Mercurial > dwm-meillo
annotate dwm.h @ 457:e97ad13f04dc
added a general comment to dwm.h how dwm is basically organized
| author | Anselm R. Garbe <arg@10kloc.org> |
|---|---|
| date | Tue, 12 Sep 2006 08:14:22 +0200 |
| parents | d11d739ad9df |
| children | 3c3f429dca99 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com> | |
| 3 * See LICENSE file for license details. | |
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4 * |
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5 * dynamic window manager is designed like any other X client as well. It is |
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6 * driven through handling X events. In contrast to other X clients, a window |
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7 * manager like dwm selects for SubstructureRedirectMask on the root window, to |
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8 * receive events about child window appearance and disappearance. Only one X |
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9 * connection at a time is allowed to select for this event mask by any X |
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10 * server, thus only one window manager instance can be executed at a time. |
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11 * Any attempt to select for SubstructureRedirectMask by any connection after |
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12 * another connection already selected for those events, will result in an |
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13 * error generated by the server. Such errors are reported through calling the |
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14 * current X error handler. |
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15 * |
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16 * Calls to pop an X event from the event queue of the X connection are |
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17 * blocking. Due the fact, that dwm reads status text from standard input, a |
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18 * select-driven main loop has been implemented which selects for reads on the |
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19 * X connection and STDIN_FILENO to handle all data smoothly and without |
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20 * busy-loop quirks.. The event handlers of dwm are organized in an array |
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21 * which is accessed whenever a new event has been popped. This allows event |
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22 * dispatching in O(1) time. |
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23 * |
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24 * Each child window of the root window is called a client in window manager |
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25 * terminology, except windows which have set the override_redirect flag. |
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26 * Clients are organized in a global doubly-linked client list, the focus |
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27 * history is remembered through a global stack list. Each client contains an |
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28 * array of Bools of the same size as the global tags array to indicate the |
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29 * tags of a client. There are no other data structures to organize the clients |
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30 * in tag lists, because a single global list is most simple. All clients which |
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31 * have at least one tag enabled of the current tags viewed, will be visible on |
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32 * the screen, all other clients are banned to the x-location 2 * screen width. |
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33 * This avoids having additional layers of workspace handling. |
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34 * |
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35 * For each client dwm creates a small title window which is resized whenever |
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36 * the WM_NAME or _NET_WM_NAME properties are updated. |
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37 * |
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38 * Keys and tagging rules are organized as arrays as well and defined in the |
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39 * config.h file. These arrays are kept static in event.o and tag.o |
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40 * respectively, because no other part of dwm needs access to them. |
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41 * |
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42 * The current mode is represented by the arrange function pointer which wether |
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43 * points to dofloat or dotile. |
| 0 | 44 */ |
| 45 | |
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46 #include "config.h" |
| 32 | 47 #include <X11/Xlib.h> |
| 48 | |
| 143 | 49 /* mask shorthands, used in event.c and client.c */ |
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50 #define BUTTONMASK (ButtonPressMask | ButtonReleaseMask) |
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51 #define MOUSEMASK (BUTTONMASK | PointerMotionMask) |
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52 #define PROTODELWIN 1 |
| 143 | 53 |
| 452 | 54 enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */ |
| 55 enum { WMProtocols, WMDelete, WMLast }; /* default atoms */ | |
| 56 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */ | |
| 57 enum { ColFG, ColBG, ColLast }; /* color */ | |
| 58 | |
| 59 typedef enum { | |
| 60 TopLeft, TopRight, BotLeft, BotRight | |
| 61 } Corner; /* window corners */ | |
| 62 | |
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63 typedef union { |
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64 const char *cmd; |
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49
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65 int i; |
| 452 | 66 } Arg; /* argument type */ |
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67 |
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68 typedef struct { |
| 32 | 69 int ascent; |
| 70 int descent; | |
| 71 int height; | |
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72 XFontSet set; |
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73 XFontStruct *xfont; |
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74 } Fnt; |
| 32 | 75 |
| 452 | 76 typedef struct { |
| 32 | 77 int x, y, w, h; |
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78 unsigned long norm[ColLast]; |
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79 unsigned long sel[ColLast]; |
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80 unsigned long status[ColLast]; |
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81 Drawable drawable; |
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82 Fnt font; |
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83 GC gc; |
| 452 | 84 } DC; /* draw context */ |
| 32 | 85 |
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86 typedef struct Client Client; |
| 0 | 87 struct Client { |
| 31 | 88 char name[256]; |
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89 int proto; |
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90 int x, y, w, h; |
| 453 | 91 int tx, ty, tw, th; /* title window geometry */ |
| 20 | 92 int basew, baseh, incw, inch, maxw, maxh, minw, minh; |
| 29 | 93 int grav; |
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94 long flags; |
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95 unsigned int border, weight; |
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96 Bool isfloat; |
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97 Bool *tags; |
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98 Client *next; |
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99 Client *prev; |
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100 Client *snext; |
| 0 | 101 Window win; |
| 342 | 102 Window twin; |
| 0 | 103 }; |
| 104 | |
| 452 | 105 extern const char *tags[]; /* all tags */ |
| 106 extern char stext[1024]; /* status text */ | |
| 107 extern int bx, by, bw, bh, bmw; /* bar geometry, bar mode label width */ | |
| 108 extern int mw, screen, sx, sy, sw, sh; /* screen geometry, master width */ | |
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109 extern unsigned int ntags, numlockmask; /* number of tags, dynamic lock mask */ |
| 452 | 110 extern void (*handler[LASTEvent])(XEvent *); /* event handler */ |
| 111 extern void (*arrange)(Arg *); /* arrange function, indicates mode */ | |
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112 extern Atom wmatom[WMLast], netatom[NetLast]; |
| 452 | 113 extern Bool running, issel, maximized, *seltag; /* seltag is array of Bool */ |
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114 extern Client *clients, *sel, *stack; /* global cleint list and stack */ |
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115 extern Cursor cursor[CurLast]; |
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116 extern DC dc; /* global draw context */ |
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117 extern Display *dpy; |
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118 extern Window root, barwin; |
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119 |
| 5 | 120 /* client.c */ |
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121 extern void ban(Client *c); /* ban c from screen */ |
| 452 | 122 extern void focus(Client *c); /* focus c, c may be NULL */ |
| 123 extern Client *getclient(Window w); /* return client of w */ | |
| 124 extern Client *getctitle(Window w); /* return client of title window */ | |
| 125 extern void gravitate(Client *c, Bool invert); /* gravitate c */ | |
| 126 extern void killclient(Arg *arg); /* kill c nicely */ | |
| 127 extern void manage(Window w, XWindowAttributes *wa); /* manage new client */ | |
| 128 extern void resize(Client *c, Bool sizehints, Corner sticky); /* resize c*/ | |
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129 extern void updatesize(Client *c); /* update the size structs of c */ |
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130 extern void updatetitle(Client *c); /* update the name of c */ |
| 452 | 131 extern void togglemax(Arg *arg); /* (un)maximize c */ |
| 132 extern void unmanage(Client *c); /* destroy c */ | |
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133 |
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134 /* draw.c */ |
| 452 | 135 extern void drawall(); /* draw all visible client titles and the bar */ |
| 136 extern void drawstatus(); /* draw the bar */ | |
| 137 extern void drawtitle(Client *c); /* draw title of c */ | |
| 138 extern unsigned long getcolor(const char *colstr); /* return color of colstr */ | |
| 139 extern void setfont(const char *fontstr); /* set the font for DC */ | |
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140 extern unsigned int textw(const char *text); /* return the width of text in px*/ |
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141 |
| 75 | 142 /* event.c */ |
| 452 | 143 extern void grabkeys(); /* grab all keys defined in config.h */ |
| 144 extern void procevent(); /* process pending X events */ | |
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145 |
| 43 | 146 /* main.c */ |
| 452 | 147 extern int getproto(Window w); /* return protocol mask of WMProtocols property of w */ |
| 148 extern void quit(Arg *arg); /* quit dwm nicely */ | |
| 149 extern void sendevent(Window w, Atom a, long value); /* send synthetic event to w */ | |
| 150 extern int xerror(Display *dsply, XErrorEvent *ee); /* dwm's X error handler */ | |
| 43 | 151 |
| 75 | 152 /* tag.c */ |
| 452 | 153 extern void initrregs(); /* initialize regexps of rules defined in config.h */ |
| 154 extern Client *getnext(Client *c); /* returns next visible client */ | |
| 155 extern Client *getprev(Client *c); /* returns previous visible client */ | |
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156 extern void settags(Client *c, Client *trans); /* sets tags of c */ |
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157 extern void tag(Arg *arg); /* tags c with arg's index */ |
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158 extern void toggletag(Arg *arg); /* toggles c tags with arg's index */ |
| 73 | 159 |
| 32 | 160 /* util.c */ |
| 452 | 161 extern void *emallocz(unsigned int size); /* allocates zero-initialized memory, exits on error */ |
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162 extern void eprint(const char *errstr, ...); /* prints errstr and exits with 1 */ |
| 452 | 163 extern void *erealloc(void *ptr, unsigned int size); /* reallocates memory, exits on error */ |
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164 extern void spawn(Arg *arg); /* forks a new subprocess with to arg's cmd */ |
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165 |
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166 /* view.c */ |
| 452 | 167 extern void detach(Client *c); /* detaches c from global client list */ |
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168 extern void dofloat(Arg *arg); /* arranges all windows floating, arg is ignored */ |
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169 extern void dotile(Arg *arg); /* arranges all windows, arg is ignored */ |
| 452 | 170 extern void focusnext(Arg *arg); /* focuses next visible client, arg is ignored */ |
| 171 extern void focusprev(Arg *arg); /* focuses previous visible client, arg is ignored */ | |
| 172 extern Bool isvisible(Client *c); /* returns True if client is visible */ | |
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173 extern void resizecol(Arg *arg); /* resizes the master width with arg's index value */ |
| 452 | 174 extern void restack(); /* restores z layers of all clients */ |
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175 extern void togglemode(Arg *arg); /* toggles global arrange function (dotile/dofloat) */ |
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176 extern void toggleview(Arg *arg); /* toggles the tag with arg's index (in)visible */ |
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177 extern void view(Arg *arg); /* views the tag with arg's index */ |
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178 extern void viewall(Arg *arg); /* views all tags, arg is ignored */ |
| 452 | 179 extern void zoom(Arg *arg); /* zooms the focused client to master column, arg is ignored */ |