Add ClientRenamed hook

doc/pages/hooks.asciidoc

@@ -140,6 +140,9 @@ name. Hooks with no description will always use an empty string.
 *ClientClose* `client name`::
     executed when a client is closed, after it was removed from the client
     list.
+    
+*ClientRenamed* `<old name>:<new name>`::
+    executed when a client is renamed using the `rename-client` command
 
 *RuntimeError* `error message`::
     an error was encountered while executing a user command

src/context.cc

@@ -4,6 +4,7 @@
 #include "client.hh"
 #include "face_registry.hh"
 #include "buffer_manager.hh"
+#include "hook_manager.hh"
 #include "register_manager.hh"
 #include "window.hh"
 
@@ -417,4 +418,8 @@ StringView Context::main_sel_register_value(StringView reg) const
     return RegisterManager::instance()[reg].get_main(*this, index);
 }
 
+void Context::set_name(String name) { 
+    String old_name = std::exchange(m_name, std::move(name));
+    hooks().run_hook(Hook::ClientRenamed, format("{}:{}", old_name, m_name), *this);
+}
 }

src/context.hh

@@ -110,7 +110,7 @@ public:
     StringView main_sel_register_value(StringView reg) const;
 
     const String& name() const { return m_name; }
-    void set_name(String name) { m_name = std::move(name); }
+    void set_name(String name);
 
     bool is_editing() const { return m_edition_level!= 0; }
     void disable_undo_handling() { m_edition_level = -1; }

src/hook_manager.hh

@@ -30,6 +30,7 @@ enum class Hook
     BufSetOption,
     ClientCreate,
     ClientClose,
+    ClientRenamed,
     InsertChar,
     InsertDelete,
     InsertIdle,
@@ -75,6 +76,7 @@ constexpr auto enum_desc(Meta::Type<Hook>)
         {Hook::BufSetOption, "BufSetOption"},
         {Hook::ClientCreate, "ClientCreate"},
         {Hook::ClientClose, "ClientClose"},
+        {Hook::ClientRenamed, "ClientRenamed"},
         {Hook::InsertChar, "InsertChar"},
         {Hook::InsertDelete, "InsertDelete"},
         {Hook::InsertIdle, "InsertIdle"},