lib/widget/hline.c

   1 /*
   2    Widgets for the Midnight Commander
   3
   4    Copyright (C) 1994-2024
   5    Free Software Foundation, Inc.
   6
   7    Authors:
   8    Radek Doulik, 1994, 1995
   9    Miguel de Icaza, 1994, 1995
  10    Jakub Jelinek, 1995
  11    Andrej Borsenkow, 1996
  12    Norbert Warmuth, 1997
  13    Andrew Borodin <aborodin@vmail.ru>, 2009-2022
  14
  15    This file is part of the Midnight Commander.
  16
  17    The Midnight Commander is free software: you can redistribute it
  18    and/or modify it under the terms of the GNU General Public License as
  19    published by the Free Software Foundation, either version 3 of the License,
  20    or (at your option) any later version.
  21
  22    The Midnight Commander is distributed in the hope that it will be useful,
  23    but WITHOUT ANY WARRANTY; without even the implied warranty of
  24    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25    GNU General Public License for more details.
  26
  27    You should have received a copy of the GNU General Public License
  28    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29  */
  30
  31 /** \file hline.c
  32  *  \brief Source: WHLine widget (horizontal line)
  33  */
  34
  35 #include <config.h>
  36
  37 #include <stdarg.h>
  38 #include <stdlib.h>
  39
  40 #include "lib/global.h"
  41 #include "lib/tty/tty.h"
  42 #include "lib/tty/color.h"
  43 #include "lib/skin.h"
  44 #include "lib/strutil.h"
  45 #include "lib/widget.h"
  46
  47 /*** global variables ****************************************************************************/
  48
  49 /*** file scope macro definitions ****************************************************************/
  50
  51 /*** file scope type declarations ****************************************************************/
  52
  53 /*** forward declarations (file scope functions) *************************************************/
  54
  55 /*** file scope variables ************************************************************************/
  56
  57 /* --------------------------------------------------------------------------------------------- */
  58 /*** file scope functions ************************************************************************/
  59 /* --------------------------------------------------------------------------------------------- */
  60
  61 static void
  62 hline_adjust_cols (WHLine *l)
  63 {
  64     if (l->auto_adjust_cols)
  65     {
  66         Widget *wl = WIDGET (l);
  67         const Widget *o = CONST_WIDGET (wl->owner);
  68         WRect *w = &wl->rect;
  69         const WRect *wo = &o->rect;
  70
  71         if (CONST_DIALOG (o)->compact)
  72         {
  73             w->x = wo->x;
  74             w->cols = wo->cols;
  75         }
  76         else
  77         {
  78             w->x = wo->x + 1;
  79             w->cols = wo->cols - 2;
  80         }
  81     }
  82 }
  83
  84 /* --------------------------------------------------------------------------------------------- */
  85
  86 static cb_ret_t
  87 hline_callback (Widget *w, Widget *sender, widget_msg_t msg, int parm, void *data)
  88 {
  89     WHLine *l = HLINE (w);
  90
  91     switch (msg)
  92     {
  93     case MSG_INIT:
  94         hline_adjust_cols (l);
  95         return MSG_HANDLED;
  96
  97     case MSG_RESIZE:
  98         hline_adjust_cols (l);
  99         w->rect.y = RECT (data)->y;
 100         return MSG_HANDLED;
 101
 102     case MSG_DRAW:
 103         if (l->transparent)
 104             tty_setcolor (DEFAULT_COLOR);
 105         else
 106         {
 107             const int *colors;
 108
 109             colors = widget_get_colors (w);
 110             tty_setcolor (colors[DLG_COLOR_NORMAL]);
 111         }
 112
 113         tty_draw_hline (w->rect.y, w->rect.x + 1, ACS_HLINE, w->rect.cols - 2);
 114
 115         if (l->auto_adjust_cols)
 116         {
 117             widget_gotoyx (w, 0, 0);
 118             tty_print_alt_char (ACS_LTEE, FALSE);
 119             widget_gotoyx (w, 0, w->rect.cols - 1);
 120             tty_print_alt_char (ACS_RTEE, FALSE);
 121         }
 122
 123         if (l->text != NULL)
 124         {
 125             int text_width;
 126
 127             text_width = str_term_width1 (l->text);
 128             widget_gotoyx (w, 0, (w->rect.cols - text_width) / 2);
 129             tty_print_string (l->text);
 130         }
 131         return MSG_HANDLED;
 132
 133     case MSG_DESTROY:
 134         g_free (l->text);
 135         return MSG_HANDLED;
 136
 137     default:
 138         return widget_default_callback (w, sender, msg, parm, data);
 139     }
 140 }
 141
 142 /* --------------------------------------------------------------------------------------------- */
 143 /*** public functions ****************************************************************************/
 144 /* --------------------------------------------------------------------------------------------- */
 145
 146 WHLine *
 147 hline_new (int y, int x, int width)
 148 {
 149     WRect r = { y, x, 1, width };
 150     WHLine *l;
 151     Widget *w;
 152
 153     l = g_new (WHLine, 1);
 154     w = WIDGET (l);
 155     r.cols = width < 0 ? 1 : width;
 156     widget_init (w, &r, hline_callback, NULL);
 157     l->text = NULL;
 158     l->auto_adjust_cols = (width < 0);
 159     l->transparent = FALSE;
 160
 161     return l;
 162 }
 163
 164 /* --------------------------------------------------------------------------------------------- */
 165
 166 void
 167 hline_set_text (WHLine *l, const char *text)
 168 {
 169     g_free (l->text);
 170
 171     if (text == NULL || *text == '\0')
 172         l->text = NULL;
 173     else
 174         l->text = g_strdup (text);
 175
 176     widget_draw (WIDGET (l));
 177 }
 178
 179 /* --------------------------------------------------------------------------------------------- */
 180
 181 void
 182 hline_set_textv (WHLine *l, const char *format, ...)
 183 {
 184     va_list args;
 185     char buf[BUF_1K];           /* FIXME: is it enough? */
 186
 187     va_start (args, format);
 188     g_vsnprintf (buf, sizeof (buf), format, args);
 189     va_end (args);
 190
 191     hline_set_text (l, buf);
 192 }
 193
 194 /* --------------------------------------------------------------------------------------------- */