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| author | paulo@thepaulopc |
|---|---|
| date | Tue, 14 Jun 2011 00:33:07 -0700 |
| parents | 0968b3739b8d |
| children | bc03b37b37ba |
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1 /* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
2 * See LICENSE file for license details.
3 *
4 * dynamic window manager is designed like any other X client as well. It is
5 * driven through handling X events. In contrast to other X clients, a window
6 * manager selects for SubstructureRedirectMask on the root window, to receive
7 * events about window (dis-)appearance. Only one X connection at a time is
8 * allowed to select for this event mask.
9 *
10 * Calls to fetch an X event from the event queue are blocking. Due reading
11 * status text from standard input, a select()-driven main loop has been
12 * implemented which selects for reads on the X connection and STDIN_FILENO to
13 * handle all data smoothly. The event handlers of dwm are organized in an
14 * array which is accessed whenever a new event has been fetched. This allows
15 * event dispatching in O(1) time.
16 *
17 * Each child of the root window is called a client, except windows which have
18 * set the override_redirect flag. Clients are organized in a global
19 * doubly-linked client list, the focus history is remembered through a global
20 * stack list. Each client contains an array of Bools of the same size as the
21 * global tags array to indicate the tags of a client. For each client dwm
22 * creates a small title window, which is resized whenever the (_NET_)WM_NAME
23 * properties are updated or the client is moved/resized.
24 *
25 * Keys and tagging rules are organized as arrays and defined in the config.h
26 * file. These arrays are kept static in event.o and tag.o respectively,
27 * because no other part of dwm needs access to them. The current layout is
28 * represented by the lt pointer.
29 *
30 * To understand everything else, start reading main.c:main().
31 */
33 #include "config.h"
34 #include <X11/Xlib.h>
36 #define LENGTH(X) (sizeof X / sizeof X[0])
38 /* mask shorthands, used in event.c and client.c */
39 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
41 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
42 enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
43 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
44 enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
46 typedef union {
47 const char *cmd;
48 int i;
49 } Arg; /* argument type */
51 typedef struct {
52 int ascent;
53 int descent;
54 int height;
55 XFontSet set;
56 XFontStruct *xfont;
57 } Fnt;
59 typedef struct {
60 int x, y, w, h;
61 unsigned long norm[ColLast];
62 unsigned long sel[ColLast];
63 Drawable drawable;
64 Fnt font;
65 GC gc;
66 } DC; /* draw context */
68 typedef struct Client Client;
69 struct Client {
70 char name[256];
71 int x, y, w, h;
72 int rx, ry, rw, rh; /* revert geometry */
73 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
74 int minax, minay, maxax, maxay;
75 long flags;
76 unsigned int border;
77 Bool isbanned, isfixed, ismax, isversatile;
78 Bool *tags;
79 Client *next;
80 Client *prev;
81 Client *snext;
82 Window win;
83 };
85 typedef struct {
86 const char *symbol;
87 void (*arrange)(void);
88 } Layout;
90 extern const char *tags[]; /* all tags */
91 extern char stext[256]; /* status text */
92 extern char cmtext[256]; /* command mode text */
93 extern int screen, sx, sy, sw, sh; /* screen geometry */
94 extern int wax, way, wah, waw; /* windowarea geometry */
95 extern unsigned int bh, blw; /* bar height, bar layout label width */
96 extern unsigned int master, nmaster; /* master percent, number of master clients */
97 extern unsigned int ntags, numlockmask; /* number of tags, dynamic lock mask */
98 extern void (*handler[LASTEvent])(XEvent *); /* event handler */
99 extern Atom wmatom[WMLast], netatom[NetLast];
100 extern Bool selscreen, *seltag; /* seltag is array of Bool */
101 extern Client *clients, *sel, *stack; /* global client list and stack */
102 extern Cursor cursor[CurLast];
103 extern DC dc; /* global draw context */
104 extern Display *dpy;
105 extern Layout *lt;
106 extern Window root, barwin, tbarwin;
108 /* client.c */
109 extern void configure(Client *c); /* send synthetic configure event */
110 extern void focus(Client *c); /* focus c, c may be NULL */
111 extern void killclient(Arg *arg); /* kill c nicely */
112 extern void manage(Window w, XWindowAttributes *wa); /* manage new client */
113 extern void resize(Client *c, int x, int y,
114 int w, int h, Bool sizehints); /* resize with given coordinates c*/
115 extern void toggleversatile(Arg *arg); /* toggles focused client between versatile/and non-versatile state */
116 extern void updatesizehints(Client *c); /* update the size hint variables of c */
117 extern void updatetitle(Client *c); /* update the name of c */
118 extern void unmanage(Client *c); /* destroy c */
119 extern void zoom(Arg *arg); /* zooms the focused client to master area, arg is ignored */
120 extern void zoom_insert(Arg *arg); /* zoom, then go into insert mode */
121 extern void pushup(Arg *arg);
122 extern void pushdown(Arg *arg);
123 extern void moveresize(Arg *arg);
125 /* draw.c */
126 extern void drawstatus(void); /* draw the bar */
127 extern void drawtext(const char *text,
128 unsigned long col[ColLast]); /* draw text */
129 extern unsigned int textw(const char *text); /* return the width of text in px*/
131 /* event.c */
132 extern void grabkeys(void); /* grab all keys defined in config.h */
133 extern void clearcmd(Arg *arg);
134 extern void setkeymode(Arg *arg);
135 extern unsigned int getkeymode(void);
136 extern void func_insert(void (*argfunc)(Arg *), Arg *arg);
138 /* layout.c */
139 extern void focusnext(Arg *arg); /* focuses next visible client, arg is ignored */
140 extern void focusprev(Arg *arg); /* focuses previous visible client, arg is ignored */
141 extern void incnmaster(Arg *arg); /* increments nmaster with arg's index value */
142 extern void initlayouts(void); /* initialize layout array */
143 extern Client *nexttiled(Client *c); /* returns tiled successor of c */
144 extern void resizemaster(Arg *arg); /* resizes the master percent with arg's index value */
145 extern void restack(void); /* restores z layers of all clients */
146 extern void setlayout(Arg *arg); /* sets layout, -1 toggles */
147 extern void versatile(void); /* arranges all windows versatile */
149 /* main.c */
150 extern void quit(Arg *arg); /* quit dwm nicely */
151 extern void sendevent(Window w, Atom a, long value); /* send synthetic event to w */
152 extern int xerror(Display *dsply, XErrorEvent *ee); /* dwm's X error handler */
154 /* tag.c */
155 extern void compileregs(void); /* initialize regexps of rules defined in config.h */
156 extern Bool isvisible(Client *c); /* returns True if client is visible */
157 extern void settags(Client *c, Client *trans); /* sets tags of c */
158 extern void tag(Arg *arg); /* tags c with arg's index */
159 extern void toggletag(Arg *arg); /* toggles c tags with arg's index */
160 extern void toggleview(Arg *arg); /* toggles the tag with arg's index (in)visible */
161 extern void view(Arg *arg); /* views the tag with arg's index */
162 extern void last_view(Arg *arg); /* go to last viewed tag */
163 extern void next_view(Arg *arg); /* go to next/prev tag */
164 extern void tag_n_view(Arg *arg); /* tag then view */
166 /* util.c */
167 extern void *emallocz(unsigned int size); /* allocates zero-initialized memory, exits on error */
168 extern void eprint(const char *errstr, ...); /* prints errstr and exits with 1 */
169 extern void spawn(Arg *arg); /* forks a new subprocess with arg's cmd */
170 extern void spawn_insert(Arg *arg); /* spawn, then go into insert mode */