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awesome/objects/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.
*
*/
/** A physical or virtual screen object.
*
* Screen objects can be added and removed over time. To get a callback for all
* current and future screens, use `awful.screen.connect_for_each_screen`:
*
* awful.screen.connect_for_each_screen(function(s)
* -- do something
* end)
*
* It is also possible loop over all current screens using:
*
* for s in screen do
* -- do something
* end
*
* Most basic Awesome objects also have a screen property, see `mouse.screen`
* `client.screen`, `wibox.screen` and `tag.screen`.
*
* @DOC_uml_nav_tables_screen_EXAMPLE@
*
* @author Julien Danjou &lt;julien@danjou.info&gt;
* @copyright 2008-2009 Julien Danjou
* @coreclassmod screen
*/
#include "objects/screen.h"
#include "banning.h"
#include "objects/client.h"
#include "objects/drawin.h"
#include "event.h"
#include <stdio.h>
#include <xcb/xcb.h>
#include <xcb/xinerama.h>
#include <xcb/randr.h>
/* The XID that is used on fake screens. X11 guarantees that the top three bits
* of a valid XID are zero, so this will not clash with anything.
*/
#define FAKE_SCREEN_XID ((uint32_t) 0xffffffff)
/** AwesomeWM is about to scan for existing screens.
*
* Connect to this signal when code needs to be executed after the Lua context
* is initialized and modules are loaded, but before screens are added.
*
* To manage screens manually, set `screen.automatic_factory = false` and
* connect to the `property::viewports` signal. It is then possible to use
* `screen.fake_add` to create virtual screens. Be careful when using this,
* when done incorrectly, no screens will be created. Using Awesome with zero
* screens is **not** supported.
*
* @signal scanning
* @see property::viewports
* @see screen.fake_add
*/
/** AwesomeWM is done scanning for screens.
*
* Connect to this signal to execute code after the screens have been created,
* but before the clients are added. This signal can also be used to split
* physical screens into multiple virtual screens before the clients (and their
* rules) are executed.
*
* Note that if no screens exist at this point, the fallback code will be
* triggered and the default (detected) screens will be added.
*
* @signal scanned
* @see screen.fake_resize
* @see screen.fake_add
*/
/** Screen is a table where indexes are screen numbers. You can use `screen[1]`
* to get access to the first screen, etc. Alternatively, if RANDR information
* is available, you can use output names for finding screen objects.
* The primary screen can be accessed as `screen.primary`.
* Each screen has a set of properties.
*
*/
/**
* @signal primary_changed
*/
/**
* This signal is emitted when a new screen is added to the current setup.
* @signal added
*/
/**
* This signal is emitted when a screen is removed from the setup.
* @signal removed
* @request tag screen removed granted When a screen is removed, `request::screen`
* is called on all screen tags to try to relocate them.
*/
/** This signal is emitted when the list of available screens changes.
* @signal list
*/
/** When 2 screens are swapped
* @tparam screen screen The other screen
* @tparam boolean is_source If self is the source or the destination of the swap
* @signal swapped
*/
/** This signal is emitted when the list of physical screen viewport changes.
*
* Each viewport in the list corresponds to a **physical** screen rectangle, which
* is **not** the `viewports` property of the `screen` objects.
*
* Each entry in the `viewports` entry has the following keys:
*
* * `geometry` *(table)*: A table with an `x`, `y`, `width` and `height` keys.
* * `outputs` *(table)*: All outputs sharing this viewport.
* * `maximum_dpi` *(number)*: The DPI of the most dense output.
* * `minimum_dpi` *(number)*: The DPI of the least dense output.
* * `preferred_dpi` *(number)*: The optimal DPI.
*
* @signal property::viewports
* @tparam table viewports A table containing all physical viewports.
* @see automatic_factory
*/
/**
* The primary screen.
*
* @tfield screen primary
*/
/**
* If `screen` objects are created automatically when new viewports are detected.
*
* Be very, very careful when setting this to false. You might end up with
* no screens. This is **not** supported. Always connect to the `scanned`
* signal to make sure to create a fallback screen if none were created.
*
* @tfield[opt=true] boolean screen.automatic_factory
* @see property::viewports
*/
/**
* The screen coordinates.
*
* The returned table contains the `x`, `y`, `width` and `height` keys.
*
* @DOC_screen_geometry_EXAMPLE@
*
* @property geometry
* @tparam table geometry
* @tfield integer table.x The horizontal position.
* @tfield integer table.y The vertical position.
* @tfield integer table.width The width.
* @tfield integer table.height The height.
* @propemits false false
* @readonly
*/
/**
* The internal screen number.
*
* * The indeces are a continuous sequence from 1 to `screen.count()`.
* * It is **NOT** related to the actual screen position relative to each
* other.
* * 1 is **NOT** necessarily the primary screen.
* * When screens are added and removed indices **CAN** change.
*
* If you really want to keep an array of screens you should use something
* along:
*
* local myscreens = setmetatable({}. {__mode="k"})
* myscreens[ screen[1] ] = "mydata"
*
* But it might be a better option to simply store the data directly in the
* screen object as:
*
* screen[1].mydata = "mydata"
*
* Remember that screens are also objects, so if you only want to store a simple
* property, you can do it directly:
*
* screen[1].answer = 42
*
* @property index
* @tparam integer index
* @see screen
* @readonly
*/
/**
* The screen workarea.
*
* The workarea is a subsection of the screen where clients can be placed. It
* usually excludes the toolbars (see `awful.wibar`) and dockable clients
* (see `client.dockable`) like WindowMaker DockAPP.
*
* It can be modified be altering the `wibox` or `client` struts.
*
* @DOC_screen_workarea_EXAMPLE@
*
* @property workarea
* @tparam table workarea
* @tfield integer table.x The horizontal position
* @tfield integer table.y The vertical position
* @tfield integer table.width The width
* @tfield integer table.height The height
* @propemits false false
* @see client.struts
* @readonly
*/
/** Get the number of instances.
*
* @treturn table The number of screen objects alive.
* @staticfct instances
*/
/* Set a __index metamethod for all screen instances.
* @tparam function cb The meta-method
* @staticfct set_index_miss_handler
*/
/* Set a __newindex metamethod for all screen instances.
* @tparam function cb The meta-method
* @staticfct set_newindex_miss_handler
*/
DO_ARRAY(xcb_randr_output_t, randr_output, DO_NOTHING);
struct screen_output_t
{
/** The XRandR names of the output */
char *name;
/** The size in millimeters */
uint32_t mm_width, mm_height;
/** The XID */
randr_output_array_t outputs;
};
static void
screen_output_wipe(screen_output_t *output)
{
p_delete(&output->name);
randr_output_array_wipe(&output->outputs);
}
ARRAY_FUNCS(screen_output_t, screen_output, screen_output_wipe)
static lua_class_t screen_class;
LUA_OBJECT_FUNCS(screen_class, screen_t, screen)
/** Check if a screen is valid */
static bool
screen_checker(screen_t *s)
{
return s->valid;
}
/** Get a screen argument from the lua stack */
screen_t *
luaA_checkscreen(lua_State *L, int sidx)
{
if (lua_isnumber(L, sidx))
{
int screen = lua_tointeger(L, sidx);
if(screen < 1 || screen > globalconf.screens.len)
{
luaA_warn(L, "invalid screen number: %d (of %d existing)", screen, globalconf.screens.len);
lua_pushnil(L);
return NULL;
}
return globalconf.screens.tab[screen - 1];
} else
return luaA_checkudata(L, sidx, &screen_class);
}
static void
screen_deduplicate(lua_State *L, screen_array_t *screens)
{
/* Remove duplicate screens */
for(int first = 0; first < screens->len; first++) {
screen_t *first_screen = screens->tab[first];
for(int second = 0; second < screens->len; second++) {
screen_t *second_screen = screens->tab[second];
if (first == second)
continue;
if (first_screen->geometry.width < second_screen->geometry.width
&& first_screen->geometry.height < second_screen->geometry.height)
/* Don't drop a smaller screen */
continue;
if (first_screen->geometry.x == second_screen->geometry.x
&& first_screen->geometry.y == second_screen->geometry.y) {
/* Found a duplicate */
first_screen->geometry.width = MAX(first_screen->geometry.width, second_screen->geometry.width);
first_screen->geometry.height = MAX(first_screen->geometry.height, second_screen->geometry.height);
screen_array_take(screens, second);
luaA_object_unref(L, second_screen);
/* Restart the search */
screen_deduplicate(L, screens);
return;
}
}
}
}
/** Keep track of the screen viewport(s) independently from the screen objects.
*
* A viewport is a collection of `outputs` objects and their associated
* metadata. This structure is copied into Lua and then further extended from
* there. The `id` field allows to differentiate between viewports that share
* the same position and dimensions without having to rely on userdata pointer
* comparison.
*
* Screen objects are widely used by the public API and imply a very "visible"
* concept. A viewport is a subset of what the concerns the "screen" class
* previously handled. It is meant to be used by some low level Lua logic to
* create screens from Lua rather than from C. This is required to increase the
* flexibility of multi-screen setup or when screens are connected and
* disconnected often.
*
* Design rationals:
*
* * The structure is not directly shared with Lua to avoid having to use the
* slow "miss_handler" and unsafe "valid" systems used by other CAPI objects.
* * The `viewport_t` implements a linked-list because its main purpose is to
* offers a deduplication algorithm. Random access is never required.
* * Everything that can be done in Lua is done in Lua.
* * Since the legacy and "new" way to initialize screens share a lot of steps,
* the C code is bent to share as much code as possible. This will reduce the
* "dead code" and improve code coverage by the tests.
*
*/
typedef struct viewport_t
{
bool marked;
int x;
int y;
int width;
int height;
int id;
struct viewport_t *next;
screen_t *screen;
screen_output_array_t outputs;
} viewport_t;
static viewport_t *first_screen_viewport = NULL;
static viewport_t *last_screen_viewport = NULL;
static int screen_area_gid = 1;
static void
luaA_viewport_get_outputs(lua_State *L, viewport_t *a)
{
lua_createtable(L, 0, a ? a->outputs.len : 0);
if (!a)
return;
int count = 1;
foreach(output, a->outputs) {
lua_createtable(L, 3, 0);
lua_pushstring(L, "mm_width");
lua_pushinteger(L, output->mm_width);
lua_settable(L, -3);
lua_pushstring(L, "mm_height");
lua_pushinteger(L, output->mm_height);
lua_settable(L, -3);
lua_pushstring(L, "name");
lua_pushstring(L, output->name);
lua_settable(L, -3);
lua_pushstring(L, "viewport_id");
lua_pushinteger(L, a->id);
lua_settable(L, -3);
/* Add to the outputs */
lua_rawseti(L, -2, count++);
}
}
static int
luaA_viewports(lua_State *L)
{
/* All viewports */
lua_newtable(L);
viewport_t *a = first_screen_viewport;
if (!a)
return 1;
int count = 1;
do {
lua_newtable(L);
/* The geometry */
lua_pushstring(L, "geometry");
lua_newtable(L);
lua_pushstring(L, "x");
lua_pushinteger(L, a->x);
lua_settable(L, -3);
lua_pushstring(L, "y");
lua_pushinteger(L, a->y);
lua_settable(L, -3);
lua_pushstring(L, "width");
lua_pushinteger(L, a->width);
lua_settable(L, -3);
lua_pushstring(L, "height");
lua_pushinteger(L, a->height);
lua_settable(L, -3);
/* Add the geometry table to the arguments */
lua_settable(L, -3);
/* Add the outputs table to the arguments */
lua_pushstring(L, "outputs");
luaA_viewport_get_outputs(L, a);
lua_settable(L, -3);
/* Add an identifier to better detect when screens are removed */
lua_pushstring(L, "id");
lua_pushinteger(L, a->id);
lua_settable(L, -3);
lua_rawseti(L, -2, count++);
} while ((a = a->next));
return 1;
}
/* Give Lua a chance to handle or blacklist a viewport before creating the
* screen object.
*/
static void
viewports_notify(lua_State *L)
{
if (!first_screen_viewport)
return;
luaA_viewports(L);
luaA_class_emit_signal(L, &screen_class, "property::_viewports", 1);
}
static viewport_t *
viewport_add(lua_State *L, int x, int y, int w, int h)
{
/* Search existing to avoid having to deduplicate later */
viewport_t *a = first_screen_viewport;
do
{
if (a && a->x == x && a->y == y && a->width == w && a->height == h)
{
a->marked = true;
return a;
}
} while (a && (a = a->next));
viewport_t *node = malloc(sizeof(viewport_t));
node->x = x;
node->y = y;
node->width = w;
node->height = h;
node->id = screen_area_gid++;
node->next = NULL;
node->screen = NULL;
node->marked = true;
screen_output_array_init(&node->outputs);
if (!first_screen_viewport) {
first_screen_viewport = node;
last_screen_viewport = node;
} else {
last_screen_viewport->next = node;
last_screen_viewport = node;
}
assert(first_screen_viewport && last_screen_viewport);
return node;
}
static void
monitor_unmark(void)
{
viewport_t *a = first_screen_viewport;
if (!a)
return;
do
{
a->marked = false;
} while((a = a->next));
}
static void
viewport_purge(void)
{
viewport_t *cur = first_screen_viewport;
/* Move the head of the list */
while (first_screen_viewport && !first_screen_viewport->marked) {
cur = first_screen_viewport;
first_screen_viewport = cur->next;
foreach(existing_screen, globalconf.screens)
if ((*existing_screen)->viewport == cur)
(*existing_screen)->viewport = NULL;
screen_output_array_wipe(&cur->outputs);
free(cur);
}
if (!first_screen_viewport) {
last_screen_viewport = NULL;
return;
}
cur = first_screen_viewport;
/* Drop unmarked entries */
do {
if (cur->next && !cur->next->marked) {
viewport_t *tmp = cur->next;
cur->next = cur->next->next;
if (tmp == last_screen_viewport)
last_screen_viewport = cur;
foreach(existing_screen, globalconf.screens)
if ((*existing_screen)->viewport == tmp)
(*existing_screen)->viewport = NULL;
screen_output_array_wipe(&tmp->outputs);
free(tmp);
} else
cur = cur->next;
} while(cur);
}
static screen_t *
screen_add(lua_State *L, screen_array_t *screens)
{
screen_t *new_screen = screen_new(L);
luaA_object_ref(L, -1);
screen_array_append(screens, new_screen);
new_screen->xid = XCB_NONE;
new_screen->lifecycle = SCREEN_LIFECYCLE_USER;
return new_screen;
}
static void
screen_wipe(screen_t *c)
{
if (c->name) {
free(c->name);
c->name = NULL;
}
}
/* Monitors were introduced in RandR 1.5 */
#ifdef XCB_RANDR_GET_MONITORS
static screen_output_t
screen_get_randr_output(lua_State *L, xcb_randr_monitor_info_iterator_t *it)
{
screen_output_t output;
xcb_randr_output_t *randr_outputs;
xcb_get_atom_name_cookie_t name_c;
xcb_get_atom_name_reply_t *name_r;
output.mm_width = it->data->width_in_millimeters;
output.mm_height = it->data->height_in_millimeters;
name_c = xcb_get_atom_name_unchecked(globalconf.connection, it->data->name);
name_r = xcb_get_atom_name_reply(globalconf.connection, name_c, NULL);
if (name_r) {
const char *name = xcb_get_atom_name_name(name_r);
size_t len = xcb_get_atom_name_name_length(name_r);
output.name = memcpy(p_new(char *, len + 1), name, len);
output.name[len] = '\0';
p_delete(&name_r);
} else {
output.name = a_strdup("unknown");
}
randr_output_array_init(&output.outputs);
randr_outputs = xcb_randr_monitor_info_outputs(it->data);
for(int i = 0; i < xcb_randr_monitor_info_outputs_length(it->data); i++) {
randr_output_array_append(&output.outputs, randr_outputs[i]);
}
return output;
}
static void
screen_scan_randr_monitors(lua_State *L, screen_array_t *screens)
{
xcb_randr_get_monitors_cookie_t monitors_c = xcb_randr_get_monitors(globalconf.connection, globalconf.screen->root, 1);
xcb_randr_get_monitors_reply_t *monitors_r = xcb_randr_get_monitors_reply(globalconf.connection, monitors_c, NULL);
xcb_randr_monitor_info_iterator_t monitor_iter;
if (monitors_r == NULL) {
warn("RANDR GetMonitors failed; this should not be possible");
return;
}
for(monitor_iter = xcb_randr_get_monitors_monitors_iterator(monitors_r);
monitor_iter.rem; xcb_randr_monitor_info_next(&monitor_iter))
{
screen_t *new_screen;
if(!xcb_randr_monitor_info_outputs_length(monitor_iter.data))
continue;
screen_output_t output = screen_get_randr_output(L, &monitor_iter);
viewport_t *viewport = viewport_add(L,
monitor_iter.data->x,
monitor_iter.data->y,
monitor_iter.data->width,
monitor_iter.data->height
);
screen_output_array_append(&viewport->outputs, output);
if (globalconf.ignore_screens)
continue;
new_screen = screen_add(L, screens);
new_screen->lifecycle |= SCREEN_LIFECYCLE_C;
viewport->screen = new_screen;
new_screen->viewport = viewport;
new_screen->geometry.x = monitor_iter.data->x;
new_screen->geometry.y = monitor_iter.data->y;
new_screen->geometry.width = monitor_iter.data->width;
new_screen->geometry.height = monitor_iter.data->height;
new_screen->xid = monitor_iter.data->name;
}
p_delete(&monitors_r);
}
#else
static void
screen_scan_randr_monitors(lua_State *L, screen_array_t *screens)
{
}
#endif
static void
screen_get_randr_crtcs_outputs(lua_State *L, xcb_randr_get_crtc_info_reply_t *crtc_info_r, screen_output_array_t *outputs)
{
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);
screen_output_t output;
if (!output_info_r) {
warn("RANDR GetOutputInfo failed; this should not be possible");
continue;
}
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';
output.name = name;
output.mm_width = output_info_r->mm_width;
output.mm_height = output_info_r->mm_height;
randr_output_array_init(&output.outputs);
randr_output_array_append(&output.outputs, randr_outputs[j]);
screen_output_array_append(outputs, output);
p_delete(&output_info_r);
}
}
static void
screen_scan_randr_crtcs(lua_State *L, screen_array_t *screens)
{
/* 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);
if (screen_res_r == NULL) {
warn("RANDR GetScreenResources failed; this should not be possible");
return;
}
/* 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_info_r) {
warn("RANDR GetCRTCInfo failed; this should not be possible");
continue;
}
/* If CRTC has no OUTPUT, ignore it */
if(!xcb_randr_get_crtc_info_outputs_length(crtc_info_r))
continue;
viewport_t *viewport = viewport_add(L,
crtc_info_r->x,
crtc_info_r->y,
crtc_info_r->width,
crtc_info_r->height
);
screen_get_randr_crtcs_outputs(L, crtc_info_r, &viewport->outputs);
if (globalconf.ignore_screens)
{
p_delete(&crtc_info_r);
continue;
}
/* Prepare the new screen */
screen_t *new_screen = screen_add(L, screens);
new_screen->lifecycle |= SCREEN_LIFECYCLE_C;
viewport->screen = new_screen;
new_screen->viewport = viewport;
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;
new_screen->xid = randr_crtcs[i];
/* Detect the older NVIDIA blobs */
foreach(output, new_screen->viewport->outputs) {
if (A_STREQ(output->name, "default")) {
/* non RandR 1.2+ X driver don't return any usable multihead
* data. I'm looking at you, nvidia binary blob!
*/
warn("Ignoring RandR, only a compatibility layer is present.");
/* Get rid of the screens that we already created */
foreach(screen, *screens)
luaA_object_unref(L, *screen);
screen_array_wipe(screens);
screen_array_init(screens);
p_delete(&screen_res_r);
return;
}
}
p_delete(&crtc_info_r);
}
p_delete(&screen_res_r);
}
static void
screen_scan_randr(lua_State *L, screen_array_t *screens)
{
const xcb_query_extension_reply_t *extension_reply;
xcb_randr_query_version_reply_t *version_reply;
uint32_t major_version;
uint32_t minor_version;
/* Check for extension before checking for XRandR */
extension_reply = xcb_get_extension_data(globalconf.connection, &xcb_randr_id);
if(!extension_reply || !extension_reply->present)
return;
version_reply =
xcb_randr_query_version_reply(globalconf.connection,
xcb_randr_query_version(globalconf.connection, 1, 5), 0);
if(!version_reply)
return;
major_version = version_reply->major_version;
minor_version = version_reply->minor_version;
p_delete(&version_reply);
/* Do we agree on a supported version? */
if (major_version != 1 || minor_version < 2)
return;
globalconf.have_randr_13 = minor_version >= 3;
#if XCB_RANDR_MAJOR_VERSION > 1 || XCB_RANDR_MINOR_VERSION >= 5
globalconf.have_randr_15 = minor_version >= 5;
#else
globalconf.have_randr_15 = false;
#endif
/* We want to know when something changes */
xcb_randr_select_input(globalconf.connection,
globalconf.screen->root,
XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE);
if (globalconf.have_randr_15)
screen_scan_randr_monitors(L, screens);
else
screen_scan_randr_crtcs(L, screens);
if (screens->len == 0 && !globalconf.ignore_screens)
{
/* Scanning failed, disable randr again */
xcb_randr_select_input(globalconf.connection,
globalconf.screen->root,
0);
globalconf.have_randr_13 = false;
globalconf.have_randr_15 = false;
}
}
static void
screen_scan_xinerama(lua_State *L, screen_array_t *screens)
{
bool xinerama_is_active;
const xcb_query_extension_reply_t *extension_reply;
xcb_xinerama_is_active_reply_t *xia;
xcb_xinerama_query_screens_reply_t *xsq;
xcb_xinerama_screen_info_t *xsi;
int xinerama_screen_number;
/* Check for extension before checking for Xinerama */
extension_reply = xcb_get_extension_data(globalconf.connection, &xcb_xinerama_id);
if(!extension_reply || !extension_reply->present)
return;
xia = xcb_xinerama_is_active_reply(globalconf.connection, xcb_xinerama_is_active(globalconf.connection), NULL);
xinerama_is_active = xia && xia->state;
p_delete(&xia);
if(!xinerama_is_active)
return;
xsq = xcb_xinerama_query_screens_reply(globalconf.connection,
xcb_xinerama_query_screens_unchecked(globalconf.connection),
NULL);
if(!xsq) {
warn("Xinerama QueryScreens failed; this should not be possible");
return;
}
xsi = xcb_xinerama_query_screens_screen_info(xsq);
xinerama_screen_number = xcb_xinerama_query_screens_screen_info_length(xsq);
for(int screen = 0; screen < xinerama_screen_number; screen++)
{
viewport_t *viewport = viewport_add(L,
xsi[screen].x_org,
xsi[screen].y_org,
xsi[screen].width,
xsi[screen].height
);
if (globalconf.ignore_screens)
continue;
screen_t *s = screen_add(L, screens);
viewport->screen = s;
s->viewport = viewport;
s->lifecycle |= SCREEN_LIFECYCLE_C;
s->geometry.x = xsi[screen].x_org;
s->geometry.y = xsi[screen].y_org;
s->geometry.width = xsi[screen].width;
s->geometry.height = xsi[screen].height;
}
p_delete(&xsq);
}
static void screen_scan_x11(lua_State *L, screen_array_t *screens)
{
xcb_screen_t *xcb_screen = globalconf.screen;
viewport_t *viewport = viewport_add(L,
0,
0,
xcb_screen->width_in_pixels,
xcb_screen->height_in_pixels
);
if (globalconf.ignore_screens)
return;
screen_t *s = screen_add(L, screens);
viewport->screen = s;
s->lifecycle |= SCREEN_LIFECYCLE_C;
s->viewport = viewport;
s->geometry.x = 0;
s->geometry.y = 0;
s->geometry.width = xcb_screen->width_in_pixels;
s->geometry.height = xcb_screen->height_in_pixels;
}
static void
screen_added(lua_State *L, screen_t *screen)
{
screen->workarea = screen->geometry;
screen->valid = true;
luaA_object_push(L, screen);
luaA_object_emit_signal(L, -1, "_added", 0);
lua_pop(L, 1);
}
void
screen_emit_scanned(void)
{
lua_State *L = globalconf_get_lua_State();
luaA_class_emit_signal(L, &screen_class, "scanned", 0);
}
void
screen_emit_scanning(void)
{
lua_State *L = globalconf_get_lua_State();
luaA_class_emit_signal(L, &screen_class, "scanning", 0);
}
static void
screen_scan_common(bool quiet)
{
lua_State *L;
L = globalconf_get_lua_State();
monitor_unmark();
screen_scan_randr(L, &globalconf.screens);
if (globalconf.screens.len == 0)
screen_scan_xinerama(L, &globalconf.screens);
if (globalconf.screens.len == 0)
screen_scan_x11(L, &globalconf.screens);
check(globalconf.screens.len > 0 || globalconf.ignore_screens);
screen_deduplicate(L, &globalconf.screens);
foreach(screen, globalconf.screens) {
screen_added(L, *screen);
}
viewport_purge();
if (!quiet)
viewports_notify(L);
screen_update_primary();
}
/** Get screens informations and fill global configuration.
*/
void
screen_scan(void)
{
screen_emit_scanning();
screen_scan_common(false);
}
static int
luaA_scan_quiet(lua_State *L)
{
screen_scan_common(true);
return 0;
}
/* Called when a screen is removed, removes references to the old screen */
static void
screen_removed(lua_State *L, int sidx)
{
screen_t *screen = luaA_checkudata(L, sidx, &screen_class);
luaA_object_emit_signal(L, sidx, "removed", 0);
if (globalconf.primary_screen == screen)
globalconf.primary_screen = NULL;
foreach(c, globalconf.clients) {
if((*c)->screen == screen)
screen_client_moveto(*c, screen_getbycoord(
(*c)->geometry.x, (*c)->geometry.y), false);
}
}
void screen_cleanup(void)
{
while(globalconf.screens.len)
screen_array_take(&globalconf.screens, 0);
monitor_unmark();
viewport_purge();
}
static void
screen_modified(screen_t *existing_screen, screen_t *other_screen)
{
lua_State *L = globalconf_get_lua_State();
if(!AREA_EQUAL(existing_screen->geometry, other_screen->geometry)) {
area_t old_geometry = existing_screen->geometry;
existing_screen->geometry = other_screen->geometry;
luaA_object_push(L, existing_screen);
luaA_pusharea(L, old_geometry);
luaA_object_emit_signal(L, -2, "property::geometry", 1);
lua_pop(L, 1);
screen_update_workarea(existing_screen);
}
const int other_len = other_screen->viewport ?
other_screen->viewport->outputs.len : 0;
const int existing_len = existing_screen->viewport ?
existing_screen->viewport->outputs.len : 0;
bool outputs_changed = (!(existing_screen->viewport && other_screen->viewport))
|| existing_len != other_len;
if(existing_screen->viewport && other_screen->viewport && !outputs_changed)
for(int i = 0; i < existing_screen->viewport->outputs.len; i++) {
screen_output_t *existing_output = &existing_screen->viewport->outputs.tab[i];
screen_output_t *other_output = &other_screen->viewport->outputs.tab[i];
outputs_changed |= existing_output->mm_width != other_output->mm_width;
outputs_changed |= existing_output->mm_height != other_output->mm_height;
outputs_changed |= A_STRNEQ(existing_output->name, other_output->name);
}
/* Brute-force update the outputs by swapping */
if(existing_screen->viewport || other_screen->viewport) {
viewport_t *tmp = other_screen->viewport;
other_screen->viewport = existing_screen->viewport;
existing_screen->viewport = tmp;
if(outputs_changed) {
luaA_object_push(L, existing_screen);
luaA_object_emit_signal(L, -1, "property::_outputs", 0);
lua_pop(L, 1);
}
}
}
static gboolean
screen_refresh(gpointer unused)
{
globalconf.screen_refresh_pending = false;
monitor_unmark();
screen_array_t new_screens;
screen_array_t removed_screens;
lua_State *L = globalconf_get_lua_State();
bool list_changed = false;
screen_array_init(&new_screens);
if (globalconf.have_randr_15)
screen_scan_randr_monitors(L, &new_screens);
else
screen_scan_randr_crtcs(L, &new_screens);
viewport_purge();
viewports_notify(L);
screen_deduplicate(L, &new_screens);
/* Running without any screens at all is no fun. */
if (new_screens.len == 0)
screen_scan_x11(L, &new_screens);
/* Add new screens */
foreach(new_screen, new_screens) {
bool found = false;
foreach(old_screen, globalconf.screens)
found |= (*new_screen)->xid == (*old_screen)->xid;
if(!found) {
screen_array_append(&globalconf.screens, *new_screen);
screen_added(L, *new_screen);
/* Get an extra reference since both new_screens and
* globalconf.screens reference this screen now */
luaA_object_push(L, *new_screen);
luaA_object_ref(L, -1);
list_changed = true;
}
}
/* Remove screens which are gone */
screen_array_init(&removed_screens);
for(int i = 0; i < globalconf.screens.len; i++) {
screen_t *old_screen = globalconf.screens.tab[i];
bool found = old_screen->xid == FAKE_SCREEN_XID;
foreach(new_screen, new_screens)
found |= (*new_screen)->xid == old_screen->xid;
if(old_screen->lifecycle & SCREEN_LIFECYCLE_C && !found) {
screen_array_take(&globalconf.screens, i);
i--;
screen_array_append(&removed_screens, old_screen);
list_changed = true;
}
}
foreach(old_screen, removed_screens) {
luaA_object_push(L, *old_screen);
screen_removed(L, -1);
lua_pop(L, 1);
(*old_screen)->valid = false;
luaA_object_unref(L, *old_screen);
}
screen_array_wipe(&removed_screens);
/* Update changed screens */
foreach(existing_screen, globalconf.screens)
foreach(new_screen, new_screens)
if((*existing_screen)->xid == (*new_screen)->xid)
screen_modified(*existing_screen, *new_screen);
foreach(screen, new_screens)
luaA_object_unref(L, *screen);
screen_array_wipe(&new_screens);
screen_update_primary();
if (list_changed)
luaA_class_emit_signal(L, &screen_class, "list", 0);
return G_SOURCE_REMOVE;
}
void
screen_schedule_refresh(void)
{
if(globalconf.screen_refresh_pending || !globalconf.have_randr_13)
return;
globalconf.screen_refresh_pending = true;
g_idle_add_full(G_PRIORITY_LOW, screen_refresh, NULL, NULL);
}
/** Return the squared distance of the given screen to the coordinates.
* \param screen The screen
* \param x X coordinate
* \param y Y coordinate
* \return Squared distance of the point to the screen.
*/
static unsigned int
screen_get_distance_squared(screen_t *s, int x, int y)
{
int sx = s->geometry.x, sy = s->geometry.y;
int sheight = s->geometry.height, swidth = s->geometry.width;
unsigned int dist_x, dist_y;
/* Calculate distance in X coordinate */
if (x < sx)
dist_x = sx - x;
else if (x < sx + swidth)
dist_x = 0;
else
dist_x = x - sx - swidth;
/* Calculate distance in Y coordinate */
if (y < sy)
dist_y = sy - y;
else if (y < sy + sheight)
dist_y = 0;
else
dist_y = y - sy - sheight;
return dist_x * dist_x + dist_y * dist_y;
}
/** Return the first screen number where the coordinates belong to.
* \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(screen_coord_in_screen(*s, x, y))
return *s;
/* No screen found, find nearest screen. */
screen_t *nearest_screen = NULL;
unsigned int nearest_dist = UINT_MAX;
foreach(s, globalconf.screens)
{
unsigned int dist_sq = screen_get_distance_squared(*s, x, y);
if(dist_sq < nearest_dist)
{
nearest_dist = dist_sq;
nearest_screen = *s;
}
}
return nearest_screen;
}
/** Are the given coordinates in a given screen?
* \param screen The logical screen number.
* \param x X coordinate
* \param y Y coordinate
* \return True if the X/Y coordinates are in the given screen.
*/
bool
screen_coord_in_screen(screen_t *s, int x, int y)
{
return (x >= s->geometry.x && x < s->geometry.x + s->geometry.width)
&& (y >= s->geometry.y && y < s->geometry.y + s->geometry.height);
}
/** Is there any overlap between the given geometry and a given screen?
* \param screen The logical screen number.
* \param geom The geometry
* \return True if there is any overlap between the geometry and a given screen.
*/
bool
screen_area_in_screen(screen_t *s, area_t geom)
{
return (geom.x < s->geometry.x + s->geometry.width)
&& (geom.x + geom.width > s->geometry.x )
&& (geom.y < s->geometry.y + s->geometry.height)
&& (geom.y + geom.height > s->geometry.y);
}
void screen_update_workarea(screen_t *screen)
{
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 -= MIN(area.width, left + right);
area.height -= MIN(area.height, top + bottom);
if (AREA_EQUAL(area, screen->workarea))
return;
area_t old_workarea = screen->workarea;
screen->workarea = area;
lua_State *L = globalconf_get_lua_State();
luaA_object_push(L, screen);
luaA_pusharea(L, old_workarea);
luaA_object_emit_signal(L, -2, "property::workarea", 1);
lua_pop(L, 1);
}
/** 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)
{
lua_State *L = globalconf_get_lua_State();
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(!doresize)
{
luaA_object_push(L, c);
if(old_screen != NULL)
luaA_object_push(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);
return;
}
from = old_screen->geometry;
to = c->screen->geometry;
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;
if(!screen_area_in_screen(new_screen, new_geometry))
{
/* If all else fails, force the client to end up on screen. */
new_geometry.x = to.x;
new_geometry.y = to.y;
}
/* move / resize the client */
client_resize(c, new_geometry, false);
/* emit signal */
luaA_object_push(L, c);
if(old_screen != NULL)
luaA_object_push(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)
{
if ((*screen)->viewport)
foreach(output, (*screen)->viewport->outputs)
foreach (randr_output, output->outputs)
if (*randr_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];
lua_State *L = globalconf_get_lua_State();
luaA_object_push(L, globalconf.primary_screen);
luaA_object_emit_signal(L, -1, "primary_changed", 0);
lua_pop(L, 1);
}
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());
else if (A_STREQ(name, "automatic_factory"))
{
lua_pushboolean(L, !globalconf.ignore_screens);
return 1;
}
foreach(screen, globalconf.screens)
if ((*screen)->name && A_STREQ(name, (*screen)->name))
return luaA_object_push(L, *screen);
else if ((*screen)->viewport)
foreach(output, (*screen)->viewport->outputs)
if(A_STREQ(output->name, name))
return luaA_object_push(L, *screen);
luaA_warn(L, "Unknown screen output name: %s", name);
lua_pushnil(L);
return 1;
}
return luaA_object_push(L, luaA_checkscreen(L, 2));
}
static int
luaA_screen_module_newindex(lua_State *L)
{
const char *buf = luaL_checkstring(L, 2);
if (A_STREQ(buf, "automatic_factory"))
{
globalconf.ignore_screens = !luaA_checkboolean(L, 3);
/* It *can* be useful if screens are added/removed later, but generally,
* setting this should be done before screens are added
*/
if (globalconf.ignore_screens && !globalconf.no_auto_screen)
luaA_warn(L,
"Setting automatic_factory only makes sense when AwesomeWM is"
" started with `--screen off`"
);
}
return luaA_default_newindex(L);
}
/** Iterate over screens.
* @usage
* for s in screen do
* print("Oh, wow, we have screen " .. tostring(s))
* end
* @treturn function A lua iterator function.
* @staticfct screen
*/
static int
luaA_screen_module_call(lua_State *L)
{
int idx;
if (lua_isnoneornil(L, 3))
idx = 0;
else
idx = screen_get_index(luaA_checkscreen(L, 3));
if (idx >= 0 && idx < globalconf.screens.len)
/* No +1 needed, index starts at 1, C array at 0 */
luaA_object_push(L, globalconf.screens.tab[idx]);
else
lua_pushnil(L);
return 1;
}
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)
{
luaA_viewport_get_outputs(L, s->viewport);
/* The table of tables we created. */
return 1;
}
static int
luaA_screen_get_managed(lua_State *L, screen_t *s)
{
if (s->lifecycle & SCREEN_LIFECYCLE_LUA)
lua_pushstring(L, "Lua");
else if (s->lifecycle & SCREEN_LIFECYCLE_C)
lua_pushstring(L, "C");
else
lua_pushstring(L, "none");
return 1;
}
static int
luaA_screen_get_workarea(lua_State *L, screen_t *s)
{
luaA_pusharea(L, s->workarea);
return 1;
}
static int
luaA_screen_set_name(lua_State *L, screen_t *s)
{
const char *buf = luaL_checkstring(L, -1);
if (s->name)
free(s->name);
s->name = a_strdup(buf);
return 0;
}
static int
luaA_screen_get_name(lua_State *L, screen_t *s)
{
lua_pushstring(L, s->name ? s->name : "screen");
/* Fallback to "screen1", "screen2", etc if no name is set */
if (!s->name) {
lua_pushinteger(L, screen_get_index(s));
lua_concat(L, 2);
}
return 1;
}
/** Get the number of screens.
*
* @treturn number The screen count.
* @staticfct count
*/
static int
luaA_screen_count(lua_State *L)
{
lua_pushinteger(L, globalconf.screens.len);
return 1;
}
/** Add a fake screen.
*
* To vertically split the first screen in 2 equal parts, use:
*
* local geo = screen[1].geometry
* local new_width = math.ceil(geo.width/2)
* local new_width2 = geo.width - new_width
* screen[1]:fake_resize(geo.x, geo.y, new_width, geo.height)
* screen.fake_add(geo.x + new_width, geo.y, new_width2, geo.height)
*
* Both virtual screens will have their own taglist and wibars.
*
* @tparam integer x X-coordinate for screen.
* @tparam integer y Y-coordinate for screen.
* @tparam integer width Width for screen.
* @tparam integer height Height for screen.
* @treturn screen The new screen.
* @constructorfct fake_add
*/
static int
luaA_screen_fake_add(lua_State *L)
{
int x = luaL_checkinteger(L, 1);
int y = luaL_checkinteger(L, 2);
int width = luaL_checkinteger(L, 3);
int height = luaL_checkinteger(L, 4);
/* If the screen is managed by internal Lua code */
bool managed = false;
/* Allow undocumented arguments for internal use only */
if(lua_istable(L, 5)) {
lua_getfield(L, 5, "_managed");
managed = lua_isboolean(L, 6) && luaA_checkboolean(L, 6);
lua_pop(L, 1);
}
screen_t *s;
s = screen_add(L, &globalconf.screens);
s->lifecycle |= managed ? SCREEN_LIFECYCLE_LUA : SCREEN_LIFECYCLE_USER;
s->geometry.x = x;
s->geometry.y = y;
s->geometry.width = width;
s->geometry.height = height;
s->xid = FAKE_SCREEN_XID;
screen_added(L, s);
luaA_class_emit_signal(L, &screen_class, "list", 0);
luaA_object_push(L, s);
foreach(c, globalconf.clients) {
screen_client_moveto(*c, screen_getbycoord(
(*c)->geometry.x, (*c)->geometry.y), false);
}
return 1;
}
/** Remove a screen.
*
* @DOC_sequences_screen_fake_remove_EXAMPLE@
*
* @method fake_remove
* @noreturn
*/
static int
luaA_screen_fake_remove(lua_State *L)
{
screen_t *s = luaA_checkudata(L, 1, &screen_class);
int idx = screen_get_index(s) - 1;
if (idx < 0)
/* WTF? */
return 0;
if (globalconf.screens.len == 1) {
luaA_warn(L, "Removing last screen through fake_remove(). "
"This is a very, very, very bad idea!");
}
screen_array_take(&globalconf.screens, idx);
luaA_object_push(L, s);
screen_removed(L, -1);
lua_pop(L, 1);
luaA_class_emit_signal(L, &screen_class, "list", 0);
luaA_object_unref(L, s);
s->valid = false;
return 0;
}
/** Resize a screen.
*
* Calling this will resize the screen even if it no longer matches the viewport
* size.
*
* @DOC_sequences_screen_fake_resize_EXAMPLE@
*
* @tparam integer x The new X-coordinate for screen.
* @tparam integer y The new Y-coordinate for screen.
* @tparam integer width The new width for screen.
* @tparam integer height The new height for screen.
* @method fake_resize
* @noreturn
* @see split
* @see geometry
*/
static int
luaA_screen_fake_resize(lua_State *L)
{
screen_t *screen = luaA_checkudata(L, 1, &screen_class);
int x = luaL_checkinteger(L, 2);
int y = luaL_checkinteger(L, 3);
int width = luaL_checkinteger(L, 4);
int height = luaL_checkinteger(L, 5);
area_t old_geometry = screen->geometry;
screen->geometry.x = x;
screen->geometry.y = y;
screen->geometry.width = width;
screen->geometry.height = height;
screen_update_workarea(screen);
luaA_pusharea(L, old_geometry);
luaA_object_emit_signal(L, 1, "property::geometry", 1);
/* Note: calling `screen_client_moveto` from here will create more issues
* than it would fix. Keep in mind that it means `c.screen` will be wrong
* until Lua it `fake_add` fixes it.
*/
return 0;
}
/** Swap a screen with another one in global screen list.
*
* @DOC_sequences_screen_swap_EXAMPLE@
*
* @tparam client s A screen to swap with.
* @method swap
* @noreturn
*/
static int
luaA_screen_swap(lua_State *L)
{
screen_t *s = luaA_checkudata(L, 1, &screen_class);
screen_t *swap = luaA_checkudata(L, 2, &screen_class);
if(s != swap)
{
screen_t **ref_s = NULL, **ref_swap = NULL;
foreach(item, globalconf.screens)
{
if(*item == s)
ref_s = item;
else if(*item == swap)
ref_swap = item;
if(ref_s && ref_swap)
break;
}
if(!ref_s || !ref_swap)
return luaL_error(L, "Invalid call to screen:swap()");
/* swap ! */
*ref_s = swap;
*ref_swap = s;
luaA_class_emit_signal(L, &screen_class, "list", 0);
luaA_object_push(L, swap);
lua_pushboolean(L, true);
luaA_object_emit_signal(L, -4, "swapped", 2);
luaA_object_push(L, swap);
luaA_object_push(L, s);
lua_pushboolean(L, false);
luaA_object_emit_signal(L, -3, "swapped", 2);
}
return 0;
}
void
screen_class_setup(lua_State *L)
{
static const struct luaL_Reg screen_methods[] =
{
LUA_CLASS_METHODS(screen)
{ "count", luaA_screen_count },
{ "_viewports", luaA_viewports },
{ "_scan_quiet", luaA_scan_quiet },
{ "__index", luaA_screen_module_index },
{ "__newindex", luaA_screen_module_newindex },
{ "__call", luaA_screen_module_call },
{ "fake_add", luaA_screen_fake_add },
{ NULL, NULL }
};
static const struct luaL_Reg screen_meta[] =
{
LUA_OBJECT_META(screen)
LUA_CLASS_META
{ "fake_remove", luaA_screen_fake_remove },
{ "fake_resize", luaA_screen_fake_resize },
{ "swap", luaA_screen_swap },
{ NULL, NULL },
};
luaA_class_setup(L, &screen_class, "screen", NULL,
(lua_class_allocator_t) screen_new,
(lua_class_collector_t) screen_wipe,
(lua_class_checker_t) screen_checker,
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, "_managed",
NULL,
(lua_class_propfunc_t) luaA_screen_get_managed,
NULL);
luaA_class_add_property(&screen_class, "workarea",
NULL,
(lua_class_propfunc_t) luaA_screen_get_workarea,
NULL);
luaA_class_add_property(&screen_class, "name",
(lua_class_propfunc_t) luaA_screen_set_name,
(lua_class_propfunc_t) luaA_screen_get_name,
(lua_class_propfunc_t) luaA_screen_set_name);
}
/* @DOC_cobject_COMMON@ */
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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