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1<?xml version="1.0" encoding="UTF-8"?>
2<protocol name="xdg_foreign_unstable_v2">
3
4 <copyright>
5 Copyright © 2015-2016 Red Hat Inc.
6
7 Permission is hereby granted, free of charge, to any person obtaining a
8 copy of this software and associated documentation files (the "Software"),
9 to deal in the Software without restriction, including without limitation
10 the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 and/or sell copies of the Software, and to permit persons to whom the
12 Software is furnished to do so, subject to the following conditions:
13
14 The above copyright notice and this permission notice (including the next
15 paragraph) shall be included in all copies or substantial portions of the
16 Software.
17
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 DEALINGS IN THE SOFTWARE.
25 </copyright>
26
27 <description summary="Protocol for exporting xdg surface handles">
28 This protocol specifies a way for making it possible to reference a surface
29 of a different client. With such a reference, a client can, by using the
30 interfaces provided by this protocol, manipulate the relationship between
31 its own surfaces and the surface of some other client. For example, stack
32 some of its own surface above the other clients surface.
33
34 In order for a client A to get a reference of a surface of client B, client
35 B must first export its surface using xdg_exporter.export_toplevel. Upon
36 doing this, client B will receive a handle (a unique string) that it may
37 share with client A in some way (for example D-Bus). After client A has
38 received the handle from client B, it may use xdg_importer.import_toplevel
39 to create a reference to the surface client B just exported. See the
40 corresponding requests for details.
41
42 A possible use case for this is out-of-process dialogs. For example when a
43 sandboxed client without file system access needs the user to select a file
44 on the file system, given sandbox environment support, it can export its
45 surface, passing the exported surface handle to an unsandboxed process that
46 can show a file browser dialog and stack it above the sandboxed client's
47 surface.
48
49 Warning! The protocol described in this file is experimental and backward
50 incompatible changes may be made. Backward compatible changes may be added
51 together with the corresponding interface version bump. Backward
52 incompatible changes are done by bumping the version number in the protocol
53 and interface names and resetting the interface version. Once the protocol
54 is to be declared stable, the 'z' prefix and the version number in the
55 protocol and interface names are removed and the interface version number is
56 reset.
57 </description>
58
59 <interface name="zxdg_exporter_v2" version="1">
60 <description summary="interface for exporting surfaces">
61 A global interface used for exporting surfaces that can later be imported
62 using xdg_importer.
63 </description>
64
65 <request name="destroy" type="destructor">
66 <description summary="destroy the xdg_exporter object">
67 Notify the compositor that the xdg_exporter object will no longer be
68 used.
69 </description>
70 </request>
71
72 <enum name="error">
73 <description summary="error values">
74 These errors can be emitted in response to invalid xdg_exporter
75 requests.
76 </description>
77 <entry name="invalid_surface" value="0" summary="surface is not an xdg_toplevel"/>
78 </enum>
79
80 <request name="export_toplevel">
81 <description summary="export a toplevel surface">
82 The export_toplevel request exports the passed surface so that it can later be
83 imported via xdg_importer. When called, a new xdg_exported object will
84 be created and xdg_exported.handle will be sent immediately. See the
85 corresponding interface and event for details.
86
87 A surface may be exported multiple times, and each exported handle may
88 be used to create an xdg_imported multiple times. Only xdg_toplevel
89 equivalent surfaces may be exported, otherwise an invalid_surface
90 protocol error is sent.
91 </description>
92 <arg name="id" type="new_id" interface="zxdg_exported_v2"
93 summary="the new xdg_exported object"/>
94 <arg name="surface" type="object" interface="wl_surface"
95 summary="the surface to export"/>
96 </request>
97 </interface>
98
99 <interface name="zxdg_importer_v2" version="1">
100 <description summary="interface for importing surfaces">
101 A global interface used for importing surfaces exported by xdg_exporter.
102 With this interface, a client can create a reference to a surface of
103 another client.
104 </description>
105
106 <request name="destroy" type="destructor">
107 <description summary="destroy the xdg_importer object">
108 Notify the compositor that the xdg_importer object will no longer be
109 used.
110 </description>
111 </request>
112
113 <request name="import_toplevel">
114 <description summary="import a toplevel surface">
115 The import_toplevel request imports a surface from any client given a handle
116 retrieved by exporting said surface using xdg_exporter.export_toplevel.
117 When called, a new xdg_imported object will be created. This new object
118 represents the imported surface, and the importing client can
119 manipulate its relationship using it. See xdg_imported for details.
120 </description>
121 <arg name="id" type="new_id" interface="zxdg_imported_v2"
122 summary="the new xdg_imported object"/>
123 <arg name="handle" type="string"
124 summary="the exported surface handle"/>
125 </request>
126 </interface>
127
128 <interface name="zxdg_exported_v2" version="1">
129 <description summary="an exported surface handle">
130 An xdg_exported object represents an exported reference to a surface. The
131 exported surface may be referenced as long as the xdg_exported object not
132 destroyed. Destroying the xdg_exported invalidates any relationship the
133 importer may have established using xdg_imported.
134 </description>
135
136 <request name="destroy" type="destructor">
137 <description summary="unexport the exported surface">
138 Revoke the previously exported surface. This invalidates any
139 relationship the importer may have set up using the xdg_imported created
140 given the handle sent via xdg_exported.handle.
141 </description>
142 </request>
143
144 <event name="handle">
145 <description summary="the exported surface handle">
146 The handle event contains the unique handle of this exported surface
147 reference. It may be shared with any client, which then can use it to
148 import the surface by calling xdg_importer.import_toplevel. A handle
149 may be used to import the surface multiple times.
150 </description>
151 <arg name="handle" type="string" summary="the exported surface handle"/>
152 </event>
153 </interface>
154
155 <interface name="zxdg_imported_v2" version="1">
156 <description summary="an imported surface handle">
157 An xdg_imported object represents an imported reference to surface exported
158 by some client. A client can use this interface to manipulate
159 relationships between its own surfaces and the imported surface.
160 </description>
161
162 <enum name="error">
163 <description summary="error values">
164 These errors can be emitted in response to invalid xdg_imported
165 requests.
166 </description>
167 <entry name="invalid_surface" value="0" summary="surface is not an xdg_toplevel"/>
168 </enum>
169
170 <request name="destroy" type="destructor">
171 <description summary="destroy the xdg_imported object">
172 Notify the compositor that it will no longer use the xdg_imported
173 object. Any relationship that may have been set up will at this point
174 be invalidated.
175 </description>
176 </request>
177
178 <request name="set_parent_of">
179 <description summary="set as the parent of some surface">
180 Set the imported surface as the parent of some surface of the client.
181 The passed surface must be an xdg_toplevel equivalent, otherwise an
182 invalid_surface protocol error is sent. Calling this function sets up
183 a surface to surface relation with the same stacking and positioning
184 semantics as xdg_toplevel.set_parent.
185 </description>
186 <arg name="surface" type="object" interface="wl_surface"
187 summary="the child surface"/>
188 </request>
189
190 <event name="destroyed">
191 <description summary="the imported surface handle has been destroyed">
192 The imported surface handle has been destroyed and any relationship set
193 up has been invalidated. This may happen for various reasons, for
194 example if the exported surface or the exported surface handle has been
195 destroyed, if the handle used for importing was invalid.
196 </description>
197 </event>
198 </interface>
199
200</protocol>