Draw command characters as they are input

src/gui/Window.cc

@@ -135,6 +135,7 @@ bool Window::create(std::shared_ptr<Buffer> buffer)
     m_command_buffer_pane = std::make_shared<BufferPane>(this, m_command_buffer);
     m_command_buffer_pane->set_command_mode();
     m_command_buffer_screen_rows = 1;
+    m_command_invalid = false;
 
     resize(INITIAL_WIDTH, INITIAL_HEIGHT);
 
@@ -456,11 +457,39 @@ void Window::redraw()
 
     m_buffer_pane->draw();
     m_gl->draw_rect(0, m_command_buffer_screen_rows * m_font->get_line_height(), m_width, 1, 0.5, 0.5, 0.5, 1.0);
-    m_command_buffer_pane->draw();
+    if (m_focused_buffer_pane->insert_mode())
+    {
+        m_command_buffer_pane->draw();
+    }
+    else
+    {
+        draw_command_input();
+    }
 
     Jtk_SwapBuffers(m_window);
 }
 
+void Window::draw_command_input()
+{
+    int x = 0;
+    float g, b;
+    if (m_command_invalid)
+    {
+        g = 0.0;
+        b = 0.0;
+    }
+    else
+    {
+        g = 1.0;
+        b = 1.0;
+    }
+    for (size_t i = 0u, length = m_command_input.size(); i < length; i++)
+    {
+        m_gl->draw_character(x, 0, m_command_input[i], *m_font, 1.0, g, b, 1.0);
+        x += m_font->get_advance();
+    }
+}
+
 void Window::change_focus(std::shared_ptr<BufferPane> buffer_pane)
 {
     m_focused_buffer_pane->set_focused(false);

src/gui/Window.h

@@ -51,6 +51,7 @@ protected:
     void handle_command(const EncodedString & command);
     void evaluate_command_input();
     void execute_command(const Command & command);
+    void draw_command_input();
 
     void command_write_file(const CommandParser & cp);
     void command_quit(const CommandParser & cp);