Emacs: fido-mode (Minibuffer Name Completion)

What is fido-mode

• fido-mode is a feature that does name completion in Minibuffer
• New in Emacs 27 (date 2020)
• It emulates ido mode behavior.
• (fido is a nickname for “fake-ido”)

What is fido-vertical-mode

• fido-vertical-mode is like fido-mode, but show choices vertically.
• New in Emacs 28 (date 2022)

Relation to icomplete-mode

• both fido-mode and fido-vertical-mode are part of icomplete-mode.
• They first turn on icomplete-mode.

Using fido-mode and fido-vertical-mode

fido-mode

• Activates icomplete-mode, but use flex match. That is, you can type any char that are contained in the name.
• No need to press Tab.
• Press Enter selects the first matched item and exit.

fido-vertical-mode

Activates fido-mode, but show choices vertically.

Difference between fido-mode and icomplete-mode

• Emacs: fido-mode vs icomplete-mode

🛑 WARNING: Fido Mode, Copy or Rename File in Dired Overwrites

with fido mode on, when creating a file, or copying a file, etc in dired , be sure to press Ctrl+d to select current dir. Otherwise, if you press Enter, it selects current file choice and prompt to override file.

fido-vertical-mode keys

Ctrl+d

do not use any suggestion, but use the current typed. This is important, when you want to create a new file, dir, or dired for copy file, rename file. (corresponding command is badly named icomplete-fido-delete-char)

Enter

Select current choice

Alt+j

icomplete-fido-exit “Attempt to exit minibuffer immediately with current input.”

Alt+t

icomplete-force-complete “Complete the icomplete minibuffer.”

Ctrl+j

icomplete-force-complete-and-exit “Complete the minibuffer with the longest possible match and exit. Use the first of the matches if there are any displayed, and use the default otherwise.”

→

next choice

←

Prev choice

↓

next choice

↑

Prev choice

Ctrl+s

next choice

Ctrl+r

Prev choice

Ctrl+.

next choice

Ctrl+,

Prev choice

Ctrl+n

next choice

Ctrl+p

Prev choice

Alt+<

icomplete-vertical-goto-first

Alt+>

icomplete-vertical-goto-last