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Contents
module Asciidoctor::Pdf::FormattedText
module InlineImageRenderer
module_function
# Embeds the image object in this fragment into the document in place of the
# text that was previously used to reserve space for the image in the line.
#
# If the image height is less than 1.5x the height of the surrounding text,
# it is centered vertically in the line. If the image height is greater, then
# the image is aligned to the bottom of the text.
#
# Note that render_behind is called before the text is printed.
#
# This handler is only used on the main document (not the scratch document).
#
def render_behind fragment
pdf = fragment.document
data = fragment.format_state
image_top = if data.key? :line_height_increased
# align image to bottom of line (differs from fragment.top by descender value)
fragment.bottom + data[:image_height]
else
# center image in line
fragment.top - ((fragment.height - data[:image_height]) / 2.0)
end
image_left = fragment.left + ((fragment.width - data[:image_width]) / 2.0)
case data[:image_type]
when 'svg'
# prawn-svg messes with the cursor; use float as a workaround
pdf.float do
data[:image_obj].tap {|obj| obj.options[:at] = [image_left, image_top] }.draw
end
else
pdf.embed_image data[:image_obj], data[:image_info], at: [image_left, image_top], width: data[:image_width]
end
# ...or use the public interface, loading the image again
#pdf.image data[:image_path], at: [image_left, image_top], width: data[:image_width]
# prevent any text from being written
fragment.conceal
ensure
::File.unlink data[:image_path] if data[:image_tmp]
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems