fileinfo: Add a G_FILE_ATTRIBUTE_STANDARD_IS_VOLATILE attributewip/rishi/gfile-google

This is meant for opaque, non-POSIX-like backends to indicate that the
URI is not persistent. Applications should look at
G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET for the persistent URI.
Examples of such backends could be a portal for letting sandboxed
applications access the file-system, or a database-backed storage like
Google Drive.

In these cases, the user visible file and folder names are different
from the real identifiers, used by the backend. So, a request to
create google-drive://user@gmail.com/foo/New\ File, would actually
lead to google-drive://user@gmail.com/foo/bar on the server even though
the user visible name is still "New File". Since the server-defined URI
is persistent and sanity-checked by the backend, it is recommended that
applications switch to it as soon as possible. Backends will try to
keep a mapping from "fake" to "real" URIs, but those are only on a
best effort basis. They might not be persistent or have the same
guarantees as the "real" URIs.

https://bugzilla.gnome.org/show_bug.cgi?id=741602

4 files changed, 17 insertions, 0 deletions

diff --git a/docs/reference/gio/gio-sections.txt b/docs/reference/gio/gio-sections.txt
index 40678db97..057a0c9c5 100644
--- a/docs/reference/gio/gio-sections.txt
+++ b/docs/reference/gio/gio-sections.txt
@@ -257,6 +257,7 @@ G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN
 G_FILE_ATTRIBUTE_STANDARD_IS_BACKUP
 G_FILE_ATTRIBUTE_STANDARD_IS_SYMLINK
 G_FILE_ATTRIBUTE_STANDARD_IS_VIRTUAL
+G_FILE_ATTRIBUTE_STANDARD_IS_VOLATILE
 G_FILE_ATTRIBUTE_STANDARD_NAME
 G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME
 G_FILE_ATTRIBUTE_STANDARD_EDIT_NAME
diff --git a/gio/gfileinfo-priv.h b/gio/gfileinfo-priv.h
index 8a55d6b95..1c1e4a170 100644
--- a/gio/gfileinfo-priv.h
+++ b/gio/gfileinfo-priv.h
@@ -43,6 +43,7 @@
 #define G_FILE_ATTRIBUTE_ID_STANDARD_TARGET_URI (1048576 + 17)
 #define G_FILE_ATTRIBUTE_ID_STANDARD_SORT_ORDER (1048576 + 18)
 #define G_FILE_ATTRIBUTE_ID_STANDARD_SYMBOLIC_ICON (1048576 + 19)
+#define G_FILE_ATTRIBUTE_ID_STANDARD_IS_VOLATILE (1048576 + 20)
 #define G_FILE_ATTRIBUTE_ID_ETAG_VALUE (2097152 + 1)
 #define G_FILE_ATTRIBUTE_ID_ID_FILE (3145728 + 1)
 #define G_FILE_ATTRIBUTE_ID_ID_FILESYSTEM (3145728 + 2)
diff --git a/gio/gfileinfo.c b/gio/gfileinfo.c
index 0cbf988a4..379850d49 100644
--- a/gio/gfileinfo.c
+++ b/gio/gfileinfo.c
@@ -203,6 +203,7 @@ ensure_attribute_hash (void)
   REGISTER_ATTRIBUTE (STANDARD_TARGET_URI);
   REGISTER_ATTRIBUTE (STANDARD_SORT_ORDER);
   REGISTER_ATTRIBUTE (STANDARD_SYMBOLIC_ICON);
+  REGISTER_ATTRIBUTE (STANDARD_IS_VOLATILE);
   REGISTER_ATTRIBUTE (ETAG_VALUE);
   REGISTER_ATTRIBUTE (ID_FILE);
   REGISTER_ATTRIBUTE (ID_FILESYSTEM);
diff --git a/gio/gfileinfo.h b/gio/gfileinfo.h
index 1af56ae21..cda63d651 100644
--- a/gio/gfileinfo.h
+++ b/gio/gfileinfo.h
@@ -89,6 +89,20 @@ typedef struct _GFileInfoClass   GFileInfoClass;
 #define G_FILE_ATTRIBUTE_STANDARD_IS_VIRTUAL "standard::is-virtual"         /* boolean */
 
 /**
+ * G_FILE_ATTRIBUTE_STANDARD_IS_VOLATILE:
+ *
+ * A key in the "standard" namespace for checking if a file is
+ * volatile. This is meant for opaque, non-POSIX-like backends to
+ * indicate that the URI is not persistent. Applications should look
+ * at #G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET for the persistent URI.
+ *
+ * Corresponding #GFileAttributeType is %G_FILE_ATTRIBUTE_TYPE_BOOLEAN.
+ *
+ * Since: 2.46
+ **/
+#define G_FILE_ATTRIBUTE_STANDARD_IS_VOLATILE "standard::is-volatile"      /* boolean */
+
+/**
  * G_FILE_ATTRIBUTE_STANDARD_NAME:
  *
  * A key in the "standard" namespace for getting the name of the file.