Question

I have a rtf file.
I want to open that file using Ruby for replacing some placeholders by image.
I was looking around ruby-rtf. But it is not suitable for parsing rtf, only for creating brand new rtf.

Could anyone help me?

Answer 1

I have found solution!

First, You have to add a placeholder to your rtf file. For that you have to open rtf file with MS Word and place it in particular position. For example, your placeholder may be named like @@placeholder@@.

Second, open saved on step 1 rtf file with notepad so that to clear up a placeholder. Ms word sometimes may add “garbage” tags to your placeholder (@@pla rtlch\fcs1 \af39\afs20 \ltrch\fcs0 \b\f39\fs20\insrsid14101935\charrsi ceholder@@). You should correct it so that to get @@placeholder@@.

Third, use ruby-rtf.
At last, code for inserting image:

# using Document class of ruby-rtf plugin
document = Document.new(nil) 
image = document.image("path_to_image/check.png")

rtf_file = IO.read("path_to_rtf/my.rtf")
rtf_file.gsub!('@@placeholder@@', image.to_rtf)
File.open("#{Rails.root}/my_userdata/new_blank.rtf", "wb") {|f| f.write rtf_file }

I hope it will be helpful for someone.