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use crate::{
alignment::{HorizontalTextAlignment, VerticalTextAlignment},
rendering::cursor::Cursor,
style::height_mode::HeightMode,
StyledTextBox,
};
use embedded_graphics::prelude::*;
#[derive(Copy, Clone, Debug)]
pub struct BottomAligned;
impl VerticalTextAlignment for BottomAligned {
#[inline]
fn apply_vertical_alignment<'a, C, F, A, H>(
cursor: &mut Cursor<F>,
styled_text_box: &'a StyledTextBox<'a, C, F, A, Self, H>,
) where
C: PixelColor,
F: Font + Copy,
A: HorizontalTextAlignment,
H: HeightMode,
{
let text_height = styled_text_box
.style
.measure_text_height(styled_text_box.text_box.text, cursor.line_width())
as i32;
let box_height = styled_text_box.size().height as i32;
let offset = box_height - text_height;
cursor.position.y += offset
}
}
#[cfg(test)]
mod test {
use embedded_graphics::{
fonts::Font6x8, mock_display::MockDisplay, pixelcolor::BinaryColor, prelude::*,
primitives::Rectangle,
};
use crate::{
alignment::BottomAligned, style::height_mode::Exact, style::vertical_overdraw::Visible,
style::TextBoxStyleBuilder, TextBox,
};
#[test]
fn test_bottom_alignment() {
let mut display = MockDisplay::new();
let style = TextBoxStyleBuilder::new(Font6x8)
.vertical_alignment(BottomAligned)
.text_color(BinaryColor::On)
.background_color(BinaryColor::Off)
.build();
TextBox::new("word", Rectangle::new(Point::zero(), Point::new(54, 15)))
.into_styled(style)
.draw(&mut display)
.unwrap();
assert_eq!(
display,
MockDisplay::from_pattern(&[
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
"......................#.",
"......................#.",
"#...#..###..#.##...##.#.",
"#...#.#...#.##..#.#..##.",
"#.#.#.#...#.#.....#...#.",
"#.#.#.#...#.#.....#...#.",
".#.#...###..#......####.",
"........................",
])
);
}
#[test]
fn test_bottom_alignment_tall_text() {
let mut display = MockDisplay::new();
let style = TextBoxStyleBuilder::new(Font6x8)
.vertical_alignment(BottomAligned)
.text_color(BinaryColor::On)
.background_color(BinaryColor::Off)
.build();
TextBox::new(
"word1 word2 word3 word4",
Rectangle::new(Point::zero(), Point::new(30, 15)),
)
.into_styled(style)
.draw(&mut display)
.unwrap();
assert_eq!(
display,
MockDisplay::from_pattern(&[
"......................#..###..",
"......................#.#...#.",
"#...#..###..#.##...##.#.....#.",
"#...#.#...#.##..#.#..##...##..",
"#.#.#.#...#.#.....#...#.....#.",
"#.#.#.#...#.#.....#...#.#...#.",
".#.#...###..#......####..###..",
"..............................",
"......................#....#..",
"......................#...##..",
"#...#..###..#.##...##.#..#.#..",
"#...#.#...#.##..#.#..##.#..#..",
"#.#.#.#...#.#.....#...#.#####.",
"#.#.#.#...#.#.....#...#....#..",
".#.#...###..#......####....#..",
"..............................",
])
);
}
#[test]
fn test_bottom_alignment_tall_text_with_line_spacing() {
let mut display = MockDisplay::new();
let style = TextBoxStyleBuilder::new(Font6x8)
.vertical_alignment(BottomAligned)
.text_color(BinaryColor::On)
.background_color(BinaryColor::Off)
.height_mode(Exact(Visible))
.line_spacing(2)
.build();
TextBox::new(
"word1 word2 word3 word4",
Rectangle::new(Point::zero(), Point::new(30, 15)),
)
.into_styled(style)
.draw(&mut display)
.unwrap();
assert_eq!(
display,
MockDisplay::from_pattern(&[
"#...#..###..#.##...##.#.....#.",
"#...#.#...#.##..#.#..##...##..",
"#.#.#.#...#.#.....#...#.....#.",
"#.#.#.#...#.#.....#...#.#...#.",
".#.#...###..#......####..###..",
"..............................",
" ",
" ",
"......................#....#..",
"......................#...##..",
"#...#..###..#.##...##.#..#.#..",
"#...#.#...#.##..#.#..##.#..#..",
"#.#.#.#...#.#.....#...#.#####.",
"#.#.#.#...#.#.....#...#....#..",
".#.#...###..#......####....#..",
"..............................",
])
);
}
}