dwm/dwm.h

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/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
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* 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
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* 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.
*
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* 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
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* 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
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* 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 mode is
* represented by the arrange() function pointer, which wether points to
* dofloat() or dotile().
*
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* To understand everything else, start reading main.c:main().
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*/
#include "config.h"
#include <X11/Xlib.h>
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/* mask shorthands, used in event.c and client.c */
#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
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/* other stuff used in different places */
#define BORDERPX 1
#define PROTODELWIN 1
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enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
enum { WMProtocols, WMDelete, WMLast }; /* default atoms */
enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
enum { ColFG, ColBG, ColLast }; /* color */
typedef enum {
TopLeft, TopRight, BotLeft, BotRight
} Corner; /* window corners */
typedef union {
const char *cmd;
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int i;
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} Arg; /* argument type */
typedef struct {
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int ascent;
int descent;
int height;
XFontSet set;
XFontStruct *xfont;
} Fnt;
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typedef struct {
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int x, y, w, h;
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unsigned long norm[ColLast];
unsigned long sel[ColLast];
unsigned long status[ColLast];
Drawable drawable;
Fnt font;
GC gc;
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} DC; /* draw context */
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typedef struct Client Client;
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struct Client {
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char name[256];
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int proto;
int x, y, w, h;
int rx, ry, rw, rh; /* revert geometry */
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int tx, ty, tw, th; /* title window geometry */
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int basew, baseh, incw, inch, maxw, maxh, minw, minh;
long flags;
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unsigned int border;
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Bool isfloat, isfixed, ismax;
Bool *tags;
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Client *next;
Client *prev;
Client *snext;
Window win;
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Window twin;
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};
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extern const char *tags[]; /* all tags */
extern char stext[1024]; /* status text */
extern int bx, by, bw, bh, bmw; /* bar geometry, bar mode label width */
extern int screen, sx, sy, sw, sh; /* screen geometry */
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extern int wax, way, wah, waw; /* windowarea geometry */
extern unsigned int master, ntags, numlockmask; /* master percent, number of tags, dynamic lock mask */
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extern void (*handler[LASTEvent])(XEvent *); /* event handler */
extern void (*arrange)(void); /* arrange function, indicates mode */
extern Atom wmatom[WMLast], netatom[NetLast];
extern Bool running, issel, *seltag; /* seltag is array of Bool */
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extern Client *clients, *sel, *stack; /* global client list and stack */
extern Cursor cursor[CurLast];
extern DC dc; /* global draw context */
extern Display *dpy;
extern Window root, barwin;
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/* client.c */
extern void ban(Client *c); /* ban c from screen */
extern void configure(Client *c); /* send synthetic configure event */
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extern void focus(Client *c); /* focus c, c may be NULL */
extern Client *getclient(Window w); /* return client of w */
extern Client *getctitle(Window w); /* return client of title window */
extern void killclient(Arg *arg); /* kill c nicely */
extern void manage(Window w, XWindowAttributes *wa); /* manage new client */
extern void resize(Client *c, Bool sizehints, Corner sticky); /* resize c*/
extern void resizetitle(Client *c); /* resizes c->twin correctly */
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extern void updatesizehints(Client *c); /* update the size hint variables of c */
extern void updatetitle(Client *c); /* update the name of c */
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extern void unmanage(Client *c); /* destroy c */
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/* draw.c */
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extern void drawall(void); /* draw all visible client titles and the bar */
extern void drawstatus(void); /* draw the bar */
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extern void drawclient(Client *c); /* draw title and set border of c */
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extern unsigned long getcolor(const char *colstr); /* return color of colstr */
extern void setfont(const char *fontstr); /* set the font for DC */
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extern unsigned int textw(const char *text); /* return the width of text in px*/
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/* event.c */
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extern void grabkeys(void); /* grab all keys defined in config.h */
extern void procevent(void); /* process pending X events */
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/* main.c */
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extern int getproto(Window w); /* return protocol mask of WMProtocols property of w */
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 */
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/* tag.c */
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extern void initrregs(void); /* initialize regexps of rules defined in config.h */
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extern Client *getnext(Client *c); /* returns next visible client */
extern Client *getprev(Client *c); /* returns previous visible client */
extern void settags(Client *c, Client *trans); /* sets tags of c */
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extern void tag(Arg *arg); /* tags c with arg's index */
extern void toggletag(Arg *arg); /* toggles c tags with arg's index */
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/* util.c */
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extern void *emallocz(unsigned int size); /* allocates zero-initialized memory, exits on error */
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extern void eprint(const char *errstr, ...); /* prints errstr and exits with 1 */
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extern void *erealloc(void *ptr, unsigned int size); /* reallocates memory, exits on error */
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extern void spawn(Arg *arg); /* forks a new subprocess with to arg's cmd */
/* view.c */
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extern void detach(Client *c); /* detaches c from global client list */
extern void dofloat(void); /* arranges all windows floating */
extern void dotile(void); /* arranges all windows tiled */
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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 Bool isvisible(Client *c); /* returns True if client is visible */
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extern void resizemaster(Arg *arg); /* resizes the master percent with arg's index value */
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extern void restack(void); /* restores z layers of all clients */
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extern void togglefloat(Arg *arg); /* toggles focusesd client between floating/non-floating state */
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extern void togglemode(Arg *arg); /* toggles global arrange function (dotile/dofloat) */
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 */
extern void zoom(Arg *arg); /* zooms the focused client to master area, arg is ignored */