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awesome/screen.c

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/*
* screen.c - screen management
*
* Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <stdio.h>
#include <xcb/xcb.h>
#include <xcb/xinerama.h>
#include <xcb/randr.h>
#include "screen.h"
#include "ewmh.h"
#include "objects/tag.h"
#include "objects/client.h"
#include "objects/wibox.h"
#include "luaa.h"
#include "common/xutil.h"
struct screen_output_t
{
/** The XRandR names of the output */
char *name;
/** The size in millimeters */
uint32_t mm_width, mm_height;
};
ARRAY_FUNCS(screen_output_t, screen_output, DO_NOTHING)
static inline area_t
screen_xsitoarea(xcb_xinerama_screen_info_t si)
{
area_t a =
{
.x = si.x_org,
.y = si.y_org,
.width = si.width,
.height = si.height
};
return a;
}
static void
screen_add(screen_t new_screen)
{
signal_add(&new_screen.signals, "property::workarea");
signal_add(&new_screen.signals, "tag::attach");
signal_add(&new_screen.signals, "tag::detach");
screen_array_append(&globalconf.screens, new_screen);
}
static bool
screen_scan_randr(void)
{
/* Check for extension before checking for XRandR */
if(xcb_get_extension_data(globalconf.connection, &xcb_randr_id)->present)
{
xcb_randr_query_version_reply_t *version_reply =
xcb_randr_query_version_reply(globalconf.connection,
xcb_randr_query_version(globalconf.connection, 1, 1), 0);
if(version_reply)
{
p_delete(&version_reply);
/* A quick XRandR recall:
* You have CRTC that manages a part of a SCREEN.
* Each CRTC can draw stuff on one or more OUTPUT. */
xcb_randr_get_screen_resources_cookie_t screen_res_c = xcb_randr_get_screen_resources(globalconf.connection, globalconf.screen->root);
xcb_randr_get_screen_resources_reply_t *screen_res_r = xcb_randr_get_screen_resources_reply(globalconf.connection, screen_res_c, NULL);
/* Only use the data from XRandR if there is more than one screen
* defined. This should work around the broken nvidia driver. */
if (screen_res_r->num_crtcs <= 1)
{
p_delete(&screen_res_r);
return false;
}
/* We go through CRTC, and build a screen for each one. */
xcb_randr_crtc_t *randr_crtcs = xcb_randr_get_screen_resources_crtcs(screen_res_r);
for(int i = 0; i < screen_res_r->num_crtcs; i++)
{
/* Get info on the output crtc */
xcb_randr_get_crtc_info_cookie_t crtc_info_c = xcb_randr_get_crtc_info(globalconf.connection, randr_crtcs[i], XCB_CURRENT_TIME);
xcb_randr_get_crtc_info_reply_t *crtc_info_r = xcb_randr_get_crtc_info_reply(globalconf.connection, crtc_info_c, NULL);
/* If CRTC has no OUTPUT, ignore it */
if(!xcb_randr_get_crtc_info_outputs_length(crtc_info_r))
continue;
/* Prepare the new screen */
screen_t new_screen;
p_clear(&new_screen, 1);
new_screen.geometry.x = crtc_info_r->x;
new_screen.geometry.y = crtc_info_r->y;
new_screen.geometry.width= crtc_info_r->width;
new_screen.geometry.height= crtc_info_r->height;
xcb_randr_output_t *randr_outputs = xcb_randr_get_crtc_info_outputs(crtc_info_r);
for(int j = 0; j < xcb_randr_get_crtc_info_outputs_length(crtc_info_r); j++)
{
xcb_randr_get_output_info_cookie_t output_info_c = xcb_randr_get_output_info(globalconf.connection, randr_outputs[j], XCB_CURRENT_TIME);
xcb_randr_get_output_info_reply_t *output_info_r = xcb_randr_get_output_info_reply(globalconf.connection, output_info_c, NULL);
int len = xcb_randr_get_output_info_name_length(output_info_r);
/* name is not NULL terminated */
char *name = memcpy(p_new(char *, len + 1), xcb_randr_get_output_info_name(output_info_r), len);
name[len] = '\0';
screen_output_array_append(&new_screen.outputs,
(screen_output_t) { .name = name,
.mm_width = output_info_r->mm_width,
.mm_height = output_info_r->mm_height });
p_delete(&output_info_r);
}
screen_add(new_screen);
p_delete(&crtc_info_r);
}
p_delete(&screen_res_r);
return true;
}
}
return false;
}
static bool
screen_scan_xinerama(void)
{
bool xinerama_is_active = false;
/* Check for extension before checking for Xinerama */
if(xcb_get_extension_data(globalconf.connection, &xcb_xinerama_id)->present)
{
xcb_xinerama_is_active_reply_t *xia;
xia = xcb_xinerama_is_active_reply(globalconf.connection, xcb_xinerama_is_active(globalconf.connection), NULL);
xinerama_is_active = xia->state;
p_delete(&xia);
}
if(xinerama_is_active)
{
xcb_xinerama_query_screens_reply_t *xsq;
xcb_xinerama_screen_info_t *xsi;
int xinerama_screen_number;
xsq = xcb_xinerama_query_screens_reply(globalconf.connection,
xcb_xinerama_query_screens_unchecked(globalconf.connection),
NULL);
xsi = xcb_xinerama_query_screens_screen_info(xsq);
xinerama_screen_number = xcb_xinerama_query_screens_screen_info_length(xsq);
/* now check if screens overlaps (same x,y): if so, we take only the biggest one */
for(int screen = 0; screen < xinerama_screen_number; screen++)
{
bool drop = false;
foreach(screen_to_test, globalconf.screens)
if(xsi[screen].x_org == screen_to_test->geometry.x
&& xsi[screen].y_org == screen_to_test->geometry.y)
{
/* we already have a screen for this area, just check if
* it's not bigger and drop it */
drop = true;
int i = screen_array_indexof(&globalconf.screens, screen_to_test);
screen_to_test->geometry.width =
MAX(xsi[screen].width, xsi[i].width);
screen_to_test->geometry.height =
MAX(xsi[screen].height, xsi[i].height);
}
if(!drop)
{
screen_t s;
p_clear(&s, 1);
s.geometry = screen_xsitoarea(xsi[screen]);
screen_add(s);
}
}
p_delete(&xsq);
return true;
}
return false;
}
static void screen_scan_x11(void)
{
/* One screen only / Zaphod mode */
xcb_screen_t *xcb_screen = globalconf.screen;
screen_t s;
p_clear(&s, 1);
s.geometry.x = 0;
s.geometry.y = 0;
s.geometry.width = xcb_screen->width_in_pixels;
s.geometry.height = xcb_screen->height_in_pixels;
screen_add(s);
}
/** Get screens informations and fill global configuration.
*/
void
screen_scan(void)
{
if(!screen_scan_randr() && !screen_scan_xinerama())
screen_scan_x11();
}
/** Return the Xinerama screen number where the coordinates belongs to.
* \param screen The logical screen number.
* \param x X coordinate
* \param y Y coordinate
* \return Screen pointer or screen param if no match or no multi-head.
*/
screen_t *
screen_getbycoord(int x, int y)
{
foreach(s, globalconf.screens)
if((x < 0 || (x >= s->geometry.x && x < s->geometry.x + s->geometry.width))
&& (y < 0 || (y >= s->geometry.y && y < s->geometry.y + s->geometry.height)))
return s;
/* No screen found, let's be creative. */
return &globalconf.screens.tab[0];
}
/** Get screens info.
* \param screen Screen.
* \param strut Honor windows strut.
* \return The screen area.
*/
area_t
screen_area_get(screen_t *screen, bool strut)
{
if(!strut)
return screen->geometry;
area_t area = screen->geometry;
uint16_t top = 0, bottom = 0, left = 0, right = 0;
#define COMPUTE_STRUT(o) \
{ \
if((o)->strut.top_start_x || (o)->strut.top_end_x || (o)->strut.top) \
{ \
if((o)->strut.top) \
top = MAX(top, (o)->strut.top); \
else \
top = MAX(top, ((o)->geometry.y - area.y) + (o)->geometry.height); \
} \
if((o)->strut.bottom_start_x || (o)->strut.bottom_end_x || (o)->strut.bottom) \
{ \
if((o)->strut.bottom) \
bottom = MAX(bottom, (o)->strut.bottom); \
else \
bottom = MAX(bottom, (area.y + area.height) - (o)->geometry.y); \
} \
if((o)->strut.left_start_y || (o)->strut.left_end_y || (o)->strut.left) \
{ \
if((o)->strut.left) \
left = MAX(left, (o)->strut.left); \
else \
left = MAX(left, ((o)->geometry.x - area.x) + (o)->geometry.width); \
} \
if((o)->strut.right_start_y || (o)->strut.right_end_y || (o)->strut.right) \
{ \
if((o)->strut.right) \
right = MAX(right, (o)->strut.right); \
else \
right = MAX(right, (area.x + area.width) - (o)->geometry.x); \
} \
}
foreach(c, globalconf.clients)
if(client_isvisible(*c, screen))
COMPUTE_STRUT(*c)
foreach(wibox, globalconf.wiboxes)
if((*wibox)->visible
&& (*wibox)->screen == screen)
COMPUTE_STRUT(*wibox)
#undef COMPUTE_STRUT
area.x += left;
area.y += top;
area.width -= left + right;
area.height -= top + bottom;
return area;
}
/** Get display info.
* \return The display area.
*/
area_t
display_area_get(void)
{
xcb_screen_t *s = globalconf.screen;
area_t area = { .x = 0,
.y = 0,
.width = s->width_in_pixels,
.height = s->height_in_pixels };
return area;
}
/** Move a client to a virtual screen.
* \param c The client to move.
* \param new_screen The destination screen.
* \param doresize Set to true if we also move the client to the new x and
* y of the new screen.
*/
void
screen_client_moveto(client_t *c, screen_t *new_screen, bool doresize)
{
screen_t *old_screen = c->screen;
area_t from, to;
if(new_screen == c->screen)
return;
c->screen = new_screen;
/* If client was on a screen, remove old tags */
if(old_screen)
foreach(old_tag, old_screen->tags)
untag_client(c, *old_tag);
if(!doresize)
{
luaA_object_push(globalconf.L, c);
luaA_object_emit_signal(globalconf.L, -1, "property::screen", 0);
lua_pop(globalconf.L, 1);
return;
}
from = screen_area_get(old_screen, false);
to = screen_area_get(c->screen, false);
area_t new_geometry = c->geometry;
new_geometry.x = to.x + new_geometry.x - from.x;
new_geometry.y = to.y + new_geometry.y - from.y;
/* resize the client if it doesn't fit the new screen */
if(new_geometry.width > to.width)
new_geometry.width = to.width;
if(new_geometry.height > to.height)
new_geometry.height = to.height;
/* make sure the client is still on the screen */
if(new_geometry.x + new_geometry.width > to.x + to.width)
new_geometry.x = to.x + to.width - new_geometry.width;
if(new_geometry.y + new_geometry.height > to.y + to.height)
new_geometry.y = to.y + to.height - new_geometry.height;
/* move / resize the client */
client_resize(c, new_geometry, false);
luaA_object_push(globalconf.L, c);
luaA_object_emit_signal(globalconf.L, -1, "property::screen", 0);
lua_pop(globalconf.L, 1);
}
/** Push a screen onto the stack.
* \param L The Lua VM state.
* \param s The screen to push.
* \return The number of elements pushed on stack.
*/
static int
luaA_pushscreen(lua_State *L, screen_t *s)
{
lua_pushlightuserdata(L, s);
luaL_getmetatable(L, "screen");
lua_setmetatable(L, -2);
return 1;
}
/** Screen module.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lfield number The screen number, to get a screen.
*/
static int
luaA_screen_module_index(lua_State *L)
{
const char *name;
if((name = lua_tostring(L, 2)))
foreach(screen, globalconf.screens)
foreach(output, screen->outputs)
if(!a_strcmp(output->name, name))
return luaA_pushscreen(L, screen);
int screen = luaL_checknumber(L, 2) - 1;
luaA_checkscreen(screen);
return luaA_pushscreen(L, &globalconf.screens.tab[screen]);
}
/** Get screen tags.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam None or a table of tags to set to the screen.
* The table must contains at least one tag.
* \return A table with all screen tags.
*/
static int
luaA_screen_tags(lua_State *L)
{
screen_t *s = luaL_checkudata(L, 1, "screen");
if(lua_gettop(L) == 2)
{
luaA_checktable(L, 2);
/* Detach all tags, but go backward since the array len will change */
for(int i = s->tags.len - 1; i >= 0; i--)
tag_remove_from_screen(s->tags.tab[i]);
lua_pushnil(L);
while(lua_next(L, 2))
tag_append_to_screen(L, -1, s);
}
else
{
lua_createtable(L, s->tags.len, 0);
for(int i = 0; i < s->tags.len; i++)
{
luaA_object_push(L, s->tags.tab[i]);
lua_rawseti(L, -2, i + 1);
}
}
return 1;
}
/** A screen.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lfield coords The screen coordinates. Immutable.
* \lfield workarea The screen workarea.
*/
static int
luaA_screen_index(lua_State *L)
{
const char *buf;
screen_t *s;
/* Get metatable of the screen. */
lua_getmetatable(L, 1);
/* Get the field */
lua_pushvalue(L, 2);
lua_rawget(L, -2);
/* Do we have a field like that? */
if(!lua_isnil(L, -1))
{
/* Yes, so return it! */
lua_remove(L, -2);
return 1;
}
/* No, so remove everything. */
lua_pop(L, 2);
buf = luaL_checkstring(L, 2);
s = lua_touserdata(L, 1);
if(a_strcmp(buf, "index") == 0)
lua_pushinteger(L, screen_array_indexof(&globalconf.screens, s) + 1);
else if(a_strcmp(buf, "geometry") == 0)
luaA_pusharea(L, s->geometry);
else if(a_strcmp(buf, "workarea") == 0)
luaA_pusharea(L, screen_area_get(s, true));
else if(a_strcmp(buf, "outputs") == 0)
{
lua_createtable(L, 0, s->outputs.len);
foreach(output, s->outputs)
{
lua_createtable(L, 2, 0);
lua_pushinteger(L, output->mm_width);
lua_setfield(L, -2, "mm_width");
lua_pushinteger(L, output->mm_height);
lua_setfield(L, -2, "mm_height");
lua_setfield(L, -2, output->name);
}
}
else
return 0;
return 1;
}
/** Add a signal to a screen.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lvalue A screen.
* \lparam A signal name.
*/
static int
luaA_screen_add_signal(lua_State *L)
{
screen_t *s = lua_touserdata(L, 1);
const char *name = luaL_checkstring(L, 2);
signal_add(&s->signals, name);
return 0;
}
/** Connect a screen's signal.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lvalue A screen.
* \lparam A signal name.
* \lparam A function to call when the signal is emitted.
*/
static int
luaA_screen_connect_signal(lua_State *L)
{
screen_t *s = lua_touserdata(L, 1);
const char *name = luaL_checkstring(L, 2);
luaA_checkfunction(L, 3);
signal_connect(&s->signals, name, luaA_object_ref(L, 3));
return 0;
}
/** Remove a signal to a screen.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lvalue A screen.
* \lparam A signal name.
* \lparam A function to remove
*/
static int
luaA_screen_disconnect_signal(lua_State *L)
{
screen_t *s = lua_touserdata(L, 1);
const char *name = luaL_checkstring(L, 2);
luaA_checkfunction(L, 3);
const void *ref = lua_topointer(L, 3);
signal_disconnect(&s->signals, name, ref);
luaA_object_unref(L, (void *) ref);
return 0;
}
/** Emit a signal to a screen.
* \param L The Lua VM state.
* \param screen The screen.
* \param name The signal name.
* \param nargs The number of arguments to the signal function.
*/
void
screen_emit_signal(lua_State *L, screen_t *screen, const char *name, int nargs)
{
luaA_pushscreen(L, screen);
lua_insert(L, - nargs - 1);
signal_object_emit(L, &screen->signals, name, nargs + 1);
}
/** Emit a signal to a screen.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lvalue A screen.
* \lparam A signal name.
* \lparam Various arguments, optional.
*/
static int
luaA_screen_emit_signal(lua_State *L)
{
screen_emit_signal(L, lua_touserdata(L, 1), luaL_checkstring(L, 2), lua_gettop(L) - 2);
return 0;
}
/** Get the screen count.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*
* \luastack
* \lreturn The screen count, at least 1.
*/
static int
luaA_screen_count(lua_State *L)
{
lua_pushnumber(L, globalconf.screens.len);
return 1;
}
const struct luaL_reg awesome_screen_methods[] =
{
{ "count", luaA_screen_count },
{ "__index", luaA_screen_module_index },
{ NULL, NULL }
};
const struct luaL_reg awesome_screen_meta[] =
{
{ "add_signal", luaA_screen_add_signal },
{ "connect_signal", luaA_screen_connect_signal },
{ "disconnect_signal", luaA_screen_disconnect_signal },
{ "emit_signal", luaA_screen_emit_signal },
{ "tags", luaA_screen_tags },
{ "__index", luaA_screen_index },
{ NULL, NULL }
};
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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