dwm.h (view raw)
1/* © 2006-2007 Anselm R. Garbe <garbeam at gmail dot com>
2 * © 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
3 * © 2006-2007 Jukka Salmi <jukka at salmi dot ch>
4 * © 2007 Premysl Hruby <dfenze at gmail dot com>
5 * © 2007 Szabolcs Nagy <nszabolcs at gmail dot com>
6 * See LICENSE file for license details.
7 *
8 * dynamic window manager is designed like any other X client as well. It is
9 * driven through handling X events. In contrast to other X clients, a window
10 * manager selects for SubstructureRedirectMask on the root window, to receive
11 * events about window (dis-)appearance. Only one X connection at a time is
12 * allowed to select for this event mask.
13 *
14 * Calls to fetch an X event from the event queue are blocking. Due reading
15 * status text from standard input, a select()-driven main loop has been
16 * implemented which selects for reads on the X connection and STDIN_FILENO to
17 * handle all data smoothly. The event handlers of dwm are organized in an
18 * array which is accessed whenever a new event has been fetched. This allows
19 * event dispatching in O(1) time.
20 *
21 * Each child of the root window is called a client, except windows which have
22 * set the override_redirect flag. Clients are organized in a global
23 * doubly-linked client list, the focus history is remembered through a global
24 * stack list. Each client contains an array of Bools of the same size as the
25 * global tags array to indicate the tags of a client. For each client dwm
26 * creates a small title window, which is resized whenever the (_NET_)WM_NAME
27 * properties are updated or the client is moved/resized.
28 *
29 * Keys and tagging rules are organized as arrays and defined in the config.h
30 * file. These arrays are kept static in event.o and tag.o respectively,
31 * because no other part of dwm needs access to them. The current layout is
32 * represented by the lt pointer.
33 *
34 * To understand everything else, start reading main.c:main().
35 */
36
37#include "config.h"
38#include <X11/Xlib.h>
39
40/* mask shorthands, used in event.c and client.c */
41#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
42
43enum { BarTop, BarBot, BarOff }; /* bar position */
44enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
45enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
46enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
47enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
48
49typedef struct Client Client;
50struct Client {
51 char name[256];
52 int x, y, w, h;
53 int rx, ry, rw, rh; /* revert geometry */
54 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
55 int minax, maxax, minay, maxay;
56 long flags;
57 unsigned int border, oldborder;
58 Bool isbanned, isfixed, ismax, isfloating;
59 Bool *tags;
60 Client *next;
61 Client *prev;
62 Client *snext;
63 Window win;
64};
65
66typedef struct {
67 int x, y, w, h;
68 unsigned long norm[ColLast];
69 unsigned long sel[ColLast];
70 Drawable drawable;
71 GC gc;
72 struct {
73 int ascent;
74 int descent;
75 int height;
76 XFontSet set;
77 XFontStruct *xfont;
78 } font;
79} DC; /* draw context */
80
81typedef struct {
82 const char *symbol;
83 void (*arrange)(void);
84} Layout;
85
86extern const char *tags[]; /* all tags */
87char stext[256]; /* status text */
88int screen, sx, sy, sw, sh; /* screen geometry */
89int wax, way, wah, waw; /* windowarea geometry */
90unsigned int bh, blw, bpos; /* bar height, bar layout label width, bar position */
91unsigned int ntags, numlockmask; /* number of tags, dynamic lock mask */
92void (*handler[LASTEvent])(XEvent *); /* event handler */
93Atom wmatom[WMLast], netatom[NetLast];
94Bool selscreen, *seltag; /* seltag is array of Bool */
95Client *clients, *sel, *stack; /* global client list and stack */
96Cursor cursor[CurLast];
97DC dc; /* global draw context */
98Display *dpy;
99Layout *lt;
100Window root, barwin;
101
102/* client.c */
103void attach(Client *c); /* attaches c to global client list */
104void configure(Client *c); /* send synthetic configure event */
105void detach(Client *c); /* detaches c from global client list */
106void focus(Client *c); /* focus c if visible && !NULL, or focus top visible */
107void killclient(const char *arg); /* kill sel nicely */
108void manage(Window w, XWindowAttributes *wa); /* manage new client */
109void resize(Client *c, int x, int y,
110 int w, int h, Bool sizehints); /* resize with given coordinates c*/
111void togglefloating(const char *arg); /* toggles sel between floating/tiled state */
112void updatesizehints(Client *c); /* update the size hint variables of c */
113void updatetitle(Client *c); /* update the name of c */
114void unmanage(Client *c); /* destroy c */
115
116/* draw.c */
117void drawstatus(void); /* draw the bar */
118void drawtext(const char *text, unsigned long col[ColLast]); /* draw text */
119unsigned int textw(const char *text); /* return the width of text in px*/
120
121/* event.c */
122void grabkeys(void); /* grab all keys defined in config.h */
123
124/* layout.c */
125void floating(void); /* arranges all windows floating */
126void focusclient(const char *arg); /* focuses next(1)/previous(-1) visible client */
127void incmasterw(const char *arg); /* increments the master width with arg's index value */
128void incnmaster(const char *arg); /* increments nmaster with arg's index value */
129void initlayouts(void); /* initialize layout array */
130Client *nexttiled(Client *c); /* returns tiled successor of c */
131void restack(void); /* restores z layers of all clients */
132void setlayout(const char *arg); /* sets layout, NULL means next layout */
133void togglebar(const char *arg); /* shows/hides the bar */
134void togglemax(const char *arg); /* toggles maximization of floating client */
135void zoom(const char *arg); /* zooms the focused client to master area, arg is ignored */
136
137/* main.c */
138void updatebarpos(void); /* updates the bar position */
139void quit(const char *arg); /* quit dwm nicely */
140int xerror(Display *dsply, XErrorEvent *ee); /* dwm's X error handler */
141
142/* tag.c */
143void compileregs(void); /* initialize regexps of rules defined in config.h */
144Bool isvisible(Client *c); /* returns True if client is visible */
145void settags(Client *c, Client *trans); /* sets tags of c */
146void tag(const char *arg); /* tags sel with arg's index */
147void toggletag(const char *arg); /* toggles sel tags with arg's index */
148void toggleview(const char *arg); /* toggles the tag with arg's index (in)visible */
149void view(const char *arg); /* views the tag with arg's index */
150
151/* util.c */
152void *emallocz(unsigned int size); /* allocates zero-initialized memory, exits on error */
153void eprint(const char *errstr, ...); /* prints errstr and exits with 1 */
154void spawn(const char *arg); /* forks a new subprocess with arg's cmd */