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#[macro_use]
pub mod macros;
pub mod clipboard;
pub mod document;
pub mod editor;
pub mod graphics;
pub mod gutter;
pub mod handlers {
pub mod dap;
pub mod lsp;
}
pub mod info;
pub mod input;
pub mod keyboard;
pub mod theme;
pub mod tree;
pub mod view;
use std::num::NonZeroUsize;
// uses NonZeroUsize so Option<DocumentId> use a byte rather than two
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct DocumentId(NonZeroUsize);
impl Default for DocumentId {
fn default() -> DocumentId {
// Safety: 1 is non-zero
DocumentId(unsafe { NonZeroUsize::new_unchecked(1) })
}
}
impl std::fmt::Display for DocumentId {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_fmt(format_args!("{}", self.0))
}
}
slotmap::new_key_type! {
pub struct ViewId;
}
pub enum Align {
Top,
Center,
Bottom,
}
pub fn align_view(doc: &Document, view: &mut View, align: Align) {
let pos = doc
.selection(view.id)
.primary()
.cursor(doc.text().slice(..));
let line = doc.text().char_to_line(pos);
let last_line_height = view.inner_area().height.saturating_sub(1) as usize;
let relative = match align {
Align::Center => last_line_height / 2,
Align::Top => 0,
Align::Bottom => last_line_height,
};
view.offset.row = line.saturating_sub(relative);
}
/// Applies a [`helix_core::Transaction`] to the given [`Document`]
/// and [`View`].
pub fn apply_transaction(
transaction: &helix_core::Transaction,
doc: &mut Document,
view: &mut View,
) -> bool {
// This is a short function but it's easy to call `Document::apply`
// without calling `View::apply` or in the wrong order. The transaction
// must be applied to the document before the view.
doc.apply(transaction, view.id) && view.apply(transaction, doc)
}
pub use document::Document;
pub use editor::Editor;
pub use theme::Theme;
pub use view::View;
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