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+/*
+ Widgets for the Midnight Commander
+
+ Copyright (C) 1994-2023
+ Free Software Foundation, Inc.
+
+ Authors:
+ Radek Doulik, 1994, 1995
+ Miguel de Icaza, 1994, 1995
+ Jakub Jelinek, 1995
+ Andrej Borsenkow, 1996
+ Norbert Warmuth, 1997
+ Andrew Borodin <aborodin@vmail.ru>, 2009-2022
+
+ This file is part of the Midnight Commander.
+
+ The Midnight Commander 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 3 of the License,
+ or (at your option) any later version.
+
+ The Midnight Commander 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/>.
+ */
+
+/** \file history.c
+ * \brief Source: show history
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <sys/types.h>
+
+#include "lib/global.h"
+
+#include "lib/tty/tty.h" /* LINES, COLS */
+#include "lib/strutil.h"
+#include "lib/widget.h"
+#include "lib/keybind.h" /* CK_* */
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+#define B_VIEW (B_USER + 1)
+#define B_EDIT (B_USER + 2)
+
+/*** file scope type declarations ****************************************************************/
+
+typedef struct
+{
+ int y;
+ int x;
+ size_t count;
+ size_t max_width;
+} history_dlg_data;
+
+/*** forward declarations (file scope functions) *************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static cb_ret_t
+history_dlg_reposition (WDialog * dlg_head)
+{
+ history_dlg_data *data;
+ int x = 0, y, he, wi;
+ WRect r;
+
+ /* guard checks */
+ if (dlg_head == NULL || dlg_head->data.p == NULL)
+ return MSG_NOT_HANDLED;
+
+ data = (history_dlg_data *) dlg_head->data.p;
+
+ y = data->y;
+ he = data->count + 2;
+
+ if (he <= y || y > (LINES - 6))
+ {
+ he = MIN (he, y - 1);
+ y -= he;
+ }
+ else
+ {
+ y++;
+ he = MIN (he, LINES - y);
+ }
+
+ if (data->x > 2)
+ x = data->x - 2;
+
+ wi = data->max_width + 4;
+
+ if ((wi + x) > COLS)
+ {
+ wi = MIN (wi, COLS);
+ x = COLS - wi;
+ }
+
+ rect_init (&r, y, x, he, wi);
+
+ return dlg_default_callback (WIDGET (dlg_head), NULL, MSG_RESIZE, 0, &r);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static cb_ret_t
+history_dlg_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
+{
+ switch (msg)
+ {
+ case MSG_RESIZE:
+ return history_dlg_reposition (DIALOG (w));
+
+ case MSG_NOTIFY:
+ {
+ /* message from listbox */
+ WDialog *d = DIALOG (w);
+
+ switch (parm)
+ {
+ case CK_View:
+ d->ret_value = B_VIEW;
+ break;
+ case CK_Edit:
+ d->ret_value = B_EDIT;
+ break;
+ case CK_Enter:
+ d->ret_value = B_ENTER;
+ break;
+ default:
+ return MSG_NOT_HANDLED;
+ }
+
+ dlg_close (d);
+ return MSG_HANDLED;
+ }
+
+ default:
+ return dlg_default_callback (w, sender, msg, parm, data);
+ }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+history_create_item (history_descriptor_t * hd, void *data)
+{
+ char *text = (char *) data;
+ size_t width;
+
+ width = str_term_width1 (text);
+ hd->max_width = MAX (width, hd->max_width);
+
+ listbox_add_item (hd->listbox, LISTBOX_APPEND_AT_END, 0, text, NULL, TRUE);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void *
+history_release_item (history_descriptor_t * hd, WLEntry * le)
+{
+ void *text;
+
+ (void) hd;
+
+ text = le->text;
+ le->text = NULL;
+
+ return text;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+history_descriptor_init (history_descriptor_t * hd, int y, int x, GList * history, int current)
+{
+ hd->list = history;
+ hd->y = y;
+ hd->x = x;
+ hd->current = current;
+ hd->action = CK_IgnoreKey;
+ hd->text = NULL;
+ hd->max_width = 0;
+ hd->listbox = listbox_new (1, 1, 2, 2, TRUE, NULL);
+ /* in most cases history list contains string only and no any other data */
+ hd->create = history_create_item;
+ hd->release = history_release_item;
+ hd->free = g_free;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+history_show (history_descriptor_t * hd)
+{
+ GList *z, *hi;
+ size_t count;
+ WDialog *query_dlg;
+ history_dlg_data hist_data;
+ int dlg_ret;
+
+ if (hd == NULL || hd->list == NULL)
+ return;
+
+ hd->max_width = str_term_width1 (_("History")) + 2;
+
+ for (z = hd->list; z != NULL; z = g_list_previous (z))
+ hd->create (hd, z->data);
+ /* after this, the order of history items is following: recent at begin, oldest at end */
+
+ count = listbox_get_length (hd->listbox);
+
+ hist_data.y = hd->y;
+ hist_data.x = hd->x;
+ hist_data.count = count;
+ hist_data.max_width = hd->max_width;
+
+ query_dlg =
+ dlg_create (TRUE, 0, 0, 4, 4, WPOS_KEEP_DEFAULT, TRUE, dialog_colors, history_dlg_callback,
+ NULL, "[History-query]", _("History"));
+ query_dlg->data.p = &hist_data;
+
+ /* this call makes list stick to all sides of dialog, effectively make
+ it be resized with dialog */
+ group_add_widget_autopos (GROUP (query_dlg), hd->listbox, WPOS_KEEP_ALL, NULL);
+
+ /* to avoid diplicating of (calculating sizes in two places)
+ code, call history_dlg_callback function here, to set dialog and
+ controls positions.
+ The main idea - create 4x4 dialog and add 2x2 list in
+ center of it, and let dialog function resize it to needed size. */
+ send_message (query_dlg, NULL, MSG_RESIZE, 0, NULL);
+
+ if (WIDGET (query_dlg)->rect.y < hd->y)
+ {
+ /* history is above base widget -- revert order to place recent item at bottom */
+ /* revert history direction */
+ g_queue_reverse (hd->listbox->list);
+ if (hd->current < 0 || (size_t) hd->current >= count)
+ listbox_select_last (hd->listbox);
+ else
+ listbox_set_current (hd->listbox, count - 1 - (size_t) hd->current);
+ }
+ else
+ {
+ /* history is below base widget -- keep order to place recent item on top */
+ if (hd->current > 0)
+ listbox_set_current (hd->listbox, hd->current);
+ }
+
+ dlg_ret = dlg_run (query_dlg);
+ if (dlg_ret != B_CANCEL)
+ {
+ char *q;
+
+ switch (dlg_ret)
+ {
+ case B_EDIT:
+ hd->action = CK_Edit;
+ break;
+ case B_VIEW:
+ hd->action = CK_View;
+ break;
+ default:
+ hd->action = CK_Enter;
+ }
+
+ listbox_get_current (hd->listbox, &q, NULL);
+ hd->text = g_strdup (q);
+ }
+
+ /* get modified history from dialog */
+ z = NULL;
+ for (hi = listbox_get_first_link (hd->listbox); hi != NULL; hi = g_list_next (hi))
+ /* history is being reverted here again */
+ z = g_list_prepend (z, hd->release (hd, LENTRY (hi->data)));
+
+ /* restore history direction */
+ if (WIDGET (query_dlg)->rect.y < hd->y)
+ z = g_list_reverse (z);
+
+ widget_destroy (WIDGET (query_dlg));
+
+ hd->list = g_list_first (hd->list);
+ g_list_free_full (hd->list, hd->free);
+ hd->list = g_list_last (z);
+}
+
+/* --------------------------------------------------------------------------------------------- */