client.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 <stdlib.h>
   7 #include <string.h>
   8 #include <X11/Xatom.h>
   9
  10 #include "util.h"
  11 #include "wm.h"
  12
  13 #define CLIENT_MASK             (StructureNotifyMask | PropertyChangeMask | EnterWindowMask)
  14
  15 void
  16 update_name(Client *c)
  17 {
  18         XTextProperty name;
  19         int n;
  20         char **list = NULL;
  21
  22         name.nitems = 0;
  23         c->name[0] = 0;
  24         XGetTextProperty(dpy, c->win, &name, net_atom[NetWMName]);
  25         if(!name.nitems)
  26                 XGetWMName(dpy, c->win, &name);
  27         if(!name.nitems)
  28                 return;
  29         if(name.encoding == XA_STRING)
  30                 strncpy(c->name, (char *)name.value, sizeof(c->name));
  31         else {
  32                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
  33                                 && n > 0 && *list)
  34                 {
  35                         strncpy(c->name, *list, sizeof(c->name));
  36                         XFreeStringList(list);
  37                 }
  38         }
  39         XFree(name.value);
  40 }
  41
  42 void
  43 update_size(Client *c)
  44 {
  45         XSizeHints size;
  46         long msize;
  47         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
  48                 size.flags = PSize;
  49         c->flags = size.flags;
  50         if(c->flags & PBaseSize) {
  51                 c->basew = size.base_width;
  52                 c->baseh = size.base_height;
  53         }
  54         else
  55                 c->basew = c->baseh = 0;
  56         if(c->flags & PResizeInc) {
  57                 c->incw = size.width_inc;
  58                 c->inch = size.height_inc;
  59         }
  60         else
  61                 c->incw = c->inch = 0;
  62         if(c->flags & PMaxSize) {
  63                 c->maxw = size.max_width;
  64                 c->maxh = size.max_height;
  65         }
  66         else
  67                 c->maxw = c->maxh = 0;
  68         if(c->flags & PMinSize) {
  69                 c->minw = size.min_width;
  70                 c->minh = size.min_height;
  71         }
  72         else
  73                 c->minw = c->minh = 0;
  74 }
  75
  76 void
  77 focus(Client *c)
  78 {
  79         Client **l, *old;
  80
  81         old = stack;
  82         for(l=&stack; *l && *l != c; l=&(*l)->snext);
  83         eassert(*l == c);
  84         *l = c->snext;
  85         c->snext = stack;
  86         stack = c;
  87         XRaiseWindow(dpy, c->win);
  88         XRaiseWindow(dpy, c->title);
  89         XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
  90         if(old && old != c) {
  91                 XMapWindow(dpy, old->title);
  92                 draw_client(old);
  93         }
  94         XUnmapWindow(dpy, c->title);
  95         draw_bar();
  96         XFlush(dpy);
  97 }
  98
  99 void
 100 manage(Window w, XWindowAttributes *wa)
 101 {
 102         Client *c, **l;
 103         XSetWindowAttributes twa;
 104
 105         c = emallocz(sizeof(Client));
 106         c->win = w;
 107         c->tx = c->x = wa->x;
 108         c->ty = c->y = wa->y;
 109         c->tw = c->w = wa->width;
 110         c->h = wa->height;
 111         c->th = barrect.height;
 112         update_size(c);
 113         XSetWindowBorderWidth(dpy, c->win, 1);
 114         XSetWindowBorder(dpy, c->win, brush.border);
 115         XSelectInput(dpy, c->win, CLIENT_MASK);
 116         XGetTransientForHint(dpy, c->win, &c->trans);
 117         twa.override_redirect = 1;
 118         twa.background_pixmap = ParentRelative;
 119         twa.event_mask = SubstructureNotifyMask | ExposureMask;
 120
 121         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 122                         0, DefaultDepth(dpy, screen), CopyFromParent,
 123                         DefaultVisual(dpy, screen),
 124                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 125         update_name(c);
 126
 127         for(l=&clients; *l; l=&(*l)->next);
 128         c->next = *l; /* *l == nil */
 129         *l = c;
 130         c->snext = stack;
 131         stack = c;
 132         XMapWindow(dpy, c->win);
 133         XMapWindow(dpy, c->title);
 134         XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
 135                         GrabModeAsync, GrabModeSync, None, None);
 136         XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
 137                         GrabModeAsync, GrabModeSync, None, None);
 138         XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
 139                         GrabModeAsync, GrabModeSync, None, None);
 140         resize(c);
 141         focus(c);
 142 }
 143
 144 void
 145 resize(Client *c)
 146 {
 147         XConfigureEvent e;
 148
 149         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 150         e.type = ConfigureNotify;
 151         e.event = c->win;
 152         e.window = c->win;
 153         e.x = c->x;
 154         e.y = c->y;
 155         e.width = c->w;
 156         e.height = c->h;
 157         e.border_width = 0;
 158         e.above = None;
 159         e.override_redirect = False;
 160         XSelectInput(dpy, c->win, CLIENT_MASK & ~StructureNotifyMask);
 161         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
 162         XSelectInput(dpy, c->win, CLIENT_MASK);
 163         XFlush(dpy);
 164 }
 165
 166 static int
 167 dummy_error_handler(Display *dpy, XErrorEvent *error)
 168 {
 169         return 0;
 170 }
 171
 172 void
 173 unmanage(Client *c)
 174 {
 175         Client **l;
 176
 177         XGrabServer(dpy);
 178         XSetErrorHandler(dummy_error_handler);
 179
 180         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 181         XDestroyWindow(dpy, c->title);
 182
 183         for(l=&clients; *l && *l != c; l=&(*l)->next);
 184         eassert(*l == c);
 185         *l = c->next;
 186         for(l=&stack; *l && *l != c; l=&(*l)->snext);
 187         eassert(*l == c);
 188         *l = c->snext;
 189         free(c);
 190
 191         XFlush(dpy);
 192         XSetErrorHandler(error_handler);
 193         XUngrabServer(dpy);
 194         discard_events(EnterWindowMask);
 195         if(stack)
 196                 focus(stack);
 197 }
 198
 199
 200 Client *
 201 getclient(Window w)
 202 {
 203         Client *c;
 204         for(c = clients; c; c = c->next)
 205                 if(c->win == w)
 206                         return c;
 207         return NULL;
 208 }
 209
 210 void
 211 draw_client(Client *c)
 212 {
 213         if(c == stack)
 214                 draw_bar();
 215
 216         c->tw = textwidth(&brush.font, c->name) + labelheight(&brush.font);
 217         c->tx = c->x + c->w - c->tw + 2;
 218         c->ty = c->y;
 219         XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
 220
 221         brush.rect.x = brush.rect.y = 0;
 222         brush.rect.width = c->tw;
 223         brush.rect.height = c->th;
 224
 225         draw(dpy, &brush, True, c->name);
 226         XCopyArea(dpy, brush.drawable, c->title, brush.gc,
 227                         0, 0, c->tw, c->th, 0, 0);
 228         XFlush(dpy);
 229 }