Inline Tag for background color

[marplx]

I think Prawn needs an inline tag for background color like in this HTML-snippet: <span style="background: red;">text on red bg</span>.

see: http://stackoverflow.com/questions/17546552/how-to-highlight-text-with-background-in-a-table-with-prawn-prawn-to/17564534?noredirect=1#17564534

Originally I wanted to highlight some characters in an inner table.

[saihgal]

You can do so currently as follows -

Prawn::Document.generate("test.pdf") do |pdf|
  table_data = [[Prawn::Table::Cell::Text.new( pdf, [0,0], :content => "Red Background", :inline_format => true, :background_color => "ff0000"), "433"],
               [Prawn::Table::Cell::Text.new( pdf, [0,0], :content => "Green Background", :inline_format => true, :background_color => "00ff00"), "2343"],
               [Prawn::Table::Cell::Text.new( pdf, [0,0], :content => "Blue Background", :inline_format => true, :background_color => "0000ff"), "36"]]

  pdf.table(table_data,:width => 500)
end

[andre1810]

I think this is request is still open. I want to highlight characters in a text, not in an inner table.

[haslo]

I wanted to highlight inline text in a text box. Because this issue was closed without resolving it, I had to resort to ugly hacks that involve exchanging styles in the output from text_formatter.format (which gives me fragments without Prawn's styling), then a draw_text_callback with manual fill_polygon (but at this point, you don't get the style, so the check whether it's one of the to-be-highlighted fragments has to be external).

It's all very horrible, but mostly works, so maybe this code is useful for somebody:

array = text_formatter.format(translate('disclaimer').gsub("\n", ' '), [])
array = array.map do |item|
  item[:styles] = [:highlight] if item[:styles] == [:bold]
  item
end
options = {
  document: self,
  draw_text_callback: ->(text, options) {
    if do_highlight?(text) # do_highlight is custom
      with_color('ffff00') do # with_color is custom
        x_left   = options[:at][0] - 2
        x_right  = options[:at][0] + width_of(text)
        y_top    = options[:at][1] - 2
        y_bottom = options[:at][1] + height_of(text) - 2
        fill_polygon([x_left, y_top],
                     [x_right, y_top],
                     [x_right, y_bottom],
                     [x_left, y_bottom])
      end
    end
    draw_text!(text, options)
  },
}
box = ::Prawn::Text::Formatted::Box.new(array, options)
box.render

[JohnSmall]

I'm also irritated that this was closed without being resolved. Maybe there's a secret society of Prawn experts who know how to set text background colors and outsiders are not supposed to know. The lack of documentation on something that should be pretty standard is very very irritating.

And yet the manual has plenty of instances with text in boxes with different background colors. So it's clearly something the experts know how to do, but they're not telling us how to do it.

[vladiim]

Try this:

Prawn::Document.new do |pdf|
  pdf.text "Some text"

  pdf.bounding_box [pdf.bounds.left, pdf.bounds.top - 50], width: pdf.bounds.width, height: 30 do
    pdf.fill_color "FFFF00" # Yellow color
    pdf.fill_rectangle [pdf.bounds.left, pdf.bounds.top], pdf.bounds.width, pdf.bounds.height
    pdf.fill_color "000000" # Reset to default color
    pdf.text "Text in box", align: :center, valign: :center, size: 12
  end
end.render