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awesome/systray.c
Emmanuel Lepage Vallee 9991f9ccc8 geometry: Use the relevant rounding functions instead of integers 
In the case where one want to put the cursor at the middle of the
workarea, it is logic to do:

   x=screen.workarea.x+screen.workasrea.width/2

However, this can cause floating points. This commit move the
burden back to the C-API so the Lua placement code doesn't have
to add a large number of rounding methods. Given 1 type of rounding
cover a vast majority of use cases for each types of coordinates,
the C-API can take care of it in peace. For the other corner cases,
it is still possible for the Lua code to do the rounding there, but
no longer necessary. The convenstions are:

 'x' and 'y': use round (move to the closest point)

 'width' and 'height': use ceil (to avoid involontary truncating)
2016-04-18 04:20:22 -04:00

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/*
* systray.c - systray handling
*
* Copyright © 2008-2009 Julien Danjou <julien@danjou.info>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include "systray.h"
#include "common/atoms.h"
#include "common/xutil.h"
#include "objects/drawin.h"
#include "xwindow.h"
#include "globalconf.h"
#include <xcb/xcb.h>
#include <xcb/xcb_icccm.h>
#include <xcb/xcb_atom.h>
#define SYSTEM_TRAY_REQUEST_DOCK 0 /* Begin icon docking */
/** Initialize systray information in X.
*/
void
systray_init(void)
{
xcb_intern_atom_cookie_t atom_systray_q;
xcb_intern_atom_reply_t *atom_systray_r;
char *atom_name;
xcb_screen_t *xscreen = globalconf.screen;
globalconf.systray.window = xcb_generate_id(globalconf.connection);
globalconf.systray.background_pixel = xscreen->black_pixel;
xcb_create_window(globalconf.connection, xscreen->root_depth,
globalconf.systray.window,
xscreen->root,
-1, -1, 1, 1, 0,
XCB_COPY_FROM_PARENT, xscreen->root_visual,
XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK, (const uint32_t [])
{ xscreen->black_pixel, XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT });
xwindow_set_class_instance(globalconf.systray.window);
xwindow_set_name_static(globalconf.systray.window, "Awesome systray window");
atom_name = xcb_atom_name_by_screen("_NET_SYSTEM_TRAY", globalconf.default_screen);
if(!atom_name)
fatal("error getting systray atom name");
atom_systray_q = xcb_intern_atom_unchecked(globalconf.connection, false,
a_strlen(atom_name), atom_name);
p_delete(&atom_name);
atom_systray_r = xcb_intern_atom_reply(globalconf.connection, atom_systray_q, NULL);
if(!atom_systray_r)
fatal("error getting systray atom");
globalconf.systray.atom = atom_systray_r->atom;
p_delete(&atom_systray_r);
}
/** Register systray in X.
*/
static void
systray_register(void)
{
xcb_client_message_event_t ev;
xcb_screen_t *xscreen = globalconf.screen;
if(globalconf.systray.registered)
return;
globalconf.systray.registered = true;
/* Fill event */
p_clear(&ev, 1);
ev.response_type = XCB_CLIENT_MESSAGE;
ev.window = xscreen->root;
ev.format = 32;
ev.type = MANAGER;
ev.data.data32[0] = XCB_CURRENT_TIME;
ev.data.data32[1] = globalconf.systray.atom;
ev.data.data32[2] = globalconf.systray.window;
ev.data.data32[3] = ev.data.data32[4] = 0;
xcb_set_selection_owner(globalconf.connection,
globalconf.systray.window,
globalconf.systray.atom,
XCB_CURRENT_TIME);
xcb_send_event(globalconf.connection, false, xscreen->root, 0xFFFFFF, (char *) &ev);
}
/** Remove systray information in X.
*/
void
systray_cleanup(void)
{
if(!globalconf.systray.registered)
return;
globalconf.systray.registered = false;
xcb_set_selection_owner(globalconf.connection,
XCB_NONE,
globalconf.systray.atom,
XCB_CURRENT_TIME);
xcb_unmap_window(globalconf.connection,
globalconf.systray.window);
}
/** Handle a systray request.
* \param embed_win The window to embed.
* \param info The embedding info
* \return 0 on no error.
*/
int
systray_request_handle(xcb_window_t embed_win, xembed_info_t *info)
{
xembed_window_t em;
xcb_get_property_cookie_t em_cookie;
const uint32_t select_input_val[] =
{
XCB_EVENT_MASK_STRUCTURE_NOTIFY
| XCB_EVENT_MASK_PROPERTY_CHANGE
| XCB_EVENT_MASK_ENTER_WINDOW
};
/* check if not already trayed */
if(xembed_getbywin(&globalconf.embedded, embed_win))
return -1;
p_clear(&em_cookie, 1);
if(!info)
em_cookie = xembed_info_get_unchecked(globalconf.connection, embed_win);
xcb_change_window_attributes(globalconf.connection, embed_win, XCB_CW_EVENT_MASK,
select_input_val);
/* we grab the window, but also make sure it's automatically reparented back
* to the root window if we should die.
*/
xcb_change_save_set(globalconf.connection, XCB_SET_MODE_INSERT, embed_win);
xcb_reparent_window(globalconf.connection, embed_win,
globalconf.systray.window,
0, 0);
em.win = embed_win;
if(info)
em.info = *info;
else
xembed_info_get_reply(globalconf.connection, em_cookie, &em.info);
xembed_embedded_notify(globalconf.connection, em.win,
globalconf.systray.window,
MIN(XEMBED_VERSION, em.info.version));
xembed_window_array_append(&globalconf.embedded, em);
luaA_systray_invalidate();
return 0;
}
/** Handle systray message.
* \param ev The event.
* \return 0 on no error.
*/
int
systray_process_client_message(xcb_client_message_event_t *ev)
{
int ret = 0;
xcb_get_geometry_cookie_t geom_c;
xcb_get_geometry_reply_t *geom_r;
switch(ev->data.data32[1])
{
case SYSTEM_TRAY_REQUEST_DOCK:
geom_c = xcb_get_geometry_unchecked(globalconf.connection, ev->window);
if(!(geom_r = xcb_get_geometry_reply(globalconf.connection, geom_c, NULL)))
return -1;
if(globalconf.screen->root == geom_r->root)
ret = systray_request_handle(ev->data.data32[2], NULL);
p_delete(&geom_r);
break;
}
return ret;
}
/** Check if a window is a KDE tray.
* \param w The window to check.
* \return True if it is, false otherwise.
*/
bool
systray_iskdedockapp(xcb_window_t w)
{
xcb_get_property_cookie_t kde_check_q;
xcb_get_property_reply_t *kde_check;
bool ret;
/* Check if that is a KDE tray because it does not respect fdo standards,
* thanks KDE. */
kde_check_q = xcb_get_property_unchecked(globalconf.connection, false, w,
_KDE_NET_WM_SYSTEM_TRAY_WINDOW_FOR,
XCB_ATOM_WINDOW, 0, 1);
kde_check = xcb_get_property_reply(globalconf.connection, kde_check_q, NULL);
/* it's a KDE systray ?*/
ret = (kde_check && kde_check->value_len);
p_delete(&kde_check);
return ret;
}
/** Handle xembed client message.
* \param ev The event.
* \return 0 on no error.
*/
int
xembed_process_client_message(xcb_client_message_event_t *ev)
{
switch(ev->data.data32[1])
{
case XEMBED_REQUEST_FOCUS:
xembed_focus_in(globalconf.connection, ev->window, XEMBED_FOCUS_CURRENT);
break;
}
return 0;
}
/** Inform lua that the systray needs to be updated.
*/
void
luaA_systray_invalidate(void)
{
lua_State *L = globalconf_get_lua_State();
signal_object_emit(L, &global_signals, "systray::update", 0);
/* Unmap now if the systray became empty */
if(globalconf.embedded.len == 0)
xcb_unmap_window(globalconf.connection, globalconf.systray.window);
}
static void
systray_update(int base_size, bool horizontal, bool reverse, int spacing, bool force_redraw)
{
if(base_size <= 0)
return;
/* Give the systray window the correct size */
uint32_t config_vals[4] = { base_size, base_size, 0, 0 };
if(horizontal)
config_vals[0] = base_size * globalconf.embedded.len + spacing * (globalconf.embedded.len - 1);
else
config_vals[1] = base_size * globalconf.embedded.len + spacing * (globalconf.embedded.len - 1);
xcb_configure_window(globalconf.connection,
globalconf.systray.window,
XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
config_vals);
/* Now resize each embedded window */
config_vals[0] = config_vals[1] = 0;
config_vals[2] = config_vals[3] = base_size;
for(int i = 0; i < globalconf.embedded.len; i++)
{
xembed_window_t *em;
if(reverse)
em = &globalconf.embedded.tab[(globalconf.embedded.len - i - 1)];
else
em = &globalconf.embedded.tab[i];
xcb_configure_window(globalconf.connection, em->win,
XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
config_vals);
xcb_map_window(globalconf.connection, em->win);
if (force_redraw)
xcb_clear_area(globalconf.connection, 1, em->win, 0, 0, 0, 0);
if(horizontal)
config_vals[0] += base_size + spacing;
else
config_vals[1] += base_size + spacing;
}
}
/** Update the systray
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam The drawin to display the systray in.
* \lparam x X position for the systray.
* \lparam y Y position for the systray.
* \lparam base_size The size (width and height) each systray item gets.
* \lparam horiz If true, the systray is horizontal, else vertical.
* \lparam bg Color of the systray background.
* \lparam revers If true, the systray icon order will be reversed, else default.
* \lparam spacing The size of the spacing between icons.
*/
int
luaA_systray(lua_State *L)
{
systray_register();
if(lua_gettop(L) != 0)
{
size_t bg_len;
drawin_t *w = luaA_checkudata(L, 1, &drawin_class);
int x = round(luaA_checknumber_range(L, 2, MIN_X11_COORDINATE, MAX_X11_COORDINATE));
int y = round(luaA_checknumber_range(L, 3, MIN_X11_COORDINATE, MAX_X11_COORDINATE));
int base_size = ceil(luaA_checknumber_range(L, 4, MIN_X11_SIZE, MAX_X11_SIZE));
bool horiz = lua_toboolean(L, 5);
const char *bg = luaL_checklstring(L, 6, &bg_len);
bool revers = lua_toboolean(L, 7);
int spacing = ceil(luaA_checknumber_range(L, 8, 0, MAX_X11_COORDINATE));
color_t bg_color;
bool force_redraw = false;
if(color_init_reply(color_init_unchecked(&bg_color, bg, bg_len))
&& globalconf.systray.background_pixel != bg_color.pixel)
{
uint32_t config_back[] = { bg_color.pixel };
globalconf.systray.background_pixel = bg_color.pixel;
xcb_change_window_attributes(globalconf.connection,
globalconf.systray.window,
XCB_CW_BACK_PIXEL, config_back);
xcb_clear_area(globalconf.connection, 1, globalconf.systray.window, 0, 0, 0, 0);
force_redraw = true;
}
if(globalconf.systray.parent != w)
xcb_reparent_window(globalconf.connection,
globalconf.systray.window,
w->window,
x, y);
else
{
uint32_t config_vals[2] = { x, y };
xcb_configure_window(globalconf.connection,
globalconf.systray.window,
XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y,
config_vals);
}
globalconf.systray.parent = w;
if(globalconf.embedded.len != 0)
{
systray_update(base_size, horiz, revers, spacing, force_redraw);
xcb_map_window(globalconf.connection,
globalconf.systray.window);
}
}
lua_pushinteger(L, globalconf.embedded.len);
luaA_object_push(L, globalconf.systray.parent);
return 2;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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