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docs/userguide: document the new assign syntax

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Michael Stapelberg 2011-09-11 22:15:05 +01:00
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@ -478,37 +478,59 @@ configuration file and run it before starting i3 (for example in your
[[assign_workspace]]
Specific windows can be matched by window class and/or window title. It is
recommended that you match on window classes instead of window titles whenever
possible because some applications first create their window, and then worry
about setting the correct title. Firefox with Vimperator comes to mind. The
window starts up being named Firefox, and only when Vimperator is loaded does
the title change. As i3 will get the title as soon as the application maps the
To automatically make a specific window show up on a specific workspace, you
can use an *assignment*. You can match windows by using any criteria,
see <<command_criteria>>. It is recommended that you match on window classes
(and instances, when appropriate) instead of window titles whenever possible
because some applications first create their window, and then worry about
setting the correct title. Firefox with Vimperator comes to mind. The window
starts up being named Firefox, and only when Vimperator is loaded does the
title change. As i3 will get the title as soon as the application maps the
window (mapping means actually displaying it on the screen), you’d need to have
to match on 'Firefox' in this case.
You can prefix or suffix workspaces with a `~` to specify that matching clients
should be put into floating mode. If you specify only a `~`, the client will
not be put onto any workspace, but will be set floating on the current one.
*Syntax*:
------------------------------------------------------------
assign ["]window class[/window title]["] [→] [workspace]
assign <criteria> [→] workspace
------------------------------------------------------------
*Examples*:
----------------------
assign urxvt 2
assign urxvt → 2
assign urxvt → work
assign "urxvt" → 2
assign "urxvt/VIM" → 3
assign "gecko" → 4
# Assign URxvt terminals to workspace 2
assign [class="URxvt"] 2
# Same thing, but more precise (exact match instead of substring)
assign [class="^URxvt$"] 2
# Same thing, but with a beautiful arrow :)
assign [class="^URxvt$"] → 2
# Assignment to a named workspace
assign [class="^URxvt$"] → work
# Start urxvt -name irssi
assign [class="^URxvt$" instance="^irssi$"] → 3
----------------------
Note that the arrow is not required, it just looks good :-). If you decide to
use it, it has to be a UTF-8 encoded arrow, not `->` or something like that.
To get the class and instance, you can use +xprop+. After clicking on the
window, you will see the following output:
*xwininfo*:
-----------------------------------
WM_CLASS(STRING) = "irssi", "URxvt"
-----------------------------------
The first part of the WM_CLASS is the instance ("irssi" in this example), the
second part is the class ("URxvt" in this example).
Should you have any problems with assignments, make sure to check the i3
logfile first (see http://i3wm.org/docs/debugging.html). It includes more
details about the matching process and the window’s actual class, instance and
title when starting up.
=== Automatically starting applications on i3 startup
By using the +exec+ keyword outside a keybinding, you can configure