3 * See LICENSE file for license details. |
3 * See LICENSE file for license details. |
4 * |
4 * |
5 * dynamic window manager is designed like any other X client as well. It is |
5 * dynamic window manager is designed like any other X client as well. It is |
6 * driven through handling X events. In contrast to other X clients, a window |
6 * driven through handling X events. In contrast to other X clients, a window |
7 * manager like dwm selects for SubstructureRedirectMask on the root window, to |
7 * manager like dwm selects for SubstructureRedirectMask on the root window, to |
8 * receive events about child window appearance and disappearance. Only one X |
8 * receive events about window appearance and disappearance. Only one X |
9 * connection at a time is allowed to select for this event mask. |
9 * connection at a time is allowed to select for this event mask. |
10 * |
10 * |
11 * Calls to fetch an X event from the event queue of the X connection are |
11 * Calls to fetch an X event from the X event queue connection are blocking. |
12 * blocking. Due the fact, that dwm reads status text from standard input, a |
12 * Due reading status text from standard input, a select-driven main loop has |
13 * select-driven main loop has been implemented which selects for reads on the |
13 * been implemented which selects for reads on the X connection and |
14 * X connection and STDIN_FILENO to handle all data smoothly and without |
14 * STDIN_FILENO to handle all data smoothly and without busy-loop quirks. The |
15 * busy-loop quirks. The event handlers of dwm are organized in an array which |
15 * event handlers of dwm are organized in an array which is accessed whenever a |
16 * is accessed whenever a new event has been fetched. This allows event |
16 * new event has been fetched. This allows event dispatching in O(1) time. |
17 * dispatching in O(1) time. |
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18 * |
17 * |
19 * Each child window of the root window is called a client in window manager |
18 * Each child of the root window is called a client, except windows which have |
20 * terminology, except windows which have set the override_redirect flag. |
19 * set the override_redirect flag. Clients are organized in a global |
21 * Clients are organized in a global doubly-linked client list, the focus |
20 * doubly-linked client list, the focus history is remembered through a global |
22 * history is remembered through a global stack list. Each client contains an |
21 * stack list. Each client contains an array of Bools of the same size as the |
23 * array of Bools of the same size as the global tags array to indicate the |
22 * global tags array to indicate the tags of a client. For each client dwm |
24 * tags of a client. There are no other data structures to organize the clients |
23 * creates a small title window which is resized whenever the WM_NAME or |
25 * in tag lists. All clients which have at least one tag enabled of the current |
24 * _NET_WM_NAME properties are updated or the client is resized. |
26 * tags viewed, will be visible on the screen, all other clients are banned to |
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27 * the x-location x + 2 * screen width. This avoids having additional layers |
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28 * of workspace handling. |
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29 * |
25 * |
30 * For each client dwm creates a small title window which is resized whenever |
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31 * the WM_NAME or _NET_WM_NAME properties are updated or the client is resized. |
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32 * Keys and tagging rules are organized as arrays and defined in the config.h |
26 * Keys and tagging rules are organized as arrays and defined in the config.h |
33 * file. These arrays are kept static in event.o and tag.o respectively, |
27 * file. These arrays are kept static in event.o and tag.o respectively, |
34 * because no other part of dwm needs access to them. The current mode is |
28 * because no other part of dwm needs access to them. The current mode is |
35 * represented by the arrange function pointer which wether points to dofloat |
29 * represented by the arrange function pointer which wether points to dofloat |
36 * or dotile. |
30 * or dotile. |