[evolution/webkit-composer] Implement function to enable spellcheck

[Tomas Popela <tpopela src gnome org>]

commit 21f690b6c7ac9ddf2c5db82d34b8906519f666fa
Author: Tomas Popela <tpopela redhat com>
Date:   Fri Oct 11 13:43:42 2013 +0200

    Implement function to enable spellcheck

 e-util/e-editor-widget.c |  103 ++++++++++++++++++++++++++++++++++++---------
 e-util/e-editor-widget.h |    2 +
 2 files changed, 84 insertions(+), 21 deletions(-)
---
diff --git a/e-util/e-editor-widget.c b/e-util/e-editor-widget.c
index ba36d84..ce20b1f 100644
--- a/e-util/e-editor-widget.c
+++ b/e-util/e-editor-widget.c
@@ -215,6 +215,28 @@ editor_widget_selection_changed_cb (EEditorWidget *widget,
        }
 }
 
+static void
+move_caret_into_element (WebKitDOMDocument *document,
+                        WebKitDOMElement *element)
+{
+       WebKitDOMDOMWindow *window;
+       WebKitDOMDOMSelection *window_selection;
+       WebKitDOMRange *new_range;
+
+       if (!element)
+               return;
+
+       window = webkit_dom_document_get_default_view (document);
+       window_selection = webkit_dom_dom_window_get_selection (window);
+       new_range = webkit_dom_document_create_range (document);
+
+       webkit_dom_range_select_node_contents (
+               new_range, WEBKIT_DOM_NODE (element), NULL);
+       webkit_dom_range_collapse (new_range, FALSE, NULL);
+       webkit_dom_dom_selection_remove_all_ranges (window_selection);
+       webkit_dom_dom_selection_add_range (window_selection, new_range);
+}
+
 static gboolean
 editor_widget_should_show_delete_interface_for_element (EEditorWidget *widget,
                                                         WebKitDOMHTMLElement *element)
@@ -222,36 +244,75 @@ editor_widget_should_show_delete_interface_for_element (EEditorWidget *widget,
        return FALSE;
 }
 
-static void
-editor_widget_load_status_changed (EEditorWidget *widget)
+static gint
+get_word_count_in_element (WebKitDOMHTMLElement *element) {
+       gchar *inner_text;
+       gchar **words;
+       gint count;
+
+       inner_text = webkit_dom_html_element_get_inner_text (element);
+       words = g_strsplit (inner_text, " ", 0);
+       count = g_strv_length (words);
+       g_strfreev (words);
+       g_free (inner_text);
+
+       return count;
+}
+
+void
+e_editor_widget_force_spellcheck (EEditorWidget *widget)
 {
-       WebKitLoadStatus status;
+       EEditorSelection *selection;
+       gint ii, word_count;
        WebKitDOMDocument *document;
+       WebKitDOMDOMSelection *dom_selection;
        WebKitDOMDOMWindow *window;
-       WebKitDOMDOMSelection *selection;
-       WebKitDOMRange *range;
+       WebKitDOMHTMLElement *body;
 
-       status = webkit_web_view_get_load_status (WEBKIT_WEB_VIEW (widget));
-       if (status != WEBKIT_LOAD_FINISHED) {
-               return;
+       document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (widget));
+       window = webkit_dom_document_get_default_view (document);
+       dom_selection = webkit_dom_dom_window_get_selection (window);
+
+       /* Enable spellcheck in composer */
+       body = webkit_dom_document_get_body (document);
+       webkit_dom_element_set_attribute (
+               WEBKIT_DOM_ELEMENT (body),
+               "spellcheck",
+               "true",
+               NULL);
+
+       selection = e_editor_widget_get_selection (widget);
+
+       e_editor_selection_save_caret_position (selection);
+
+       if (!webkit_dom_document_get_element_by_id (document, "-x-evo-caret-position")) {
+               move_caret_into_element (
+                       document,
+                       WEBKIT_DOM_ELEMENT (webkit_dom_document_get_body (document)));
+               e_editor_selection_save_caret_position (selection);
        }
 
-       widget->priv->reload_in_progress = FALSE;
+       webkit_dom_dom_selection_modify (dom_selection, "move", "backward", "documentboundary");
 
-       /* After reload, there is no selection in the document. Fix it. */
-       document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (widget));
-       window = webkit_dom_document_get_default_view (document);
-       selection = webkit_dom_dom_window_get_selection (window);
+       /* Go through all words to spellcheck them. To avoid this we have to wait for
+        * http://www.w3.org/html/wg/drafts/html/master/editing.html#dom-forcespellcheck */
+       word_count = get_word_count_in_element (body);
+       for (ii = 0; ii < word_count; ii++)
+               webkit_dom_dom_selection_modify (dom_selection, "move", "forward", "word");
 
-       range = webkit_dom_document_create_range (document);
-       webkit_dom_range_set_start (
-               range, WEBKIT_DOM_NODE (webkit_dom_document_get_body (document)),
-               0, NULL);
-       webkit_dom_range_set_end (
-               range, WEBKIT_DOM_NODE (webkit_dom_document_get_body (document)),
-               0, NULL);
+       e_editor_selection_restore_caret_position (selection);
+}
 
-       webkit_dom_dom_selection_add_range (selection, range);
+static void
+editor_widget_load_status_changed (EEditorWidget *widget)
+{
+       WebKitLoadStatus status;
+
+       status = webkit_web_view_get_load_status (WEBKIT_WEB_VIEW (widget));
+       if (status != WEBKIT_LOAD_FINISHED)
+               return;
+
+       widget->priv->reload_in_progress = FALSE;
 
        /* Dispatch queued operations */
        while (widget->priv->postreload_operations &&
diff --git a/e-util/e-editor-widget.h b/e-util/e-editor-widget.h
index 9af32b5..0e08e0c 100644
--- a/e-util/e-editor-widget.h
+++ b/e-util/e-editor-widget.h
@@ -117,6 +117,8 @@ void                e_editor_widget_quote_plain_text
                                                (EEditorWidget *widget);
 void           e_editor_widget_dequote_plain_text
                                                (EEditorWidget *widget);
+void           e_editor_widget_force_spellcheck
+                                               (EEditorWidget *widget);
 G_END_DECLS
 
 #endif /* E_EDITOR_WIDGET_H */