1 /*
2 Widgets for the Midnight Commander
3
4 Copyright (C) 1994-2021
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, 2010, 2013
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 label.c
32 * \brief Source: WLabel widget
33 */
34
35 #include <config.h>
36
37 #include <stdarg.h>
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
label_callback(Widget * w,Widget * sender,widget_msg_t msg,int parm,void * data)60 label_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
61 {
62 WLabel *l = LABEL (w);
63
64 switch (msg)
65 {
66 case MSG_DRAW:
67 {
68 char *p = l->text;
69 int y = 0;
70 gboolean disabled;
71 align_crt_t align;
72
73 if (l->text == NULL)
74 return MSG_HANDLED;
75
76 disabled = widget_get_state (w, WST_DISABLED);
77
78 if (l->transparent)
79 tty_setcolor (disabled ? DISABLED_COLOR : DEFAULT_COLOR);
80 else
81 {
82 const int *colors;
83
84 colors = widget_get_colors (w);
85 tty_setcolor (disabled ? DISABLED_COLOR : colors[DLG_COLOR_NORMAL]);
86 }
87
88 align = (w->pos_flags & WPOS_CENTER_HORZ) != 0 ? J_CENTER_LEFT : J_LEFT;
89
90 while (TRUE)
91 {
92 char *q;
93 char c = '\0';
94
95
96 q = strchr (p, '\n');
97 if (q != NULL)
98 {
99 c = q[0];
100 q[0] = '\0';
101 }
102
103 widget_gotoyx (w, y, 0);
104 tty_print_string (str_fit_to_term (p, w->cols, align));
105
106 if (q == NULL)
107 break;
108
109 q[0] = c;
110 p = q + 1;
111 y++;
112 }
113 return MSG_HANDLED;
114 }
115
116 case MSG_DESTROY:
117 g_free (l->text);
118 return MSG_HANDLED;
119
120 default:
121 return widget_default_callback (w, sender, msg, parm, data);
122 }
123 }
124
125 /* --------------------------------------------------------------------------------------------- */
126 /*** public functions ****************************************************************************/
127 /* --------------------------------------------------------------------------------------------- */
128
129 WLabel *
label_new(int y,int x,const char * text)130 label_new (int y, int x, const char *text)
131 {
132 WLabel *l;
133 Widget *w;
134 int cols = 1;
135 int lines = 1;
136
137 if (text != NULL)
138 str_msg_term_size (text, &lines, &cols);
139
140 l = g_new (WLabel, 1);
141 w = WIDGET (l);
142 widget_init (w, y, x, lines, cols, label_callback, NULL);
143
144 l->text = g_strdup (text);
145 l->auto_adjust_cols = TRUE;
146 l->transparent = FALSE;
147
148 return l;
149 }
150
151 /* --------------------------------------------------------------------------------------------- */
152
153 void
label_set_text(WLabel * label,const char * text)154 label_set_text (WLabel * label, const char *text)
155 {
156 Widget *w = WIDGET (label);
157 int newcols = w->cols;
158 int newlines;
159
160 if (label->text != NULL && text != NULL && strcmp (label->text, text) == 0)
161 return; /* Flickering is not nice */
162
163 g_free (label->text);
164
165 if (text == NULL)
166 label->text = NULL;
167 else
168 {
169 label->text = g_strdup (text);
170 if (label->auto_adjust_cols)
171 {
172 str_msg_term_size (text, &newlines, &newcols);
173 if (newcols > w->cols)
174 w->cols = newcols;
175 if (newlines > w->lines)
176 w->lines = newlines;
177 }
178 }
179
180 widget_draw (w);
181
182 if (newcols < w->cols)
183 w->cols = newcols;
184 }
185
186 /* --------------------------------------------------------------------------------------------- */
187
188 void
label_set_textv(WLabel * label,const char * format,...)189 label_set_textv (WLabel * label, const char *format, ...)
190 {
191 va_list args;
192 char buf[BUF_1K]; /* FIXME: is it enough? */
193
194 va_start (args, format);
195 g_vsnprintf (buf, sizeof (buf), format, args);
196 va_end (args);
197
198 label_set_text (label, buf);
199 }
200
201 /* --------------------------------------------------------------------------------------------- */
202