path: root/mail/mail-display.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * mail-display.c: Mail display widget
 *
 * Author:
 *   Miguel de Icaza
 *   Bertrand Guiheneuf (bg@aful.org)
 *
 * (C) 2000 Helix Code, Inc.
 */
#include <config.h>
#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
#include <errno.h>
#include <gnome.h>
#include "e-util/e-setup.h"
#include "e-util/e-util.h"
#include "mail-display.h"
#include "mail.h"

#include <bonobo.h>
#include <libgnorba/gnorba.h>
#include <bonobo/bonobo-stream-memory.h>
#include <libgnomevfs/gnome-vfs-mime-info.h>

#define PARENT_TYPE (gtk_vbox_get_type ())

static GtkObjectClass *mail_display_parent_class;


/*----------------------------------------------------------------------*
 *                        Callbacks
 *----------------------------------------------------------------------*/

static void
save_data_eexist_cb (int reply, gpointer user_data)
{
    gboolean *ok = user_data;

    *ok = reply == 0;
    gtk_main_quit ();
}

static void
save_data_cb (GtkWidget *widget, gpointer user_data)
{
    CamelDataWrapper *data = user_data;
    CamelStream *stream_fs;
    GtkFileSelection *file_select = (GtkFileSelection *)
        gtk_widget_get_ancestor (widget, GTK_TYPE_FILE_SELECTION);
    char *name;
    int fd;

    name = gtk_file_selection_get_filename (file_select);

    fd = open (name, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
    if (fd == -1 && errno == EEXIST) {
        gboolean ok = FALSE;

        gnome_ok_cancel_dialog_modal_parented (
            "A file by that name already exists.\nOverwrite it?",
            save_data_eexist_cb, &ok, GTK_WINDOW (file_select));
        gtk_main ();
        if (!ok)
            return;
        fd = open (name, O_WRONLY | O_TRUNC);
    }

    if (fd == -1) {
        char *msg;

        msg = g_strdup_printf ("Could not open file %s:\n%s",
                       name, g_strerror (errno));
        gnome_error_dialog_parented (msg, GTK_WINDOW (file_select));
        return;
    }

    stream_fs = camel_stream_fs_new_with_fd (fd);
    if (camel_data_wrapper_write_to_stream (data, stream_fs) == -1
        || camel_stream_flush (stream_fs) == -1) {
        char *msg;

        msg = g_strdup_printf ("Could not write data: %s", strerror(errno));
        gnome_error_dialog_parented (msg, GTK_WINDOW (file_select));
    }
    gtk_object_unref (GTK_OBJECT (stream_fs));

    gtk_widget_destroy (GTK_WIDGET (file_select));
}

static void
save_data (const char *cid, CamelMimeMessage *message)
{
    GHashTable *urls;
    CamelMimePart *part;
    CamelDataWrapper *data;
    GtkFileSelection *file_select;
    char *filename;

    g_return_if_fail (CAMEL_IS_MIME_MESSAGE (message));
    urls = gtk_object_get_data (GTK_OBJECT (message), "urls");
    part = g_hash_table_lookup (urls, cid);
    g_return_if_fail (CAMEL_IS_MIME_PART (part));
    data = camel_medium_get_content_object (CAMEL_MEDIUM (part));

    filename = (char *)camel_mime_part_get_filename (part);
    if (filename) {
        char *p;

        p = strrchr (filename, '/');
        if (p)
            filename = g_strdup_printf ("%s%s", g_get_home_dir(), p);
        else {
            filename = g_strdup_printf ("%s/%s", g_get_home_dir(),
                            filename);
        }

        for (p = strrchr (filename, '/') + 1; *p; p++) {
            if (!isascii ((unsigned char)*p) ||
                strchr (" /'\"`&();|<>${}!", *p))
                *p = '_';
        }
    } else
        filename = g_strdup_printf ("%s/attachment", g_get_home_dir());

    file_select = GTK_FILE_SELECTION (gtk_file_selection_new ("Save Attachment"));
    gtk_file_selection_set_filename (file_select, filename);
    g_free (filename);

    gtk_signal_connect (GTK_OBJECT (file_select->ok_button), "clicked", 
                GTK_SIGNAL_FUNC (save_data_cb), data);
    gtk_signal_connect_object (GTK_OBJECT (file_select->cancel_button),
                   "clicked",
                   GTK_SIGNAL_FUNC (gtk_widget_destroy),
                   GTK_OBJECT (file_select));

    gtk_widget_show (GTK_WIDGET (file_select));
}

static void
on_link_clicked (GtkHTML *html, const char *url, gpointer user_data)
{
    CamelMimeMessage *message;

    message = gtk_object_get_data (GTK_OBJECT (html), "message");

    if (!strncasecmp (url, "news:", 5) ||
        !strncasecmp (url, "nntp:", 5))
        g_warning ("Can't handle news URLs yet.");
    else if (!strncasecmp (url, "mailto:", 7))
        send_to_url (url);
    else if (!strncasecmp (url, "cid:", 4))
        save_data (url, message);
    else
        gnome_url_show (url);
}

static void 
embeddable_destroy_cb (GtkObject *obj, gpointer user_data)
{
    BonoboWidget *be;      /* bonobo embeddable */
    BonoboViewFrame *vf;   /* the embeddable view frame */
    BonoboObjectClient* server;
    CORBA_Environment ev;

    be = BONOBO_WIDGET (obj);
    server = bonobo_widget_get_server (be);

    vf = bonobo_widget_get_view_frame (be);
    bonobo_control_frame_control_deactivate (
        BONOBO_CONTROL_FRAME (vf));
    /* w = bonobo_control_frame_get_widget (BONOBO_CONTROL_FRAME (vf)); */
    
    /* gtk_widget_destroy (w); */
    
    CORBA_exception_init (&ev);
    Bonobo_Unknown_unref (
        bonobo_object_corba_objref (BONOBO_OBJECT(server)), &ev);
    CORBA_Object_release (
        bonobo_object_corba_objref (BONOBO_OBJECT(server)), &ev);

    CORBA_exception_free (&ev);
    bonobo_object_unref (BONOBO_OBJECT (vf));
}

static gboolean
on_object_requested (GtkHTML *html, GtkHTMLEmbedded *eb, gpointer data)
{
    CamelMimeMessage *message;
    GHashTable *urls;
    CamelMedium *medium;
    CamelDataWrapper *wrapper;
    const char *goad_id;
    GtkWidget *embedded;
    BonoboObjectClient *server;
    Bonobo_PersistStream persist;   
    CORBA_Environment ev;
    GByteArray *ba;
    CamelStream *cstream;
    BonoboStream *bstream;

    if (strncmp (eb->classid, "cid:", 4) != 0)
        return FALSE;
    message = gtk_object_get_data (GTK_OBJECT (html), "message");
    urls = gtk_object_get_data (GTK_OBJECT (message), "urls");
    medium = g_hash_table_lookup (urls, eb->classid);
    g_return_val_if_fail (CAMEL_IS_MEDIUM (medium), FALSE);
    wrapper = camel_medium_get_content_object (medium);

    goad_id = gnome_vfs_mime_get_value (eb->type, "bonobo-goad-id");
    if (!goad_id) {
        char *main_type =
            g_strndup (eb->type, strcspn (eb->type, "/"));

        goad_id = gnome_vfs_mime_get_value (main_type,
                            "bonobo-goad-id");
        g_free (main_type);
    }
    if (!goad_id)
        return FALSE;

    embedded = bonobo_widget_new_subdoc (goad_id, NULL);
    if (!embedded)
        return FALSE;
    gtk_signal_connect (GTK_OBJECT (embedded), "destroy",
                embeddable_destroy_cb, NULL);
    server = bonobo_widget_get_server (BONOBO_WIDGET (embedded));

    persist = (Bonobo_PersistStream) bonobo_object_client_query_interface (
        server, "IDL:Bonobo/PersistStream:1.0", NULL);
    if (persist == CORBA_OBJECT_NIL) {
        bonobo_object_unref (BONOBO_OBJECT (embedded));
        return FALSE;
    }

    /* Write the data to a CamelStreamMem... */
    ba = g_byte_array_new ();
    cstream = camel_stream_mem_new_with_byte_array (ba);
    camel_data_wrapper_write_to_stream (wrapper, cstream);

    /* ...convert the CamelStreamMem to a BonoboStreamMem... */
    bstream = bonobo_stream_mem_create (ba->data, ba->len, TRUE, FALSE);
    gtk_object_unref (GTK_OBJECT (cstream));

    /* ...and hydrate the PersistStream from the BonoboStream. */
    CORBA_exception_init (&ev);
    Bonobo_PersistStream_load (persist,
                   bonobo_object_corba_objref (
                       BONOBO_OBJECT (bstream)),
                   eb->type, &ev);
    bonobo_object_unref (BONOBO_OBJECT (bstream));
    Bonobo_Unknown_unref (persist, &ev);
    CORBA_Object_release (persist, &ev);

    if (ev._major != CORBA_NO_EXCEPTION) {
        bonobo_object_unref (BONOBO_OBJECT (embedded));
        CORBA_exception_free (&ev);             
        return FALSE;
    }
    CORBA_exception_free (&ev);

    gtk_widget_show (embedded);
    gtk_container_add (GTK_CONTAINER (eb), embedded);

    return TRUE;
}

static void
on_url_requested (GtkHTML *html, const char *url, GtkHTMLStream *handle,
          gpointer user_data)
{
    CamelMimeMessage *message;
    GHashTable *urls;

    message = gtk_object_get_data (GTK_OBJECT (html), "message");
    urls = gtk_object_get_data (GTK_OBJECT (message), "urls");

    user_data = g_hash_table_lookup (urls, url);
    if (user_data == NULL)
        return;

    if (strncmp (url, "cid:", 4) == 0) {
        CamelMedium *medium = user_data;
        CamelDataWrapper *data;
        CamelStream *stream_mem;
        GByteArray *ba;

        g_return_if_fail (CAMEL_IS_MEDIUM (medium));
        data = camel_medium_get_content_object (medium);

        ba = g_byte_array_new ();
        stream_mem = camel_stream_mem_new_with_byte_array (ba);
        camel_data_wrapper_write_to_stream (data, stream_mem);
        gtk_html_write (html, handle, ba->data, ba->len);
        gtk_object_unref (GTK_OBJECT (stream_mem));
    } else if (strncmp (url, "x-evolution-data:", 17) == 0) {
        GByteArray *ba = user_data;

        g_return_if_fail (ba != NULL);
        gtk_html_write (html, handle, ba->data, ba->len);
    }
}

void
mail_html_write (GtkHTML *html, GtkHTMLStream *stream,
         const char *format, ...)
{
    char *buf;
    va_list ap;

    va_start (ap, format);
    buf = g_strdup_vprintf (format, ap);
    va_end (ap);
    gtk_html_write (html, stream, buf, strlen (buf));
    g_free (buf);
}


/**
 * mail_display_set_message:
 * @mail_display: the mail display object
 * @medium: the input camel medium, or %NULL
 *
 * Makes the mail_display object show the contents of the medium
 * param. This means feeding mail_display->body_stream and
 * mail_display->headers_stream with html.
 *
 **/
void 
mail_display_set_message (MailDisplay *mail_display, 
              CamelMedium *medium)
{
    GtkHTMLStream *stream;
    GtkAdjustment *adj;

    /*
     * For the moment, we deal only with CamelMimeMessage, but in
     * the future, we should be able to deal with any medium.
     */
    if (medium && !CAMEL_IS_MIME_MESSAGE (medium))
        return;

    /* Clean up from previous message. */
    if (mail_display->current_message)
        gtk_object_unref (GTK_OBJECT (mail_display->current_message));

    mail_display->current_message = (CamelMimeMessage*)medium;

    stream = gtk_html_begin (mail_display->html);
    mail_html_write (mail_display->html, stream, "%s%s", HTML_HEADER,
             "<BODY TEXT=\"#000000\" BGCOLOR=\"#FFFFFF\">\n");

    if (medium) {
        gtk_object_ref (GTK_OBJECT (medium));
        gtk_object_set_data (GTK_OBJECT (mail_display->html),
                     "message", medium);
        mail_format_mime_message (CAMEL_MIME_MESSAGE (medium),
                      mail_display->html, stream,
                      CAMEL_MIME_MESSAGE (medium));
    }

    mail_html_write (mail_display->html, stream, "</BODY></HTML>\n");
    gtk_html_end (mail_display->html, stream, GTK_HTML_STREAM_OK);

    adj = e_scroll_frame_get_vadjustment (mail_display->scroll);
    gtk_adjustment_set_value (adj, 0);
    e_scroll_frame_set_vadjustment (mail_display->scroll, adj);

    adj = e_scroll_frame_get_hadjustment (mail_display->scroll);
    gtk_adjustment_set_value (adj, 0);
    e_scroll_frame_set_hadjustment (mail_display->scroll, adj);
}


/*----------------------------------------------------------------------*
 *                     Standard Gtk+ Class functions
 *----------------------------------------------------------------------*/

static void
mail_display_init (GtkObject *object)
{
    MailDisplay *mail_display = MAIL_DISPLAY (object);

    /* various other initializations */
    mail_display->current_message = NULL;
}

static void
mail_display_destroy (GtkObject *object)
{
    /* MailDisplay *mail_display = MAIL_DISPLAY (object); */

    mail_display_parent_class->destroy (object);
}

static void
mail_display_class_init (GtkObjectClass *object_class)
{
    object_class->destroy = mail_display_destroy;
    mail_display_parent_class = gtk_type_class (PARENT_TYPE);
}

GtkWidget *
mail_display_new (FolderBrowser *parent_folder_browser)
{
    MailDisplay *mail_display = gtk_type_new (mail_display_get_type ());
    GtkWidget *scroll, *html;

    g_assert (parent_folder_browser);

    mail_display->parent_folder_browser = parent_folder_browser;

    gtk_box_set_homogeneous (GTK_BOX (mail_display), FALSE);
    gtk_widget_show (GTK_WIDGET (mail_display));

    scroll = e_scroll_frame_new (NULL, NULL);
    e_scroll_frame_set_policy (E_SCROLL_FRAME (scroll),
                   GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    e_scroll_frame_set_shadow_type (E_SCROLL_FRAME (scroll), GTK_SHADOW_IN);
    gtk_box_pack_start_defaults (GTK_BOX (mail_display), GTK_WIDGET (scroll));
    gtk_widget_show (GTK_WIDGET (scroll));

    html = gtk_html_new ();
    gtk_html_set_editable (GTK_HTML (html), FALSE);
    gtk_signal_connect (GTK_OBJECT (html), "url_requested",
                GTK_SIGNAL_FUNC (on_url_requested), NULL);
    gtk_signal_connect (GTK_OBJECT (html), "object_requested",
                GTK_SIGNAL_FUNC (on_object_requested), NULL);
    gtk_signal_connect (GTK_OBJECT (html), "link_clicked",
                GTK_SIGNAL_FUNC (on_link_clicked), NULL);
    gtk_container_add (GTK_CONTAINER (scroll), html);
    gtk_widget_show (GTK_WIDGET (html));

    mail_display->scroll = E_SCROLL_FRAME (scroll);
    mail_display->html = GTK_HTML (html);

    return GTK_WIDGET (mail_display);
}



E_MAKE_TYPE (mail_display, "MailDisplay", MailDisplay, mail_display_class_init, mail_display_init, PARENT_TYPE);