image: Actually report a request mode

This makes height-for-width actually work for GtkImage.

I'm kinda ashamed I didn't notice it not working before.

3 files changed, 27 insertions, 0 deletions

diff --git a/gtk/gtkiconhelper.c b/gtk/gtkiconhelper.c
index ca7e308870..7c2e80abc4 100644
--- a/gtk/gtkiconhelper.c
+++ b/gtk/gtkiconhelper.c
@@ -470,6 +470,22 @@ gtk_icon_helper_new (GtkCssNode *css_node,
   return self;
 }
 
+GtkSizeRequestMode
+gtk_icon_helper_get_request_mode (GtkIconHelper *self)
+{
+  switch (gtk_image_definition_get_storage_type (self->def))
+    {
+    case GTK_IMAGE_PAINTABLE:
+      return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
+
+    case GTK_IMAGE_ICON_NAME:
+    case GTK_IMAGE_GICON:
+    case GTK_IMAGE_EMPTY:
+    default:
+      return GTK_SIZE_REQUEST_CONSTANT_SIZE;
+    }
+}
+
 void
 gtk_icon_helper_measure (GtkIconHelper *self,
                          GtkOrientation orientation,
diff --git a/gtk/gtkiconhelperprivate.h b/gtk/gtkiconhelperprivate.h
index b2d7b819e9..9d770d5902 100644
--- a/gtk/gtkiconhelperprivate.h
+++ b/gtk/gtkiconhelperprivate.h
@@ -64,6 +64,7 @@ GdkPaintable *_gtk_icon_helper_peek_paintable (GtkIconHelper *self);
 GtkImageDefinition *gtk_icon_helper_get_definition (GtkIconHelper *self);
 const gchar *_gtk_icon_helper_get_icon_name (GtkIconHelper *self);
 
+GtkSizeRequestMode gtk_icon_helper_get_request_mode (GtkIconHelper *self);
 void gtk_icon_helper_measure (GtkIconHelper *self,
                               GtkOrientation orientation,
                               int            for_size,
diff --git a/gtk/gtkimage.c b/gtk/gtkimage.c
index f5054495f2..f4ef1f9961 100644
--- a/gtk/gtkimage.c
+++ b/gtk/gtkimage.c
@@ -136,6 +136,15 @@ static GParamSpec *image_props[NUM_PROPERTIES] = { NULL, };
 
 G_DEFINE_TYPE_WITH_PRIVATE (GtkImage, gtk_image, GTK_TYPE_WIDGET)
 
+static GtkSizeRequestMode
+gtk_image_get_request_mode (GtkWidget *widget)
+{
+  GtkImage *image = GTK_IMAGE (widget);
+  GtkImagePrivate *priv = gtk_image_get_instance_private (image);
+
+  return gtk_icon_helper_get_request_mode (priv->icon_helper);
+}
+
 static void
 gtk_image_class_init (GtkImageClass *class)
 {
@@ -150,6 +159,7 @@ gtk_image_class_init (GtkImageClass *class)
 
   widget_class = GTK_WIDGET_CLASS (class);
   widget_class->snapshot = gtk_image_snapshot;
+  widget_class->get_request_mode = gtk_image_get_request_mode;
   widget_class->measure = gtk_image_measure;
   widget_class->unrealize = gtk_image_unrealize;
   widget_class->style_updated = gtk_image_style_updated;