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152 lines
6.6 KiB
152 lines
6.6 KiB
/* (C)opyright MMVI-MMVII 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 selects for SubstructureRedirectMask on the root window, to receive |
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* events about window (dis-)appearance. Only one X connection at a time is |
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* allowed to select for this event mask. |
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* |
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* Calls to fetch an X event from the event queue are blocking. Due reading |
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* 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 |
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* handle all data smoothly. The event handlers of dwm are organized in an |
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* array which is accessed whenever a new event has been fetched. This allows |
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* event dispatching in O(1) time. |
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* |
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* Each child of the root window is called a client, except windows which have |
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* set the override_redirect flag. Clients are organized in a global |
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* doubly-linked client list, the focus history is remembered through a global |
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* stack list. Each client contains an array of Bools of the same size as the |
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* 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 |
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* properties are updated or the client is moved/resized. |
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* |
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* Keys and tagging rules are organized as arrays and defined in the config.h |
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* file. These arrays are kept static in event.o and tag.o respectively, |
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* because no other part of dwm needs access to them. The current layout is |
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* represented by the lt pointer. |
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* |
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* To understand everything else, start reading main.c:main(). |
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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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enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */ |
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enum { WMProtocols, WMDelete, WMState, WMLast }; /* default atoms */ |
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enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */ |
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enum { ColBorder, ColFG, ColBG, ColLast }; /* color */ |
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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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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 x, y, w, h; |
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int rx, ry, rw, rh; /* revert geometry */ |
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int basew, baseh, incw, inch, maxw, maxh, minw, minh; |
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int minax, minay, maxax, maxay; |
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long flags; |
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unsigned int border; |
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Bool isbanned, isfixed, ismax, isversatile; |
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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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}; |
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typedef struct { |
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const char *symbol; |
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void (*arrange)(void); |
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} Layout; |
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extern const char *tags[]; /* all tags */ |
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extern char stext[256]; /* status text */ |
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extern int screen, sx, sy, sw, sh; /* screen geometry */ |
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extern int wax, way, wah, waw; /* windowarea geometry */ |
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extern unsigned int bh, blw; /* bar height, bar layout label 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 Atom wmatom[WMLast], netatom[NetLast]; |
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extern Bool selscreen, *seltag; /* seltag is array of Bool */ |
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extern Client *clients, *sel, *stack; /* global client 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 Layout *lt; |
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extern Window root, barwin; |
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/* client.c */ |
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extern void attach(Client *c); /* attaches c to global client list */ |
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extern void configure(Client *c); /* send synthetic configure event */ |
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extern void detach(Client *c); /* detaches c from global client list */ |
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extern void focus(Client *c); /* focus c, c may be NULL */ |
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extern void killclient(const char *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, int x, int y, |
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int w, int h, Bool sizehints); /* resize with given coordinates c*/ |
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extern void toggleversatile(const char *arg); /* toggles focused client between versatile/and non-versatile state */ |
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extern void updatesizehints(Client *c); /* update the size hint variables of c */ |
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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 drawstatus(void); /* draw the bar */ |
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extern void drawtext(const char *text, unsigned long col[ColLast]); /* draw text */ |
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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 */ |
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/* layout.c */ |
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extern void focusnext(const char *arg); /* focuses next visible client, arg is ignored */ |
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extern void focusprev(const char *arg); /* focuses previous visible client, arg is ignored */ |
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extern void incmasterw(const char *arg); /* increments the master width with arg's index value */ |
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extern void incnmaster(const char *arg); /* increments nmaster with arg's index value */ |
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extern void initlayouts(void); /* initialize layout array */ |
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extern Client *nexttiled(Client *c); /* returns tiled successor of c */ |
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extern void restack(void); /* restores z layers of all clients */ |
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extern void setlayout(const char *arg); /* sets layout, -1 toggles */ |
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extern void togglemax(const char *arg); /* toggles maximization of versatile client */ |
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extern void versatile(void); /* arranges all windows versatile */ |
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extern void zoom(const char *arg); /* zooms the focused client to master area, arg is ignored */ |
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/* main.c */ |
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extern void quit(const char *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 compileregs(void); /* initialize regexps of rules defined in config.h */ |
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extern Bool isvisible(Client *c); /* returns True if client is visible */ |
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extern void settags(Client *c, Client *trans); /* sets tags of c */ |
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extern void tag(const char *arg); /* tags c with arg's index */ |
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extern void toggletag(const char *arg); /* toggles c tags with arg's index */ |
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extern void toggleview(const char *arg); /* toggles the tag with arg's index (in)visible */ |
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extern void view(const char *arg); /* views the tag 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 spawn(const char *arg); /* forks a new subprocess with arg's cmd */ |
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