[gtk+] filesystem: Add GIcon getters

[Matthias Clasen <matthiasc src gnome org>]

commit 4148795c8bb4ea391ef690957fd2396b7635acb3
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Nov 8 20:53:49 2017 -0500

    filesystem: Add GIcon getters
    
    We want to move away from surfaces, and instead pass
    GIcons and GdkTextures around.

 gtk/gtkfilesystem.c |   52 +++++++++++++++++++++++++++++++++++++++++++++-----
 gtk/gtkfilesystem.h |    4 +++
 2 files changed, 50 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtkfilesystem.c b/gtk/gtkfilesystem.c
index f6edb4e..8a2fc3b 100644
--- a/gtk/gtkfilesystem.c
+++ b/gtk/gtkfilesystem.c
@@ -745,14 +745,10 @@ get_surface_from_gicon (GIcon      *icon,
   return surface;
 }
 
-cairo_surface_t *
-_gtk_file_system_volume_render_icon (GtkFileSystemVolume  *volume,
-                                    GtkWidget            *widget,
-                                    gint                  icon_size,
-                                    GError              **error)
+GIcon *
+_gtk_file_system_volume_get_icon (GtkFileSystemVolume *volume)
 {
   GIcon *icon = NULL;
-  cairo_surface_t *surface;
 
   if (IS_ROOT_VOLUME (volume))
     icon = g_themed_icon_new ("drive-harddisk");
@@ -763,6 +759,20 @@ _gtk_file_system_volume_render_icon (GtkFileSystemVolume  *volume,
   else if (G_IS_MOUNT (volume))
     icon = g_mount_get_icon (G_MOUNT (volume));
 
+  return icon;
+}
+
+cairo_surface_t *
+_gtk_file_system_volume_render_icon (GtkFileSystemVolume  *volume,
+                                    GtkWidget            *widget,
+                                    gint                  icon_size,
+                                    GError              **error)
+{
+  GIcon *icon = NULL;
+  cairo_surface_t *surface;
+
+  icon = _gtk_file_system_volume_get_icon (volume);
+
   if (!icon)
     return NULL;
 
@@ -870,6 +880,36 @@ _gtk_file_info_render_icon_internal (GFileInfo *info,
   return surface;
 }
 
+GIcon *
+_gtk_file_info_get_icon (GFileInfo *info,
+                        int        icon_size,
+                         int        scale)
+{
+  GIcon *icon;
+  GdkPixbuf *pixbuf;
+  const gchar *thumbnail_path;
+
+  thumbnail_path = g_file_info_get_attribute_byte_string (info, G_FILE_ATTRIBUTE_THUMBNAIL_PATH);
+
+  if (thumbnail_path)
+    {
+      pixbuf = gdk_pixbuf_new_from_file_at_size (thumbnail_path,
+                                                icon_size*scale, icon_size*scale,
+                                                NULL);
+
+      if (pixbuf != NULL)
+        return G_ICON (pixbuf);
+    }
+
+  icon = g_file_info_get_icon (info);
+  if (icon)
+    return g_object_ref (icon);
+
+  /* Use general fallback for all files without icon */
+  icon = g_themed_icon_new ("text-x-generic");
+  return icon;
+}
+
 cairo_surface_t *
 _gtk_file_info_render_icon (GFileInfo *info,
                            GtkWidget *widget,
diff --git a/gtk/gtkfilesystem.h b/gtk/gtkfilesystem.h
index a2b144c..0a3db1a 100644
--- a/gtk/gtkfilesystem.h
+++ b/gtk/gtkfilesystem.h
@@ -94,6 +94,7 @@ gchar *               _gtk_file_system_volume_get_display_name (GtkFileSystemVol
 gboolean              _gtk_file_system_volume_is_mounted       (GtkFileSystemVolume *volume);
 GFile *               _gtk_file_system_volume_get_root         (GtkFileSystemVolume *volume);
 GIcon *               _gtk_file_system_volume_get_symbolic_icon (GtkFileSystemVolume *volume);
+GIcon *               _gtk_file_system_volume_get_icon          (GtkFileSystemVolume *volume);
 cairo_surface_t *     _gtk_file_system_volume_render_icon      (GtkFileSystemVolume  *volume,
                                                                GtkWidget            *widget,
                                                                gint                  icon_size,
@@ -106,6 +107,9 @@ void                  _gtk_file_system_volume_unref            (GtkFileSystemVol
 cairo_surface_t *     _gtk_file_info_render_icon (GFileInfo *info,
                                                  GtkWidget *widget,
                                                  gint       icon_size);
+GIcon *               _gtk_file_info_get_icon    (GFileInfo *info,
+                                                  int        icon_size,
+                                                  int        scale);
 
 gboolean       _gtk_file_info_consider_as_directory (GFileInfo *info);