[gtk/wip/ebassi/constraint-layout: 54/69] constraint layout: Add debug output for guides

[Emmanuele Bassi <ebassi src gnome org>]

commit 90f8dcc5e18aad2e6e6f3b92e8bce7074eba9bab
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jun 28 22:55:39 2019 +0000

    constraint layout: Add debug output for guides
    
    Print out the allocation we end up giving to
    guides. This helps in making sense of the
    allocations of the child widgets that these
    guides relate to.

 gtk/gtkconstraintlayout.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
---
diff --git a/gtk/gtkconstraintlayout.c b/gtk/gtkconstraintlayout.c
index 378e7840af..23bf8631c6 100644
--- a/gtk/gtkconstraintlayout.c
+++ b/gtk/gtkconstraintlayout.c
@@ -974,6 +974,30 @@ gtk_constraint_solver_add_constraint (solver,
                                 child_baseline);
     }
 
+#ifdef G_ENABLE_DEBUG
+  if (GTK_DEBUG_CHECK (LAYOUT))
+    {
+      GHashTableIter iter;
+      gpointer key;
+      g_hash_table_iter_init (&iter, self->guides);
+      while (g_hash_table_iter_next (&iter, &key, NULL))
+        {
+          GtkConstraintGuide *guide = key;
+          GtkConstraintVariable *var_top, *var_left, *var_width, *var_height;
+          var_top = gtk_constraint_guide_get_attribute (guide, GTK_CONSTRAINT_ATTRIBUTE_TOP);
+          var_left = gtk_constraint_guide_get_attribute (guide, GTK_CONSTRAINT_ATTRIBUTE_LEFT);
+          var_width = gtk_constraint_guide_get_attribute (guide, GTK_CONSTRAINT_ATTRIBUTE_WIDTH);
+          var_height = gtk_constraint_guide_get_attribute (guide, GTK_CONSTRAINT_ATTRIBUTE_HEIGHT);
+          g_print ("Allocating guide '%s'[%p] with { .x: %g .y: %g .w: %g .h: %g }\n",
+                   gtk_constraint_guide_get_name (guide), guide,
+                   gtk_constraint_variable_get_value (var_left),
+                   gtk_constraint_variable_get_value (var_top),
+                   gtk_constraint_variable_get_value (var_width),
+                   gtk_constraint_variable_get_value (var_height));
+        }
+    }
+#endif
+
   /* The constraints on the children sizes can be removed now */
   for (guint i = 0; i < size_constraints->len; i++)
     {