Function: window-old-body-pixel-width

window-old-body-pixel-width is a function defined in window.c.

Signature

(window-old-body-pixel-width &optional WINDOW)

Documentation

Return old width of WINDOW's text area in pixels.

WINDOW must be a live window and defaults to the selected one.

The return value is the pixel width of WINDOW's text area after the last time window change functions found WINDOW live on its frame. It is zero if WINDOW was created after that.

Probably introduced at or before Emacs version 27.1.

Source Code

// Defined in /usr/src/emacs/src/window.c
{
  return (make_fixnum
	  (decode_live_window (window)->old_body_pixel_width));
}