--- /dev/null
+/*****************************************************************************
+ * vlc_dialog.h: user interaction dialogs
+ *****************************************************************************
+ * Copyright (C) 2009 Rémi Denis-Courmont
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifndef VLC_DIALOG_H_
+#define VLC_DIALOG_H_
+
+/**
+ * \file vlc_dialog.h
+ * User interaction dialog APIs
+ */
+
+/**
+ * A fatal error dialog.
+ * No response expected from the user.
+ */
+typedef struct dialog_fatal_t
+{
+ const char *title;
+ const char *message;
+} dialog_fatal_t;
+
+VLC_EXPORT( void, dialog_Fatal, (vlc_object_t *, const char *, const char *, ...) ) LIBVLC_FORMAT(3, 4);
+#define dialog_Fatal(o, t, ...) \
+ dialog_Fatal(VLC_OBJECT(o), t, __VA_ARGS__)
+
+VLC_EXPORT( int, dialog_Register, (vlc_object_t *) );
+VLC_EXPORT( int, dialog_Unregister, (vlc_object_t *) );
+#define dialog_Register(o) dialog_Register(VLC_OBJECT(o))
+#define dialog_Unregister(o) dialog_Unregister(VLC_OBJECT(o))
+
+#endif
--- /dev/null
+/*****************************************************************************
+ * dialog.c: User dialog functions
+ *****************************************************************************
+ * Copyright © 2009 Rémi Denis-Courmont
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/**
+ * \file dialog.c
+ * User dialogs core
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdarg.h>
+
+#include <vlc_common.h>
+#include <vlc_dialog.h>
+#include <assert.h>
+#include "libvlc.h"
+
+static vlc_mutex_t provider_lock = VLC_STATIC_MUTEX;
+
+#undef dialog_Register
+/**
+ * Registers an object as the dialog provider.
+ * It is assumed that the appropriate variable callbacks are already
+ * registered.
+ */
+int dialog_Register (vlc_object_t *obj)
+{
+ libvlc_priv_t *priv = libvlc_priv (obj->p_libvlc);
+ int ret = VLC_EGENERIC;
+
+ vlc_mutex_lock (&provider_lock);
+ if (priv->p_dialog_provider == NULL)
+ { /* Since the object is responsible for unregistering itself before
+ * it terminates, at reference is not needed. */
+ priv->p_dialog_provider = obj;
+ ret = VLC_SUCCESS;
+ }
+ vlc_mutex_unlock (&provider_lock);
+ return ret;
+}
+
+#undef dialog_Unregister
+/**
+ * Unregisters the dialog provider.
+ * Note that unless you have unregistered the callbacks already, the provider
+ * might still be in use by other threads. Also, you need to cancel all
+ * pending dialogs yourself.
+ */
+int dialog_Unregister (vlc_object_t *obj)
+{
+ libvlc_priv_t *priv = libvlc_priv (obj->p_libvlc);
+ int ret = VLC_EGENERIC;
+
+ vlc_mutex_lock (&provider_lock);
+ if (priv->p_dialog_provider == obj)
+ {
+ priv->p_dialog_provider = NULL;
+ ret = VLC_SUCCESS;
+ }
+ vlc_mutex_unlock (&provider_lock);
+ return ret;
+}
+
+static vlc_object_t *dialog_GetProvider (vlc_object_t *obj)
+{
+ libvlc_priv_t *priv = libvlc_priv (obj->p_libvlc);
+ vlc_object_t *provider;
+
+ vlc_mutex_lock (&provider_lock);
+ if ((provider = priv->p_dialog_provider) != NULL)
+ vlc_object_hold (provider);
+ vlc_mutex_unlock (&provider_lock);
+ return provider;
+}
+
+static
+void dialog_FatalVa (vlc_object_t *obj, const char *title,
+ const char *fmt, va_list ap)
+{
+ char *text;
+
+ vlc_object_t *provider = dialog_GetProvider (obj);
+ if (provider == NULL)
+ {
+ msg_Err (obj, "%s", title);
+ msg_GenericVa (obj, VLC_MSG_ERR, MODULE_STRING, fmt, ap);
+ return;
+ }
+
+ if (vasprintf (&text, fmt, ap) == -1)
+ return;
+
+ dialog_fatal_t dialog = { title, text, };
+ var_SetAddress (provider, "dialog-fatal", &dialog);
+ free (text);
+}
+
+#undef dialog_Fatal
+/**
+ * Notify the user of some fatal error.
+ * This is a fire and forget function.
+ */
+void dialog_Fatal (vlc_object_t *obj, const char *title, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start (ap, fmt);
+ dialog_FatalVa (obj, title, fmt, ap);
+ va_end (ap);
+}
projects / vlc / commitdiff