bendns' repos / helix
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'helix-view/src/register.rs')
-rw-r--r--helix-view/src/register.rs51
1 files changed, 48 insertions, 3 deletions
diff --git a/helix-view/src/register.rs b/helix-view/src/register.rs
index 050a4e4c..edad8b1e 100644
--- a/helix-view/src/register.rs
+++ b/helix-view/src/register.rs
@@ -216,14 +216,59 @@ impl Registers {
}
}
- pub fn first<'a>(&'a self, name: char, editor: &'a Editor) -> Option<Cow<'a, str>> {
- self.read(name, editor).and_then(|mut values| values.next())
+ /// "Selects" the index at the given index for the given register.
+ ///
+ /// Selecting an item pulls it to the front of the register's history.
+ ///
+ /// If the register is a special register other than a clipboard register ('+' or '*')
+ /// or if the index is out of bounds for the given register, this command is a no-op.
+ pub fn select_history_entry(&mut self, name: char, index: usize) -> Result<()> {
+ match name {
+ '_' | '#' | '.' | '%' => {
+ Err(anyhow::anyhow!("Register {name} does not support writing"))
+ }
+ _ => {
+ let Some(register) = self.inner.get_mut(&name) else {
+ return Ok(());
+ };
+ register.select_history_entry(index);
+ self.sync_clipboard_register(name)
+ }
+ }
}
- pub fn last<'a>(&'a self, name: char, editor: &'a Editor) -> Option<Cow<'a, str>> {
+ fn sync_clipboard_register(&mut self, name: char) -> Result<()> {
+ let clipboard_type = match name {
+ '+' => ClipboardType::Clipboard,
+ '*' => ClipboardType::Selection,
+ _ => return Ok(()),
+ };
+
+ let mut contents = String::new();
+ for val in self.inner[&name].values() {
+ if !contents.is_empty() {
+ contents.push_str(NATIVE_LINE_ENDING.as_str());
+ }
+ contents.push_str(&val);
+ }
+ self.clipboard_provider
+ .set_contents(contents, clipboard_type)
+ }
+
+ /// Returns the latest value in the given register.
+ ///
+ /// The latest value is the value most recently pushed to the register when
+ /// using `push`, or the last value returned by the iterator passed to [write].
+ pub fn latest<'a>(&'a self, name: char, editor: &'a Editor) -> Option<Cow<'a, str>> {
self.read(name, editor).and_then(|values| values.last())
}
+ /// Returns the oldest value in the given register.
+ /// This is the opposite of `latest`.
+ pub fn oldest<'a>(&'a self, name: char, editor: &'a Editor) -> Option<Cow<'a, str>> {
+ self.read(name, editor).and_then(|mut values| values.next())
+ }
+
pub fn iter_preview(&self) -> impl Iterator<Item = (char, &str)> {
self.inner
.iter()