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
160
161
162
163
164
165
166

/// A color.
#[derive(Debug)]
pub struct Color {
    pub red: u8,
    pub green: u8,
    pub blue: u8,
    pub alpha: u8
}

impl Color {
    /// Create a color with a alpha value of 255
    pub fn new(red: u8, green: u8, blue: u8) -> Color {
        Color {
            red,
            green,
            blue,
            alpha: 255
        }
    }

    /// Create a color
    pub fn new_with_alpha(red: u8, green: u8, blue: u8, alpha: u8) -> Color {
        Color {
            red,
            green,
            blue,
            alpha
        }
    }

    /// Green color
    pub fn green() -> Color {
        Color {
            red: 0,
            green: 128,
            blue: 0,
            alpha: 255
        }
    }

    /// Yellow color
    pub fn yellow() -> Color {
        Color {
            red: 255,
            green: 255,
            blue: 0,
            alpha: 255
        }
    }

    /// Orange color
    pub fn orange() -> Color {
        Color {
            red: 255,
            green: 165,
            blue: 0,
            alpha: 255
        }
    }

    /// Red color
    pub fn red() -> Color {
        Color {
            red: 255,
            green: 0,
            blue: 0,
            alpha: 255
        }
    }

    /// Blue color
    pub fn blue() -> Color {
        Color {
            red: 0,
            green: 0,
            blue: 255,
            alpha: 255
        }
    }

    /// Cyan color
    pub fn cyan() -> Color {
        Color {
            red: 0,
            green: 255,
            blue: 255,
            alpha: 255
        }
    }

    /// Grey color
    pub fn grey() -> Color {
        Color {
            red: 128,
            green: 128,
            blue: 128,
            alpha: 255
        }
    }

    /// Pink color
    pub fn pink() -> Color {
        Color {
            red: 255,
            green: 192,
            blue: 203,
            alpha: 255
        }
    }

    /// Purple color
    pub fn purple() -> Color {
        Color {
            red: 128,
            green: 0,
            blue: 128,
            alpha: 255
        }
    }

    /// No color
    pub fn black() -> Color {
        Color {
            red: 0,
            green: 0,
            blue: 0,
            alpha: 255
        }
    }

    /// Pure white
    pub fn white() -> Color {
        Color {
            red: 255,
            green: 255,
            blue: 255,
            alpha: 255
        }
    }
}

impl ToString for Color {
    fn to_string(&self) -> String {
        let mut color = String::from("rgba(");
        color.push_str(&self.red.to_string());
        color.push_str(",");
        color.push_str(&self.green.to_string());
        color.push_str(",");
        color.push_str(&self.blue.to_string());
        color.push_str(",");
        color.push_str(&(self.alpha as f64 / 255.0).to_string());
        color.push_str(")");

        color
    }
}

#[cfg(test)]
mod test {
    #[test]
    fn color_to_string() {
        use super::Color;

        assert_eq!(&Color::purple().to_string(), "rgba(128,0,128,1)");
    }
}