[libchamplain] ChamplainTile: Implement ChamplainExportable

[Jiří Techet <jiritechet src gnome org>]

commit e50da6817569186ae854fdb2ac7453accb38077e
Author: Jonas Danielsson <jonas threetimestwo org>
Date:   Thu Nov 12 11:55:42 2015 +0100

    ChamplainTile: Implement ChamplainExportable
    
    https://bugzilla.gnome.org/show_bug.cgi?id=757350

 champlain/champlain-tile.c |   60 ++++++++++++++++++++++++++++++++++++++++++-
 champlain/champlain-tile.h |    1 +
 2 files changed, 59 insertions(+), 2 deletions(-)
---
diff --git a/champlain/champlain-tile.c b/champlain/champlain-tile.c
index ec48007..4c2e6d1 100644
--- a/champlain/champlain-tile.c
+++ b/champlain/champlain-tile.c
@@ -35,8 +35,15 @@
 #include <libsoup/soup.h>
 #include <gio/gio.h>
 #include <clutter/clutter.h>
+#include <cairo-gobject.h>
 
-G_DEFINE_TYPE (ChamplainTile, champlain_tile, CLUTTER_TYPE_ACTOR)
+static void set_surface (ChamplainExportable *exportable,
+    cairo_surface_t *surface);
+static cairo_surface_t *get_surface (ChamplainExportable *exportable);
+static void exportable_interface_init (ChamplainExportableIface *iface);
+
+G_DEFINE_TYPE_WITH_CODE (ChamplainTile, champlain_tile, CLUTTER_TYPE_ACTOR,
+    G_IMPLEMENT_INTERFACE (CHAMPLAIN_TYPE_EXPORTABLE, exportable_interface_init));
 
 #define GET_PRIVATE(o) \
   (G_TYPE_INSTANCE_GET_PRIVATE ((o), CHAMPLAIN_TYPE_TILE, ChamplainTilePrivate))
@@ -52,7 +59,8 @@ enum
   PROP_STATE,
   PROP_CONTENT,
   PROP_ETAG,
-  PROP_FADE_IN
+  PROP_FADE_IN,
+  PROP_SURFACE
 };
 
 enum
@@ -79,6 +87,7 @@ struct _ChamplainTilePrivate
   GTimeVal *modified_time; /* The last modified time of the cache */
   gchar *etag; /* The HTTP ETag sent by the server */
   gboolean content_displayed;
+  cairo_surface_t *surface;
 };
 
 static void
@@ -123,6 +132,10 @@ champlain_tile_get_property (GObject *object,
       g_value_set_boolean (value, champlain_tile_get_fade_in (self));
       break;
 
+    case PROP_SURFACE:
+      g_value_set_boxed (value, get_surface (CHAMPLAIN_EXPORTABLE (self)));
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
     }
@@ -171,6 +184,10 @@ champlain_tile_set_property (GObject *object,
       champlain_tile_set_fade_in (self, g_value_get_boolean (value));
       break;
 
+    case PROP_SURFACE:
+      set_surface (CHAMPLAIN_EXPORTABLE (self), g_value_get_boxed (value));
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
     }
@@ -188,6 +205,7 @@ champlain_tile_dispose (GObject *object)
       priv->content_actor = NULL;
     }
 
+  g_clear_pointer (&priv->surface, cairo_surface_destroy);
   G_OBJECT_CLASS (champlain_tile_parent_class)->dispose (object);
 }
 
@@ -348,6 +366,10 @@ champlain_tile_class_init (ChamplainTileClass *klass)
           FALSE,
           G_PARAM_READWRITE));
 
+    g_object_class_override_property (object_class,
+      PROP_SURFACE,
+      "surface");
+
   /**
    * ChamplainTile::render-complete:
    * @self: a #ChamplainTile
@@ -395,6 +417,40 @@ champlain_tile_init (ChamplainTile *self)
 }
 
 
+static void
+set_surface (ChamplainExportable *exportable,
+     cairo_surface_t *surface)
+{
+  g_return_if_fail (CHAMPLAIN_TILE (exportable));
+  g_return_if_fail (surface != NULL);
+
+  ChamplainTile *self = CHAMPLAIN_TILE (exportable);
+
+  if (self->priv->surface == surface)
+    return;
+
+  cairo_surface_destroy (self->priv->surface);
+  self->priv->surface = cairo_surface_reference (surface);
+  g_object_notify (G_OBJECT (self), "surface");
+}
+
+
+static cairo_surface_t *
+get_surface (ChamplainExportable *exportable)
+{
+  g_return_val_if_fail (CHAMPLAIN_IS_TILE (exportable), NULL);
+
+  return CHAMPLAIN_TILE (exportable)->priv->surface;
+}
+
+
+static void
+exportable_interface_init (ChamplainExportableIface *iface)
+{
+  iface->get_surface = get_surface;
+  iface->set_surface = set_surface;
+}
+
 /**
  * champlain_tile_new:
  *
diff --git a/champlain/champlain-tile.h b/champlain/champlain-tile.h
index 8ebac55..ca2224b 100644
--- a/champlain/champlain-tile.h
+++ b/champlain/champlain-tile.h
@@ -21,6 +21,7 @@
 #define CHAMPLAIN_MAP_TILE_H
 
 #include <champlain/champlain-defines.h>
+#include <champlain/champlain-exportable.h>
 
 #include <glib.h>
 #include <clutter/clutter.h>