/*
* Virt Viewer: A virtual machine console viewer
*
* Copyright (C) 2007-2012 Red Hat, Inc.
* Copyright (C) 2009-2012 Daniel P. Berrange
*
* 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: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <libxml/xpath.h>
#include <libxml/uri.h>
#include "virt-viewer-util.h"
GtkBuilder *virt_viewer_util_load_ui(const char *name)
{
struct stat sb;
GtkBuilder *builder;
GError *error = NULL;
builder = gtk_builder_new();
if (stat(name, &sb) >= 0) {
gtk_builder_add_from_file(builder, name, &error);
} else {
const gchar * const * dirs = g_get_system_data_dirs();
g_return_val_if_fail(dirs != NULL, NULL);
while (dirs[0] != NULL) {
gchar *path = g_build_filename(dirs[0], PACKAGE, "ui", name, NULL);
if (gtk_builder_add_from_file(builder, path, NULL) != 0) {
g_free(path);
break;
}
g_free(path);
dirs++;
}
if (dirs[0] == NULL)
goto failed;
}
if (error) {
g_error("Cannot load UI description %s: %s", name,
error->message);
g_clear_error(&error);
goto failed;
}
return builder;
failed:
g_error("failed to find UI description file");
g_object_unref(builder);
return NULL;
}
int
virt_viewer_util_extract_host(const char *uristr,
char **scheme,
char **host,
char **transport,
char **user,
int *port)
{
xmlURIPtr uri;
char *offset = NULL;
if (uristr == NULL ||
!g_ascii_strcasecmp(uristr, "xen"))
uristr = "xen:///";
uri = xmlParseURI(uristr);
g_return_val_if_fail(uri != NULL, 1);
if (host) {
if (!uri || !uri->server) {
*host = g_strdup("localhost");
} else {
if (uri->server[0] == '[') {
gchar *tmp;
*host = g_strdup(uri->server + 1);
if ((tmp = strchr(*host, ']')))
*tmp = '\0';
} else {
*host = g_strdup(uri->server);
}
}
}
if (user) {
if (uri->user)
*user = g_strdup(uri->user);
else
*user = NULL;
}
if (port)
*port = uri->port;
if (uri->scheme)
offset = strchr(uri->scheme, '+');
if (transport) {
if (offset)
*transport = g_strdup(offset + 1);
else
*transport = NULL;
}
if (scheme && uri->scheme) {
if (offset)
*scheme = g_strndup(uri->scheme, offset - uri->scheme);
else
*scheme = g_strdup(uri->scheme);
}
xmlFreeURI(uri);
return 0;
}
typedef struct {
GObject *instance;
GObject *observer;
GClosure *closure;
gulong handler_id;
} WeakHandlerCtx;
static WeakHandlerCtx *
whc_new(GObject *instance,
GObject *observer)
{
WeakHandlerCtx *ctx = g_slice_new0(WeakHandlerCtx);
ctx->instance = instance;
ctx->observer = observer;
return ctx;
}
static void
whc_free(WeakHandlerCtx *ctx)
{
g_slice_free(WeakHandlerCtx, ctx);
}
static void observer_destroyed_cb(gpointer, GObject *);
static void closure_invalidated_cb(gpointer, GClosure *);
/*
* If signal handlers are removed before the object is destroyed, this
* callback will never get triggered.
*/
static void
instance_destroyed_cb(gpointer ctx_,
GObject *where_the_instance_was G_GNUC_UNUSED)
{
WeakHandlerCtx *ctx = ctx_;
/* No need to disconnect the signal here, the instance has gone away. */
g_object_weak_unref(ctx->observer, observer_destroyed_cb, ctx);
g_closure_remove_invalidate_notifier(ctx->closure, ctx,
closure_invalidated_cb);
whc_free(ctx);
}
/* Triggered when the observer is destroyed. */
static void
observer_destroyed_cb(gpointer ctx_,
GObject *where_the_observer_was G_GNUC_UNUSED)
{
WeakHandlerCtx *ctx = ctx_;
g_closure_remove_invalidate_notifier(ctx->closure, ctx,
closure_invalidated_cb);
g_signal_handler_disconnect(ctx->instance, ctx->handler_id);
g_object_weak_unref(ctx->instance, instance_destroyed_cb, ctx);
whc_free(ctx);
}
/* Triggered when either object is destroyed or the handler is disconnected. */
static void
closure_invalidated_cb(gpointer ctx_,
GClosure *where_the_closure_was G_GNUC_UNUSED)
{
WeakHandlerCtx *ctx = ctx_;
g_object_weak_unref(ctx->instance, instance_destroyed_cb, ctx);
g_object_weak_unref(ctx->observer, observer_destroyed_cb, ctx);
whc_free(ctx);
}
/* Copied from tp_g_signal_connect_object. */
/**
* virt_viewer_signal_connect_object: (skip)
* @instance: the instance to connect to.
* @detailed_signal: a string of the form "signal-name::detail".
* @c_handler: the #GCallback to connect.
* @gobject: the object to pass as data to @c_handler.
* @connect_flags: a combination of #GConnectFlags.
*
* Similar to g_signal_connect_object() but will delete connection
* when any of the objects is destroyed.
*
* Returns: the handler id.
*/
gulong virt_viewer_signal_connect_object(gpointer instance,
const gchar *detailed_signal,
GCallback c_handler,
gpointer gobject,
GConnectFlags connect_flags)
{
GObject *instance_obj = G_OBJECT(instance);
WeakHandlerCtx *ctx = whc_new(instance_obj, gobject);
g_return_val_if_fail(G_TYPE_CHECK_INSTANCE (instance), 0);
g_return_val_if_fail(detailed_signal != NULL, 0);
g_return_val_if_fail(c_handler != NULL, 0);
g_return_val_if_fail(G_IS_OBJECT (gobject), 0);
g_return_val_if_fail((connect_flags & ~(G_CONNECT_AFTER|G_CONNECT_SWAPPED)) == 0, 0);
if (connect_flags & G_CONNECT_SWAPPED)
ctx->closure = g_cclosure_new_object_swap(c_handler, gobject);
else
ctx->closure = g_cclosure_new_object(c_handler, gobject);
ctx->handler_id = g_signal_connect_closure(instance, detailed_signal,
ctx->closure, (connect_flags & G_CONNECT_AFTER) ? TRUE : FALSE);
g_object_weak_ref(instance_obj, instance_destroyed_cb, ctx);
g_object_weak_ref(gobject, observer_destroyed_cb, ctx);
g_closure_add_invalidate_notifier(ctx->closure, ctx,
closure_invalidated_cb);
return ctx->handler_id;
}
/*
* Local variables:
* c-indent-level: 4
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/