Support CSI2031 (dark/light theme switching) + remove STDIN cache to avoid stale color queries (#5105)

* initial phase 1 implementation

* various fies

* some fixes

* fix fragmented stdin cases

* some fixes

* renaming

* guard against old clients

* implement csi 2031

* allow toggling theme with actions

* rustfmt

* fix: finalize trailing characters in ansi parser as well

* add pr

1 files changed, 18 insertions, 0 deletions

diff --git a/zellij-utils/src/input/options.rs b/zellij-utils/src/input/options.rs
index bb90b7b1..854ef271 100644
--- a/zellij-utils/src/input/options.rs
+++ b/zellij-utils/src/input/options.rs
@@ -48,6 +48,16 @@ pub struct Options {
     /// Set the default theme
     #[clap(long, value_parser)]
     pub theme: Option<String>,
+    /// Theme name to apply when the host terminal reports a dark color palette
+    /// (CSI 2031 / DSR 997). Requires `theme_light` to also be set; if either
+    /// is missing the static `theme` remains authoritative.
+    #[clap(long, value_parser)]
+    pub theme_dark: Option<String>,
+    /// Theme name to apply when the host terminal reports a light color palette
+    /// (CSI 2031 / DSR 997). Requires `theme_dark` to also be set; if either
+    /// is missing the static `theme` remains authoritative.
+    #[clap(long, value_parser)]
+    pub theme_light: Option<String>,
     /// Set the default mode
     #[clap(long, arg_enum, hide_possible_values = true, value_parser)]
     pub default_mode: Option<InputMode>,
@@ -319,6 +329,8 @@ impl Options {
         let layout_dir = other.layout_dir.or_else(|| self.layout_dir.clone());
         let theme_dir = other.theme_dir.or_else(|| self.theme_dir.clone());
         let theme = other.theme.or_else(|| self.theme.clone());
+        let theme_dark = other.theme_dark.or_else(|| self.theme_dark.clone());
+        let theme_light = other.theme_light.or_else(|| self.theme_light.clone());
         let on_force_close = other.on_force_close.or(self.on_force_close);
         let scroll_buffer_size = other.scroll_buffer_size.or(self.scroll_buffer_size);
         let copy_command = other.copy_command.or_else(|| self.copy_command.clone());
@@ -376,6 +388,8 @@ impl Options {
         Options {
             simplified_ui,
             theme,
+            theme_dark,
+            theme_light,
             default_mode,
             default_shell,
             default_cwd,
@@ -454,6 +468,8 @@ impl Options {
         let layout_dir = other.layout_dir.or_else(|| self.layout_dir.clone());
         let theme_dir = other.theme_dir.or_else(|| self.theme_dir.clone());
         let theme = other.theme.or_else(|| self.theme.clone());
+        let theme_dark = other.theme_dark.or_else(|| self.theme_dark.clone());
+        let theme_light = other.theme_light.or_else(|| self.theme_light.clone());
         let on_force_close = other.on_force_close.or(self.on_force_close);
         let scroll_buffer_size = other.scroll_buffer_size.or(self.scroll_buffer_size);
         let copy_command = other.copy_command.or_else(|| self.copy_command.clone());
@@ -507,6 +523,8 @@ impl Options {
         Options {
             simplified_ui,
             theme,
+            theme_dark,
+            theme_light,
             default_mode,
             default_shell,
             default_cwd,