Command Sequences, Blocking CLI Commands, New Plugin APIs (#4546)

* fix deadlocks

* initial logging to plugin implementation

* only log actions, include keys as Action::Write

* send actions to plugins as a new Event::UserAction

* add Action::Write metadata to plugin API

* run_action plugin command and permission

* block-until-exit/success/failure in the cli

* fix tests

* add NewBlockingPane to the plugin API

* run actions in a different thread so as not to block plugin execution

* add custom context to run_action flow

* fixes for floating pane z_index sorting and unknown protobuf events not crashing plugins

* always render the frame of pinned panes

* macros module

* add macros to config

* KDL macro parsing

* thread macros to the plugin thread

* get/update/delete macros from plugins

* add macros updated event

* add ability to rename macros

* fix deadlock

* fix z_indices with pinned unselectable panes bug

* allow plugins to opt-in to show_cursor

* change show_cursor(bool) to show_cursor(Option<coordinates>)

* test

* upgrade strum to allow proper enum iteration and case insensitive fromstr implementation for Actions

* better cwd tracking for exited command panes

* add initial panes to NewTab Action (no-op for now)

* add initial panes to cli newtab action

* make initial panes work

* add close_on_exit and start_suspended to the cli

* properly convert newtab action (potentially breaking for plugins)

* allow first pane in tab to block

* make distinction between opening panes with the last active client and the current pane in the cli

* improve some apis

* fix fixed size closing pane bug

* fix plugin cursor coordinates

* fix issues with launch-or-focus-plugin having to do with in-place and suppressed panes

* fix: set affected pane in replace pane

* allow setting a pane in place when it is suppressed and being focused (tests failing)

* fix tests

* some fixes for unsuppression of panes

* some fixes for completion_tx in new tab action

* allow replace/suppressed rather than replace/close only

* fixes for inserting suppressed panes without conflicts

* pane focus history and explicit unsuppress plugin api

* fix: prefer explicitly provided pane id in placement in actions that provide it

* fix floating pane coordinate change and z_index

* fix plugin cache dir to persist between sessions

* fix some stack focusing issues when adding panes without a client id

* make sure pinned panes are always above non-pinned floating panes

* allow plugins to copy to clipboard

* initial text styling additions implementations - buggy

* fix dimming issues

* remove extras, stay with just dim and unbold

* unbold and dim as indices

* allow ui components to render success/error colors

* allow plugins to send sigint/sigkill to processes, as well as receive their pid

* ui component fixes and send originating plugin context with run_action

* originating plugin for new tab too

* make plugn show pane command also expand stacked panes

* add sequence plugin

* remove macros

* remove snapshots

* add shortcut for sequence plugin

* fix plugin tests

* plugin tests for new apis

* update snapshots for sequence shortcut

* cleanups and formatting

* Event::CwdChanged

* moar cleanups

* remove some warnings

* remove mroe warnings

* remove dead code

* remove more dead code

* fix minor bugs in sequence plugin

* update sequence help and format codebase

* fix conditional blocking cli commands

* fix initial-command new-tab cli flag

* add client_ids to CwdChanged Event

* last fixes

* add pr

1 files changed, 38 insertions, 0 deletions

diff --git a/zellij-utils/src/input/layout.rs b/zellij-utils/src/input/layout.rs
index de555a00..d925f7c5 100644
--- a/zellij-utils/src/input/layout.rs
+++ b/zellij-utils/src/input/layout.rs
@@ -995,6 +995,44 @@ impl TiledPaneLayout {
         }
         run_instructions
     }
+    pub fn replace_next_empty_slot_with_run(&mut self, run_to_insert: Run) -> bool {
+        // Replaces the first empty slot (None or Run::Cwd) with the given Run instruction.
+        // Returns true if a replacement was made, false if no empty slot was found.
+        // Traversal order matches extract_run_instructions (breadth-first).
+
+        if self.children.is_empty() {
+            // This is a leaf node - check if it's an empty slot
+            match &self.run {
+                None | Some(Run::Cwd(_)) => {
+                    self.run = Some(run_to_insert);
+                    return true;
+                },
+                _ => return false,
+            }
+        }
+
+        // Check first child of each child (breadth-first first level)
+        for child in self.children.iter_mut() {
+            if child.children.is_empty() {
+                match &child.run {
+                    None | Some(Run::Cwd(_)) => {
+                        child.run = Some(run_to_insert);
+                        return true;
+                    },
+                    _ => {},
+                }
+            }
+        }
+
+        // Recursively check deeper levels (breadth-first continuation)
+        for child in self.children.iter_mut() {
+            if child.replace_next_empty_slot_with_run(run_to_insert.clone()) {
+                return true;
+            }
+        }
+
+        false
+    }
     pub fn ignore_run_instruction(&mut self, run_instruction: Option<Run>) {
         self.run_instructions_to_ignore.push(run_instruction);
     }