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Andrew B. Collier
Andrew B. Collier

Posted on • Originally published at datawookie.dev on

{emayili} Right-to-Left

{emayili} Right-to-Left

Yoav Raskin suggested that it would be useful to support right-to-left (RTL) documents in {emayili}, so that languages like Hebrew, Arabic and Aramaic would render properly. Iโ€™ll be honest, this was not something that I had previously considered. But agreed, it would be a cool feature.

library(emayili)

packageVersion("emayili")

[1] '0.5.5'
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RTL in CSS

The first step to make this happen was writing a short CSS file, rtl.css.

.rtl {
  direction: rtl;
  color: green;
}

body {
  margin: 20px 0px;
}

figure {
  margin-bottom: 20px;
}

.rtl figcaption {
  direction: inherit;
}
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This makes use of the CSS direction property (which by default is ltr), setting it to rtl. Iโ€™m also colouring the RTL text in green, just to make things super clear.

I put together a simple .Rmd file to test, rtl.Rmd, rendered it into a message and then dispatched.

envelope() %>%
  subject("Right-to-Left Text") %>%
  render("rtl.Rmd", css_files = "rtl.css")
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The extra CSS is included via the css_files parameter.

๐Ÿšจ If you want this to work nicely on Gmail then youโ€™ll also need to set include_css = c("rmd", "highlight") because Gmail doesnโ€™t currently appreciate Bootstrap CSS.

In the interests of brevity the contents of rtl.Rmd have been appended to the end of the post.

And this is what the delivered email looks like:

Having a rtl class allowed me to mix both left-to-right and right-to-left content in the same message. In reality this is a rather unlikely requirement. To use RTL for the entire message just adapt the CSS as follows:

body {
  direction: rtl;
}
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If there are other tweaks that I can make on {emayili} to ensure that it supports your requirements, please raise an issue on the repository.



The {emayili} package is developed & supported by Fathom Data.

Here are the contents of rtl.Rmd:

--------
output: html_document
--------

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{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)


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non tortor.

<div class="rtl">
ืฆื—ื•ืง ื”ืžืขื‘ื•ืจืช, ืžื”ื“ื•ื‘ื™ื ืฉืœ ื”ื›ืจื™ืช ื”ื—ื•ืคืฉื™ืช. ืžื™ ืจื•ืฆื” ืœืคืกืคืก, ืขืฆื•ื‘ ื‘ื—ืฆืจ ื”ืื—ื•ืจื™ืช, ื›ื“
ืจืš. ืขื›ืฉื™ื• ื”ื›ืื‘ ืฉืœ ื”ื›ืื‘ ื”ื•ื ืœื ื”ื›ืื‘ ืฉืœ ื”ื˜ืจื“ื”, ื”ืฆื•ืจืš ืฉืœ ืื’ืžื™ ื”ื—ืœื‘ื•ืŸ ืฉืœ ื”ืชืคื•ื–.
ืืœืžื ื˜ ื›ืœืฉื”ื•, โ€‹โ€‹ื•ื’ื ืœื ื™ืกื•ื“ ื›ื™ืžื™ ืฉืœ ื ื“ืœ"ืŸ, ืžืจืื™ืช ืขื™ืŸ ืฉืœ ืžื’ื•ื•ืŸ ื›ืœื™ ืจื›ื‘ ืœื ื—ื•ืช, ืจื’ืข
ืœืคื ื™ ื”ืกืคื“ ื”ื—ื™ื™ื. ืื ื™ืืก ื”ื•ื ืžื—ื‘ืจ ืจื›ื™ื‘ ื”ืžื—ื™ืจ. ืื™ืŸ ืคื—ื“ ืืœื ืื ืœื”ื™ื•ืช ื›ื ื™ื. ืื ื™ ื—ื™
ื‘ืžื™ื™ืกืจ ื”ืขืฆื•ื‘ ืฉืœ ื”ื›ื“ื•ืจื’ืœ ืฉืœื™, ื‘ืกืžืš ื”ื–ืŸ ื›ืžื•ื‘ืŸ. ืื‘ืœ ื”ืžืขื ื” ื•ื”ืงืฉืชื•ืช, ืื• ืงืฆื•ืช ื”ืื•ืจืงื™ื.
ืืœ ื”ืื’ื ืื• ืœืคื ื™ื•. ื”ื–ืžืŸ ืฉืœ ื”ืขืžืง ืœื•ืงื—. ืืคื™ืœื• ื”ืคื—ื“ ืžื”ืคื—ื“, ื”ืงืฉืชื•ืช ืื• ื”ืžืขื‘ื•ืจืช, ืืชืช
ื”ืื™ื ื˜ืจื ื˜.
</div>

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{r pressure, out.width="50%", fig.cap="ื›ื™ืชื•ื‘ ื“ืžื•ืช", fig.class="rtl"}
par(mar = c(5, 4, 1, 1))
plot(pressure, xlab = "ื˜ึถืžืคึถึผืจึธื˜ื•ึผืจึธื”", ylab = "ืœึทื—ึทืฅ", mar = c(5, 4, 0, 2))


<div class="rtl">
ื”ืžื—ืœื” ื ื•ืฉืืช ืืช ื”ืกื‘ื™ืจื•ืช ืœืกื•ืฃ ื”ืฉื‘ื•ืข, ื•ื”ืคื—ื“ ืžื”ื›ื“ื•ืจื’ืœ ืงืฉื”. ืื‘ืœ ื”ืืจื™ื” ื•ื”ืืจื™ื” ื•ื”ื™ืœื“ื™ื
ื ืžืฆืื™ื ื‘ืžื™ื˜ื”. ื–ื” ื‘ืจื•ื˜ื‘ ืฆืจื™ืš ืœื”ื’ื™ื“. ืื‘ืœ ืžื‘ื—ื™ื ืชื•, ืฆืจื•ืช ื”ื—ื™ื™ื ืžื•ืชื™ืจื•ืช ื”ืจื‘ื” ื—ื™ื™ื,
ื”ืงืจื™ืงื˜ื•ืจื” ื–ืงื•ืงื” ืœืืจื•ืกื™ื. ืขื›ืฉื™ื• ืื ื™ ืฉื•ื ื ืืช ื”ื’ื•ืจืžื™ื, ืœื ืืช ื”ื›ืื‘ ื•ืœื ืืช ื”ืกื‘ื™ื‘ื”,
ื”ื›ื ื™ืกื” ืงืœื”. ืขื›ืฉื™ื• ื”ื›ื ื™ืกื” ืœื—ื™ื™.
</div>

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amet turpis nec, accumsan lacinia neque. Nulla facilisi.
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