PDF utilities

Usage

pdf_info(pdf, opw = "", upw = "")

pdf_text(pdf, opw = "", upw = "")

pdf_data(pdf, font_info = FALSE, opw = "", upw = "")

pdf_fonts(pdf, opw = "", upw = "")

pdf_attachments(pdf, opw = "", upw = "")

pdf_toc(pdf, opw = "", upw = "")

pdf_pagesize(pdf, opw = "", upw = "")

Arguments

pdf

file path or raw vector with pdf data

opw

string with owner password to open pdf

upw

string with user password to open pdf

font_info

if TRUE, extract font-data for each box. Be careful, this requires a very recent version of poppler and will error otherwise.

Details

The pdf_text function renders all textboxes on a text canvas and returns a character vector of equal length to the number of pages in the PDF file. On the other hand, pdf_data is more low level and returns one data frame per page, containing one row for each textbox in the PDF.

Note that pdf_data requires a recent version of libpoppler which might not be available on all Linux systems. When using pdf_data in R packages, condition use on poppler_config()$has_pdf_data which shows if this function can be used on the current system.

Poppler is pretty verbose when encountering minor errors in PDF files, in especially pdf_text. These messages are usually safe to ignore, use suppressMessages to hide them altogether.

See also

Examples

# Just a random pdf file
file <- system.file("examples", "recipes.pdf", package = "cpp11poppler")
info <- pdf_info(file)
text <- pdf_text(file)
fonts <- pdf_fonts(file)
files <- pdf_attachments(file)