Struct freya_engine::prelude::LineMetrics

pub struct LineMetrics<'a> {

    pub start_index: usize,
    pub end_index: usize,
    pub end_excluding_whitespaces: usize,
    pub end_including_newline: usize,
    pub hard_break: bool,
    pub ascent: f64,
    pub descent: f64,
    pub unscaled_ascent: f64,
    pub height: f64,
    pub width: f64,
    pub left: f64,
    pub baseline: f64,
    pub line_number: usize,
    /* private fields */
}

Fields

start_index: usize

The index in the text buffer the line begins.

end_index: usize

The index in the text buffer the line ends.

end_excluding_whitespaces: usize

end_including_newline: usize

hard_break: bool

ascent: f64

The final computed ascent and descent for the line. This can be impacted by the strut, height, scaling, as well as outlying runs that are very tall.

The top edge is baseline - ascent and the bottom edge is baseline + descent. Ascent and descent are provided as positive numbers. Raw numbers for specific runs of text can be obtained in run_metrics_map. These values are the cumulative metrics for the entire line.

descent: f64

unscaled_ascent: f64

height: f64

Total height of the paragraph including the current line.

The height of the current line is round(ascent + descent).

width: f64

Width of the line.

left: f64

The left edge of the line. The right edge can be obtained with left + width

baseline: f64

The y position of the baseline for this line from the top of the paragraph.

line_number: usize

Zero indexed line number

Implementations

impl<'a> LineMetrics<'a>

pub fn get_style_metrics_count(&self, range: Range<usize>) -> usize

Returns the number of style metrics in the given index range.

pub fn get_style_metrics( &'a self, range: Range<usize> ) -> Vec<(usize, &'a StyleMetrics<'a>)>

Returns indices and references to style metrics in the given range.

Trait Implementations

impl<'a> Clone for LineMetrics<'a>

fn clone(&self) -> LineMetrics<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for LineMetrics<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.