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uwm.c
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uwm.c
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///
/// @file uwm.c @brief µwm µ window manager main file
///
/// Copyright (c) 2009 - 2011, 2021 by Lutz Sammer. All Rights Reserved.
///
/// Contributor(s):
/// based on jwm from Joe Wingbermuehle
///
/// License: AGPLv3
///
/// This program is free software: you can redistribute it and/or modify
/// it under the terms of the GNU Affero General Public License as
/// published by the Free Software Foundation, either version 3 of the
/// License.
///
/// 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 Affero General Public License for more details.
///
/// $Id$
//////////////////////////////////////////////////////////////////////////////
/**
** @page oldmainpage
**
** @section about
**
** µwm is a lightweight stacking window manager for the X11 Window System
** and is written in C and uses only libxcb at a minimum. It has builtin
** menus/panels/buttons and other plugins.
**
** @section overview
**
** - stacking window manager
** - written in C (with many comments)
** - less dependencies (only XCB and X11 required)
** - doesn't use/need GNU autoconfigure and other auto-tools
** - executable less than 200k
** - less than 20k Source Lines of Code
** - low memory footprint during runtime ~ 1800k RES
** - low X11 resource usage ~ 200k (without desktop backgrounds)
** - low CPU usage
**
** @section features
**
** - configurable and themeable
** - no XML config file
** - builtin menu(s)
** - builtin panel(s) (other names are slit/bar/dock) with:
** - button
** - clock
** - netload
** - pager
** - swallow (dock)
** - systray
** - task-list
** - builtin tooltips
** - builtin background setter
** - composite support with xcompmgr (sample X compositing manager)
** - multiple desktops
** - multiple screen (xinerama)
** - 64-bit and 32-bit clean
** - little-endian and big-endian clean
** - compatible with uclibc and libc6
** - compatible with GCC 4.5.3, Clang 2.9 and ekopath 4.0.11
** - many features can be compile time enabled / disabled
**
** see <a href="modules.html">list of µwm modules</a>.
*/
///
/// @defgroup uwm The uwm main module.
///
/// This module contains main, init, config and exit functions.
///
///< @{
#define _GNU_SOURCE 1 ///< fix stpcpy strchrnul
#include <xcb/xcb.h>
#include "uwm.h"
#include <sys/wait.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <xcb/xcb_atom.h>
#include <xcb/xcb_aux.h>
#include <xcb/xcb_icccm.h>
#ifdef USE_SHAPE
#include <xcb/shape.h>
#endif
#ifdef USE_RENDER
#include <xcb/xcb_renderutil.h>
#include <xcb/render.h>
#endif
#include <xcb/bigreq.h>
#include "queue.h"
#include "core-array/core-array.h"
#include "core-rc/core-rc.h"
#include "misc.h"
#include "event.h"
#include "property.h"
#include "command.h"
#include "draw.h"
#include "image.h"
#include "screen.h"
#include "pointer.h"
#include "client.h"
#include "border.h"
#include "moveresize.h"
#include "keyboard.h"
#include "hints.h"
#include "tooltip.h"
#include "icon.h"
#include "menu.h"
#include "background.h"
#include "desktop.h"
#include "rule.h"
#include "panel.h"
#include "plugin/button.h"
#include "plugin/clock.h"
#include "plugin/netload.h"
#include "plugin/pager.h"
#include "plugin/swallow.h"
#include "plugin/systray.h"
#include "plugin/task.h"
#include "dia.h"
#include "td.h"
// ------------------------------------------------------------------------ //
// Variables
// ------------------------------------------------------------------------ //
#ifdef DEBUG
int DebugLevel = 3; ///< debug level
#endif
const char *DisplayString; ///< X11 display string
xcb_connection_t *Connection; ///< connection to X11 server
xcb_screen_t *XcbScreen; ///< our screen
// Prepared
xcb_gcontext_t RootGC; ///< root graphic context
xcb_visualtype_t *RootVisualType; ///< root visual type
#ifdef USE_SHAPE
int HaveShape; ///< shape extension found
int ShapeEvent; ///< first shape event code
#endif
#ifdef USE_RENDER
int HaveRender; ///< xrender extension found
#endif
char KeepRunning; ///< keep running
volatile char KeepLooping; ///< keep looping
//static char Initializing; ///< init state
// ------------------------------------------------------------------------ //
/**
** Redraw borders on current desktop.
**
** This should be done after loading clients since stacking order
** may cause borders on current desktop to become visible after moving
** clients to their assigned desktops.
*/
static void RedrawCurrentDesktop(void)
{
Client *client;
int layer;
for (layer = LAYER_BOTTOM; layer < LAYER_MAX; layer++) {
TAILQ_FOREACH(client, &ClientLayers[layer], LayerQueue) {
// draw only clients on current desktop which are visible
if (!(client->State & (WM_STATE_HIDDEN | WM_STATE_MINIMIZED))) {
BorderDraw(client, NULL);
}
}
}
}
/**
** Initialize modules.
*/
static void ModulesInit(void)
{
xcb_get_property_cookie_t net_current_desktop_cookie;
KeepLooping = 1;
// Initializing = 1;
CommandInit(); // must be first (runs programs)
KeepRunning = 0; // needed by command init for restart
AtomPreInit(); // send requests early
PointerPreInit();
ClientPreInit();
AtomInit();
net_current_desktop_cookie = HintNetCurrentDesktopRequest();
BackgroundPreInit();
ColorInit();
IconInit();
BackgroundInit(); // needs atom + color + icon
FontInit();
BorderInit();
ScreenInit();
PointerInit();
KeyboardInit();
DesktopInit();
DialogInit();
RuleInit();
//Hints();
//StatusInit();
OutlineInit();
PlacementInit();
TooltipInit();
RootMenuInit();
ClockInit();
PanelButtonInit();
PagerInit(); // need client
TaskInit(); // need client
SystrayInit();
NetloadInit();
PanelInit();
ClientInit(); // need task, pager
SwallowInit(); // needs client
// Initializing = 0;
PointerSetDefaultCursor(XcbScreen->root);
DesktopCurrent = -1; // force update
HintGetNetCurrentDesktop(net_current_desktop_cookie);
// allow clients to do their thing
xcb_aux_sync(Connection);
xcb_ungrab_server(Connection);
// draw all panels
PanelsDraw();
// draw border of all clients on current desktop
RedrawCurrentDesktop();
}
/**
** Cleanup modules.
*/
static void ModulesExit(void)
{
BorderExit();
ClientExit();
DesktopExit();
DialogExit();
FontExit();
RuleExit();
// Hints();
OutlineExit();
//StatusExit();
PlacementExit();
TooltipExit();
PanelExit(); // panel exit befor plugin exit
NetloadExit();
SystrayExit();
SwallowExit();
TaskExit();
PagerExit();
PanelButtonExit();
ClockExit();
RootMenuExit();
IconExit(); // menu/panel frees icons self
ScreenExit();
BackgroundExit();
KeyboardExit();
PointerExit();
AtomExit();
ColorExit();
CommandExit(); // must be last (runs programs)
}
// ------------------------------------------------------------------------ //
/**
** Open connection to X server.
*/
static void ConnectionOpen(void)
{
xcb_connection_t *connection;
int screen_nr;
const xcb_setup_t *setup;
xcb_screen_iterator_t iter;
int i;
xcb_screen_t *screen;
uint32_t mask;
uint32_t values[3];
// open connection to X server.
// use DISPLAY environment variable as default display name
connection = xcb_connect(DisplayString, &screen_nr);
if (!connection || xcb_connection_has_error(connection)) {
FatalError("Can't connect to X11 server on %s\n",
DisplayString ? DisplayString : getenv("DISPLAY"));
}
Debug(3, "Use screen %d\n", screen_nr);
// get screen whose number is screen_nr
setup = xcb_get_setup(connection);
iter = xcb_setup_roots_iterator(setup);
for (i = 0; i < screen_nr; ++i) {
xcb_screen_next(&iter);
}
screen = iter.data;
Connection = connection;
XcbScreen = screen;
// emulate DefaultGC
RootGC = xcb_generate_id(connection);
mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_GRAPHICS_EXPOSURES;
values[0] = screen->white_pixel;
values[1] = screen->black_pixel;
values[2] = 0;
xcb_create_gc(connection, RootGC, XcbScreen->root, mask, values);
RootVisualType = xcb_aux_find_visual_by_id(screen, screen->root_visual);
#ifdef USE_COLORMAP
colormapCount =
MaxCmapsOfScreen(ScreenOfConnection(Connection, rootScreen));
#endif
}
/**
** Close X server connection.
*/
static void ConnectionClose(void)
{
xcb_flush(Connection); // send out remaining commands
xcb_disconnect(Connection);
Connection = 0;
}
/**
** Signal handler.
**
** handle SIGTERM, SIGINT, SIGHUP.
**
** @param signum unused signal number
*/
static void SignalHandler(int __attribute__((unused)) signum)
{
signal(SIGTERM, SignalHandler);
signal(SIGINT, SignalHandler);
signal(SIGHUP, SignalHandler);
KeepLooping = 0;
}
/**
** Initialize X server connection.
*/
static void ConnectionInit(void)
{
const xcb_query_extension_reply_t *query_extension_reply;
uint32_t value[1];
ConnectionOpen();
// grab server to delay any events until we enter event-loop
xcb_grab_server(Connection);
// prefetch extensions
#ifdef USE_SHAPE
xcb_prefetch_extension_data(Connection, &xcb_shape_id);
#endif
#ifdef USE_RENDER
xcb_prefetch_extension_data(Connection, &xcb_render_id);
#endif
xcb_prefetch_extension_data(Connection, &xcb_big_requests_id);
// Set events we want for root window.
// Note that asking for SUBSTRUCTURE_REDIRECT will fail
// if another window manager is already running.
value[0] =
XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_KEY_RELEASE |
XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE |
XCB_EVENT_MASK_ENTER_WINDOW | XCB_EVENT_MASK_POINTER_MOTION |
XCB_EVENT_MASK_POINTER_MOTION_HINT | XCB_EVENT_MASK_STRUCTURE_NOTIFY |
XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT | XCB_EVENT_MASK_PROPERTY_CHANGE |
XCB_EVENT_MASK_COLOR_MAP_CHANGE;
xcb_change_window_attributes(Connection, XcbScreen->root,
XCB_CW_EVENT_MASK, value);
signal(SIGTERM, SignalHandler);
signal(SIGINT, SignalHandler);
signal(SIGHUP, SignalHandler);
#ifdef USE_SHAPE
query_extension_reply = xcb_get_extension_data(Connection, &xcb_shape_id);
if ((HaveShape = query_extension_reply->present)) {
Debug(2, "shape extension enabled\n");
// Shape notify 0 = window has changed its shape
ShapeEvent = query_extension_reply->first_event;
Debug(4, "shape event code %d\n", ShapeEvent);
} else {
Debug(2, "shape extension disabled\n");
}
#endif
#ifdef USE_RENDER
query_extension_reply = xcb_get_extension_data(Connection, &xcb_render_id);
if ((HaveRender = query_extension_reply->present)) {
Debug(2, "render extension enabled\n");
if (XcbScreen->root_depth < 24) {
Warning("root depth is %d, icon alpha channel disabled\n",
XcbScreen->root_depth);
HaveRender = 0;
}
} else {
Debug(2, "render extension disabled\n");
}
#endif
// Setup event handlers
EventInit();
// Setup property handlers
PropertyInit();
xcb_prefetch_maximum_request_length(Connection);
}
/**
** Exit X server connection
*/
static void ConnectionExit(void)
{
EventExit();
PropertyExit();
#ifdef USE_RENDER
xcb_render_util_disconnect(Connection);
#endif
ConnectionClose();
}
// ------------------------------------------------------------------------ //
// Configuration
// ------------------------------------------------------------------------ //
#ifdef USE_RC // {
#if defined(USE_RULE) || defined(USE_PANEL) // {
/**
** Parse gravity.
**
** @param keyword gravity type (static, north, ...)
** @param error error info for failure message
**
** @returns gravity for given keyword.
*/
Gravity ParseGravity(const char *keyword, const char *error)
{
if (!strcasecmp(keyword, "static")) {
return GRAVITY_STATIC;
} else if (!strcasecmp(keyword, "north")) {
return GRAVITY_NORTH;
} else if (!strcasecmp(keyword, "south")) {
return GRAVITY_SOUTH;
} else if (!strcasecmp(keyword, "west")) {
return GRAVITY_WEST;
} else if (!strcasecmp(keyword, "east")) {
return GRAVITY_EAST;
} else if (!strcasecmp(keyword, "center")) {
return GRAVITY_CENTER;
} else if (!strcasecmp(keyword, "north-west")) {
return GRAVITY_NORTH_WEST;
} else if (!strcasecmp(keyword, "north-east")) {
return GRAVITY_NORTH_EAST;
} else if (!strcasecmp(keyword, "south-west")) {
return GRAVITY_SOUTH_WEST;
} else if (!strcasecmp(keyword, "south-east")) {
return GRAVITY_SOUTH_EAST;
} else {
Warning("invalid %s gravity: \"%s\"\n", error, keyword);
return -1;
}
}
#endif // } defined(USE_RULE) || defined(USE_PANEL)
/**
** Get global configuration.
**
** @param config global config dictionary
*/
static void GlobalConfig(const Config * config)
{
const char *sval;
ssize_t ival;
FocusModus = FOCUS_SLOPPY;
if (ConfigStringsGetString(ConfigDict(config), &sval, "focus-model", NULL)) {
if (!strcasecmp(sval, "sloppy")) {
// default: FocusModus = FOCUS_SLOPPY;
} else if (!strcasecmp(sval, "click")) {
FocusModus = FOCUS_CLICK;
} else {
Warning("invalid focus model: '%s'\n", sval);
}
}
// DoubleClick
DoubleClickDelta = DOUBLE_CLICK_DEFAULT_DELTA;
if (ConfigStringsGetInteger(ConfigDict(config), &ival, "double-click",
"delta", NULL)) {
if (DOUBLE_CLICK_MINIMAL_DELTA <= ival
&& ival <= DOUBLE_CLICK_MAXIMAL_DELTA) {
DoubleClickDelta = ival;
} else {
Warning("double-click delta %zd out of range\n", ival);
}
}
DoubleClickSpeed = DOUBLE_CLICK_DEFAULT_SPEED;
if (ConfigStringsGetInteger(ConfigDict(config), &ival, "double-click",
"speed", NULL)) {
if (DOUBLE_CLICK_MINIMAL_SPEED <= ival
&& ival <= DOUBLE_CLICK_MAXIMAL_SPEED) {
DoubleClickSpeed = ival;
} else {
Warning("double-click speed %zd out of range\n", ival);
}
}
}
/**
** Parse configuration file.
**
** @param filename config file name
*/
static void ParseConfig(const char *filename)
{
char *name;
Config *config;
//
// build our constants passed to core-rc
//
config = ConfigNewConfig(NULL);
ConfigDefine(config, ConfigNewString("UWM-VERSION"),
ConfigNewString(VERSION));
name = ExpandPath(filename);
config = ConfigReadFile2(config, name);
free(name);
if (!config) {
Error("error parsing user config file '%s'\n", filename);
config = ConfigReadFile2(config, SYSTEM_CONFIG);
if (!config) {
Error("error parsing system config file '%s'\n", SYSTEM_CONFIG);
// return;
}
Debug(2, "Config '%s' loaded\n", SYSTEM_CONFIG);
} else {
Debug(2, "Config '%s' loaded\n", filename);
}
GlobalConfig(config);
CommandConfig(config);
ColorConfig(config);
FontConfig(config);
TooltipConfig(config);
DesktopConfig(config);
BackgroundConfig(config);
RuleConfig(config);
BorderConfig(config);
StatusConfig(config);
OutlineConfig(config);
SnapConfig(config);
KeyboardConfig(config);
IconConfig(config);
MenuConfig(config);
RootMenuConfig(config);
//WindowMenuConfig(config);
PanelConfig(config);
DiaConfig(config);
ConfigFreeMem(config);
}
#else // }{ USE_RC
/// Dummy for Parse configuration file.
#define ParseConfig(filename)
#endif // } !USE_RC
// ------------------------------------------------------------------------ //
/**
** Send message to root window.
**
** @param string Message string
**
** @note when this function is called, no module is available
*/
static void SendClientMessage(const char *string)
{
xcb_client_message_event_t event;
xcb_intern_atom_cookie_t cookies;
xcb_intern_atom_reply_t *reply;
ConnectionOpen();
cookies = xcb_intern_atom_unchecked(Connection, 0, strlen(string), string);
memset(&event, 0, sizeof(event));
event.response_type = XCB_CLIENT_MESSAGE;
event.format = 32;
event.window = XcbScreen->root;
if ((reply = xcb_intern_atom_reply(Connection, cookies, NULL))) {
event.type = reply->atom;
free(reply);
xcb_send_event(Connection, XCB_SEND_EVENT_DEST_POINTER_WINDOW,
XcbScreen->root, XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT,
(void *)&event);
} else {
FatalError("Can't send client message '%s'\n", string);
}
ConnectionClose();
}
/**
** Send _UWM_RESTART to root window.
*/
static void SendRestart(void)
{
SendClientMessage("_UWM_RESTART");
}
/**
** Send _UWM_EXIT to root window.
*/
static void SendExit(void)
{
SendClientMessage("_UWM_EXIT");
}
// ------------------------------------------------------------------------ //
/**
** Print version.
*/
static void PrintVersion(void)
{
printf("µwm Version " VERSION
#ifdef GIT_REV
"(GIT-" GIT_REV ")"
#endif
", (c) 2009 - 2011, 2021 by Lutz Sammer\n"
"\tLicense AGPLv3: GNU Affero General Public License version 3\n");
}
/**
** Print usage.
*/
static void PrintUsage(void)
{
printf("Usage: µwm [-?|-h] [-c config] [-d X] [-e] [-p] [-r] [-v]\n"
"\t-c config\tload configuration from config\n"
"\t-d X\tset the X display to use\n"
"\t-e\texit µWM (send _UWM_EXIT to the root window)\n"
"\t-r\trestart µWM (send _UWM_RESTART to the root window)\n"
"\t-p\tparse the configuration file and exit\n"
#ifdef DEBUG
"\t-D\tincrease debug level (more and verbose output)\n"
#endif
"\t-? -h\tdisplay this message\n" "\t-v\tdisplay version information\n"
"Only idiots print usage on stderr!\n");
}
/**
** Main entry point.
**
** @param argc number of arguments
** @param argv arguments vector
**
** @returns -1 on failures, 0 clean exit.
*/
int main(int argc, char *const argv[])
{
const char *config_filename;
#ifdef XDG_CONFIG_HOME
const char *xdg_config_home;
const char *config_dir;
char *config_pathname;
//
// Parse config dir.
//
xdg_config_home = getenv("XDG_CONFIG_HOME");
if (xdg_config_home) {
config_dir = xdg_config_home;
} else {
config_dir = "~/.config";
}
config_pathname = malloc(strlen(config_dir) + strlen(DEFAULT_CONFIG) + 2);
strcpy(config_pathname, config_dir);
config_pathname[strlen(config_dir)] = '/';
strcpy(config_pathname + strlen(config_dir) + 1, DEFAULT_CONFIG);
config_filename = config_pathname;
#else
config_filename = DEFAULT_CONFIG;
#endif
//
// Parse command line arguments
//
for (;;) {
switch (getopt(argc, argv, "hv?-c:d:eprD")) {
case 'c': // config file
config_filename = optarg;
continue;
case 'd': // x11 display
DisplayString = optarg;
continue;
case 'e': // send exit
SendExit();
return 0;
case 'r': // send restart
SendRestart();
return 0;
case 'p': // parse configuration only
ConnectionOpen();
ParseConfig(config_filename);
ConnectionClose();
return 0;
case 'D': // increase debug level
#ifdef DEBUG
++DebugLevel;
continue;
#else
fprintf(stderr, "\nCompiled without debug support\n");
return -1;
#endif
case EOF:
break;
case 'v': // print version
PrintVersion();
return 0;
case '?':
case 'h': // help usage
PrintVersion();
PrintUsage();
return 0;
case '-':
PrintVersion();
PrintUsage();
fprintf(stderr, "\nWe need no long options\n");
return -1;
case ':':
PrintVersion();
fprintf(stderr, "Missing argument for option '%c'\n", optopt);
return -1;
default:
PrintVersion();
fprintf(stderr, "Unkown option '%c'\n", optopt);
return -1;
}
break;
}
if (optind < argc) {
PrintVersion();
while (optind < argc) {
fprintf(stderr, "Unhandled argument '%s'\n", argv[optind++]);
}
return -1;
}
//
// main loop
//
ConnectionInit();
do {
// parse configuration file
ParseConfig(config_filename);
// initialize modules
ModulesInit();
// main event loop
EventLoop();
// restore start state
ModulesExit();
} while (KeepRunning);
ConnectionExit();
//
// If we have command to execute on shutdown, run it now
//
if (ExitCommand) {
CommandPrepareEnv();
execl(Shell, Shell, "-c", ExitCommand, NULL);
Warning("exec failed: (%s) %s\n", Shell, ExitCommand);
return -1;
}
return 0;
}
/// @}