dwm/client.c

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/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
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* See LICENSE file for license details.
*/
#include "dwm.h"
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#include <stdlib.h>
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#include <string.h>
#include <X11/Xatom.h>
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#include <X11/Xutil.h>
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/* static */
static void
detachstack(Client *c) {
Client **tc;
for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
*tc = c->snext;
}
static void
grabbuttons(Client *c, Bool focused) {
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XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
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if(focused) {
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XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
}
else
XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
GrabModeAsync, GrabModeSync, None, None);
}
static void
setclientstate(Client *c, long state) {
long data[] = {state, None};
XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
PropModeReplace, (unsigned char *)data, 2);
}
static int
xerrordummy(Display *dsply, XErrorEvent *ee) {
return 0;
}
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/* extern */
void
configure(Client *c) {
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XConfigureEvent ce;
ce.type = ConfigureNotify;
ce.display = dpy;
ce.event = c->win;
ce.window = c->win;
ce.x = c->x;
ce.y = c->y;
ce.width = c->w;
ce.height = c->h;
ce.border_width = c->border;
ce.above = None;
ce.override_redirect = False;
XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
}
void
focus(Client *c) {
if(c && !isvisible(c))
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return;
if(sel && sel != c) {
grabbuttons(sel, False);
XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
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}
if(c) {
detachstack(c);
c->snext = stack;
stack = c;
grabbuttons(c, True);
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}
sel = c;
drawstatus();
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if(!selscreen)
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return;
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if(c) {
XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
}
else
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XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
}
Client *
getclient(Window w) {
Client *c;
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for(c = clients; c; c = c->next)
if(c->win == w)
return c;
return NULL;
}
Bool
isprotodel(Client *c) {
int i, n;
Atom *protocols;
Bool ret = False;
if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
for(i = 0; !ret && i < n; i++)
if(protocols[i] == wmatom[WMDelete])
ret = True;
XFree(protocols);
}
return ret;
}
void
killclient(Arg *arg) {
if(!sel)
return;
if(isprotodel(sel))
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sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
else
XKillClient(dpy, sel->win);
}
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void
manage(Window w, XWindowAttributes *wa) {
Client *c;
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Window trans;
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c = emallocz(sizeof(Client));
c->tags = emallocz(ntags * sizeof(Bool));
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c->win = w;
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c->x = wa->x;
c->y = wa->y;
c->w = wa->width;
c->h = wa->height;
if(c->w == sw && c->h == sh) {
c->border = 0;
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c->x = sx;
c->y = sy;
}
else {
c->border = BORDERPX;
if(c->x + c->w + 2 * c->border > wax + waw)
c->x = wax + waw - c->w - 2 * c->border;
if(c->y + c->h + 2 * c->border > way + wah)
c->y = way + wah - c->h - 2 * c->border;
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if(c->x < wax)
c->x = wax;
if(c->y < way)
c->y = way;
}
updatesizehints(c);
XSelectInput(dpy, c->win,
StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
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XGetTransientForHint(dpy, c->win, &trans);
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grabbuttons(c, False);
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XSetWindowBorder(dpy, c->win, dc.norm[ColBorder]);
updatetitle(c);
settags(c, getclient(trans));
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if(!c->isfloat)
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c->isfloat = trans || c->isfixed;
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if(clients)
clients->prev = c;
c->next = clients;
c->snext = stack;
stack = clients = c;
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XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
XMapWindow(dpy, c->win);
setclientstate(c, NormalState);
if(isvisible(c))
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focus(c);
arrange();
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}
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void
resize(Client *c, Bool sizehints) {
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float actual, dx, dy, max, min;
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XWindowChanges wc;
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if(c->w <= 0 || c->h <= 0)
return;
if(sizehints) {
if(c->minw && c->w < c->minw)
c->w = c->minw;
if(c->minh && c->h < c->minh)
c->h = c->minh;
if(c->maxw && c->w > c->maxw)
c->w = c->maxw;
if(c->maxh && c->h > c->maxh)
c->h = c->maxh;
/* inspired by algorithm from fluxbox */
if(c->minay > 0 && c->maxay && (c->h - c->baseh) > 0) {
dx = (float)(c->w - c->basew);
dy = (float)(c->h - c->baseh);
min = (float)(c->minax) / (float)(c->minay);
max = (float)(c->maxax) / (float)(c->maxay);
actual = dx / dy;
if(max > 0 && min > 0 && actual > 0) {
if(actual < min) {
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dy = (dx * min + dy) / (min * min + 1);
dx = dy * min;
c->w = (int)dx + c->basew;
c->h = (int)dy + c->baseh;
}
else if(actual > max) {
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dy = (dx * min + dy) / (max * max + 1);
dx = dy * min;
c->w = (int)dx + c->basew;
c->h = (int)dy + c->baseh;
}
}
}
if(c->incw)
c->w -= (c->w - c->basew) % c->incw;
if(c->inch)
c->h -= (c->h - c->baseh) % c->inch;
}
if(c->w == sw && c->h == sh)
c->border = 0;
else
c->border = BORDERPX;
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/* offscreen appearance fixes */
if(c->x > sw)
c->x = sw - c->w - 2 * c->border;
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if(c->y > sh)
c->y = sh - c->h - 2 * c->border;
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if(c->x + c->w + 2 * c->border < sx)
c->x = sx;
if(c->y + c->h + 2 * c->border < sy)
c->y = sy;
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wc.x = c->x;
wc.y = c->y;
wc.width = c->w;
wc.height = c->h;
wc.border_width = c->border;
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XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
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configure(c);
XSync(dpy, False);
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}
void
updatesizehints(Client *c) {
long msize;
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XSizeHints size;
if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
size.flags = PSize;
c->flags = size.flags;
if(c->flags & PBaseSize) {
c->basew = size.base_width;
c->baseh = size.base_height;
}
else
c->basew = c->baseh = 0;
if(c->flags & PResizeInc) {
c->incw = size.width_inc;
c->inch = size.height_inc;
}
else
c->incw = c->inch = 0;
if(c->flags & PMaxSize) {
c->maxw = size.max_width;
c->maxh = size.max_height;
}
else
c->maxw = c->maxh = 0;
if(c->flags & PMinSize) {
c->minw = size.min_width;
c->minh = size.min_height;
}
else
c->minw = c->minh = 0;
if(c->flags & PAspect) {
c->minax = size.min_aspect.x;
c->minay = size.min_aspect.y;
c->maxax = size.max_aspect.x;
c->maxay = size.max_aspect.y;
}
else
c->minax = c->minay = c->maxax = c->maxay = 0;
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c->isfixed = (c->maxw && c->minw && c->maxh && c->minh &&
c->maxw == c->minw && c->maxh == c->minh);
}
void
updatetitle(Client *c) {
char **list = NULL;
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int n;
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XTextProperty name;
name.nitems = 0;
c->name[0] = 0;
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XGetTextProperty(dpy, c->win, &name, netatom[NetWMName]);
if(!name.nitems)
XGetWMName(dpy, c->win, &name);
if(!name.nitems)
return;
if(name.encoding == XA_STRING)
strncpy(c->name, (char *)name.value, sizeof c->name);
else {
if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
&& n > 0 && *list)
{
strncpy(c->name, *list, sizeof c->name);
XFreeStringList(list);
}
}
XFree(name.value);
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}
void
unmanage(Client *c) {
Client *nc;
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/* The server grab construct avoids race conditions. */
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XGrabServer(dpy);
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XSetErrorHandler(xerrordummy);
detach(c);
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detachstack(c);
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if(sel == c) {
for(nc = stack; nc && !isvisible(nc); nc = nc->snext);
focus(nc);
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}
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XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
setclientstate(c, WithdrawnState);
free(c->tags);
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free(c);
XSync(dpy, False);
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XSetErrorHandler(xerror);
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XUngrabServer(dpy);
arrange();
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}