Delay window deletion until we get back to main loop

Avoid WinResize hooks while redrawing, ensure window resize only
take place while handling user input.

Fixes #672

src/buffer_manager.cc

@@ -109,6 +109,7 @@ void BufferManager::clear_buffer_trash()
         // Do that again, to be tolerant in some corner cases, where a buffer is
         // deleted during its creation
         ClientManager::instance().ensure_no_client_uses_buffer(*buffer);
+        ClientManager::instance().clear_window_trash();
 
         delete buffer;
     }

src/client.cc

@@ -85,7 +85,7 @@ void Client::handle_available_input(EventMode mode)
                 else if (*key == Key::FocusOut)
                     context().hooks().run_hook("FocusOut", context().name(), context());
                 else if (key->modifiers == Key::Modifiers::Resize)
-                    force_redraw();
+                    m_window->set_dimensions(m_ui->dimensions());
                 else
                     m_input_handler.handle_key(*key);
             }

src/client_manager.cc

@@ -143,9 +143,18 @@ void ClientManager::ensure_no_client_uses_buffer(Buffer& buffer)
     auto end = std::remove_if(m_free_windows.begin(), m_free_windows.end(),
                               [&buffer](const WindowAndSelections& ws)
                               { return &ws.window->buffer() == &buffer; });
+
+    for (auto it = end; it != m_free_windows.end(); ++it)
+        m_window_trash.push_back(std::move(it->window));
+
     m_free_windows.erase(end, m_free_windows.end());
 }
 
+void ClientManager::clear_window_trash()
+{
+    m_window_trash.clear();
+}
+
 bool ClientManager::validate_client_name(StringView name) const
 {
     return const_cast<ClientManager*>(this)->get_client_ifp(name) == nullptr;

src/client_manager.hh

@@ -35,7 +35,7 @@ public:
 
     void clear();
 
-    void   ensure_no_client_uses_buffer(Buffer& buffer);
+    void ensure_no_client_uses_buffer(Buffer& buffer);
 
     WindowAndSelections get_free_window(Buffer& buffer);
     void add_free_window(std::unique_ptr<Window>&& window, SelectionList selections);
@@ -57,11 +57,13 @@ public:
     CandidateList complete_client_name(StringView name,
                                        ByteCount cursor_pos = -1) const;
 
+    void clear_window_trash();
 private:
     String generate_name() const;
 
     ClientList m_clients;
     Vector<WindowAndSelections, MemoryDomain::Client> m_free_windows;
+    Vector<std::unique_ptr<Window>> m_window_trash;
 };
 
 }

src/main.cc

@@ -580,6 +580,7 @@ int run_server(StringView session, StringView init_command,
             client_manager.redraw_clients();
             event_manager.handle_next_events(EventMode::Normal);
             client_manager.handle_pending_inputs();
+            client_manager.clear_window_trash();
             buffer_manager.clear_buffer_trash();
             string_registry.purge_unused();
 

src/window.cc

@@ -80,8 +80,7 @@ Window::Setup Window::build_setup(const Context& context) const
     for (auto& sel : context.selections())
         selections.push_back({sel.cursor(), sel.anchor()});
 
-    return { m_position,
-             context.client().dimensions(),
+    return { m_position, m_dimensions,
              context.buffer().timestamp(),
              context.selections().main_index(),
              std::move(selections) };
@@ -92,7 +91,7 @@ bool Window::needs_redraw(const Context& context) const
     auto& selections = context.selections();
 
     if (m_position != m_last_setup.position or
-        context.client().dimensions() != m_last_setup.dimensions or
+        m_dimensions != m_last_setup.dimensions or
         context.buffer().timestamp() != m_last_setup.timestamp or
         selections.main_index() != m_last_setup.main_selection or
         selections.size() != m_last_setup.selections.size())
@@ -120,7 +119,6 @@ const DisplayBuffer& Window::update_display_buffer(const Context& context)
     DisplayBuffer::LineList& lines = m_display_buffer.lines();
     lines.clear();
 
-    set_dimensions(context.client().dimensions());
     if (m_dimensions == CharCoord{0,0})
         return m_display_buffer;
 
@@ -365,9 +363,8 @@ void Window::clear_display_buffer()
 
 void Window::on_option_changed(const Option& option)
 {
-    run_hook_in_own_context("WinSetOption",
-                            format("{}={}", option.name(), option.get_as_string()));
-
+    run_hook_in_own_context("WinSetOption", format("{}={}", option.name(),
+                                                   option.get_as_string()));
     // an highlighter might depend on the option, so we need to redraw
     force_redraw();
 }