lib/widget/label.c

   1 /*
   2    Widgets for the Midnight Commander
   3
   4    Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
   5    2004, 2005, 2006, 2007, 2009, 2010, 2011
   6    The Free Software Foundation, Inc.
   7
   8    Authors:
   9    Radek Doulik, 1994, 1995
  10    Miguel de Icaza, 1994, 1995
  11    Jakub Jelinek, 1995
  12    Andrej Borsenkow, 1996
  13    Norbert Warmuth, 1997
  14    Andrew Borodin <aborodin@vmail.ru>, 2009, 2010
  15
  16    This file is part of the Midnight Commander.
  17
  18    The Midnight Commander is free software: you can redistribute it
  19    and/or modify it under the terms of the GNU General Public License as
  20    published by the Free Software Foundation, either version 3 of the License,
  21    or (at your option) any later version.
  22
  23    The Midnight Commander is distributed in the hope that it will be useful,
  24    but WITHOUT ANY WARRANTY; without even the implied warranty of
  25    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26    GNU General Public License for more details.
  27
  28    You should have received a copy of the GNU General Public License
  29    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  30  */
  31
  32 /** \file label.c
  33  *  \brief Source: WLabel widget
  34  */
  35
  36 #include <config.h>
  37
  38 #include <stdlib.h>
  39 #include <string.h>
  40
  41 #include "lib/global.h"
  42
  43 #include "lib/tty/tty.h"
  44 #include "lib/tty/color.h"
  45 #include "lib/skin.h"
  46 #include "lib/strutil.h"
  47 #include "lib/widget.h"
  48
  49 /*** global variables ****************************************************************************/
  50
  51 /*** file scope macro definitions ****************************************************************/
  52
  53 /*** file scope type declarations ****************************************************************/
  54
  55 /*** file scope variables ************************************************************************/
  56
  57 /*** file scope functions ************************************************************************/
  58
  59 static cb_ret_t
  60 label_callback (Widget * w, widget_msg_t msg, int parm)
  61 {
  62     WLabel *l = (WLabel *) w;
  63     Dlg_head *h = w->owner;
  64
  65     switch (msg)
  66     {
  67     case WIDGET_INIT:
  68         return MSG_HANDLED;
  69
  70         /* We don't want to get the focus */
  71     case WIDGET_FOCUS:
  72         return MSG_NOT_HANDLED;
  73
  74     case WIDGET_DRAW:
  75         {
  76             char *p = l->text;
  77             int y = 0;
  78             gboolean disabled = (w->options & W_DISABLED) != 0;
  79
  80             if (l->text == NULL)
  81                 return MSG_HANDLED;
  82
  83             if (l->transparent)
  84                 tty_setcolor (disabled ? DISABLED_COLOR : DEFAULT_COLOR);
  85             else
  86                 tty_setcolor (disabled ? DISABLED_COLOR : h->color[DLG_COLOR_NORMAL]);
  87
  88             while (TRUE)
  89             {
  90                 char *q;
  91                 char c = '\0';
  92
  93                 q = strchr (p, '\n');
  94                 if (q != NULL)
  95                 {
  96                     c = q[0];
  97                     q[0] = '\0';
  98                 }
  99
 100                 widget_move (w, y, 0);
 101                 tty_print_string (str_fit_to_term (p, w->cols, J_LEFT));
 102
 103                 if (q == NULL)
 104                     break;
 105
 106                 q[0] = c;
 107                 p = q + 1;
 108                 y++;
 109             }
 110             return MSG_HANDLED;
 111         }
 112
 113     case WIDGET_DESTROY:
 114         g_free (l->text);
 115         return MSG_HANDLED;
 116
 117     default:
 118         return default_proc (msg, parm);
 119     }
 120 }
 121
 122 /* --------------------------------------------------------------------------------------------- */
 123 /*** public functions ****************************************************************************/
 124 /* --------------------------------------------------------------------------------------------- */
 125
 126 WLabel *
 127 label_new (int y, int x, const char *text)
 128 {
 129     WLabel *l;
 130     Widget *w;
 131     int cols = 1;
 132     int lines = 1;
 133
 134     if (text != NULL)
 135         str_msg_term_size (text, &lines, &cols);
 136
 137     l = g_new (WLabel, 1);
 138     w = WIDGET (l);
 139     init_widget (w, y, x, lines, cols, label_callback, NULL);
 140
 141     l->text = g_strdup (text);
 142     l->auto_adjust_cols = TRUE;
 143     l->transparent = FALSE;
 144     widget_want_cursor (w, FALSE);
 145     widget_want_hotkey (w, FALSE);
 146
 147     return l;
 148 }
 149
 150 /* --------------------------------------------------------------------------------------------- */
 151
 152 void
 153 label_set_text (WLabel * label, const char *text)
 154 {
 155     Widget *w = WIDGET (label);
 156     int newcols = w->cols;
 157     int newlines;
 158
 159     if (label->text != NULL && text != NULL && strcmp (label->text, text) == 0)
 160         return;                 /* Flickering is not nice */
 161
 162     g_free (label->text);
 163
 164     if (text == NULL)
 165         label->text = NULL;
 166     else
 167     {
 168         label->text = g_strdup (text);
 169         if (label->auto_adjust_cols)
 170         {
 171             str_msg_term_size (text, &newlines, &newcols);
 172             if (newcols > w->cols)
 173                 w->cols = newcols;
 174             if (newlines > w->lines)
 175                 w->lines = newlines;
 176         }
 177     }
 178
 179     if (w->owner != NULL)
 180         label_callback (w, WIDGET_DRAW, 0);
 181
 182     if (newcols < w->cols)
 183         w->cols = newcols;
 184 }
 185
 186 /* --------------------------------------------------------------------------------------------- */