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mod reflow;
mod scrollbar;
mod scrolllist;
mod stateful_paragraph;
pub mod style;
mod syntax_text;
use filetreelist::MoveSelection;
pub use scrollbar::draw_scrollbar;
pub use scrolllist::{draw_list, draw_list_block};
pub use stateful_paragraph::{
ParagraphState, ScrollPos, StatefulParagraph,
};
pub use syntax_text::{AsyncSyntaxJob, SyntaxText};
use tui::layout::{Constraint, Direction, Layout, Rect};
use crate::keys::SharedKeyConfig;
/// return the scroll position (line) necessary to have the `selection` in view if it is not already
pub const fn calc_scroll_top(
current_top: usize,
height_in_lines: usize,
selection: usize,
) -> usize {
if current_top + height_in_lines <= selection {
selection.saturating_sub(height_in_lines) + 1
} else if current_top > selection {
selection
} else {
current_top
}
}
/// ui component size representation
#[derive(Copy, Clone)]
pub struct Size {
pub width: u16,
pub height: u16,
}
impl Size {
pub const fn new(width: u16, height: u16) -> Self {
Self { width, height }
}
}
impl From<Rect> for Size {
fn from(r: Rect) -> Self {
Self {
width: r.width,
height: r.height,
}
}
}
/// use layouts to create a rects that
/// centers inside `r` and sizes `percent_x`/`percent_x` of `r`
pub fn centered_rect(
percent_x: u16,
percent_y: u16,
r: Rect,
) -> Rect {
let popup_layout = Layout::default()
.direction(Direction::Vertical)
.constraints(
[
Constraint::Percentage((100 - percent_y) / 2),
Constraint::Percentage(percent_y),
Constraint::Percentage((100 - percent_y) / 2),
]
.as_ref(),
)
.split(r);
Layout::default()
.direction(Direction::Horizontal)
.constraints(
[
Constraint::Percentage((100 - percent_x) / 2),
Constraint::Percentage(percent_x),
Constraint::Percentage((100 - percent_x) / 2),
]
.as_ref(),
)
.split(popup_layout[1])[1]
}
/// makes sure Rect `r` at least stays as big as min and not bigger than max
pub fn rect_inside(min: Size, max: Size, r: Rect) -> Rect {
let new_width = r.width.max(min.width).min(max.width);
let new_height = r.height.max(min.height).min(max.height);
let diff_width = new_width.saturating_sub(r.width);
let diff_height = new_height.saturating_sub(r.height);
Rect::new(
r.x.saturating_sub(diff_width / 2),
r.y.saturating_sub(diff_height / 2),
new_width,
new_height,
)
}
pub fn centered_rect_absolute(
width: u16,
height: u16,
r: Rect,
) -> Rect {
Rect::new(
(r.width.saturating_sub(width)) / 2,
(r.height.saturating_sub(height)) / 2,
width.min(r.width),
height.min(r.height),
)
}
///
pub fn common_nav(
key: crossterm::event::KeyEvent,
key_config: &SharedKeyConfig,
) -> Option<MoveSelection> {
if key == key_config.move_down {
Some(MoveSelection::Down)
} else if key == key_config.move_up {
Some(MoveSelection::Up)
} else if key == key_config.page_up {
Some(MoveSelection::PageUp)
} else if key == key_config.page_down {
Some(MoveSelection::PageDown)
} else if key == key_config.move_right {
Some(MoveSelection::Right)
} else if key == key_config.move_left {
Some(MoveSelection::Left)
} else if key == key_config.home || key == key_config.shift_up {
Some(MoveSelection::Top)
} else if key == key_config.end || key == key_config.shift_down {
Some(MoveSelection::End)
} else {
None
}
}
|