code cleanups in buffer

3 files changed, 13 insertions, 8 deletions

diff --git a/src/buffer.cc b/src/buffer.cc
index eab38d92..30cf6d38 100644
--- a/src/buffer.cc
+++ b/src/buffer.cc
@@ -69,7 +69,7 @@ BufferSize Buffer::line_length(BufferPos line) const
 {
     assert(line < line_count());
     BufferPos end = (line < m_lines.size() - 1) ?
-                    m_lines[line + 1].start : length();
+                    m_lines[line + 1].start : character_count();
     return end - m_lines[line].start;
 }
 
@@ -108,7 +108,7 @@ BufferIterator Buffer::end() const
     return BufferIterator(*this, { (int)line_count()-1, (int)m_lines.back().length() });
 }
 
-BufferSize Buffer::length() const
+BufferSize Buffer::character_count() const
 {
     if (m_lines.empty())
         return 0;
diff --git a/src/buffer.hh b/src/buffer.hh
index cd86737f..30cc2af9 100644
--- a/src/buffer.hh
+++ b/src/buffer.hh
@@ -123,11 +123,13 @@ public:
     Buffer& operator= (const Buffer&) = delete;
     ~Buffer();
 
-    void           begin_undo_group();
-    void           end_undo_group();
+    Type type() const { return m_type; }
 
+    // apply given modification to buffer.
     void           modify(Modification&& modification);
 
+    void           begin_undo_group();
+    void           end_undo_group();
     bool           undo();
     bool           redo();
 
@@ -136,7 +138,7 @@ public:
 
     BufferIterator begin() const;
     BufferIterator end() const;
-    BufferSize     length() const;
+    BufferSize     character_count() const;
     BufferSize     line_count() const;
 
     BufferIterator iterator_at(const BufferCoord& line_and_column) const;
@@ -150,8 +152,11 @@ public:
     Window* get_or_create_window();
     void delete_window(Window* window);
 
+    // returns true if the buffer is in a different state than
+    // the last time it was saved
     bool is_modified() const;
-    Type type() const { return m_type; }
+
+    // notify the buffer that it was saved in the current state
     void notify_saved();
 
     void add_iterator_to_update(BufferIterator& iterator);
diff --git a/src/buffer_iterator.inl.hh b/src/buffer_iterator.inl.hh
index 65ed3c04..bcb83ab0 100644
--- a/src/buffer_iterator.inl.hh
+++ b/src/buffer_iterator.inl.hh
@@ -133,7 +133,7 @@ inline BufferIterator BufferIterator::operator+(BufferSize size) const
     assert(m_buffer);
     if (size >= 0)
     {
-        BufferSize o = std::min(m_buffer->length(), offset() + size);
+        BufferSize o = std::min(m_buffer->character_count(), offset() + size);
         for (int i = line() + 1; i < m_buffer->line_count(); ++i)
         {
             if (m_buffer->m_lines[i].start > o)
@@ -209,7 +209,7 @@ inline bool BufferIterator::is_begin() const
 inline bool BufferIterator::is_end() const
 {
     assert(m_buffer);
-    return offset() == m_buffer->length();
+    return offset() == m_buffer->character_count();
 }
 
 }