mtots 0.1.2

The mtots scripting language
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159

use super::*;

pub struct Color(ggez::graphics::Color);

impl From<ggez::graphics::Color> for Color {
    fn from(c: ggez::graphics::Color) -> Self {
        Self(c)
    }
}

impl From<Color> for ggez::graphics::Color {
    fn from(c: Color) -> Self {
        c.0
    }
}

impl TryFrom<Value> for Color {
    type Error = Error;
    fn try_from(value: Value) -> Result<Color> {
        match &value {
            Value::List(list) if list.borrow().len() == 3 => {
                let [r, g, b] = <[f32; 3]>::try_from(value)?;
                Ok(Color((r, g, b).into()))
            }
            _ => {
                let [r, g, b, a] = <[f32; 4]>::try_from(value)?;
                Ok(Color((r, g, b, a).into()))
            }
        }
    }
}

impl TryFrom<&Value> for Color {
    type Error = Error;
    fn try_from(value: &Value) -> Result<Color> {
        TryFrom::try_from(value.clone())
    }
}

#[derive(Clone)]
pub struct Text(ggez::graphics::Text);

impl Text {
    pub fn get(&self) -> &ggez::graphics::Text {
        &self.0
    }
}

impl ConvertValue for Text {
    fn convert(globals: &mut Globals, value: &Value) -> Result<Text> {
        let mut fragments = Vec::new();
        to_fragments(globals, value, &mut fragments)?;
        let mut text = ggez::graphics::Text::default();
        for fragment in fragments {
            text.add(fragment);
        }
        Ok(text.into())
    }
}

fn to_fragments(
    globals: &mut Globals,
    value: &Value,
    out: &mut Vec<ggez::graphics::TextFragment>,
) -> Result<()> {
    match value {
        Value::List(list) => {
            for x in list.borrow().iter() {
                to_fragments(globals, x, out)?;
            }
        }
        _ => out.push(value.clone().convert::<TextFragment>(globals)?.into()),
    }
    Ok(())
}

impl From<ggez::graphics::Text> for Text {
    fn from(x: ggez::graphics::Text) -> Self {
        Self(x)
    }
}

impl From<Text> for ggez::graphics::Text {
    fn from(x: Text) -> Self {
        x.0
    }
}

#[derive(Clone)]
pub struct TextFragment(ggez::graphics::TextFragment);

impl TextFragment {
    pub fn get(&self) -> &ggez::graphics::TextFragment {
        &self.0
    }
}

impl From<TextFragment> for ggez::graphics::TextFragment {
    fn from(x: TextFragment) -> Self {
        x.0
    }
}

impl From<ggez::graphics::TextFragment> for TextFragment {
    fn from(x: ggez::graphics::TextFragment) -> Self {
        Self(x)
    }
}

impl ConvertValue for TextFragment {
    fn convert(globals: &mut Globals, value: &Value) -> Result<TextFragment> {
        match value {
            Value::String(string) => Ok(TextFragment(ggez::graphics::TextFragment::new(
                string.str(),
            ))),
            Value::Map(map) => {
                let mut map = map.to_string_keys()?;
                let mut frag = ggez::graphics::TextFragment::default();
                if let Some(textval) = map.remove("text") {
                    frag.text = textval.into_string()?.unwrap_or_clone();
                }
                if let Some(colorval) = map.remove("color") {
                    frag.color = Some(Color::try_from(colorval)?.into());
                }
                if let Some(scaleval) = map.remove("scale") {
                    let fontscale = scaleval.f32()?;
                    frag.scale = Some(ggez::graphics::Scale::uniform(fontscale));
                }
                if let Some(fontval) = map.remove("font") {
                    let font = fontval.convert::<Font>(globals)?;
                    frag.font = Some(font.into());
                }
                if !map.is_empty() {
                    let keys: Vec<_> = map.keys().collect();
                    return Err(rterr!("Unused fragment attributes: {:?}", keys));
                }
                Ok(TextFragment::from(frag))
            }
            _ => Err(rterr!("Expected TextFragment")),
        }
    }
}

#[derive(Clone)]
pub struct Font(ggez::graphics::Font);

impl From<ggez::graphics::Font> for Font {
    fn from(font: ggez::graphics::Font) -> Self {
        Self(font)
    }
}

impl From<Font> for ggez::graphics::Font {
    fn from(font: Font) -> Self {
        font.0
    }
}

impl ConvertValue for Font {}