Sha256: e81158845ffd7e7b2273ebd7e21ca51e6968c3efd4b1d676080b841041a8268a
Contents?: true
Size: 1.06 KB
Versions: 169
Compression:
Stored size: 1.06 KB
Contents
require 'English'
module PgEngine
class PdfPreviewGenerator
def open_tempfile
FileUtils.mkdir_p('tmp')
tempfile = Tempfile.open('PgEnginePdfPreview-', 'tmp')
begin
yield tempfile
ensure
tempfile.close
tempfile.unlink
end
end
def capture(*argv, to:)
to.binmode
open_tempfile do |err|
IO.popen(argv, err:) { |out| IO.copy_stream(out, to) }
err.rewind
unless $CHILD_STATUS.success?
raise "#{argv.first} failed (status #{$CHILD_STATUS.exitstatus}): #{err.read.to_s.chomp}"
end
end
to.rewind
end
def draw(*argv)
open_tempfile do |file|
capture(*argv, to: file)
yield file
end
end
def run(pdf_string)
open_tempfile do |tmp_pdf_file|
tmp_pdf_file.binmode
tmp_pdf_file.write pdf_string
tmp_pdf_file.close
draw 'pdftoppm', '-singlefile', '-cropbox', '-r', '72', '-png', tmp_pdf_file.path do |file|
return file.read
end
end
end
end
end
Version data entries
169 entries across 169 versions & 1 rubygems