styles source code

1 /**
2  * Styles demo for Dcell.
3  *
4  * Copyright: Copyright 2025 Garrett D'Amore
5  * Authors: Garrett D'Amore
6  * License:
7  *   Distributed under the Boost Software License, Version 1.0.
8  *   (See accompanying file LICENSE or https://www.boost.org/LICENSE_1_0.txt)
9  *   SPDX-License-Identifier: BSL-1.0
10  */
11 module styles;
12 
13 import std.string;
14 
15 import dcell;
16 
17 void centerStr(Screen s, int y, Style style, string str)
18 {
19     s.style = style;
20     s.position = Coord((s.size.x - cast(int)(str.length)) / 2, y);
21     s.write(str);
22 }
23 
24 void displayStyles(Screen s)
25 {
26 
27     s.style.attr = Attr.bold;
28     s.style.fg = Color.black;
29     s.style.bg = Color.white;
30 
31     s.clear();
32 
33     s.style.fg = Color.blue;
34     s.style.bg = Color.silver;
35 
36     int row = 2;
37     s.position = Coord(2, row);
38     s.write("Press ESC to Exit");
39     row += 2;
40 
41     s.style.fg = Color.black;
42     s.style.bg = Color.white;
43 
44     s.position = Coord(2, row);
45     s.style.attr = Attr.none;
46     s.write("Note: Style support is dependent on your terminal.");
47     row += 2;
48 
49     s.style.attr = Attr.none;
50     s.position = Coord(2, row++);
51     s.write("Plain");
52 
53     s.style.attr = Attr.blink;
54     s.position = Coord(2, row++);
55     s.write("Blink");
56 
57     s.style.attr = Attr.reverse;
58     s.position = Coord(2, row++);
59     s.write("Reverse");
60 
61     s.style.attr = Attr.dim;
62     s.position = Coord(2, row++);
63     s.write("Dim");
64 
65     s.style.attr = Attr.underline;
66     s.position = Coord(2, row++);
67     s.write("Underline");
68 
69     s.style.attr = Attr.italic;
70     s.position = Coord(2, row++);
71     s.write("Italic");
72 
73     s.style.attr = Attr.bold;
74     s.position = Coord(2, row++);
75     s.write("Bold");
76 
77     s.style.attr = Attr.bold | Attr.italic;
78     s.position = Coord(2, row++);
79     s.write("Bold Italic");
80 
81     s.style.attr = Attr.bold | Attr.italic | Attr.underline;
82     s.position = Coord(2, row++);
83     s.write("Bold Italic Underline");
84 
85     s.style.attr = Attr.strikethrough;
86     s.position = Coord(2, row++);
87     s.write("Strikethrough");
88 
89     s.style.attr = Attr.doubleUnderline;
90     s.position = Coord(2, row++);
91     s.write("Double Underline");
92 
93     s.style.attr = Attr.curlyUnderline;
94     s.position = Coord(2, row++);
95     s.write("Curly Underline");
96 
97     s.style.attr = Attr.dottedUnderline;
98     s.position = Coord(2, row++);
99     s.write("Dotted Underline");
100 
101     s.style.attr = Attr.dashedUnderline;
102     s.position = Coord(2, row++);
103     s.write("Dashed Underline");
104 
105     s.style.attr = Attr.underline;
106     s.style.ul = Color.blue;
107     s.position = Coord(2, row++);
108     s.write("Blue Underline");
109 
110     s.style.attr = Attr.curlyUnderline;
111     s.style.ul = fromHex(0xc58af9);
112     s.position = Coord(2, row++);
113     s.write("Lavender Curly Underline");
114 
115     s.style.attr = Attr.none;
116     s.style.ul = Color.invalid;
117     s.position = Coord(2, row++);
118     s.style.url = "https://github.com/gdamore/dcell";
119     s.write("Hyperlink");
120     s.style.url = "";
121 
122     s.style.attr = Attr.none;
123     s.style.fg = Color.red;
124     s.position = Coord(2, row++);
125     s.write("Red Foreground");
126 
127     s.style.attr = Attr.none;
128     s.style.bg = Color.red;
129     s.style.fg = Color.black;
130     s.position = Coord(2, row++);
131     s.write("Red Background");
132 
133     s.show();
134 }
135 
136 void handleEvent(Screen ts, Event ev)
137 {
138     import core.stdc.stdlib : exit;
139 
140     switch (ev.type)
141     {
142     case EventType.key:
143         if (ev.key.key == Key.esc || ev.key.key == Key.f1)
144         {
145             ts.stop();
146             exit(0);
147         }
148         break;
149     case EventType.resize:
150         ts.resize();
151         displayStyles(ts);
152         ts.sync();
153         break;
154     default:
155         break;
156     }
157 }
158 
159 void main()
160 {
161     auto ts = newScreen();
162     assert(ts !is null);
163     scope (exit)
164     {
165         ts.stop();
166     }
167 
168     ts.start();
169 
170     displayStyles(ts);
171     for (;;)
172     {
173         ts.waitForEvent();
174         foreach (ev; ts.events())
175         {
176             handleEvent(ts, ev);
177         }
178     }
179 }