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86 lines
2.0 KiB
Rust
86 lines
2.0 KiB
Rust
#[macro_use]
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pub mod macros;
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pub mod clipboard;
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pub mod document;
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pub mod editor;
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pub mod env;
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pub mod graphics;
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pub mod gutter;
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pub mod handlers {
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pub mod dap;
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pub mod lsp;
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}
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pub mod base64;
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pub mod info;
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pub mod input;
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pub mod keyboard;
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pub mod theme;
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pub mod tree;
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pub mod view;
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use std::num::NonZeroUsize;
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// uses NonZeroUsize so Option<DocumentId> use a byte rather than two
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#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
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pub struct DocumentId(NonZeroUsize);
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impl Default for DocumentId {
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fn default() -> DocumentId {
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// Safety: 1 is non-zero
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DocumentId(unsafe { NonZeroUsize::new_unchecked(1) })
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}
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}
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impl std::fmt::Display for DocumentId {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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f.write_fmt(format_args!("{}", self.0))
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}
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}
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slotmap::new_key_type! {
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pub struct ViewId;
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}
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pub enum Align {
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Top,
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Center,
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Bottom,
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}
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pub fn align_view(doc: &Document, view: &mut View, align: Align) {
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let pos = doc
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.selection(view.id)
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.primary()
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.cursor(doc.text().slice(..));
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let line = doc.text().char_to_line(pos);
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let last_line_height = view.inner_area().height.saturating_sub(1) as usize;
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let relative = match align {
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Align::Center => last_line_height / 2,
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Align::Top => 0,
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Align::Bottom => last_line_height,
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};
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view.offset.row = line.saturating_sub(relative);
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}
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/// Applies a [`helix_core::Transaction`] to the given [`Document`]
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/// and [`View`].
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pub fn apply_transaction(
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transaction: &helix_core::Transaction,
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doc: &mut Document,
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view: &mut View,
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) -> bool {
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// This is a short function but it's easy to call `Document::apply`
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// without calling `View::apply` or in the wrong order. The transaction
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// must be applied to the document before the view.
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doc.apply(transaction, view.id) && view.apply(transaction, doc)
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}
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pub use document::Document;
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pub use editor::Editor;
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pub use theme::Theme;
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pub use view::View;
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