Feature: preview window

[BartSte]

Hey @wfxr,

Thanks for this repo. I use it everyday.

I created a fork where I added a preview window. Below I'll explain how it works. If you are interested, I can make a pull request such that it can be added to this repo. I tried to make it so that it is backwards compatible with the default configurations + it is turned off by default. In order to create the preview window (efficiently) I needed to extract the line numbers of the matches, using grep -n. This explains the changes that were made in the regexes. I created a separate script called preview.sh that handles the preview window.

Below you'll find a piece of documentation that I added to the README of my fork:

This is a fork of wfxr/tmux-fzf-url with
a set of features added to it as is explained below. The goal is to keep this
repo up-to-date with the original one, and extend it with new features were
possible.

The following features have been added to this fork:

• preview window: a preview window can be enabled that shows the content of
  the tmux buffer. The selected fzf line will be highlighted in the preview
  window. The preview window is disabled by default, and can be enabled by
  setting:

  set -g @fzf-url-fzf-preview true

  Note that it may be desirable to set a custom sort command, as is explained
  below.

• sort command: after searching the tmux buffer, the results are presented
  in the following format: line_number:match. Here line_number is the line
  number in the tmux buffer, and match is the match. Before passing them to
  fzf, any duplicates are removed by using the sort -u command. Next, they are
  fed to a command that can be specified by the user. By default, the command is

  set -g @fzf-url-sort-cmd "sort -u -t: -k2"

  which means that only the match part is used for sorting this time, instead
  of the entire line. It will remove any duplicates, even if the line_number
  part is different. This will limit the number of lines that are shown in the
  fzf window, and will make it easier to find the desired line. However, when
  using the preview window, it may be desirable to display all the lines, such
  that you can scroll through them. In this case, the following may be more
  suitable:

  set -g @fzf-url-sort-cmd "sort -n"

  This will only sort the line_number part, and will not remove any
  duplicates.

[sproclavism]

Awesome job Bart, this is exactly what I needed.

By the way, as the newest (most relevant) links in a terminal would be at the bottom, passing an extra sorting option -r to reverse results works nicely.

[BartSte]

Thanks! Good to hear it is useful for you. I added some more changes to my fork and eventually moved it to a new repo called tmux-fzf-open, since it started to deviate too much from the original project. Maybe it will be of interest for you as wel.