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gfonts

library(gfonts)

{gfonts} allow you to use a Google font to use it offline in a Shiny application or a R Markdown document. You can download a font via google-webfonts-helper and generate appropriate CSS to use it.

Setup a font to use in your project

In your project directory, use setup_font once to download a font and generate CSS code. For example to use the Roboto font, you can do :

setup_font(
  id = "roboto",
  output_dir = "www",
  variants = "regular"
)

In a Shiny application you can use www/ folder, for R Markdown, create a sub-folder at the same level as your .Rmd file.

setup_font() will create two sub-folders, containing the following files :

www
+-- css
|   \-- roboto.css
\-- fonts
    +-- roboto-v20-latin-regular.eot
    +-- roboto-v20-latin-regular.svg
    +-- roboto-v20-latin-regular.ttf
    +-- roboto-v20-latin-regular.woff
    \-- roboto-v20-latin-regular.woff2

To know all fonts and their ids, you can use get_all_fonts() :

head(get_all_fonts())
#>             id       family
#> 1       roboto       Roboto
#> 2    open-sans    Open Sans
#> 3 noto-sans-jp Noto Sans JP
#> 4   montserrat   Montserrat
#> 5         lato         Lato
#> 6      poppins      Poppins
#>                                                                                                                                          variants
#> 1                                                 100, 100italic, 300, 300italic, regular, italic, 500, 500italic, 700, 700italic, 900, 900italic
#> 2                                                 300, regular, 500, 600, 700, 800, 300italic, italic, 500italic, 600italic, 700italic, 800italic
#> 3                                                                                                                100, 300, regular, 500, 700, 900
#> 4 100, 200, 300, regular, 500, 600, 700, 800, 900, 100italic, 200italic, 300italic, italic, 500italic, 600italic, 700italic, 800italic, 900italic
#> 5                                                                 100, 100italic, 300, 300italic, regular, italic, 700, 700italic, 900, 900italic
#> 6 100, 100italic, 200, 200italic, 300, 300italic, regular, italic, 500, 500italic, 600, 600italic, 700, 700italic, 800, 800italic, 900, 900italic
#>                                                                          subsets
#> 1         cyrillic, cyrillic-ext, greek, greek-ext, latin, latin-ext, vietnamese
#> 2 cyrillic, cyrillic-ext, greek, greek-ext, hebrew, latin, latin-ext, vietnamese
#> 3                                                                japanese, latin
#> 4                           cyrillic, cyrillic-ext, latin, latin-ext, vietnamese
#> 5                                                               latin, latin-ext
#> 6                                                   devanagari, latin, latin-ext
#>     category version lastModified popularity defSubset defVariant
#> 1 sans-serif     v30   2022-09-22          1     latin    regular
#> 2 sans-serif     v34   2022-09-22          2     latin    regular
#> 3 sans-serif     v42   2022-09-27          3     latin    regular
#> 4 sans-serif     v25   2022-09-22          4     latin    regular
#> 5 sans-serif     v23   2022-09-22          5     latin    regular
#> 6 sans-serif     v20   2022-09-22          6     latin    regular

Use a font

To use a downloaded font, you can use in your UI or in a chunk :

use_font("roboto", "www/css/roboto.css")

First argument is the id of font downloaded, second is path to CSS file generated.

An other solution in Shiny application is to import the CSS file in a link tag and add a style tag:

fluidPage(
  
  tags$link(rel = "stylesheet", type = "text/css", href = "css/roboto.css"),
  tags$style("body {font-family: 'Roboto', sans-serif;}")
  
)

In Markdown, import CSS file in yaml header, and add a CSS chunk :

---
output: 
  html_document:
    css: assets/css/roboto.css
---


```css
body {font-family: 'Roboto', sans-serif;}
```

Download a font

If you only want to download a font, you can use:

download_font(
  id = "roboto",
  output_dir = "azerty",
  variants = c("regular", "300italic", "700")
)

Generate CSS

To download CSS code to import a font in HTML, you can use:

generate_css("roboto", "regular", font_dir = "path/to/font")
#> @font-face {
#>   font-family: 'Roboto';
#>   font-style: normal;
#>   font-weight: 400;
#>   src: url('path/to/roboto-v30-latin-regular.eot'); /* IE9 Compat Modes */
#>   src: local(''), local(''),
#>        url('path/to/roboto-v30-latin-regular.eot?#iefix') format('embedded-opentype'), /* IE6-IE8 */
#>        url('path/to/roboto-v30-latin-regular.woff2') format('woff2'), /* Super Modern Browsers */
#>        url('path/to/roboto-v30-latin-regular.woff') format('woff'), /* Modern Browsers */
#>        url('path/to/roboto-v30-latin-regular.ttf') format('truetype'), /* Safari, Android, iOS */
#>        url('path/to/roboto-v30-latin-regular.svg#\1') format('svg'); /* Legacy iOS */
#> }

The path must be relative to the one were this code is saved.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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