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awesome/screen.c

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/*
* screen.c - screen management
*
* Copyright © 2007-2008 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 "screen.h"
#include "ewmh.h"
#include "tag.h"
#include "client.h"
#include "widget.h"
#include "wibox.h"
extern awesome_t globalconf;
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;
}
/** Get screens informations and fill global configuration.
*/
void
screen_scan(void)
{
/* 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);
globalconf.xinerama_is_active = xia->state;
p_delete(&xia);
}
if(globalconf.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);
globalconf.screens = p_new(screen_t, xinerama_screen_number);
/* 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;
for(int screen_to_test = 0; screen_to_test < globalconf.nscreen; screen_to_test++)
if(xsi[screen].x_org == globalconf.screens[screen_to_test].geometry.x
&& xsi[screen].y_org == globalconf.screens[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;
globalconf.screens[screen_to_test].geometry.width =
MAX(xsi[screen].width, xsi[screen_to_test].width);
globalconf.screens[screen_to_test].geometry.height =
MAX(xsi[screen].height, xsi[screen_to_test].height);
}
if(!drop)
{
globalconf.screens[globalconf.nscreen].index = screen;
globalconf.screens[globalconf.nscreen++].geometry = screen_xsitoarea(xsi[screen]);
}
}
/* realloc smaller if xinerama_screen_number != screen registered */
if(xinerama_screen_number != globalconf.nscreen)
{
screen_t *new = p_new(screen_t, globalconf.nscreen);
memcpy(new, globalconf.screens, globalconf.nscreen * sizeof(screen_t));
p_delete(&globalconf.screens);
globalconf.screens = new;
}
p_delete(&xsq);
}
else
{
globalconf.nscreen = xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
globalconf.screens = p_new(screen_t, globalconf.nscreen);
for(int screen = 0; screen < globalconf.nscreen; screen++)
{
xcb_screen_t *s = xutil_screen_get(globalconf.connection, screen);
globalconf.screens[screen].index = screen;
globalconf.screens[screen].geometry.x = 0;
globalconf.screens[screen].geometry.y = 0;
globalconf.screens[screen].geometry.width = s->width_in_pixels;
globalconf.screens[screen].geometry.height = s->height_in_pixels;
}
}
globalconf.screen_focus = globalconf.screens;
}
/** 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 number or screen param if no match or no multi-head.
*/
int
screen_getbycoord(int screen, int x, int y)
{
int i;
/* don't waste our time */
if(!globalconf.xinerama_is_active)
return screen;
for(i = 0; i < globalconf.nscreen; i++)
{
screen_t *s = &globalconf.screens[i];
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 i;
}
return screen;
}
/** Get screens info.
* \param screen Screen number.
* \param wiboxes Wiboxes list to remove.
* \param padding Padding.
* \param strut Honor windows strut.
* \return The screen area.
*/
area_t
screen_area_get(int screen, wibox_array_t *wiboxes,
padding_t *padding, bool strut)
{
area_t area = globalconf.screens[screen].geometry;
uint16_t top = 0, bottom = 0, left = 0, right = 0;
/* make padding corrections */
if(padding)
{
area.x += padding->left;
area.y += padding->top;
area.width -= padding->left + padding->right;
area.height -= padding->top + padding->bottom;
}
/* struts are additive, to allow for multiple clients at the screen edge. */
if(strut)
{
client_t *c;
for(c = globalconf.clients; c; c = c->next)
if(client_isvisible(c, screen))
{
if(c->strut.top_start_x || c->strut.top_end_x)
{
if(c->strut.top)
top += c->strut.top;
else
top += c->geometry.height;
}
if(c->strut.bottom_start_x || c->strut.bottom_end_x)
{
if(c->strut.bottom)
bottom += c->strut.bottom;
else
bottom += c->geometry.height;
}
if(c->strut.left_start_y || c->strut.left_end_y)
{
if(c->strut.left)
left += c->strut.left;
else
left += c->geometry.width;
}
if(c->strut.right_start_y || c->strut.right_end_y)
{
if(c->strut.right)
right += c->strut.right;
else
right += c->geometry.width;
}
}
}
/* swindow geometry includes borders. */
if(wiboxes)
for(int i = 0; i < wiboxes->len; i++)
{
wibox_t *w = wiboxes->tab[i];
if(w->isvisible)
switch(w->position)
{
case Top:
top += w->sw.geometry.height;
break;
case Bottom:
bottom += w->sw.geometry.height;
break;
case Left:
left += w->sw.geometry.width;
break;
case Right:
right += w->sw.geometry.width;
break;
default:
break;
}
}
area.x += left;
area.y += top;
area.width -= left + right;
area.height -= top + bottom;
return area;
}
/** Get display info.
* \param phys_screen Physical screen number.
* \param wiboxes The wiboxes.
* \param padding Padding.
* \return The display area.
*/
area_t
display_area_get(int phys_screen, wibox_array_t *wiboxes, padding_t *padding)
{
xcb_screen_t *s = xutil_screen_get(globalconf.connection, phys_screen);
area_t area = { .x = 0,
.y = 0,
.width = s->width_in_pixels,
.height = s->height_in_pixels };
if(wiboxes)
for(int i = 0; i < wiboxes->len; i++)
{
wibox_t *w = wiboxes->tab[i];
area.y += w->position == Top ? w->sw.geometry.height : 0;
area.height -= (w->position == Top || w->position == Bottom) ? w->sw.geometry.height : 0;
}
/* make padding corrections */
if(padding)
{
area.x += padding->left;
area.y += padding->top;
area.width -= padding->left + padding->right;
area.height -= padding->top + padding->bottom;
}
return area;
}
/** This returns the real X screen number for a logical
* screen if Xinerama is active.
* \param screen The logical screen.
* \return The X screen.
*/
int
screen_virttophys(int screen)
{
if(globalconf.xinerama_is_active)
return globalconf.default_screen;
return screen;
}
/** Move a client to a virtual screen.
* \param c The client to move.
* \param new_screen The destinatiuon screen number.
* \param dotag Set to true if we also change tags.
* \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, int new_screen, bool dotag, bool doresize)
{
int i, old_screen = c->screen;
tag_array_t *old_tags = &globalconf.screens[old_screen].tags,
*new_tags = &globalconf.screens[new_screen].tags;
area_t from, to;
bool wasvisible = client_isvisible(c, c->screen);
if(new_screen == c->screen)
return;
c->screen = new_screen;
if(c->titlebar)
c->titlebar->screen = new_screen;
if(dotag && !c->issticky)
{
/* remove old tags */
for(i = 0; i < old_tags->len; i++)
untag_client(c, old_tags->tab[i]);
/* add new tags */
for(i = 0; i < new_tags->len; i++)
if(new_tags->tab[i]->selected)
tag_client(c, new_tags->tab[i]);
}
if(wasvisible)
globalconf.screens[old_screen].need_arrange = true;
client_need_arrange(c);
if(!doresize)
return;
from = screen_area_get(old_screen, NULL, NULL, false);
to = screen_area_get(c->screen, NULL, NULL, false);
area_t new_geometry = c->geometry;
if(c->isfullscreen)
{
new_geometry = to;
area_t new_f_geometry = c->geometries.fullscreen;
new_f_geometry.x = to.x + new_f_geometry.x - from.x;
new_f_geometry.y = to.y + new_f_geometry.y - from.x;
/* resize the client's original geometry if it doesn't fit the screen */
if(new_f_geometry.width > to.width)
new_f_geometry.width = to.width;
if(new_f_geometry.height > to.height)
new_f_geometry.height = to.height;
/* make sure the client is still on the screen */
if(new_f_geometry.x + new_f_geometry.width > to.x + to.width)
new_f_geometry.x = to.x + to.width - new_f_geometry.width;
if(new_f_geometry.y + new_f_geometry.height > to.y + to.height)
new_f_geometry.y = to.y + to.height - new_f_geometry.height;
c->geometries.fullscreen = new_f_geometry;
}
else
{
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);
}
/** 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)
{
int screen = luaL_checknumber(L, 2) - 1;
luaA_checkscreen(screen);
lua_pushlightuserdata(L, &globalconf.screens[screen]);
return luaA_settype(L, "screen");
}
/** Get or set 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)
{
int i;
screen_t *s = lua_touserdata(L, 1);
if(!s)
luaL_typerror(L, 1, "screen");
if(lua_gettop(L) == 2)
{
tag_t **tag;
luaA_checktable(L, 2);
/* remove current tags */
for(i = 0; i < s->tags.len; i++)
s->tags.tab[i]->screen = SCREEN_UNDEF;
tag_array_wipe(&s->tags);
tag_array_init(&s->tags);
s->need_arrange = true;
/* push new tags */
lua_pushnil(L);
while(lua_next(L, 2))
{
tag = luaA_checkudata(L, -1, "tag");
tag_append_to_screen(*tag, s);
lua_pop(L, 1);
}
/* check there's at least one tag! */
if(!s->tags.len)
{
luaA_warn(L, "screen %d has no tag, taking last resort action and adding default tag\n",
s->index);
tag_append_to_screen(tag_new("default", sizeof("default") - 1), s);
return 1;
}
}
else
{
lua_newtable(L);
for(i = 0; i < s->tags.len; i++)
{
luaA_tag_userdata_new(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, i.e. without wiboxes.
*/
static int
luaA_screen_index(lua_State *L)
{
size_t len;
const char *buf;
screen_t *s;
if(luaA_usemetatable(L, 1, 2))
return 1;
buf = luaL_checklstring(L, 2, &len);
s = lua_touserdata(L, 1);
switch(a_tokenize(buf, len))
{
case A_TK_GEOMETRY:
luaA_pusharea(L, s->geometry);
break;
case A_TK_WORKAREA:
luaA_pusharea(L, screen_area_get(s->index, &s->wiboxes, &s->padding, true));
break;
default:
return 0;
}
return 1;
}
/** Set or get the screen padding.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam None or a table with new padding values.
* \lreturn The screen padding. A table with top, right, left and bottom
* keys and values in pixel.
*/
static int
luaA_screen_padding(lua_State *L)
{
screen_t *s = lua_touserdata(L, 1);
if(!s)
luaL_typerror(L, 1, "screen");
if(lua_gettop(L) == 2)
{
s->padding = luaA_getopt_padding(L, 2, &s->padding);
s->need_arrange = true;
/* All the wiboxes repositioned */
for(int i = 0; i < s->wiboxes.len; i++)
wibox_position_update(s->wiboxes.tab[i]);
ewmh_update_workarea(screen_virttophys(s->index));
}
return luaA_pushpadding(L, &s->padding);
}
/** 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.nscreen);
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[] =
{
{ "tags", luaA_screen_tags },
{ "padding", luaA_screen_padding },
{ "__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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