Takes one or several dois and extracts information from Crossref, then processes them into visual citations with drop_name. Requires rcrossref > v1.1, see README for further details.

## Usage

drop_name_crossref(dois, ...)

## Arguments

dois

One or several dois to create visual citations for. If they are named, these names are used as filenames; otherwise they are generated based on authors and years.

...

Arguments passed on to drop_name

export_as

A string specifying the desired output format. For now supports PNG and HTML. Use "html" to include the 'bare' taglist (recommended for inclusion in Rmarkdown documents) or "html_full" to write a standalone .html file including <head> etc. The PNG is a screenshot of the rendered HTML via the 'webshot' package. The filename represents this two step approach on purpose. For webshot you need to install phantomJS once (see 'webshot' documentation).

output_dir

A string specifying the relative path, where the rendered output files should be stored.

max_authors

Integer number of maximum authors to print. If the number of authors exceeds this, the list is cropped accordingly.

include_qr

Character string specifying the way the QR code should be included or if no QR code should be included. 'embed' results in a stand alone <img> tag within the HTML object, other options are ignored for the time being. 'link' (default) creates a PNG of the QR code and stores it in a subfolder of the HTML file's location. The HTML <img> tag links to this file then. 'link_svg' creates a SVG of the QR code and stores it in a subfolder of the HTML file's location. The HTML <img> tag links to this file then. 'none' creates no QR code.

style

A string specifying the desired style for the visual citation. Possible values are: "modern", "classic", "clean", "fancy", "newspaper", "compact" and "none". If "compact" is given, the rendered VC contains only the last name of the first author and the publication year, next to the QR code. If "none" is given, the returned html can use a custom css file provided by the user. This custom CSS file must specify styles for <div> classes "top-row", "title-row" and "author-row". (see vignette)

path_absolute

Boolean to specify, whether the returned output path is a relative path or an absolute path.

use_xaringan

Boolean to specify if an HTML output is intended to be included in an HTML presentation (like e.g. xaringan) or not. When including the visual citation via htmltools::includeHTML(), the QR code needs to be in a subfolder relative to the rendered presentation, not relative to the visual citation.

clean_strings

Removes curly braces from titles and journal names, as they are often present in BibTeX strings, but not needed for the rendering. TRUE by default, but can be set to FALSE, if the are needed.

qr_size

Specifies the height/width of the rendered QR code in px. Default: 250px, minimum: 150px. Ignored for SVG output.

qr_color

Specifies the foreground color of the QR code as hex-string, e.g. "#00FF00"; default is black: "#000000".

qr_hyperlink

Logical. Should the QR code be a hyperlink?

vc_width

Specifies the width of the text part of the visual citation in px. This can be adjusted to accommodate e.g. untypically long or short titles. Default: 600px

## Value

A character string with the file path to the created visual citation in the specified output format.

## Examples

if (FALSE) {
drop_name_crossref(c(cite1 = "10.1126/science.169.3946.635", cite2 = "10.1111/joms.12670"))
}