popover: Add a popover content class

Instead of bending GtkGizmo to the breaking point,
split off a GtkPopoverContent class that just does
what is needed here. Its simpler, and lets us keep
GtkGizmo simpler too.

1 files changed, 88 insertions, 0 deletions

diff --git a/gtk/gtkpopovercontent.c b/gtk/gtkpopovercontent.c
new file mode 100644
index 0000000000..92a299d571
--- /dev/null
+++ b/gtk/gtkpopovercontent.c
@@ -0,0 +1,88 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2021 Red Hat, Inc.
+ *
+ * Authors:
+ * - Matthias Clasen <mclasen@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "gtkpopovercontentprivate.h"
+#include "gtkstylecontextprivate.h"
+
+#include "gtkwidgetprivate.h"
+
+/* A private class used as the child of GtkPopover. The only thing
+ * special here is that we need to queue a resize on the popover when
+ * our shadow changes.
+ */
+
+G_DEFINE_TYPE (GtkPopoverContent, gtk_popover_content, GTK_TYPE_WIDGET);
+
+static void
+gtk_popover_content_css_changed (GtkWidget         *widget,
+                                 GtkCssStyleChange *change)
+{
+  GTK_WIDGET_CLASS (gtk_popover_content_parent_class)->css_changed (widget, change);
+
+  if (change == NULL ||
+      gtk_css_style_change_changes_property (change, GTK_CSS_PROPERTY_BOX_SHADOW))
+    gtk_widget_queue_resize (gtk_widget_get_parent (widget));
+}
+
+static void
+gtk_popover_content_finalize (GObject *object)
+{
+  GtkPopoverContent *self = GTK_POPOVER_CONTENT (object);
+  GtkWidget *widget;
+
+  widget = _gtk_widget_get_first_child (GTK_WIDGET (self));
+  while (widget != NULL)
+    {
+      GtkWidget *next = _gtk_widget_get_next_sibling (widget);
+
+      gtk_widget_unparent (widget);
+
+      widget = next;
+    }
+
+  G_OBJECT_CLASS (gtk_popover_content_parent_class)->finalize (object);
+}
+
+static void
+gtk_popover_content_class_init (GtkPopoverContentClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  object_class->finalize = gtk_popover_content_finalize;
+
+  widget_class->focus = gtk_widget_focus_child;
+  widget_class->grab_focus = gtk_widget_grab_focus_child;
+  widget_class->css_changed = gtk_popover_content_css_changed;
+}
+
+static void
+gtk_popover_content_init (GtkPopoverContent *self)
+{
+}
+
+GtkWidget *
+gtk_popover_content_new (void)
+{
+  return g_object_new (GTK_TYPE_POPOVER_CONTENT,
+                       "css-name", "contents",
+                       "accessible-role", GTK_ACCESSIBLE_ROLE_WIDGET,
+                       NULL);
+}