[editor] Support space insertion instead of tabs

Elm_Code support and option in Edi to use spaces when the
Tab key is pressed - make this default too.

legacy/elm_code/src/lib/widget/elm_code_widget.c

@@ -1006,6 +1006,30 @@ _elm_code_widget_text_at_cursor_insert(Elm_Code_Widget *widget, const char *text
          eo_event_callback_call(ELM_CODE_WIDGET_EVENT_CHANGED_USER, NULL));
 }
 
+static void
+_elm_code_widget_tab_at_cursor_insert(Elm_Code_Widget *widget)
+{
+   Elm_Code_Widget_Data *pd;
+   unsigned int col, row;
+
+   pd = eo_data_scope_get(widget, ELM_CODE_WIDGET_CLASS);
+   if (!pd->tab_inserts_spaces)
+     {
+        _elm_code_widget_text_at_cursor_insert(widget, "\t", 1);
+        return;
+     }
+
+   eo_do(widget,
+         elm_obj_code_widget_cursor_position_get(&col, &row));
+   col = (col - 1) % pd->tabstop;
+
+   while (col < pd->tabstop)
+     {
+        _elm_code_widget_text_at_cursor_insert(widget, " ", 1);
+        col++;
+     }
+}
+
 static void
 _elm_code_widget_newline(Elm_Code_Widget *widget)
 {
@@ -1215,6 +1239,8 @@ _elm_code_widget_key_down_cb(void *data, Evas *evas EINA_UNUSED,
      _elm_code_widget_backspace(widget);
    else if (!strcmp(ev->key, "Delete"))
      _elm_code_widget_delete(widget);
+   else if (!strcmp(ev->key, "Tab"))
+     _elm_code_widget_tab_at_cursor_insert(widget);
 
    else if (ev->string && strlen(ev->string) == 1)
      _elm_code_widget_text_at_cursor_insert(widget, ev->string, 1);
@@ -1445,6 +1471,19 @@ _elm_code_widget_show_whitespace_get(Eo *obj EINA_UNUSED, Elm_Code_Widget_Data *
    return pd->show_whitespace;
 }
 
+EOLIAN static void
+_elm_code_widget_tab_inserts_spaces_set(Eo *obj, Elm_Code_Widget_Data *pd, Eina_Bool spaces)
+{
+   pd->tab_inserts_spaces = spaces;
+   _elm_code_widget_fill(obj);
+}
+
+EOLIAN static Eina_Bool
+_elm_code_widget_tab_inserts_spaces_get(Eo *obj EINA_UNUSED, Elm_Code_Widget_Data *pd)
+{
+   return pd->tab_inserts_spaces;
+}
+
 EOLIAN static void
 _elm_code_widget_cursor_position_set(Eo *obj, Elm_Code_Widget_Data *pd, unsigned int col, unsigned int line)
 {

legacy/elm_code/src/lib/widget/elm_code_widget.eo

@@ -130,6 +130,17 @@ class Elm.Code_Widget (Elm.Layout, Elm_Interface_Atspi_Text)
             show_whitespace: Eina_Bool; [[Whether or not we show whitespace characters]]
          }
       }
+      @property tab_inserts_spaces {
+         set {
+            [[Set whether space characters should be inserted instead of tabs.]]
+         }
+         get {
+            [[Get whether or not space characters will be inserted instead of tabs.]]
+         }
+         values {
+            tab_inserts_spaces: Eina_Bool; [[EINA_TRUE if we should insert space characters instead of a tab when the Tab key is pressed]]
+         }
+      }
       @property cursor_position {
          set {
             [[Set the current location of the text cursor.]]

legacy/elm_code/src/lib/widget/elm_code_widget_private.h

@@ -23,7 +23,7 @@ typedef struct
    Eina_Bool editable, focussed;
    Eina_Bool show_line_numbers;
    unsigned int line_width_marker, tabstop;
-   Eina_Bool show_whitespace;
+   Eina_Bool show_whitespace, tab_inserts_spaces;
 
    Elm_Code_Widget_Selection_Data *selection;
    Evas_Object *tooltip;