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Data structures

Let's look at ~/.workgroups file:

[cl-struct-wg-session "0G3A08BU1E35GEA0-18GPMY" ...
  ([cl-struct-wg-workgroup "0G3A08D8APKR11T4-1C1G10" "Tasks" ...
     [cl-struct-wg-wconfig "0GGI0JY4B3HD0WEO-86RSR3" ...
        [cl-struct-wg-wtree ...
           ([cl-struct-wg-win ...
            [cl-struct-wg-win ...

General info

All these structs (better to say functions to work with these objects) are created with :keyword:`wg-defstruct` macro. For example for:

(wg-defstruct wg session
  (uid (wg-generate-uid))

wg-defstruct creates functions like wg-make-session, wg-copy-session and wg-session-..., (to manipulate structures). Then you will have (wg-session-field-2 obj) and other defined fields to read properties of this object.

To set values (setf ...) function is used.

Example for current session object:

;; Read
(wg-session-file-name (wg-current-session))         ; Get a filename of current session
(wg-workgroup-parameters (wg-current-workgroup))    ; Get workgroup parameters

;; Write (used just before saving session to file)
(setf (wg-session-file-name (wg-current-session)) filename)    ; Set session filename
(setf (wg-session-version (wg-current-session)) wg-version)    ; Write workgroups version


Changing these defstructs themselves may break everyone's session files. That's why many of them have :ref:`parameters` field. This one is exactly for extending saved information.

How to work with these structures?

Ok, we define a session structure, and you can get the value of it with (wg-current-session)

wg-defstruct creates functions like wg-session-..., wg-make-session (to manipulate structures). So if you have (wg-defstruct wg session ...) - then you have wg-session-file-name and other defined fields.


The session object is the top level "class" that has workgroups in it.

(wg-defstruct wg session
  (uid (wg-generate-uid))
  (version wg-version)


List of buffers is a common pool for all workgroups. When you open a file (doesn't matter in which workgroup) - the corresponding :ref:`wg-buffer` object will be added in wg-session-buf-list


workgroups contain frame states (that includes window configuration)

(wg-defstruct wg workgroup
  (uid (wg-generate-uid))


(wg-defstruct wg wconfig
  (uid (wg-generate-uid))

What's the difference between wconfig and wtree? Well a workgroup can have several wconfigs (buffer layouts). But to keep it simple let's say each workgroup has only 1 wconfig.

wconfig = wtree + additional parameters


(wg-defstruct wg wtree


(wg-defstruct wg win



Changing main structures may lead to huge problems in compatibility. That's why there are parameters for :ref:`wg-session`, :ref:`wg-workgroup`, :ref:`wg-wconfig` and :ref:`wg-win` objects. They allow you to save your custom data.

For example to set (key, value) pair for current workgroup:

;; Write (key, value)
 'ecb                                            ; name
 (and (boundp 'ecb-minor-mode) ecb-minor-mode))  ; value

Usually these functions are called like:

wg-<object>-parameter          ; to read
wg-set-<object>-parameter      ; to set
wg-remove-<object>-parameter   ; to remove parameter

For session: wg-session-parameter, wg-set-session-parameter, wg-remove-session-parameter For workgroup: wg-workgroup-parameter, wg-set-workgroup-parameter, wg-remove-workgroup-parameter