window, editor: take coords rather than iterators parameters

src/editor.hh

@@ -61,9 +61,8 @@ public:
     void flip_selections();
     void keep_selection(int index);
     void remove_selection(int index);
-    void select(const BufferIterator& it,
-                SelectMode mode = SelectMode::Replace)
-    { select(Selection{ it, it }, mode); }
+    void select(const BufferCoord& c, SelectMode mode = SelectMode::Replace)
+    { auto it = m_buffer->iterator_at(c); select(Selection{ it, it }, mode); }
     void select(const Selection& sel,
                 SelectMode mode = SelectMode::Replace);
     void select(const Selector& selector,

src/normal.cc

@@ -49,11 +49,8 @@ void goto_commands(Context& context)
     int count = context.numeric_param();
     if (count != 0)
     {
-        BufferIterator target =
-            context.editor().buffer().iterator_at_line_begin(count-1);
-
         context.push_jump();
-        context.editor().select(target);
+        context.editor().select(BufferCoord{count - 1, 0});
         if (context.has_window())
             context.window().center_selection();
     }

src/window.cc

@@ -176,20 +176,21 @@ void Window::scroll_to_keep_cursor_visible_ifn()
     }
 }
 
-DisplayCoord Window::display_position(const BufferIterator& iterator)
+DisplayCoord Window::display_position(const BufferCoord& coord)
 {
     DisplayCoord res{0,0};
     for (auto& line : m_display_buffer.lines())
     {
-        if (line.buffer_line() == iterator.line())
+        if (line.buffer_line() == coord.line)
         {
             for (auto& atom : line)
             {
                 auto& content = atom.content;
                 if (content.has_buffer_range() and
-                    iterator.coord() >= content.begin() and iterator.coord() < content.end())
+                    coord >= content.begin() and coord < content.end())
                 {
-                    res.column += utf8::distance(buffer().iterator_at(content.begin()), iterator);
+                    res.column += utf8::distance(buffer().iterator_at(content.begin()),
+                                                 buffer().iterator_at(coord));
                     return res;
                 }
                 res.column += content.length();

src/window.hh

@@ -37,7 +37,7 @@ public:
     void scroll(LineCount offset);
     void update_display_buffer();
 
-    DisplayCoord display_position(const BufferIterator& it);
+    DisplayCoord display_position(const BufferCoord& coord);
 
     HighlighterGroup& highlighters() { return m_highlighters; }