After something is copied to clipboard (using ctrl+c) I want a script (bash, python or any other language) to automatically detect that new entry is added to clipboard, change it's content and put it back to clipboard so when I paste it I get the modified text. The script should constantly run in background and monitor the clipboard for changes.

The following script describes the modification that is needed :
Source : https://superuser.com/questions/796292/is-there-an-efficient-way-to-copy-text-from-a-pdf-without-the-line-breaks


# title: copy_without_linebreaks
# author: Glutanimate (github.com/glutanimate)
# license: MIT license

# Parses currently selected text and removes 
# newlines that aren't preceded by a full stop


ModifiedText="$(echo "$SelectedText" | \
    sed 's/\.$/.|/g' | sed 's/^\s*$/|/g' | tr '\n' ' ' | tr '|' '\n')"

#   - first sed command: replace end-of-line full stops with '|' delimiter and keep original periods.
#   - second sed command: replace empty lines with same delimiter (e.g.
#     to separate text headings from text)
#   - subsequent tr commands: remove existing newlines; replace delimiter with
#     newlines
# This is less than elegant but it works.

echo "$ModifiedText" | xsel -bi

I do not want to use shortcut key binding to run the script.


Credit goes to Kenn.

I modified the script to my requirements and added the function to detect clipboard copy event and modify it's contents.

Source : https://github.com/SidMan2001/Scripts/tree/master/PDF-Copy-without-Linebreaks-Linux

Remove Line Breaks when copying text from PDF (Linux) :

This bash script removes line breaks when copying text from PDF. It works for both Primary Selection and Clipboard of linux.


# title: copy_without_linebreaks
# author: Glutanimate (github.com/glutanimate)
# modifier: Siddharth (github.com/SidMan2001)
# license: MIT license

# Parses currently selected text and removes 
# newlines

while ./clipnotify;
  CopiedText="$(xsel -b)"
  if [[ $SelectedText != *"file:///"* ]]; then
    ModifiedTextPrimary="$(echo "$SelectedText" | tr -s '\n' ' ')"
    echo -n "$ModifiedTextPrimary" | xsel -i
  if [[ $CopiedText != *"file:///"* ]]; then
    ModifiedTextClipboard="$(echo "$CopiedText" | tr -s '\n' ' '  )"
    echo -n "$ModifiedTextClipboard" | xsel -bi

Dependencies :

  1. xsel
    sudo apt-get install xsel
  2. clipnotify (https://github.com/cdown/clipnotify)
    You can use the pre-compiled clipnotify provided in the repository or compile yourself.

To compile clipnotify yourself :
sudo apt install git build-essential libx11-dev libxtst-dev
git clone https://github.com/cdown/clipnotify.git
cd clipnotify
sudo make

To USE :

  1. Download this repository as zip or copy and paste the script in a text editor and save it as copy_without_linebreaks.sh.
  2. Make sure that script and clipnotify (downloaded or precompiled) are in same folder.
  3. Open terminal in script's folder and set permission
    chmod +x "copy_without_linebreaks.sh"
  4. Double click the script or run by entering in terminal :
  5. Copy text in pdf and paste it anywhere. Lines breaks will be removed.
  • Please click grey check mark next to your answer in two days time. – WinEunuuchs2Unix Aug 20 at 17:22

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