mutter/src/core/main.c

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* Mutter main() */
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/*
* Copyright (C) 2001 Havoc Pennington
* Copyright (C) 2006 Elijah Newren
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*
* 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, see <http://www.gnu.org/licenses/>.
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*/
/**
* SECTION:main
* @title: Main
* @short_description: Program startup.
*
* Functions which parse the command-line arguments, create the display,
* kick everything off and then close down Mutter when it's time to go.
*
*
*
* Mutter - a boring window manager for the adult in you
*
* Many window managers are like Marshmallow Froot Loops; Mutter
* is like Frosted Flakes: it's still plain old corn, but dusted
* with some sugar.
*
* The best way to get a handle on how the whole system fits together
* is discussed in doc/code-overview.txt; if you're looking for functions
* to investigate, read main(), meta_display_open(), and event_callback().
*/
#define _GNU_SOURCE
#define _XOPEN_SOURCE /* for putenv() and some signal-related functions */
#include <config.h>
#include <meta/main.h>
#include "util-private.h"
#include "display-private.h"
#include <meta/errors.h>
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#include "ui.h"
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#include "session.h"
#include <meta/prefs.h>
#include <meta/compositor.h>
#include "meta-wayland.h"
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#include <glib-object.h>
#include <glib-unix.h>
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#include <gdk/gdkx.h>
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#include <stdlib.h>
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#include <sys/types.h>
#include <sys/wait.h>
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#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <time.h>
#include <unistd.h>
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#include <clutter/clutter.h>
#include <clutter/x11/clutter-x11.h>
#ifdef HAVE_INTROSPECTION
#include <girepository.h>
#endif
/*
* The exit code we'll return to our parent process when we eventually die.
*/
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static MetaExitCode meta_exit_code = META_EXIT_SUCCESS;
/*
* Handle on the main loop, so that we have an easy way of shutting Mutter
* down.
*/
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static GMainLoop *meta_main_loop = NULL;
static void prefs_changed_callback (MetaPreference pref,
gpointer data);
/**
* log_handler:
* @log_domain: the domain the error occurred in (we ignore this)
* @log_level: the log level so that we can filter out less
* important messages
* @message: the message to log
* @user_data: arbitrary data (we ignore this)
*
* Prints log messages. If Mutter was compiled with backtrace support,
* also prints a backtrace (see meta_print_backtrace()).
*/
static void
log_handler (const gchar *log_domain,
GLogLevelFlags log_level,
const gchar *message,
gpointer user_data)
{
meta_warning ("Log level %d: %s\n", log_level, message);
}
/**
* meta_print_compilation_info:
*
* Prints a list of which configure script options were used to
* build this copy of Mutter. This is actually always called
* on startup, but it's all no-op unless we're in verbose mode
* (see meta_set_verbose()).
*/
static void
meta_print_compilation_info (void)
{
#ifdef HAVE_SHAPE
meta_verbose ("Compiled with shape extension\n");
#else
meta_verbose ("Compiled without shape extension\n");
#endif
#ifdef HAVE_XSYNC
meta_verbose ("Compiled with sync extension\n");
#else
meta_verbose ("Compiled without sync extension\n");
#endif
#ifdef HAVE_RANDR
meta_verbose ("Compiled with randr extension\n");
#else
meta_verbose ("Compiled without randr extension\n");
#endif
#ifdef HAVE_STARTUP_NOTIFICATION
meta_verbose ("Compiled with startup notification\n");
#else
meta_verbose ("Compiled without startup notification\n");
#endif
}
/**
* meta_print_self_identity:
*
* Prints the version number, the current timestamp (not the
* build date), the locale, the character encoding, and a list
* of configure script options that were used to build this
* copy of Mutter. This is actually always called
* on startup, but it's all no-op unless we're in verbose mode
* (see meta_set_verbose()).
*/
static void
meta_print_self_identity (void)
{
char buf[256];
GDate d;
const char *charset;
/* Version and current date. */
g_date_clear (&d, 1);
g_date_set_time_t (&d, time (NULL));
g_date_strftime (buf, sizeof (buf), "%x", &d);
meta_verbose ("Mutter version %s running on %s\n",
VERSION, buf);
/* Locale and encoding. */
g_get_charset (&charset);
meta_verbose ("Running in locale \"%s\" with encoding \"%s\"\n",
setlocale (LC_ALL, NULL), charset);
/* Compilation settings. */
meta_print_compilation_info ();
}
/*
* The set of possible options that can be set on Mutter's
* command line.
*/
static gchar *opt_save_file;
static gchar *opt_display_name;
static gchar *opt_client_id;
static gboolean opt_replace_wm;
static gboolean opt_disable_sm;
static gboolean opt_sync;
static gboolean opt_wayland;
static gboolean opt_display_server;
static GOptionEntry meta_options[] = {
{
"sm-disable", 0, 0, G_OPTION_ARG_NONE,
&opt_disable_sm,
N_("Disable connection to session manager"),
NULL
},
{
"replace", 'r', 0, G_OPTION_ARG_NONE,
&opt_replace_wm,
N_("Replace the running window manager"),
NULL
},
{
"sm-client-id", 0, 0, G_OPTION_ARG_STRING,
&opt_client_id,
N_("Specify session management ID"),
"ID"
},
{
"display", 'd', 0, G_OPTION_ARG_STRING,
&opt_display_name, N_("X Display to use"),
"DISPLAY"
},
{
"sm-save-file", 0, 0, G_OPTION_ARG_FILENAME,
&opt_save_file,
N_("Initialize session from savefile"),
"FILE"
},
{
"sync", 0, 0, G_OPTION_ARG_NONE,
&opt_sync,
N_("Make X calls synchronous"),
NULL
},
{
"wayland", 0, 0, G_OPTION_ARG_NONE,
&opt_wayland,
N_("Run as a wayland compositor"),
NULL
},
{
"display-server", 0, 0, G_OPTION_ARG_NONE,
&opt_display_server,
N_("Run as a full display server, rather than nested")
},
{NULL}
};
/**
* meta_get_option_context: (skip)
*
* Returns a #GOptionContext initialized with mutter-related options.
* Parse the command-line args with this before calling meta_init().
*
* Return value: the #GOptionContext
*/
GOptionContext *
meta_get_option_context (void)
{
GOptionContext *ctx;
if (setlocale (LC_ALL, "") == NULL)
meta_warning ("Locale not understood by C library, internationalization will not work\n");
bindtextdomain (GETTEXT_PACKAGE, MUTTER_LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
ctx = g_option_context_new (NULL);
g_option_context_add_main_entries (ctx, meta_options, GETTEXT_PACKAGE);
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return ctx;
}
/* Mutter is responsible for pulling events off the X queue, so Clutter
* doesn't need (and shouldn't) run its normal event source which polls
* the X fd, but we do have to deal with dispatching events that accumulate
* in the clutter queue. This happens, for example, when clutter generate
* enter/leave events on mouse motion - several events are queued in the
* clutter queue but only one dispatched. It could also happen because of
* explicit calls to clutter_event_put(). We add a very simple custom
* event loop source which is simply responsible for pulling events off
* of the queue and dispatching them before we block for new events.
*/
static gboolean
event_prepare (GSource *source,
gint *timeout_)
{
*timeout_ = -1;
return clutter_events_pending ();
}
static gboolean
event_check (GSource *source)
{
return clutter_events_pending ();
}
static gboolean
event_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data)
{
ClutterEvent *event = clutter_event_get ();
if (event)
{
clutter_do_event (event);
clutter_event_free (event);
}
return TRUE;
}
static GSourceFuncs event_funcs = {
event_prepare,
event_check,
event_dispatch
};
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static void
meta_clutter_init (void)
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{
clutter_x11_set_display (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()));
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clutter_x11_disable_event_retrieval ();
if (CLUTTER_INIT_SUCCESS == clutter_init (NULL, NULL))
{
GSource *source = g_source_new (&event_funcs, sizeof (GSource));
g_source_attach (source, NULL);
g_source_unref (source);
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}
else
{
meta_fatal ("Unable to initialize Clutter.\n");
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}
}
/**
* meta_select_display:
*
* Selects which display Mutter should use. It first tries to use
* @display_name as the display. If @display_name is %NULL then
* try to use the environment variable MUTTER_DISPLAY. If that
* also is %NULL, use the default - :0.0
*/
static void
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meta_select_display (char *display_arg)
{
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const char *display_name;
if (display_arg)
display_name = (const char *) display_arg;
else
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display_name = g_getenv ("MUTTER_DISPLAY");
if (display_name)
g_setenv ("DISPLAY", display_name, TRUE);
}
static void
meta_finalize (void)
{
MetaDisplay *display = meta_get_display ();
if (display)
meta_display_close (display,
CurrentTime); /* I doubt correct timestamps matter here */
if (meta_is_wayland_compositor ())
meta_wayland_finalize ();
}
static gboolean
on_sigterm (gpointer user_data)
{
meta_quit (EXIT_SUCCESS);
return G_SOURCE_REMOVE;
}
/**
* meta_init: (skip)
*
* Initialize mutter. Call this after meta_get_option_context() and
* meta_plugin_manager_set_plugin_type(), and before meta_run().
*/
void
meta_init (void)
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{
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struct sigaction act;
sigset_t empty_mask;
ClutterSettings *clutter_settings;
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sigemptyset (&empty_mask);
act.sa_handler = SIG_IGN;
act.sa_mask = empty_mask;
act.sa_flags = 0;
if (sigaction (SIGPIPE, &act, NULL) < 0)
g_printerr ("Failed to register SIGPIPE handler: %s\n",
g_strerror (errno));
#ifdef SIGXFSZ
if (sigaction (SIGXFSZ, &act, NULL) < 0)
g_printerr ("Failed to register SIGXFSZ handler: %s\n",
g_strerror (errno));
#endif
g_unix_signal_add (SIGTERM, on_sigterm, NULL);
if (g_getenv ("MUTTER_VERBOSE"))
meta_set_verbose (TRUE);
if (g_getenv ("MUTTER_DEBUG"))
meta_set_debugging (TRUE);
if (opt_display_server)
clutter_set_windowing_backend (CLUTTER_WINDOWING_EGL);
meta_set_is_wayland_compositor (opt_wayland);
if (g_get_home_dir ())
(Apologies for huge commit; these were done on a transatlantic flight. This is why we need bzr.) 2008-11-22 Thomas Thurman <tthurman@gnome.org> * src/core/all-keybindings.h: "backward", not "backwards" throughout. 2008-11-20 Thomas Thurman <tthurman@gnome.org> * configure.in: turned on -Wall and -Werror in order to trap as many problems as possible. * src/ui/resizepopup.c: added correct #include. * src/ui/theme-viewer.c: initialised variable. * src/core/xprops.c: corrected cast. * src/core/main.c: added warning if chdir() fails. * src/core/schema-bindings.c: checking the return result of fgets(). 2008-11-20 Thomas Thurman <tthurman@gnome.org> Merged screen and window keybinding tables so that we can use just one file for the both. Also incidentally closes #528337. Further efficiencies of scale to come. * src/include/prefs.h: replace META_PREF_*_KEYBINDINGS with META_PREF_KEYBINDINGS * src/core/keybindings.c: replace *_bindings with key_bindings and similar throughout; all window-based functions are now guaranteed to receive a window so don't need to check for themselves (find_handler): moved so it can also be called from rebuild_binding_table * src/core/display-private.h: replace *_bindings with key_bindings * src/core/prefs.c: update_*_binding becomes update_key_binding; (change_notify): tidy up references to "enormous if statement" since it's almost entirely gone now * src/core/all-keybindings.h: new merged version of screen-bindings.h and window-bindings.h. svn path=/trunk/; revision=4022
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if (chdir (g_get_home_dir ()) < 0)
meta_warning ("Could not change to home directory %s.\n",
g_get_home_dir ());
meta_print_self_identity ();
#ifdef HAVE_INTROSPECTION
g_irepository_prepend_search_path (MUTTER_PKGLIBDIR);
#endif
if (meta_is_wayland_compositor ())
{
/* NB: When running as a hybrid wayland compositor we run our own headless X
* server so the user can't control the X display to connect too. */
meta_wayland_init ();
}
else
meta_select_display (opt_display_name);
meta_set_syncing (opt_sync || (g_getenv ("MUTTER_SYNC") != NULL));
if (opt_replace_wm)
meta_set_replace_current_wm (TRUE);
if (opt_save_file && opt_client_id)
meta_fatal ("Can't specify both SM save file and SM client id\n");
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meta_main_loop = g_main_loop_new (NULL, FALSE);
meta_ui_init ();
/* If we are running with wayland then we don't wait until we have
* an X connection before initializing clutter we instead initialize
* it earlier since we need to initialize the GL driver so the driver
* can register any needed wayland extensions. */
if (!meta_is_wayland_compositor ())
{
/*
* Clutter can only be initialized after the UI.
*/
meta_clutter_init ();
}
/*
* XXX: We cannot handle high dpi scaling yet, so fix the scale to 1
* for now.
*/
clutter_settings = clutter_settings_get_default ();
g_object_set (clutter_settings, "window-scaling-factor", 1, NULL);
}
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/**
* meta_register_with_session:
*
* Registers mutter with the session manager. Call this after completing your own
* initialization.
*
* This should be called when the session manager can safely continue to the
* next phase of startup and potentially display windows.
*/
void
meta_register_with_session (void)
{
if (!opt_disable_sm)
{
if (opt_client_id == NULL)
{
const gchar *desktop_autostart_id;
desktop_autostart_id = g_getenv ("DESKTOP_AUTOSTART_ID");
if (desktop_autostart_id != NULL)
opt_client_id = g_strdup (desktop_autostart_id);
}
/* Unset DESKTOP_AUTOSTART_ID in order to avoid child processes to
* use the same client id. */
g_unsetenv ("DESKTOP_AUTOSTART_ID");
meta_session_init (opt_client_id, opt_save_file);
}
/* Free memory possibly allocated by the argument parsing which are
* no longer needed.
*/
g_free (opt_save_file);
g_free (opt_display_name);
g_free (opt_client_id);
}
/**
* meta_activate_session:
*
* Tells mutter to activate the session. When mutter is a
* Wayland compositor, this tells logind to switch over to
* the new session.
*/
gboolean
meta_activate_session (void)
{
if (meta_is_wayland_compositor ())
{
MetaWaylandCompositor *compositor = meta_wayland_compositor_get_default ();
GError *error = NULL;
if (!meta_wayland_compositor_activate_session (compositor, &error))
{
g_warning ("Could not activate session: %s\n", error->message);
g_error_free (error);
return FALSE;
}
}
return TRUE;
}
/**
* meta_run: (skip)
*
* Runs mutter. Call this after completing initialization that doesn't require
* an event loop.
*
* Return value: mutter's exit status
*/
int
meta_run (void)
{
const gchar *log_domains[] = {
NULL, G_LOG_DOMAIN, "Gtk", "Gdk", "GLib",
"Pango", "GLib-GObject", "GThread"
};
guint i;
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/* Load prefs */
meta_prefs_init ();
meta_prefs_add_listener (prefs_changed_callback, NULL);
for (i=0; i<G_N_ELEMENTS(log_domains); i++)
g_log_set_handler (log_domains[i],
G_LOG_LEVEL_MASK | G_LOG_FLAG_FATAL | G_LOG_FLAG_RECURSION,
log_handler, NULL);
if (g_getenv ("MUTTER_G_FATAL_WARNINGS") != NULL)
g_log_set_always_fatal (G_LOG_LEVEL_MASK);
meta_ui_set_current_theme (meta_prefs_get_theme ());
/* Try to find some theme that'll work if the theme preference
* doesn't exist. First try Simple (the default theme) then just
* try anything in the themes directory.
*/
if (!meta_ui_have_a_theme ())
meta_ui_set_current_theme ("Simple");
if (!meta_ui_have_a_theme ())
{
const char *dir_entry = NULL;
GError *err = NULL;
GDir *themes_dir = NULL;
if (!(themes_dir = g_dir_open (MUTTER_DATADIR"/themes", 0, &err)))
{
meta_fatal (_("Failed to scan themes directory: %s\n"), err->message);
g_error_free (err);
}
else
{
while (((dir_entry = g_dir_read_name (themes_dir)) != NULL) &&
(!meta_ui_have_a_theme ()))
{
meta_ui_set_current_theme (dir_entry);
}
g_dir_close (themes_dir);
}
}
if (!meta_ui_have_a_theme ())
Added "above" to the list of flags a frame can have, so that we know when * common.h: Added "above" to the list of flags a frame can have, so that we know when to mark it as always on top. Added six grab ops, one to do and one to undo each of the three new titlebar buttons (shade, above, stick). Added six new button functions, similarly. (#96229) * frame.c (meta_frame_get_flags): If a frame has the WM_STATE_ABOVE X attribute, set META_FRAME_ABOVE in its flags. * frames.c (meta_frames_apply_shapes): Allow variable amounts of rounding. (#113162) * frames.c (show_tip_now, meta_frames_paint_to_drawable, control_rect, get_control): extend handling of existing buttons to the 3*2 new kinds of button. (#96229) * frames.c (meta_frames_button_press_event): translate clicks on the 3*2 new kinds of button to the new grab ops. (#96229) * frames.c (meta_frames_button_release_event): implement the various actions for the 3*2 new kinds of button. (#96229) * frames.c (meta_frames_update_prelit_control, meta_frames_motion_notify_event): extend existing motion notifications for buttons to the 3*2 new kinds of button. (#96229) * frames.c (meta_frames_set_window_background): handle specified background colours and alpha transparency. (#151261) * frames.h (MetaFrameControl): New control types for the 3*2 new kinds of button. (#96229) * iconcache.[ch] (meta_read_icons): use theme's fallback icons if a window has no icon; use metacity's fallback icons only if the theme does not provide any. (#11363) * iconcache.[ch] (meta_invalidate_default_icons (new function)): clear icon cache on windows using default icons, and update them. (#11363) * main.c (main): added \n to error message. * prefs.c (button_function_from_string): extend for 3 new button types. (#96229) * prefs.c (button_opposite_function (new function)): return a button function's inverse (shade -> unshade, etc) (#96229) * prefs.c (update_button_layout): allocate space for a button's inverse, if it has one. (#96229) * theme-parser.c (ParseState): add state for fallback icons (#11363) * theme-parser.c (ParseInfo): add format_version; remove menu_icon_* (#114305) * theme-parser.c (parse_positive_integer): add lookup for integer constants (#331356) * theme-parser.c (parse_rounding (new function)): parse window rounding amount (#113162) * theme-parser.c (parse_alpha): don't set error if the number can't be parsed since it'll already be set; change tolerance in comparison from 1e6 to 1e-6 * theme-parser.c (parse_color (new function)): parse colour, including possible constant lookup. * theme-parser.c (parse_toplevel_element): allow defining of various new kinds of constant; allow hide_buttons (#121639) and more detailed rounding attributes on <frame_geometry> (#113162); allow background and alpha attributes on <frame_style>; (#151261) remove support for <menu_icon> except as stub; (#114305) add support for loading stock images (#113465); add support for <fallback>. (#11363)) * theme-parser.c (parse_draw_op_element): add from and to attribute for arcs. (#121603) * theme-parser.c (parse_style_element): add check for theme version supporting a button function. (#96229) * theme-parser.c (parse_style_set_element): add ability for shaded windows to be resizable (#114304) * theme-parser.c (meta_theme_load): add theme versioning routine. * theme.c ( meta_frame_layout_get_borders): return rectangles for the new 3*2 kinds of button, except where they're inapplicable. (#96229) * theme.c (meta_frame_layout_calc_geometry): don't format buttons on windows with no buttons (#121639); strip the 3*2 new kinds of button correctly (#96229); allow variable amounts of rounding (#113162). * theme.c (meta_frame_style_new): set alpha to 255 by default. (#151261) * theme.c (meta_frame_style_unref): free colour spec if allocated. (#151261) * theme.c (meta_frame_style_validate): it's only an error not to include a button if that button is valid in the current theme. (#96229) * theme.c (button_rect): return rectangles for the new 3*2 kinds of button. (#96229) * theme.c (meta_frame_style_set_unref): free differently resizable shaded styles. (#114304) * theme.c (get_style): look up differently resizable styles for shaded windows. (#114304) * theme.c (free_menu_ops (removed function), get_menu_icon (removed function), meta_theme_draw_menu_icon (removed function), meta_menu_icon_type_from_string (removed function), meta_menu_icon_type_to_string (removed function), meta_theme_free, meta_theme_validate): removed menu icon code. (#114305) * theme.c (meta_theme_load_image): add size_of_theme_icons parameter. (#113465) * theme.c (meta_theme_define_color_constant (new function), meta_theme_lookup_color_constant (new function)): allow definition of colour constants. (#129747) * theme.c (meta_button_type_from_string, meta_button_type_to_string): add the 3*2 new kinds of button. (#96229) * theme.c (meta_theme_earliest_version_with_button (new function)): return the theme version each button was introduced in. (#96229) * theme.h ( MetaFrameLayout): add "hide_buttons" flag (#121639) and corner radiuses. (#113162) * theme.h (MetaFrameGeometry): add rectangles for the 3*2 new buttons. (#96229) * theme.h (MetaButtonType): the 3*2 new buttons. (#96229) * theme.h (MetaFrameStyle): add window_background_color and window_background_alpha so that we can specify background on a <frame_style>. (#151261) * theme.h (MetaFrameStyleSet): shaded_styles gets resize dimension. (#114304) * theme.h (MetaTheme): added format_version, color_constants hash, (#129747) fallback_icon and fallback_mini_icon, (#11363) and removed menu_icons. (#114305) * theme.h (META_THEME_ALLOWS (new macro)): return whether a theme supports a given feature. Also, several macros representing new features in v2. * ui.c (meta_ui_set_current_theme)): also invalidate default icons. (#11363) * window.[ch] (meta_window_update_icon_now)): became non-static. (#11363)
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meta_fatal (_("Could not find a theme! Be sure %s exists and contains the usual themes.\n"),
MUTTER_DATADIR"/themes");
if (!meta_display_open ())
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meta_exit (META_EXIT_ERROR);
g_main_loop_run (meta_main_loop);
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meta_finalize ();
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return meta_exit_code;
}
/**
* meta_quit:
* @code: The success or failure code to return to the calling process.
*
* Stops Mutter. This tells the event loop to stop processing; it is
* rather dangerous to use this because this will leave the user with
* no window manager. We generally do this only if, for example, the
* session manager asks us to; we assume the session manager knows
* what it's talking about.
*/
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void
meta_quit (MetaExitCode code)
{
if (g_main_loop_is_running (meta_main_loop))
{
meta_exit_code = code;
g_main_loop_quit (meta_main_loop);
}
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}
/**
* prefs_changed_callback:
* @pref: Which preference has changed
* @data: Arbitrary data (which we ignore)
*
* Called on pref changes. (One of several functions of its kind and purpose.)
*
* FIXME: Why are these particular prefs handled in main.c and not others?
* Should they be?
*/
static void
prefs_changed_callback (MetaPreference pref,
gpointer data)
{
switch (pref)
{
case META_PREF_THEME:
case META_PREF_DRAGGABLE_BORDER_WIDTH:
meta_ui_set_current_theme (meta_prefs_get_theme ());
meta_display_retheme_all ();
break;
case META_PREF_CURSOR_THEME:
case META_PREF_CURSOR_SIZE:
meta_display_set_cursor_theme (meta_prefs_get_cursor_theme (),
meta_prefs_get_cursor_size ());
break;
default:
/* handled elsewhere or otherwise */
break;
}
}