rofi/source/rofi.c

/*
 * rofi
 *
 * MIT/X11 License
 * Copyright © 2012 Sean Pringle <sean.pringle@gmail.com>
 * Copyright © 2013-2017 Qball Cow <qball@gmpclient.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#define G_LOG_DOMAIN    "Rofi"

#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <errno.h>
#include <time.h>
#include <locale.h>
#include <gmodule.h>
#include <xcb/xcb.h>
#include <sys/types.h>

#include <glib-unix.h>

#include <libgwater-xcb.h>

#include "rofi.h"
#include "display.h"

#include "settings.h"
#include "mode.h"
#include "helper.h"
#include "widgets/textbox.h"
#include "xrmoptions.h"
#include "dialogs/dialogs.h"

#include "view.h"
#include "view-internal.h"

#include "theme.h"

#include "timings.h"

#include "default-theme.h"

// Plugin abi version.
// TODO: move this check to mode.c
#include "mode-private.h"

// Pidfile.
char       *pidfile   = NULL;
const char *cache_dir = NULL;

/** List of error messages.*/
GList *list_of_error_msgs = NULL;

static void rofi_collect_modi_destroy ( void );
void rofi_add_error_message ( GString *str )
{
    list_of_error_msgs = g_list_append ( list_of_error_msgs, str );
}

/** Path to the configuration file */
G_MODULE_EXPORT char *config_path     = NULL;
G_MODULE_EXPORT char *config_path_new = NULL;
/** Array holding all activated modi. */
Mode                 **modi = NULL;

/**  List of (possibly uninitialized) modi's */
Mode         ** available_modi = NULL;
/** Length of #num_available_modi */
unsigned int num_available_modi = 0;
/** Number of activated modi in #modi array */
unsigned int num_modi = 0;
/** Current selected mode */
unsigned int curr_switcher = 0;

NkBindings   *bindings = NULL;

/** Glib main loop. */
GMainLoop *main_loop = NULL;

/** Flag indicating we are in dmenu mode. */
static int dmenu_mode = FALSE;
/** Rofi's return code */
int        return_code = EXIT_SUCCESS;

void process_result ( RofiViewState *state );

void rofi_set_return_code ( int code )
{
    return_code = code;
}

unsigned int rofi_get_num_enabled_modi ( void )
{
    return num_modi;
}

const Mode * rofi_get_mode ( unsigned int index )
{
    return modi[index];
}

/**
 * @param name Name of the switcher to lookup.
 *
 * Find the index of the switcher with name.
 *
 * @returns index of the switcher in modi, -1 if not found.
 */
static int switcher_get ( const char *name )
{
    for ( unsigned int i = 0; i < num_modi; i++ ) {
        if ( strcmp ( mode_get_name ( modi[i] ), name ) == 0 ) {
            return i;
        }
    }
    return -1;
}

/**
 * Teardown the gui.
 */
static void teardown ( int pfd )
{
    g_debug ( "Teardown" );
    // Cleanup font setup.
    textbox_cleanup ( );

    display_early_cleanup ();

    // Cleanup view
    rofi_view_cleanup ();
    // Cleanup pid file.
    remove_pid_file ( pfd );
}
static void run_switcher ( ModeMode mode )
{
    // Otherwise check if requested mode is enabled.
    for ( unsigned int i = 0; i < num_modi; i++ ) {
        if ( !mode_init ( modi[i] ) ) {
            GString *str = g_string_new ( "Failed to initialize the mode: " );
            g_string_append ( str, modi[i]->name );
            g_string_append ( str, "\n" );

            rofi_view_error_dialog ( str->str, ERROR_MSG_MARKUP );
            g_string_free ( str, FALSE );
            break;
        }
    }
    // Error dialog must have been created.
    if ( rofi_view_get_active () != NULL ) {
        return;
    }
    curr_switcher = mode;
    RofiViewState * state = rofi_view_create ( modi[mode], config.filter, MENU_PROMPT_COLON, process_result );
    if ( state ) {
        rofi_view_set_active ( state );
    }
    if ( rofi_view_get_active () == NULL ) {
        g_main_loop_quit ( main_loop  );
    }
}
void process_result ( RofiViewState *state )
{
    Mode *sw = state->sw;
    rofi_view_set_active ( NULL );
    if ( sw != NULL ) {
        unsigned int selected_line = rofi_view_get_selected_line ( state );;
        MenuReturn   mretv         = rofi_view_get_return_value ( state );
        char         *input        = g_strdup ( rofi_view_get_user_input ( state ) );
        ModeMode     retv          = mode_result ( sw, mretv, &input, selected_line );
        g_free ( input );

        ModeMode mode = curr_switcher;
        // Find next enabled
        if ( retv == NEXT_DIALOG ) {
            mode = ( mode + 1 ) % num_modi;
        }
        else if ( retv == PREVIOUS_DIALOG ) {
            if ( mode == 0 ) {
                mode = num_modi - 1;
            }
            else {
                mode = ( mode - 1 ) % num_modi;
            }
        }
        else if ( retv == RELOAD_DIALOG ) {
            // do nothing.
        }
        else if ( retv == RESET_DIALOG ) {
            rofi_view_clear_input ( state );
        }
        else if ( retv < MODE_EXIT ) {
            mode = ( retv ) % num_modi;
        }
        else {
            mode = retv;
        }
        if ( mode != MODE_EXIT ) {
            /**
             * Load in the new mode.
             */
            rofi_view_switch_mode ( state, modi[mode] );
            rofi_view_set_active ( state );
            curr_switcher = mode;
            return;
        }
    }
    rofi_view_free ( state );
}

/**
 * Help function.
 */
static void print_list_of_modi ( int is_term )
{
    for ( unsigned int i = 0; i < num_available_modi; i++ ) {
        gboolean active = FALSE;
        for ( unsigned int j = 0; j < num_modi; j++ ) {
            if ( modi[j] == available_modi[i] ) {
                active = TRUE;
                break;
            }
        }
        printf ( "        * %s%s%s%s\n",
                 active ? "+" : "",
                 is_term ? ( active ? color_green : color_red ) : "",
                 available_modi[i]->name,
                 is_term ? color_reset : ""
                 );
    }
}
static void print_main_application_options ( int is_term )
{
    print_help_msg ( "-no-config", "", "Do not load configuration, use default values.", NULL, is_term );
    print_help_msg ( "-v,-version", "", "Print the version number and exit.", NULL, is_term  );
    print_help_msg ( "-dmenu", "", "Start in dmenu mode.", NULL, is_term );
    print_help_msg ( "-display", "[string]", "X server to contact.", "${DISPLAY}", is_term );
    print_help_msg ( "-h,-help", "", "This help message.", NULL, is_term );
    print_help_msg ( "-dump-xresources", "", "Dump the current configuration in Xresources format and exit.", NULL, is_term );
    print_help_msg ( "-e", "[string]", "Show a dialog displaying the passed message and exit.", NULL, is_term );
    print_help_msg ( "-markup", "", "Enable pango markup where possible.", NULL, is_term );
    print_help_msg ( "-normal-window", "", "In dmenu mode, behave as a normal window. (experimental)", NULL, is_term );
    print_help_msg ( "-show", "[mode]", "Show the mode 'mode' and exit. The mode has to be enabled.", NULL, is_term );
    print_help_msg ( "-no-lazy-grab", "", "Disable lazy grab that, when fail to grab keyboard, does not block but retry later.", NULL, is_term );
    print_help_msg ( "-no-plugins", "", "Disable loading of external plugins.", NULL, is_term );
    print_help_msg ( "-dump-config", "", "Dump the current configuration in rasi format and exit.", NULL, is_term );
    print_help_msg ( "-dump-theme", "", "Dump the current theme in rasi format and exit.", NULL, is_term );
}
static void help ( G_GNUC_UNUSED int argc, char **argv )
{
    int is_term = isatty ( fileno ( stdout ) );
    printf ( "%s usage:\n", argv[0] );
    printf ( "\t%s [-options ...]\n\n", argv[0] );
    printf ( "Command line only options:\n" );
    print_main_application_options ( is_term );
    printf ( "DMENU command line options:\n" );
    print_dmenu_options ();
    printf ( "Global options:\n" );
    print_options ();
    printf ( "\n" );
    display_dump_monitor_layout ();
    printf ( "\n" );
    printf ( "Detected modi:\n" );
    print_list_of_modi ( is_term );
    printf ( "\n" );
    printf ( "Compile time options:\n" );
#ifdef WINDOW_MODE
    printf ( "\t* window  %senabled%s\n", is_term ? color_green : "", is_term ? color_reset : "" );
#else
    printf ( "\t* window  %sdisabled%s\n", is_term ? color_red : "", is_term ? color_reset : "" );
#endif
#ifdef ENABLE_DRUN
    printf ( "\t* drun    %senabled%s\n", is_term ? color_green : "", is_term ? color_reset : "" );
#else
    printf ( "\t* drun    %sdisabled%s\n", is_term ? color_red : "", is_term ? color_reset : "" );
#endif
#ifdef TIMINGS
    printf ( "\t* timings %senabled%s\n", is_term ? color_green : "", is_term ? color_reset : "" );
#else
    printf ( "\t* timings %sdisabled%s\n", is_term ? color_red : "", is_term ? color_reset : "" );
#endif
#ifdef ENABLE_GCOV
    printf ( "\t* gcov    %senabled%s\n", is_term ? color_green : "", is_term ? color_reset : "" );
#else
    printf ( "\t* gcov    %sdisabled%s\n", is_term ? color_red : "", is_term ? color_reset : "" );
#endif
#ifdef ENABLE_ASAN
    printf ( "\t* asan    %senabled%s\n", is_term ? color_green : "", is_term ? color_reset : "" );
#else
    printf ( "\t* asan    %sdisabled%s\n", is_term ? color_red : "", is_term ? color_reset : "" );
#endif
    printf ( "\n" );
    printf ( "For more information see: %sman rofi%s\n", is_term ? color_bold : "", is_term ? color_reset : "" );
#ifdef GIT_VERSION
    printf ( "                 Version: %s"GIT_VERSION "%s\n", is_term ? color_bold : "", is_term ? color_reset : "" );
#else
    printf ( "                 Version: %s"VERSION "%s\n", is_term ? color_bold : "", is_term ? color_reset : "" );
#endif
    printf ( "              Bugreports: %s"PACKAGE_BUGREPORT "%s\n", is_term ? color_bold : "", is_term ? color_reset : "" );
    printf ( "                 Support: %s"PACKAGE_URL "%s\n", is_term ? color_bold : "", is_term ? color_reset : "" );
    printf ( "                          %s#rofi @ freenode.net%s\n", is_term ? color_bold : "", is_term ? color_reset : "" );
    if ( find_arg ( "-no-config" ) < 0 ) {
        if ( config_path_new ) {
            printf ( "      Configuration file: %s%s%s\n", is_term ? color_bold : "", config_path_new, is_term ? color_reset : "" );
        }
        else {
            printf ( "      Configuration file: %s%s%s\n", is_term ? color_bold : "", config_path, is_term ? color_reset : "" );
        }
    }
    else {
        printf ( "      Configuration file: %sDisabled%s\n", is_term ? color_bold : "", is_term ? color_reset : "" );
    }
}

static void help_print_disabled_mode ( const char *mode )
{
    int is_term = isatty ( fileno ( stdout ) );
    // Only  output to terminal
    if ( is_term ) {
        fprintf ( stderr, "Mode %s%s%s is not enabled. I have enabled it for now.\n",
                  color_red, mode, color_reset );
        fprintf ( stderr, "Please consider adding %s%s%s to the list of enabled modi: %smodi: %s%s%s,%s%s.\n",
                  color_red, mode, color_reset,
                  color_green, config.modi, color_reset,
                  color_red, mode, color_reset
                  );
    }
}
static void help_print_mode_not_found ( const char *mode )
{
    int is_term = isatty ( fileno ( stdout ) );
    fprintf ( stderr, "Mode %s%s%s is not found.\n",
              is_term ? color_red : "", mode, is_term ? color_reset : "" );
    fprintf ( stderr, "The following modi are known:\n" );
    print_list_of_modi ( is_term );
    printf ( "\n" );
}
static void help_print_no_arguments ( void )
{
    int is_term = isatty ( fileno ( stdout ) );
    // Daemon mode
    fprintf ( stderr, "Rofi is unsure what to show.\n" );
    fprintf ( stderr, "Please specify the mode you want to show.\n\n" );
    fprintf ( stderr, "    %srofi%s -show %s{mode}%s\n\n",
              is_term ? color_bold : "", is_term ? color_reset : "",
              is_term ? color_green : "", is_term ? color_reset : "" );
    fprintf ( stderr, "The following modi are enabled:\n" );
    for ( unsigned int j = 0; j < num_modi; j++ ) {
        fprintf ( stderr, " * %s%s%s\n",
                  is_term ? color_green : "",
                  modi[j]->name,
                  is_term ? color_reset : "" );
    }
    fprintf ( stderr, "\nThe following can be enabled:\n" );
    for  ( unsigned int i = 0; i < num_available_modi; i++ ) {
        gboolean active = FALSE;
        for ( unsigned int j = 0; j < num_modi; j++ ) {
            if ( modi[j] == available_modi[i] ) {
                active = TRUE;
                break;
            }
        }
        if ( !active ) {
            fprintf ( stderr, " * %s%s%s\n",
                      is_term ? color_red : "",
                      available_modi[i]->name,
                      is_term ? color_reset : "" );
        }
    }
    fprintf ( stderr, "\nTo activate a mode, add it to the list of modi in the %smodi%s setting.\n",
              is_term ? color_green : "", is_term ? color_reset : "" );
}

/**
 * Cleanup globally allocated memory.
 */
static void cleanup ()
{
    for ( unsigned int i = 0; i < num_modi; i++ ) {
        mode_destroy ( modi[i] );
    }
    rofi_view_workers_finalize ();
    if ( main_loop != NULL  ) {
        g_main_loop_unref ( main_loop );
        main_loop = NULL;
    }
    // Cleanup
    display_cleanup ();

    nk_bindings_free ( bindings );

    // Cleaning up memory allocated by the Xresources file.
    config_xresource_free ();
    for ( unsigned int i = 0; i < num_modi; i++ ) {
        mode_free ( &( modi[i] ) );
    }
    g_free ( modi );

    g_free ( config_path );
    g_free ( config_path_new );

    if ( list_of_error_msgs ) {
        for ( GList *iter = g_list_first ( list_of_error_msgs );
              iter != NULL; iter = g_list_next ( iter ) ) {
            g_string_free ( (GString *) iter->data, TRUE );
        }
        g_list_free ( list_of_error_msgs );
    }

    if ( rofi_theme ) {
        rofi_theme_free ( rofi_theme );
        rofi_theme = NULL;
    }
    TIMINGS_STOP ();
    rofi_collect_modi_destroy ( );
}

/**
 * Collected modi
 */

/**
 * @param name Search for mode with this name.
 *
 * @return returns Mode * when found, NULL if not.
 */
Mode * rofi_collect_modi_search ( const char *name )
{
    for ( unsigned int i = 0; i < num_available_modi; i++ ) {
        if ( g_strcmp0 ( name, available_modi[i]->name ) == 0 ) {
            return available_modi[i];
        }
    }
    return NULL;
}
/**
 * @param mode Add mode to list.
 *
 * @returns TRUE when success.
 */
static gboolean rofi_collect_modi_add ( Mode *mode )
{
    Mode *m = rofi_collect_modi_search ( mode->name );
    if ( m == NULL ) {
        available_modi = g_realloc ( available_modi, sizeof ( Mode * ) * ( num_available_modi + 1 ) );
        // Set mode.
        available_modi[num_available_modi] = mode;
        num_available_modi++;
        return TRUE;
    }
    return FALSE;
}

static void rofi_collect_modi_dir ( const char *base_dir )
{
    GDir *dir = g_dir_open ( base_dir, 0, NULL );
    if ( dir ) {
        const char *dn = NULL;
        while ( ( dn = g_dir_read_name ( dir ) ) ) {
            if ( !g_str_has_suffix ( dn, G_MODULE_SUFFIX ) ) {
                continue;
            }
            char    *fn  = g_build_filename ( PLUGIN_PATH, dn, NULL );
            GModule *mod = g_module_open ( fn, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL );
            if ( mod ) {
                Mode *m = NULL;
                if ( g_module_symbol ( mod, "mode", (gpointer *) &m ) ) {
                    if ( m->abi_version != ABI_VERSION ) {
                        g_warning ( "ABI version of plugin: '%s' does not match: %08X expecting: %08X", dn, m->abi_version, ABI_VERSION );
                        g_module_close ( mod );
                    }
                    else {
                        m->module = mod;
                        if ( !rofi_collect_modi_add ( m ) ) {
                            g_module_close ( mod );
                        }
                    }
                }
                else {
                    g_warning ( "Symbol 'mode' not found in module: %s", dn );
                    g_module_close ( mod );
                }
            }
            else {
                g_warning ( "Failed to open 'mode' plugin: '%s', error: %s", dn, g_module_error () );
            }
            g_free ( fn );
        }
        g_dir_close ( dir );
    }
}

/**
 * Find all available modi.
 */
static void rofi_collect_modi ( void )
{
#ifdef WINDOW_MODE
    rofi_collect_modi_add ( &window_mode );
    rofi_collect_modi_add ( &window_mode_cd );
#endif
    rofi_collect_modi_add ( &run_mode );
    rofi_collect_modi_add ( &ssh_mode );
#ifdef ENABLE_DRUN
    rofi_collect_modi_add ( &drun_mode );
#endif
    rofi_collect_modi_add ( &combi_mode );
    rofi_collect_modi_add ( &help_keys_mode );

    if ( find_arg ( "-no-plugins" ) < 0 ) {
        rofi_collect_modi_dir ( config.plugin_path );
    }
}

/**
 * Setup configuration for config.
 */
static void rofi_collect_modi_setup ( void )
{
    for  ( unsigned int i = 0; i < num_available_modi; i++ ) {
        mode_set_config ( available_modi[i] );
    }
}
static void rofi_collect_modi_destroy ( void )
{
    for  ( unsigned int i = 0; i < num_available_modi; i++ ) {
        if ( available_modi[i]->module ) {
            g_module_close ( available_modi[i]->module );
        }
    }
    g_free ( available_modi );
    available_modi     = NULL;
    num_available_modi = 0;
}

/**
 * Parse the switcher string, into internal array of type Mode.
 *
 * String is split on separator ','
 * First the three build-in modi are checked: window, run, ssh
 * if that fails, a script-switcher is created.
 */
static int add_mode ( const char * token )
{
    unsigned int index = num_modi;
    // Resize and add entry.
    modi = (Mode * *) g_realloc ( modi, sizeof ( Mode* ) * ( num_modi + 1 ) );

    Mode *mode = rofi_collect_modi_search ( token );
    if ( mode ) {
        modi[num_modi] = mode;
        num_modi++;
    }
    else if ( script_switcher_is_valid ( token ) ) {
        // If not build in, use custom modi.
        Mode *sw = script_switcher_parse_setup ( token );
        if ( sw != NULL ) {
            modi[num_modi] = sw;
            num_modi++;
        }
    }
    return ( index == num_modi ) ? -1 : (int) index;
}
static gboolean setup_modi ( void )
{
    const char *const sep     = ",#";
    char              *savept = NULL;
    // Make a copy, as strtok will modify it.
    char              *switcher_str = g_strdup ( config.modi );
    // Split token on ','. This modifies switcher_str.
    for ( char *token = strtok_r ( switcher_str, sep, &savept ); token != NULL; token = strtok_r ( NULL, sep, &savept ) ) {
        if ( add_mode ( token ) == -1 ) {
            help_print_mode_not_found ( token );
            g_free ( switcher_str );
            return TRUE;
        }
    }
    // Free string that was modified by strtok_r
    g_free ( switcher_str );
    return FALSE;
}

void rofi_quit_main_loop ( void )
{
    g_main_loop_quit ( main_loop );
}

static gboolean main_loop_signal_handler_int ( G_GNUC_UNUSED gpointer data )
{
    // Break out of loop.
    g_main_loop_quit ( main_loop );
    return G_SOURCE_CONTINUE;
}

static gboolean startup ( G_GNUC_UNUSED gpointer data )
{
    TICK_N ( "Startup" );
    // flags to run immediately and exit
    char      *sname       = NULL;
    char      *msg         = NULL;
    MenuFlags window_flags = MENU_NORMAL;

    if ( find_arg ( "-normal-window" ) >= 0 ) {
        window_flags |= MENU_NORMAL_WINDOW;
    }
    TICK_N ( "Grab keyboard" );
    __create_window ( window_flags );
    TICK_N ( "Create Window" );
    // Parse the keybindings.
    TICK_N ( "Parse ABE" );
    // Sanity check
    config_sanity_check ( );
    TICK_N ( "Config sanity check" );

    if ( list_of_error_msgs != NULL ) {
        GString *emesg = g_string_new ( "The following errors where detected when starting rofi:\n" );
        GList   *iter  = g_list_first ( list_of_error_msgs );
        int     index  = 0;
        for (; iter != NULL && index < 2; iter = g_list_next ( iter ) ) {
            GString *msg = (GString *) ( iter->data );
            g_string_append ( emesg, "\n\n" );
            g_string_append ( emesg, msg->str );
            index++;
        }
        if ( g_list_length ( iter ) > 1 ) {
            g_string_append_printf ( emesg, "\nThere are <b>%d</b> more errors.", g_list_length ( iter ) - 1 );
        }
        rofi_view_error_dialog ( emesg->str, ERROR_MSG_MARKUP );
        g_string_free ( emesg, TRUE );
        return G_SOURCE_REMOVE;
    }
    // Dmenu mode.
    if ( dmenu_mode == TRUE ) {
        // force off sidebar mode:
        config.sidebar_mode = FALSE;
        int retv = dmenu_switcher_dialog ();
        if ( retv ) {
            rofi_set_return_code ( EXIT_SUCCESS );
            // Directly exit.
            g_main_loop_quit ( main_loop );
        }
    }
    else if ( find_arg_str (  "-e", &( msg ) ) ) {
        int markup = FALSE;
        if ( find_arg ( "-markup" ) >= 0 ) {
            markup = TRUE;
        }
        if (  !rofi_view_error_dialog ( msg, markup ) ) {
            g_main_loop_quit ( main_loop );
        }
    }
    else if ( find_arg_str ( "-show", &sname ) == TRUE ) {
        int index = switcher_get ( sname );
        if ( index < 0 ) {
            // Add it to the list
            index = add_mode ( sname );
            // Complain
            if ( index >= 0 ) {
                help_print_disabled_mode ( sname );
            }
            // Run it anyway if found.
        }
        if ( index >= 0 ) {
            run_switcher ( index );
        }
        else {
            help_print_mode_not_found ( sname );
            g_main_loop_quit ( main_loop );
            return G_SOURCE_REMOVE;
        }
    }
    else if ( find_arg ( "-show" ) >= 0 && num_modi > 0 ) {
        run_switcher ( 0 );
    }
    else{
        help_print_no_arguments ( );

        g_main_loop_quit ( main_loop );
    }

    return G_SOURCE_REMOVE;
}

static gboolean record ( G_GNUC_UNUSED void *data )
{
    rofi_capture_screenshot ();
    return G_SOURCE_CONTINUE;
}
/**
 * @param argc number of input arguments.
 * @param argv array of the input arguments.
 *
 * Main application entry point.
 *
 * @returns return code of rofi.
 */
int main ( int argc, char *argv[] )
{
    TIMINGS_START ();

    cmd_set_arguments ( argc, argv );

    // Version
    if ( find_arg (  "-v" ) >= 0 || find_arg (  "-version" ) >= 0 ) {
#ifdef GIT_VERSION
        g_print ( "Version: "GIT_VERSION "\n" );
#else
        g_print ( "Version: "VERSION "\n" );
#endif
        return EXIT_SUCCESS;
    }

    // Detect if we are in dmenu mode.
    // This has two possible causes.
    // 1 the user specifies it on the command-line.
    if ( find_arg (  "-dmenu" ) >= 0 ) {
        dmenu_mode = TRUE;
    }
    // 2 the binary that executed is called dmenu (e.g. symlink to rofi)
    else{
        // Get the base name of the executable called.
        char               *base_name = g_path_get_basename ( argv[0] );
        const char * const dmenu_str  = "dmenu";
        dmenu_mode = ( strcmp ( base_name, dmenu_str ) == 0 );
        // Free the basename for dmenu detection.
        g_free ( base_name );
    }
    TICK ();
    // Get the path to the cache dir.
    cache_dir = g_get_user_cache_dir ();

    if ( g_mkdir_with_parents ( cache_dir, 0700 ) < 0 ) {
        g_warning ( "Failed to create cache directory: %s", g_strerror ( errno ) );
        return EXIT_FAILURE;
    }

    // Create pid file path.
    const char *path = g_get_user_runtime_dir ();
    if ( path ) {
        if ( g_mkdir_with_parents ( path, 0700 ) < 0 ) {
            g_warning ( "Failed to create user runtime directory: %s with error: %s", path, g_strerror ( errno ) );
            pidfile = g_build_filename ( g_get_home_dir (), ".rofi.pid", NULL );
        }
        else {
            pidfile = g_build_filename ( path, "rofi.pid", NULL );
        }
    }
    config_parser_add_option ( xrm_String, "pid", (void * *) &pidfile, "Pidfile location" );

    if ( find_arg ( "-config" ) < 0 ) {
        const char *cpath = g_get_user_config_dir ();
        if ( cpath ) {
            config_path     = g_build_filename ( cpath, "rofi", "config", NULL );
            config_path_new = g_strconcat ( config_path, ".rasi", NULL );
        }
    }
    else {
        char *c = NULL;
        find_arg_str ( "-config", &c );
        if ( g_str_has_suffix ( c, ".rasi" ) ) {
            config_path_new = rofi_expand_path ( c );
        }
        else {
            config_path = rofi_expand_path ( c );
        }
    }

    TICK ();
    if ( setlocale ( LC_ALL, "" ) == NULL ) {
        g_warning ( "Failed to set locale." );
        cleanup ();
        return EXIT_FAILURE;
    }

    TICK_N ( "Setup Locale" );
    rofi_collect_modi ();
    TICK_N ( "Collect MODI" );
    rofi_collect_modi_setup ();
    TICK_N ( "Setup MODI" );

    main_loop = g_main_loop_new ( NULL, FALSE );

    TICK_N ( "Setup mainloop" );

    bindings = nk_bindings_new ();
    TICK_N ( "NK Bindings" );

    if ( !display_setup ( main_loop, bindings ) ) {
        g_warning ( "Connection has error" );
        cleanup ();
        return EXIT_FAILURE;
    }
    TICK_N ( "Setup Display" );

    // Setup keybinding
    setup_abe ();
    TICK_N ( "Setup abe" );

    if ( find_arg ( "-no-config" ) < 0 ) {
        // Load distro default settings
        gchar *etc = g_build_filename ( SYSCONFDIR, "rofi.conf", NULL );
        if ( g_file_test ( etc, G_FILE_TEST_IS_REGULAR ) ) {
            config_parse_xresource_options_file ( etc );
        }
        g_free ( etc );
        // Load in config from X resources.
        config_parse_xresource_options ( xcb );
        if ( config_path_new && g_file_test ( config_path_new, G_FILE_TEST_IS_REGULAR ) ) {
            if ( rofi_theme_parse_file ( config_path_new ) ) {
                rofi_theme_free ( rofi_theme );
                rofi_theme = NULL;
            }
        }
        else {
            config_parse_xresource_options_file ( config_path );
        }
    }
    find_arg_str ( "-theme", &( config.theme ) );
    if ( config.theme ) {
        TICK_N ( "Parse theme" );
        if ( rofi_theme_parse_file ( config.theme ) ) {
            // TODO: instantiate fallback theme.?
            rofi_theme_free ( rofi_theme );
            rofi_theme = NULL;
        }
        TICK_N ( "Parsed theme" );
    }
    // Parse command line for settings, independent of other -no-config.
    config_parse_cmd_options ( );
    TICK_N ( "Load cmd config " );

    parse_keys_abe ( bindings );

    /** dirty hack for dmenu compatibility */
    char *windowid = NULL;
    if ( !dmenu_mode ) {
        // setup_modi
        if ( setup_modi () ) {
            cleanup ();
            return EXIT_FAILURE;
        }
        TICK_N ( "Setup Modi" );
    }
    else {
        // Hack for dmenu compatibility.
        if ( find_arg_str ( "-w", &windowid ) == TRUE ) {
            config.monitor = g_strdup_printf ( "wid:%s", windowid );
            windowid       = config.monitor;
        }
    }
    if ( rofi_theme_is_empty ( ) ) {
        if ( rofi_theme_parse_string ( default_theme ) ) {
            g_warning ( "Failed to parse default theme. Giving up.." );
            if ( list_of_error_msgs ) {
                for ( GList *iter = g_list_first ( list_of_error_msgs );
                      iter != NULL; iter = g_list_next ( iter ) ) {
                    g_warning ( "Error: %s%s%s",
                                color_bold, ( (GString *) iter->data )->str, color_reset );
                }
            }
            rofi_theme = NULL;
            cleanup ();
            return EXIT_FAILURE;
        }
        rofi_theme_convert_old ();
    }

    /**
     * Make small commandline changes to the current theme.
     */
    const char ** theme_str = find_arg_strv ( "-theme-str" );
    if ( theme_str ) {
        for ( int index = 0; theme_str && theme_str[index]; index++ ) {
            if ( rofi_theme_parse_string ( theme_str[index] ) ) {
                rofi_theme_free ( rofi_theme );
                rofi_theme = NULL;
            }
        }
        g_free ( theme_str );
    }

    if ( find_arg ( "-dump-theme" ) >= 0 ) {
        rofi_theme_print ( rofi_theme );
        cleanup ();
        return EXIT_SUCCESS;
    }
    if ( find_arg ( "-dump-config" ) >= 0 ) {
        config_parse_dump_config_rasi_format ( FALSE );
        cleanup ();
        return EXIT_SUCCESS;
    }
    // Dump.
    // catch help request
    if ( find_arg (  "-h" ) >= 0 || find_arg (  "-help" ) >= 0 || find_arg (  "--help" ) >= 0 ) {
        help ( argc, argv );
        cleanup ();
        return EXIT_SUCCESS;
    }
    if ( find_arg (  "-dump-xresources" ) >= 0 ) {
        config_parse_xresource_dump ();
        cleanup ();
        return EXIT_SUCCESS;
    }

    unsigned int interval = 1;
    if ( find_arg_uint ( "-record-screenshots", &interval ) ) {
        g_timeout_add ( 1000 / (double) interval, record, NULL );
    }

    rofi_view_workers_initialize ();

    // Create pid file
    int pfd = create_pid_file ( pidfile );
    if ( pfd < 0 ) {
        cleanup ();
        return EXIT_FAILURE;
    }
    textbox_setup ();

    if ( !display_late_setup () ) {
        g_warning ( "Failed to properly finish display setup" );
        cleanup ();
        return EXIT_FAILURE;
    }
    TICK_N ( "Setup late Display" );

    // Setup signal handling sources.
    // SIGINT
    g_unix_signal_add ( SIGINT, main_loop_signal_handler_int, NULL );

    g_idle_add ( startup, NULL );

    // Start mainloop.
    g_main_loop_run ( main_loop );
    teardown ( pfd );
    cleanup ();

    /* dirty hack */
    g_free ( windowid );
    return return_code;
}