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179 lines
7.9 KiB
179 lines
7.9 KiB
/* |
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* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com> |
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* See LICENSE file for license details. |
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* |
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* dynamic window manager is designed like any other X client as well. It is |
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* driven through handling X events. In contrast to other X clients, a window |
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* manager like dwm selects for SubstructureRedirectMask on the root window, to |
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* receive events about child window appearance and disappearance. Only one X |
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* connection at a time is allowed to select for this event mask by any X |
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* server, thus only one window manager instance can be executed at a time. |
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* Any attempt to select for SubstructureRedirectMask by any connection after |
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* another connection already selected for those events, will result in an |
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* error generated by the server. Such errors are reported through calling the |
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* current X error handler. |
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* |
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* Calls to pop an X event from the event queue of the X connection are |
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* blocking. Due the fact, that dwm reads status text from standard input, a |
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* select-driven main loop has been implemented which selects for reads on the |
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* X connection and STDIN_FILENO to handle all data smoothly and without |
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* busy-loop quirks.. The event handlers of dwm are organized in an array |
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* which is accessed whenever a new event has been popped. This allows event |
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* dispatching in O(1) time. |
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* |
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* Each child window of the root window is called a client in window manager |
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* terminology, except windows which have set the override_redirect flag. |
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* Clients are organized in a global doubly-linked client list, the focus |
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* history is remembered through a global stack list. Each client contains an |
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* array of Bools of the same size as the global tags array to indicate the |
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* tags of a client. There are no other data structures to organize the clients |
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* in tag lists, because a single global list is most simple. All clients which |
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* have at least one tag enabled of the current tags viewed, will be visible on |
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* the screen, all other clients are banned to the x-location 2 * screen width. |
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* This avoids having additional layers of workspace handling. |
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* |
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* For each client dwm creates a small title window which is resized whenever |
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* the WM_NAME or _NET_WM_NAME properties are updated. |
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* |
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* Keys and tagging rules are organized as arrays as well and defined in the |
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* config.h file. These arrays are kept static in event.o and tag.o |
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* respectively, because no other part of dwm needs access to them. |
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* |
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* The current mode is represented by the arrange function pointer which wether |
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* points to dofloat or dotile. |
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*/ |
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#include "config.h" |
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#include <X11/Xlib.h> |
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/* mask shorthands, used in event.c and client.c */ |
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#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask) |
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#define MOUSEMASK (BUTTONMASK | PointerMotionMask) |
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#define PROTODELWIN 1 |
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enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */ |
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enum { WMProtocols, WMDelete, WMLast }; /* default atoms */ |
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enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */ |
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enum { ColFG, ColBG, ColLast }; /* color */ |
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typedef enum { |
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TopLeft, TopRight, BotLeft, BotRight |
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} Corner; /* window corners */ |
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typedef union { |
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const char *cmd; |
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int i; |
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} Arg; /* argument type */ |
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typedef struct { |
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int ascent; |
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int descent; |
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int height; |
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XFontSet set; |
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XFontStruct *xfont; |
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} Fnt; |
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typedef struct { |
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int x, y, w, h; |
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unsigned long norm[ColLast]; |
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unsigned long sel[ColLast]; |
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unsigned long status[ColLast]; |
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Drawable drawable; |
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Fnt font; |
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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; |
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int x, y, w, h; |
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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; |
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int grav; |
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long flags; |
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unsigned int border, weight; |
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Bool isfloat; |
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Bool *tags; |
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Client *next; |
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Client *prev; |
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Client *snext; |
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Window win; |
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Window twin; |
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}; |
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extern const char *tags[]; /* all tags */ |
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extern char stext[1024]; /* status text */ |
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extern int bx, by, bw, bh, bmw; /* bar geometry, bar mode label width */ |
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extern int mw, screen, sx, sy, sw, sh; /* screen geometry, master width */ |
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extern unsigned int ntags, numlockmask; /* number of tags, dynamic lock mask */ |
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extern void (*handler[LASTEvent])(XEvent *); /* event handler */ |
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extern void (*arrange)(Arg *); /* arrange function, indicates mode */ |
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extern Atom wmatom[WMLast], netatom[NetLast]; |
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extern Bool running, issel, maximized, *seltag; /* seltag is array of Bool */ |
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extern Client *clients, *sel, *stack; /* global cleint list and stack */ |
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extern Cursor cursor[CurLast]; |
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extern DC dc; /* global draw context */ |
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extern Display *dpy; |
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extern Window root, barwin; |
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/* client.c */ |
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extern void ban(Client *c); /* ban c from screen */ |
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extern void focus(Client *c); /* focus c, c may be NULL */ |
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extern Client *getclient(Window w); /* return client of w */ |
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extern Client *getctitle(Window w); /* return client of title window */ |
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extern void gravitate(Client *c, Bool invert); /* gravitate c */ |
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extern void killclient(Arg *arg); /* kill c nicely */ |
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extern void manage(Window w, XWindowAttributes *wa); /* manage new client */ |
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extern void resize(Client *c, Bool sizehints, Corner sticky); /* resize c*/ |
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extern void updatesize(Client *c); /* update the size structs of c */ |
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extern void updatetitle(Client *c); /* update the name of c */ |
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extern void togglemax(Arg *arg); /* (un)maximize 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(); /* draw all visible client titles and the bar */ |
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extern void drawstatus(); /* draw the bar */ |
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extern void drawtitle(Client *c); /* draw title of c */ |
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extern unsigned long getcolor(const char *colstr); /* return color of colstr */ |
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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(); /* grab all keys defined in config.h */ |
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extern void procevent(); /* 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 */ |
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extern void quit(Arg *arg); /* quit dwm nicely */ |
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extern void sendevent(Window w, Atom a, long value); /* send synthetic event to w */ |
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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(); /* initialize regexps of rules defined in config.h */ |
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extern Client *getnext(Client *c); /* returns next visible client */ |
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extern Client *getprev(Client *c); /* returns previous visible client */ |
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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 */ |
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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 */ |
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/* view.c */ |
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extern void detach(Client *c); /* detaches c from global client list */ |
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extern void dofloat(Arg *arg); /* arranges all windows floating, arg is ignored */ |
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extern void dotile(Arg *arg); /* arranges all windows, arg is ignored */ |
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extern void focusnext(Arg *arg); /* focuses next visible client, arg is ignored */ |
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extern void focusprev(Arg *arg); /* focuses previous visible client, arg is ignored */ |
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extern Bool isvisible(Client *c); /* returns True if client is visible */ |
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extern void resizecol(Arg *arg); /* resizes the master width with arg's index value */ |
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extern void restack(); /* restores z layers of all clients */ |
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extern void togglemode(Arg *arg); /* toggles global arrange function (dotile/dofloat) */ |
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extern void toggleview(Arg *arg); /* toggles the tag with arg's index (in)visible */ |
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extern void view(Arg *arg); /* views the tag with arg's index */ |
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extern void viewall(Arg *arg); /* views all tags, arg is ignored */ |
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extern void zoom(Arg *arg); /* zooms the focused client to master column, arg is ignored */
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