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         discard_events(EnterWindowMask);
  97         XFlush(dpy);
  98 }
  99
 100 void
 101 manage(Window w, XWindowAttributes *wa)
 102 {
 103         Client *c, **l;
 104         XSetWindowAttributes twa;
 105
 106         c = emallocz(sizeof(Client));
 107         c->win = w;
 108         c->tx = c->x = wa->x;
 109         c->ty = c->y = wa->y;
 110         c->tw = c->w = wa->width;
 111         c->h = wa->height;
 112         c->th = barrect.height;
 113         update_size(c);
 114         XSetWindowBorderWidth(dpy, c->win, 1);
 115         XSetWindowBorder(dpy, c->win, brush.border);
 116         XSelectInput(dpy, c->win, CLIENT_MASK);
 117         XGetTransientForHint(dpy, c->win, &c->trans);
 118         twa.override_redirect = 1;
 119         twa.background_pixmap = ParentRelative;
 120         twa.event_mask = ExposureMask;
 121
 122         c->title = XCreateWindow(dpy, root, c->tx, c->ty, c->tw, c->th,
 123                         0, DefaultDepth(dpy, screen), CopyFromParent,
 124                         DefaultVisual(dpy, screen),
 125                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &twa);
 126         update_name(c);
 127
 128         for(l=&clients; *l; l=&(*l)->next);
 129         c->next = *l; /* *l == nil */
 130         *l = c;
 131         c->snext = stack;
 132         stack = c;
 133         XMapWindow(dpy, c->win);
 134         XMapWindow(dpy, c->title);
 135         XGrabButton(dpy, Button1, Mod1Mask, c->win, False, ButtonPressMask,
 136                         GrabModeAsync, GrabModeSync, None, None);
 137         XGrabButton(dpy, Button2, Mod1Mask, c->win, False, ButtonPressMask,
 138                         GrabModeAsync, GrabModeSync, None, None);
 139         XGrabButton(dpy, Button3, Mod1Mask, c->win, False, ButtonPressMask,
 140                         GrabModeAsync, GrabModeSync, None, None);
 141         resize(c);
 142         focus(c);
 143 }
 144
 145 void
 146 resize(Client *c)
 147 {
 148         XConfigureEvent e;
 149
 150         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 151         e.type = ConfigureNotify;
 152         e.event = c->win;
 153         e.window = c->win;
 154         e.x = c->x;
 155         e.y = c->y;
 156         e.width = c->w;
 157         e.height = c->h;
 158         e.border_width = 0;
 159         e.above = None;
 160         e.override_redirect = False;
 161         XSelectInput(dpy, c->win, CLIENT_MASK & ~StructureNotifyMask);
 162         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&e);
 163         XSelectInput(dpy, c->win, CLIENT_MASK);
 164         XFlush(dpy);
 165 }
 166
 167 static int
 168 dummy_error_handler(Display *dpy, XErrorEvent *error)
 169 {
 170         return 0;
 171 }
 172
 173 void
 174 unmanage(Client *c)
 175 {
 176         Client **l;
 177
 178         XGrabServer(dpy);
 179         XSetErrorHandler(dummy_error_handler);
 180
 181         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 182         XDestroyWindow(dpy, c->title);
 183
 184         for(l=&clients; *l && *l != c; l=&(*l)->next);
 185         eassert(*l == c);
 186         *l = c->next;
 187         for(l=&stack; *l && *l != c; l=&(*l)->snext);
 188         eassert(*l == c);
 189         *l = c->snext;
 190         free(c);
 191
 192         XFlush(dpy);
 193         XSetErrorHandler(error_handler);
 194         XUngrabServer(dpy);
 195         if(stack)
 196                 focus(stack);
 197 }
 198
 199 Client *
 200 gettitle(Window w)
 201 {
 202         Client *c;
 203         for(c = clients; c; c = c->next)
 204                 if(c->title == w)
 205                         return c;
 206         return NULL;
 207 }
 208
 209 Client *
 210 getclient(Window w)
 211 {
 212         Client *c;
 213         for(c = clients; c; c = c->next)
 214                 if(c->win == w)
 215                         return c;
 216         return NULL;
 217 }
 218
 219 void
 220 draw_client(Client *c)
 221 {
 222         if(c == stack)
 223                 draw_bar();
 224
 225         c->tw = textwidth(&brush.font, c->name) + labelheight(&brush.font);
 226         c->tx = c->x + c->w - c->tw + 2;
 227         c->ty = c->y;
 228         XMoveResizeWindow(dpy, c->title, c->tx, c->ty, c->tw, c->th);
 229
 230         brush.rect.x = brush.rect.y = 0;
 231         brush.rect.width = c->tw;
 232         brush.rect.height = c->th;
 233
 234         draw(dpy, &brush, True, c->name);
 235         XCopyArea(dpy, brush.drawable, c->title, brush.gc,
 236                         0, 0, c->tw, c->th, 0, 0);
 237         XFlush(dpy);
 238 }