InputHandler: handle of last insert keys happening in nested modes

Move recording of keys to the input handler itself instead of the
Insert mode so that eventual nested modes (potentially introduced
by <a-;> will get their keys recorded as well).

Fixes #1680

src/input_handler.cc

@@ -1059,6 +1059,7 @@ public:
                            context().hooks().run_hook("InsertIdle", "", context());
                        }}
     {
+        last_insert().recording.set();
         last_insert().mode = mode;
         last_insert().keys.clear();
         last_insert().disable_hooks = context().hooks_disabled();
@@ -1084,6 +1085,8 @@ public:
 
         if (not temporary)
         {
+            last_insert().recording.unset();
+
             auto& selections = context().selections();
             if (m_restore_cursor)
             {
@@ -1100,7 +1103,6 @@ public:
     void on_key(Key key) override
     {
         auto& buffer = context().buffer();
-        last_insert().keys.push_back(key);
 
         const bool transient = context().flags() & Context::Flags::Transient;
         bool update_completions = true;
@@ -1441,18 +1443,23 @@ void InputHandler::repeat_last_insert()
     if (m_last_insert.keys.empty())
         return;
 
-    if (dynamic_cast<InputModes::Normal*>(&current_mode()) == nullptr)
+    if (dynamic_cast<InputModes::Normal*>(&current_mode()) == nullptr or
+        m_last_insert.recording)
         throw runtime_error{"repeating last insert not available in this context"};
 
     Vector<Key> keys;
     swap(keys, m_last_insert.keys);
     ScopedSetBool disable_hooks(context().hooks_disabled(),
                                 m_last_insert.disable_hooks);
-    // context.last_insert will be refilled by the new Insert
-    // this is very inefficient.
+
     push_mode(new InputModes::Insert(*this, m_last_insert.mode, m_last_insert.count));
     for (auto& key : keys)
+    {
+        // refill last_insert,  this is very inefficient, but necesary at the moment
+        // to properly handle insert completion
+        m_last_insert.keys.push_back(key);
         current_mode().handle_key(key);
+    }
     kak_assert(dynamic_cast<InputModes::Normal*>(&current_mode()) != nullptr);
 }
 
@@ -1526,6 +1533,12 @@ void InputHandler::handle_key(Key key)
         ++m_handle_key_level;
         auto dec = on_scope_end([this]{ --m_handle_key_level; });
 
+        auto process_key = [&](Key key) {
+            if (m_last_insert.recording)
+                m_last_insert.keys.push_back(key);
+            current_mode().handle_key(key);
+        };
+
         auto keymap_mode = current_mode().keymap_mode();
         KeymapManager& keymaps = m_context.keymaps();
         if (keymaps.is_mapped(key, keymap_mode) and
@@ -1533,10 +1546,10 @@ void InputHandler::handle_key(Key key)
         {
             ScopedSetBool disable_history{context().history_disabled()};
             for (auto& k : keymaps.get_mapping(key, keymap_mode).keys)
-                current_mode().handle_key(k);
+                process_key(k);
         }
         else
-            current_mode().handle_key(key);
+            process_key(key);
 
         // do not record the key that made us enter or leave recording mode,
         // and the ones that are triggered recursively by previous keys.

src/input_handler.hh

@@ -116,8 +116,13 @@ private:
     void push_mode(InputMode* new_mode);
     void pop_mode(InputMode* current_mode);
 
-    struct Insertion{ InsertMode mode; Vector<Key> keys; bool disable_hooks; int count; };
-    Insertion m_last_insert = { InsertMode::Insert, {}, false, 1 };
+    struct Insertion{
+        NestedBool recording;
+        InsertMode mode;
+        Vector<Key> keys;
+        bool disable_hooks;
+        int count;
+    } m_last_insert = { {}, InsertMode::Insert, {}, false, 1 };
 
     char   m_recording_reg = 0;
     String m_recorded_keys;

test/regression/1680-crash-with-dot-and-alt-semicolon/cmd

@@ -0,0 +1 @@
+afoo<a-;>:w<ret><esc>.

test/regression/1680-crash-with-dot-and-alt-semicolon/in

@@ -0,0 +1 @@
+

test/regression/1680-crash-with-dot-and-alt-semicolon/out

@@ -0,0 +1 @@
+foofoo