[evolution/webkit-composer] Fix caret handling after hitting the BackSpace key.

[Tomas Popela <tpopela src gnome org>]

commit a954eb901a3f37a295a1b2377003ec2645042dcc
Author: Tomas Popela <tpopela redhat com>
Date:   Tue Jul 2 11:48:34 2013 +0200

    Fix caret handling after hitting the BackSpace key.

 e-util/e-editor-selection.c |   31 ++++++++++++++++++++++++++-----
 1 files changed, 26 insertions(+), 5 deletions(-)
---
diff --git a/e-util/e-editor-selection.c b/e-util/e-editor-selection.c
index 56f070b..2223156 100644
--- a/e-util/e-editor-selection.c
+++ b/e-util/e-editor-selection.c
@@ -3026,6 +3026,7 @@ e_editor_selection_wrap_lines (EEditorSelection *selection,
        WebKitDOMDOMSelection *window_selection;
        WebKitDOMElement *active_paragraph;
        gboolean adding = FALSE;
+       gboolean backspace_pressed = FALSE;
        gboolean return_pressed = FALSE;
        gboolean delete_pressed = FALSE;
        gboolean jump_to_previous_line = FALSE;
@@ -3049,6 +3050,9 @@ e_editor_selection_wrap_lines (EEditorSelection *selection,
 
                if (return_pressed || (event->keyval == GDK_KEY_space))
                        adding = TRUE;
+
+               if (event->keyval == GDK_KEY_BackSpace)
+                       backspace_pressed = TRUE;
        }
 
        web_view = WEBKIT_WEB_VIEW (editor_widget);
@@ -3130,24 +3134,41 @@ e_editor_selection_wrap_lines (EEditorSelection *selection,
                        if (!adding && start_offset > selection->priv->word_wrap_length)
                                jump_to_previous_line = TRUE;
                } else {
+                       WebKitDOMElement *caret_position;
+                       gboolean parent_is_body = FALSE;
+
+                       caret_position = webkit_dom_document_get_element_by_id (document, 
"-x-evo-caret-position");
+
                        webkit_dom_dom_selection_select_all_children (
                                window_selection,
                                paragraph,
                                NULL);
 
+                       if (WEBKIT_DOM_IS_HTML_BODY_ELEMENT (webkit_dom_node_get_parent_node (WEBKIT_DOM_NODE 
(caret_position))))
+                               parent_is_body = TRUE;
+
+                       if (backspace_pressed && parent_is_body) {
+                               WebKitDOMElement *prev_sibling = 
webkit_dom_element_get_previous_element_sibling (caret_position);
+                               move_caret_into_element (document, prev_sibling);
+                               e_editor_selection_clear_caret_position_marker (selection);
+                               webkit_dom_dom_selection_modify (window_selection, "move", "forward", 
"character");
+                               webkit_dom_element_remove_attribute (WEBKIT_DOM_ELEMENT (paragraph), "id");
+
+                               return;
+                       }
+
                        /* If there is less than word_wrap_length characters do nothing */
                        if (g_utf8_strlen (e_editor_selection_get_string (selection), -1) < 
selection->priv->word_wrap_length) {
                                if (return_pressed) {
-                                       active_paragraph = webkit_dom_document_get_element_by_id (document, 
"-x-evo-active-paragraph");
                                        e_editor_selection_clear_caret_position_marker (selection);
-                                       move_caret_into_element (document, active_paragraph);
+                                       move_caret_into_element (document, WEBKIT_DOM_ELEMENT (paragraph));
                                        webkit_dom_dom_selection_modify (window_selection, "move", "forward", 
"character");
-                                       webkit_dom_element_remove_attribute (WEBKIT_DOM_ELEMENT 
(active_paragraph), "id");
                                } else {
-                                       active_paragraph = webkit_dom_document_get_element_by_id (document, 
"-x-evo-active-paragraph");
-                                       webkit_dom_element_remove_attribute (WEBKIT_DOM_ELEMENT 
(active_paragraph), "id");
                                        e_editor_selection_restore_caret_position (selection);
                                }
+
+                               webkit_dom_element_remove_attribute (WEBKIT_DOM_ELEMENT (paragraph), "id");
+
                                return;
                        }