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

use ansistr::{TextAlign, repaire_str, trucate_str, wrap_str, pad_str};

/// Column structure which represents a formatted column in a row.
#[derive(Debug, Clone, PartialEq)]
pub struct Column {
    width: Option<usize>,
    text: Option<String>,
    text_width: Option<usize>,
    text_align: Option<TextAlign>,
    text_tail: Option<String>,
    text_pad: Option<String>,
}

/// Style structure implementation.
impl Column {

    /// Returns new instance.
    pub fn new() -> Self {
        Self {
            width: None,
            text: None,
            text_width: None,
            text_align: None,
            text_tail: None,
            text_pad: None,
        }
    }

    /// Returns new instance.
    pub fn from_str<S: Into<String>>(txt: S) -> Self {
        Self {
            width: None,
            text: Some(txt.into()),
            text_width: None,
            text_align: None,
            text_tail: None,
            text_pad: None,
        }
    }

    /// Returns column width.
    pub fn width(&self) -> &Option<usize> {
        &self.width
    }

    /// Returns column width.
    pub fn text(&self) -> &Option<String> {
        &self.text
    }
    
    /// Returns text width
    pub fn text_width(&self) -> &Option<usize> {
        &self.text_width
    }

    /// Returns text width
    pub fn text_align(&self) -> &TextAlign {
        match &self.text_align {
            Some(t) => t,
            None => &TextAlign::Left,
        }
    }

    /// Returns truncation tail string.
    pub fn text_tail(&self) -> &str {
        match &self.text_tail {
            Some(t) => t,
            None => "...",
        }
    }

    /// Returns text pad character.
    pub fn text_pad(&self) -> &str {
        match &self.text_pad {
            Some(t) => t,
            None => &" ",
        }
    }

    /// Sets column width.
    pub fn set_width(mut self, width: usize) -> Self {
        self.width = Some(width);
        self
    }

    /// Sets column text.
    pub fn set_text<S: Into<String>>(mut self, text: S) -> Self {
        self.text = Some(text.into());
        self
    }
    
    /// Sets column text width.
    pub fn set_text_width(mut self, width: usize) -> Self {
        self.text_width = Some(width);
        self
    }

    /// Sets column text alignement.
    pub fn set_text_align(mut self, align: TextAlign) -> Self {
        self.text_align = Some(align);
        self
    }

    /// Sets text truncation tail string.
    pub fn set_text_tail<S: Into<String>>(mut self, tail: S) -> Self {
        self.text_tail = Some(tail.into());
        self
    }

    /// Sets text pad character.
    pub fn set_text_pad<S: Into<String>>(mut self, pad: S) -> Self {
        self.text_pad = Some(pad.into());
        self
    }

    /// Returns a formatted column content as multiline string.
    pub fn to_string(&self) -> String {
        let mut text = match &self.text {
            Some(t) => t.to_string(),
            None => return "".to_string(),
        };
        if self.text_width.is_some() {
            text = trucate_str(text, self.text_width.unwrap(), self.text_align(), self.text_tail());
        }
        let text = if self.width.is_some() {
            let width = self.width.unwrap();
            wrap_str(text, width)
                .split("\n")
                .map(|r| pad_str(r, width, self.text_align(), self.text_pad()))
                .collect::<Vec<String>>()
                .join("\n")
        } else {
            text
        };
        format!("{}\n", repaire_str(text))
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn builds_multiline_string() {
        let column = Column::new()
            .set_text("Allocating memory \x1B[31mis actually quite fast, and regardless you’re going to be copying the entire\x1B[39m string around.")
            .set_width(30)
            .set_text_width(72)
            .set_text_align(TextAlign::Center)
            .set_text_tail("+++")
            .set_text_pad("!");
        assert_eq!(column.to_string(), [
            "Allocating memory \u{1b}[31mis actually!\u{1b}[39m\n",
            "\u{1b}[31m!quit+++be copying the entire\u{1b}[39m!\n",
            "!!!!!!!!!string aroun!!!!!!!!!\n",
        ].join(""));
    }
}