dwm.h

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  *
   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
   7  * manager selects for SubstructureRedirectMask on the root window, to receive
   8  * events about window (dis-)appearance.  Only one X connection at a time is
   9  * allowed to select for this event mask.
  10  *
  11  * Calls to fetch an X event from the event queue are blocking.  Due reading
  12  * status text from standard input, a select-driven main loop has been
  13  * implemented which selects for reads on the X connection and STDIN_FILENO to
  14  * handle all data smoothly. The event handlers of dwm are organized in an
  15  * array which is accessed whenever a new event has been fetched. This allows
  16  * event dispatching in O(1) time.
  17  *
  18  * Each child of the root window is called a client, except windows which have
  19  * set the override_redirect flag.  Clients are organized in a global
  20  * doubly-linked client list, the focus history is remembered through a global
  21  * stack list. Each client contains an array of Bools of the same size as the
  22  * global tags array to indicate the tags of a client.  For each client dwm
  23  * creates a small title window, which is resized whenever the (_NET_)WM_NAME
  24  * properties are updated or the client is moved/resized.
  25  *
  26  * Keys and tagging rules are organized as arrays and defined in the config.h
  27  * file. These arrays are kept static in event.o and tag.o respectively,
  28  * because no other part of dwm needs access to them.  The current mode is
  29  * represented by the arrange function pointer, which wether points to dofloat
  30  * or dotile.
  31  *
  32  * To understand everything else, start reading main.c:main().
  33  */
  34
  35 #include "config.h"
  36 #include <X11/Xlib.h>
  37
  38 /* mask shorthands, used in event.c and client.c */
  39 #define BUTTONMASK              (ButtonPressMask | ButtonReleaseMask)
  40 #define MOUSEMASK               (BUTTONMASK | PointerMotionMask)
  41 #define PROTODELWIN             1
  42
  43 enum { NetSupported, NetWMName, NetLast };              /* EWMH atoms */
  44 enum { WMProtocols, WMDelete, WMLast };                 /* default atoms */
  45 enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
  46 enum { ColFG, ColBG, ColLast };                         /* color */
  47
  48 typedef enum {
  49         TopLeft, TopRight, BotLeft, BotRight
  50 } Corner; /* window corners */
  51
  52 typedef union {
  53         const char *cmd;
  54         int i;
  55 } Arg; /* argument type */
  56
  57 typedef struct {
  58         int ascent;
  59         int descent;
  60         int height;
  61         XFontSet set;
  62         XFontStruct *xfont;
  63 } Fnt;
  64
  65 typedef struct {
  66         int x, y, w, h;
  67         unsigned long norm[ColLast];
  68         unsigned long sel[ColLast];
  69         unsigned long status[ColLast];
  70         Drawable drawable;
  71         Fnt font;
  72         GC gc;
  73 } DC; /* draw context */
  74
  75 typedef struct Client Client;
  76 struct Client {
  77         char name[256];
  78         int proto;
  79         int x, y, w, h;
  80         int tx, ty, tw, th; /* title window geometry */
  81         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  82         int grav;
  83         long flags;
  84         unsigned int border, weight;
  85         Bool isfloat;
  86         Bool *tags;
  87         Client *next;
  88         Client *prev;
  89         Client *snext;
  90         Window win;
  91         Window twin;
  92 };
  93
  94 extern const char *tags[];                      /* all tags */
  95 extern char stext[1024];                        /* status text */
  96 extern int bx, by, bw, bh, bmw;                 /* bar geometry, bar mode label width */
  97 extern int mw, screen, sx, sy, sw, sh;          /* screen geometry, master width */
  98 extern unsigned int ntags, numlockmask;         /* number of tags, dynamic lock mask */
  99 extern void (*handler[LASTEvent])(XEvent *);    /* event handler */
 100 extern void (*arrange)(Arg *);                  /* arrange function, indicates mode  */
 101 extern Atom wmatom[WMLast], netatom[NetLast];
 102 extern Bool running, issel, maximized, *seltag; /* seltag is array of Bool */
 103 extern Client *clients, *sel, *stack;           /* global cleint list and stack */
 104 extern Cursor cursor[CurLast];
 105 extern DC dc;                                   /* global draw context */
 106 extern Display *dpy;
 107 extern Window root, barwin;
 108
 109 /* client.c */
 110 extern void ban(Client *c);                     /* ban c from screen */
 111 extern void focus(Client *c);                   /* focus c, c may be NULL */
 112 extern Client *getclient(Window w);             /* return client of w */
 113 extern Client *getctitle(Window w);             /* return client of title window */
 114 extern void gravitate(Client *c, Bool invert);  /* gravitate c */
 115 extern void killclient(Arg *arg);               /* kill c nicely */
 116 extern void manage(Window w, XWindowAttributes *wa);    /* manage new client */
 117 extern void resize(Client *c, Bool sizehints, Corner sticky); /* resize c*/
 118 extern void updatesize(Client *c);                      /* update the size structs of c */
 119 extern void updatetitle(Client *c);             /* update the name of c */
 120 extern void togglemax(Arg *arg);                /* (un)maximize c */
 121 extern void unmanage(Client *c);                /* destroy c */
 122
 123 /* draw.c */
 124 extern void drawall();                          /* draw all visible client titles and the bar */
 125 extern void drawstatus();                       /* draw the bar */
 126 extern void drawtitle(Client *c);               /* draw title of c */
 127 extern unsigned long getcolor(const char *colstr);      /* return color of colstr */
 128 extern void setfont(const char *fontstr);       /* set the font for DC */
 129 extern unsigned int textw(const char *text);    /* return the width of text in px*/
 130
 131 /* event.c */
 132 extern void grabkeys();                         /* grab all keys defined in config.h */
 133 extern void procevent();                        /* process pending X events */
 134
 135 /* main.c */
 136 extern int getproto(Window w);                  /* return protocol mask of WMProtocols property of w */
 137 extern void quit(Arg *arg);                     /* quit dwm nicely */
 138 extern void sendevent(Window w, Atom a, long value);    /* send synthetic event to w */
 139 extern int xerror(Display *dsply, XErrorEvent *ee);     /* dwm's X error handler */
 140
 141 /* tag.c */
 142 extern void initrregs();                        /* initialize regexps of rules defined in config.h */
 143 extern Client *getnext(Client *c);              /* returns next visible client */
 144 extern Client *getprev(Client *c);              /* returns previous visible client */
 145 extern void settags(Client *c, Client *trans);  /* sets tags of c */
 146 extern void tag(Arg *arg);                      /* tags c with arg's index */
 147 extern void toggletag(Arg *arg);                /* toggles c tags with arg's index */
 148
 149 /* util.c */
 150 extern void *emallocz(unsigned int size);       /* allocates zero-initialized memory, exits on error */
 151 extern void eprint(const char *errstr, ...);    /* prints errstr and exits with 1 */
 152 extern void *erealloc(void *ptr, unsigned int size);    /* reallocates memory, exits on error */
 153 extern void spawn(Arg *arg);                    /* forks a new subprocess with to arg's cmd */
 154
 155 /* view.c */
 156 extern void detach(Client *c);                  /* detaches c from global client list */
 157 extern void dofloat(Arg *arg);                  /* arranges all windows floating, arg is ignored */
 158 extern void dotile(Arg *arg);                   /* arranges all windows, arg is ignored */
 159 extern void focusnext(Arg *arg);                /* focuses next visible client, arg is ignored  */
 160 extern void focusprev(Arg *arg);                /* focuses previous visible client, arg is ignored */
 161 extern Bool isvisible(Client *c);               /* returns True if client is visible */
 162 extern void resizecol(Arg *arg);                /* resizes the master width with arg's index value */
 163 extern void restack();                          /* restores z layers of all clients */
 164 extern void togglemode(Arg *arg);               /* toggles global arrange function (dotile/dofloat) */
 165 extern void toggleview(Arg *arg);               /* toggles the tag with arg's index (in)visible */
 166 extern void view(Arg *arg);                     /* views the tag with arg's index */
 167 extern void viewall(Arg *arg);                  /* views all tags, arg is ignored */
 168 extern void zoom(Arg *arg);                     /* zooms the focused client to master column, arg is ignored */