Next: Active Display Table, Up: Display Tables
A display table is actually a char-table (see Char-Tables) with
display-table
as its subtype.
This creates and returns a display table. The table initially has
nil
in all elements.
The ordinary elements of the display table are indexed by character
codes; the element at index c says how to display the character
code c. The value should be nil
or a vector of glyph
values (see Glyphs). If an element is nil
, it says to
display that character according to the usual display conventions
(see Usual Display).
If you use the display table to change the display of newline characters, the whole buffer will be displayed as one long “line.”
The display table also has six “extra slots” which serve special
purposes. Here is a table of their meanings; nil
in any slot
means to use the default for that slot, as stated below.
For example, here is how to construct a display table that mimics the
effect of setting ctl-arrow
to a non-nil
value:
(setq disptab (make-display-table)) (let ((i 0)) (while (< i 32) (or (= i ?\t) (= i ?\n) (aset disptab i (vector ?^ (+ i 64)))) (setq i (1+ i))) (aset disptab 127 (vector ?^ ??)))
This function returns the value of the extra slot slot of display-table. The argument slot may be a number from 0 to 5 inclusive, or a slot name (symbol). Valid symbols are
truncation
,wrap
,escape
,control
,selective-display
, andvertical-border
.
This function stores value in the extra slot slot of display-table. The argument slot may be a number from 0 to 5 inclusive, or a slot name (symbol). Valid symbols are
truncation
,wrap
,escape
,control
,selective-display
, andvertical-border
.