Window: add a basic status line

src/main.cc

@@ -123,6 +123,16 @@ void draw_window(Window& window)
         clrtoeol();
         addch('~');
     }
+    move(max_y, 0);
+
+    set_attribute(A_UNDERLINE, 0);
+    set_attribute(A_REVERSE, 0);
+    set_attribute(A_BLINK, 0);
+    set_attribute(A_BOLD, 0);
+    set_color(Color::Cyan, Color::Black);
+
+    clrtoeol();
+    addstr(window.status_line().c_str());
 
     const WindowCoord& cursor_position = window.cursor_position();
     move(cursor_position.line, cursor_position.column);

src/window.cc

@@ -4,6 +4,7 @@
 #include "filters.hh"
 
 #include <algorithm>
+#include <sstream>
 
 namespace Kakoune
 {
@@ -327,6 +328,26 @@ void Window::scroll_to_keep_cursor_visible_ifn()
     }
 }
 
+std::string Window::status_line() const
+{
+    BufferCoord cursor = window_to_buffer(cursor_position());
+    std::ostringstream oss;
+    oss << m_buffer.name() << " -- " << cursor.line << "," << cursor.column
+        << " -- " << m_selections.size() << " sel -- ";
+    switch (m_select_mode)
+    {
+    case SelectMode::Normal:
+        oss << "[Normal]";
+        break;
+    case SelectMode::Append:
+        oss << "[Append]";
+        break;
+    default:
+        assert(false);
+    }
+    return oss.str();
+}
+
 IncrementalInserter::IncrementalInserter(Window& window, Mode mode)
     : m_window(window)
 {

src/window.hh

@@ -86,6 +86,8 @@ public:
     SelectMode select_mode() const { return m_select_mode; }
     void set_select_mode(SelectMode select_mode) { m_select_mode = select_mode; }
 
+    std::string status_line() const;
+
 private:
     friend class Buffer;