/* * screen.c - screen management * * Copyright © 2007-2009 Julien Danjou * * 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 #include #include #include #include "screen.h" #include "ewmh.h" #include "objects/tag.h" #include "objects/client.h" #include "objects/drawin.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((*c)->screen == screen && client_isvisible(*c)) COMPUTE_STRUT(*c) foreach(drawin, globalconf.drawins) if((*drawin)->visible) { screen_t *d_screen = screen_getbycoord((*drawin)->geometry.x, (*drawin)->geometry.y); if (d_screen == screen) COMPUTE_STRUT(*drawin) } #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; bool had_focus = false; if(new_screen == c->screen) return; if (globalconf.focus.client == c) had_focus = true; 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); if(had_focus) client_focus(c); 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); luaA_object_push(globalconf.L, c); luaA_object_emit_signal(globalconf.L, -1, "property::screen", 0); lua_pop(globalconf.L, 1); if(had_focus) client_focus(c); } /** 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) { screen_t **ps = lua_newuserdata(L, sizeof(*ps)); *ps = 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_STREQ(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 **ps = luaL_checkudata(L, 1, "screen"); screen_t *s = *ps; 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 **ps; 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); ps = luaL_checkudata(L, 1, "screen"); s = *ps; if(A_STREQ(buf, "index")) { lua_pushinteger(L, screen_array_indexof(&globalconf.screens, s) + 1); return 1; } if(A_STREQ(buf, "geometry")) { luaA_pusharea(L, s->geometry); return 1; } if(A_STREQ(buf, "workarea")) { luaA_pusharea(L, screen_area_get(s, true)); return 1; } if(A_STREQ(buf, "outputs")) { 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; } return 0; } /** A screen. * \param L The Lua VM state. * \return The number of elements pushed on stack. */ static int luaA_screen_equal(lua_State *L) { screen_t **ps1; screen_t **ps2; ps1 = luaL_checkudata(L, 1, "screen"); ps2 = luaL_checkudata(L, 2, "screen"); lua_pushboolean(L, *ps1 == *ps2); 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 **ps = luaL_checkudata(L, 1, "screen"); screen_t *s = *ps; 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 **ps = luaL_checkudata(L, 1, "screen"); screen_t *s = *ps; 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 **ps = luaL_checkudata(L, 1, "screen"); screen_t *s = *ps; 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_t **ps = luaL_checkudata(L, 1, "screen"); screen_emit_signal(L, *ps, 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; } /** Get a screen by coordinates. * \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_by_coords(lua_State *L) { int x = luaL_checknumber(L, 1); int y = luaL_checknumber(L, 2); luaA_pushscreen(L, screen_getbycoord(x, y)); return 1; } const struct luaL_reg awesome_screen_methods[] = { { "count", luaA_screen_count }, { "by_coords", luaA_screen_by_coords }, { "__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 }, { "__eq", luaA_screen_equal }, { NULL, NULL } }; // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80