1 files changed, 112 insertions, 0 deletions
diff --git a/src/gui/gtd-bin-layout.c b/src/gui/gtd-bin-layout.c
new file mode 100644
index 0000000..7f081eb
--- /dev/null
+++ b/src/gui/gtd-bin-layout.c
@@ -0,0 +1,112 @@
+/* gtd-bin-layout.c
+ *
+ * Copyright 2020 Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "gtd-bin-layout.h"
+#include "gtd-widget.h"
+
+struct _GtdBinLayout
+{
+  GtkLayoutManager    parent_instance;
+};
+
+G_DEFINE_TYPE (GtdBinLayout, gtd_bin_layout, GTK_TYPE_LAYOUT_MANAGER)
+
+static void
+gtd_bin_layout_measure (GtkLayoutManager *layout_manager,
+                        GtkWidget        *widget,
+                        GtkOrientation    orientation,
+                        int               for_size,
+                        int              *minimum,
+                        int              *natural,
+                        int              *minimum_baseline,
+                        int              *natural_baseline)
+{
+  GtkWidget *child;
+
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    {
+      if (gtk_widget_should_layout (child))
+        {
+          int child_min = 0;
+          int child_nat = 0;
+          int child_min_baseline = -1;
+          int child_nat_baseline = -1;
+
+          gtk_widget_measure (child, orientation, for_size,
+                              &child_min, &child_nat,
+                              &child_min_baseline, &child_nat_baseline);
+
+          *minimum = MAX (*minimum, child_min);
+          *natural = MAX (*natural, child_nat);
+
+          if (child_min_baseline > -1)
+            *minimum_baseline = MAX (*minimum_baseline, child_min_baseline);
+          if (child_nat_baseline > -1)
+            *natural_baseline = MAX (*natural_baseline, child_nat_baseline);
+        }
+    }
+}
+
+static void
+gtd_bin_layout_allocate (GtkLayoutManager *layout_manager,
+                         GtkWidget        *widget,
+                         int               width,
+                         int               height,
+                         int               baseline)
+{
+  GtkWidget *child;
+
+  for (child = gtk_widget_get_first_child (widget);
+       child != NULL;
+       child = gtk_widget_get_next_sibling (child))
+    {
+      if (child && gtk_widget_should_layout (child))
+        {
+          GskTransform *transform = NULL;
+
+          if (GTD_IS_WIDGET (child))
+            transform = gtd_widget_apply_transform (GTD_WIDGET (child), NULL);
+
+          gtk_widget_allocate (child, width, height, baseline, transform);
+        }
+    }
+}
+
+static void
+gtd_bin_layout_class_init (GtdBinLayoutClass *klass)
+{
+  GtkLayoutManagerClass *layout_manager_class = GTK_LAYOUT_MANAGER_CLASS (klass);
+
+  layout_manager_class->measure = gtd_bin_layout_measure;
+  layout_manager_class->allocate = gtd_bin_layout_allocate;
+}
+
+static void
+gtd_bin_layout_init (GtdBinLayout *self)
+{
+}
+
+GtkLayoutManager*
+gtd_bin_layout_new (void)
+{
+  return g_object_new (GTD_TYPE_BIN_LAYOUT, NULL);
+}