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Focus events handlers 

- We are tracking focus, using FocusIn/FocusOut events handlers, so user
  should never be confused about which client has focus
- window_setfocus function generates focus change requests to the X server
- client_focus uses window_setfocus to set input focus
- revert_to when setting input focus set to Parent, compliant with
  ICCCM convention ([1])
- DEBUG flag for those who want to debug focus handlers

Most of the changes, are compliant with X11 handbook ([0]), but some
where obtained experimentally.

Kudos to Maarten Maathuis who helped a lot with this.

[0]
http://cgit.freedesktop.org/xorg/doc/xorg-docs/plain/hardcopy/X11/xlib.PS.gz

[1] http://tronche.com/gui/x/icccm/sec-4.html#s-4.2.7

Signed-off-by: Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Mariusz Ceier <mceier@gmail.com>
Signed-off-by: Julien Danjou <julien@danjou.info>
This commit is contained in:
Mariusz Ceier 2009-04-07 14:20:22 +02:00 committed by Julien Danjou
parent 4d6bf949a8
commit 904502552f
4 changed files with 122 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

143
client.c
View File

@ -185,36 +185,50 @@ client_getbywin(xcb_window_t w)
return c;
}
/** Call unfocus hook.
* \param c Client being unfocused
/** Sets focus on window - using xcb_set_input_focus or WM_TAKE_FOCUS
* \param w Window that should get focus
* \param set_input_focus Should we call xcb_set_input_focus
*/
static void
client_unfocus_hook(client_t *c)
window_setfocus(xcb_window_t w, bool set_input_focus)
{
bool takefocus = window_hasproto(w, WM_TAKE_FOCUS);
if(set_input_focus)
xcb_set_input_focus(globalconf.connection, XCB_INPUT_FOCUS_PARENT,
w, XCB_CURRENT_TIME);
if(takefocus)
window_takefocus(w);
}
/** Record that a client lost focus.
* \param c Client being unfocused
*/
void
client_unfocus_update(client_t *c)
{
globalconf.screens[c->phys_screen].client_focus = NULL;
ewmh_update_net_active_window(c->phys_screen);
/* Call hook */
if(globalconf.hooks.unfocus != LUA_REFNIL)
{
luaA_client_userdata_new(globalconf.L, c);
luaA_dofunction(globalconf.L, globalconf.hooks.unfocus, 1, 0);
}
}
/** Unfocus a client.
* \param c The client.
*/
static void
void
client_unfocus(client_t *c)
{
xcb_window_t root_win = xutil_screen_get(globalconf.connection, c->phys_screen)->root;
globalconf.screens[c->phys_screen].client_focus = NULL;
/* Set focus on root window, so no events leak to the current window. */
xcb_set_input_focus(globalconf.connection, XCB_INPUT_FOCUS_POINTER_ROOT,
root_win, XCB_CURRENT_TIME);
client_unfocus_hook(c);
ewmh_update_net_active_window(c->phys_screen);
window_setfocus(root_win, true);
}
/** Ban client and move it out of the viewport.
@ -239,19 +253,41 @@ client_ban(client_t *c)
/* All the wiboxes (may) need to be repositioned. */
if(client_hasstrut(c))
wibox_update_positions();
}
/* Wait until the last moment to take away the focus from the window. */
if(globalconf.screens[c->phys_screen].client_focus == c)
client_unfocus(c);
/* Wait until the last moment to take away the focus from the window. */
if(globalconf.screens[c->phys_screen].client_focus == c)
client_unfocus(c);
}
}
/** Call focus hook.
/** Record that a client got focus.
* \param c Client being focused.
*/
static void
client_focus_hook(client_t *c)
void
client_focus_update(client_t *c)
{
if(!client_maybevisible(c, c->screen))
return;
/* stop hiding client */
c->ishidden = false;
client_setminimized(c, false);
/* unban the client before focusing for consistency */
client_unban(c);
globalconf.screen_focus = &globalconf.screens[c->phys_screen];
globalconf.screen_focus->client_focus = c;
/* Some layouts use focused client differently, so call them back.
* And anyway, we have maybe unhidden */
client_need_arrange(c);
/* according to EWMH, we have to remove the urgent state from a client */
client_seturgent(c, false);
ewmh_update_net_active_window(c->phys_screen);
/* execute hook */
if(globalconf.hooks.focus != LUA_REFNIL)
{
@ -260,81 +296,24 @@ client_focus_hook(client_t *c)
}
}
/** Give focus to client, or to first client if client is NULL.
* \param c The client or NULL.
* \param sendmessage true, if we should send message.
*/
void
client_focus(client_t *c, bool sendmessage)
client_focus(client_t *c)
{
/* Handle c == NULL case */
if(!c)
{
if(sendmessage)
c = globalconf.clients;
if(!c)
return;
}
/* We have to set focus on first client */
if(!c && !(c = globalconf.clients))
return;
if(!client_maybevisible(c, c->screen))
return;
/* Does client window support WM_TAKE_FOCUS protocol ? */
bool takefocus = window_hasproto(c->win, WM_TAKE_FOCUS);
/* Disallow setting focus on client with No Input Model */
if(sendmessage && !takefocus && c->nofocus)
return;
/* Save current focused client */
client_t *focused_before = globalconf.screen_focus->client_focus;
if(c == focused_before)
return;
/* stop hiding c */
c->ishidden = false;
client_setminimized(c, false);
/* unban the client before focusing or it will fail */
client_unban(c);
globalconf.screen_focus = &globalconf.screens[c->phys_screen];
globalconf.screen_focus->client_focus = c;
if(sendmessage)
{
if(!c->nofocus)
/* Input models: Passive, Locally Active */
xcb_set_input_focus(globalconf.connection, XCB_INPUT_FOCUS_POINTER_ROOT,
c->win, XCB_CURRENT_TIME);
if(takefocus)
/* Input models: Local Active, Globally Active */
window_takefocus(c->win);
}
/* Some layouts use focused client differently, so call them back.
* And anyway, we have maybe unhidden */
client_need_arrange(c);
/* unfocus current selected client
* We don't really need to unfocus here,
* because client already received FocusOut event.
* What we need to do is call unfocus hook, to
* inform lua script, about this event.
*/
if(focused_before)
client_unfocus_hook(focused_before);
client_focus_hook(c);
/* according to EWMH, we have to remove the urgent state from a client */
client_seturgent(c, false);
ewmh_update_net_active_window(c->phys_screen);
window_setfocus(c->win, !c->nofocus);
}
/** Stack a window below.
@ -1548,7 +1527,7 @@ luaA_client_redraw(lua_State *L)
if(globalconf.screen_focus->client_focus == *c)
{
client_unfocus(*c);
client_focus(*c, true);
client_focus(*c);
}
return 0;
@ -2293,7 +2272,7 @@ luaA_client_module_newindex(lua_State *L)
{
case A_TK_FOCUS:
c = luaA_checkudata(L, 3, "client");
client_focus(*c, true);
client_focus(*c);
break;
default:
break;

5
client.h
View File

@ -75,7 +75,10 @@ void client_setmaxvert(client_t *, bool);
void client_setminimized(client_t *, bool);
void client_setborder(client_t *, int);
void client_seturgent(client_t *, bool);
void client_focus(client_t *, bool);
void client_focus(client_t *);
void client_focus_update(client_t *);
void client_unfocus(client_t *);
void client_unfocus_update(client_t *);
int luaA_client_newindex(lua_State *);

64
event.c
View File

@ -538,17 +538,64 @@ event_handle_focusin(void *data __attribute__ ((unused)),
xcb_connection_t *connection,
xcb_focus_in_event_t *ev)
{
/* filter focus-in events */
if (ev->detail != XCB_NOTIFY_DETAIL_NONLINEAR)
return 0;
client_t *c;
if((c = client_getbytitlebarwin(ev->event))
|| (c = client_getbywin(ev->event)))
client_focus(c, false);
/* Events that we are interested in: */
switch(ev->detail)
{
/* These are events that jump between windows of a toplevel client.
*
* NotifyVirtual event is handled in case where NotifyAncestor or
* NotifyInferior event is not generated on window that is managed by
* awesome ( client_* returns NULL )
*
* Can someone explain exactly why they are needed ?
*/
case XCB_NOTIFY_DETAIL_VIRTUAL:
case XCB_NOTIFY_DETAIL_ANCESTOR:
case XCB_NOTIFY_DETAIL_INFERIOR:
return 0;
/* These are events that jump between clients.
* Virtual events ensure we always get an event on our top-level window.
*/
case XCB_NOTIFY_DETAIL_NONLINEAR_VIRTUAL:
case XCB_NOTIFY_DETAIL_NONLINEAR:
if((c = client_getbytitlebarwin(ev->event))
|| (c = client_getbywin(ev->event)))
client_focus_update(c);
/* all other events are ignored */
default:
return 0;
}
}
/** The focus out event handler.
* \param data currently unused.
* \param connection The connection to the X server.
* \param ev The event.
*/
static int
event_handle_focusout(void *data __attribute__ ((unused)),
xcb_connection_t *connection,
xcb_focus_out_event_t *ev)
{
client_t *c;
/* Events that we are interested in: */
switch(ev->detail)
{
/* These are events that jump between clients.
* Virtual events ensure we always get an event on our top-level window.
*/
case XCB_NOTIFY_DETAIL_NONLINEAR_VIRTUAL:
case XCB_NOTIFY_DETAIL_NONLINEAR:
if((c = client_getbytitlebarwin(ev->event))
|| (c = client_getbywin(ev->event)))
client_unfocus_update(c);
/* all other events are ignored */
default:
return 0;
}
}
/** The expose event handler.
@ -868,6 +915,7 @@ void a_xcb_set_event_handlers(void)
xcb_event_set_enter_notify_handler(&globalconf.evenths, event_handle_enternotify, NULL);
xcb_event_set_leave_notify_handler(&globalconf.evenths, event_handle_leavenotify, NULL);
xcb_event_set_focus_in_handler(&globalconf.evenths, event_handle_focusin, NULL);
xcb_event_set_focus_out_handler(&globalconf.evenths, event_handle_focusout, NULL);
xcb_event_set_motion_notify_handler(&globalconf.evenths, event_handle_motionnotify, NULL);
xcb_event_set_expose_handler(&globalconf.evenths, event_handle_expose, NULL);
xcb_event_set_key_press_handler(&globalconf.evenths, event_handle_key, NULL);

2
ewmh.c
View File

@ -429,7 +429,7 @@ ewmh_process_client_message(xcb_client_message_event_t *ev)
else if(ev->type == _NET_ACTIVE_WINDOW)
{
if((c = client_getbywin(ev->window)))
client_focus(c, true);
client_focus(c);
}
return 0;