[evolution] EHTMLEditorSelection - When restoring selection correctly restore the anchor point

[Tomas Popela <tpopela src gnome org>]

commit de0e227e353a102297b96c50d79e7de8c6c861ce
Author: Tomas Popela <tpopela redhat com>
Date:   Fri Mar 20 10:32:08 2015 +0100

    EHTMLEditorSelection - When restoring selection correctly restore the anchor point
    
    Anchor point is the point where the selection started. Previously we
    didn't restore this point and it caused that the selection was reversed
    when it was saved and restored (i.e. during spell check).

 e-util/e-html-editor-selection.c |   41 ++++++++++++++++++++++++++++++++++---
 1 files changed, 37 insertions(+), 4 deletions(-)
---
diff --git a/e-util/e-html-editor-selection.c b/e-util/e-html-editor-selection.c
index ee5047e..47fe6fd 100644
--- a/e-util/e-html-editor-selection.c
+++ b/e-util/e-html-editor-selection.c
@@ -6430,13 +6430,15 @@ void
 e_html_editor_selection_save (EHTMLEditorSelection *selection)
 {
        gboolean collapsed = FALSE;
-       glong offset;
+       glong offset, anchor_offset;
        EHTMLEditorView *view;
        WebKitWebView *web_view;
        WebKitDOMDocument *document;
+       WebKitDOMDOMWindow *dom_window;
+       WebKitDOMDOMSelection *dom_selection;
        WebKitDOMRange *range;
        WebKitDOMNode *container, *next_sibling, *marker_node;
-       WebKitDOMNode *split_node, *parent_node;
+       WebKitDOMNode *split_node, *parent_node, *anchor;
        WebKitDOMElement *start_marker, *end_marker;
 
        g_return_if_fail (E_IS_HTML_EDITOR_SELECTION (selection));
@@ -6447,15 +6449,24 @@ e_html_editor_selection_save (EHTMLEditorSelection *selection)
        web_view = WEBKIT_WEB_VIEW (view);
 
        document = webkit_web_view_get_dom_document (web_view);
+       dom_window = webkit_dom_document_get_default_view (document);
+       dom_selection = webkit_dom_dom_window_get_selection (dom_window);
+
        g_object_unref (view);
 
        /* First remove all markers (if present) */
        remove_selection_markers (document);
 
-       range = html_editor_selection_get_current_range (selection);
+       if (webkit_dom_dom_selection_get_range_count (dom_selection) < 1)
+               return;
+
+       range = webkit_dom_dom_selection_get_range_at (dom_selection, 0, NULL);
        if (!range)
                return;
 
+       anchor = webkit_dom_dom_selection_get_anchor_node (dom_selection);
+       anchor_offset = webkit_dom_dom_selection_get_anchor_offset (dom_selection);
+
        collapsed = webkit_dom_range_get_collapsed (range, NULL);
        start_marker = create_selection_marker (document, TRUE);
 
@@ -6463,6 +6474,9 @@ e_html_editor_selection_save (EHTMLEditorSelection *selection)
        offset = webkit_dom_range_get_start_offset (range, NULL);
        parent_node = webkit_dom_node_get_parent_node (container);
 
+       if (webkit_dom_node_is_same_node (anchor, container) && offset == anchor_offset)
+               webkit_dom_element_set_attribute (start_marker, "data-anchor", "", NULL);
+
        if (element_has_class (WEBKIT_DOM_ELEMENT (parent_node), "-x-evo-quote-character")) {
                WebKitDOMNode *node;
 
@@ -6611,6 +6625,9 @@ e_html_editor_selection_save (EHTMLEditorSelection *selection)
        offset = webkit_dom_range_get_end_offset (range, NULL);
        parent_node = webkit_dom_node_get_parent_node (container);
 
+       if (webkit_dom_node_is_same_node (anchor, container) && offset == anchor_offset)
+               webkit_dom_element_set_attribute (end_marker, "data-anchor", "", NULL);
+
        if (element_has_class (WEBKIT_DOM_ELEMENT (parent_node), "-x-evo-quote-character")) {
                WebKitDOMNode *node;
 
@@ -6755,11 +6772,13 @@ void
 e_html_editor_selection_restore (EHTMLEditorSelection *selection)
 {
        EHTMLEditorView *view;
+       gboolean start_is_anchor = FALSE;
+       glong offset;
        WebKitWebView *web_view;
        WebKitDOMDocument *document;
        WebKitDOMElement *marker;
        WebKitDOMNode *selection_start_marker, *selection_end_marker;
-       WebKitDOMNode *parent_start, *parent_end;
+       WebKitDOMNode *parent_start, *parent_end, *anchor;
        WebKitDOMRange *range;
        WebKitDOMDOMSelection *dom_selection;
        WebKitDOMDOMWindow *window;
@@ -6823,6 +6842,7 @@ e_html_editor_selection_restore (EHTMLEditorSelection *selection)
                return;
        }
 
+       start_is_anchor = webkit_dom_element_has_attribute (marker, "data-anchor");
        parent_start = webkit_dom_node_get_parent_node (WEBKIT_DOM_NODE (marker));
 
        webkit_dom_range_set_start_after (range, WEBKIT_DOM_NODE (marker), NULL);
@@ -6849,7 +6869,20 @@ e_html_editor_selection_restore (EHTMLEditorSelection *selection)
                webkit_dom_node_normalize (parent_start);
                webkit_dom_node_normalize (parent_end);
        }
+
+       if (start_is_anchor) {
+               anchor = webkit_dom_range_get_end_container (range, NULL);
+               offset = webkit_dom_range_get_end_offset (range, NULL);
+
+               webkit_dom_range_collapse (range, TRUE, NULL);
+       } else {
+               anchor = webkit_dom_range_get_start_container (range, NULL);
+               offset = webkit_dom_range_get_start_offset (range, NULL);
+
+               webkit_dom_range_collapse (range, FALSE, NULL);
+       }
        webkit_dom_dom_selection_add_range (dom_selection, range);
+       webkit_dom_dom_selection_extend (dom_selection, anchor, offset, NULL);
 }
 
 void