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vim-patch:8.1.1372: when evaluating 'statusline' the current window is unknown

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Problem:    When evaluating 'statusline' the current window is unknown.
            (Daniel Hahler)
Solution:   Set "g:actual_curwin" for %{} items.  Set "g:statusline_winid"
            when evaluationg %!. (closes vim/vim#4406, closes vim/vim#3299)
1c6fd1e100
This commit is contained in:
Jan Edmund Lazo
2020-06-25 21:07:49 -04:00
parent 43a2e5fe4b
commit edaff441de
4 changed files with 68 additions and 28 deletions
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22
runtime/doc/options.txt
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@@ -3947,6 +3947,8 @@ A jump table for the options with a short description can be found at |Q_op|.
When on allow some options that are an expression to be set in the
modeline. Check the option for whether it is affected by
'modelineexpr'. Also see |modeline|.
This option cannot be set from a |modeline| or in the |sandbox|, for
security reasons.
*'modelines'* *'mls'*
'modelines' 'mls' number (default 5)
@@ -5807,7 +5809,9 @@ A jump table for the options with a short description can be found at |Q_op|.
When the option starts with "%!" then it is used as an expression,
evaluated and the result is used as the option value. Example: >
:set statusline=%!MyStatusLine()
< The result can contain %{} items that will be evaluated too.
< The *g:statusline_winid* variable will be set to the |window-ID| of the
window that the status line belongs to.
The result can contain %{} items that will be evaluated too.
Note that the "%!" expression is evaluated in the context of the
current window and buffer, while %{} items are evaluated in the
context of the window that the statusline belongs to.
@@ -5936,13 +5940,15 @@ A jump table for the options with a short description can be found at |Q_op|.
become empty. This will make a group like the following disappear
completely from the statusline when none of the flags are set. >
:set statusline=...%(\ [%M%R%H]%)...
< *g:actual_curbuf*
Beware that an expression is evaluated each and every time the status
line is displayed. The current buffer and current window will be set
temporarily to that of the window (and buffer) whose statusline is
currently being drawn. The expression will evaluate in this context.
The variable "g:actual_curbuf" is set to the `bufnr()` number of the
real current buffer.
< Beware that an expression is evaluated each and every time the status
line is displayed.
*g:actual_curbuf* *g:actual_curwin*
The current buffer and current window will be set temporarily to that
of the window (and buffer) whose statusline is currently being drawn.
The expression will evaluate in this context. The variable
"g:actual_curbuf" is set to the `bufnr()` number of the real current
buffer and "g:actual_curwin" to the |window-ID| of the real current
window. These values are strings.
The 'statusline' option will be evaluated in the |sandbox| if set from
a modeline, see |sandbox-option|.