Añade guía de mdBook como referencia para PageTop

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Manuel Cillero 2022-07-24 16:14:50 +02:00
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# Theme
The default renderer uses a [handlebars](http://handlebarsjs.com/) template to
render your markdown files and comes with a default theme included in the mdBook
binary.
The theme is totally customizable, you can selectively replace every file from
the theme by your own by adding a `theme` directory next to `src` folder in your
project root. Create a new file with the name of the file you want to override
and now that file will be used instead of the default file.
Here are the files you can override:
- **_index.hbs_** is the handlebars template.
- **_head.hbs_** is appended to the HTML `<head>` section.
- **_header.hbs_** content is appended on top of every book page.
- **_css/_** contains the CSS files for styling the book.
- **_css/chrome.css_** is for UI elements.
- **_css/general.css_** is the base styles.
- **_css/print.css_** is the style for printer output.
- **_css/variables.css_** contains variables used in other CSS files.
- **_book.js_** is mostly used to add client side functionality, like hiding /
un-hiding the sidebar, changing the theme, ...
- **_highlight.js_** is the JavaScript that is used to highlight code snippets,
you should not need to modify this.
- **_highlight.css_** is the theme used for the code highlighting.
- **_favicon.svg_** and **_favicon.png_** the favicon that will be used. The SVG
version is used by [newer browsers].
Generally, when you want to tweak the theme, you don't need to override all the
files. If you only need changes in the stylesheet, there is no point in
overriding all the other files. Because custom files take precedence over
built-in ones, they will not get updated with new fixes / features.
**Note:** When you override a file, it is possible that you break some
functionality. Therefore I recommend to use the file from the default theme as
template and only add / modify what you need. You can copy the default theme
into your source directory automatically by using `mdbook init --theme` and just
remove the files you don't want to override.
`mdbook init --theme` will not create every file listed above.
Some files, such as `head.hbs`, do not have built-in equivalents.
Just create the file if you need it.
If you completely replace all built-in themes, be sure to also set
[`output.html.preferred-dark-theme`] in the config, which defaults to the
built-in `navy` theme.
[`output.html.preferred-dark-theme`]: ../configuration/renderers.md#html-renderer-options
[newer browsers]: https://caniuse.com/#feat=link-icon-svg

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# Editor
In addition to providing runnable code playgrounds, mdBook optionally allows them
to be editable. In order to enable editable code blocks, the following needs to
be added to the ***book.toml***:
```toml
[output.html.playground]
editable = true
```
To make a specific block available for editing, the attribute `editable` needs
to be added to it:
~~~markdown
```rust,editable
fn main() {
let number = 5;
print!("{}", number);
}
```
~~~
The above will result in this editable playground:
```rust,editable
fn main() {
let number = 5;
print!("{}", number);
}
```
Note the new `Undo Changes` button in the editable playgrounds.
## Customizing the Editor
By default, the editor is the [Ace](https://ace.c9.io/) editor, but, if desired,
the functionality may be overridden by providing a different folder:
```toml
[output.html.playground]
editable = true
editor = "/path/to/editor"
```
Note that for the editor changes to function correctly, the `book.js` inside of
the `theme` folder will need to be overridden as it has some couplings with the
default Ace editor.

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# index.hbs
`index.hbs` is the handlebars template that is used to render the book. The
markdown files are processed to html and then injected in that template.
If you want to change the layout or style of your book, chances are that you
will have to modify this template a little bit. Here is what you need to know.
## Data
A lot of data is exposed to the handlebars template with the "context". In the
handlebars template you can access this information by using
```handlebars
{{name_of_property}}
```
Here is a list of the properties that are exposed:
- ***language*** Language of the book in the form `en`, as specified in `book.toml` (if not specified, defaults to `en`). To use in <code
class="language-html">\<html lang="{{ language }}"></code> for example.
- ***title*** Title used for the current page. This is identical to `{{ chapter_title }} - {{ book_title }}` unless `book_title` is not set in which case it just defaults to the `chapter_title`.
- ***book_title*** Title of the book, as specified in `book.toml`
- ***chapter_title*** Title of the current chapter, as listed in `SUMMARY.md`
- ***path*** Relative path to the original markdown file from the source
directory
- ***content*** This is the rendered markdown.
- ***path_to_root*** This is a path containing exclusively `../`'s that points
to the root of the book from the current file. Since the original directory
structure is maintained, it is useful to prepend relative links with this
`path_to_root`.
- ***chapters*** Is an array of dictionaries of the form
```json
{"section": "1.2.1", "name": "name of this chapter", "path": "dir/markdown.md"}
```
containing all the chapters of the book. It is used for example to construct
the table of contents (sidebar).
## Handlebars Helpers
In addition to the properties you can access, there are some handlebars helpers
at your disposal.
### 1. toc
The toc helper is used like this
```handlebars
{{#toc}}{{/toc}}
```
and outputs something that looks like this, depending on the structure of your
book
```html
<ul class="chapter">
<li><a href="link/to/file.html">Some chapter</a></li>
<li>
<ul class="section">
<li><a href="link/to/other_file.html">Some other Chapter</a></li>
</ul>
</li>
</ul>
```
If you would like to make a toc with another structure, you have access to the
chapters property containing all the data. The only limitation at the moment
is that you would have to do it with JavaScript instead of with a handlebars
helper.
```html
<script>
var chapters = {{chapters}};
// Processing here
</script>
```
### 2. previous / next
The previous and next helpers expose a `link` and `name` property to the
previous and next chapters.
They are used like this
```handlebars
{{#previous}}
<a href="{{link}}" class="nav-chapters previous">
<i class="fa fa-angle-left"></i>
</a>
{{/previous}}
```
The inner html will only be rendered if the previous / next chapter exists.
Of course the inner html can be changed to your liking.
------
*If you would like other properties or helpers exposed, please [create a new
issue](https://github.com/rust-lang/mdBook/issues)*

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# Syntax Highlighting
mdBook uses [Highlight.js](https://highlightjs.org) with a custom theme
for syntax highlighting.
Automatic language detection has been turned off, so you will probably want to
specify the programming language you use like this:
~~~markdown
```rust
fn main() {
// Some code
}
```
~~~
## Supported languages
These languages are supported by default, but you can add more by supplying
your own `highlight.js` file:
- apache
- armasm
- bash
- c
- coffeescript
- cpp
- csharp
- css
- d
- diff
- go
- handlebars
- haskell
- http
- ini
- java
- javascript
- json
- julia
- kotlin
- less
- lua
- makefile
- markdown
- nginx
- objectivec
- perl
- php
- plaintext
- properties
- python
- r
- ruby
- rust
- scala
- scss
- shell
- sql
- swift
- typescript
- x86asm
- xml
- yaml
## Custom theme
Like the rest of the theme, the files used for syntax highlighting can be
overridden with your own.
- ***highlight.js*** normally you shouldn't have to overwrite this file, unless
you want to use a more recent version.
- ***highlight.css*** theme used by highlight.js for syntax highlighting.
If you want to use another theme for `highlight.js` download it from their
website, or make it yourself, rename it to `highlight.css` and put it in
the `theme` folder of your book.
Now your theme will be used instead of the default theme.
## Hiding code lines
There is a feature in mdBook that lets you hide code lines by prepending them
with a `#`.
```bash
# fn main() {
let x = 5;
let y = 6;
println!("{}", x + y);
# }
```
Will render as
```rust
# fn main() {
let x = 5;
let y = 7;
println!("{}", x + y);
# }
```
**At the moment, this only works for code examples that are annotated with
`rust`. Because it would collide with semantics of some programming languages.
In the future, we want to make this configurable through the `book.toml` so that
everyone can benefit from it.**
## Improve default theme
If you think the default theme doesn't look quite right for a specific language,
or could be improved, feel free to [submit a new
issue](https://github.com/rust-lang/mdBook/issues) explaining what you
have in mind and I will take a look at it.
You could also create a pull-request with the proposed improvements.
Overall the theme should be light and sober, without too many flashy colors.