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Support right-align in mode-line

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* lisp/bindings.el (mode-line-right-align-edge):  New custom
variable, controls where `mode-line-format-right-align' should
align to.
(mode-line-format-right-align):  New function.  If the symbol
`mode-line-format-right-align' appears in `mode-line-format',
then return return a padding string which aligns everything
after that symbol to the right.  Padding width is altered with
the display property and depends on the value of
`mode-line-right-align-edge'.
(mode-line-format-right-align):  New variable.  Convenience
definition for including right alignment in `mode-line-format'.
* doc/lispref/modes.texi (Mode Line Variables):  Document new
alignment functionality and user option.  (Bug#62606)
This commit is contained in:
Hugo Heagren 2023-04-01 22:27:25 +01:00 • committed by Eli Zaretskii
parent 6295d7abdd
commit c296bcc6c4
3 changed files with 80 additions and 0 deletions
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10
doc/lispref/modes.texi
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@ -2275,6 +2275,16 @@ current buffer is remote.
@defvar mode-line-client
This variable is used to identify @code{emacsclient} frames.
@end defvar
@defvar mode-line-format-right-align
Anything following this symbol in @code{mode-line-format} will be
right-aligned.
@end defvar
@defvar mode-line-right-align-edge
This variable controls exactly @code{mode-line-format-right-align}
aligns content to.
@end defvar
The following three variables are used in @code{mode-line-modes}: