[question] how the peek-window implemented

[jidibinlin]

Hi! Can you tell me which tech you used to implement the peek-window! Best for some implementation detail。Thankyou

[AmaiKinono]

The peek window is an overlay (citre-peek--ov). See citre-peek--mode to know how it's created.

Overlays has an after-string property. The content of the window is written to this property. See citre-peek--update-display.

citre-peek--update-display is added to post-command-hook (and is removed by citre-peek-abort) so the content is updated after every command. This is much like an immediate mode UI:

• The content of the window is completely determined by a set of internal states (variables).
• citre-peek commands update these states.
• citre-peek--update-display recalculates the content of the window based on these states.

We do have an optimization: citre-peek--content-update is t only after a citre-peek command, so if it's nil, we only update the position of the overlay and leave its content untouched.

For details you need to read the code.

[jidibinlin]

@AmaiKinono Thankyou very must!