[mutter/wip/carlosg/clipboard-manager: 6/12] x11: Add X11 selection management
- From: Carlos Garnacho <carlosg src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [mutter/wip/carlosg/clipboard-manager: 6/12] x11: Add X11 selection management
- Date: Wed, 24 Apr 2019 09:03:27 +0000 (UTC)
commit 56d70a25299b00b2c117c906bd5981d7d8144576
Author: Carlos Garnacho <carlosg gnome org>
Date: Mon Nov 19 18:17:25 2018 +0100
x11: Add X11 selection management
This code takes care of both setting up X11 selection sources whenever
X11 clients claim selection ownership, and claiming selection ownership
on a mutter X11 window whenever other selection sources claim ownership.
https://gitlab.gnome.org/GNOME/mutter/merge_requests/320
src/meson.build | 2 +
src/x11/events.c | 3 +
src/x11/meta-x11-display-private.h | 4 +
src/x11/meta-x11-display.c | 4 +
src/x11/meta-x11-selection-private.h | 34 +++
src/x11/meta-x11-selection.c | 411 +++++++++++++++++++++++++++++++++++
6 files changed, 458 insertions(+)
---
diff --git a/src/meson.build b/src/meson.build
index b5e8835ab..be4c5f27d 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -385,6 +385,8 @@ mutter_sources = [
'x11/meta-x11-display.c',
'x11/meta-x11-display-private.h',
'x11/meta-x11-errors.c',
+ 'x11/meta-x11-selection.c',
+ 'x11/meta-x11-selection-private.h',
'x11/meta-x11-selection-input-stream.c',
'x11/meta-x11-selection-input-stream-private.h',
'x11/meta-x11-selection-output-stream.c',
diff --git a/src/x11/events.c b/src/x11/events.c
index 1eec8db0b..e925e482e 100644
--- a/src/x11/events.c
+++ b/src/x11/events.c
@@ -40,6 +40,7 @@
#include "meta/meta-x11-errors.h"
#include "x11/meta-startup-notification-x11.h"
#include "x11/meta-x11-display-private.h"
+#include "x11/meta-x11-selection-private.h"
#include "x11/meta-x11-selection-input-stream-private.h"
#include "x11/meta-x11-selection-output-stream-private.h"
#include "x11/window-x11.h"
@@ -1726,6 +1727,8 @@ process_selection_event (MetaX11Display *x11_display,
gboolean handled = FALSE;
GList *l;
+ handled |= meta_x11_selection_handle_event (x11_display, event);
+
for (l = x11_display->selection.input_streams; l && !handled; l = l->next)
handled |= meta_x11_selection_input_stream_xevent (l->data, event);
diff --git a/src/x11/meta-x11-display-private.h b/src/x11/meta-x11-display-private.h
index aec703563..3e92dba29 100644
--- a/src/x11/meta-x11-display-private.h
+++ b/src/x11/meta-x11-display-private.h
@@ -30,6 +30,7 @@
#include "backends/meta-monitor-manager-private.h"
#include "core/display-private.h"
+#include "core/meta-selection-source.h"
#include "meta/common.h"
#include "meta/types.h"
#include "meta/meta-x11-display.h"
@@ -125,6 +126,9 @@ struct _MetaX11Display
struct {
Window window;
+ MetaSelectionSource *owners[META_N_SELECTION_TYPES];
+ GCancellable *cancellables[META_N_SELECTION_TYPES];
+
GList *input_streams;
GList *output_streams;
} selection;
diff --git a/src/x11/meta-x11-display.c b/src/x11/meta-x11-display.c
index 8ce12b994..af8ae7a8d 100644
--- a/src/x11/meta-x11-display.c
+++ b/src/x11/meta-x11-display.c
@@ -61,6 +61,7 @@
#include "x11/events.h"
#include "x11/group-props.h"
+#include "x11/meta-x11-selection-private.h"
#include "x11/window-props.h"
#include "x11/xprops.h"
@@ -105,6 +106,8 @@ meta_x11_display_dispose (GObject *object)
meta_x11_display_ungrab_keys (x11_display);
+ meta_x11_selection_shutdown (x11_display);
+
if (x11_display->ui)
{
meta_ui_free (x11_display->ui);
@@ -1327,6 +1330,7 @@ meta_x11_display_new (MetaDisplay *display, GError **error)
set_x11_bell_is_audible (x11_display, meta_prefs_bell_is_audible ());
meta_x11_startup_notification_init (x11_display);
+ meta_x11_selection_init (x11_display);
return x11_display;
}
diff --git a/src/x11/meta-x11-selection-private.h b/src/x11/meta-x11-selection-private.h
new file mode 100644
index 000000000..9e42751bb
--- /dev/null
+++ b/src/x11/meta-x11-selection-private.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2018 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Carlos Garnacho <carlosg gnome org>
+ */
+
+#ifndef META_X11_SELECTION_H
+#define META_X11_SELECTION_H
+
+#include "core/meta-selection.h"
+#include "x11/meta-x11-display-private.h"
+
+gboolean meta_x11_selection_handle_event (MetaX11Display *display,
+ XEvent *event);
+
+void meta_x11_selection_init (MetaX11Display *x11_display);
+void meta_x11_selection_shutdown (MetaX11Display *x11_display);
+
+#endif /* META_X11_SELECTION_H */
diff --git a/src/x11/meta-x11-selection.c b/src/x11/meta-x11-selection.c
new file mode 100644
index 000000000..4d2f89c93
--- /dev/null
+++ b/src/x11/meta-x11-selection.c
@@ -0,0 +1,411 @@
+/*
+ * Copyright (C) 2018 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Carlos Garnacho <carlosg gnome org>
+ */
+
+#include "config.h"
+
+#include <gdk/gdkx.h>
+
+#include "x11/meta-selection-source-x11-private.h"
+#include "x11/meta-x11-selection-output-stream-private.h"
+#include "x11/meta-x11-selection-private.h"
+
+static gboolean
+atom_to_selection_type (Display *xdisplay,
+ Atom selection,
+ MetaSelectionType *selection_type)
+{
+ if (selection == XInternAtom (xdisplay, "PRIMARY", False))
+ *selection_type = META_SELECTION_PRIMARY;
+ else if (selection == XInternAtom (xdisplay, "CLIPBOARD", False))
+ *selection_type = META_SELECTION_CLIPBOARD;
+ else if (selection == XInternAtom (xdisplay, "XdndSelection", False))
+ *selection_type = META_SELECTION_DND;
+ else
+ return FALSE;
+
+ return TRUE;
+}
+
+static Atom
+selection_to_atom (MetaSelectionType type,
+ Display *xdisplay)
+{
+ Atom atom;
+
+ switch (type)
+ {
+ case META_SELECTION_PRIMARY:
+ atom = XInternAtom (xdisplay, "PRIMARY", False);
+ break;
+ case META_SELECTION_CLIPBOARD:
+ atom = XInternAtom (xdisplay, "CLIPBOARD", False);
+ break;
+ case META_SELECTION_DND:
+ atom = XInternAtom (xdisplay, "XdndSelection", False);
+ break;
+ default:
+ g_warn_if_reached ();
+ atom = None;
+ break;
+ }
+
+ return atom;
+}
+
+static GBytes *
+mimetypes_to_bytes (GList *mimetypes,
+ Display *xdisplay)
+{
+ gint i = 0, len = g_list_length (mimetypes) + 2;
+ Atom *atoms = g_new0 (Atom, len);
+ GList *l;
+
+ for (l = mimetypes; l; l = l->next)
+ atoms[i++] = XInternAtom (xdisplay, l->data, False);
+
+ atoms[i++] = XInternAtom (xdisplay, "TARGETS", False);
+ atoms[i++] = XInternAtom (xdisplay, "TIMESTAMP", False);
+ g_assert (i == len);
+
+ return g_bytes_new_take (atoms, len * sizeof (Atom));
+}
+
+static void
+send_selection_notify (XSelectionRequestEvent *request_event,
+ gboolean accepted)
+{
+ Display *xdisplay = GDK_DISPLAY_XDISPLAY (gdk_display_get_default ());
+ XSelectionEvent event;
+
+ memset(&event, 0, sizeof (XSelectionEvent));
+ event.type = SelectionNotify;
+ event.time = request_event->time;
+ event.requestor = request_event->requestor;
+ event.selection = request_event->selection;
+ event.target = request_event->target;
+ event.property = accepted ? request_event->property : None;
+
+ XSendEvent (xdisplay, request_event->requestor,
+ False, NoEventMask, (XEvent *) &event);
+}
+
+static void
+write_mimetypes_cb (GOutputStream *stream,
+ GAsyncResult *res,
+ gpointer user_data)
+{
+ GError *error = NULL;
+
+ g_output_stream_write_bytes_finish (stream, res, &error);
+ g_output_stream_close (stream, NULL, NULL);
+
+ if (error)
+ {
+ g_warning ("Could not fetch selection mimetypes: %s\n", error->message);
+ g_error_free (error);
+ }
+}
+
+static void
+transfer_cb (MetaSelection *selection,
+ GAsyncResult *res,
+ GOutputStream *output)
+{
+ GError *error = NULL;
+
+ if (!meta_selection_transfer_finish (selection, res, &error))
+ {
+ g_warning ("Error writing data to X11 selection: %s", error->message);
+ g_error_free (error);
+ }
+
+ g_output_stream_close (output, NULL, NULL);
+ g_object_unref (output);
+}
+
+static gboolean
+meta_x11_selection_handle_selection_request (MetaX11Display *x11_display,
+ XEvent *xevent)
+{
+ XSelectionRequestEvent *event = (XSelectionRequestEvent *) xevent;
+ MetaSelectionType selection_type;
+ MetaSelection *selection;
+ GOutputStream *output;
+ GList *mimetypes;
+
+ if (!atom_to_selection_type (x11_display->xdisplay, event->selection, &selection_type))
+ return FALSE;
+ if (x11_display->selection.window != event->owner)
+ return FALSE;
+
+ selection = meta_display_get_selection (meta_get_display ());
+
+ if (event->target == gdk_x11_get_xatom_by_name ("TARGETS"))
+ {
+ GBytes *bytes;
+
+ mimetypes = meta_selection_get_mimetypes (selection, selection_type);
+
+ if (!mimetypes)
+ {
+ send_selection_notify (event, FALSE);
+ return FALSE;
+ }
+
+ output = meta_x11_selection_output_stream_new (x11_display, event->requestor,
+ gdk_x11_get_xatom_name (event->selection),
+ gdk_x11_get_xatom_name (event->target),
+ gdk_x11_get_xatom_name (event->property),
+ "ATOM", 32, event->time);
+
+ bytes = mimetypes_to_bytes (mimetypes, x11_display->xdisplay);
+ g_list_free_full (mimetypes, g_free);
+
+ g_output_stream_write_bytes_async (output,
+ bytes,
+ G_PRIORITY_DEFAULT,
+ NULL,
+ (GAsyncReadyCallback) write_mimetypes_cb,
+ output);
+ g_bytes_unref (bytes);
+ return TRUE;
+ }
+ else if (event->target == gdk_x11_get_xatom_by_name ("DELETE"))
+ {
+ /* DnD only, this is just handled through other means on our non-x11
+ * sources, so just go with it.
+ */
+ send_selection_notify (event, TRUE);
+ }
+ else
+ {
+ gboolean has_target;
+
+ mimetypes = meta_selection_get_mimetypes (selection, selection_type);
+ has_target = g_list_find_custom (mimetypes,
+ gdk_x11_get_xatom_name (event->target),
+ (GCompareFunc) g_strcmp0) != NULL;
+ g_list_free_full (mimetypes, g_free);
+
+ if (has_target)
+ {
+ output = meta_x11_selection_output_stream_new (x11_display,
+ event->requestor,
+ gdk_x11_get_xatom_name (event->selection),
+ gdk_x11_get_xatom_name (event->target),
+ gdk_x11_get_xatom_name (event->property),
+ gdk_x11_get_xatom_name (event->target),
+ 8, event->time);
+
+ meta_selection_transfer_async (selection,
+ selection_type,
+ gdk_x11_get_xatom_name (event->target),
+ -1,
+ output,
+ NULL,
+ (GAsyncReadyCallback) transfer_cb,
+ output);
+ return TRUE;
+ }
+ else
+ send_selection_notify (event, FALSE);
+ }
+
+ return FALSE;
+}
+
+typedef struct
+{
+ MetaX11Display *x11_display;
+ MetaSelection *selection;
+ MetaSelectionType selection_type;
+} SourceNewData;
+
+static void
+source_new_cb (GObject *object,
+ GAsyncResult *res,
+ gpointer user_data)
+{
+ MetaSelectionSource *source;
+ SourceNewData *data = user_data;
+ MetaSelection *selection = data->selection;
+ MetaSelectionType selection_type = data->selection_type;
+ MetaX11Display *x11_display = data->x11_display;
+ GError *error = NULL;
+
+ source = meta_selection_source_x11_new_finish (res, &error);
+ if (source)
+ {
+ meta_selection_set_owner (selection, selection_type, source);
+ g_set_object (&x11_display->selection.owners[selection_type], source);
+ }
+ else
+ {
+ g_warning ("Could not create selection source for X11: %s",
+ error->message);
+ }
+
+ g_free (data);
+}
+
+static gboolean
+meta_x11_selection_handle_xfixes_selection_notify (MetaX11Display *x11_display,
+ XEvent *xevent)
+{
+ XFixesSelectionNotifyEvent *event = (XFixesSelectionNotifyEvent *) xevent;
+ Display *xdisplay = x11_display->xdisplay;
+ MetaSelectionType selection_type;
+ MetaSelection *selection;
+
+ if (!atom_to_selection_type (xdisplay, event->selection, &selection_type))
+ return FALSE;
+
+ selection = meta_display_get_selection (meta_get_display ());
+
+ if (x11_display->selection.cancellables[selection_type])
+ {
+ g_cancellable_cancel (x11_display->selection.cancellables[selection_type]);
+ g_clear_object (&x11_display->selection.cancellables[selection_type]);
+ }
+
+ x11_display->selection.cancellables[selection_type] = g_cancellable_new ();
+
+ if (event->owner == None)
+ {
+ if (x11_display->selection.owners[selection_type])
+ {
+ /* An X client went away, clear the selection */
+ meta_selection_unset_owner (selection, selection_type,
+ x11_display->selection.owners[selection_type]);
+ }
+ }
+ else if (event->owner != x11_display->selection.window)
+ {
+ SourceNewData *data;
+
+ data = g_new (SourceNewData, 1);
+ data->x11_display = x11_display;
+ data->selection = selection;
+ data->selection_type = selection_type;
+
+ meta_selection_source_x11_new_async (x11_display,
+ event->owner,
+ event->timestamp,
+ event->selection,
+ x11_display->selection.cancellables[selection_type],
+ source_new_cb,
+ data);
+ }
+
+ return TRUE;
+}
+
+gboolean
+meta_x11_selection_handle_event (MetaX11Display *x11_display,
+ XEvent *xevent)
+{
+ if (xevent->type == SelectionRequest)
+ return meta_x11_selection_handle_selection_request (x11_display, xevent);
+ else if (xevent->type - x11_display->xfixes_event_base == XFixesSelectionNotify)
+ return meta_x11_selection_handle_xfixes_selection_notify (x11_display, xevent);
+
+ return FALSE;
+}
+
+static void
+owner_changed_cb (MetaSelection *selection,
+ MetaSelectionType selection_type,
+ MetaSelectionSource *owner,
+ MetaX11Display *x11_display)
+{
+ Display *xdisplay = x11_display->xdisplay;
+
+ if (owner && !META_IS_SELECTION_SOURCE_X11 (owner))
+ {
+ if (x11_display->selection.cancellables[selection_type])
+ {
+ g_cancellable_cancel (x11_display->selection.cancellables[selection_type]);
+ g_clear_object (&x11_display->selection.cancellables[selection_type]);
+ }
+
+ /* If the owner is non-X11, claim the selection on our selection
+ * window, so X11 apps can interface with it.
+ */
+ XSetSelectionOwner (xdisplay,
+ selection_to_atom (selection_type, xdisplay),
+ x11_display->selection.window,
+ META_CURRENT_TIME);
+ }
+}
+
+void
+meta_x11_selection_init (MetaX11Display *x11_display)
+{
+ XSetWindowAttributes attributes = { 0 };
+ MetaDisplay *display = meta_get_display ();
+ guint mask, i;
+
+ attributes.event_mask = PropertyChangeMask | SubstructureNotifyMask;
+ attributes.override_redirect = True;
+
+ x11_display->selection.window =
+ XCreateWindow (x11_display->xdisplay,
+ x11_display->xroot,
+ -1, -1, 1, 1,
+ 0, /* border width */
+ 0, /* depth */
+ InputOnly, /* class */
+ CopyFromParent, /* visual */
+ CWEventMask | CWOverrideRedirect,
+ &attributes);
+
+ mask = XFixesSetSelectionOwnerNotifyMask |
+ XFixesSelectionWindowDestroyNotifyMask |
+ XFixesSelectionClientCloseNotifyMask;
+
+ for (i = 0; i < META_N_SELECTION_TYPES; i++)
+ {
+ XFixesSelectSelectionInput (x11_display->xdisplay,
+ x11_display->selection.window,
+ selection_to_atom (i, x11_display->xdisplay),
+ mask);
+ }
+
+ g_signal_connect (meta_display_get_selection (display),
+ "owner-changed",
+ G_CALLBACK (owner_changed_cb),
+ x11_display);
+}
+
+void
+meta_x11_selection_shutdown (MetaX11Display *x11_display)
+{
+ MetaDisplay *display = meta_get_display ();
+
+ g_signal_handlers_disconnect_by_func (meta_display_get_selection (display),
+ owner_changed_cb,
+ x11_display);
+ if (x11_display->selection.window != None)
+ {
+ XDestroyWindow (x11_display->xdisplay, x11_display->selection.window);
+ x11_display->selection.window = None;
+ }
+}
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