v4.0.0

[4.0.0] - 2021-07-03

Added

• Add Table::lines, which returns an iterator over all lines of the final table output by dmaahs2017 for #35.
• Add ColumnConstraints::Boundaries{lower: Width, upper: Width} to specify both an upper and a lower boundary.

Fixed

• Fixed percentages sometimes weren't correctly calculated, due to not taking border columns into account.
• Return None for Table::get_table_width, if getting the terminal size somehow failed.
• Fixed a lot of possible, but highly unlikely number conversion overflow issues.
• Run space optimization under all circumstances.
• Percentage constraints with values of >100 will now be capped to 100.
• The MinConstraint would be ignored when:
  • The content was larger than the min constraint
  • There was less space available than specified in the constraint.

Changed

• The way ColumnConstraints are initialized has been changed.
  There is now

enum ColumnConstraints {
    ...,
    /// Enforce a absolute width for a column.
    Absolute(Width),
    /// Specify a lower boundary, either fixed or as percentage of the total width.
    LowerBoundary(Width),
    /// Specify a upper boundary, either fixed or as percentage of the total width.
    UpperBoundary(Width),
}

pub enum Width {
    /// Specify a min amount of characters per line for a column.
    Fixed(u16),
    /// Set a a minimum percentage in respect to table_width for this column.
    /// Values above 100 will be automatically reduced to 100.
    /// **Warning:** This option will be ignored, if the width cannot be determined!
    Percentage(u16),
}

Instead of the old

enum ColumnConstraints {
    ...,
    Width(u16),
    MinWidth(u16),
    MaxWidth(u16),
    Percentage(u16),
    MinPercentage(u16),
    MaxPercentage(u16),
}