ba41f55638260aa35acda3f153b38cfcf429b909
[dwm.git] / 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 = getclient(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 }