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New variable 'expose-hidden-buffer' (Bug#75828)

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* src/frame.c (make_frame): Handle 'expose-hidden-buffer'.
(expose-hidden-buffer): New variable to handle hidden buffers.
* src/buffer.c (Fother_buffer): Mention that it does not return
a hidden buffer.
* lisp/frame.el (make-frame): In doc-string describe handling
of hidden buffers.
* doc/lispref/frames.texi (Creating Frames): Explain handling
of hidden buffers in description of 'make-frame'.
This commit is contained in:
Martin Rudalics 2025-01-28 16:59:45 +01:00
parent c400ac680f
commit 7f01dd8906
4 changed files with 33 additions and 4 deletions
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19
src/frame.c
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@ -1094,8 +1094,9 @@ make_frame (bool mini_p)
{
Lisp_Object buf = Fcurrent_buffer ();
/* If current buffer is hidden, try to find another one. */
if (BUFFER_HIDDEN_P (XBUFFER (buf)))
/* If the current buffer is hidden and shall not be exposed, try to find
another one. */
if (BUFFER_HIDDEN_P (XBUFFER (buf)) && NILP (expose_hidden_buffer))
buf = other_buffer_safely (buf);
/* Use set_window_buffer, not Fset_window_buffer, and don't let
@ -7164,6 +7165,20 @@ making the child frame unresponsive to user actions, the default is to
iconify the top level frame instead. */);
iconify_child_frame = Qiconify_top_level;
DEFVAR_LISP ("expose-hidden-buffer", expose_hidden_buffer,
doc: /* Non-nil means to make a hidden buffer more visible.
A buffer is considered "hidden" if its name starts with a space. By
default, many functions disregard hidden buffers. In particular,
`make-frame' does not show the current buffer in the new frame's
selected window if that buffer is hidden. Rather, `make-frame' will
show a buffer that is not hidden instead.
If this variable is non-nil, it will override the default behavior and
allow `make-frame' to show the current buffer even if its hidden. */);
expose_hidden_buffer = Qnil;
DEFSYM (Qexpose_hidden_buffer, "expose-hidden-buffer");
Fmake_variable_buffer_local (Qexpose_hidden_buffer);
DEFVAR_LISP ("frame-internal-parameters", frame_internal_parameters,
doc: /* Frame parameters specific to every frame. */);
#ifdef HAVE_X_WINDOWS