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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 buttonbar.c
+ * \brief Source: WButtonBar widget
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "lib/global.h"
+
+#include "lib/tty/tty.h"
+#include "lib/tty/key.h" /* XCTRL and ALT macros */
+#include "lib/skin.h"
+#include "lib/strutil.h"
+#include "lib/util.h"
+#include "lib/widget.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** forward declarations (file scope functions) *************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+/* calculate positions of buttons; width is never less than 7 */
+static void
+buttonbar_init_button_positions (WButtonBar * bb)
+{
+ int i;
+ int pos = 0;
+
+ if (COLS < BUTTONBAR_LABELS_NUM * 7)
+ {
+ for (i = 0; i < BUTTONBAR_LABELS_NUM; i++)
+ {
+ if (pos + 7 <= COLS)
+ pos += 7;
+
+ bb->labels[i].end_coord = pos;
+ }
+ }
+ else
+ {
+ /* Distribute the extra width in a way that the middle vertical line
+ (between F5 and F6) aligns with the two panels. The extra width
+ is distributed in this order: F10, F5, F9, F4, ..., F6, F1. */
+ int dv, md;
+
+ dv = COLS / BUTTONBAR_LABELS_NUM;
+ md = COLS % BUTTONBAR_LABELS_NUM;
+
+ for (i = 0; i < BUTTONBAR_LABELS_NUM / 2; i++)
+ {
+ pos += dv;
+ if (BUTTONBAR_LABELS_NUM / 2 - 1 - i < md / 2)
+ pos++;
+
+ bb->labels[i].end_coord = pos;
+ }
+
+ for (; i < BUTTONBAR_LABELS_NUM; i++)
+ {
+ pos += dv;
+ if (BUTTONBAR_LABELS_NUM - 1 - i < (md + 1) / 2)
+ pos++;
+
+ bb->labels[i].end_coord = pos;
+ }
+ }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/* return width of one button */
+static int
+buttonbar_get_button_width (const WButtonBar * bb, int i)
+{
+ if (i == 0)
+ return bb->labels[0].end_coord;
+ return bb->labels[i].end_coord - bb->labels[i - 1].end_coord;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+buttonbar_get_button_by_x_coord (const WButtonBar * bb, int x)
+{
+ int i;
+
+ for (i = 0; i < BUTTONBAR_LABELS_NUM; i++)
+ if (bb->labels[i].end_coord > x)
+ return i;
+
+ return (-1);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+set_label_text (WButtonBar * bb, int idx, const char *text)
+{
+ g_free (bb->labels[idx - 1].text);
+ bb->labels[idx - 1].text = g_strdup (text);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/* returns TRUE if a function has been called, FALSE otherwise. */
+static gboolean
+buttonbar_call (WButtonBar * bb, int i)
+{
+ cb_ret_t ret = MSG_NOT_HANDLED;
+ Widget *w = WIDGET (bb);
+ Widget *target;
+
+ if ((bb != NULL) && (bb->labels[i].command != CK_IgnoreKey))
+ {
+ target = (bb->labels[i].receiver != NULL) ? bb->labels[i].receiver : WIDGET (w->owner);
+ ret = send_message (target, w, MSG_ACTION, bb->labels[i].command, NULL);
+ }
+ return ret;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static cb_ret_t
+buttonbar_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
+{
+ WButtonBar *bb = BUTTONBAR (w);
+ int i;
+
+ switch (msg)
+ {
+ case MSG_HOTKEY:
+ for (i = 0; i < BUTTONBAR_LABELS_NUM; i++)
+ if (parm == KEY_F (i + 1) && buttonbar_call (bb, i))
+ return MSG_HANDLED;
+ return MSG_NOT_HANDLED;
+
+ case MSG_DRAW:
+ if (widget_get_state (w, WST_VISIBLE))
+ {
+ buttonbar_init_button_positions (bb);
+ widget_gotoyx (w, 0, 0);
+ tty_setcolor (DEFAULT_COLOR);
+ tty_printf ("%-*s", w->rect.cols, "");
+ widget_gotoyx (w, 0, 0);
+
+ for (i = 0; i < BUTTONBAR_LABELS_NUM; i++)
+ {
+ int width;
+ const char *text;
+
+ width = buttonbar_get_button_width (bb, i);
+ if (width <= 0)
+ break;
+
+ tty_setcolor (BUTTONBAR_HOTKEY_COLOR);
+ tty_printf ("%2d", i + 1);
+
+ tty_setcolor (BUTTONBAR_BUTTON_COLOR);
+ text = (bb->labels[i].text != NULL) ? bb->labels[i].text : "";
+ tty_print_string (str_fit_to_term (text, width - 2, J_LEFT_FIT));
+ }
+ }
+ return MSG_HANDLED;
+
+ case MSG_DESTROY:
+ for (i = 0; i < BUTTONBAR_LABELS_NUM; i++)
+ g_free (bb->labels[i].text);
+ return MSG_HANDLED;
+
+ default:
+ return widget_default_callback (w, sender, msg, parm, data);
+ }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+buttonbar_mouse_callback (Widget * w, mouse_msg_t msg, mouse_event_t * event)
+{
+ switch (msg)
+ {
+ case MSG_MOUSE_CLICK:
+ {
+ WButtonBar *bb = BUTTONBAR (w);
+ int button;
+
+ button = buttonbar_get_button_by_x_coord (bb, event->x);
+ if (button >= 0)
+ buttonbar_call (bb, button);
+ break;
+ }
+
+ default:
+ break;
+ }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+WButtonBar *
+buttonbar_new (void)
+{
+ WRect r = { LINES - 1, 0, 1, COLS };
+ WButtonBar *bb;
+ Widget *w;
+
+ bb = g_new0 (WButtonBar, 1);
+ w = WIDGET (bb);
+ widget_init (w, &r, buttonbar_callback, buttonbar_mouse_callback);
+
+ w->pos_flags = WPOS_KEEP_HORZ | WPOS_KEEP_BOTTOM;
+ w->options |= WOP_WANT_HOTKEY;
+
+ return bb;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+buttonbar_set_label (WButtonBar * bb, int idx, const char *text, const global_keymap_t * keymap,
+ Widget * receiver)
+{
+ if ((bb != NULL) && (idx >= 1) && (idx <= BUTTONBAR_LABELS_NUM))
+ {
+ long command = CK_IgnoreKey;
+
+ if (keymap != NULL)
+ command = keybind_lookup_keymap_command (keymap, KEY_F (idx));
+
+ if ((text == NULL) || (text[0] == '\0'))
+ set_label_text (bb, idx, "");
+ else
+ set_label_text (bb, idx, text);
+
+ bb->labels[idx - 1].command = command;
+ bb->labels[idx - 1].receiver = WIDGET (receiver);
+ }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/* Find ButtonBar widget in the dialog */
+WButtonBar *
+buttonbar_find (const WDialog * h)
+{
+ return BUTTONBAR (widget_find_by_type (CONST_WIDGET (h), buttonbar_callback));
+}
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