of slides in current presentation
  • toc: the Table of Contents, listing sections of the document. Each section has these properties available:
  • title: the section title
  • number: the slide number of the section
  • sub: subsections, if any

Styles Scope

  • To change HTML5 presentation styles, tweak the css/screen.css stylesheet bundled with the theme you are using
  • For printing, modify the css/print.css

Authors

The project was originally named Landslide and was authored by Adam Zapletal (adamzap@gmail.com) and Nicolas Perriault (nperriault@gmail.com)

Slide code is based on html5-slides.

More details: https://github.com/ionelmc/python-darkslide/contributors