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97 lines
3.2 KiB
ReStructuredText
97 lines
3.2 KiB
ReStructuredText
Launching programs in new windows/tabs
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========================================
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.. program:: launch
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|kitty| has a :code:`launch` action that can be used to run arbitrary programs
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in news windows/tabs. It can be mapped to user defined shortcuts in kitty.conf.
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It is very powerful and allows sending the contents of
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the current window to the launched program, as well as many other options.
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In the simplest form, you can use it to open a new kitty window running the
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shell, as shown below::
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map f1 launch
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To run a different program simply pass the command line as arguments to
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launch::
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map f1 launch vim path/to/some/file
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To open a new window with the same working directory as the currently
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active window::
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map f1 launch --cwd=current
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To open the new window in a new tab::
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map f1 launch --type=tab
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To pass the contents of the current screen and scrollback to the started process::
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map f1 launch --stdin-source=@screen_scrollback less
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There are many more powerful options, refer to the complete list below.
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The piping environment
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--------------------------
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When using :option:`launch --stdin-source`, the program to which the data is
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piped has a special environment variable declared, ``KITTY_PIPE_DATA`` whose
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contents are::
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KITTY_PIPE_DATA={scrolled_by}:{cursor_x},{cursor_y}:{lines},{columns}
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where ``scrolled_by`` is the number of lines kitty is currently scrolled by,
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``cursor_(x|y)`` is the position of the cursor on the screen with ``(1,1)``
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being the top left corner and ``{lines},{columns}`` being the number of rows
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and columns of the screen.
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Special arguments
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-------------------
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There are a few special placeholder arguments that can be specified as part of
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the command line. Namely ``@selection`` which is replaced by the current
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selection and ``@active-kitty-window-id`` which is replaced by the id of the
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currently active kitty window. For example::
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map f1 launch my-program @active-kitty-window-id
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Watching launched windows
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---------------------------
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The :option:`launch --watcher` option allows you to specify python functions
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that will be called at specific events, such as when the window is resized or
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closed. Simply specify the path to a python module that specifies callback
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functions for the events you are interested in, for example:
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.. code-block:: python
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def on_resize(boss, window, data):
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# Here data will contain old_geometry and new_geometry
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def on_close(boss, window, data):
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# called when window is closed, typically when the program running in
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# it exits.
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Every callback is passed a reference to the global ``Boss`` object as well as
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the ``Window`` object the action is occurring on. The ``data`` object is
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mapping that contains event dependent data. Some useful methods and attributes
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for the ``Window`` object are: ``as_text(as_ans=False, add_history=False,
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add_wrap_markers=False, alternate_screen=False)`` with which you can get the
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contents of the window and its scrollback buffer. Similarly,
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``window.child.pid`` is the PID of the processes that was launched
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in the window and ``window.id`` is the internal kitty ``id`` of the
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window.
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Syntax reference
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------------------
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.. include:: /generated/launch.rst
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