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-util.h"
#include "e-util/e-html-utils.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>
#include <libgnomevfs/gnome-vfs-mime-handlers.h>

#define PARENT_TYPE (gtk_vbox_get_type ())

static GtkObjectClass *mail_display_parent_class;

static void redisplay (MailDisplay *md);

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

static gboolean
write_data_to_file (CamelMimePart *part, const char *name, gboolean unique)
{
    CamelDataWrapper *data;
    CamelStream *stream_fs;
    int fd;

    g_return_val_if_fail (CAMEL_IS_MIME_PART (part), FALSE);
    data = camel_medium_get_content_object (CAMEL_MEDIUM (part));

    fd = open (name, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
    if (fd == -1 && errno == EEXIST && !unique) {
        GtkWidget *dlg;
        GtkWidget *text;

        dlg = gnome_dialog_new (_("Overwrite file?"),
                    GNOME_STOCK_BUTTON_YES, 
                    GNOME_STOCK_BUTTON_NO,
                    NULL);
        text = gtk_label_new (_("A file by that name already exists.\nOverwrite it?"));
        gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dlg)->vbox), text, TRUE, TRUE, 4);
        gtk_widget_show (text);

        if (gnome_dialog_run_and_close (GNOME_DIALOG (dlg)) != 0)
            return FALSE;
        gtk_widget_destroy (dlg);

        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 (msg);
        g_free (msg);
        return FALSE;
    }

    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 (msg);
        g_free (msg);
        camel_object_unref (CAMEL_OBJECT (stream_fs));
        return FALSE;
    }
    camel_object_unref (CAMEL_OBJECT (stream_fs));
    return TRUE;
}

static char *
make_safe_filename (const char *prefix, CamelMimePart *part)
{
    const char *name = NULL;
    char *safe, *p;

    name = camel_mime_part_get_filename (part);
    if (!name)
        name = "attachment";

    p = strrchr (name, '/');
    if (p)
        safe = g_strdup_printf ("%s%s", prefix, p);
    else
        safe = g_strdup_printf ("%s/%s", prefix, name);

    for (p = strrchr (safe, '/') + 1; *p; p++) {
        if (!isascii ((unsigned char)*p) ||
            strchr (" /'\"`&();|<>${}!", *p))
            *p = '_';
    }

    return safe;
}

static CamelMimePart *
part_for_url (const char *url, MailDisplay *md)
{
    GHashTable *urls;

    urls = g_datalist_get_data (md->data, "urls");
    g_return_val_if_fail (urls != NULL, NULL);
    return g_hash_table_lookup (urls, url);
}

static void
launch_external (const char *url, MailDisplay *md)
{
    const char *command = url + 21;
    char *tmpl, *tmpdir, *filename, *argv[2];
    CamelMimePart *part = part_for_url (url, md);

    tmpl = g_strdup ("/tmp/evolution.XXXXXX");
#ifdef HAVE_MKDTEMP
    tmpdir = mkdtemp (tmpl);
#else
    tmpdir = mktemp (tmpl);
    if (tmpdir) {
        if (mkdir (tmpdir, S_IRWXU) == -1)
            tmpdir = NULL;
    }
#endif
    if (!tmpdir) {
        char *msg = g_strdup_printf ("Could not create temporary "
                         "directory: %s",
                         g_strerror (errno));
        gnome_error_dialog (msg);
        g_free (msg);
        return;
    }

    filename = make_safe_filename (tmpdir, part);

    if (!write_data_to_file (part, filename, TRUE)) {
        g_free (tmpl);
        g_free (filename);
        return;
    }

    argv[0] = (char *)command;
    argv[1] = filename;

    gnome_execute_async (tmpdir, 2, argv);
    g_free (tmpdir);
    g_free (filename);
}

static void
save_data_cb (GtkWidget *widget, gpointer user_data)
{
    GtkFileSelection *file_select = (GtkFileSelection *)
        gtk_widget_get_ancestor (widget, GTK_TYPE_FILE_SELECTION);

    write_data_to_file (user_data,
                gtk_file_selection_get_filename (file_select),
                FALSE);
    gtk_widget_destroy (GTK_WIDGET (file_select));
}

static void
save_data (const char *cid, MailDisplay *md)
{
    GtkFileSelection *file_select;
    char *filename;
    CamelMimePart *part;

    part = part_for_url (cid, md);
    g_return_if_fail (part != NULL);
    filename = make_safe_filename (g_get_home_dir (), part);

    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), part);
    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 gboolean
idle_redisplay (gpointer data)
{
    MailDisplay *md = data;

    md->idle_id = 0;
    redisplay (md);
    return FALSE;
}

static void
queue_redisplay (MailDisplay *md)
{
    if (!md->idle_id) {
        md->idle_id = g_idle_add_full (G_PRIORITY_LOW, idle_redisplay,
                           md, NULL);
    }
}

static void
on_link_clicked (GtkHTML *html, const char *url, gpointer user_data)
{
    MailDisplay *md = user_data;

    if (!g_strncasecmp (url, "news:", 5) ||
        !g_strncasecmp (url, "nntp:", 5))
        g_warning ("Can't handle news URLs yet.");
    else if (!g_strncasecmp (url, "mailto:", 7))
        send_to_url (url);
    else if (!strncmp (url, "cid:", 4))
        save_data (url, md);
    else if (!strncmp (url, "x-evolution-external:", 21))
        launch_external (url, md);
    else if (!strcmp (url, "x-evolution-decode-pgp:")) {
        g_datalist_set_data (md->data, "show_pgp",
                     GINT_TO_POINTER (1));
        queue_redisplay (md);
    } else
        gnome_url_show (url);
}

static gboolean
on_object_requested (GtkHTML *html, GtkHTMLEmbedded *eb, gpointer data)
{
    MailDisplay *md = data;
    GHashTable *urls;
    CamelMedium *medium;
    CamelDataWrapper *wrapper;
    OAF_ServerInfo *component;
    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;
    urls = g_datalist_get_data (md->data, "urls");
    g_return_val_if_fail (urls != NULL, FALSE);

    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);

    component = gnome_vfs_mime_get_default_component (eb->type);
    if (!component)
        return FALSE;

    embedded = bonobo_widget_new_subdoc (component->iid, NULL);
    if (!embedded)
        embedded = bonobo_widget_new_control (component->iid, NULL);
    CORBA_free (component);
    if (!embedded)
        return FALSE;
    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) {
        gtk_object_sink (GTK_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);
    camel_object_unref (CAMEL_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) {
        gtk_object_sink (GTK_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)
{
    MailDisplay *md = user_data;
    GHashTable *urls;

    urls = g_datalist_get_data (md->data, "urls");
    g_return_if_fail (urls != NULL);

    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);
        camel_object_unref (CAMEL_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);
}

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

    va_start (ap, format);
    buf = g_strdup_vprintf (format, ap);
    va_end (ap);

    htmltext = e_text_to_html (buf,
                   E_TEXT_TO_HTML_CONVERT_URLS |
                   E_TEXT_TO_HTML_CONVERT_NL |
                   E_TEXT_TO_HTML_CONVERT_SPACES);
    gtk_html_write (html, stream, "<tt>", 4);
    gtk_html_write (html, stream, htmltext, strlen (htmltext));
    gtk_html_write (html, stream, "</tt>", 5);
    g_free (htmltext);
    g_free (buf);
}

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

    va_start (ap, format);
    buf = g_strdup_vprintf (format, ap);
    va_end (ap);

    htmltext = e_text_to_html (buf, E_TEXT_TO_HTML_CONVERT_NL);
    gtk_html_write (html, stream, "<em><font color=red>", 20);
    gtk_html_write (html, stream, htmltext, strlen (htmltext));
    gtk_html_write (html, stream, "</font></em><br>", 16);
    g_free (htmltext);
    g_free (buf);
}

static void
clear_data (CamelObject *object, gpointer event_data, gpointer user_data)
{
    GData *data = user_data;

    g_datalist_clear (&data);
}

static void
redisplay (MailDisplay *md)
{
    GtkAdjustment *adj;

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

    if (md->current_message) {
        camel_object_ref (CAMEL_OBJECT (md->current_message));
        mail_format_mime_message (md->current_message, md);
    }

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

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

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

/**
 * 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.
 **/
void 
mail_display_set_message (MailDisplay *md, CamelMedium *medium)
{
    /* 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 (md->current_message)
        camel_object_unref (CAMEL_OBJECT (md->current_message));

    md->current_message = (CamelMimeMessage*)medium;

    g_datalist_init (md->data);
    redisplay (md);
    if (medium) {
        camel_object_hook_event (CAMEL_OBJECT (medium), "finalize",
                     clear_data, *(md->data));
    }
}


/*----------------------------------------------------------------------*
 *                     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);

    g_datalist_clear (mail_display->data);
    g_free (mail_display->data);

    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 (void)
{
    MailDisplay *mail_display = gtk_type_new (mail_display_get_type ());
    GtkWidget *scroll, *html;

    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),
                mail_display);
    gtk_signal_connect (GTK_OBJECT (html), "object_requested",
                GTK_SIGNAL_FUNC (on_object_requested),
                mail_display);
    gtk_signal_connect (GTK_OBJECT (html), "link_clicked",
                GTK_SIGNAL_FUNC (on_link_clicked),
                mail_display);
    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);
    mail_display->stream = NULL;
    mail_display->data = g_new0 (GData *, 1);
    g_datalist_init (mail_display->data);

    return GTK_WIDGET (mail_display);
}



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