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src/cmd/acme: provide info on presense or absence of undo history (#528)

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It's sometimes useful to know whether there's been editing activity
in a window. This PR adds that information to the ctl file.

Change-Id: I21a342ac636dd5c7701b3ed560e3526867329c2c
This commit is contained in:
Roger Peppe 2021-10-19 17:08:45 +01:00 • committed by GitHub
parent 7b0b2065fa
commit d0d440860f
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3 changed files with 8 additions and 5 deletions
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7
man/man4/acme.4
View file

@ -184,9 +184,10 @@ is always appended; the file offset is ignored.
.B ctl
may be read to recover the five numbers as held in the
.B index
file, described above, plus three more fields: the width of the
window in pixels, the name of the font used in the window,
and the width of a tab character in pixels.
file, described above, plus five more fields: the width of the
window in pixels; the name of the font used in the window;
the width of a tab character in pixels; a 1 if there is undo history, 0 otherwise;
a 1 if there is redo history, 0 otherwise.
Text messages may be written to
.B ctl
to affect the window.