/* See LICENSE file for copyright and license details.

 *

 * dynamic window manager is designed like any other X client as well. It is

 * driven through handling X events. In contrast to other X clients, a window

 * manager selects for SubstructureRedirectMask on the root window, to receive

 * events about window (dis-)appearance.  Only one X connection at a time is

 * allowed to select for this event mask.

 *

 * Calls to fetch an X event from the event queue are blocking.  Due reading

 * status text from standard input, a select()-driven main loop has been

 * implemented which selects for reads on the X connection and STDIN_FILENO to

 * handle all data smoothly. The event handlers of dwm are organized in an

 * array which is accessed whenever a new event has been fetched. This allows

 * event dispatching in O(1) time.

 *

 * Each child of the root window is called a client, except windows which have

 * set the override_redirect flag.  Clients are organized in a global

 * doubly-linked client list, the focus history is remembered through a global

 * stack list. Each client contains an array of Bools of the same size as the

 * global tags array to indicate the tags of a client.  For each client dwm

 * creates a small title window, which is resized whenever the (_NET_)WM_NAME

 * properties are updated or the client is moved/resized.

 *

 * Keys and tagging rules are organized as arrays and defined in the config.h

 * file. These arrays are kept static in event.o and tag.o respectively,

 * because no other part of dwm needs access to them.  The current layout is

 * represented by the lt pointer.

 *

 * To understand everything else, start reading main().

 */