49 lines
1.2 KiB
Rust
49 lines
1.2 KiB
Rust
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use anyhow::Error;
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use std::path::PathBuf;
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use crate::theme::Theme;
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use helix_core::State;
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pub struct View {
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pub state: State,
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pub first_line: u16,
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pub size: (u16, u16),
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pub theme: Theme, // TODO: share one instance
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}
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impl View {
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pub fn open(path: PathBuf, size: (u16, u16)) -> Result<View, Error> {
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let mut state = State::load(path)?;
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let theme = Theme::default();
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state.syntax.as_mut().unwrap().configure(theme.scopes());
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let view = View {
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state,
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first_line: 0,
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size, // TODO: pass in from term
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theme,
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};
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Ok(view)
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}
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pub fn ensure_cursor_in_view(&mut self) {
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let cursor = self.state.selection().cursor();
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let line = self.state.doc().char_to_line(cursor) as u16;
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let document_end = self.first_line + self.size.1.saturating_sub(1) - 1;
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let padding = 5u16;
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// TODO: side scroll
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if line > document_end.saturating_sub(padding) {
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// scroll down
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self.first_line += line - (document_end.saturating_sub(padding));
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} else if line < self.first_line + padding {
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// scroll up
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self.first_line = line.saturating_sub(padding);
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}
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}
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}
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