-/* See LICENSE file for copyright and license details. */
+/* See LICENSE file for copyright and 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 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.
+ *
+ * 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
+ * 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
+ * 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 layout is
+ * represented by the lt pointer.
+ *
+ * To understand everything else, start reading main().
+ */
#include <errno.h>
#include <locale.h>
#include <regex.h>
} Regs;
/* functions */
-static void eprint(const char *errstr, ...);
-static void *emallocz(unsigned int size);
-static void spawn(const char *arg);
-static void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
-static unsigned long initcolor(const char *colstr);
-static void initfont(const char *fontstr);
-static Bool isoccupied(unsigned int t);
-static unsigned int textnw(const char *text, unsigned int len);
-static void drawtext(const char *text, unsigned long col[ColLast]);
-static void drawbar(void);
-static void initstyle(void);
-static void initbar(void);
-static unsigned int textw(const char *text);
-static void togglebar(const char *arg);
-static void updatebarpos(void);
+
+static void applyrules(Client *c);
+static void arrange(void);
+static void attach(Client *c);
static void attachstack(Client *c);
-static void detachstack(Client *c);
-static void grabbuttons(Client *c, Bool focused);
-static Bool isprotodel(Client *c);
-static void setclientstate(Client *c, long state);
-static int xerrordummy(Display *dsply, XErrorEvent *ee);
static void ban(Client *c);
-static void configure(Client *c);
-static void killclient(const char *arg);
-static void manage(Window w, XWindowAttributes *wa);
-static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
-static void unban(Client *c);
-static void unmanage(Client *c);
-static void updatesizehints(Client *c);
-static void updatetitle(Client *c);
-static Client *getclient(Window w);
-static void movemouse(Client *c);
-static void resizemouse(Client *c);
static void buttonpress(XEvent *e);
-static void configurerequest(XEvent *e);
+static void cleanup(void);
+static void compileregs(void);
+static void configure(Client *c);
static void configurenotify(XEvent *e);
+static void configurerequest(XEvent *e);
static void destroynotify(XEvent *e);
+static void detach(Client *c);
+static void detachstack(Client *c);
+static void drawbar(void);
+static void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
+static void drawtext(const char *text, unsigned long col[ColLast]);
+static void *emallocz(unsigned int size);
static void enternotify(XEvent *e);
+static void eprint(const char *errstr, ...);
static void expose(XEvent *e);
-static void keypress(XEvent *e);
-static void leavenotify(XEvent *e);
-static void mappingnotify(XEvent *e);
-static void maprequest(XEvent *e);
-static void propertynotify(XEvent *e);
-static void unmapnotify(XEvent *e);
-static unsigned int idxoftag(const char *tag);
static void floating(void); /* default floating layout */
-static void applyrules(Client *c);
-static void compileregs(void);
+static void focus(Client *c);
static void focusnext(const char *arg);
static void focusprev(const char *arg);
+static Client *getclient(Window w);
+static long getstate(Window w);
+static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
+static void grabbuttons(Client *c, Bool focused);
+static unsigned int idxoftag(const char *tag);
+static void initbar(void);
+static unsigned long initcolor(const char *colstr);
+static void initfont(const char *fontstr);
static void initlayouts(void);
+static void initstyle(void);
+static Bool isarrange(void (*func)());
static Bool isfloating(void);
+static Bool isoccupied(unsigned int t);
+static Bool isprotodel(Client *c);
static Bool isvisible(Client *c);
+static void keypress(XEvent *e);
+static void killclient(const char *arg);
+static void leavenotify(XEvent *e);
+static void manage(Window w, XWindowAttributes *wa);
+static void mappingnotify(XEvent *e);
+static void maprequest(XEvent *e);
+static void movemouse(Client *c);
+static Client *nexttiled(Client *c);
+static void propertynotify(XEvent *e);
+static void quit(const char *arg);
+static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
+static void resizemouse(Client *c);
static void restack(void);
+static void scan(void);
+static void setclientstate(Client *c, long state);
static void setlayout(const char *arg);
+static void setmwfact(const char *arg);
+static void setup(void);
+static void spawn(const char *arg);
static void tag(const char *arg);
+static unsigned int textnw(const char *text, unsigned int len);
+static unsigned int textw(const char *text);
+static void tile(void);
+static void togglebar(const char *arg);
static void togglefloating(const char *arg);
static void togglemax(const char *arg);
static void toggletag(const char *arg);
static void toggleview(const char *arg);
+static void unban(Client *c);
+static void unmanage(Client *c);
+static void unmapnotify(XEvent *e);
+static void updatebarpos(void);
+static void updatesizehints(Client *c);
+static void updatetitle(Client *c);
static void view(const char *arg);
-static void cleanup(void);
-static long getstate(Window w);
-static void scan(void);
-static void setup(void);
-static int xerrorstart(Display *dsply, XErrorEvent *ee);
-static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
-static void quit(const char *arg);
static int xerror(Display *dpy, XErrorEvent *ee);
-static void arrange(void);
-static void attach(Client *c);
-static void detach(Client *c);
-static void focus(Client *c);
-static Bool isarrange(void (*func)());
-static Client *nexttiled(Client *c);
-static void setmwfact(const char *arg);
-static void tile(void);
+static int xerrordummy(Display *dsply, XErrorEvent *ee);
+static int xerrorstart(Display *dsply, XErrorEvent *ee);
static void zoom(const char *arg);
#include "config.h"
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