---
title: "Insert copy to clipboard buttons in RMarkdown HTML documents"
author: "Romain Lesur"
date: "`r Sys.Date()`"
output:
  prettydoc::html_pretty:
    theme: hpstr
    highlight: github
  pdf_document: default
vignette: >
  %\VignetteIndexEntry{Insert copy to clipboard buttons in HTML documents}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r klippy, echo=FALSE, include=TRUE}
klippy::klippy('')
```

## Common use

The `klippy` package enhances `R Markdown` `HTML` documents with **copy to 
clipboard buttons**. You only have to paste the following chunk anywhere in 
your `Rmd` file.

Obviously, **you have to try the clipboard button in the upper left corner of this chunk!**

````{#ex .markdown .klippy}
`r ''````{r klippy, echo=FALSE, include=TRUE}
klippy::klippy()
```
````

The `klippy()` function inserts a klippy[^1] in each `R` or `markdown` code block.

## Code block selection

You can select which of the code blocks get a klippy.  
First, insert this chunk anywhere in your `Rmd` file:

````{#code-block-ex .markdown .klippy}
`r ''````{r klippy, echo=FALSE, include=TRUE}
klippy::klippy('')
```
````

Then, add the `klippy` class to a code chunk:

````{.markdown}
`r ''````{r cars, class.source='klippy'}
summary(cars)
```
````

## Engine selection

If you use other languages than `R` in your `Rmd` file, you can also add klippies 
to these code blocks.

For example, if you want to add klippies to `R` and `python` code blocks, add this 
chunk anywhere in your `Rmd` file:
````{.markdown .klippy}
`r ''````{r klippy, echo=FALSE, include=TRUE}
klippy::klippy(c('r', 'python'))
```
````

## Icon positioning

By default, `klippy` is positionned at the upper-left corner of the code chunks.
You can choose another corner with `position` argument:
````{.markdown .klippy}
`r ''````{r klippy, echo=FALSE, include=TRUE}
klippy::klippy(position = c('top', 'right'))
```
````

## Color customization

`klippy` color is the same as the links in the document. However, you can pick 
another color:
````{.markdown .klippy}
`r ''````{r klippy, echo=FALSE, include=TRUE}
klippy::klippy(color = 'darkred')
```
````

## Tooltip messages

Tooltip messages can also be adapted:
````{.markdown .klippy}
`r ''````{r klippy, echo=FALSE, include=TRUE}
klippy::klippy(tooltip_message = 'Click to copy', tooltip_success = 'Done')
```
````

## Browser Support

For supported browsers, see [`clipboard.js` documentation](https://clipboardjs.com/#browser-support).


[^1]: A klippy is a knitweaR clipboard button.