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+/*
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+ Widgets for the Midnight Commander
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+
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+ Copyright (C) 1994-2019
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+ Free Software Foundation, Inc.
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+
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+ Authors:
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+ Radek Doulik, 1994, 1995
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+ Miguel de Icaza, 1994, 1995
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+ Jakub Jelinek, 1995
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+ Andrej Borsenkow, 1996
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+ Norbert Warmuth, 1997
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+ Andrew Borodin <aborodin@vmail.ru>, 2009-2019
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+
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+ This file is part of the Midnight Commander.
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+
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+ The Midnight Commander is free software: you can redistribute it
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+ and/or modify it under the terms of the GNU General Public License as
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+ published by the Free Software Foundation, either version 3 of the License,
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+ or (at your option) any later version.
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+
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+ The Midnight Commander is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+/** \file history.c
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+ * \brief Source: save and load history
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+ */
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+
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+#include <config.h>
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+
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+#include <stdlib.h>
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+#include <sys/types.h>
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+
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+#include "lib/global.h"
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+
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+#include "lib/fileloc.h" /* MC_HISTORY_FILE */
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+#include "lib/strutil.h"
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+#include "lib/util.h" /* list_append_unique */
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+
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+#include "lib/mcconfig.h"
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+
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+/*** global variables ****************************************************************************/
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+
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+/* how much history items are used */
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+int num_history_items_recorded = 60;
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+
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+/*** file scope macro definitions ****************************************************************/
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+
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+/*** file scope type declarations ****************************************************************/
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+
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+/*** file scope variables ************************************************************************/
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+
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+/* --------------------------------------------------------------------------------------------- */
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+/*** file scope functions ************************************************************************/
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+/* --------------------------------------------------------------------------------------------- */
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+
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+/* --------------------------------------------------------------------------------------------- */
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+/*** public functions ****************************************************************************/
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+/* --------------------------------------------------------------------------------------------- */
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+
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+/**
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+ * Load the history from the ${XDG_CACHE_HOME}/mc/history file.
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+ * It is called with the widgets history name and returns the GList list.
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+ */
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+
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+GList *
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+mc_config_history_get (const char *name)
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+{
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+ GList *hist = NULL;
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+ char *profile;
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+ mc_config_t *cfg;
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+
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+ if (num_history_items_recorded == 0) /* this is how to disable */
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+ return NULL;
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+ if (name == NULL || *name == '\0')
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+ return NULL;
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+
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+ profile = mc_config_get_full_path (MC_HISTORY_FILE);
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+ cfg = mc_config_init (profile, TRUE);
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+
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+ hist = mc_config_history_load (cfg, name);
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+
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+ mc_config_deinit (cfg);
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+ g_free (profile);
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+
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+ return hist;
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+}
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+
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+/* --------------------------------------------------------------------------------------------- */
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+
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+/**
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+ * Load history from the mc_config
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+ */
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+GList *
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+mc_config_history_load (mc_config_t * cfg, const char *name)
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+{
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+ size_t i;
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+ GList *hist = NULL;
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+ char **keys;
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+ size_t keys_num = 0;
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+ GIConv conv = INVALID_CONV;
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+ GString *buffer;
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+
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+ if (name == NULL || *name == '\0')
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+ return NULL;
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+
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+ /* get number of keys */
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+ keys = mc_config_get_keys (cfg, name, &keys_num);
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+ g_strfreev (keys);
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+
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+ /* create charset conversion handler to convert strings
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+ from utf-8 to system codepage */
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+ if (!mc_global.utf8_display)
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+ conv = str_crt_conv_from ("UTF-8");
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+
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+ buffer = g_string_sized_new (64);
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+
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+ for (i = 0; i < keys_num; i++)
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+ {
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+ char key[BUF_TINY];
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+ char *this_entry;
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+
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+ g_snprintf (key, sizeof (key), "%lu", (unsigned long) i);
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+ this_entry = mc_config_get_string_raw (cfg, name, key, "");
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+
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+ if (this_entry == NULL)
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+ continue;
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+
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+ if (conv == INVALID_CONV)
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+ hist = list_append_unique (hist, this_entry);
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+ else
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+ {
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+ g_string_set_size (buffer, 0);
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+ if (str_convert (conv, this_entry, buffer) == ESTR_FAILURE)
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+ hist = list_append_unique (hist, this_entry);
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+ else
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+ {
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+ hist = list_append_unique (hist, g_strndup (buffer->str, buffer->len));
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+ g_free (this_entry);
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+ }
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+ }
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+ }
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+
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+ g_string_free (buffer, TRUE);
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+ if (conv != INVALID_CONV)
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+ str_close_conv (conv);
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+
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+ /* return pointer to the last entry in the list */
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+ return g_list_last (hist);
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+}
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+
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+/* --------------------------------------------------------------------------------------------- */
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+
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+/**
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+ * Save history to the mc_config, but don't save config to file
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+ */
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+void
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+mc_config_history_save (mc_config_t * cfg, const char *name, GList * h)
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+{
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+ GIConv conv = INVALID_CONV;
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+ GString *buffer;
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+ int i;
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+
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+ if (name == NULL || *name == '\0' || h == NULL)
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+ return;
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+
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+ /* go to end of list */
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+ h = g_list_last (h);
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+
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+ /* go back 60 places */
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+ for (i = 0; (i < num_history_items_recorded - 1) && (h->prev != NULL); i++)
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+ h = g_list_previous (h);
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+
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+ if (name != NULL)
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+ mc_config_del_group (cfg, name);
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+
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+ /* create charset conversion handler to convert strings
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+ from system codepage to UTF-8 */
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+ if (!mc_global.utf8_display)
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+ conv = str_crt_conv_to ("UTF-8");
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+
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+ buffer = g_string_sized_new (64);
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+
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+ /* dump history into profile */
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+ for (i = 0; h != NULL; h = g_list_next (h))
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+ {
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+ char key[BUF_TINY];
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+ char *text = (char *) h->data;
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+
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+ /* We shouldn't have null entries, but let's be sure */
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+ if (text == NULL)
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+ continue;
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+
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+ g_snprintf (key, sizeof (key), "%d", i++);
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+
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+ if (conv == INVALID_CONV)
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+ mc_config_set_string_raw (cfg, name, key, text);
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+ else
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+ {
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+ g_string_set_size (buffer, 0);
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+ if (str_convert (conv, text, buffer) == ESTR_FAILURE)
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+ mc_config_set_string_raw (cfg, name, key, text);
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+ else
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+ mc_config_set_string_raw (cfg, name, key, buffer->str);
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+ }
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+ }
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+
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+ g_string_free (buffer, TRUE);
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+ if (conv != INVALID_CONV)
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+ str_close_conv (conv);
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+}
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+
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+/* --------------------------------------------------------------------------------------------- */
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Andrew Borodin