lib/widget/label.c

   1 /* Widgets for the Midnight Commander
   2
   3    Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
   4    2004, 2005, 2006, 2007, 2009, 2010 Free Software Foundation, Inc.
   5
   6    Authors: 1994, 1995 Radek Doulik
   7    1994, 1995 Miguel de Icaza
   8    1995 Jakub Jelinek
   9    1996 Andrej Borsenkow
  10    1997 Norbert Warmuth
  11    2009, 2010 Andrew Borodin
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 2 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  26
  27  */
  28
  29 /** \file label.c
  30  *  \brief Source: WLabel widget
  31  */
  32
  33 #include <config.h>
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #include "lib/global.h"
  39
  40 #include "lib/tty/tty.h"
  41 #include "lib/tty/color.h"
  42 #include "lib/skin.h"
  43 #include "lib/strutil.h"
  44 #include "lib/widget.h"
  45
  46 /*** global variables ****************************************************************************/
  47
  48 /*** file scope macro definitions ****************************************************************/
  49
  50 /*** file scope type declarations ****************************************************************/
  51
  52 /*** file scope variables ************************************************************************/
  53
  54 /*** file scope functions ************************************************************************/
  55
  56 static cb_ret_t
  57 label_callback (Widget * w, widget_msg_t msg, int parm)
  58 {
  59     WLabel *l = (WLabel *) w;
  60     Dlg_head *h = l->widget.owner;
  61
  62     switch (msg)
  63     {
  64     case WIDGET_INIT:
  65         return MSG_HANDLED;
  66
  67         /* We don't want to get the focus */
  68     case WIDGET_FOCUS:
  69         return MSG_NOT_HANDLED;
  70
  71     case WIDGET_DRAW:
  72         {
  73             char *p = l->text;
  74             int y = 0;
  75             gboolean disabled = (w->options & W_DISABLED) != 0;
  76
  77             if (l->text == NULL)
  78                 return MSG_HANDLED;
  79
  80             if (l->transparent)
  81                 tty_setcolor (disabled ? DISABLED_COLOR : DEFAULT_COLOR);
  82             else
  83                 tty_setcolor (disabled ? DISABLED_COLOR : h->color[DLG_COLOR_NORMAL]);
  84
  85             while (TRUE)
  86             {
  87                 char *q;
  88                 char c = '\0';
  89
  90                 q = strchr (p, '\n');
  91                 if (q != NULL)
  92                 {
  93                     c = q[0];
  94                     q[0] = '\0';
  95                 }
  96
  97                 widget_move (&l->widget, y, 0);
  98                 tty_print_string (str_fit_to_term (p, l->widget.cols, J_LEFT));
  99
 100                 if (q == NULL)
 101                     break;
 102
 103                 q[0] = c;
 104                 p = q + 1;
 105                 y++;
 106             }
 107             return MSG_HANDLED;
 108         }
 109
 110     case WIDGET_DESTROY:
 111         g_free (l->text);
 112         return MSG_HANDLED;
 113
 114     default:
 115         return default_proc (msg, parm);
 116     }
 117 }
 118
 119 /* --------------------------------------------------------------------------------------------- */
 120 /*** public functions ****************************************************************************/
 121 /* --------------------------------------------------------------------------------------------- */
 122
 123 WLabel *
 124 label_new (int y, int x, const char *text)
 125 {
 126     WLabel *l;
 127     int cols = 1;
 128     int lines = 1;
 129
 130     if (text != NULL)
 131         str_msg_term_size (text, &lines, &cols);
 132
 133     l = g_new (WLabel, 1);
 134     init_widget (&l->widget, y, x, lines, cols, label_callback, NULL);
 135     l->text = g_strdup (text);
 136     l->auto_adjust_cols = TRUE;
 137     l->transparent = FALSE;
 138     widget_want_cursor (l->widget, FALSE);
 139     widget_want_hotkey (l->widget, FALSE);
 140
 141     return l;
 142 }
 143
 144 /* --------------------------------------------------------------------------------------------- */
 145
 146 void
 147 label_set_text (WLabel * label, const char *text)
 148 {
 149     int newcols = label->widget.cols;
 150     int newlines;
 151
 152     if (label->text != NULL && text != NULL && strcmp (label->text, text) == 0)
 153         return;                 /* Flickering is not nice */
 154
 155     g_free (label->text);
 156
 157     if (text == NULL)
 158         label->text = NULL;
 159     else
 160     {
 161         label->text = g_strdup (text);
 162         if (label->auto_adjust_cols)
 163         {
 164             str_msg_term_size (text, &newlines, &newcols);
 165             if (newcols > label->widget.cols)
 166                 label->widget.cols = newcols;
 167             if (newlines > label->widget.lines)
 168                 label->widget.lines = newlines;
 169         }
 170     }
 171
 172     if (label->widget.owner != NULL)
 173         label_callback ((Widget *) label, WIDGET_DRAW, 0);
 174
 175     if (newcols < label->widget.cols)
 176         label->widget.cols = newcols;
 177 }
 178
 179 /* --------------------------------------------------------------------------------------------- */