decode URIs that appear on hundreds of files.
Most of the plugins, including MIME Tools, are written to act on one file (the active window). The Find In Files dialog is about the only place that’s easy to do multi-file operations. In general, Text Editors focus on the editing of a single file.
That said, it would be possible to code up a script to do it: there are tools like the plugins PythonScript or LuaScript, or my Perl module(*) which allows external control of Notepad++, all of which could use the runPluginCommand or equivalent operation to call the MIME Tools > URL Decode menu entry. The script could easily toggle through all the open files in Notepad++, or even do the file matching itself, and then individually open each file in Notepad++, do the fixes, and then save/close the file (to prevent having hundreds of files open simultaneously).
But at that point, any of those languages (Python, Lua, Perl) have core or standard modules/libraries which can do the URL-decoding internally, without having to pester Notepad++ itself to run a plugin to do that, so it could be written in a Notepad++ -agnostic manner, without having to customize the logic and commands to use Notepad++ at all. It’s really more of a programming exercise than something specific to Notepad++. And rather than re-inventing the wheel, this StackExchange question has answers showing how to perform your task on a given file in python2, python3, sed, bash+xxd, php, perl, and awk – the question was asked from the Linux perspective, but all of those could be done in Windows as well.
We’re not actually a code-writing service, and as I said above, this is really a coding problem, not a Notepad++ -specific question. However, since it can be done “inside” Notepad++ to some extent, if I have another chunk of time a little later today, I might come back and try to do the PerlScript(*) and/or PythonScript solution
*: Footnote = The Perl module has a perlish name, officially (Win32::Mechanize::NotepadPlusPlus); but has been given the PerlScript nickname to give it balance to the PythonScript and LuaScript plugins. I am more fluent in Perl than Python; unfortunately, until I am able to bundle everything into a plugin package, it’s probably easier for standard Notepad++ users (ie, those who don’t already have Perl installed on their Windows machines) to just install PythonScript plugin to do it.
