Use a plain SelectionList for Context, remove DynamicSelectionList

src/context.cc

@@ -21,7 +21,7 @@ Buffer& Context::buffer() const
 {
     if (not has_buffer())
         throw runtime_error("no buffer in context");
-    return (*m_selections).registry();
+    return const_cast<Buffer&>((*m_selections).buffer());
 }
 
 Window& Context::window() const
@@ -175,7 +175,7 @@ void Context::change_buffer(Buffer& buffer)
     if (has_client())
         client().change_buffer(buffer);
     else
-        m_selections = DynamicSelectionList{ { buffer, Selection{} } };
+        m_selections = SelectionList{buffer, Selection{}};
     if (has_input_handler())
         input_handler().reset_normal_mode();
 }
@@ -184,14 +184,13 @@ SelectionList& Context::selections()
 {
     if (not m_selections)
         throw runtime_error("no selections in context");
+    (*m_selections).update();
     return *m_selections;
 }
 
 const SelectionList& Context::selections() const
 {
-    if (not m_selections)
-        throw runtime_error("no selections in context");
-    return *m_selections;
+    return const_cast<Context&>(*this).selections();
 }
 
 std::vector<String> Context::selections_content() const

src/context.hh

@@ -1,7 +1,7 @@
 #ifndef context_hh_INCLUDED
 #define context_hh_INCLUDED
 
-#include "dynamic_selection_list.hh"
+#include "selection.hh"
 
 #include <boost/optional.hpp>
 
@@ -85,7 +85,7 @@ private:
     safe_ptr<Client>       m_client;
 
     friend class Client;
-    boost::optional<DynamicSelectionList> m_selections;
+    boost::optional<SelectionList> m_selections;
 
     String m_name;
 

src/dynamic_selection_list.cc

@@ -1,30 +0,0 @@
-#include "dynamic_selection_list.hh"
-
-namespace Kakoune
-{
-
-DynamicSelectionList::DynamicSelectionList(SelectionList selections)
-    : SelectionList(std::move(selections)),
-      BufferChangeListener_AutoRegister(const_cast<Buffer&>(buffer()))
-{
-    check_invariant();
-}
-
-DynamicSelectionList& DynamicSelectionList::operator=(SelectionList selections)
-{
-    SelectionList::operator=(std::move(selections));
-    check_invariant();
-    return *this;
-}
-
-void DynamicSelectionList::on_insert(const Buffer& buffer, ByteCoord begin, ByteCoord end, bool at_end)
-{
-    update();
-}
-
-void DynamicSelectionList::on_erase(const Buffer& buffer, ByteCoord begin, ByteCoord end, bool at_end)
-{
-    update();
-}
-
-}

src/dynamic_selection_list.hh

@@ -1,30 +0,0 @@
-#ifndef dynamic_selection_list_hh_INCLUDED
-#define dynamic_selection_list_hh_INCLUDED
-
-#include "selection.hh"
-
-namespace Kakoune
-{
-
-class DynamicSelectionList : public SelectionList,
-                             public BufferChangeListener_AutoRegister
-{
-public:
-    using iterator = SelectionList::iterator;
-    using const_iterator = SelectionList::const_iterator;
-
-    DynamicSelectionList(SelectionList selections);
-
-    DynamicSelectionList& operator=(SelectionList selections);
-
-    using SelectionList::buffer;
-
-private:
-    void on_insert(const Buffer& buffer, ByteCoord begin, ByteCoord end, bool at_end) override;
-    void on_erase(const Buffer& buffer, ByteCoord begin, ByteCoord end, bool at_end) override;
-};
-
-}
-
-#endif // dynamic_selection_list_hh_INCLUDED
-

src/input_handler.cc

@@ -764,6 +764,7 @@ private:
             size_t index = std::min(i, strings.size()-1);
             buffer.insert(buffer.iterator_at(selections[i].cursor()),
                           strings[index]);
+           selections.update();
         }
     }
 
@@ -771,8 +772,12 @@ private:
     {
         auto str = codepoint_to_str(key);
         auto& buffer = context().buffer();
-        for (auto& sel : context().selections())
+        auto& selections = context().selections();
+        for (auto& sel : selections)
+        {
             buffer.insert(buffer.iterator_at(sel.cursor()), str);
+            selections.update();
+        }
         context().hooks().run_hook("InsertChar", str, context());
     }
 
@@ -829,6 +834,8 @@ private:
                anchor = buffer.char_prev(anchor);
             if (buffer.is_end(cursor))
                cursor = buffer.char_prev(cursor);
+
+            selections.update();
             sel.anchor() = anchor;
             sel.cursor() = cursor;
         }

src/insert_completer.cc

@@ -185,13 +185,14 @@ void InsertCompleter::select(int offset)
     if (m_current_candidate < 0)
         m_current_candidate += m_matching_candidates.size();
     const String& candidate = m_matching_candidates[m_current_candidate];
-    const auto& cursor_pos = m_context.selections().main().cursor();
+    auto& selections = m_context.selections();
+    const auto& cursor_pos = selections.main().cursor();
     const auto prefix_len = buffer.distance(m_completions.begin, cursor_pos);
     const auto suffix_len = std::max(0_byte, buffer.distance(cursor_pos, m_completions.end));
     const auto buffer_len = buffer.byte_count();
 
     auto ref = buffer.string(m_completions.begin, m_completions.end);
-    for (auto& sel : m_context.selections())
+    for (auto& sel : selections)
     {
         auto offset = buffer.offset(sel.cursor());
         auto pos = buffer.iterator_at(sel.cursor());
@@ -200,6 +201,7 @@ void InsertCompleter::select(int offset)
         {
             pos = buffer.erase(pos - prefix_len, pos + suffix_len);
             buffer.insert(pos, candidate);
+            const_cast<SelectionList&>(selections).update();
         }
     }
     m_completions.end   = cursor_pos;

src/normal.cc

@@ -70,6 +70,7 @@ void insert(Buffer& buffer, SelectionList& selections, const String& str)
     {
         auto pos = prepare_insert<mode>(buffer, sel);
         pos = buffer.insert(pos, str);
+        selections.update();
         if (mode == InsertMode::Replace and pos != buffer.end())
         {
             sel.anchor() = pos.coord();
@@ -93,6 +94,7 @@ void insert(Buffer& buffer, SelectionList& selections, memoryview<String> string
         auto pos = prepare_insert<mode>(buffer, sel);
         const String& str = strings[std::min(i, strings.size()-1)];
         pos = buffer.insert(pos, str);
+        selections.update();
         if (mode == InsertMode::Replace and pos != buffer.end())
         {
             sel.anchor() = pos.coord();

src/selection.cc

@@ -134,6 +134,9 @@ void update_erase(std::vector<Selection>& sels, ByteCoord begin, ByteCoord end,
 
 void SelectionList::update()
 {
+    if (m_timestamp == m_buffer->timestamp())
+        return;
+
     for (auto& change : m_buffer->changes_since(m_timestamp))
     {
         if (change.type == Buffer::Change::Insert)
@@ -141,9 +144,10 @@ void SelectionList::update()
         else
             update_erase(m_selections, change.begin, change.end, change.at_end);
     }
-    m_timestamp = m_buffer->timestamp();
 
     check_invariant();
+
+    m_timestamp = m_buffer->timestamp();
 }
 
 void SelectionList::check_invariant() const
@@ -152,12 +156,11 @@ void SelectionList::check_invariant() const
     auto& buffer = this->buffer();
     kak_assert(size() > 0);
     kak_assert(m_main < size());
-    for (size_t i = 0; i+1 < size(); ++ i)
-        kak_assert((*this)[i].min() <= (*this)[i+1].min());
-
     for (size_t i = 0; i < size(); ++i)
     {
         auto& sel = (*this)[i];
+        if (i+1 < size())
+            kak_assert((*this)[i].min() <= (*this)[i+1].min());
         kak_assert(buffer.is_valid(sel.anchor()));
         kak_assert(buffer.is_valid(sel.cursor()));
         kak_assert(not buffer.is_end(sel.anchor()));