event.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5
   6 #include <fcntl.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <X11/keysym.h>
  10 #include <X11/Xatom.h>
  11
  12 #include "wm.h"
  13
  14 /* local functions */
  15 static void buttonpress(XEvent *e);
  16 static void configurerequest(XEvent *e);
  17 static void destroynotify(XEvent *e);
  18 static void enternotify(XEvent *e);
  19 static void leavenotify(XEvent *e);
  20 static void expose(XEvent *e);
  21 static void keymapnotify(XEvent *e);
  22 static void maprequest(XEvent *e);
  23 static void propertynotify(XEvent *e);
  24 static void unmapnotify(XEvent *e);
  25
  26 void (*handler[LASTEvent]) (XEvent *) = {
  27         [ButtonPress] = buttonpress,
  28         [ConfigureRequest] = configurerequest,
  29         [DestroyNotify] = destroynotify,
  30         [EnterNotify] = enternotify,
  31         [LeaveNotify] = leavenotify,
  32         [Expose] = expose,
  33         [KeyPress] = keypress,
  34         [KeymapNotify] = keymapnotify,
  35         [MapRequest] = maprequest,
  36         [PropertyNotify] = propertynotify,
  37         [UnmapNotify] = unmapnotify
  38 };
  39
  40 unsigned int
  41 discard_events(long even_mask)
  42 {
  43         XEvent ev;
  44         unsigned int n = 0;
  45         while(XCheckMaskEvent(dpy, even_mask, &ev)) n++;
  46         return n;
  47 }
  48
  49 static void
  50 buttonpress(XEvent *e)
  51 {
  52         XButtonPressedEvent *ev = &e->xbutton;
  53         Client *c;
  54
  55         if((c = getclient(ev->window))) {
  56                 switch(ev->button) {
  57                 default:
  58                         break;
  59                 case Button1:
  60                         mmove(c);
  61                         break;
  62                 case Button2:
  63                         XLowerWindow(dpy, c->win);
  64                         break;
  65                 case Button3:
  66                         mresize(c);
  67                         break;
  68                 }
  69         }
  70 }
  71
  72 static void
  73 configurerequest(XEvent *e)
  74 {
  75         XConfigureRequestEvent *ev = &e->xconfigurerequest;
  76         XWindowChanges wc;
  77         Client *c;
  78
  79         ev->value_mask &= ~CWSibling;
  80         if((c = getclient(ev->window))) {
  81                 if(ev->value_mask & CWX)
  82                         c->x = ev->x;
  83                 if(ev->value_mask & CWY)
  84                         c->y = ev->y;
  85                 if(ev->value_mask & CWWidth)
  86                         c->w = ev->width;
  87                 if(ev->value_mask & CWHeight)
  88                         c->h = ev->height;
  89         }
  90
  91         wc.x = ev->x;
  92         wc.y = ev->y;
  93         wc.width = ev->width;
  94         wc.height = ev->height;
  95         wc.border_width = 0;
  96         wc.sibling = None;
  97         wc.stack_mode = Above;
  98         ev->value_mask &= ~CWStackMode;
  99         ev->value_mask |= CWBorderWidth;
 100         XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 101         XFlush(dpy);
 102 }
 103
 104 static void
 105 destroynotify(XEvent *e)
 106 {
 107         Client *c;
 108         XDestroyWindowEvent *ev = &e->xdestroywindow;
 109
 110         if((c = getclient(ev->window)))
 111                 unmanage(c);
 112 }
 113
 114 static void
 115 enternotify(XEvent *e)
 116 {
 117         XCrossingEvent *ev = &e->xcrossing;
 118         Client *c;
 119
 120         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 121                 return;
 122
 123         if((c = getclient(ev->window)))
 124                 focus(c);
 125         else if(ev->window == root) {
 126                 sel_screen = True;
 127                 /*draw_frames();*/
 128         }
 129 }
 130
 131 static void
 132 leavenotify(XEvent *e)
 133 {
 134         XCrossingEvent *ev = &e->xcrossing;
 135
 136         if((ev->window == root) && !ev->same_screen) {
 137                 sel_screen = True;
 138                 /*draw_frames();*/
 139         }
 140 }
 141
 142 static void
 143 expose(XEvent *e)
 144 {
 145         XExposeEvent *ev = &e->xexpose;
 146         Client *c;
 147
 148         if(ev->count == 0) {
 149                 if((c = gettitle(ev->window)))
 150                         draw_client(c);
 151                 else if(ev->window == barwin)
 152                         draw_bar();
 153         }
 154 }
 155
 156 static void
 157 keymapnotify(XEvent *e)
 158 {
 159         update_keys();
 160 }
 161
 162 static void
 163 maprequest(XEvent *e)
 164 {
 165         XMapRequestEvent *ev = &e->xmaprequest;
 166         static XWindowAttributes wa;
 167
 168         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 169                 return;
 170
 171         if(wa.override_redirect) {
 172                 XSelectInput(dpy, ev->window,
 173                                 (StructureNotifyMask | PropertyChangeMask));
 174                 return;
 175         }
 176
 177         if(!getclient(ev->window))
 178                 manage(ev->window, &wa);
 179 }
 180
 181 static void
 182 propertynotify(XEvent *e)
 183 {
 184         XPropertyEvent *ev = &e->xproperty;
 185         Client *c;
 186
 187         if(ev->state == PropertyDelete)
 188                 return; /* ignore */
 189
 190         if(ev->atom == wm_atom[WMProtocols]) {
 191                 c->proto = win_proto(c->win);
 192                 return;
 193         }
 194         if((c = getclient(ev->window))) {
 195                 switch (ev->atom) {
 196                         default: break;
 197                         case XA_WM_TRANSIENT_FOR:
 198                                 XGetTransientForHint(dpy, c->win, &c->trans);
 199                                 break;
 200                                 update_size(c);
 201                         case XA_WM_NORMAL_HINTS:
 202                                 update_size(c);
 203                                 break;
 204                 }
 205                 if(ev->atom == XA_WM_NAME || ev->atom == net_atom[NetWMName]) {
 206                         update_name(c);
 207                         if(c == stack)
 208                                 draw_bar();
 209                         else
 210                                 draw_client(c);
 211                 }
 212         }
 213 }
 214
 215 static void
 216 unmapnotify(XEvent *e)
 217 {
 218         Client *c;
 219         XUnmapEvent *ev = &e->xunmap;
 220
 221         if((c = getclient(ev->window)))
 222                 unmanage(c);
 223 }