2 * screen.c - screen management
4 * Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 #include <xcb/xinerama.h>
26 #include <xcb/randr.h>
30 #include "objects/tag.h"
31 #include "objects/client.h"
32 #include "objects/drawin.h"
34 #include "common/xutil.h"
36 struct screen_output_t
38 /** The XRandR names of the output */
40 /** The size in millimeters */
41 uint32_t mm_width
, mm_height
;
44 ARRAY_FUNCS(screen_output_t
, screen_output
, DO_NOTHING
)
47 screen_xsitoarea(xcb_xinerama_screen_info_t si
)
60 screen_add(screen_t new_screen
)
62 foreach(screen_to_test
, globalconf
.screens
)
63 if(new_screen
.geometry
.x
== screen_to_test
->geometry
.x
64 && new_screen
.geometry
.y
== screen_to_test
->geometry
.y
)
66 /* we already have a screen for this area, just check if
67 * it's not bigger and drop it */
68 screen_to_test
->geometry
.width
=
69 MAX(new_screen
.geometry
.width
, screen_to_test
->geometry
.width
);
70 screen_to_test
->geometry
.height
=
71 MAX(new_screen
.geometry
.height
, screen_to_test
->geometry
.height
);
75 signal_add(&new_screen
.signals
, "property::workarea");
76 screen_array_append(&globalconf
.screens
, new_screen
);
78 /* Allocate the lua userdata object representing this screen */
79 screen_t
*s
= &globalconf
.screens
.tab
[globalconf
.screens
.len
-1];
80 screen_t
**ps
= lua_newuserdata(globalconf
.L
, sizeof(*ps
));
82 luaL_getmetatable(globalconf
.L
, "screen");
83 lua_setmetatable(globalconf
.L
, -2);
84 s
->userdata
= luaA_object_ref(globalconf
.L
, -1);
90 return globalconf
.screens
.len
> 0;
94 screen_scan_randr(void)
96 /* Check for extension before checking for XRandR */
97 if(xcb_get_extension_data(globalconf
.connection
, &xcb_randr_id
)->present
)
99 xcb_randr_query_version_reply_t
*version_reply
=
100 xcb_randr_query_version_reply(globalconf
.connection
,
101 xcb_randr_query_version(globalconf
.connection
, 1, 1), 0);
104 p_delete(&version_reply
);
106 /* A quick XRandR recall:
107 * You have CRTC that manages a part of a SCREEN.
108 * Each CRTC can draw stuff on one or more OUTPUT. */
109 xcb_randr_get_screen_resources_cookie_t screen_res_c
= xcb_randr_get_screen_resources(globalconf
.connection
, globalconf
.screen
->root
);
110 xcb_randr_get_screen_resources_reply_t
*screen_res_r
= xcb_randr_get_screen_resources_reply(globalconf
.connection
, screen_res_c
, NULL
);
112 /* Only use the data from XRandR if there is more than one screen
113 * defined. This should work around the broken nvidia driver. */
114 if (screen_res_r
->num_crtcs
<= 1)
116 p_delete(&screen_res_r
);
120 /* We go through CRTC, and build a screen for each one. */
121 xcb_randr_crtc_t
*randr_crtcs
= xcb_randr_get_screen_resources_crtcs(screen_res_r
);
123 for(int i
= 0; i
< screen_res_r
->num_crtcs
; i
++)
125 /* Get info on the output crtc */
126 xcb_randr_get_crtc_info_cookie_t crtc_info_c
= xcb_randr_get_crtc_info(globalconf
.connection
, randr_crtcs
[i
], XCB_CURRENT_TIME
);
127 xcb_randr_get_crtc_info_reply_t
*crtc_info_r
= xcb_randr_get_crtc_info_reply(globalconf
.connection
, crtc_info_c
, NULL
);
129 /* If CRTC has no OUTPUT, ignore it */
130 if(!xcb_randr_get_crtc_info_outputs_length(crtc_info_r
))
133 /* Prepare the new screen */
135 p_clear(&new_screen
, 1);
136 new_screen
.geometry
.x
= crtc_info_r
->x
;
137 new_screen
.geometry
.y
= crtc_info_r
->y
;
138 new_screen
.geometry
.width
= crtc_info_r
->width
;
139 new_screen
.geometry
.height
= crtc_info_r
->height
;
141 xcb_randr_output_t
*randr_outputs
= xcb_randr_get_crtc_info_outputs(crtc_info_r
);
143 for(int j
= 0; j
< xcb_randr_get_crtc_info_outputs_length(crtc_info_r
); j
++)
145 xcb_randr_get_output_info_cookie_t output_info_c
= xcb_randr_get_output_info(globalconf
.connection
, randr_outputs
[j
], XCB_CURRENT_TIME
);
146 xcb_randr_get_output_info_reply_t
*output_info_r
= xcb_randr_get_output_info_reply(globalconf
.connection
, output_info_c
, NULL
);
148 int len
= xcb_randr_get_output_info_name_length(output_info_r
);
149 /* name is not NULL terminated */
150 char *name
= memcpy(p_new(char *, len
+ 1), xcb_randr_get_output_info_name(output_info_r
), len
);
153 screen_output_array_append(&new_screen
.outputs
,
154 (screen_output_t
) { .name
= name
,
155 .mm_width
= output_info_r
->mm_width
,
156 .mm_height
= output_info_r
->mm_height
});
158 p_delete(&output_info_r
);
161 screen_add(new_screen
);
163 p_delete(&crtc_info_r
);
166 p_delete(&screen_res_r
);
168 return screens_exist();
176 screen_scan_xinerama(void)
178 bool xinerama_is_active
= false;
180 /* Check for extension before checking for Xinerama */
181 if(xcb_get_extension_data(globalconf
.connection
, &xcb_xinerama_id
)->present
)
183 xcb_xinerama_is_active_reply_t
*xia
;
184 xia
= xcb_xinerama_is_active_reply(globalconf
.connection
, xcb_xinerama_is_active(globalconf
.connection
), NULL
);
185 xinerama_is_active
= xia
->state
;
189 if(xinerama_is_active
)
191 xcb_xinerama_query_screens_reply_t
*xsq
;
192 xcb_xinerama_screen_info_t
*xsi
;
193 int xinerama_screen_number
;
195 xsq
= xcb_xinerama_query_screens_reply(globalconf
.connection
,
196 xcb_xinerama_query_screens_unchecked(globalconf
.connection
),
199 xsi
= xcb_xinerama_query_screens_screen_info(xsq
);
200 xinerama_screen_number
= xcb_xinerama_query_screens_screen_info_length(xsq
);
202 /* now check if screens overlaps (same x,y): if so, we take only the biggest one */
203 for(int screen
= 0; screen
< xinerama_screen_number
; screen
++)
207 s
.geometry
= screen_xsitoarea(xsi
[screen
]);
213 return screens_exist();
219 static void screen_scan_x11(void)
221 /* One screen only / Zaphod mode */
222 xcb_screen_t
*xcb_screen
= globalconf
.screen
;
227 s
.geometry
.width
= xcb_screen
->width_in_pixels
;
228 s
.geometry
.height
= xcb_screen
->height_in_pixels
;
232 /** Get screens informations and fill global configuration.
237 if(!screen_scan_randr() && !screen_scan_xinerama())
241 /** Return the Xinerama screen number where the coordinates belongs to.
242 * \param screen The logical screen number.
243 * \param x X coordinate
244 * \param y Y coordinate
245 * \return Screen pointer or screen param if no match or no multi-head.
248 screen_getbycoord(int x
, int y
)
250 foreach(s
, globalconf
.screens
)
251 if((x
< 0 || (x
>= s
->geometry
.x
&& x
< s
->geometry
.x
+ s
->geometry
.width
))
252 && (y
< 0 || (y
>= s
->geometry
.y
&& y
< s
->geometry
.y
+ s
->geometry
.height
)))
255 /* No screen found, let's be creative. */
256 return &globalconf
.screens
.tab
[0];
259 /** Get screens info.
260 * \param screen Screen.
261 * \param strut Honor windows strut.
262 * \return The screen area.
265 screen_area_get(screen_t
*screen
, bool strut
)
268 return screen
->geometry
;
270 area_t area
= screen
->geometry
;
271 uint16_t top
= 0, bottom
= 0, left
= 0, right
= 0;
273 #define COMPUTE_STRUT(o) \
275 if((o)->strut.top_start_x || (o)->strut.top_end_x || (o)->strut.top) \
278 top = MAX(top, (o)->strut.top); \
280 top = MAX(top, ((o)->geometry.y - area.y) + (o)->geometry.height); \
282 if((o)->strut.bottom_start_x || (o)->strut.bottom_end_x || (o)->strut.bottom) \
284 if((o)->strut.bottom) \
285 bottom = MAX(bottom, (o)->strut.bottom); \
287 bottom = MAX(bottom, (area.y + area.height) - (o)->geometry.y); \
289 if((o)->strut.left_start_y || (o)->strut.left_end_y || (o)->strut.left) \
291 if((o)->strut.left) \
292 left = MAX(left, (o)->strut.left); \
294 left = MAX(left, ((o)->geometry.x - area.x) + (o)->geometry.width); \
296 if((o)->strut.right_start_y || (o)->strut.right_end_y || (o)->strut.right) \
298 if((o)->strut.right) \
299 right = MAX(right, (o)->strut.right); \
301 right = MAX(right, (area.x + area.width) - (o)->geometry.x); \
305 foreach(c
, globalconf
.clients
)
306 if((*c
)->screen
== screen
&& client_isvisible(*c
))
309 foreach(drawin
, globalconf
.drawins
)
310 if((*drawin
)->visible
)
313 screen_getbycoord((*drawin
)->geometry
.x
, (*drawin
)->geometry
.y
);
314 if (d_screen
== screen
)
315 COMPUTE_STRUT(*drawin
)
322 area
.width
-= left
+ right
;
323 area
.height
-= top
+ bottom
;
328 /** Get display info.
329 * \return The display area.
332 display_area_get(void)
334 xcb_screen_t
*s
= globalconf
.screen
;
335 area_t area
= { .x
= 0,
337 .width
= s
->width_in_pixels
,
338 .height
= s
->height_in_pixels
};
342 /** Move a client to a virtual screen.
343 * \param c The client to move.
344 * \param new_screen The destination screen.
345 * \param doresize Set to true if we also move the client to the new x and
346 * y of the new screen.
349 screen_client_moveto(client_t
*c
, screen_t
*new_screen
, bool doresize
)
351 screen_t
*old_screen
= c
->screen
;
353 bool had_focus
= false;
355 if(new_screen
== c
->screen
)
358 if (globalconf
.focus
.client
== c
)
361 c
->screen
= new_screen
;
365 luaA_object_push(globalconf
.L
, c
);
366 luaA_object_emit_signal(globalconf
.L
, -1, "property::screen", 0);
367 lua_pop(globalconf
.L
, 1);
373 from
= screen_area_get(old_screen
, false);
374 to
= screen_area_get(c
->screen
, false);
376 area_t new_geometry
= c
->geometry
;
378 new_geometry
.x
= to
.x
+ new_geometry
.x
- from
.x
;
379 new_geometry
.y
= to
.y
+ new_geometry
.y
- from
.y
;
381 /* resize the client if it doesn't fit the new screen */
382 if(new_geometry
.width
> to
.width
)
383 new_geometry
.width
= to
.width
;
384 if(new_geometry
.height
> to
.height
)
385 new_geometry
.height
= to
.height
;
387 /* make sure the client is still on the screen */
388 if(new_geometry
.x
+ new_geometry
.width
> to
.x
+ to
.width
)
389 new_geometry
.x
= to
.x
+ to
.width
- new_geometry
.width
;
390 if(new_geometry
.y
+ new_geometry
.height
> to
.y
+ to
.height
)
391 new_geometry
.y
= to
.y
+ to
.height
- new_geometry
.height
;
393 /* move / resize the client */
394 client_resize(c
, new_geometry
, false);
395 luaA_object_push(globalconf
.L
, c
);
396 luaA_object_emit_signal(globalconf
.L
, -1, "property::screen", 0);
397 lua_pop(globalconf
.L
, 1);
402 /** Push a screen onto the stack.
403 * \param L The Lua VM state.
404 * \param s The screen to push.
405 * \return The number of elements pushed on stack.
408 luaA_pushscreen(lua_State
*L
, screen_t
*s
)
410 luaA_object_push(L
, s
->userdata
);
415 * \param L The Lua VM state.
416 * \return The number of elements pushed on stack.
418 * \lfield number The screen number, to get a screen.
421 luaA_screen_module_index(lua_State
*L
)
425 if((name
= lua_tostring(L
, 2)))
426 foreach(screen
, globalconf
.screens
)
427 foreach(output
, screen
->outputs
)
428 if(A_STREQ(output
->name
, name
))
429 return luaA_pushscreen(L
, screen
);
431 int screen
= luaL_checknumber(L
, 2) - 1;
432 luaA_checkscreen(screen
);
433 return luaA_pushscreen(L
, &globalconf
.screens
.tab
[screen
]);
437 * \param L The Lua VM state.
438 * \return The number of elements pushed on stack.
440 * \lfield coords The screen coordinates. Immutable.
441 * \lfield workarea The screen workarea.
444 luaA_screen_index(lua_State
*L
)
450 /* Get metatable of the screen. */
451 lua_getmetatable(L
, 1);
455 /* Do we have a field like that? */
456 if(!lua_isnil(L
, -1))
458 /* Yes, so return it! */
462 /* No, so remove everything. */
465 buf
= luaL_checkstring(L
, 2);
466 ps
= luaL_checkudata(L
, 1, "screen");
469 if(A_STREQ(buf
, "index"))
471 lua_pushinteger(L
, screen_array_indexof(&globalconf
.screens
, s
) + 1);
475 if(A_STREQ(buf
, "geometry"))
477 luaA_pusharea(L
, s
->geometry
);
481 if(A_STREQ(buf
, "workarea"))
483 luaA_pusharea(L
, screen_area_get(s
, true));
487 if(A_STREQ(buf
, "outputs"))
489 lua_createtable(L
, 0, s
->outputs
.len
);
490 foreach(output
, s
->outputs
)
492 lua_createtable(L
, 2, 0);
494 lua_pushinteger(L
, output
->mm_width
);
495 lua_setfield(L
, -2, "mm_width");
496 lua_pushinteger(L
, output
->mm_height
);
497 lua_setfield(L
, -2, "mm_height");
499 lua_setfield(L
, -2, output
->name
);
501 /* The table of tables we created. */
508 /** Add a signal to a screen.
509 * \param L The Lua VM state.
510 * \return The number of elements pushed on stack.
513 * \lparam A signal name.
516 luaA_screen_add_signal(lua_State
*L
)
518 screen_t
**ps
= luaL_checkudata(L
, 1, "screen");
520 const char *name
= luaL_checkstring(L
, 2);
521 signal_add(&s
->signals
, name
);
525 /** Connect a screen's signal.
526 * \param L The Lua VM state.
527 * \return The number of elements pushed on stack.
530 * \lparam A signal name.
531 * \lparam A function to call when the signal is emitted.
534 luaA_screen_connect_signal(lua_State
*L
)
536 screen_t
**ps
= luaL_checkudata(L
, 1, "screen");
538 const char *name
= luaL_checkstring(L
, 2);
539 luaA_checkfunction(L
, 3);
540 signal_connect(&s
->signals
, name
, luaA_object_ref(L
, 3));
544 /** Remove a signal to a screen.
545 * \param L The Lua VM state.
546 * \return The number of elements pushed on stack.
549 * \lparam A signal name.
550 * \lparam A function to remove
553 luaA_screen_disconnect_signal(lua_State
*L
)
555 screen_t
**ps
= luaL_checkudata(L
, 1, "screen");
557 const char *name
= luaL_checkstring(L
, 2);
558 luaA_checkfunction(L
, 3);
559 const void *ref
= lua_topointer(L
, 3);
560 signal_disconnect(&s
->signals
, name
, ref
);
561 luaA_object_unref(L
, (void *) ref
);
565 /** Emit a signal to a screen.
566 * \param L The Lua VM state.
567 * \param screen The screen.
568 * \param name The signal name.
569 * \param nargs The number of arguments to the signal function.
572 screen_emit_signal(lua_State
*L
, screen_t
*screen
, const char *name
, int nargs
)
574 luaA_pushscreen(L
, screen
);
575 lua_insert(L
, - nargs
- 1);
576 signal_object_emit(L
, &screen
->signals
, name
, nargs
+ 1);
579 /** Emit a signal to a screen.
580 * \param L The Lua VM state.
581 * \return The number of elements pushed on stack.
584 * \lparam A signal name.
585 * \lparam Various arguments, optional.
588 luaA_screen_emit_signal(lua_State
*L
)
590 screen_t
**ps
= luaL_checkudata(L
, 1, "screen");
591 screen_emit_signal(L
, *ps
, luaL_checkstring(L
, 2), lua_gettop(L
) - 2);
595 /** Get the screen count.
596 * \param L The Lua VM state.
597 * \return The number of elements pushed on stack.
600 * \lreturn The screen count, at least 1.
603 luaA_screen_count(lua_State
*L
)
605 lua_pushnumber(L
, globalconf
.screens
.len
);
609 const struct luaL_Reg awesome_screen_methods
[] =
611 { "count", luaA_screen_count
},
612 { "__index", luaA_screen_module_index
},
616 const struct luaL_Reg awesome_screen_meta
[] =
618 { "add_signal", luaA_screen_add_signal
},
619 { "connect_signal", luaA_screen_connect_signal
},
620 { "disconnect_signal", luaA_screen_disconnect_signal
},
621 { "emit_signal", luaA_screen_emit_signal
},
622 { "__index", luaA_screen_index
},
626 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80