highlight_col: Create a highlight color for a html style attribute

In tokenbrowser: Create Full Text Browsers from Annotated Token Lists

Description

Designed to be used together with the attr_style function. The return value can directly be used to set the color in an html tag attribute (e.g., color, background-color)

Usage

highlight_col(value, col = "yellow")

Arguments

value	Either a logical vector or a numeric vector with values between 0 and 1. If a logical vector is used, then tokens with TRUE will be highlighted (with the color specified in pos_col). If a numeric vector is used, the value determines the alpha (transparency), with 0 being fully transparent and 1 being fully colored.
col	The color used to highlight

Value

The string used to specify a color in an html tag attribute

Examples

highlight_col(c(NA, 0, 0.1,0.5, 1))

## used in combination with attr_style()
attr_style(color = highlight_col(c(NA, 0, 0.1,0.5, 1)))

## note that for background-color you need inversed quotes to deal
## with the hyphen in an argument name
attr_style(`background-color` = highlight_col(c(NA, 0, 0.1,0.5, 1)))

tag_attr(class = c(1, 2),
         style = attr_style(`background-color` = highlight_col(c(FALSE,TRUE))))

tokenbrowser documentation built on Oct. 23, 2020, 6:54 p.m.