1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
* See LICENSE file for 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.c:main().
*/
#include "config.h"
#include <X11/Xlib.h>
/* mask shorthands, used in event.c and client.c */
#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */
enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
typedef union {
const char *cmd;
int i;
} Arg; /* argument type */
typedef struct {
int ascent;
int descent;
int height;
XFontSet set;
XFontStruct *xfont;
} Fnt;
typedef struct {
int x, y, w, h;
unsigned long norm[ColLast];
unsigned long sel[ColLast];
Drawable drawable;
Fnt font;
GC gc;
} DC; /* draw context */
typedef struct Client Client;
struct Client {
char name[256];
int x, y, w, h;
int rx, ry, rw, rh; /* revert geometry */
int basew, baseh, incw, inch, maxw, maxh, minw, minh;
int minax, minay, maxax, maxay;
long flags;
unsigned int border;
Bool isbanned, isfixed, isfloat, ismax;
Bool *tags;
Client *next;
Client *prev;
Client *snext;
Window win;
};
typedef struct {
const char *symbol;
void (*arrange)(void);
} Layout;
extern const char *tags[]; /* all tags */
extern char stext[256]; /* status text */
extern int screen, sx, sy, sw, sh; /* screen geometry */
extern int wax, way, wah, waw; /* windowarea geometry */
extern unsigned int bh, blw; /* bar height, bar layout label width */
extern unsigned int master, nmaster; /* master percent, number of master clients */
extern unsigned int ntags, numlockmask; /* number of tags, dynamic lock mask */
extern void (*handler[LASTEvent])(XEvent *); /* event handler */
extern Atom wmatom[WMLast], netatom[NetLast];
extern Bool running, selscreen, *seltag; /* seltag is array of Bool */
extern Client *clients, *sel, *stack; /* global client list and stack */
extern Cursor cursor[CurLast];
extern DC dc; /* global draw context */
extern Display *dpy;
extern Layout *lt;
extern Window root, barwin;
/* client.c */
extern void configure(Client *c); /* send synthetic configure event */
extern void focus(Client *c); /* focus c, c may be NULL */
extern void focusnext(Arg *arg); /* focuses next visible client, arg is ignored */
extern void focusprev(Arg *arg); /* focuses previous visible client, arg is ignored */
extern void killclient(Arg *arg); /* kill c nicely */
extern void manage(Window w, XWindowAttributes *wa); /* manage new client */
extern Client *nexttiled(Client *c); /* returns tiled successor of c */
extern void resize(Client *c, int x, int y,
int w, int h, Bool sizehints); /* resize with given coordinates c*/
extern void updatesizehints(Client *c); /* update the size hint variables of c */
extern void updatetitle(Client *c); /* update the name of c */
extern void unmanage(Client *c); /* destroy c */
extern void zoom(Arg *arg); /* zooms the focused client to master area, arg is ignored */
/* event.c */
extern void grabkeys(void); /* grab all keys defined in config.h */
/* main.c */
extern void drawstatus(void); /* draw the bar */
extern unsigned int textw(const char *text); /* return the width of text in px*/
extern void quit(Arg *arg); /* quit dwm nicely */
extern void sendevent(Window w, Atom a, long value); /* send synthetic event to w */
extern int xerror(Display *dsply, XErrorEvent *ee); /* dwm's X error handler */
/* screen.c */
extern void compileregs(void); /* initialize regexps of rules defined in config.h */
extern void dofloat(void); /* arranges all windows floating */
extern void dotile(void); /* arranges all windows tiled */
extern void incnmaster(Arg *arg); /* increments nmaster with arg's index value */
extern void initlayouts(void); /* initialize layout array */
extern Bool isvisible(Client *c); /* returns True if client is visible */
extern void resizemaster(Arg *arg); /* resizes the master percent with arg's index value */
extern void restack(void); /* restores z layers of all clients */
extern void settags(Client *c, Client *trans); /* sets tags of c */
extern void tag(Arg *arg); /* tags c with arg's index */
extern void togglefloat(Arg *arg); /* toggles focusesd client between floating/non-floating state */
extern void togglelayout(Arg *arg); /* toggles layout */
extern void toggletag(Arg *arg); /* toggles c tags with arg's index */
extern void toggleview(Arg *arg); /* toggles the tag with arg's index (in)visible */
extern void view(Arg *arg); /* views the tag with arg's index */
/* util.c */
extern void *emallocz(unsigned int size); /* allocates zero-initialized memory, exits on error */
extern void eprint(const char *errstr, ...); /* prints errstr and exits with 1 */
extern void spawn(Arg *arg); /* forks a new subprocess with to arg's cmd */
|