Provided by: xcb_2.4-4.3_amd64 
NAME
xcb - X Cut Buffers - Pigeon holes for your cut and paste selections.
SYNOPSIS
xcb [Xt option] [-l layout] [-n count] [-p|-s|-S list] [-r count]
DESCRIPTION
Xcb provides easy access to the cut buffers built into every X server. It allows the
buffers to be manipulated either via the command line, or with the mouse in a point and
click manner. The buffers can be used as holding pens to store and retrieve arbitrary
data fragments. Any number of cut buffers may be created, so any number of different
pieces of data can be saved and recalled later. By default, 8 cut buffers are created.
The program is designed primarily for use with textual data.
Xcb has two modes of operation. Normally xcb provides an array of windows on your
display, one per cut buffer, tiled horizontally, vertically, or in some user specified
layout. Each window displays the contents of its respective cut buffer. Data can be cut
from and pasted to the windows in a similar manner to xterm. The buffers can also be
rotated.
In task mode, xcb lets you access the cut buffers from the command line. Cut buffers can
be loaded from stdin, copied or concatenated to stdout, loaded using the current PRIMARY
selection, or rotated an arbitrary number of positions. In this mode of operation, xcb
performs the requested task and then exits. It does not create any windows and has no
interaction with the mouse or keyboard.
OPTIONS
Xcb supports the full set of X Toolkit Intrinsics options, as well as those listed below.
Xcb options can appear in any order. The presence of the -p, -r, -s or -S options causes
xcb to execute in task mode, described above.
-l layout
This option controls the geometry arrangement of xcb's subwindows. It is the
command line equivalent of the .layout resource, described below.
-n count
Create count cut buffers. Count can be any integer greater than zero. This option
is the command line equivalent of the .bufferCount resource, described below.
-u Use utf-8 instead of the current locale settings when executing in task mode and
doing I/O.
-V Print the xcb release version number and exit immediately.
-p list
Print the contents of the listed buffer(s) on stdout. The buffered data is printed
exactly as it is stored in the server. Selecting two or more buffers has the
effect of concatenating the data on stdout. The cut buffers are numbered from 0...
onwards. The list can be either a single digit, a comma separated list of digits,
a range of the form m-n, or some combination of lists and ranges. The buffers are
printed in listed order, so repeated numbers in the list can be used to duplicate
buffer contents.
-r count
Rotate the buffers by count positions. Count can be any integer, positive or
negative. This option may be used in conjunction with the -n count option to
rotate a specific number of buffers. If the -n option is not used, xcb will rotate
the number of buffers given by the .bufferCount resource.
-s list
Store the data from stdin in the listed buffer(s). If the list refers to two or
more buffers, the input data is duplicated in each buffer. Refer to the -p option
for the definition of a list.
-S list
Store the current PRIMARY selection data in the listed buffer(s). The data is
converted to a string representation. If the list refers to two or more buffers,
the PRIMARY selection is duplicated in each buffer. Refer to the -p option for the
definition of a list. Under the -S option xcb waits for the nominated cut buffer's
contents to change before exiting. If no change is detected within 3 seconds, xcb
exits with a non-zero return code.
WIDGETS and RESOURCES
The xcb widget hierarchy consists of a collection of custom buffer widgets, one per cut
buffer. In the Athena version of the program, these buffer widgets are all contained
within a single Athena form widget. In the Motif version of the program, they are each
enclosed by Motif frame widgets, and the frame widgets are all contained within a single
Motif RowColumn widget.
The names of the buffer widgets are "buffer0", "buffer1", "buffer2", .... etc., and their
class name is "Buffer". Each buffer widget supports all the standard core widget
resources, plus the .foreground and .fontSet resources.
Application wide resources are as follows:
.bufferCount (default value 8)
This is the number of buffer widgets to create.
Any number of widgets (greater than zero) can be created.
.layout (default value "h")
Only the first character of the resource value is significant.
This is the geometry arrangement to apply in the container widget.
The layout can be "h" (horizontal), "v" (vertical), or some
other value to disable the inbuilt geometry code and specify
the layout via your X resources. An example is provided in the
application default resources file.
EVENTS and TRANSLATIONS
Xcb's input semantics are coded into a Toolkit translation table. The default bindings
have been chosen to conform with the default configuration of other cut and paste clients,
such as xterm. The bindings may be altered or overridden according to your needs. The
actions functions provided by xcb are:-
cut() causes the contents of the chosen cut buffer to become
the PRIMARY selection. The window contents, if any,
are highlighted, and can then be pasted into other
cut buffers or applications.
paste() causes the value of the PRIMARY selection to be
converted into text and pasted into the chosen cut
buffer, overwriting any previous buffer contents.
If no PRIMARY selection is present, xcb pastes
the contents of cut buffer zero into the chosen buffer.
clear() clears the chosen cut buffer.
rotate(NN) rotates the cut buffers by NN positions. NN may
be any positive or negative number.
refresh() causes the cut buffer window to be cleared and redrawn.
selreq() this action function handles paste requests
from other clients, or other xcb windows.
It should always be bound to SelectionRequest events.
selclear() this action function responds to the loss of
ownership of the PRIMARY selection property.
It should always be bound to SelectionClear events.
quit() causes xcb to terminate.
The default bindings are as follows:-
<Btn1Down>: cut() \n\
Shift <Btn2Down>: clear() \n\
<Btn2Down>: paste() \n\
Shift <Btn3Down>: rotate(-1) \n\
<Btn3Down>: rotate(1) \n\
<Key>Left: rotate(-1) \n\
<Key>Right: rotate(1) \n\
<Key>Up: rotate(-1) \n\
<Key>Down: rotate(1) \n\
<Key>q: quit() \n\
<SelReq>: selreq() \n\
<SelClr>: selclear()
EXAMPLES
The following are some examples of xcb task mode usage:-
xcb -s 0-7 < /dev/null
This clears the first 8 cut buffers in your server.
echo "G'day." | xcb -display bigears:0.0 -s 1,3,5,7
This loads the string "G'day." into four of the cut buffers on the display "bigears".
xsendevent -win buffer5 '<Btn1Down>'
This uses the program xsendevent to send a synthetic mouse click event to an xcb
subwindow, thereby making that window the owner of the PRIMARY selection.
ls `xcb -p 2,3`
This produces a listing of all the files named in cut buffers 2 and 3.
xcb -p 0-7 | xcb -s 0
This concatenates the values in the first 8 cut buffers, and places the result back in cut
buffer zero.
xcb -S 0 && xcb -p 0
The first command copies the current PRIMARY selection into the first cut buffer. If the
copy succeeds, then the second command prints that data on stdout.
for i in 0 1 2 3 4 5 6 7
do
xcb -p $i > $HOME/.xcb/$i
done
for i in 0 1 2 3 4 5 6 7
do
xcb -s $i < $HOME/.xcb/$i
done
This first loop saves the contents of each of the cut buffers in a separate file under
your home directory. The second loop restores the cut buffer contents from those files.
When placed in your .logout and .login scripts respectively, the commands are a simple
method of preserving your cut buffers across login sessions.
function g {
echo "$1\\c" | xcb -s 7
grep "$@"
}
function vg {
vi +/`xcb -p 7` "$@"
}
These two shell functions exemplify a simple mechanism for saving and reusing regular
expressions. The first function saves the regex used for grep-ing into cut buffer 7. The
second function reuses the most recent grep regex as a search command in vi. There is
considerable scope for expanding and improving these ideas.
SEE ALSO
xterm(1), xcutsel(1), xclipboard(1), xprop(1)
Athena Widget Set - C Language Interface
Motif Programmers Reference Guide
AUTHORS
Current Maintainer (I18n version)
Marc Lehmann
E-mail: pcg@goof.com
Original Author
Farrell McKay
E-mail: Farrell.McKay@mpx.com.au
XView modifications provided by Danny Vanderryn
E-mail: dvanderr@us.oracle.com
COPYRIGHT
Copyright (C) 1992,1993,1994 by Farrell McKay.
Permission to use, copy, modify, and distribute this software and its documentation for
any purpose and without fee is hereby granted, provided that the above copyright notice
appears in all copies and that both that copyright notice and this permission notice
appear in supporting documentation. This software is provided "as is" without express or
implied warranty.
BUGS :-)
Xlib's underlying protocol for moving selection data between client and server can
sometimes be slow, depending on the amount of data involved. Do not expect fast
performance if your selections are big or you want to store big files in your cut buffers!
("big" means, say, over 10k bytes - but your mileage may vary).