A wl_data_device provides access to inter-client data transfer
mechanisms such as copy-and-paste and drag-and-drop.
</description>
+
+ <enum name="error">
+ <entry name="role" value="0" summary="given wl_surface has another role"/>
+ </enum>
+
<request name="start_drag">
<description summary="start drag-and-drop operation">
This request asks the compositor to start a drag-and-drop
hotspot, but subsequent wl_surface.attach request can move the
relative position. Attach requests must be confirmed with
wl_surface.commit as usual. The icon surface is given the role of
- a drag-and-drop icon.
+ a drag-and-drop icon. If the icon surface already has another role,
+ it raises a protocol error.
The current and pending input regions of the icon wl_surface are
cleared, and wl_surface.set_input_region is ignored until the
a basic surface.
</description>
+ <enum name="error">
+ <entry name="role" value="0" summary="given wl_surface has another role"/>
+ </enum>
+
<request name="get_shell_surface">
<description summary="create a shell surface from a surface">
Create a shell surface for an existing surface. This gives
- the wl_surface the role of a shell surface.
+ the wl_surface the role of a shell surface. If the wl_surface
+ already has another role, it raises a protocol error.
Only one shell surface can be associated with a given surface.
</description>
and scrolling.
</description>
+ <enum name="error">
+ <entry name="role" value="0" summary="given wl_surface has another role"/>
+ </enum>
+
<request name="set_cursor">
<description summary="set the pointer surface">
Set the pointer surface, i.e., the surface that contains the
pointer image (cursor). This request gives the surface the role
- of a cursor.
+ of a cursor. If the surface already has another role, it raises
+ a protocol error.
The cursor actually changes only if the pointer
focus for this device is one of the requesting client's surfaces