A camel-stream to wrap Evolution_Mail_MessageStream.

2005-05-27  Not Zed  <NotZed@Ximian.com>

        * em-message-stream.[ch]: A camel-stream to wrap
        Evolution_Mail_MessageStream.

        * evolution-mail-messagestream.[ch]: simplified read-only stream
        interface rather than using bonobo-stream.  It wraps a
        camel-stream only & simplified lifecycle management.

        * evolution-mail-store.c (evolution_mail_store_changed): if we
        have no more listeners, close the camelstore object off.

        * Evolution-DataServer-Mail.idl: changed exceptions to use one
        exception type with details.  Fixed code to use these.

svn path=/trunk/; revision=29418

1 files changed, 144 insertions, 0 deletions

diff --git a/plugins/mail-remote/em-message-stream.c b/plugins/mail-remote/em-message-stream.c
new file mode 100644
index 0000000000..77f6300cb5
--- /dev/null
+++ b/plugins/mail-remote/em-message-stream.c
@@ -0,0 +1,144 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ *  Authors: Michael Zucchi <notzed@novel.com>
+ *
+ *  Copyright 2005 Novell, Inc. (www.novell.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <camel/camel-stream.h>
+#include "em-message-stream.h"
+
+#define d(x) 
+
+#define EMSS_CLASS(x) ((EMMessageStreamClass *)(((CamelObject *)(x))->klass))
+
+static CamelStreamClass *parent_class = NULL;
+
+static ssize_t
+emms_read(CamelStream *stream, char *buffer, size_t n)
+{
+	EMMessageStream *emms = (EMMessageStream *)stream;
+	ssize_t len;
+	Evolution_Mail_Buffer *buf;
+	CORBA_Environment ev = { 0 };
+
+	/* To avoid all of the rount-trip overhead, this could always fire off
+	   one request in advance, to pipeline the data.  Using another thread. */
+
+	if (emms->source == CORBA_OBJECT_NIL) {
+		errno = EBADF;
+		return -1;
+	}
+
+	buf = Evolution_Mail_MessageStream_next(emms->source, n, &ev);
+	if (ev._major != CORBA_NO_EXCEPTION) {
+		CORBA_exception_free(&ev);
+		Evolution_Mail_MessageStream_dispose(emms->source, &ev);
+		emms->source = CORBA_OBJECT_NIL;
+		stream->eos = TRUE;
+		errno = EBADF;
+		return -1;
+	}
+
+	if (buf->_length == 0)
+		stream->eos = TRUE;
+
+	len = buf->_length;
+	memcpy(buffer, buf->_buffer, buf->_length);
+	CORBA_free(buf);
+
+	return len;
+}
+
+static void
+em_message_stream_init (CamelObject *object)
+{
+	/*EMMessageStream *emss = (EMMessageStream *)object;*/
+}
+
+static void
+em_message_stream_finalize (CamelObject *object)
+{
+	EMMessageStream *emms = (EMMessageStream *)object;
+
+	printf("EMMessageStream.finalise()\n");
+
+	if (emms->source) {
+		CORBA_Environment ev = { 0 };
+
+		Evolution_Mail_MessageStream_dispose(emms->source, &ev);
+		if (ev._major != CORBA_NO_EXCEPTION)
+			CORBA_exception_free(&ev);
+
+		CORBA_Object_release(emms->source, &ev);
+		if (ev._major != CORBA_NO_EXCEPTION)
+			CORBA_exception_free(&ev);
+	}
+}
+
+static void
+em_message_stream_class_init (EMMessageStreamClass *klass)
+{
+	CamelStreamClass *stream_class = CAMEL_STREAM_CLASS (klass);
+
+	parent_class = (CamelStreamClass *) CAMEL_STREAM_TYPE;
+
+	stream_class->read = emms_read;
+}
+
+CamelType
+em_message_stream_get_type (void)
+{
+	static CamelType type = CAMEL_INVALID_TYPE;
+	
+	if (type == CAMEL_INVALID_TYPE) {
+		type = camel_type_register (CAMEL_STREAM_TYPE,
+					    "EMMessageStream",
+					    sizeof (EMMessageStream),
+					    sizeof (EMMessageStreamClass),
+					    (CamelObjectClassInitFunc) em_message_stream_class_init,
+					    NULL,
+					    (CamelObjectInitFunc) em_message_stream_init,
+					    (CamelObjectFinalizeFunc) em_message_stream_finalize);
+	}
+	
+	return type;
+}
+
+CamelStream *
+em_message_stream_new(const Evolution_Mail_MessageStream source)
+{
+	EMMessageStream *ems = (EMMessageStream *)camel_object_new(em_message_stream_get_type());
+	CORBA_Environment ev = { 0 };
+
+	ems->source = CORBA_Object_duplicate(source, &ev);
+	if (ev._major != CORBA_NO_EXCEPTION) {
+		CORBA_exception_free(&ev);
+		camel_object_unref(ems);
+		ems = NULL;
+	}
+
+	return (CamelStream *)ems;
+}