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authorBlaž Hrastnik2020-09-21 09:24:16 +0000
committerBlaž Hrastnik2020-09-21 09:24:16 +0000
commit935cfeae576f734e6cbd455bfa39df014700ae86 (patch)
treea4abe959b718f265ade4a66a844bfefadc546f90 /helix-view/src/view.rs
parent48330ddb5f36a1c5f44a636525089a019ce4439d (diff)
Split parts of helix-term into helix-view.
It still largely depends on term for some types but I plan to change that later.
Diffstat (limited to 'helix-view/src/view.rs')
-rw-r--r--helix-view/src/view.rs48
1 files changed, 48 insertions, 0 deletions
diff --git a/helix-view/src/view.rs b/helix-view/src/view.rs
new file mode 100644
index 00000000..3f7a9974
--- /dev/null
+++ b/helix-view/src/view.rs
@@ -0,0 +1,48 @@
+use anyhow::Error;
+
+use std::path::PathBuf;
+
+use crate::theme::Theme;
+use helix_core::State;
+
+pub struct View {
+ pub state: State,
+ pub first_line: u16,
+ pub size: (u16, u16),
+ pub theme: Theme, // TODO: share one instance
+}
+
+impl View {
+ pub fn open(path: PathBuf, size: (u16, u16)) -> Result<View, Error> {
+ let mut state = State::load(path)?;
+ let theme = Theme::default();
+ state.syntax.as_mut().unwrap().configure(theme.scopes());
+
+ let view = View {
+ state,
+ first_line: 0,
+ size, // TODO: pass in from term
+ theme,
+ };
+
+ Ok(view)
+ }
+
+ pub fn ensure_cursor_in_view(&mut self) {
+ let cursor = self.state.selection().cursor();
+ let line = self.state.doc().char_to_line(cursor) as u16;
+ let document_end = self.first_line + self.size.1.saturating_sub(1) - 1;
+
+ let padding = 5u16;
+
+ // TODO: side scroll
+
+ if line > document_end.saturating_sub(padding) {
+ // scroll down
+ self.first_line += line - (document_end.saturating_sub(padding));
+ } else if line < self.first_line + padding {
+ // scroll up
+ self.first_line = line.saturating_sub(padding);
+ }
+ }
+}