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events.c
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events.c
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/* evilwm - Minimalist Window Manager for X
* Copyright (C) 1999-2011 Ciaran Anscomb <[email protected]>
* see README for license and other details. */
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/select.h>
#include "evilwm.h"
#include "log.h"
static int interruptibleXNextEvent(XEvent *event);
#ifdef DEBUG
const char *debug_atom_name(Atom a);
const char *debug_atom_name(Atom a) {
static char buf[48];
char *atom_name = XGetAtomName(dpy, a);
strncpy(buf, atom_name, sizeof(buf));
buf[sizeof(buf)-1] = 0;
return buf;
}
#endif
static void handle_key_event(XKeyEvent *e) {
KeySym key = XKeycodeToKeysym(dpy,e->keycode,0);
Client *c;
int width_inc, height_inc;
ScreenInfo *current_screen = find_current_screen();
switch(key) {
case KEY_NEW:
spawn((const char *const *)opt_term);
break;
case KEY_NEXT:
next();
if (XGrabKeyboard(dpy, e->root, False, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess) {
XEvent ev;
do {
XMaskEvent(dpy, KeyPressMask|KeyReleaseMask, &ev);
if (ev.type == KeyPress && XKeycodeToKeysym(dpy,ev.xkey.keycode,0) == KEY_NEXT)
next();
} while (ev.type == KeyPress || XKeycodeToKeysym(dpy,ev.xkey.keycode,0) == KEY_NEXT);
XUngrabKeyboard(dpy, CurrentTime);
}
ewmh_select_client(current);
break;
case KEY_DOCK_TOGGLE:
set_docks_visible(current_screen, !current_screen->docks_visible);
break;
#ifdef VWM
case XK_1: case XK_2: case XK_3: case XK_4:
case XK_5: case XK_6: case XK_7: case XK_8:
switch_vdesk(current_screen, KEY_TO_VDESK(key));
break;
case KEY_PREVDESK:
if (current_screen->vdesk > 0) {
switch_vdesk(current_screen,
current_screen->vdesk - 1);
}
break;
case KEY_NEXTDESK:
if (current_screen->vdesk < VDESK_MAX) {
switch_vdesk(current_screen,
current_screen->vdesk + 1);
}
break;
case KEY_TOGGLEDESK:
switch_vdesk(current_screen, current_screen->old_vdesk);
break;
#endif
default: break;
}
c = current;
if (c == NULL) return;
width_inc = (c->width_inc > 1) ? c->width_inc : 16;
height_inc = (c->height_inc > 1) ? c->height_inc : 16;
switch (key) {
case KEY_LEFT:
if (e->state & altmask) {
if ((c->width - width_inc) >= c->min_width)
c->width -= width_inc;
} else {
c->x -= 16;
}
goto move_client;
case KEY_DOWN:
if (e->state & altmask) {
if (!c->max_height || (c->height + height_inc) <= c->max_height)
c->height += height_inc;
} else {
c->y += 16;
}
goto move_client;
case KEY_UP:
if (e->state & altmask) {
if ((c->height - height_inc) >= c->min_height)
c->height -= height_inc;
} else {
c->y -= 16;
}
goto move_client;
case KEY_RIGHT:
if (e->state & altmask) {
if (!c->max_width || (c->width + width_inc) <= c->max_width)
c->width += width_inc;
} else {
c->x += 16;
}
goto move_client;
case KEY_TOPLEFT:
c->x = c->border;
c->y = c->border;
goto move_client;
case KEY_TOPRIGHT:
c->x = DisplayWidth(dpy, c->screen->screen)
- c->width-c->border;
c->y = c->border;
goto move_client;
case KEY_BOTTOMLEFT:
c->x = c->border;
c->y = DisplayHeight(dpy, c->screen->screen)
- c->height-c->border;
goto move_client;
case KEY_BOTTOMRIGHT:
c->x = DisplayWidth(dpy, c->screen->screen)
- c->width-c->border;
c->y = DisplayHeight(dpy, c->screen->screen)
- c->height-c->border;
goto move_client;
case KEY_KILL:
send_wm_delete(c, e->state & altmask);
break;
case KEY_LOWER: case KEY_ALTLOWER:
client_lower(c);
break;
case KEY_INFO:
show_info(c, e->keycode);
break;
case KEY_MAX:
maximise_client(c, NET_WM_STATE_TOGGLE, MAXIMISE_HORZ|MAXIMISE_VERT);
break;
case KEY_MAXVERT:
maximise_client(c, NET_WM_STATE_TOGGLE, MAXIMISE_VERT);
break;
#ifdef VWM
case KEY_FIX:
if (is_fixed(c)) {
client_to_vdesk(c, current_screen->vdesk);
} else {
client_to_vdesk(c, VDESK_FIXED);
}
break;
#endif
default: break;
}
return;
move_client:
if (abs(c->x) == c->border && c->oldw != 0)
c->x = 0;
if (abs(c->y) == c->border && c->oldh != 0)
c->y = 0;
moveresize(c);
#ifdef WARP_POINTER
setmouse(c->window, c->width + c->border - 1,
c->height + c->border - 1);
#endif
discard_enter_events(c);
return;
}
#ifdef MOUSE
static void handle_button_event(XButtonEvent *e) {
Client *c = find_client(e->window);
if (c) {
switch (e->button) {
case Button1:
drag(c); break;
case Button2:
sweep(c); break;
case Button3:
client_lower(c); break;
default: break;
}
}
}
#endif
static void do_window_changes(int value_mask, XWindowChanges *wc, Client *c,
int gravity) {
if (gravity == 0)
gravity = c->win_gravity_hint;
c->win_gravity = gravity;
if (value_mask & CWX) c->x = wc->x;
if (value_mask & CWY) c->y = wc->y;
if (value_mask & (CWWidth|CWHeight)) {
int dw = 0, dh = 0;
if (!(value_mask & (CWX|CWY))) {
gravitate_border(c, -c->border);
}
if (value_mask & CWWidth) {
int neww = wc->width;
if (neww < c->min_width)
neww = c->min_width;
if (c->max_width && neww > c->max_width)
neww = c->max_width;
dw = neww - c->width;
c->width = neww;
}
if (value_mask & CWHeight) {
int newh = wc->height;
if (newh < c->min_height)
newh = c->min_height;
if (c->max_height && newh > c->max_height)
newh = c->max_height;
dh = newh - c->height;
c->height = newh;
}
/* only apply position fixes if not being explicitly moved */
if (!(value_mask & (CWX|CWY))) {
switch (gravity) {
default:
case NorthWestGravity:
break;
case NorthGravity:
c->x -= (dw / 2);
break;
case NorthEastGravity:
c->x -= dw;
break;
case WestGravity:
c->y -= (dh / 2);
break;
case CenterGravity:
c->x -= (dw / 2);
c->y -= (dh / 2);
break;
case EastGravity:
c->x -= dw;
c->y -= (dh / 2);
break;
case SouthWestGravity:
c->y -= dh;
break;
case SouthGravity:
c->x -= (dw / 2);
c->y -= dh;
break;
case SouthEastGravity:
c->x -= dw;
c->y -= dh;
break;
}
value_mask |= CWX|CWY;
gravitate_border(c, c->border);
}
}
wc->x = c->x - c->border;
wc->y = c->y - c->border;
wc->border_width = c->border;
XConfigureWindow(dpy, c->parent, value_mask, wc);
XMoveResizeWindow(dpy, c->window, 0, 0, c->width, c->height);
if ((value_mask & (CWX|CWY)) && !(value_mask & (CWWidth|CWHeight))) {
send_config(c);
}
}
static void handle_configure_request(XConfigureRequestEvent *e) {
Client *c = find_client(e->window);
XWindowChanges wc;
wc.x = e->x;
wc.y = e->y;
wc.width = e->width;
wc.height = e->height;
wc.border_width = 0;
wc.sibling = e->above;
wc.stack_mode = e->detail;
if (c) {
if (e->value_mask & CWStackMode && e->value_mask & CWSibling) {
Client *sibling = find_client(e->above);
if (sibling) {
wc.sibling = sibling->parent;
}
}
do_window_changes(e->value_mask, &wc, c, 0);
if (c == current) {
discard_enter_events(c);
}
} else {
LOG_XENTER("XConfigureWindow(window=%lx, value_mask=%lx)", (unsigned int)e->window, e->value_mask);
XConfigureWindow(dpy, e->window, e->value_mask, &wc);
LOG_XLEAVE();
}
}
static void handle_map_request(XMapRequestEvent *e) {
Client *c = find_client(e->window);
LOG_ENTER("handle_map_request(window=%lx)", e->window);
if (c) {
#ifdef VWM
if (!is_fixed(c) && c->vdesk != c->screen->vdesk)
switch_vdesk(c->screen, c->vdesk);
#endif
client_show(c);
client_raise(c);
} else {
XWindowAttributes attr;
XGetWindowAttributes(dpy, e->window, &attr);
make_new_client(e->window, find_screen(attr.root));
}
LOG_LEAVE();
}
static void handle_unmap_event(XUnmapEvent *e) {
Client *c = find_client(e->window);
LOG_ENTER("handle_unmap_event(window=%lx)", e->window);
if (c) {
if (c->ignore_unmap) {
c->ignore_unmap--;
LOG_DEBUG("ignored (%d ignores remaining)\n", c->ignore_unmap);
} else {
LOG_DEBUG("flagging client for removal\n");
c->remove = 1;
need_client_tidy = 1;
}
} else {
LOG_DEBUG("unknown client!\n");
}
LOG_LEAVE();
}
static void handle_colormap_change(XColormapEvent *e) {
Client *c = find_client(e->window);
if (c && e->new) {
c->cmap = e->colormap;
XInstallColormap(dpy, c->cmap);
}
}
static void handle_property_change(XPropertyEvent *e) {
Client *c = find_client(e->window);
if (c) {
LOG_ENTER("handle_property_change(window=%lx, atom=%s)", e->window, debug_atom_name(e->atom));
if (e->atom == XA_WM_NORMAL_HINTS) {
get_wm_normal_hints(c);
LOG_DEBUG("geometry=%dx%d+%d+%d\n", c->width, c->height, c->x, c->y);
} else if (e->atom == xa_net_wm_window_type) {
get_window_type(c);
if (!c->is_dock
#ifdef VWM
&& (is_fixed(c) || (c->vdesk == c->screen->vdesk))
#endif
) {
client_show(c);
}
}
LOG_LEAVE();
}
}
static void handle_enter_event(XCrossingEvent *e) {
Client *c;
if ((c = find_client(e->window))) {
#ifdef VWM
if (!is_fixed(c) && c->vdesk != c->screen->vdesk)
return;
#endif
select_client(c);
ewmh_select_client(c);
}
}
static void handle_mappingnotify_event(XMappingEvent *e) {
XRefreshKeyboardMapping(e);
if (e->request == MappingKeyboard) {
int i;
for (i = 0; i < num_screens; i++) {
grab_keys_for_screen(&screens[i]);
}
}
}
#ifdef SHAPE
static void handle_shape_event(XShapeEvent *e) {
Client *c = find_client(e->window);
if (c)
set_shape(c);
}
#endif
static void handle_client_message(XClientMessageEvent *e) {
#ifdef VWM
ScreenInfo *s = find_current_screen();
#endif
Client *c;
LOG_ENTER("handle_client_message(window=%lx, format=%d, type=%s)", e->window, e->format, debug_atom_name(e->message_type));
#ifdef VWM
if (e->message_type == xa_net_current_desktop) {
switch_vdesk(s, e->data.l[0]);
LOG_LEAVE();
return;
}
#endif
c = find_client(e->window);
if (!c && e->message_type == xa_net_request_frame_extents) {
ewmh_set_net_frame_extents(e->window);
LOG_LEAVE();
return;
}
if (!c) {
LOG_LEAVE();
return;
}
if (e->message_type == xa_net_active_window) {
/* Only do this if it came from direct user action */
if (e->data.l[0] == 2) {
#ifdef VWM
if (c->screen == s)
#endif
select_client(c);
}
LOG_LEAVE();
return;
}
if (e->message_type == xa_net_close_window) {
/* Only do this if it came from direct user action */
if (e->data.l[1] == 2) {
send_wm_delete(c, 0);
}
LOG_LEAVE();
return;
}
if (e->message_type == xa_net_moveresize_window) {
/* Only do this if it came from direct user action */
int source_indication = (e->data.l[0] >> 12) & 3;
if (source_indication == 2) {
int value_mask = (e->data.l[0] >> 8) & 0x0f;
int gravity = e->data.l[0] & 0xff;
XWindowChanges wc;
wc.x = e->data.l[1];
wc.y = e->data.l[2];
wc.width = e->data.l[3];
wc.height = e->data.l[4];
do_window_changes(value_mask, &wc, c, gravity);
}
LOG_LEAVE();
return;
}
if (e->message_type == xa_net_restack_window) {
/* Only do this if it came from direct user action */
if (e->data.l[0] == 2) {
XWindowChanges wc;
wc.sibling = e->data.l[1];
wc.stack_mode = e->data.l[2];
do_window_changes(CWSibling | CWStackMode, &wc, c, c->win_gravity);
}
LOG_LEAVE();
return;
}
#ifdef VWM
if (e->message_type == xa_net_wm_desktop) {
/* Only do this if it came from direct user action */
if (e->data.l[1] == 2) {
client_to_vdesk(c, e->data.l[0]);
}
LOG_LEAVE();
return;
}
#endif
if (e->message_type == xa_net_wm_state) {
int i, maximise_hv = 0;
/* Message can contain up to two state changes: */
for (i = 1; i <= 2; i++) {
if ((Atom)e->data.l[i] == xa_net_wm_state_maximized_vert) {
maximise_hv |= MAXIMISE_VERT;
} else if ((Atom)e->data.l[i] == xa_net_wm_state_maximized_horz) {
maximise_hv |= MAXIMISE_HORZ;
} else if ((Atom)e->data.l[i] == xa_net_wm_state_fullscreen) {
maximise_hv |= MAXIMISE_VERT|MAXIMISE_HORZ;
}
}
if (maximise_hv) {
maximise_client(c, e->data.l[0], maximise_hv);
}
LOG_LEAVE();
return;
}
LOG_LEAVE();
}
void event_main_loop(void) {
union {
XEvent xevent;
#ifdef SHAPE
XShapeEvent xshape;
#endif
} ev;
/* main event loop here */
while (!wm_exit) {
if (interruptibleXNextEvent(&ev.xevent)) {
switch (ev.xevent.type) {
case KeyPress:
handle_key_event(&ev.xevent.xkey); break;
#ifdef MOUSE
case ButtonPress:
handle_button_event(&ev.xevent.xbutton); break;
#endif
case ConfigureRequest:
handle_configure_request(&ev.xevent.xconfigurerequest); break;
case MapRequest:
handle_map_request(&ev.xevent.xmaprequest); break;
case ColormapNotify:
handle_colormap_change(&ev.xevent.xcolormap); break;
case EnterNotify:
handle_enter_event(&ev.xevent.xcrossing); break;
case PropertyNotify:
handle_property_change(&ev.xevent.xproperty); break;
case UnmapNotify:
handle_unmap_event(&ev.xevent.xunmap); break;
case MappingNotify:
handle_mappingnotify_event(&ev.xevent.xmapping); break;
case ClientMessage:
handle_client_message(&ev.xevent.xclient); break;
default:
#ifdef SHAPE
if (have_shape && ev.xevent.type == shape_event) {
handle_shape_event(&ev.xshape);
}
#endif
#ifdef RANDR
if (have_randr && ev.xevent.type == randr_event_base + RRScreenChangeNotify) {
XRRUpdateConfiguration(&ev.xevent);
}
#endif
break;
}
}
if (need_client_tidy) {
struct list *iter, *niter;
need_client_tidy = 0;
for (iter = clients_tab_order; iter; iter = niter) {
Client *c = iter->data;
niter = iter->next;
if (c->remove)
remove_client(c);
}
}
}
}
/* interruptibleXNextEvent() is taken from the Blender source and comes with
* the following copyright notice: */
/* Copyright (c) Mark J. Kilgard, 1994, 1995, 1996. */
/* This program is freely distributable without licensing fees
* and is provided without guarantee or warrantee expressed or
* implied. This program is -not- in the public domain. */
/* Unlike XNextEvent, if a signal arrives, interruptibleXNextEvent will
* return zero. */
static int interruptibleXNextEvent(XEvent *event) {
fd_set fds;
int rc;
int dpy_fd = ConnectionNumber(dpy);
for (;;) {
if (XPending(dpy)) {
XNextEvent(dpy, event);
return 1;
}
FD_ZERO(&fds);
FD_SET(dpy_fd, &fds);
rc = select(dpy_fd + 1, &fds, NULL, NULL, NULL);
if (rc < 0) {
if (errno == EINTR) {
return 0;
} else {
LOG_ERROR("interruptibleXNextEvent(): select()\n");
}
}
}
}