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 void
  41 discard_events(long even_mask)
  42 {
  43         XEvent ev;
  44         while(XCheckMaskEvent(dpy, even_mask, &ev));
  45 }
  46
  47 static void
  48 buttonpress(XEvent *e)
  49 {
  50         XButtonPressedEvent *ev = &e->xbutton;
  51         Client *c;
  52
  53         if((c = getclient(ev->window))) {
  54                 raise(c);
  55                 switch(ev->button) {
  56                 default:
  57                         break;
  58                 case Button1:
  59                         mmove(c);
  60                         break;
  61                 case Button2:
  62                         lower(c);
  63                         break;
  64                 case Button3:
  65                         mresize(c);
  66                         break;
  67                 }
  68         }
  69 }
  70
  71 static void
  72 configurerequest(XEvent *e)
  73 {
  74         XConfigureRequestEvent *ev = &e->xconfigurerequest;
  75         XWindowChanges wc;
  76         Client *c;
  77
  78         ev->value_mask &= ~CWSibling;
  79         if((c = getclient(ev->window))) {
  80                 if(ev->value_mask & CWX)
  81                         c->x = ev->x;
  82                 if(ev->value_mask & CWY)
  83                         c->y = ev->y;
  84                 if(ev->value_mask & CWWidth)
  85                         c->w = ev->width;
  86                 if(ev->value_mask & CWHeight)
  87                         c->h = ev->height;
  88         }
  89
  90         wc.x = ev->x;
  91         wc.y = ev->y;
  92         wc.width = ev->width;
  93         wc.height = ev->height;
  94         wc.border_width = 1;
  95         wc.sibling = None;
  96         wc.stack_mode = Above;
  97         ev->value_mask &= ~CWStackMode;
  98         ev->value_mask |= CWBorderWidth;
  99         XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 100         XFlush(dpy);
 101 }
 102
 103 static void
 104 destroynotify(XEvent *e)
 105 {
 106         Client *c;
 107         XDestroyWindowEvent *ev = &e->xdestroywindow;
 108
 109         if((c = getclient(ev->window)))
 110                 unmanage(c);
 111 }
 112
 113 static void
 114 enternotify(XEvent *e)
 115 {
 116         XCrossingEvent *ev = &e->xcrossing;
 117         Client *c;
 118
 119         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 120                 return;
 121
 122         if((c = getclient(ev->window)))
 123                 focus(c);
 124         else if(ev->window == root)
 125                 sel_screen = True;
 126 }
 127
 128 static void
 129 leavenotify(XEvent *e)
 130 {
 131         XCrossingEvent *ev = &e->xcrossing;
 132
 133         if((ev->window == root) && !ev->same_screen)
 134                 sel_screen = True;
 135 }
 136
 137 static void
 138 expose(XEvent *e)
 139 {
 140         XExposeEvent *ev = &e->xexpose;
 141         Client *c;
 142
 143         if(ev->count == 0) {
 144                 if((c = gettitle(ev->window)))
 145                         draw_client(c);
 146                 else if(ev->window == barwin)
 147                         draw_bar();
 148         }
 149 }
 150
 151 static void
 152 keymapnotify(XEvent *e)
 153 {
 154         update_keys();
 155 }
 156
 157 static void
 158 maprequest(XEvent *e)
 159 {
 160         XMapRequestEvent *ev = &e->xmaprequest;
 161         static XWindowAttributes wa;
 162
 163         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 164                 return;
 165
 166         if(wa.override_redirect) {
 167                 XSelectInput(dpy, ev->window,
 168                                 (StructureNotifyMask | PropertyChangeMask));
 169                 return;
 170         }
 171
 172         if(!getclient(ev->window))
 173                 manage(ev->window, &wa);
 174 }
 175
 176 static void
 177 propertynotify(XEvent *e)
 178 {
 179         XPropertyEvent *ev = &e->xproperty;
 180         Client *c;
 181
 182         if(ev->state == PropertyDelete)
 183                 return; /* ignore */
 184
 185         if(ev->atom == wm_atom[WMProtocols]) {
 186                 c->proto = win_proto(c->win);
 187                 return;
 188         }
 189         if((c = getclient(ev->window))) {
 190                 switch (ev->atom) {
 191                         default: break;
 192                         case XA_WM_TRANSIENT_FOR:
 193                                 XGetTransientForHint(dpy, c->win, &c->trans);
 194                                 break;
 195                                 update_size(c);
 196                         case XA_WM_NORMAL_HINTS:
 197                                 update_size(c);
 198                                 break;
 199                 }
 200                 if(ev->atom == XA_WM_NAME || ev->atom == net_atom[NetWMName]) {
 201                         update_name(c);
 202                         if(c == stack)
 203                                 draw_bar();
 204                         else
 205                                 draw_client(c);
 206                 }
 207         }
 208 }
 209
 210 static void
 211 unmapnotify(XEvent *e)
 212 {
 213         Client *c;
 214         XUnmapEvent *ev = &e->xunmap;
 215
 216         if((c = getclient(ev->window)))
 217                 unmanage(c);
 218 }