Fix #107009: Setting Text Object Styles

This allows toggling of text styles of selected text and at the current
mouse cursor position if nothing is selected.

@@ -368,3 +366,1 @@
-            row.prop(char, "use_italic", toggle=True)
-            row.prop(char, "use_underline", toggle=True)
-            row.prop(char, "use_small_caps", toggle=True)
+            if text.is_selected == False :

@@ -44,1 +44,4 @@
 
+  /* Combined styles (#CharInfo.flag) for selected string. A flag will be
+   * set only if ALL characters in the selected string have it. */
+  int selected_flag;

@@ -1144,0 +1145,4 @@
+     * remove one if ANY characters do not have it. Break out if we've removed them all. */
+    ef->selected_flag = CU_CHINFO_BOLD | CU_CHINFO_ITALIC | CU_CHINFO_UNDERLINE |
+                        CU_CHINFO_SMALLCAPS;
+    for (int k = selstart; k <= selend && ef->selected_flag; k++) {

@@ -838,6 +838,15 @@ static bool rna_Curve_is_editmode_get(PointerRNA *ptr)
   }
 }
 
+static bool rna_Curve_is_selected(PointerRNA *ptr)

@@ -1275,0 +1302,4 @@
+  RNA_def_property_ui_text(prop, "Selected Smallcaps", "Whether the selected text is small caps");
+  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+
+  prop = RNA_def_property(srna, "is_selected", PROP_BOOLEAN, PROP_NONE);

@@ -1273,2 +1282,4 @@
   RNA_def_property_ui_text(prop, "Fast Editing", "Don't fill polygons while editing");
   RNA_def_property_update(prop, 0, "rna_Curve_update_data");
+
+  prop = RNA_def_property(srna, "select_is_underline", PROP_BOOLEAN, PROP_NONE);