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Two kinds of tab-like action are provided in Picture mode. Use
M-<TAB> (picture-tab-search) for context-based tabbing.
With no argument, it moves to a point underneath the next “interesting”
character that follows whitespace in the previous nonblank line. “Next”
here means “appearing at a horizontal position greater than the one point
starts out at.” With an argument, as in C-u M-<TAB>, this command
moves to the next such interesting character in the current line.
M-<TAB> does not change the text; it only moves point.
“Interesting” characters are defined by the variable
picture-tab-chars, which should define a set of characters. The
syntax for this variable is like the syntax used inside of ‘[…]’
in a regular expression—but without the ‘[’ and the ‘]’. Its
default value is "!-~".
<TAB> itself runs picture-tab, which operates based on the
current tab stop settings; it is the Picture mode equivalent of
tab-to-tab-stop. Normally it just moves point, but with a numeric
argument it clears the text that it moves over.
The context-based and tab-stop-based forms of tabbing are brought together
by the command C-c <TAB> (picture-set-tab-stops). This
command sets the tab stops to the positions which M-<TAB> would
consider significant in the current line. The use of this command, together
with <TAB>, can get the effect of context-based tabbing. But
M-<TAB> is more convenient in the cases where it is sufficient.
It may be convenient to prevent use of actual tab characters in pictures.
For example, this prevents C-x <TAB> from messing up the picture.
You can do this by setting the variable indent-tabs-mode to
nil.
Ce document a été généré par Eric Reinbold le 23 Février 2009 en utilisant texi2html 1.78.