add "native" wayland clipboard backend and several related properties

DOCS/interface-changes/clipboard.txt

@@ -1,2 +1,3 @@
 add `--clipboard-enable` and `--clipboard-monitor` options
 add `clipboard` property
+add `current-clipboard-backend` property

DOCS/man/input.rst

@@ -3968,10 +3968,36 @@ Property list
         The text content in the clipboard (Windows, Wayland and macOS only).
         Writing to this property sets the text clipboard content (Windows only).
 
+    ``clipboard/text-primary``
+        The text content in the primary selection (Wayland only).
+
     .. note::
 
-        On Wayland, the clipboard content is only updated when the compositor
-        sends a selection data offer (typically when VO window is focused).
+        On Wayland with the ``vo`` clipboard backend, the clipboard content is
+        only updated when the compositor sends a selection data offer
+        (typically when VO window is focused). The ``wayland`` backend typically
+        does not have this limitation.
+        See ``current-clipboard-backend`` property for more details.
+
+``current-clipboard-backend``
+    A string containing the currently active clipboard backend.
+    The following clipboard backends are implemented:
+
+    ``win32``
+        Windows backend.
+
+    ``mac``
+        macOS backend.
+
+    ``wayland``
+        Wayland backend. This backend is only available if the compositor
+        supports the ``zwlr_data_control_manager_v1`` protocol.
+
+    ``vo``
+        VO backend. Requires an active VO window, and support differs across
+        platforms. Currently, this is used as a fallback for Wayland
+        compositors without support for the ``zwlr_data_control_manager_v1``
+        protocol.
 
 Inconsistencies between options and properties
 ----------------------------------------------

DOCS/man/options.rst

@@ -7860,10 +7860,14 @@ Miscellaneous
     writing to the ``clipboard`` property to get and set clipboard contents.
 
 ``--clipboard-monitor=<yes|no>``
-    (Windows and macOS only)
+    (Windows, Wayland and macOS only)
 
     Enable clipboard monitoring so that the ``clipboard`` property can be
     observed for content changes (default: no). This only affects clipboard
     implementations which use polling to monitor clipboard updates.
     Other platforms currently ignore this option and always/never notify
     changes.
+
+    On Wayland, this option only has effect on the ``wayland`` backend, and
+    not for the ``vo`` backend. See ``current-clipboard-backend`` property for
+    more details.

meson.build

@@ -1048,6 +1048,15 @@ if features['wayland']
     subdir(join_paths('video', 'out'))
 endif
 
+foreach v: ['1.39']
+    features += {'wayland-protocols-' + v.replace('.', '-'):
+        wayland['deps'][2].version().version_compare('>=' + v)}
+endforeach
+
+if features['wayland-protocols-1-39']
+    sources += files('player/clipboard/clipboard-wayland.c')
+endif
+
 features += {'memfd-create': false}
 if features['wayland']
     features += {'memfd-create': cc.has_function('memfd_create',

player/clipboard/clipboard-vo.c

@@ -22,12 +22,14 @@
 
 struct clipboard_vo_priv {
     struct MPContext *mpctx;
+    struct mp_log *log;
 };
 
 static int init(struct clipboard_ctx *cl, struct clipboard_init_params *params)
 {
     struct clipboard_vo_priv *priv = talloc_ptrtype(cl, priv);
     priv->mpctx = params->mpctx;
+    priv->log = mp_log_new(priv, cl->log, "vo"),
     cl->priv = priv;
     return CLIPBOARD_SUCCESS;
 }
@@ -52,10 +54,10 @@ static int get_data(struct clipboard_ctx *cl, struct clipboard_access_params *pa
         return CLIPBOARD_SUCCESS;
     case VO_NOTAVAIL:
     case VO_NOTIMPL:
-        MP_VERBOSE(cl, "VO does not support getting clipboard in the requested format.\n");
+        MP_VERBOSE(priv, "VO does not support getting clipboard in the requested format.\n");
         return CLIPBOARD_UNAVAILABLE;
     default:
-        MP_WARN(cl, "Failed getting VO clipboard.\n");
+        MP_WARN(priv, "Failed getting VO clipboard.\n");
         return CLIPBOARD_FAILED;
     }
 }
@@ -78,10 +80,10 @@ static int set_data(struct clipboard_ctx *cl, struct clipboard_access_params *pa
         return CLIPBOARD_SUCCESS;
     case VO_NOTAVAIL:
     case VO_NOTIMPL:
-        MP_VERBOSE(cl, "VO does not support setting clipboard in the requested format.\n");
+        MP_VERBOSE(priv, "VO does not support setting clipboard in the requested format.\n");
         return CLIPBOARD_UNAVAILABLE;
     default:
-        MP_WARN(cl, "Failed setting VO clipboard.\n");
+        MP_WARN(priv, "Failed setting VO clipboard.\n");
         return CLIPBOARD_FAILED;
     }
 }