[evolution] Don't try to insert selection marks if they are already presented

[Tomas Popela <tpopela src gnome org>]

commit 25b02b3700b78322a622bcb7bdb0ddfc2ddf69f7
Author: Tomas Popela <tpopela redhat com>
Date:   Fri Aug 19 14:59:41 2016 +0200

    Don't try to insert selection marks if they are already presented

 .../web-extension/e-editor-dom-functions.c         |   27 +++++++++++---------
 1 files changed, 15 insertions(+), 12 deletions(-)
---
diff --git a/modules/webkit-editor/web-extension/e-editor-dom-functions.c 
b/modules/webkit-editor/web-extension/e-editor-dom-functions.c
index fe55796..4d8b75f 100644
--- a/modules/webkit-editor/web-extension/e-editor-dom-functions.c
+++ b/modules/webkit-editor/web-extension/e-editor-dom-functions.c
@@ -4156,18 +4156,21 @@ e_editor_dom_move_quoted_block_level_up (EEditorPage *editor_page)
                g_free (inner_html);
 
                if (paragraph) {
-                       webkit_dom_node_insert_before (
-                               WEBKIT_DOM_NODE (paragraph),
-                               WEBKIT_DOM_NODE (selection_start_marker),
-                               webkit_dom_node_get_first_child (
-                                       WEBKIT_DOM_NODE (paragraph)),
-                               NULL);
-                       webkit_dom_node_insert_before (
-                               WEBKIT_DOM_NODE (paragraph),
-                               WEBKIT_DOM_NODE (selection_end_marker),
-                               webkit_dom_node_get_first_child (
-                                       WEBKIT_DOM_NODE (paragraph)),
-                               NULL);
+                       if (!(webkit_dom_element_query_selector (paragraph, "#-x-evo-selection-start-marker", 
NULL)))
+                               webkit_dom_node_insert_before (
+                                       WEBKIT_DOM_NODE (paragraph),
+                                       WEBKIT_DOM_NODE (selection_start_marker),
+                                       webkit_dom_node_get_first_child (
+                                               WEBKIT_DOM_NODE (paragraph)),
+                                       NULL);
+
+                       if (!(webkit_dom_element_query_selector (paragraph, "#-x-evo-selection-end-marker", 
NULL)))
+                               webkit_dom_node_insert_before (
+                                       WEBKIT_DOM_NODE (paragraph),
+                                       WEBKIT_DOM_NODE (selection_end_marker),
+                                       webkit_dom_node_get_first_child (
+                                               WEBKIT_DOM_NODE (paragraph)),
+                                       NULL);
 
                        e_editor_dom_remove_quoting_from_element (paragraph);
                        e_editor_dom_remove_wrapping_from_element (paragraph);