Add regex terminal hints

This adds support for hints, which allow opening parts of the visual
buffer with external programs if they match a certain regex.

This is done using a visual overlay triggered on a specified key
binding, which then instructs the user which keys they need to press to
pass the text to the application.

In the future it should be possible to supply some built-in actions for
Copy/Pasting the action and using this to launch text when clicking on
it with the mouse. But the current implementation should already be
useful as-is.

Fixes #2792.
Fixes #2536.

1 files changed, 7 insertions, 1 deletions

diff --git a/alacritty/src/config/bindings.rs b/alacritty/src/config/bindings.rs
index 4d0fcadd..732875db 100644
--- a/alacritty/src/config/bindings.rs
+++ b/alacritty/src/config/bindings.rs
@@ -16,6 +16,8 @@ use alacritty_terminal::config::Program;
 use alacritty_terminal::term::TermMode;
 use alacritty_terminal::vi_mode::ViMotion;
 
+use crate::config::ui_config::Hint;
+
 /// Describes a state and action to take in that state.
 ///
 /// This is the shared component of `MouseBinding` and `KeyBinding`.
@@ -91,6 +93,10 @@ pub enum Action {
     #[config(skip)]
     Command(Program),
 
+    /// Regex keyboard hints.
+    #[config(skip)]
+    Hint(Hint),
+
     /// Move vi mode cursor.
     #[config(skip)]
     ViMotion(ViMotion),
@@ -1132,7 +1138,7 @@ impl<'a> Deserialize<'a> for KeyBinding {
 /// Our deserialize impl wouldn't be covered by a derive(Deserialize); see the
 /// impl below.
 #[derive(Debug, Copy, Clone, Hash, Default, Eq, PartialEq)]
-pub struct ModsWrapper(ModifiersState);
+pub struct ModsWrapper(pub ModifiersState);
 
 impl ModsWrapper {
     pub fn into_inner(self) -> ModifiersState {