Add `terminal` config section to control OSCs

Some environments demand certain OSC sequences to be disabled or
some escape sequence could require handling which is out of scope
of alacritty, but could be done by external script (OSC 777).

Added section for now just handles the `OSC 52` sequence and changes
its default to be `OnlyCopy`, which is handy for remote copy, but
`Paste` is redundant because normal `Paste` hotkey could be used as
well.

Fixes #3386.

Co-authored-by: Christian Duerr <contact@christianduerr.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/alacritty_terminal/src/term/mod.rs b/alacritty_terminal/src/term/mod.rs
index 7c4abb57..2e66b402 100644
--- a/alacritty_terminal/src/term/mod.rs
+++ b/alacritty_terminal/src/term/mod.rs
@@ -12,7 +12,7 @@ use vte::ansi::{Hyperlink as VteHyperlink, Rgb as VteRgb};
 use crate::ansi::{
     self, Attr, CharsetIndex, Color, CursorShape, CursorStyle, Handler, NamedColor, StandardCharset,
 };
-use crate::config::Config;
+use crate::config::{Config, Osc52, Terminal};
 use crate::event::{Event, EventListener};
 use crate::grid::{Dimensions, Grid, GridIterator, Scroll};
 use crate::index::{self, Boundary, Column, Direction, Line, Point, Side};
@@ -304,6 +304,9 @@ pub struct Term<T> {
 
     /// Information about damaged cells.
     damage: TermDamageState,
+
+    /// Config directly for the terminal.
+    config: Terminal,
 }
 
 impl<T> Term<T> {
@@ -363,6 +366,7 @@ impl<T> Term<T> {
             title_stack: Vec::new(),
             selection: None,
             damage,
+            config: config.terminal.clone(),
         }
     }
 
@@ -461,6 +465,8 @@ impl<T> Term<T> {
             self.grid.update_history(config.scrolling.history() as usize);
         }
 
+        self.config = config.terminal.clone();
+
         // Damage everything on config updates.
         self.mark_fully_damaged();
     }
@@ -1539,6 +1545,11 @@ impl<T: EventListener> Handler for Term<T> {
     /// Store data into clipboard.
     #[inline]
     fn clipboard_store(&mut self, clipboard: u8, base64: &[u8]) {
+        if !matches!(self.config.osc52, Osc52::OnlyCopy | Osc52::CopyPaste) {
+            debug!("Denied osc52 store");
+            return;
+        }
+
         let clipboard_type = match clipboard {
             b'c' => ClipboardType::Clipboard,
             b'p' | b's' => ClipboardType::Selection,
@@ -1555,6 +1566,11 @@ impl<T: EventListener> Handler for Term<T> {
     /// Load data from clipboard.
     #[inline]
     fn clipboard_load(&mut self, clipboard: u8, terminator: &str) {
+        if !matches!(self.config.osc52, Osc52::OnlyPaste | Osc52::CopyPaste) {
+            debug!("Denied osc52 load");
+            return;
+        }
+
         let clipboard_type = match clipboard {
             b'c' => ClipboardType::Clipboard,
             b'p' | b's' => ClipboardType::Selection,