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* src/xdisp.c (Fwindow_text_pixel_size): Doc fix. (Bug#41737)

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Eli Zaretskii 2020-06-06 19:53:08 +03:00
parent d8593fd19f
commit fbd49f969e
1 changed files with 33 additions and 23 deletions
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src/xdisp.c
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@ -10401,33 +10401,43 @@ in_display_vector_p (struct it *it)
DEFUN ("window-text-pixel-size", Fwindow_text_pixel_size, Swindow_text_pixel_size, 0, 6, 0,
doc: /* Return the size of the text of WINDOW's buffer in pixels.
WINDOW must be a live window and defaults to the selected one. The
return value is a cons of the maximum pixel-width of any text line and
the maximum pixel-height of all text lines.
return value is a cons of the maximum pixel-width of any text line
and the pixel-height of all the text lines in the accessible portion
of buffer text.
This function exists to allow Lisp programs to adjust the dimensions
of WINDOW to the buffer text it needs to display.
The optional argument FROM, if non-nil, specifies the first text
position and defaults to the minimum accessible position of the buffer.
If FROM is t, use the minimum accessible position that starts a
non-empty line. TO, if non-nil, specifies the last text position and
defaults to the maximum accessible position of the buffer. If TO is t,
use the maximum accessible position that ends a non-empty line.
position to consider, and defaults to the minimum accessible position
of the buffer. If FROM is t, it stands for the minimum accessible
position that starts a non-empty line. TO, if non-nil, specifies the
last text position and defaults to the maximum accessible position of
the buffer. If TO is t, it stands for the maximum accessible position
that ends a non-empty line.
The optional argument X-LIMIT, if non-nil, specifies the maximum text
width that can be returned. X-LIMIT nil or omitted, means to use the
pixel-width of WINDOW's body; use this if you want to know how high
WINDOW should be become in order to fit all of its buffer's text with
the width of WINDOW unaltered. Use the maximum width WINDOW may assume
if you intend to change WINDOW's width. In any case, text whose
x-coordinate is beyond X-LIMIT is ignored. Since calculating the width
of long lines can take some time, it's always a good idea to make this
argument as small as possible; in particular, if the buffer contains
long lines that shall be truncated anyway.
The optional argument X-LIMIT, if non-nil, specifies the maximum X
coordinate beyond which the text should be ignored. It is therefore
also the maximum width that the function can return. X-LIMIT nil or
omitted means to use the pixel-width of WINDOW's body. This default
means text of truncated lines wider than the window will be ignored;
specify a large value for X-LIMIT if lines are truncated and you need
to account for the truncated text. Use nil for X-LIMIT if you want to
know how high WINDOW should become in order to fit all of its buffer's
text with the width of WINDOW unaltered. Use the maximum width WINDOW
may assume if you intend to change WINDOW's width. Since calculating
the width of long lines can take some time, it's always a good idea to
make this argument as small as possible; in particular, if the buffer
contains long lines that shall be truncated anyway.
The optional argument Y-LIMIT, if non-nil, specifies the maximum text
height (excluding the height of the mode- or header-line, if any) that
can be returned. Text lines whose y-coordinate is beyond Y-LIMIT are
ignored. Since calculating the text height of a large buffer can take
some time, it makes sense to specify this argument if the size of the
buffer is large or unknown.
The optional argument Y-LIMIT, if non-nil, specifies the maximum Y
coordinate beyond which the text is to be ignored; it is therefore
also the maxcomp height that the function can return (excluding the
height of the mode- or header-line, if any). Y-LIMIT nil or omitted
means consider all of the accessible portion of buffer text up to the
position specified by TO. Since calculating the text height of a
large buffer can take some time, it makes sense to specify this
argument if the size of the buffer is large or unknown.
Optional argument MODE-AND-HEADER-LINE nil or omitted means do not
include the height of the mode- or header-line of WINDOW in the return