compositor: Add a clipboard manager
We use the selection signal to get a callback when somebody sets a
selection (including the X server proxy) and then copy the contents
of the first mime type. If the selection is cleared (when the client
dies), we set a new selection with that contents.
diff --git a/src/Makefile.am b/src/Makefile.am
index 64932a1..51f7ad5 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -18,6 +18,7 @@
screenshooter.c \
screenshooter-protocol.c \
screenshooter-server-protocol.h \
+ clipboard.c \
text-cursor-position.c \
text-cursor-position-protocol.c \
text-cursor-position-server-protocol.h \
diff --git a/src/clipboard.c b/src/clipboard.c
new file mode 100644
index 0000000..f5caf41
--- /dev/null
+++ b/src/clipboard.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <linux/input.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/uio.h>
+
+#include "compositor.h"
+
+struct clipboard_source {
+ struct wl_data_source base;
+ struct wl_array contents;
+ struct clipboard *clipboard;
+ struct wl_event_source *event_source;
+ uint32_t serial;
+ int refcount;
+};
+
+struct clipboard {
+ struct weston_seat *seat;
+ struct wl_listener selection_listener;
+ struct wl_listener destroy_listener;
+ struct clipboard_source *source;
+};
+
+static void clipboard_client_create(struct clipboard_source *source, int fd);
+
+static void
+clipboard_source_unref(struct clipboard_source *source)
+{
+ char **s;
+
+ source->refcount--;
+ if (source->refcount > 0)
+ return;
+
+ if (source->event_source)
+ wl_event_source_remove(source->event_source);
+ wl_signal_emit(&source->base.resource.destroy_signal,
+ &source->base.resource);
+ s = source->base.mime_types.data;
+ free(*s);
+ wl_array_release(&source->base.mime_types);
+ wl_array_release(&source->contents);
+ free(source);
+}
+
+static int
+clipboard_source_data(int fd, uint32_t mask, void *data)
+{
+ struct clipboard_source *source = data;
+ struct clipboard *clipboard = source->clipboard;
+ char *p;
+ int len, size;
+
+ if (source->contents.alloc - source->contents.size < 1024) {
+ wl_array_add(&source->contents, 1024);
+ source->contents.size -= 1024;
+ }
+
+ p = source->contents.data + source->contents.size;
+ size = source->contents.alloc - source->contents.size;
+ len = read(fd, p, size);
+ if (len == 0) {
+ wl_event_source_remove(source->event_source);
+ source->event_source = NULL;
+ } else if (len < 0) {
+ clipboard_source_unref(source);
+ clipboard->source = NULL;
+ } else {
+ source->contents.size += len;
+ }
+
+ return 1;
+}
+
+static void
+clipboard_source_accept(struct wl_data_source *source,
+ uint32_t time, const char *mime_type)
+{
+}
+
+static void
+clipboard_source_send(struct wl_data_source *base,
+ const char *mime_type, int32_t fd)
+{
+ struct clipboard_source *source =
+ container_of(base, struct clipboard_source, base);
+ char **s;
+
+ s = source->base.mime_types.data;
+ if (strcmp(mime_type, s[0]) == 0)
+ clipboard_client_create(source, fd);
+ else
+ close(fd);
+}
+
+static void
+clipboard_source_cancel(struct wl_data_source *source)
+{
+}
+
+static struct clipboard_source *
+clipboard_source_create(struct clipboard *clipboard,
+ const char *mime_type, uint32_t serial, int fd)
+{
+ struct wl_display *display = clipboard->seat->compositor->wl_display;
+ struct wl_event_loop *loop = wl_display_get_event_loop(display);
+ struct clipboard_source *source;
+ char **s;
+
+ source = malloc(sizeof *source);
+ wl_array_init(&source->contents);
+ wl_array_init(&source->base.mime_types);
+ source->base.accept = clipboard_source_accept;
+ source->base.send = clipboard_source_send;
+ source->base.cancel = clipboard_source_cancel;
+ source->base.resource.data = &source->base;
+ wl_signal_init(&source->base.resource.destroy_signal);
+ source->refcount = 1;
+ source->clipboard = clipboard;
+ source->serial = serial;
+
+ s = wl_array_add(&source->base.mime_types, sizeof *s);
+ *s = strdup(mime_type);
+
+ source->event_source =
+ wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
+ clipboard_source_data, source);
+
+ return source;
+}
+
+struct clipboard_client {
+ struct wl_event_source *event_source;
+ size_t offset;
+ struct clipboard_source *source;
+};
+
+static int
+clipboard_client_data(int fd, uint32_t mask, void *data)
+{
+ struct clipboard_client *client = data;
+ char *p;
+ size_t size;
+ int len;
+
+ size = client->source->contents.size;
+ p = client->source->contents.data;
+ len = write(fd, p + client->offset, size - client->offset);
+ if (len > 0)
+ client->offset += len;
+
+ if (client->offset == size || len <= 0) {
+ close(fd);
+ wl_event_source_remove(client->event_source);
+ clipboard_source_unref(client->source);
+ free(client);
+ }
+
+ return 1;
+}
+
+static void
+clipboard_client_create(struct clipboard_source *source, int fd)
+{
+ struct weston_seat *seat = source->clipboard->seat;
+ struct clipboard_client *client;
+ struct wl_event_loop *loop =
+ wl_display_get_event_loop(seat->compositor->wl_display);
+
+ client = malloc(sizeof *client);
+
+ client->offset = 0;
+ client->source = source;
+ source->refcount++;
+ client->event_source =
+ wl_event_loop_add_fd(loop, fd, WL_EVENT_WRITABLE,
+ clipboard_client_data, client);
+}
+
+static void
+clipboard_set_selection(struct wl_listener *listener, void *data)
+{
+ struct clipboard *clipboard =
+ container_of(listener, struct clipboard, selection_listener);
+ struct weston_seat *seat = data;
+ struct wl_data_source *source = seat->seat.selection_data_source;
+ const char **mime_types;
+ int p[2];
+
+ if (source == NULL) {
+ if (clipboard->source)
+ wl_seat_set_selection(&seat->seat,
+ &clipboard->source->base,
+ clipboard->source->serial);
+ return;
+ } else if (source->accept == clipboard_source_accept) {
+ /* Callback for our data source. */
+ return;
+ }
+
+ if (clipboard->source)
+ clipboard_source_unref(clipboard->source);
+
+ clipboard->source = NULL;
+
+ mime_types = source->mime_types.data;
+
+ if (pipe2(p, O_CLOEXEC) == -1)
+ return;
+
+ source->send(source, mime_types[0], p[1]);
+
+ clipboard->source =
+ clipboard_source_create(clipboard, mime_types[0],
+ seat->seat.selection_serial, p[0]);
+ if (clipboard->source == NULL)
+ return;
+}
+
+struct clipboard *
+clipboard_create(struct weston_seat *seat)
+{
+ struct clipboard *clipboard;
+
+ clipboard = malloc(sizeof *clipboard);
+ if (clipboard == NULL)
+ return NULL;
+
+ clipboard->seat = seat;
+ clipboard->selection_listener.notify = clipboard_set_selection;
+
+ wl_signal_add(&seat->seat.selection_signal,
+ &clipboard->selection_listener);
+
+ return clipboard;
+}
diff --git a/src/compositor.c b/src/compositor.c
index b299e03..797ab99 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -2454,6 +2454,8 @@
seat->new_drag_icon_listener.notify = device_handle_new_drag_icon;
wl_signal_add(&seat->seat.drag_icon_signal,
&seat->new_drag_icon_listener);
+
+ clipboard_create(seat);
}
WL_EXPORT void
diff --git a/src/compositor.h b/src/compositor.h
index d070471..836f10a 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -677,6 +677,9 @@
void
screenshooter_create(struct weston_compositor *ec);
+struct clipboard *
+clipboard_create(struct weston_seat *seat);
+
void
text_cursor_position_notifier_create(struct weston_compositor *ec);