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When a line of text extends beyond the right edge of a window, Emacs can continue the line (make it “wrap” to the next screen line), or truncate the line (limit it to one screen line). The additional screen lines used to display a long text line are called continuation lines. Continuation is not the same as filling; continuation happens on the screen only, not in the buffer contents, and it breaks a line precisely at the right margin, not at a word boundary. Voir la section Filling.
On a graphical display, tiny arrow images in the window fringes indicate truncated and continued lines (voir la section Fringes). On a text terminal, a ‘$’ in the rightmost column of the window indicates truncation; a ‘\’ on the rightmost column indicates a line that “wraps.” (The display table can specify alternate characters to use for this; voir la section Display Tables).
This buffer-local variable controls how Emacs displays lines that extend
beyond the right edge of the window. The default is nil, which
specifies continuation. If the value is non-nil, then these lines
are truncated.
If the variable truncate-partial-width-windows is non-nil,
then truncation is always used for side-by-side windows (within one frame)
regardless of the value of truncate-lines.
This variable is the default value for truncate-lines, for buffers
that do not have buffer-local values for it.
This variable controls display of lines that extend beyond the right edge of
the window, in side-by-side windows (voir la section Splitting Windows). If it is
non-nil, these lines are truncated; otherwise, truncate-lines
says what to do with them.
When horizontal scrolling (voir la section Horizontal Scrolling) is in use in a window, that forces truncation.
If your buffer contains very long lines, and you use continuation to
display them, just thinking about them can make Emacs redisplay slow. The
column computation and indentation functions also become slow. Then you
might find it advisable to set cache-long-line-scans to t.
If this variable is non-nil, various indentation and motion
functions, and Emacs redisplay, cache the results of scanning the buffer,
and consult the cache to avoid rescanning regions of the buffer unless they
are modified.
Turning on the cache slows down processing of short lines somewhat.
This variable is automatically buffer-local in every buffer.
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Ce document a été généré par Eric Reinbold le 13 Octobre 2007 en utilisant texi2html 1.78.