[epiphany/wip/editor-state] window: Check context menu item sensitivity using editor state

[Michael Catanzaro <mcatanzaro src gnome org>]

commit b6ea20af2c43938a9fe6518d68053e36cdfe797b
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Tue Sep 26 16:34:11 2017 -0500

    window: Check context menu item sensitivity using editor state
    
    This allows us to get the context menu right without flickering.
    Notably, we can now hide the copy context menu item once again, without
    flickering, when it is not available.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772106

 src/ephy-window.c |   99 ++++++++++++++---------------------------------------
 1 files changed, 26 insertions(+), 73 deletions(-)
---
diff --git a/src/ephy-window.c b/src/ephy-window.c
index 05dd005..8d6f037 100644
--- a/src/ephy-window.c
+++ b/src/ephy-window.c
@@ -644,56 +644,11 @@ update_edit_action_sensitivity (EphyWindow *window, const char *action_name, gbo
   g_simple_action_set_enabled (G_SIMPLE_ACTION (action), sensitive || hide);
 }
 
-typedef struct {
-  EphyWindow *window;
-  const char *action_name;
-  gboolean hide;
-} CanEditCommandAsyncData;
-
-static CanEditCommandAsyncData *
-can_edit_command_async_data_new (EphyWindow *window, const gchar *action_name, gboolean hide)
-{
-  CanEditCommandAsyncData *data;
-
-  data = g_slice_new (CanEditCommandAsyncData);
-  data->window = g_object_ref (window);
-  data->action_name = action_name;
-  data->hide = hide;
-
-  return data;
-}
-
-static void
-can_edit_command_async_data_free (CanEditCommandAsyncData *data)
-{
-  if (G_UNLIKELY (!data))
-    return;
-
-  g_object_unref (data->window);
-  g_slice_free (CanEditCommandAsyncData, data);
-}
-
-static void
-can_edit_command_callback (GObject *object, GAsyncResult *result, CanEditCommandAsyncData *data)
-{
-  gboolean sensitive;
-  GError *error = NULL;
-
-  sensitive = webkit_web_view_can_execute_editing_command_finish (WEBKIT_WEB_VIEW (object), result, &error);
-  if (!error) {
-    update_edit_action_sensitivity (data->window, data->action_name, sensitive, data->hide);
-  } else {
-    g_error_free (error);
-  }
-
-  can_edit_command_async_data_free (data);
-}
-
 static void
 update_edit_actions_sensitivity (EphyWindow *window, gboolean hide)
 {
   GtkWidget *widget = gtk_window_get_focus (GTK_WINDOW (window));
-  gboolean can_copy, can_cut, can_undo, can_redo, can_paste;
+  gboolean can_cut, can_copy, can_undo, can_redo, can_paste;
 
   if (GTK_IS_EDITABLE (widget)) {
     EphyTitleWidget *title_widget;
@@ -703,8 +658,8 @@ update_edit_actions_sensitivity (EphyWindow *window, gboolean hide)
 
     has_selection = gtk_editable_get_selection_bounds (GTK_EDITABLE (widget), NULL, NULL);
 
-    can_copy = has_selection;
     can_cut = has_selection;
+    can_copy = has_selection;
     can_paste = TRUE;
     can_undo = EPHY_IS_LOCATION_ENTRY (title_widget) &&
                ephy_location_entry_get_can_undo (EPHY_LOCATION_ENTRY (title_widget));
@@ -713,34 +668,19 @@ update_edit_actions_sensitivity (EphyWindow *window, gboolean hide)
   } else {
     EphyEmbed *embed;
     WebKitWebView *view;
-    CanEditCommandAsyncData *data;
+    WebKitEditorState *state;
 
     embed = window->active_embed;
     g_assert (embed != NULL);
 
     view = EPHY_GET_WEBKIT_WEB_VIEW_FROM_EMBED (embed);
+    state = webkit_web_view_get_editor_state (view);
 
-    data = can_edit_command_async_data_new (window, "copy", hide);
-    webkit_web_view_can_execute_editing_command (view, WEBKIT_EDITING_COMMAND_COPY, NULL,
-                                                 (GAsyncReadyCallback)can_edit_command_callback,
-                                                 data);
-    data = can_edit_command_async_data_new (window, "cut", hide);
-    webkit_web_view_can_execute_editing_command (view, WEBKIT_EDITING_COMMAND_CUT, NULL,
-                                                 (GAsyncReadyCallback)can_edit_command_callback,
-                                                 data);
-    data = can_edit_command_async_data_new (window, "paste", hide);
-    webkit_web_view_can_execute_editing_command (view, WEBKIT_EDITING_COMMAND_PASTE, NULL,
-                                                 (GAsyncReadyCallback)can_edit_command_callback,
-                                                 data);
-    data = can_edit_command_async_data_new (window, "undo", hide);
-    webkit_web_view_can_execute_editing_command (view, WEBKIT_EDITING_COMMAND_UNDO, NULL,
-                                                 (GAsyncReadyCallback)can_edit_command_callback,
-                                                 data);
-    data = can_edit_command_async_data_new (window, "redo", hide);
-    webkit_web_view_can_execute_editing_command (view, WEBKIT_EDITING_COMMAND_REDO, NULL,
-                                                 (GAsyncReadyCallback)can_edit_command_callback,
-                                                 data);
-    return;
+    can_cut = webkit_editor_state_get_is_cut_available (state);
+    can_copy = webkit_editor_state_get_is_copy_available (state);
+    can_paste = webkit_editor_state_get_is_paste_available (state);
+    can_undo = webkit_editor_state_get_is_undo_available (state);
+    can_redo = webkit_editor_state_get_is_redo_available (state);
   }
 
   update_edit_action_sensitivity (window, "cut", can_cut, hide);
@@ -1393,6 +1333,16 @@ find_spelling_guess_context_menu_items (WebKitContextMenu *context_menu)
   return g_list_reverse (retval);
 }
 
+static gboolean
+should_show_copy_outside_editable (WebKitWebView *view)
+{
+  WebKitEditorState *state;
+
+  state = webkit_web_view_get_editor_state (view);
+
+  return webkit_editor_state_get_is_copy_available (state);
+}
+
 static void
 parse_context_menu_user_data (WebKitContextMenu *context_menu,
                               const char       **selected_text)
@@ -1519,8 +1469,10 @@ populate_context_menu (WebKitWebView       *web_view,
       webkit_context_menu_append (context_menu,
                                   webkit_context_menu_item_new_separator ());
     }
-    add_action_to_context_menu (context_menu, window_action_group,
-                                "copy", window);
+
+    if (should_show_copy_outside_editable (web_view))
+      add_action_to_context_menu (context_menu, window_action_group,
+                                  "copy", window);
     if (can_search_selection)
       add_action_to_context_menu (context_menu, popup_action_group,
                                   search_selection_action_name, window);
@@ -1597,8 +1549,9 @@ populate_context_menu (WebKitWebView       *web_view,
                                   webkit_context_menu_item_new_separator ());
     }
 
-    add_action_to_context_menu (context_menu, window_action_group,
-                                "copy", window);
+    if (should_show_copy_outside_editable (web_view))
+      add_action_to_context_menu (context_menu, window_action_group,
+                                  "copy", window);
     if (can_search_selection)
       add_action_to_context_menu (context_menu, popup_action_group,
                                   search_selection_action_name, window);