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/**
 * rofi
 *
 * MIT/X11 License
 * 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.
 *
 */
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <rofi.h>
#include "settings.h"

#include <dialogs/dialogs.h>

/**
 * Combi Mode
 */
typedef struct
{
    // List of (combined) entries.
    unsigned int cmd_list_length;
    // List to validate where each switcher starts.
    unsigned int *starts;
    unsigned int *lengths;
    // List of switchers to combine.
    unsigned int num_switchers;
    Mode         **switchers;
    Mode         *current;
} CombiModePrivateData;

static void combi_mode_parse_switchers ( Mode *sw )
{
    CombiModePrivateData *pd     = mode_get_private_data ( sw );
    char                 *savept = NULL;
    // Make a copy, as strtok will modify it.
    char                 *switcher_str = g_strdup ( config.combi_modi );
    const char * const   sep           = ",";
    // Split token on ','. This modifies switcher_str.
    for ( char *token = strtok_r ( switcher_str, sep, &savept ); token != NULL;
          token = strtok_r ( NULL, sep, &savept ) ) {
        // Resize and add entry.
        pd->switchers = (Mode * *) g_realloc ( pd->switchers,
                                               sizeof ( Mode* ) * ( pd->num_switchers + 1 ) );

        // Window switcher.
        #ifdef WINDOW_MODE
        if ( strcasecmp ( token, "window" ) == 0 ) {
            pd->switchers[pd->num_switchers++] = &window_mode;
        }
        else if ( strcasecmp ( token, "windowcd" ) == 0 ) {
            pd->switchers[pd->num_switchers++] = &window_mode_cd;
        }
        else
        #endif // WINDOW_MODE
        // SSh dialog
        if ( strcasecmp ( token, "ssh" ) == 0 ) {
            pd->switchers[pd->num_switchers++] = &ssh_mode;
        }
        // Run dialog
        else if ( strcasecmp ( token, "run" ) == 0 ) {
            pd->switchers[pd->num_switchers++] = &run_mode;
        }
        #ifdef ENABLE_DRUN
        else if ( strcasecmp ( token, "drun" ) == 0 ) {
            pd->switchers[pd->num_switchers++] = &drun_mode;
        }
#endif  // ENABLE_DRUN
        else {
            // If not build in, use custom switchers.
            Mode *sw = script_switcher_parse_setup ( token );
            if ( sw != NULL ) {
                pd->switchers[pd->num_switchers++] = sw;
            }
            else{
                // Report error, don't continue.
                fprintf ( stderr, "Invalid script switcher: %s\n", token );
                token = NULL;
            }
        }
        // Keybinding.
    }
    // Free string that was modified by strtok_r
    g_free ( switcher_str );
}

static int combi_mode_init ( Mode *sw )
{
    if ( mode_get_private_data ( sw ) == NULL ) {
        CombiModePrivateData *pd = g_malloc0 ( sizeof ( *pd ) );
        mode_set_private_data ( sw, (void *) pd );
        combi_mode_parse_switchers ( sw );
        pd->starts  = g_malloc0 ( sizeof ( int ) * pd->num_switchers );
        pd->lengths = g_malloc0 ( sizeof ( int ) * pd->num_switchers );
        for ( unsigned int i = 0; i < pd->num_switchers; i++ ) {
            if ( !mode_init ( pd->switchers[i] ) ) {
                return FALSE;
            }
        }
        if ( pd->cmd_list_length == 0 ) {
            pd->cmd_list_length = 0;
            for ( unsigned int i = 0; i < pd->num_switchers; i++ ) {
                unsigned int length = mode_get_num_entries ( pd->switchers[i] );
                pd->starts[i]        = pd->cmd_list_length;
                pd->lengths[i]       = length;
                pd->cmd_list_length += length;
            }
        }
    }
    return TRUE;
}
static unsigned int combi_mode_get_num_entries ( const Mode *sw )
{
    const CombiModePrivateData *pd = (const CombiModePrivateData *) mode_get_private_data ( sw );
    return pd->cmd_list_length;
}
static void combi_mode_destroy ( Mode *sw )
{
    CombiModePrivateData *pd = (CombiModePrivateData *) mode_get_private_data ( sw );
    if ( pd != NULL ) {
        g_free ( pd->starts );
        g_free ( pd->lengths );
        // Cleanup switchers.
        for ( unsigned int i = 0; i < pd->num_switchers; i++ ) {
            mode_destroy ( pd->switchers[i] );
        }
        g_free ( pd->switchers );
        g_free ( pd );
        mode_set_private_data ( sw, NULL );
    }
}
static ModeMode combi_mode_result ( Mode *sw, int mretv, char **input, unsigned int selected_line )
{
    CombiModePrivateData *pd = mode_get_private_data ( sw );
    if ( *input[0] == '!' ) {
        int switcher = -1;
        for ( unsigned i = 0; switcher == -1 && i < pd->num_switchers; i++ ) {
            if ( ( *input )[1] == mode_get_name ( pd->switchers[i] )[0] ) {
                switcher = i;
            }
        }
        if ( switcher >= 0  ) {
            char *n = strchr ( *input, ' ' );
            // skip whitespace
            if ( n != NULL ) {
                n++;
                return mode_result ( pd->switchers[switcher], mretv, &n,
                                     selected_line - pd->starts[switcher] );
            }
            return MODE_EXIT;
        }
    }
    if ( mretv & MENU_QUICK_SWITCH ) {
        return mretv & MENU_LOWER_MASK;
    }

    for ( unsigned i = 0; i < pd->num_switchers; i++ ) {
        if ( selected_line >= pd->starts[i] &&
             selected_line < ( pd->starts[i] + pd->lengths[i] ) ) {
            return mode_result ( pd->switchers[i], mretv, input, selected_line - pd->starts[i] );
        }
    }
    return MODE_EXIT;
}
static int combi_mode_match ( const Mode *sw, GRegex **tokens, unsigned int index )
{
    CombiModePrivateData *pd = mode_get_private_data ( sw );
    for ( unsigned i = 0; i < pd->num_switchers; i++ ) {
        if ( pd->current != NULL && pd->switchers[i] != pd->current ) {
            continue;
        }