/* * (C)opyright MMVI Anselm R. Garbe * 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 like dwm selects for SubstructureRedirectMask on the root window, to * receive events about child window appearance and disappearance. Only one X * connection at a time is allowed to select for this event mask by any X * server, thus only one window manager instance can be executed at a time. * Any attempt to select for SubstructureRedirectMask by any connection after * another connection already selected for those events, will result in an * error generated by the server. Such errors are reported through calling the * current X error handler. * * Calls to pop an X event from the event queue of the X connection are * blocking. Due the fact, that dwm reads 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 and without * busy-loop quirks.. The event handlers of dwm are organized in an array * which is accessed whenever a new event has been popped. This allows event * dispatching in O(1) time. * * Each child window of the root window is called a client in window manager * terminology, 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. There are no other data structures to organize the clients * in tag lists, because a single global list is most simple. All clients which * have at least one tag enabled of the current tags viewed, will be visible on * the screen, all other clients are banned to the x-location 2 * screen width. * This avoids having additional layers of workspace handling. * * For each client dwm creates a small title window which is resized whenever * the WM_NAME or _NET_WM_NAME properties are updated. * * Keys and tagging rules are organized as arrays as well 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. */ #include "config.h" #include /* mask shorthands, used in event.c and client.c */ #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask) #define MOUSEMASK (BUTTONMASK | PointerMotionMask) #define PROTODELWIN 1 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; 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]; unsigned long status[ColLast]; Drawable drawable; Fnt font; GC gc; } DC; /* draw context */ typedef struct Client Client; struct Client { char name[256]; int proto; int x, y, w, h; int tx, ty, tw, th; /* title window geometry */ int basew, baseh, incw, inch, maxw, maxh, minw, minh; int grav; long flags; unsigned int border, weight; Bool isfloat; Bool *tags; Client *next; Client *prev; Client *snext; Window win; Window twin; }; 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 mw, screen, sx, sy, sw, sh; /* screen geometry, master width */ extern unsigned int ntags, numlockmask; /* number of tags, dynamic lock mask */ extern void (*handler[LASTEvent])(XEvent *); /* event handler */ extern void (*arrange)(Arg *); /* arrange function, indicates mode */ extern Atom wmatom[WMLast], netatom[NetLast]; extern Bool running, issel, maximized, *seltag; /* seltag is array of Bool */ extern Client *clients, *sel, *stack; /* global cleint list and stack */ extern Cursor cursor[CurLast]; extern DC dc; /* global draw context */ extern Display *dpy; extern Window root, barwin; /* client.c */ extern void ban(Client *c); /* ban c from screen */ 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 gravitate(Client *c, Bool invert); /* gravitate c */ 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 updatesize(Client *c); /* update the size structs of c */ extern void updatetitle(Client *c); /* update the name of c */ extern void togglemax(Arg *arg); /* (un)maximize c */ extern void unmanage(Client *c); /* destroy c */ /* draw.c */ extern void drawall(); /* draw all visible client titles and the bar */ extern void drawstatus(); /* draw the bar */ extern void drawtitle(Client *c); /* draw title of c */ extern unsigned long getcolor(const char *colstr); /* return color of colstr */ extern void setfont(const char *fontstr); /* set the font for DC */ extern unsigned int textw(const char *text); /* return the width of text in px*/ /* event.c */ extern void grabkeys(); /* grab all keys defined in config.h */ extern void procevent(); /* process pending X events */ /* main.c */ 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 */ /* tag.c */ extern void initrregs(); /* initialize regexps of rules defined in config.h */ 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 */ extern void tag(Arg *arg); /* tags c with arg's index */ extern void toggletag(Arg *arg); /* toggles c tags 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 *erealloc(void *ptr, unsigned int size); /* reallocates memory, exits on error */ extern void spawn(Arg *arg); /* forks a new subprocess with to arg's cmd */ /* view.c */ extern void detach(Client *c); /* detaches c from global client list */ extern void dofloat(Arg *arg); /* arranges all windows floating, arg is ignored */ extern void dotile(Arg *arg); /* arranges all windows, arg is ignored */ 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 */ extern void resizecol(Arg *arg); /* resizes the master width with arg's index value */ extern void restack(); /* restores z layers of all clients */ 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 viewall(Arg *arg); /* views all tags, arg is ignored */ extern void zoom(Arg *arg); /* zooms the focused client to master column, arg is ignored */