Refactor BufferManager

src/buffer.cc

@@ -29,7 +29,7 @@ Buffer::Buffer(String name, Type type,
       m_hook_manager(GlobalHookManager::instance()),
       m_option_manager(GlobalOptionManager::instance())
 {
-    BufferManager::instance().register_buffer(this);
+    BufferManager::instance().register_buffer(*this);
     if (not initial_content.empty())
         apply_modification(Modification::make_insert(begin(), std::move(initial_content)));
 
@@ -48,7 +48,7 @@ Buffer::~Buffer()
     m_hook_manager.run_hook("BufClose", m_name, Context(Editor(*this)));
 
     m_windows.clear();
-    BufferManager::instance().unregister_buffer(this);
+    BufferManager::instance().unregister_buffer(*this);
     assert(m_change_listeners.empty());
 }
 

src/buffer_manager.cc

@@ -13,36 +13,42 @@ BufferManager::~BufferManager()
 {
     // delete remaining buffers
     while (not m_buffers.empty())
-        delete m_buffers.begin()->second.get();
+        delete m_buffers.front().get();
 }
 
-void BufferManager::register_buffer(Buffer* buffer)
+void BufferManager::register_buffer(Buffer& buffer)
 {
-    assert(buffer);
-    const String& name = buffer->name();
-    if (m_buffers.find(name) != m_buffers.end())
-        throw name_not_unique();
-
-    m_buffers[name] = safe_ptr<Buffer>(buffer);
-}
-
-void BufferManager::unregister_buffer(Buffer* buffer)
-{
-    assert(buffer);
-    auto buffer_it = m_buffers.find(buffer->name());
-    if (buffer_it != m_buffers.end())
+    const String& name = buffer.name();
+    for (auto& buf : m_buffers)
     {
-        assert(buffer_it->second == buffer);
-        m_buffers.erase(buffer_it);
+        if (buf->name() == name)
+            throw name_not_unique();
     }
+
+    m_buffers.push_back(safe_ptr<Buffer>(&buffer));
+}
+
+void BufferManager::unregister_buffer(Buffer& buffer)
+{
+    for (auto it = m_buffers.begin(); it != m_buffers.end(); ++it)
+    {
+        if (*it == &buffer)
+        {
+            m_buffers.erase(it);
+            return;
+        }
+    }
+    assert(false);
 }
 
 Buffer* BufferManager::get_buffer(const String& name)
 {
-    if (m_buffers.find(name) == m_buffers.end())
+    for (auto& buf : m_buffers)
+    {
+        if (buf->name() == name)
+            return buf.get();
+    }
     return nullptr;
-
-    return m_buffers[name].get();
 }
 
 CandidateList BufferManager::complete_buffername(const String& prefix,
@@ -52,8 +58,9 @@ CandidateList BufferManager::complete_buffername(const String& prefix,
     CandidateList result;
     for (auto& buffer : m_buffers)
     {
-        if (buffer.first.substr(0, real_prefix.length()) == real_prefix)
-            result.push_back(buffer.first);
+        const String& name = buffer->name();
+        if (name.substr(0, real_prefix.length()) == real_prefix)
+            result.push_back(name);
     }
     return result;
 }

src/buffer_manager.hh

@@ -14,25 +14,16 @@ class Buffer;
 class BufferManager : public Singleton<BufferManager>
 {
 public:
-    typedef std::unordered_map<String, safe_ptr<Buffer>> BufferMap;
-
-    struct iterator : public BufferMap::const_iterator
-    {
-        typedef BufferMap::const_iterator parent_type;
-
-        iterator() {}
-        iterator(const parent_type& other) : parent_type(other) {}
-        Buffer& operator*()  const { return *(parent_type::operator*().second); }
-        Buffer* operator->() const { return parent_type::operator*().second.get(); }
-    };
+    using BufferList = std::vector<safe_ptr<Buffer>>;
+    using iterator = BufferList::const_iterator;
 
     ~BufferManager();
 
-    void register_buffer(Buffer* buffer);
-    void unregister_buffer(Buffer* buffer);
+    void register_buffer(Buffer& buffer);
+    void unregister_buffer(Buffer& buffer);
 
-    iterator begin() const { return iterator(m_buffers.begin()); }
-    iterator end() const { return iterator(m_buffers.end()); }
+    iterator begin() const { return m_buffers.cbegin(); }
+    iterator end() const { return m_buffers.cend(); }
     size_t   count() const { return m_buffers.size(); }
 
     Buffer* get_buffer(const String& name);
@@ -41,7 +32,7 @@ public:
                                       size_t cursor_pos = String::npos);
 
 private:
-    BufferMap m_buffers;
+    BufferList m_buffers;
 };
 
 }

src/commands.cc

@@ -293,8 +293,8 @@ void quit(const CommandParameters& params, Context& context)
         std::vector<String> names;
         for (auto& buffer : BufferManager::instance())
         {
-            if (buffer.type() != Buffer::Type::Scratch and buffer.is_modified())
-                names.push_back(buffer.name());
+            if (buffer->type() != Buffer::Type::Scratch and buffer->is_modified())
+                names.push_back(buffer->name());
         }
         if (not names.empty())
         {
@@ -355,11 +355,11 @@ void delete_buffer(const CommandParameters& params, Context& context)
     {
         if (manager.count() == 1)
             throw runtime_error("buffer " + buffer->name() + " is the last one");
-        for (Buffer& buf : manager)
+        for (auto& buf : manager)
         {
-            if (&buf != buffer)
+            if (buf != buffer)
             {
-               context = Context(*buf.get_or_create_window());
+               context = Context(*buf->get_or_create_window());
                break;
             }
         }