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Learning_GTK4_tree/gdk/x11/gdkselectionoutputstream-x11.c

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2023-12-12 11:36:42 +01:00
/* GIO - GLib Output, Output and Streaming Library
*
* Copyright (C) 2017 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Benjamin Otte <otte@gnome.org>
* Christian Kellner <gicmo@gnome.org>
*/
#include "config.h"
#include "gdkselectionoutputstream-x11.h"
#include "gdkclipboard-x11.h"
#include "gdkdisplay-x11.h"
#include <glib/gi18n-lib.h>
#include "gdktextlistconverter-x11.h"
#include "gdkx11display.h"
#include "gdkx11property.h"
#include "gdkx11surface.h"
typedef struct _GdkX11PendingSelectionNotify GdkX11PendingSelectionNotify;
typedef struct _GdkX11SelectionOutputStreamPrivate GdkX11SelectionOutputStreamPrivate;
struct _GdkX11SelectionOutputStreamPrivate {
GdkDisplay *display;
GdkX11PendingSelectionNotify *notify;
Window xwindow;
char *selection;
Atom xselection;
char *target;
Atom xtarget;
char *property;
Atom xproperty;
char *type;
Atom xtype;
int format;
gulong timestamp;
GMutex mutex;
GCond cond;
GByteArray *data;
guint flush_requested : 1;
GTask *pending_task;
guint incr : 1;
guint sent_end_of_stream : 1;
guint delete_pending : 1; /* owns a reference */
};
struct _GdkX11PendingSelectionNotify
{
gsize n_pending;
XSelectionEvent xevent;
};
G_DEFINE_TYPE_WITH_PRIVATE (GdkX11SelectionOutputStream, gdk_x11_selection_output_stream, G_TYPE_OUTPUT_STREAM);
static GdkX11PendingSelectionNotify *
gdk_x11_pending_selection_notify_new (Window window,
Atom selection,
Atom target,
Atom property,
Time timestamp)
{
GdkX11PendingSelectionNotify *pending;
pending = g_new0 (GdkX11PendingSelectionNotify, 1);
pending->n_pending = 1;
pending->xevent.type = SelectionNotify;
pending->xevent.serial = 0;
pending->xevent.send_event = True;
pending->xevent.requestor = window;
pending->xevent.selection = selection;
pending->xevent.target = target;
pending->xevent.property = property;
pending->xevent.time = timestamp;
return pending;
}
static void
gdk_x11_pending_selection_notify_free (GdkX11PendingSelectionNotify *notify)
{
g_free (notify);
}
static void
gdk_x11_pending_selection_notify_require (GdkX11PendingSelectionNotify *notify,
guint n_sends)
{
notify->n_pending += n_sends;
}
static void
gdk_x11_pending_selection_notify_send (GdkX11PendingSelectionNotify *notify,
GdkDisplay *display,
gboolean success)
{
Display *xdisplay;
int error;
notify->n_pending--;
if (notify->n_pending)
{
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s:%s: not sending SelectionNotify yet, %zu streams still pending",
gdk_x11_get_xatom_name_for_display (display, notify->xevent.selection),
gdk_x11_get_xatom_name_for_display (display, notify->xevent.target),
notify->n_pending);
return;
}
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s:%s: sending SelectionNotify reporting %s",
gdk_x11_get_xatom_name_for_display (display, notify->xevent.selection),
gdk_x11_get_xatom_name_for_display (display, notify->xevent.target),
success ? "success" : "failure");
if (!success)
notify->xevent.property = None;
xdisplay = gdk_x11_display_get_xdisplay (display);
gdk_x11_display_error_trap_push (display);
if (XSendEvent (xdisplay, notify->xevent.requestor, False, NoEventMask, (XEvent*) &notify->xevent) == 0)
{
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s:%s: failed to XSendEvent()",
gdk_x11_get_xatom_name_for_display (display, notify->xevent.selection),
gdk_x11_get_xatom_name_for_display (display, notify->xevent.target));
}
XSync (xdisplay, False);
error = gdk_x11_display_error_trap_pop (display);
if (error != Success)
{
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s:%s: X error during write: %d",
gdk_x11_get_xatom_name_for_display (display, notify->xevent.selection),
gdk_x11_get_xatom_name_for_display (display, notify->xevent.target),
error);
}
gdk_x11_pending_selection_notify_free (notify);
}
static gboolean
gdk_x11_selection_output_stream_xevent (GdkDisplay *display,
const XEvent *xevent,
gpointer data);
static gboolean
gdk_x11_selection_output_stream_can_flush (GdkX11SelectionOutputStream *stream)
{
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
if (priv->delete_pending)
return FALSE;
return TRUE;
}
static gboolean
gdk_x11_selection_output_stream_needs_flush_unlocked (GdkX11SelectionOutputStream *stream)
{
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
if (priv->sent_end_of_stream)
return FALSE;
if (g_output_stream_is_closing (G_OUTPUT_STREAM (stream)) ||
g_output_stream_is_closed (G_OUTPUT_STREAM (stream)))
return TRUE;
if (priv->data->len == 0 && priv->notify == NULL)
return FALSE;
if (priv->flush_requested)
return TRUE;
return priv->data->len >= gdk_x11_display_get_max_request_size (priv->display);
}
static gboolean
gdk_x11_selection_output_stream_needs_flush (GdkX11SelectionOutputStream *stream)
{
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
gboolean result;
g_mutex_lock (&priv->mutex);
result = gdk_x11_selection_output_stream_needs_flush_unlocked (stream);
g_mutex_unlock (&priv->mutex);
return result;
}
static gsize
get_element_size (int format)
{
switch (format)
{
case 8:
return 1;
case 16:
return sizeof (short);
case 32:
return sizeof (long);
default:
g_warning ("Unknown format %u", format);
return 1;
}
}
static void
gdk_x11_selection_output_stream_perform_flush (GdkX11SelectionOutputStream *stream)
{
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
Display *xdisplay;
gsize element_size, n_elements;
int error;
g_assert (!priv->delete_pending);
xdisplay = gdk_x11_display_get_xdisplay (priv->display);
/* We operate on a foreign window, better guard against catastrophe */
gdk_x11_display_error_trap_push (priv->display);
g_mutex_lock (&priv->mutex);
element_size = get_element_size (priv->format);
n_elements = priv->data->len / element_size;
if (priv->notify && !g_output_stream_is_closing (G_OUTPUT_STREAM (stream)))
{
XWindowAttributes attrs;
priv->incr = TRUE;
GDK_DISPLAY_DEBUG (priv->display, SELECTION,
"%s:%s: initiating INCR transfer",
priv->selection, priv->target);
XGetWindowAttributes (xdisplay,
priv->xwindow,
&attrs);
if (!(attrs.your_event_mask & PropertyChangeMask))
{
XSelectInput (xdisplay, priv->xwindow, attrs.your_event_mask | PropertyChangeMask);
}
XChangeProperty (GDK_DISPLAY_XDISPLAY (priv->display),
priv->xwindow,
priv->xproperty,
gdk_x11_get_xatom_by_name_for_display (priv->display, "INCR"),
32,
PropModeReplace,
(guchar *) &(long) { n_elements },
1);
}
else
{
XChangeProperty (GDK_DISPLAY_XDISPLAY (priv->display),
priv->xwindow,
priv->xproperty,
priv->xtype,
priv->format,
PropModeReplace,
priv->data->data,
n_elements);
GDK_DISPLAY_DEBUG (priv->display, SELECTION,
"%s:%s: wrote %zu/%u bytes",
priv->selection, priv->target, n_elements * element_size, priv->data->len);
g_byte_array_remove_range (priv->data, 0, n_elements * element_size);
if (priv->data->len < element_size)
priv->flush_requested = FALSE;
if (!priv->incr || n_elements == 0)
priv->sent_end_of_stream = TRUE;
}
if (priv->notify)
{
gdk_x11_pending_selection_notify_send (priv->notify, priv->display, TRUE);
priv->notify = NULL;
}
g_object_ref (stream);
priv->delete_pending = TRUE;
g_cond_broadcast (&priv->cond);
g_mutex_unlock (&priv->mutex);
/* XXX: handle failure here and report EPIPE for future operations on the stream? */
error = gdk_x11_display_error_trap_pop (priv->display);
if (error != Success)
{
GDK_DISPLAY_DEBUG (priv->display, SELECTION,
"%s:%s: X error during write: %d",
priv->selection, priv->target, error);
}
if (priv->pending_task)
{
g_task_return_int (priv->pending_task, GPOINTER_TO_SIZE (g_task_get_task_data (priv->pending_task)));
g_object_unref (priv->pending_task);
priv->pending_task = NULL;
}
}
static gboolean
gdk_x11_selection_output_stream_invoke_flush (gpointer data)
{
GdkX11SelectionOutputStream *stream = GDK_X11_SELECTION_OUTPUT_STREAM (data);
if (gdk_x11_selection_output_stream_needs_flush (stream) &&
gdk_x11_selection_output_stream_can_flush (stream))
gdk_x11_selection_output_stream_perform_flush (stream);
return G_SOURCE_REMOVE;
}
static gssize
gdk_x11_selection_output_stream_write (GOutputStream *output_stream,
const void *buffer,
gsize count,
GCancellable *cancellable,
GError **error)
{
GdkX11SelectionOutputStream *stream = GDK_X11_SELECTION_OUTPUT_STREAM (output_stream);
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
g_mutex_lock (&priv->mutex);
g_byte_array_append (priv->data, buffer, count);
GDK_DISPLAY_DEBUG (priv->display, SELECTION,
"%s:%s: wrote %zu bytes, %u total now",
priv->selection, priv->target, count, priv->data->len);
g_mutex_unlock (&priv->mutex);
g_main_context_invoke (NULL, gdk_x11_selection_output_stream_invoke_flush, stream);
g_mutex_lock (&priv->mutex);
if (gdk_x11_selection_output_stream_needs_flush_unlocked (stream))
g_cond_wait (&priv->cond, &priv->mutex);
g_mutex_unlock (&priv->mutex);
return count;
}
static void
gdk_x11_selection_output_stream_write_async (GOutputStream *output_stream,
const void *buffer,
gsize count,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GdkX11SelectionOutputStream *stream = GDK_X11_SELECTION_OUTPUT_STREAM (output_stream);
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
GTask *task;
task = g_task_new (stream, cancellable, callback, user_data);
g_task_set_source_tag (task, gdk_x11_selection_output_stream_write_async);
g_task_set_priority (task, io_priority);
g_mutex_lock (&priv->mutex);
g_byte_array_append (priv->data, buffer, count);
GDK_DISPLAY_DEBUG (priv->display, SELECTION,
"%s:%s: async wrote %zu bytes, %u total now",
priv->selection, priv->target, count, priv->data->len);
g_mutex_unlock (&priv->mutex);
if (!gdk_x11_selection_output_stream_needs_flush (stream))
{
g_task_return_int (task, count);
g_object_unref (task);
return;
}
else if (!gdk_x11_selection_output_stream_can_flush (stream))
{
g_assert (priv->pending_task == NULL);
priv->pending_task = task;
g_task_set_task_data (task, GSIZE_TO_POINTER (count), NULL);
return;
}
else
{
gdk_x11_selection_output_stream_perform_flush (stream);
g_task_return_int (task, count);
g_object_unref (task);
return;
}
}
static gssize
gdk_x11_selection_output_stream_write_finish (GOutputStream *stream,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, stream), -1);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) == gdk_x11_selection_output_stream_write_async, -1);
return g_task_propagate_int (G_TASK (result), error);
}
static gboolean
gdk_x11_selection_output_request_flush (GdkX11SelectionOutputStream *stream)
{
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
gboolean needs_flush;
g_mutex_lock (&priv->mutex);
if (priv->data->len >= get_element_size (priv->format))
priv->flush_requested = TRUE;
needs_flush = gdk_x11_selection_output_stream_needs_flush_unlocked (stream);
g_mutex_unlock (&priv->mutex);
GDK_DISPLAY_DEBUG (priv->display, SELECTION,
"%s:%s: requested flush%s",
priv->selection, priv->target, needs_flush ?"" : ", but not needed");
return needs_flush;
}
static gboolean
gdk_x11_selection_output_stream_flush (GOutputStream *output_stream,
GCancellable *cancellable,
GError **error)
{
GdkX11SelectionOutputStream *stream = GDK_X11_SELECTION_OUTPUT_STREAM (output_stream);
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
if (!gdk_x11_selection_output_request_flush (stream))
return TRUE;
g_main_context_invoke (NULL, gdk_x11_selection_output_stream_invoke_flush, stream);
g_mutex_lock (&priv->mutex);
if (gdk_x11_selection_output_stream_needs_flush_unlocked (stream))
g_cond_wait (&priv->cond, &priv->mutex);
g_mutex_unlock (&priv->mutex);
return TRUE;
}
static void
gdk_x11_selection_output_stream_flush_async (GOutputStream *output_stream,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GdkX11SelectionOutputStream *stream = GDK_X11_SELECTION_OUTPUT_STREAM (output_stream);
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
GTask *task;
task = g_task_new (stream, cancellable, callback, user_data);
g_task_set_source_tag (task, gdk_x11_selection_output_stream_flush_async);
g_task_set_priority (task, io_priority);
if (!gdk_x11_selection_output_stream_can_flush (stream))
{
if (gdk_x11_selection_output_request_flush (stream))
{
g_assert (priv->pending_task == NULL);
priv->pending_task = task;
return;
}
else
{
g_task_return_boolean (task, TRUE);
g_object_unref (task);
return;
}
}
gdk_x11_selection_output_stream_perform_flush (stream);
g_task_return_boolean (task, TRUE);
g_object_unref (task);
return;
}
static gboolean
gdk_x11_selection_output_stream_flush_finish (GOutputStream *stream,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
g_return_val_if_fail (g_async_result_is_tagged (result, gdk_x11_selection_output_stream_flush_async), FALSE);
return g_task_propagate_boolean (G_TASK (result), error);
}
static void
gdk_x11_selection_output_stream_finalize (GObject *object)
{
GdkX11SelectionOutputStream *stream = GDK_X11_SELECTION_OUTPUT_STREAM (object);
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
/* not sending a notify is terrible */
g_assert (priv->notify == NULL);
GDK_DISPLAY_DEBUG (priv->display, SELECTION,
"%s:%s: finalizing",
priv->selection, priv->target);
GDK_X11_DISPLAY (priv->display)->streams = g_slist_remove (GDK_X11_DISPLAY (priv->display)->streams, stream);
g_signal_handlers_disconnect_by_func (priv->display,
gdk_x11_selection_output_stream_xevent,
stream);
g_byte_array_unref (priv->data);
g_cond_clear (&priv->cond);
g_mutex_clear (&priv->mutex);
g_free (priv->selection);
g_free (priv->target);
g_free (priv->property);
g_free (priv->type);
G_OBJECT_CLASS (gdk_x11_selection_output_stream_parent_class)->finalize (object);
}
static void
gdk_x11_selection_output_stream_class_init (GdkX11SelectionOutputStreamClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GOutputStreamClass *output_stream_class = G_OUTPUT_STREAM_CLASS (klass);
object_class->finalize = gdk_x11_selection_output_stream_finalize;
output_stream_class->write_fn = gdk_x11_selection_output_stream_write;
output_stream_class->flush = gdk_x11_selection_output_stream_flush;
output_stream_class->write_async = gdk_x11_selection_output_stream_write_async;
output_stream_class->write_finish = gdk_x11_selection_output_stream_write_finish;
output_stream_class->flush_async = gdk_x11_selection_output_stream_flush_async;
output_stream_class->flush_finish = gdk_x11_selection_output_stream_flush_finish;
}
static void
gdk_x11_selection_output_stream_init (GdkX11SelectionOutputStream *stream)
{
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
g_mutex_init (&priv->mutex);
g_cond_init (&priv->cond);
priv->data = g_byte_array_new ();
}
static gboolean
gdk_x11_selection_output_stream_xevent (GdkDisplay *display,
const XEvent *xevent,
gpointer data)
{
GdkX11SelectionOutputStream *stream = GDK_X11_SELECTION_OUTPUT_STREAM (data);
GdkX11SelectionOutputStreamPrivate *priv = gdk_x11_selection_output_stream_get_instance_private (stream);
Display *xdisplay;
xdisplay = gdk_x11_display_get_xdisplay (priv->display);
if (xevent->xany.display != xdisplay ||
xevent->xany.window != priv->xwindow)
return FALSE;
switch (xevent->type)
{
case PropertyNotify:
if (!priv->incr ||
xevent->xproperty.atom != priv->xproperty ||
xevent->xproperty.state != PropertyDelete)
return FALSE;
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s:%s: got PropertyNotify Delete during INCR",
priv->selection, priv->target);
priv->delete_pending = FALSE;
if (gdk_x11_selection_output_stream_needs_flush (stream) &&
gdk_x11_selection_output_stream_can_flush (stream))
gdk_x11_selection_output_stream_perform_flush (stream);
g_object_unref (stream); /* from unsetting the delete_pending */
return FALSE;
default:
return FALSE;
}
}
static GOutputStream *
gdk_x11_selection_output_stream_new (GdkDisplay *display,
GdkX11PendingSelectionNotify *notify,
Window window,
const char *selection,
const char *target,
const char *property,
const char *type,
int format,
gulong timestamp)
{
GdkX11SelectionOutputStream *stream;
GdkX11SelectionOutputStreamPrivate *priv;
stream = g_object_new (GDK_TYPE_X11_SELECTION_OUTPUT_STREAM, NULL);
priv = gdk_x11_selection_output_stream_get_instance_private (stream);
priv->display = display;
GDK_X11_DISPLAY (display)->streams = g_slist_prepend (GDK_X11_DISPLAY (display)->streams, stream);
priv->notify = notify;
priv->xwindow = window;
priv->selection = g_strdup (selection);
priv->xselection = gdk_x11_get_xatom_by_name_for_display (display, priv->selection);
priv->target = g_strdup (target);
priv->xtarget = gdk_x11_get_xatom_by_name_for_display (display, priv->target);
priv->property = g_strdup (property);
priv->xproperty = gdk_x11_get_xatom_by_name_for_display (display, priv->property);
priv->type = g_strdup (type);
priv->xtype = gdk_x11_get_xatom_by_name_for_display (display, priv->type);
priv->format = format;
priv->timestamp = timestamp;
g_signal_connect (display,
"xevent",
G_CALLBACK (gdk_x11_selection_output_stream_xevent),
stream);
return G_OUTPUT_STREAM (stream);
}
static void
print_atoms (GdkDisplay *display,
const char *selection,
const char *prefix,
const Atom *atoms,
gsize n_atoms)
{
if (GDK_DISPLAY_DEBUG_CHECK (display, CLIPBOARD))
{
GString *str;
str = g_string_new ("");
g_string_append_printf (str, "%s: %s [ ", selection, prefix);
for (gsize i = 0; i < n_atoms; i++)
g_string_append_printf (str, "%s%s", i > 0 ? ", " : "", gdk_x11_get_xatom_name_for_display (display , atoms[i]));
g_string_append (str, " ]");
gdk_debug_message ("%s", str->str);
g_string_free (str, TRUE);
}
}
static void
handle_targets_done (GObject *stream,
GAsyncResult *result,
gpointer user_data)
{
GError *error = NULL;
gsize bytes_written;
if (!g_output_stream_write_all_finish (G_OUTPUT_STREAM (stream), result, &bytes_written, &error))
{
GDK_DEBUG (CLIPBOARD, "---: failed to send targets after %zu bytes: %s",
bytes_written, error->message);
g_error_free (error);
}
g_free (user_data);
}
static void
handle_targets (GOutputStream *stream,
GdkDisplay *display,
GdkContentFormats *formats,
const char *target,
const char *encoding,
int format,
gulong timestamp,
GdkX11SelectionOutputHandler handler,
gpointer user_data)
{
Atom *atoms;
gsize n_atoms;
atoms = gdk_x11_clipboard_formats_to_atoms (display,
TRUE,
formats,
&n_atoms);
print_atoms (display, "---", "sending targets", atoms, n_atoms);
g_output_stream_write_all_async (stream,
atoms,
n_atoms * sizeof (Atom),
G_PRIORITY_DEFAULT,
NULL,
handle_targets_done,
atoms);
g_object_unref (stream);
}
static void
handle_timestamp_done (GObject *stream,
GAsyncResult *result,
gpointer user_data)
{
GError *error = NULL;
gsize bytes_written;
if (!g_output_stream_write_all_finish (G_OUTPUT_STREAM (stream), result, &bytes_written, &error))
{
GDK_DEBUG (CLIPBOARD, "---: failed to send timestamp after %zu bytes: %s",
bytes_written, error->message);
g_error_free (error);
}
g_free (user_data);
}
static void
handle_timestamp (GOutputStream *stream,
GdkDisplay *display,
GdkContentFormats *formats,
const char *target,
const char *encoding,
int format,
gulong timestamp,
GdkX11SelectionOutputHandler handler,
gpointer user_data)
{
gulong *time_;
time_ = g_new (gulong, 1);
*time_ = timestamp;
g_output_stream_write_all_async (stream,
time_,
sizeof (gulong),
G_PRIORITY_DEFAULT,
NULL,
handle_timestamp_done,
time_);
g_object_unref (stream);
}
static void
handle_save_targets (GOutputStream *stream,
GdkDisplay *display,
GdkContentFormats *formats,
const char *target,
const char *encoding,
int format,
gulong timestamp,
GdkX11SelectionOutputHandler handler,
gpointer user_data)
{
/* Don't do anything */
g_object_unref (stream);
}
static void
handle_text_list (GOutputStream *stream,
GdkDisplay *display,
GdkContentFormats *formats,
const char *target,
const char *encoding,
int format,
gulong timestamp,
GdkX11SelectionOutputHandler handler,
gpointer user_data)
{
GOutputStream *converter_stream;
GConverter *converter;
converter = gdk_x11_text_list_converter_to_utf8_new (display,
encoding,
format);
converter_stream = g_converter_output_stream_new (stream, converter);
g_object_unref (converter);
g_object_unref (stream);
handler (converter_stream, gdk_intern_mime_type ("text/plain;charset=utf-8"), user_data);
}
static void
handle_utf8 (GOutputStream *stream,
GdkDisplay *display,
GdkContentFormats *formats,
const char *target,
const char *encoding,
int format,
gulong timestamp,
GdkX11SelectionOutputHandler handler,
gpointer user_data)
{
handler (stream, gdk_intern_mime_type ("text/plain;charset=utf-8"), user_data);
}
typedef void (* MimeTypeHandleFunc) (GOutputStream *, GdkDisplay *, GdkContentFormats *, const char *, const char *, int, gulong, GdkX11SelectionOutputHandler, gpointer);
static const struct {
const char *x_target;
const char *mime_type;
const char *type;
int format;
MimeTypeHandleFunc handler;
} special_targets[] = {
{ "UTF8_STRING", "text/plain;charset=utf-8", "UTF8_STRING", 8, handle_utf8 },
{ "COMPOUND_TEXT", "text/plain;charset=utf-8", "COMPOUND_TEXT", 8, handle_text_list },
{ "TEXT", "text/plain;charset=utf-8", "STRING", 8, handle_text_list },
{ "STRING", "text/plain;charset=utf-8", "STRING", 8, handle_text_list },
{ "TARGETS", NULL, "ATOM", 32, handle_targets },
{ "TIMESTAMP", NULL, "INTEGER", 32, handle_timestamp },
{ "SAVE_TARGETS", NULL, "NULL", 32, handle_save_targets }
};
static gboolean
gdk_x11_selection_output_streams_request (GdkDisplay *display,
GdkX11PendingSelectionNotify *notify,
GdkContentFormats *formats,
Window requestor,
Atom xselection,
Atom xtarget,
Atom xproperty,
gulong timestamp,
GdkX11SelectionOutputHandler handler,
gpointer user_data)
{
const char *mime_type, *selection, *target, *property;
selection = gdk_x11_get_xatom_name_for_display (display, xselection);
target = gdk_x11_get_xatom_name_for_display (display, xtarget);
property = gdk_x11_get_xatom_name_for_display (display, xproperty);
mime_type = gdk_intern_mime_type (target);
if (mime_type)
{
if (gdk_content_formats_contain_mime_type (formats, mime_type))
{
GOutputStream *stream;
stream = gdk_x11_selection_output_stream_new (display,
notify,
requestor,
selection,
target,
property,
target,
8,
timestamp);
handler (stream, mime_type, user_data);
return TRUE;
}
}
else if (g_str_equal (target, "MULTIPLE"))
{
gulong n_atoms;
gulong nbytes;
Atom prop_type;
int prop_format;
Atom *atoms = NULL;
int error;
error = XGetWindowProperty (gdk_x11_display_get_xdisplay (display),
requestor,
xproperty,
0, 0x1FFFFFFF, False,
AnyPropertyType,
&prop_type, &prop_format,
&n_atoms, &nbytes, (guchar **) &atoms);
if (error != Success)
{
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s: XGetProperty() during MULTIPLE failed with %d",
selection, error);
}
else if (prop_format != 32 ||
prop_type != gdk_x11_get_xatom_by_name_for_display (display, "ATOM_PAIR"))
{
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s: XGetProperty() type/format should be ATOM_PAIR/32 but is %s/%d",
selection, gdk_x11_get_xatom_name_for_display (display, prop_type), prop_format);
}
else if (n_atoms < 2)
{
print_atoms (display, selection, "ignoring MULTIPLE request with too little elements", atoms, n_atoms);
}
else
{
gulong i;
print_atoms (display, selection, "MULTIPLE request", atoms, n_atoms);
if (n_atoms % 2)
{
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s: Number of atoms is uneven at %lu, ignoring last element",
selection, n_atoms);
n_atoms &= ~1;
}
gdk_x11_pending_selection_notify_require (notify, n_atoms / 2);
for (i = 0; i < n_atoms / 2; i++)
{
gboolean success;
if (atoms[2 * i] == None || atoms[2 * i + 1] == None)
{
success = FALSE;
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s: None not allowed as atom in MULTIPLE request",
selection);
gdk_x11_pending_selection_notify_send (notify, display, FALSE);
}
else if (atoms[2 * i] == gdk_x11_get_xatom_by_name_for_display (display, "MULTIPLE"))
{
success = FALSE;
GDK_DISPLAY_DEBUG (display, SELECTION,
"%s: MULTIPLE as target in MULTIPLE request would cause recursion",
selection);
gdk_x11_pending_selection_notify_send (notify, display, FALSE);
}
else
{
success = gdk_x11_selection_output_streams_request (display,
notify,
formats,
requestor,
xselection,
atoms[2 * i],
atoms[2 * i + 1],
timestamp,
handler,
user_data);
}
if (!success)
atoms[2 * i + 1] = None;
}
}
XChangeProperty (gdk_x11_display_get_xdisplay (display),
requestor,
xproperty,
prop_type, 32,
PropModeReplace, (guchar *)atoms, n_atoms);
if (atoms)
XFree (atoms);
gdk_x11_pending_selection_notify_send (notify, display, TRUE);
return TRUE;
}
else
{
gsize i;
for (i = 0; i < G_N_ELEMENTS (special_targets); i++)
{
if (g_str_equal (target, special_targets[i].x_target) &&
special_targets[i].handler)
{
GOutputStream *stream;
if (special_targets[i].mime_type)
gdk_intern_mime_type (special_targets[i].mime_type);
stream = gdk_x11_selection_output_stream_new (display,
notify,
requestor,
selection,
target,
property,
special_targets[i].type,
special_targets[i].format,
timestamp);
special_targets[i].handler (stream,
display,
formats,
target,
special_targets[i].type,
special_targets[i].format,
timestamp,
handler,
user_data);
return TRUE;
}
}
}
gdk_x11_pending_selection_notify_send (notify, display, FALSE);
return FALSE;
}
void
gdk_x11_selection_output_streams_create (GdkDisplay *display,
GdkContentFormats *formats,
Window requestor,
Atom selection,
Atom target,
Atom property,
gulong timestamp,
GdkX11SelectionOutputHandler handler,
gpointer user_data)
{
GdkX11PendingSelectionNotify *notify;
notify = gdk_x11_pending_selection_notify_new (requestor,
selection,
target,
property,
timestamp);
gdk_x11_selection_output_streams_request (display,
notify,
formats,
requestor,
selection,
target,
property,
timestamp,
handler,
user_data);
}