726 lines
22 KiB
C
726 lines
22 KiB
C
/*
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* screen.c - screen management
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*
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* Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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/** awesome screen API
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*
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* Furthermore to the classes described here, one can also use signals as
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* described in @{signals}.
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*
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* @author Julien Danjou <julien@danjou.info>
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* @copyright 2008-2009 Julien Danjou
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* @release @AWESOME_VERSION@
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* @classmod screen
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*/
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#include "objects/screen.h"
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#include "banning.h"
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#include "objects/client.h"
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#include "objects/drawin.h"
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#include <stdio.h>
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#include <xcb/xcb.h>
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#include <xcb/xinerama.h>
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#include <xcb/randr.h>
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/** Screen is a table where indexes are screen numbers. You can use `screen[1]`
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* to get access to the first screen, etc. Alternatively, if RANDR information
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* is available, you can use output names for finding screen objects.
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* The primary screen can be accessed as `screen.primary`.
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* Each screen has a set of properties.
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*
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* @tfield table geometry The screen coordinates. Immutable.
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* @tfield table workarea The screen workarea.
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* @tfield int index The screen number.
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* @tfield table outputs If RANDR information is available, a list of outputs
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* for this screen and their size in mm.
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* @table screen
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*/
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struct screen_output_t
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{
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/** The XRandR names of the output */
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char *name;
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/** The size in millimeters */
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uint32_t mm_width, mm_height;
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/** The XID */
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xcb_randr_output_t output;
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};
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static void
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screen_output_wipe(screen_output_t *output)
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{
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p_delete(&output->name);
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}
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ARRAY_FUNCS(screen_output_t, screen_output, screen_output_wipe)
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static lua_class_t screen_class;
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LUA_OBJECT_FUNCS(screen_class, screen_t, screen)
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/** Collect a screen. */
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static void
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screen_wipe(screen_t *s)
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{
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screen_output_array_wipe(&s->outputs);
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}
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void
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luaA_pushscreen(lua_State *L, screen_t *s)
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{
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lua_pushinteger(L, screen_get_index(s));
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}
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/** Get a screen argument from the lua stack */
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screen_t *
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luaA_checkscreen(lua_State *L, int sidx)
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{
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if (lua_isnumber(L, sidx))
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{
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int screen = lua_tointeger(L, sidx);
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if(screen < 1 || screen > globalconf.screens.len)
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luaL_error(L, "invalid screen number: %d", screen);
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return globalconf.screens.tab[screen - 1];
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} else
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return luaA_checkudata(L, sidx, &screen_class);
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}
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static inline area_t
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screen_xsitoarea(xcb_xinerama_screen_info_t si)
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{
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area_t a =
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{
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.x = si.x_org,
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.y = si.y_org,
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.width = si.width,
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.height = si.height
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};
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return a;
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}
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static void
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screen_add(lua_State *L, int sidx)
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{
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screen_t *new_screen = luaA_checkudata(L, sidx, &screen_class);
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foreach(screen_to_test, globalconf.screens)
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if(new_screen->geometry.x == (*screen_to_test)->geometry.x
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&& new_screen->geometry.y == (*screen_to_test)->geometry.y)
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{
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/* we already have a screen for this area, just check if
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* it's not bigger and drop it */
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(*screen_to_test)->geometry.width =
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MAX(new_screen->geometry.width, (*screen_to_test)->geometry.width);
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(*screen_to_test)->geometry.height =
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MAX(new_screen->geometry.height, (*screen_to_test)->geometry.height);
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lua_remove(L, sidx);
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return;
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}
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luaA_object_ref(L, sidx);
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screen_array_append(&globalconf.screens, new_screen);
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}
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static bool
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screens_exist(void)
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{
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return globalconf.screens.len > 0;
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}
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static bool
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screen_scan_randr(void)
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{
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/* Check for extension before checking for XRandR */
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if(xcb_get_extension_data(globalconf.connection, &xcb_randr_id)->present)
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{
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xcb_randr_query_version_reply_t *version_reply =
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xcb_randr_query_version_reply(globalconf.connection,
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xcb_randr_query_version(globalconf.connection, 1, 3), 0);
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if(version_reply)
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{
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uint32_t major_version = version_reply->major_version;
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uint32_t minor_version = version_reply->minor_version;
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p_delete(&version_reply);
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/* Do we agree on a supported version? */
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if (major_version != 1 || minor_version < 2)
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return false;
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globalconf.have_randr_13 = minor_version >= 3;
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/* A quick XRandR recall:
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* You have CRTC that manages a part of a SCREEN.
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* Each CRTC can draw stuff on one or more OUTPUT. */
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xcb_randr_get_screen_resources_cookie_t screen_res_c = xcb_randr_get_screen_resources(globalconf.connection, globalconf.screen->root);
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xcb_randr_get_screen_resources_reply_t *screen_res_r = xcb_randr_get_screen_resources_reply(globalconf.connection, screen_res_c, NULL);
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/* Only use the data from XRandR if there is more than one screen
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* defined. This should work around the broken nvidia driver. */
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if (screen_res_r->num_crtcs <= 1)
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{
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p_delete(&screen_res_r);
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return false;
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}
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/* We go through CRTC, and build a screen for each one. */
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xcb_randr_crtc_t *randr_crtcs = xcb_randr_get_screen_resources_crtcs(screen_res_r);
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for(int i = 0; i < screen_res_r->num_crtcs; i++)
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{
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lua_State *L = globalconf_get_lua_State();
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/* Get info on the output crtc */
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xcb_randr_get_crtc_info_cookie_t crtc_info_c = xcb_randr_get_crtc_info(globalconf.connection, randr_crtcs[i], XCB_CURRENT_TIME);
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xcb_randr_get_crtc_info_reply_t *crtc_info_r = xcb_randr_get_crtc_info_reply(globalconf.connection, crtc_info_c, NULL);
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/* If CRTC has no OUTPUT, ignore it */
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if(!xcb_randr_get_crtc_info_outputs_length(crtc_info_r))
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continue;
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/* Prepare the new screen */
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screen_t *new_screen = screen_new(L);
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new_screen->geometry.x = crtc_info_r->x;
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new_screen->geometry.y = crtc_info_r->y;
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new_screen->geometry.width= crtc_info_r->width;
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new_screen->geometry.height= crtc_info_r->height;
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xcb_randr_output_t *randr_outputs = xcb_randr_get_crtc_info_outputs(crtc_info_r);
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for(int j = 0; j < xcb_randr_get_crtc_info_outputs_length(crtc_info_r); j++)
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{
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xcb_randr_get_output_info_cookie_t output_info_c = xcb_randr_get_output_info(globalconf.connection, randr_outputs[j], XCB_CURRENT_TIME);
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xcb_randr_get_output_info_reply_t *output_info_r = xcb_randr_get_output_info_reply(globalconf.connection, output_info_c, NULL);
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int len = xcb_randr_get_output_info_name_length(output_info_r);
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/* name is not NULL terminated */
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char *name = memcpy(p_new(char *, len + 1), xcb_randr_get_output_info_name(output_info_r), len);
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name[len] = '\0';
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screen_output_array_append(&new_screen->outputs,
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(screen_output_t) { .name = name,
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.mm_width = output_info_r->mm_width,
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.mm_height = output_info_r->mm_height,
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.output = randr_outputs[j] });
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p_delete(&output_info_r);
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}
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screen_add(L, -1);
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p_delete(&crtc_info_r);
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}
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p_delete(&screen_res_r);
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screen_update_primary();
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return screens_exist();
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}
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}
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return false;
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}
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static bool
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screen_scan_xinerama(void)
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{
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bool xinerama_is_active = false;
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/* Check for extension before checking for Xinerama */
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if(xcb_get_extension_data(globalconf.connection, &xcb_xinerama_id)->present)
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{
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xcb_xinerama_is_active_reply_t *xia;
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xia = xcb_xinerama_is_active_reply(globalconf.connection, xcb_xinerama_is_active(globalconf.connection), NULL);
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xinerama_is_active = xia->state;
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p_delete(&xia);
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}
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if(xinerama_is_active)
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{
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xcb_xinerama_query_screens_reply_t *xsq;
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xcb_xinerama_screen_info_t *xsi;
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int xinerama_screen_number;
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xsq = xcb_xinerama_query_screens_reply(globalconf.connection,
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xcb_xinerama_query_screens_unchecked(globalconf.connection),
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NULL);
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xsi = xcb_xinerama_query_screens_screen_info(xsq);
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xinerama_screen_number = xcb_xinerama_query_screens_screen_info_length(xsq);
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/* now check if screens overlaps (same x,y): if so, we take only the biggest one */
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for(int screen = 0; screen < xinerama_screen_number; screen++)
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{
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lua_State *L = globalconf_get_lua_State();
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screen_t *s = screen_new(L);
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s->geometry = screen_xsitoarea(xsi[screen]);
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screen_add(L, -1);
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}
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p_delete(&xsq);
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return screens_exist();
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}
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return false;
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}
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static void screen_scan_x11(void)
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{
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lua_State *L = globalconf_get_lua_State();
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xcb_screen_t *xcb_screen = globalconf.screen;
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screen_t *s = screen_new(L);
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s->geometry.x = 0;
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s->geometry.y = 0;
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s->geometry.width = xcb_screen->width_in_pixels;
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s->geometry.height = xcb_screen->height_in_pixels;
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screen_add(L, -1);
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}
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/** Get screens informations and fill global configuration.
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*/
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void
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screen_scan(void)
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{
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if(!screen_scan_randr() && !screen_scan_xinerama())
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screen_scan_x11();
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}
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/** Return the squared distance of the given screen to the coordinates.
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* \param screen The screen
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* \param x X coordinate
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* \param y Y coordinate
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* \return Squared distance of the point to the screen.
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*/
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static unsigned int
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screen_get_distance_squared(screen_t *s, int x, int y)
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{
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int sx = s->geometry.x, sy = s->geometry.y;
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int sheight = s->geometry.height, swidth = s->geometry.width;
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unsigned int dist_x, dist_y;
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/* Calculate distance in X coordinate */
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if (x < sx)
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dist_x = sx - x;
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else if (x < sx + swidth)
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dist_x = 0;
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else
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dist_x = x - sx - swidth;
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/* Calculate distance in Y coordinate */
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if (y < sy)
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dist_y = sy - y;
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else if (y < sy + sheight)
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dist_y = 0;
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else
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dist_y = y - sy - sheight;
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return dist_x * dist_x + dist_y * dist_y;
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}
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/** Return the first screen number where the coordinates belong to.
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* \param x X coordinate
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* \param y Y coordinate
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* \return Screen pointer or screen param if no match or no multi-head.
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*/
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screen_t *
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screen_getbycoord(int x, int y)
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{
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foreach(s, globalconf.screens)
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if(screen_coord_in_screen(*s, x, y))
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return *s;
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/* No screen found, find nearest screen. */
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screen_t *nearest_screen = globalconf.screens.tab[0];
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unsigned int nearest_dist = UINT_MAX;
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foreach(s, globalconf.screens)
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{
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unsigned int dist_sq = screen_get_distance_squared(*s, x, y);
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if(dist_sq < nearest_dist)
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{
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nearest_dist = dist_sq;
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nearest_screen = *s;
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}
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}
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return nearest_screen;
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}
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/** Are the given coordinates in a given screen?
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* \param screen The logical screen number.
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* \param x X coordinate
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* \param y Y coordinate
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* \return True if the X/Y coordinates are in the given screen.
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*/
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bool
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screen_coord_in_screen(screen_t *s, int x, int y)
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{
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return (x >= s->geometry.x && x < s->geometry.x + s->geometry.width)
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&& (y >= s->geometry.y && y < s->geometry.y + s->geometry.height);
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}
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/** Get screens info.
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* \param screen Screen.
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* \param strut Honor windows strut.
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* \return The screen area.
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*/
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static area_t
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screen_area_get(screen_t *screen, bool strut)
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{
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if(!strut)
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return screen->geometry;
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area_t area = screen->geometry;
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uint16_t top = 0, bottom = 0, left = 0, right = 0;
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#define COMPUTE_STRUT(o) \
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{ \
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if((o)->strut.top_start_x || (o)->strut.top_end_x || (o)->strut.top) \
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{ \
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if((o)->strut.top) \
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top = MAX(top, (o)->strut.top); \
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else \
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top = MAX(top, ((o)->geometry.y - area.y) + (o)->geometry.height); \
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} \
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if((o)->strut.bottom_start_x || (o)->strut.bottom_end_x || (o)->strut.bottom) \
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{ \
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if((o)->strut.bottom) \
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bottom = MAX(bottom, (o)->strut.bottom); \
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else \
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bottom = MAX(bottom, (area.y + area.height) - (o)->geometry.y); \
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} \
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if((o)->strut.left_start_y || (o)->strut.left_end_y || (o)->strut.left) \
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{ \
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if((o)->strut.left) \
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left = MAX(left, (o)->strut.left); \
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else \
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left = MAX(left, ((o)->geometry.x - area.x) + (o)->geometry.width); \
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} \
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if((o)->strut.right_start_y || (o)->strut.right_end_y || (o)->strut.right) \
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{ \
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if((o)->strut.right) \
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right = MAX(right, (o)->strut.right); \
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else \
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right = MAX(right, (area.x + area.width) - (o)->geometry.x); \
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} \
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}
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foreach(c, globalconf.clients)
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if((*c)->screen == screen && client_isvisible(*c))
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COMPUTE_STRUT(*c)
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foreach(drawin, globalconf.drawins)
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if((*drawin)->visible)
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{
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screen_t *d_screen =
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screen_getbycoord((*drawin)->geometry.x, (*drawin)->geometry.y);
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if (d_screen == screen)
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COMPUTE_STRUT(*drawin)
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}
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#undef COMPUTE_STRUT
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area.x += left;
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area.y += top;
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area.width -= left + right;
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area.height -= top + bottom;
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return area;
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}
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/** Get display info.
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* \return The display area.
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*/
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area_t
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display_area_get(void)
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{
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xcb_screen_t *s = globalconf.screen;
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area_t area = { .x = 0,
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.y = 0,
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.width = s->width_in_pixels,
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.height = s->height_in_pixels };
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return area;
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}
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/** Move a client to a virtual screen.
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* \param c The client to move.
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* \param new_screen The destination screen.
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* \param doresize Set to true if we also move the client to the new x and
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* y of the new screen.
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*/
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void
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screen_client_moveto(client_t *c, screen_t *new_screen, bool doresize)
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{
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lua_State *L = globalconf_get_lua_State();
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screen_t *old_screen = c->screen;
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area_t from, to;
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bool had_focus = false;
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if(new_screen == c->screen)
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return;
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if (globalconf.focus.client == c)
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had_focus = true;
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c->screen = new_screen;
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if(!doresize)
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{
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luaA_object_push(L, c);
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if(old_screen != NULL)
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luaA_pushscreen(L, old_screen);
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else
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lua_pushnil(L);
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luaA_object_emit_signal(L, -2, "property::screen", 1);
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lua_pop(L, 1);
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if(had_focus)
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client_focus(c);
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return;
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}
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from = screen_area_get(old_screen, false);
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to = screen_area_get(c->screen, false);
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|
|
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);
|
|
|
|
/* Emit signal, but only in case the call to client_resize had not changed
|
|
* it already. */
|
|
if(old_screen != c->screen)
|
|
{
|
|
luaA_object_push(L, c);
|
|
if(old_screen != NULL)
|
|
luaA_pushscreen(L, old_screen);
|
|
else
|
|
lua_pushnil(L);
|
|
luaA_object_emit_signal(L, -2, "property::screen", 1);
|
|
lua_pop(L, 1);
|
|
}
|
|
|
|
if(had_focus)
|
|
client_focus(c);
|
|
}
|
|
|
|
/** Get a screen's index. */
|
|
int
|
|
screen_get_index(screen_t *s)
|
|
{
|
|
int res = 0;
|
|
foreach(screen, globalconf.screens)
|
|
{
|
|
res++;
|
|
if (*screen == s)
|
|
return res;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
screen_update_primary(void)
|
|
{
|
|
if (!globalconf.have_randr_13)
|
|
return;
|
|
|
|
screen_t *primary_screen = NULL;
|
|
xcb_randr_get_output_primary_reply_t *primary =
|
|
xcb_randr_get_output_primary_reply(globalconf.connection,
|
|
xcb_randr_get_output_primary(globalconf.connection, globalconf.screen->root),
|
|
NULL);
|
|
|
|
if (!primary)
|
|
return;
|
|
|
|
foreach(screen, globalconf.screens)
|
|
{
|
|
foreach(output, (*screen)->outputs)
|
|
if (output->output == primary->output)
|
|
primary_screen = *screen;
|
|
}
|
|
p_delete(&primary);
|
|
|
|
if (!primary_screen || primary_screen == globalconf.primary_screen)
|
|
return;
|
|
|
|
lua_State *L = globalconf_get_lua_State();
|
|
screen_t *old = globalconf.primary_screen;
|
|
globalconf.primary_screen = primary_screen;
|
|
|
|
if (old)
|
|
{
|
|
luaA_object_push(L, old);
|
|
luaA_object_emit_signal(L, -1, "primary_changed", 0);
|
|
lua_pop(L, 1);
|
|
}
|
|
luaA_object_push(L, primary_screen);
|
|
luaA_object_emit_signal(L, -1, "primary_changed", 0);
|
|
lua_pop(L, 1);
|
|
}
|
|
|
|
screen_t *
|
|
screen_get_primary(void)
|
|
{
|
|
if (!globalconf.primary_screen && globalconf.screens.len > 0)
|
|
globalconf.primary_screen = globalconf.screens.tab[0];
|
|
return globalconf.primary_screen;
|
|
}
|
|
|
|
/** 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(lua_type(L, 2) == LUA_TSTRING && (name = lua_tostring(L, 2)))
|
|
{
|
|
if(A_STREQ(name, "primary"))
|
|
return luaA_object_push(L, screen_get_primary());
|
|
|
|
foreach(screen, globalconf.screens)
|
|
foreach(output, (*screen)->outputs)
|
|
if(A_STREQ(output->name, name))
|
|
return luaA_object_push(L, screen);
|
|
}
|
|
|
|
return luaA_object_push(L, luaA_checkscreen(L, 2));
|
|
}
|
|
|
|
LUA_OBJECT_EXPORT_PROPERTY(screen, screen_t, geometry, luaA_pusharea)
|
|
|
|
static int
|
|
luaA_screen_get_index(lua_State *L, screen_t *s)
|
|
{
|
|
lua_pushinteger(L, screen_get_index(s));
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
luaA_screen_get_outputs(lua_State *L, screen_t *s)
|
|
{
|
|
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);
|
|
}
|
|
/* The table of tables we created. */
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
luaA_screen_get_workarea(lua_State *L, screen_t *s)
|
|
{
|
|
luaA_pusharea(L, screen_area_get(s, true));
|
|
return 1;
|
|
}
|
|
|
|
/** Get the number of screens.
|
|
*
|
|
* @return The screen count, at least 1.
|
|
* @function count
|
|
*/
|
|
static int
|
|
luaA_screen_count(lua_State *L)
|
|
{
|
|
lua_pushinteger(L, globalconf.screens.len);
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
screen_class_setup(lua_State *L)
|
|
{
|
|
static const struct luaL_Reg screen_methods[] =
|
|
{
|
|
LUA_CLASS_METHODS(screen)
|
|
{ "count", luaA_screen_count },
|
|
{ "__index", luaA_screen_module_index },
|
|
{ "__newindex", luaA_default_newindex },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
static const struct luaL_Reg screen_meta[] =
|
|
{
|
|
LUA_OBJECT_META(screen)
|
|
LUA_CLASS_META
|
|
{ NULL, NULL },
|
|
};
|
|
|
|
luaA_class_setup(L, &screen_class, "screen", NULL,
|
|
(lua_class_allocator_t) screen_new,
|
|
(lua_class_collector_t) screen_wipe,
|
|
NULL,
|
|
luaA_class_index_miss_property, luaA_class_newindex_miss_property,
|
|
screen_methods, screen_meta);
|
|
luaA_class_add_property(&screen_class, "geometry",
|
|
NULL,
|
|
(lua_class_propfunc_t) luaA_screen_get_geometry,
|
|
NULL);
|
|
luaA_class_add_property(&screen_class, "index",
|
|
NULL,
|
|
(lua_class_propfunc_t) luaA_screen_get_index,
|
|
NULL);
|
|
luaA_class_add_property(&screen_class, "outputs",
|
|
NULL,
|
|
(lua_class_propfunc_t) luaA_screen_get_outputs,
|
|
NULL);
|
|
luaA_class_add_property(&screen_class, "workarea",
|
|
NULL,
|
|
(lua_class_propfunc_t) luaA_screen_get_workarea,
|
|
NULL);
|
|
/**
|
|
* @signal property::workarea
|
|
*/
|
|
signal_add(&screen_class.signals, "property::workarea");
|
|
/**
|
|
* @signal primary_changed
|
|
*/
|
|
signal_add(&screen_class.signals, "primary_changed");
|
|
}
|
|
|
|
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
|