Introduce GtkIcon private class

This is an utility widget that wraps a GtkBuiltinIcon for situations
where using a real widget is more convenient than a gadget.

1 files changed, 223 insertions, 0 deletions

diff --git a/gtk/gtkicon.c b/gtk/gtkicon.c
new file mode 100644
index 0000000000..06c19dc69f
--- /dev/null
+++ b/gtk/gtkicon.c
@@ -0,0 +1,223 @@
+
+/*
+ * Copyright © 2015 Endless Mobile, Inc.
+ *
+ * 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 2.1 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/>.
+ *
+ * Authors: Cosimo Cecchi <cosimoc@gnome.org>
+ */
+
+#include "config.h"
+
+#include "gtkbuiltiniconprivate.h"
+#include "gtkcssnodeprivate.h"
+#include "gtkiconprivate.h"
+#include "gtkwidgetprivate.h"
+
+enum {
+  PROP_0,
+  PROP_CSS_NAME,
+  NUM_PROPERTIES
+};
+
+static GParamSpec *icon_props[NUM_PROPERTIES] = { NULL, };
+
+typedef struct _GtkIconPrivate GtkIconPrivate;
+struct _GtkIconPrivate {
+  GtkCssGadget *gadget;
+};
+
+G_DEFINE_TYPE_WITH_PRIVATE (GtkIcon, gtk_icon, GTK_TYPE_WIDGET)
+
+static void
+gtk_icon_finalize (GObject *object)
+{
+  GtkIcon *self = GTK_ICON (object);
+  GtkIconPrivate *priv = gtk_icon_get_instance_private (self);
+
+  g_clear_object (&priv->gadget);
+
+  G_OBJECT_CLASS (gtk_icon_parent_class)->finalize (object);
+}
+
+static void
+gtk_icon_get_property (GObject      *object,
+                       guint         property_id,
+                       GValue       *value,
+                       GParamSpec   *pspec)
+{
+  GtkIcon *self = GTK_ICON (object);
+
+  switch (property_id)
+    {
+    case PROP_CSS_NAME:
+      g_value_set_string (value, gtk_icon_get_css_name (self));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gtk_icon_set_property (GObject      *object,
+                       guint         property_id,
+                       const GValue *value,
+                       GParamSpec   *pspec)
+{
+  GtkIcon *self = GTK_ICON (object);
+
+  switch (property_id)
+    {
+    case PROP_CSS_NAME:
+      gtk_icon_set_css_name (self, g_value_get_string (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gtk_icon_get_preferred_height_and_baseline_for_width (GtkWidget *widget,
+                                                      gint       for_width,
+                                                      gint      *minimum,
+                                                      gint      *natural,
+                                                      gint      *minimum_baseline,
+                                                      gint      *natural_baseline)
+{
+  GtkIcon *self = GTK_ICON (widget);
+  GtkIconPrivate *priv = gtk_icon_get_instance_private (self);
+
+  gtk_css_gadget_get_preferred_size (priv->gadget,
+                                     GTK_ORIENTATION_VERTICAL,
+                                     for_width,
+                                     minimum, natural,
+                                     minimum_baseline, natural_baseline);
+}
+
+static void
+gtk_icon_get_preferred_height (GtkWidget *widget,
+                               gint      *minimum,
+                               gint      *natural)
+{
+  gtk_icon_get_preferred_height_and_baseline_for_width (widget, -1,
+                                                        minimum, natural,
+                                                        NULL, NULL);
+}
+
+static void
+gtk_icon_get_preferred_width (GtkWidget *widget,
+                              gint      *minimum,
+                              gint      *natural)
+{
+  GtkIcon *self = GTK_ICON (widget);
+  GtkIconPrivate *priv = gtk_icon_get_instance_private (self);
+
+  gtk_css_gadget_get_preferred_size (priv->gadget,
+                                     GTK_ORIENTATION_HORIZONTAL,
+                                     -1,
+                                     minimum, natural,
+                                     NULL, NULL);
+}
+
+static void
+gtk_icon_size_allocate (GtkWidget     *widget,
+                        GtkAllocation *allocation)
+{
+  GtkIcon *self = GTK_ICON (widget);
+  GtkIconPrivate *priv = gtk_icon_get_instance_private (self);
+  GtkAllocation clip;
+
+  gtk_widget_set_allocation (widget, allocation);
+  gtk_css_gadget_allocate (priv->gadget, allocation,
+                           gtk_widget_get_allocated_baseline (widget),
+                           &clip);
+
+  gtk_widget_set_clip (widget, &clip);
+}
+
+static gboolean
+gtk_icon_draw (GtkWidget *widget,
+               cairo_t   *cr)
+{
+  GtkIcon *self = GTK_ICON (widget);
+  GtkIconPrivate *priv = gtk_icon_get_instance_private (self);
+
+  gtk_css_gadget_draw (priv->gadget, cr);
+
+  return FALSE;
+}
+
+static void
+gtk_icon_class_init (GtkIconClass *klass)
+{
+  GObjectClass *oclass = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *wclass = GTK_WIDGET_CLASS (klass);
+
+  oclass->get_property = gtk_icon_get_property;
+  oclass->set_property = gtk_icon_set_property;
+  oclass->finalize = gtk_icon_finalize;
+
+  wclass->size_allocate = gtk_icon_size_allocate;
+  wclass->get_preferred_width = gtk_icon_get_preferred_width;
+  wclass->get_preferred_height = gtk_icon_get_preferred_height;
+  wclass->get_preferred_height_and_baseline_for_width = gtk_icon_get_preferred_height_and_baseline_for_width;
+  wclass->draw = gtk_icon_draw;
+
+  icon_props[PROP_CSS_NAME] =
+    g_param_spec_string ("css-name", "CSS name",
+                         "CSS name",
+                         NULL,
+                         G_PARAM_READWRITE |
+                         G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
+
+  g_object_class_install_properties (oclass, NUM_PROPERTIES, icon_props);
+}
+
+static void
+gtk_icon_init (GtkIcon *self)
+{
+  GtkWidget *widget = GTK_WIDGET (self);
+  GtkIconPrivate *priv = gtk_icon_get_instance_private (self);
+  GtkCssNode *widget_node;
+
+  gtk_widget_set_has_window (widget, FALSE);
+
+  widget_node = gtk_widget_get_css_node (widget);
+  priv->gadget = gtk_builtin_icon_new_for_node (widget_node, widget);
+}
+
+GtkWidget *
+gtk_icon_new (const char *css_name)
+{
+  return g_object_new (GTK_TYPE_ICON,
+                       "css-name", css_name,
+                       NULL);
+}
+
+const char *
+gtk_icon_get_css_name (GtkIcon *self)
+{
+  GtkCssNode *widget_node = gtk_widget_get_css_node (GTK_WIDGET (self));
+  return gtk_css_node_get_name (widget_node);
+}
+
+void
+gtk_icon_set_css_name (GtkIcon    *self,
+                       const char *css_name)
+{
+  GtkCssNode *widget_node = gtk_widget_get_css_node (GTK_WIDGET (self));
+  gtk_css_node_set_name (widget_node, g_intern_string (css_name));
+}