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->r[RFloat].x = ev->x;
  83                 if(ev->value_mask & CWY)
  84                         c->r[RFloat].y = ev->y;
  85                 if(ev->value_mask & CWWidth)
  86                         c->r[RFloat].width = ev->width;
  87                 if(ev->value_mask & CWHeight)
  88                         c->r[RFloat].height = ev->height;
  89                 if(ev->value_mask & CWBorderWidth)
  90                         c->border = ev->border_width;
  91         }
  92
  93         wc.x = ev->x;
  94         wc.y = ev->y;
  95         wc.width = ev->width;
  96         wc.height = ev->height;
  97         wc.border_width = 0;
  98         wc.sibling = None;
  99         wc.stack_mode = Above;
 100         ev->value_mask &= ~CWStackMode;
 101         ev->value_mask |= CWBorderWidth;
 102         XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 103         XFlush(dpy);
 104 }
 105
 106 static void
 107 destroynotify(XEvent *e)
 108 {
 109         Client *c;
 110         XDestroyWindowEvent *ev = &e->xdestroywindow;
 111
 112         if((c = getclient(ev->window)))
 113                 unmanage(c);
 114 }
 115
 116 static void
 117 enternotify(XEvent *e)
 118 {
 119         XCrossingEvent *ev = &e->xcrossing;
 120         Client *c;
 121
 122         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 123                 return;
 124
 125         if((c = getclient(ev->window)))
 126                 focus(c);
 127         else if(ev->window == root) {
 128                 sel_screen = True;
 129                 /*draw_frames();*/
 130         }
 131 }
 132
 133 static void
 134 leavenotify(XEvent *e)
 135 {
 136         XCrossingEvent *ev = &e->xcrossing;
 137
 138         if((ev->window == root) && !ev->same_screen) {
 139                 sel_screen = True;
 140                 /*draw_frames();*/
 141         }
 142 }
 143
 144 static void
 145 expose(XEvent *e)
 146 {
 147         XExposeEvent *ev = &e->xexpose;
 148
 149         if(ev->count == 0) {
 150                 if(ev->window == barwin)
 151                         draw_bar();
 152         }
 153 }
 154
 155 static void
 156 keymapnotify(XEvent *e)
 157 {
 158         update_keys();
 159 }
 160
 161 static void
 162 maprequest(XEvent *e)
 163 {
 164         XMapRequestEvent *ev = &e->xmaprequest;
 165         static XWindowAttributes wa;
 166
 167         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 168                 return;
 169
 170         if(wa.override_redirect) {
 171                 XSelectInput(dpy, ev->window,
 172                                 (StructureNotifyMask | PropertyChangeMask));
 173                 return;
 174         }
 175
 176         if(!getclient(ev->window))
 177                 manage(ev->window, &wa);
 178 }
 179
 180 static void
 181 propertynotify(XEvent *e)
 182 {
 183         XPropertyEvent *ev = &e->xproperty;
 184         long msize;
 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                         case XA_WM_NORMAL_HINTS:
 201                                 if(!XGetWMNormalHints(dpy, c->win, &c->size, &msize)
 202                                                 || !c->size.flags)
 203                                         c->size.flags = PSize;
 204                                 if(c->size.flags & PMinSize && c->size.flags & PMaxSize
 205                                                 && c->size.min_width == c->size.max_width
 206                                                 && c->size.min_height == c->size.max_height)
 207                                         c->fixedsize = True;
 208                                 else
 209                                         c->fixedsize = False;
 210                                 break;
 211                 }
 212                 if(ev->atom == XA_WM_NAME || ev->atom == net_atom[NetWMName]) {
 213                         update_name(c);
 214                 }
 215         }
 216 }
 217
 218 static void
 219 unmapnotify(XEvent *e)
 220 {
 221         Client *c;
 222         XUnmapEvent *ev = &e->xunmap;
 223
 224         if((c = getclient(ev->window)))
 225                 unmanage(c);
 226 }