[gtk+/wip/renderops: 4/6] inspector: Add a description vfunc for render operations

[Benjamin Otte <otte src gnome org>]

commit 5da78ac0c5a33f66b7314b57eade828e9c2dc538
Author: Benjamin Otte <otte redhat com>
Date:   Tue Jun 30 02:33:18 2015 +0200

    inspector: Add a description vfunc for render operations

 gtk/inspector/gtkrenderoperation.c       |   15 +++++++++++++++
 gtk/inspector/gtkrenderoperation.h       |    2 ++
 gtk/inspector/gtkrenderoperationcairo.c  |    7 +++++++
 gtk/inspector/gtkrenderoperationwidget.c |   10 ++++++++++
 gtk/inspector/gtkrenderoperationwidget.h |    1 +
 gtk/inspector/snapshot.c                 |    6 ++++--
 6 files changed, 39 insertions(+), 2 deletions(-)
---
diff --git a/gtk/inspector/gtkrenderoperation.c b/gtk/inspector/gtkrenderoperation.c
index 5e0520d..e2950c7 100644
--- a/gtk/inspector/gtkrenderoperation.c
+++ b/gtk/inspector/gtkrenderoperation.c
@@ -37,6 +37,12 @@ gtk_render_operation_real_get_matrix (GtkRenderOperation *operation,
   cairo_matrix_init_identity (matrix);
 }
 
+static char *
+gtk_render_operation_real_describe (GtkRenderOperation *operation)
+{
+  return g_strdup (G_OBJECT_TYPE_NAME (operation));
+}
+
 static void
 gtk_render_operation_real_draw (GtkRenderOperation *operation,
                                 cairo_t            *cr)
@@ -48,6 +54,7 @@ gtk_render_operation_class_init (GtkRenderOperationClass *klass)
 {
   klass->get_clip = gtk_render_operation_real_get_clip;
   klass->get_matrix = gtk_render_operation_real_get_matrix;
+  klass->describe = gtk_render_operation_real_describe;
   klass->draw = gtk_render_operation_real_draw;
 }
 
@@ -76,6 +83,14 @@ gtk_render_operation_get_matrix (GtkRenderOperation *operation,
   GTK_RENDER_OPERATION_GET_CLASS (operation)->get_matrix (operation, matrix);
 }
 
+char *
+gtk_render_operation_describe (GtkRenderOperation *operation)
+{
+  g_return_val_if_fail (GTK_IS_RENDER_OPERATION (operation), NULL);
+
+  return GTK_RENDER_OPERATION_GET_CLASS (operation)->describe (operation);
+}
+
 void
 gtk_render_operation_draw (GtkRenderOperation *operation,
                            cairo_t            *cr)
diff --git a/gtk/inspector/gtkrenderoperation.h b/gtk/inspector/gtkrenderoperation.h
index e12f0d2..9597a8e 100644
--- a/gtk/inspector/gtkrenderoperation.h
+++ b/gtk/inspector/gtkrenderoperation.h
@@ -50,6 +50,7 @@ struct _GtkRenderOperationClass
   void          (* get_matrix)                          (GtkRenderOperation      *operation,
                                                          cairo_matrix_t          *matrix);
 
+  char *        (* describe)                            (GtkRenderOperation      *operation);
   void          (* draw)                                (GtkRenderOperation      *operation,
                                                          cairo_t                 *cr);
 };
@@ -61,6 +62,7 @@ void            gtk_render_operation_get_clip           (GtkRenderOperation
 void            gtk_render_operation_get_matrix         (GtkRenderOperation      *operation,
                                                          cairo_matrix_t          *matrix);
 
+char *          gtk_render_operation_describe           (GtkRenderOperation      *operation);
 void            gtk_render_operation_draw               (GtkRenderOperation      *operation,
                                                          cairo_t                 *cr);
 
diff --git a/gtk/inspector/gtkrenderoperationcairo.c b/gtk/inspector/gtkrenderoperationcairo.c
index ce9e30f..1116bbd 100644
--- a/gtk/inspector/gtkrenderoperationcairo.c
+++ b/gtk/inspector/gtkrenderoperationcairo.c
@@ -45,6 +45,12 @@ gtk_render_operation_cairo_get_clip (GtkRenderOperation    *operation,
   clip->height = ceil (extents.y + extents.height) - clip->y;
 }
 
+static char *
+gtk_render_operation_cairo_describe (GtkRenderOperation *operation)
+{
+  return g_strdup ("custom rendering");
+}
+
 static void
 gtk_render_operation_cairo_draw (GtkRenderOperation *operation,
                                  cairo_t            *cr)
@@ -74,6 +80,7 @@ gtk_render_operation_cairo_class_init (GtkRenderOperationCairoClass *klass)
   object_class->finalize = gtk_render_operation_cairo_finalize;
 
   operation_class->get_clip = gtk_render_operation_cairo_get_clip;
+  operation_class->describe = gtk_render_operation_cairo_describe;
   operation_class->draw = gtk_render_operation_cairo_draw;
 }
 
diff --git a/gtk/inspector/gtkrenderoperationwidget.c b/gtk/inspector/gtkrenderoperationwidget.c
index c1d151b..9a7c73e 100644
--- a/gtk/inspector/gtkrenderoperationwidget.c
+++ b/gtk/inspector/gtkrenderoperationwidget.c
@@ -41,6 +41,14 @@ gtk_render_operation_widget_get_matrix (GtkRenderOperation *operation,
   *matrix = oper->matrix;
 }
 
+static char *
+gtk_render_operation_widget_describe (GtkRenderOperation *operation)
+{
+  GtkRenderOperationWidget *oper = GTK_RENDER_OPERATION_WIDGET (operation);
+
+  return g_strdup (g_type_name (oper->widget_type));
+}
+
 static void
 gtk_render_operation_widget_draw (GtkRenderOperation *operation,
                                   cairo_t            *cr)
@@ -81,6 +89,7 @@ gtk_render_operation_widget_class_init (GtkRenderOperationWidgetClass *klass)
 
   operation_class->get_clip = gtk_render_operation_widget_get_clip;
   operation_class->get_matrix = gtk_render_operation_widget_get_matrix;
+  operation_class->describe = gtk_render_operation_widget_describe;
   operation_class->draw = gtk_render_operation_widget_draw;
 }
 
@@ -100,6 +109,7 @@ gtk_render_operation_widget_new (GtkWidget      *widget,
 
   result = g_object_new (GTK_TYPE_RENDER_OPERATION_WIDGET, NULL);
   
+  result->widget_type = G_OBJECT_TYPE (widget);
   gtk_widget_get_allocation (widget, &result->widget_allocation);
   gtk_widget_get_clip (widget, &result->widget_clip);
   result->widget_clip.x -= result->widget_allocation.x;
diff --git a/gtk/inspector/gtkrenderoperationwidget.h b/gtk/inspector/gtkrenderoperationwidget.h
index 652840d..cdd0c90 100644
--- a/gtk/inspector/gtkrenderoperationwidget.h
+++ b/gtk/inspector/gtkrenderoperationwidget.h
@@ -40,6 +40,7 @@ struct _GtkRenderOperationWidget
 {
   GtkRenderOperation parent;
   
+  GType                  widget_type;
   GtkAllocation          widget_allocation;
   GtkAllocation          widget_clip;
   cairo_matrix_t         matrix;
diff --git a/gtk/inspector/snapshot.c b/gtk/inspector/snapshot.c
index 4c9ee59..1892270 100644
--- a/gtk/inspector/snapshot.c
+++ b/gtk/inspector/snapshot.c
@@ -161,13 +161,15 @@ gtk_inspector_snapshot_fill_listbox (GtkInspectorSnapshot *snapshot,
                                      guint                 depth)
 {
   GtkWidget *label, *row;
-  char *text;
+  char *text, *description;
 
-  text = g_strdup_printf ("%*s %s", 2 * depth, "", G_OBJECT_TYPE_NAME (oper));
+  description = gtk_render_operation_describe (oper);
+  text = g_strdup_printf ("%*s %s", 2 * depth, "", description);
   label = gtk_label_new (text);
   gtk_label_set_xalign (GTK_LABEL (label), 0.0);
   gtk_widget_show (label);
   g_free (text);
+  g_free (description);
 
   row = gtk_list_box_row_new ();
   gtk_container_add (GTK_CONTAINER (row), label);