[epiphany] ephy-history-view: add row-middle-clicked signal

[Claudio Saavedra <csaavedra src gnome org>]

commit 12c233832347dddfe64ac842998e043692ecb2be
Author: Claudio Saavedra <csaavedra igalia com>
Date:   Thu Mar 8 11:59:03 2012 +0200

    ephy-history-view: add row-middle-clicked signal
    
    https://bugzilla.gnome.org/show_bug.cgi?id=671635

 lib/widgets/ephy-history-view.c |   69 +++++++++++++++++++++++++++++++++++++++
 lib/widgets/ephy-history-view.h |    5 +++
 2 files changed, 74 insertions(+), 0 deletions(-)
---
diff --git a/lib/widgets/ephy-history-view.c b/lib/widgets/ephy-history-view.c
index 461d308..27d45ae 100644
--- a/lib/widgets/ephy-history-view.c
+++ b/lib/widgets/ephy-history-view.c
@@ -27,8 +27,21 @@
 #include <glib/gi18n.h>
 #include <gtk/gtk.h>
 
+#define EPHY_HISTORY_VIEW_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_HISTORY_VIEW, EphyHistoryViewPrivate))
+
+struct _EphyHistoryViewPrivate
+{
+  GtkTreePath *pressed_path;
+};
+
 G_DEFINE_TYPE (EphyHistoryView, ephy_history_view, GTK_TYPE_TREE_VIEW)
 
+enum {
+	ROW_MIDDLE_CLICKED,
+	LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL];
 
 static gboolean
 button_event_modifies_selection (GdkEventButton *event)
@@ -40,6 +53,7 @@ static gboolean
 ephy_history_view_button_press (GtkWidget *treeview,
                                 GdkEventButton *event)
 {
+  EphyHistoryView *view;
   GtkTreeSelection *selection;
   GtkTreePath *path = NULL;
   gboolean path_is_selected, call_parent = TRUE;
@@ -73,6 +87,11 @@ ephy_history_view_button_press (GtkWidget *treeview,
       gboolean retval;
 
       g_signal_emit_by_name (treeview, "popup_menu", &retval);
+    } else if (event->button == 2) {
+      view = EPHY_HISTORY_VIEW (treeview);
+      if (view->priv->pressed_path)
+        gtk_tree_path_free (view->priv->pressed_path);
+      view->priv->pressed_path = gtk_tree_path_copy (path);
     }
     gtk_tree_path_free (path);
   }
@@ -80,12 +99,60 @@ ephy_history_view_button_press (GtkWidget *treeview,
   return FALSE;
 }
 
+static gboolean
+ephy_history_view_button_release (GtkWidget *treeview,
+                                  GdkEventButton *event)
+{
+  EphyHistoryView *view;
+  GtkTreePath *path;
+
+  view = EPHY_HISTORY_VIEW (treeview);
+
+  if (view->priv->pressed_path && event->button == 2 &&
+      gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (treeview),
+                                     event->x,
+                                     event->y,
+                                     &path,
+                                     NULL, NULL, NULL)) {
+    if (gtk_tree_path_compare (view->priv->pressed_path, path) == 0)
+      g_signal_emit (view, signals[ROW_MIDDLE_CLICKED], 0, path);
+    gtk_tree_path_free (path);
+  }
+
+  return FALSE;
+}
+
+static void
+ephy_history_view_finalize (GObject *object)
+{
+  EphyHistoryView *view = EPHY_HISTORY_VIEW (object);
+
+  if (view->priv->pressed_path)
+    gtk_tree_path_free (view->priv->pressed_path);
+
+  G_OBJECT_CLASS (ephy_history_view_parent_class)->finalize (object);
+}
+
 static void
 ephy_history_view_class_init (EphyHistoryViewClass *klass)
 {
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
+  object_class->finalize = ephy_history_view_finalize;
   widget_class->button_press_event = ephy_history_view_button_press;
+  widget_class->button_release_event = ephy_history_view_button_release;
+
+  signals[ROW_MIDDLE_CLICKED] = g_signal_new ("row-middle-clicked",
+                                              G_OBJECT_CLASS_TYPE (klass),
+                                              G_SIGNAL_RUN_LAST,
+                                              G_STRUCT_OFFSET (EphyHistoryViewClass, row_middle_clicked),
+                                              NULL, NULL,
+                                              g_cclosure_marshal_VOID__POINTER,
+                                              G_TYPE_NONE,
+                                              1,
+                                              G_TYPE_POINTER);
+  g_type_class_add_private (object_class, sizeof (EphyHistoryViewPrivate));
 }
 
 static void
@@ -93,6 +160,8 @@ ephy_history_view_init (EphyHistoryView *self)
 {
   GtkTreeSelection *selection;
 
+  self->priv = EPHY_HISTORY_VIEW_GET_PRIVATE (self);
+
   selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (self));
   gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
 }
diff --git a/lib/widgets/ephy-history-view.h b/lib/widgets/ephy-history-view.h
index d6c2d06..3a502ed 100644
--- a/lib/widgets/ephy-history-view.h
+++ b/lib/widgets/ephy-history-view.h
@@ -40,10 +40,15 @@ typedef struct _EphyHistoryViewPrivate     EphyHistoryViewPrivate;
 
 struct _EphyHistoryView {
   GtkTreeView parent;
+
+  /*< private >*/
+  EphyHistoryViewPrivate *priv;
 };
 
 struct _EphyHistoryViewClass {
   GtkTreeViewClass parent_class;
+
+  void (* row_middle_clicked) (EphyHistoryView *view, GtkTreePath *path);
 };
 
 GType       ephy_history_view_get_type      (void) G_GNUC_CONST;