Commit 4676d6f3 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

(Special Properties): Clarify line-spacing and line-height.

parent 4d4d2d07
2004-09-28 Richard M. Stallman <rms@gnu.org>
* text.texi (Special Properties): Clarify line-spacing and line-height.
* searching.texi (Regexp Search): Add looking-back.
2004-09-25 Luc Teirlinck <teirllm@auburn.edu>
* display.texi: Correct typos.
......
......@@ -2989,12 +2989,11 @@ for possible pointer shapes.
@item line-spacing
@kindex line-spacing @r{(text property)}
A newline can have a @code{line-spacing} text or overlay property
that controls the height of the corresponding display line.
@c ??? Which display line is "corresponding"?
The @code{line-spacing} property overrides the default frame line
spacing and the buffer local @code{line-spacing} variable. We will
call the property value @var{line-spacing}.
A newline can have a @code{line-spacing} text or overlay property that
controls the height of the display line ending with that newline. The
property value overrides the default frame line spacing and the buffer
local @code{line-spacing} variable. We will call the property value
@var{line-spacing}.
If @var{line-spacing} is a positive integer, the value specifies
additional vertical space, below the display line, in pixels.
......@@ -3012,18 +3011,13 @@ is equivalent to using the @code{line-height} property.
@item line-height
@kindex line-height @r{(text property)}
A newline can have a @code{line-height} text or overlay property that
controls the total height of the corresponding display line.
@c ??? Which display line is "corresponding"?
controls the total height of the display line ending in that newline.
We will call the property value @var{line-height}.
If @var{line-height} is 0, the newline does not contribute to the
height of the display row; instead the height of the newline glyph is
reduced.
@c ??? That is not clear. Reduced how much?
In that case, any @code{line-spacing} property on
this newline is ignored. This can be used to tile small images or
image slices without adding blank areas between the images.
@c ??? Precisely which of these features does ``this'' mean?
If @var{line-height} is 0, the height of the line is determined solely
from its contents; nothing is added. Any @code{line-spacing} property
on this newline is ignored. This case is useful for tiling small
images or image slices without adding blank areas between the images.
If @var{line-height} is a positive integer, the value specifies the
minimum line height in pixels. The line's ascent height is
......
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