Layout manager (#4601)

* ad plugin override_layout command

* watch available layouts and report to plugin thread

* Event::AvailableLayoutInfo

* save layout command

* refactor save_layout

* fix api and permissions

* delete_layout API command

* edit layout in place API

* edit layout response through api

* propagate layout parsing errors

* generate random name plugin api

* dump stringified layout API

* synchronicity dump_session_layout and include LayoutMetadata in sync response

* parse_layout plugin api

* fix: default to default layout dir in plugin api

* rename_layout plugin command API

* initial implementation of multi-tab override

* apply to multiple tabs

* allow applying to only the active tab

* add tab/pane names to layout parsing metadata

* indicate is_builtin_plugin in PaneMetadata

* get_layout_dir plugin API command

* consolidate (and fix) is_builtin_plugin logic

* fix bad ret

* allow dumping the layout for just a specific tab in the session

* get focused pane and tab sync api

* color last substring variants

* add plugin

* update assets

* fix tests

* add e2e tests for new plugin apis

* update ui with new shortcut

* rustfmt

* docs(changelog): add PR

1 files changed, 137 insertions, 0 deletions

diff --git a/zellij-utils/src/plugin_api/plugin_command.proto b/zellij-utils/src/plugin_api/plugin_command.proto
index fb456ccd..0a0ad2b0 100644
--- a/zellij-utils/src/plugin_api/plugin_command.proto
+++ b/zellij-utils/src/plugin_api/plugin_command.proto
@@ -166,6 +166,16 @@ enum CommandName {
   SendSigintToPaneId = 171;
   SendSigkillToPaneId = 172;
   GetPanePid = 173;
+  OverrideLayout = 174;
+  SaveLayout = 175;
+  DeleteLayout = 176;
+  EditLayout = 177;
+  GenerateRandomName = 178;
+  DumpLayout = 179;
+  ParseLayout = 180;
+  RenameLayout = 181;
+  GetLayoutDir = 182;
+  GetFocusedPaneInfo = 183;
 }
 
 message PluginCommand {
@@ -280,6 +290,17 @@ message PluginCommand {
     PaneId send_sigint_to_pane_id_payload = 121;
     PaneId send_sigkill_to_pane_id_payload = 122;
     GetPanePidPayload get_pane_pid_payload = 123;
+    OverrideLayoutPayload override_layout_payload = 124;
+    SaveLayoutPayload save_layout_payload = 125;
+    DeleteLayoutPayload delete_layout_payload = 126;
+    EditLayoutPayload edit_layout_payload = 127;
+    GenerateRandomNamePayload generate_random_name_payload = 128;
+    DumpLayoutPayload dump_layout_payload = 129;
+    ParseLayoutPayload parse_layout_payload = 130;
+    RenameLayoutPayload rename_layout_payload = 131;
+    GetLayoutDirPayload get_layout_dir_payload = 132;
+    DumpSessionLayoutPayload dump_session_layout_payload = 133;
+    GetFocusedPaneInfoPayload get_focused_pane_info_payload = 134;
   }
 }
 
@@ -288,6 +309,10 @@ message NewTabPayload {
   optional string cwd = 2;
 }
 
+message DumpSessionLayoutPayload {
+  optional uint32 tab_index = 1;
+}
+
 message RunActionPayload {
   action.Action action = 1;
   repeated ContextItem context = 2;
@@ -755,3 +780,115 @@ message GetPanePidResponse {
     string error = 2;
   }
 }
+
+message SaveLayoutResponse {
+  oneof result {
+    bool success = 1;
+    string error = 2;
+  }
+}
+
+message DeleteLayoutResponse {
+  oneof result {
+    bool success = 1;
+    string error = 2;
+  }
+}
+
+message EditLayoutResponse {
+  oneof result {
+    bool success = 1;
+    string error = 2;
+  }
+}
+
+message GenerateRandomNameResponse {
+  string name = 1;
+}
+
+message OverrideLayoutPayload {
+  event.LayoutInfo layout_info = 1;
+  repeated ContextItem context = 2;
+  bool retain_existing_terminal_panes = 3;
+  bool retain_existing_plugin_panes = 4;
+  bool apply_only_to_active_tab = 5;
+}
+
+message SaveLayoutPayload {
+  string layout_name = 1;
+  string layout_kdl = 2;
+  bool overwrite = 3;
+}
+
+message DeleteLayoutPayload {
+  string layout_name = 1;
+}
+
+message EditLayoutPayload {
+  string layout_name = 1;
+  repeated ContextItem context = 2;
+}
+
+message GenerateRandomNamePayload {}
+
+message DumpLayoutPayload {
+  string layout_name = 1;
+}
+
+message DumpLayoutResponse {
+  oneof result {
+    string layout_content = 1;
+    string error = 2;
+  }
+}
+
+message DumpSessionLayoutResponse {
+  oneof result {
+    string layout_content = 1;
+    string error = 2;
+  }
+  optional api.event.LayoutMetadata metadata = 3;
+}
+
+message ParseLayoutPayload {
+  string layout_string = 1;
+}
+
+message ParseLayoutResponse {
+  oneof result {
+    api.event.LayoutMetadata metadata = 1;
+    api.event.LayoutParsingError error = 2;
+  }
+}
+
+message RenameLayoutPayload {
+  string old_layout_name = 1;
+  string new_layout_name = 2;
+}
+
+message RenameLayoutResponse {
+  oneof result {
+    bool success = 1;
+    string error = 2;
+  }
+}
+
+message GetLayoutDirPayload {}
+
+message GetLayoutDirResponse {
+  string layout_dir = 1;
+}
+
+message GetFocusedPaneInfoPayload {}
+
+message GetFocusedPaneInfoResponse {
+  oneof result {
+    FocusedPaneInfo focused_pane_info = 1;
+    string error = 2;
+  }
+}
+
+message FocusedPaneInfo {
+  uint32 focused_tab_index = 1;
+  PaneId focused_pane_id = 2;
+}