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Code Issues Releases Activity

Support for (box . SIZE) 'cursor-type'

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This allows control of the minimum size of a masked image under
which the box cursor becomes hollow.
* buffer.c (cursor-type): Add commentary about (box . SIZE)
'cursor-type'.
* xdisp.c (get_specified_cursor_type): Check for 'cursor-type'
of the form (box . SIZE).
(get_window_cursor_type): Check masked image size for
(box . SIZE) 'cursor-type'.

* doc/emacs/display.texi (Cursor Display):
* doc/emacs/display.texi (Cursor Parameters): Add description
of (box . SIZE) 'cursor-type'.

* etc/NEWS: Mention the new (box . SIZE) 'cursor-type'.
This commit is contained in:
Zajcev Evgeny 2020-01-27 15:49:46 +03:00 committed by Eli Zaretskii
parent c4be801125
commit 63fd6c9ef0
5 changed files with 28 additions and 14 deletions
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2
doc/emacs/display.texi
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@ -1654,6 +1654,8 @@ Customization}). (The other attributes of this face have no effect;
the text shown under the cursor is drawn using the frame's background
color.) To change its shape, customize the buffer-local variable
@code{cursor-type}; possible values are @code{box} (the default),
@code{(box . @var{SIZE})} (box cursor becoming a hollow box under
masked images larger than @var{SIZE} pixels in either dimension),
@code{hollow} (a hollow box), @code{bar} (a vertical bar), @code{(bar
. @var{n})} (a vertical bar @var{n} pixels wide), @code{hbar} (a
horizontal bar), @code{(hbar . @var{n})} (a horizontal bar @var{n}

3
doc/lispref/frames.texi
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@ -2220,6 +2220,9 @@ How to display the cursor. Legitimate values are:
@table @code
@item box
Display a filled box. (This is the default.)
@item (box . @var{SIZE})
Display a filled box. However, display it as a hollow box if point is
under masked image larger than @var{SIZE} pixels in either dimension.
@item hollow
Display a hollow box.
@item nil

6
etc/NEWS
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@ -64,6 +64,12 @@ It was declared obsolete in Emacs 27.1.
* Changes in Emacs 28.1
** Support for '(box . SIZE)' cursor-type.
By default, 'box' cursor always has a filled box shape. Unless you
specify cursor-type to be '(box . SIZE)'. In such case, cursor
becomes a hollow box if the point is under masked image larger than
'SIZE' pixels in any dimension.
* Editing Changes in Emacs 28.1

3
src/buffer.c
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@ -6247,6 +6247,9 @@ Values are interpreted as follows:
t use the cursor specified for the frame
nil don't display a cursor
box display a filled box cursor
(box . SIZE) display a filled box cursor, but make it
hollow if cursor is under masked image larger than
SIZE pixels in either dimension.
hollow display a hollow box cursor
bar display a vertical bar cursor with default width
(bar . WIDTH) display a vertical bar cursor with width WIDTH

28
src/xdisp.c
View File

@ -30741,14 +30741,6 @@ get_specified_cursor_type (Lisp_Object arg, int *width)
return BAR_CURSOR;
}
if (CONSP (arg)
&& EQ (XCAR (arg), Qbar)
&& RANGED_FIXNUMP (0, XCDR (arg), INT_MAX))
{
*width = XFIXNUM (XCDR (arg));
return BAR_CURSOR;
}
if (EQ (arg, Qhbar))
{
*width = 2;
@ -30756,11 +30748,16 @@ get_specified_cursor_type (Lisp_Object arg, int *width)
}
if (CONSP (arg)
&& EQ (XCAR (arg), Qhbar)
&& RANGED_FIXNUMP (0, XCDR (arg), INT_MAX))
{
*width = XFIXNUM (XCDR (arg));
return HBAR_CURSOR;
if (EQ (XCAR (arg), Qbox))
return FILLED_BOX_CURSOR;
else if (EQ (XCAR (arg), Qbar))
return BAR_CURSOR;
else if (EQ (XCAR (arg), Qhbar))
return HBAR_CURSOR;
}
/* Treat anything unknown as "hollow box cursor".
@ -30898,12 +30895,15 @@ get_window_cursor_type (struct window *w, struct glyph *glyph, int *width,
struct image *img = IMAGE_OPT_FROM_ID (f, glyph->u.img_id);
if (img != NULL && IMAGEP (img->spec))
{
/* Arbitrarily, interpret "Large" as >32x32 and >NxN
/* Interpret "large" as >SIZExSIZE and >NxN
where SIZE is the value from cursor-type in form (box . SIZE),
where N = size of default frame font size.
This should cover most of the "tiny" icons people may use. */
So, setting cursor-type to (box . 32) should cover most of
the "tiny" icons people may use. */
if (!img->mask
|| img->width > max (32, WINDOW_FRAME_COLUMN_WIDTH (w))
|| img->height > max (32, WINDOW_FRAME_LINE_HEIGHT (w)))
|| (CONSP (BVAR (b, cursor_type))
&& img->width > max (*width, WINDOW_FRAME_COLUMN_WIDTH (w))
&& img->height > max (*width, WINDOW_FRAME_LINE_HEIGHT (w))))
cursor_type = HOLLOW_BOX_CURSOR;
}
}