/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Authors: Jeffrey Stedfast <fejj@ximian.com>
* Michael Zucchi <notzed@ximian.com>
*
* Copyright 2001 Ximian, Inc. (www.ximian.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 <camel/camel-stream.h>
#include <camel/camel-object.h>
#include <gtkhtml/gtkhtml.h>
#include <gtkhtml/gtkhtml-stream.h>
#include <gtk/gtkmain.h>
#include "em-camel-stream.h"
#include "mail-mt.h"
#define EMCS_BUFFER_SIZE (4096)
#define LOG_STREAM 1
#define d(x)
enum _write_msg_t {
EMCS_WRITE,
EMCS_FLUSH,
EMCS_CLOSE_OK,
EMCS_CLOSE_ERROR,
};
struct _write_msg {
EMsg msg;
enum _write_msg_t op;
const char *data;
size_t n;
};
static void em_camel_stream_class_init (EMCamelStreamClass *klass);
static void em_camel_stream_init (CamelObject *object);
static void em_camel_stream_finalize (CamelObject *object);
static ssize_t stream_write(CamelStream *stream, const char *buffer, size_t n);
static int stream_close(CamelStream *stream);
static int stream_flush(CamelStream *stream);
static CamelStreamClass *parent_class = NULL;
CamelType
em_camel_stream_get_type (void)
{
static CamelType type = CAMEL_INVALID_TYPE;
if (type == CAMEL_INVALID_TYPE) {
type = camel_type_register (CAMEL_STREAM_TYPE,
"EMCamelStream",
sizeof (EMCamelStream),
sizeof (EMCamelStreamClass),
(CamelObjectClassInitFunc) em_camel_stream_class_init,
NULL,
(CamelObjectInitFunc) em_camel_stream_init,
(CamelObjectFinalizeFunc) em_camel_stream_finalize);
}
return type;
}
static void
em_camel_stream_class_init (EMCamelStreamClass *klass)
{
CamelStreamClass *stream_class = CAMEL_STREAM_CLASS (klass);
parent_class = (CamelStreamClass *) CAMEL_STREAM_TYPE;
/* virtual method overload */
stream_class->write = stream_write;
stream_class->flush = stream_flush;
stream_class->close = stream_close;
}
static gboolean
emcs_gui_received(GIOChannel *source, GIOCondition cond, void *data)
{
EMCamelStream *estream = data;
struct _write_msg *msg;
d(printf("%p: gui sync op job waiting\n", estream));
msg = (struct _write_msg *)e_msgport_get(estream->data_port);
/* Should never happen ... */
if (msg == NULL)
return TRUE;
d(printf("%p: running sync op %d\n", estream, msg->op));
/* force out any pending data before doing anything else */
if (estream->used > 0) {
d(printf("sync write %d\n", estream->used));
if (estream->html_stream)
gtk_html_stream_write(estream->html_stream, estream->buffer, estream->used);
estream->used = 0;
}
switch (msg->op) {
case EMCS_WRITE:
d(printf("sync write %d\n", msg->n));
if (estream->html_stream)
gtk_html_stream_write(estream->html_stream, msg->data, msg->n);
break;
case EMCS_FLUSH:
stream_flush((CamelStream *)estream);
break;
case EMCS_CLOSE_OK:
if (estream->html_stream) {
gtk_html_stream_close(estream->html_stream, GTK_HTML_STREAM_OK);
estream->html_stream = NULL;
}
break;
case EMCS_CLOSE_ERROR:
if (estream->html_stream) {
gtk_html_stream_close(estream->html_stream, GTK_HTML_STREAM_ERROR);
estream->html_stream = NULL;
}
break;
}
e_msgport_reply((EMsg *)msg);
d(printf("%p: gui sync op jobs done\n", estream));
return TRUE;
}
static void
em_camel_stream_init (CamelObject *object)
{
EMCamelStream *estream = (EMCamelStream *)object;
estream->data_port = e_msgport_new();
estream->reply_port = e_msgport_new();
estream->gui_channel = g_io_channel_unix_new(e_msgport_fd(estream->data_port));
estream->gui_watch = g_io_add_watch(estream->gui_channel, G_IO_IN, emcs_gui_received, estream);
estream->used = 0;
estream->buffer = g_malloc(EMCS_BUFFER_SIZE);
d(printf("%p: new estream\n", estream));
}
static void
sync_op(EMCamelStream *estream, enum _write_msg_t op, const char *data, size_t n)
{
struct _write_msg msg;
d(printf("%p: launching sync op %d\n", estream, op));
/* we do everything synchronous, we should never have any locks, and
this prevents overflow from banked up data */
msg.msg.reply_port = estream->reply_port;
msg.op = op;
msg.data = data;
msg.n = n;
e_msgport_put(estream->data_port, &msg.msg);
e_msgport_wait(estream->reply_port);
g_assert(e_msgport_get(msg.msg.reply_port) == &msg.msg);
d(printf("%p: returned sync op %d\n", estream, op));
}
static void
em_camel_stream_finalize (CamelObject *object)
{
EMCamelStream *estream = (EMCamelStream *)object;
d(printf("%p: finalising stream\n", object));
if (estream->html_stream) {
d(printf("%p: html stream still open - error\n", object));
if (pthread_self() == mail_gui_thread)
gtk_html_stream_close(estream->html_stream, GTK_HTML_STREAM_ERROR);
else
sync_op(estream, EMCS_CLOSE_ERROR, NULL, 0);
}
/* TODO: is this stuff safe to do in another thread? */
g_source_remove(estream->gui_watch);
g_io_channel_unref(estream->gui_channel);
e_msgport_destroy(estream->data_port);
estream->data_port = NULL;
e_msgport_destroy(estream->reply_port);
estream->reply_port = NULL;
g_free(estream->buffer);
}
static ssize_t
stream_write (CamelStream *stream, const char *buffer, size_t n)
{
EMCamelStream *estream = EM_CAMEL_STREAM (stream);
if (estream->html_stream == NULL)
return -1;
#ifdef LOG_STREAM
if (estream->save)
fwrite(buffer, sizeof(char), n, estream->save);
#endif
if (pthread_self() == mail_gui_thread)
gtk_html_stream_write(estream->html_stream, buffer, n);
else {
#if 1
size_t left = EMCS_BUFFER_SIZE-estream->used;
/* A super-simple buffer, if we get too much to fit, just do a sync
write, which will implicitly clear our previous writes first */
d(printf("thread write '%d'\n", n));
if (n >= left) {
sync_op(estream, EMCS_WRITE, buffer, n);
} else {
memcpy(estream->buffer + estream->used, buffer, n);
estream->used += n;
}
#else
sync_op(estream, EMCS_WRITE, buffer, n);
#endif
}
return (ssize_t) n;
}
static int
stream_flush(CamelStream *stream)
{
EMCamelStream *estream = (EMCamelStream *)stream;
if (estream->html_stream) {
if (pthread_self() == mail_gui_thread) {
/* FIXME: flush html stream via gtkhtml_stream_flush which doens't exist yet ... */
while (gtk_events_pending ())
gtk_main_iteration ();
} else {
sync_op(estream, EMCS_FLUSH, NULL, 0);
}
}
return 0;
}
static int
stream_close(CamelStream *stream)
{
EMCamelStream *estream = (EMCamelStream *)stream;
d(printf("%p: closing stream\n", stream));
#ifdef LOG_STREAM
if (estream->save) {
fclose(estream->save);
estream->save = NULL;
}
#endif
if (estream->html_stream) {
if (pthread_self() == mail_gui_thread) {
gtk_html_stream_close(estream->html_stream, GTK_HTML_STREAM_OK);
estream->html_stream = NULL;
} else {
sync_op(estream, EMCS_CLOSE_OK, NULL, 0);
}
}
return 0;
}
static void
emcs_gtkhtml_destroy(struct _GtkHTML *html, EMCamelStream *emcs)
{
d(printf("%p: emcs gtkhtml destroy\n", emcs));
emcs->html = NULL;
emcs->html_stream = NULL;
}
/* TODO: Could pass NULL for html_stream, and do a gtk_html_begin
on first data -> less flashing */
CamelStream *
em_camel_stream_new(struct _GtkHTML *html, struct _GtkHTMLStream *html_stream)
{
EMCamelStream *new;
new = EM_CAMEL_STREAM (camel_object_new (EM_CAMEL_STREAM_TYPE));
new->html_stream = html_stream;
g_signal_connect(html, "destroy", G_CALLBACK(emcs_gtkhtml_destroy), new);
#ifdef LOG_STREAM
{
static int count;
char name[32];
sprintf(name, "camel-stream.%d.html", count++);
printf("saving raw html to '%s'\n", name);
new->save = fopen(name, "w");
}
#endif
return CAMEL_STREAM (new);
}
