path: root/calendar/gui/dialogs/cal-attachment.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/*
 *  Authors: Harish Krishnaswamy <kharish@novell.com>
 *  Copyright 2004 Novell Inc. <www.novell.com>
 *
 *  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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 *
 */


/* Much of this file has been shamelessly copied from the mail attachment
 * handling code, including the fixmes. Modifications/Additions that are
 * specific to the calendar component have been flagged by some comments
 * fwiw */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/stat.h>
#include <string.h>
#include <errno.h>

#include <gtk/gtknotebook.h>
#include <gtk/gtktogglebutton.h>
#include <gtk/gtkdialog.h>
#include <libgnomevfs/gnome-vfs.h>
#include <libgnome/gnome-i18n.h>

#include "e-util/e-mktemp.h"
#include <camel/camel.h>

#include "comp-editor.h"
#include "cal-attachment.h"


enum {
    CHANGED,
    LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };

static GObjectClass *parent_class = NULL;


static void
changed (CalAttachment *attachment)
{
    g_signal_emit (attachment, signals[CHANGED], 0);
}


/* GtkObject methods.  */

static void
finalise(GObject *object)
{
    CalAttachment *attachment;
    
    attachment = CAL_ATTACHMENT (object);
    
    camel_object_unref (attachment->body);
    if (attachment->pixbuf_cache != NULL)
        g_object_unref (attachment->pixbuf_cache);
    
        G_OBJECT_CLASS (parent_class)->finalize (object);
}


/* Signals.  */

static void
real_changed (CalAttachment *cal_attachment)
{
    g_return_if_fail (E_IS_CAL_ATTACHMENT (cal_attachment));
}


static void
class_init (CalAttachmentClass *klass)
{
    GObjectClass *object_class;
    
    object_class = (GObjectClass*) klass;
    parent_class = g_type_class_ref (G_TYPE_OBJECT);
    
    object_class->finalize = finalise;
    klass->changed = real_changed;
    
    signals[CHANGED] = g_signal_new ("changed",
                     E_TYPE_CAL_ATTACHMENT,
                     G_SIGNAL_RUN_FIRST,
                     G_STRUCT_OFFSET (CalAttachmentClass, changed),
                     NULL,
                     NULL,
                     g_cclosure_marshal_VOID__VOID,
                     G_TYPE_NONE, 0);
}

static void
init (CalAttachment *cal_attachment)
{
    cal_attachment->editor_gui = NULL;
    cal_attachment->body = NULL;
    cal_attachment->size = 0;
    cal_attachment->pixbuf_cache = NULL;
}

GType
cal_attachment_get_type (void)
{
    static GType type = 0;
    
    if (type == 0) {
        static const GTypeInfo info = {
            sizeof (CalAttachmentClass),
            NULL,
            NULL,
            (GClassInitFunc) class_init,
            NULL,
            NULL,
            sizeof (CalAttachment),
            0,
            (GInstanceInitFunc) init,
        };
        
        type = g_type_register_static (G_TYPE_OBJECT, "CalAttachment", &info, 0);
    }
    
    return type;
}

/**
 * cal_attachment_guess_mime_type:
 * @file_name: filename
 * Returns the guessed mime type of the file given by #file_name
 **/ 
 
static char *
cal_attachment_guess_mime_type (const char *file_name)
{
    GnomeVFSFileInfo *info;
    GnomeVFSResult result;
    char *type = NULL;

    info = gnome_vfs_file_info_new ();
    result = gnome_vfs_get_file_info (file_name, info,
                      GNOME_VFS_FILE_INFO_GET_MIME_TYPE |
                      GNOME_VFS_FILE_INFO_FORCE_SLOW_MIME_TYPE |
                      GNOME_VFS_FILE_INFO_FOLLOW_LINKS);
    if (result == GNOME_VFS_OK)
        type = g_strdup (gnome_vfs_file_info_get_mime_type (info));

    gnome_vfs_file_info_unref (info);

    return type;
}


/**
 * cal_attachment_new:
 * @file_name: filename to attach
 * @disposition: Content-Disposition of the attachment
 * @ex: exception
 *
 * Return value: the new attachment, or %NULL on error
 **/
CalAttachment *
cal_attachment_new (const char *file_name,
                   const char *disposition,
                   CamelException *ex)
{
    CalAttachment *new;
    CamelMimePart *part;
    CamelDataWrapper *wrapper;
    CamelStream *stream;
    struct stat statbuf;
    char *mime_type;
    char *filename;
    
    g_return_val_if_fail (file_name != NULL, NULL);
    
    if (stat (file_name, &statbuf) < 0) {
        camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
                      _("Cannot attach file %s: %s"),
                      file_name, g_strerror (errno));
        return NULL;
    }
    
    /* return if it's not a regular file */
    if (!S_ISREG (statbuf.st_mode)) {
        camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
                      _("Cannot attach file %s: not a regular file"),
                      file_name);
        return NULL;
    }
    
    stream = camel_stream_fs_new_with_name (file_name, O_RDONLY, 0);
    if (!stream) {
        camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
                      _("Cannot attach file %s: %s"),
                      file_name, g_strerror (errno));
        return NULL;
    }
    
    mime_type = cal_attachment_guess_mime_type (file_name);
    if (mime_type) {
        if (!g_ascii_strcasecmp (mime_type, "message/rfc822")) {
            wrapper = (CamelDataWrapper *) camel_mime_message_new ();
        } else {
            wrapper = camel_data_wrapper_new ();
        }
        
        camel_data_wrapper_construct_from_stream (wrapper, stream);
        camel_data_wrapper_set_mime_type (wrapper, mime_type);
        g_free (mime_type);
    } else {
        wrapper = camel_data_wrapper_new ();
        camel_data_wrapper_construct_from_stream (wrapper, stream);
        camel_data_wrapper_set_mime_type (wrapper, "application/octet-stream");
    }
    
    camel_object_unref (stream);
    
    part = camel_mime_part_new ();
    camel_medium_set_content_object (CAMEL_MEDIUM (part), wrapper);
    camel_object_unref (wrapper);
    
    camel_mime_part_set_disposition (part, disposition);
    filename = g_path_get_basename (file_name);
    camel_mime_part_set_filename (part, filename);
    g_free (filename);
    
#if 0
    /* Note: Outlook 2002 is broken with respect to Content-Ids on
           non-multipart/related parts, so as an interoperability
           workaround, don't set a Content-Id on these parts. Fixes
           bug #10032 */
    /* set the Content-Id */
    content_id = camel_header_msgid_generate ();
    camel_mime_part_set_content_id (part, content_id);
    g_free (content_id);
#endif
    
    new = g_object_new (E_TYPE_CAL_ATTACHMENT, NULL);
    new->editor_gui = NULL;
    new->body = part;
    new->size = statbuf.st_size;
    new->guessed_type = TRUE;
    
    return new;
}


/**
 * cal_attachment_new_from_mime_part:
 * @part: a CamelMimePart
 * 
 * Return value: a new CalAttachment based on the mime part
 **/
CalAttachment *
cal_attachment_new_from_mime_part (CamelMimePart *part)
{
    CalAttachment *new;
    CamelMimePart *mime_part;
    CamelStream *stream;
    
    g_return_val_if_fail (CAMEL_IS_MIME_PART (part), NULL);
    
    stream = camel_stream_mem_new ();
    if (camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (part), stream) == -1) {
        camel_object_unref (stream);
        return NULL;
    }
    
    camel_stream_reset (stream);
    mime_part = camel_mime_part_new ();
    
    if (camel_data_wrapper_construct_from_stream (CAMEL_DATA_WRAPPER (mime_part), stream) == -1) {
        camel_object_unref (mime_part);
        camel_object_unref (stream);
        return NULL;
    }
    
    camel_object_unref (stream);
    
    new = g_object_new (E_TYPE_CAL_ATTACHMENT, NULL);
    new->editor_gui = NULL;
    new->body = mime_part;
    new->guessed_type = FALSE;
    new->size = 0;
    
    return new;
}


/* The attachment property dialog.  */

typedef struct {
    GtkWidget *dialog;
    GtkEntry *file_name_entry;
    GtkEntry *description_entry;
    GtkEntry *mime_type_entry;
    GtkToggleButton *disposition_checkbox;
    CalAttachment *attachment;
} DialogData;

static void
destroy_dialog_data (DialogData *data)
{
    g_free (data);
}

/*
 * fixme: I am converting EVERYTHING to/from UTF-8, although mime types
 * are in ASCII. This is not strictly necessary, but we want to be
 * consistent and possibly check for errors somewhere.
 */

static void
set_entry (GladeXML *xml, const char *widget_name, const char *value)
{
    GtkEntry *entry;
    
    entry = GTK_ENTRY (glade_xml_get_widget (xml, widget_name));
    if (entry == NULL)
        g_warning ("Entry for `%s' not found.", widget_name);
    else
        gtk_entry_set_text (entry, value ? value : "");
}

static void
connect_widget (GladeXML *gui, const char *name, const char *signal_name,
        GCallback func, gpointer data)
{
    GtkWidget *widget;
    
    widget = glade_xml_get_widget (gui, name);
    g_signal_connect (widget, signal_name, func, data);
}

static void
close_cb (GtkWidget *widget, gpointer data)
{
    CalAttachment *attachment;
    DialogData *dialog_data;
    
    dialog_data = (DialogData *) data;
    attachment = dialog_data->attachment;
    
    gtk_widget_destroy (dialog_data->dialog);
    g_object_unref (attachment->editor_gui);
    attachment->editor_gui = NULL;
    
    g_object_unref (attachment);
    
    destroy_dialog_data (dialog_data);
}

static void
ok_cb (GtkWidget *widget, gpointer data)
{
    DialogData *dialog_data;
    CalAttachment *attachment;
    const char *str;
    
    dialog_data = (DialogData *) data;
    attachment = dialog_data->attachment;
    
    str = gtk_entry_get_text (dialog_data->file_name_entry);
    camel_mime_part_set_filename (attachment->body, str);
    
    str = gtk_entry_get_text (dialog_data->description_entry);
    camel_mime_part_set_description (attachment->body, str);
    
    str = gtk_entry_get_text (dialog_data->mime_type_entry);
    camel_mime_part_set_content_type (attachment->body, str);
    
    camel_data_wrapper_set_mime_type(camel_medium_get_content_object(CAMEL_MEDIUM (attachment->body)), str);
    
    switch (gtk_toggle_button_get_active (dialog_data->disposition_checkbox)) {
    case 0:
        camel_mime_part_set_disposition (attachment->body, "attachment");
        break;
    case 1:
        camel_mime_part_set_disposition (attachment->body, "inline");
        break;
    default:
        /* Hmmmm? */
        break;
    }
    
    changed (attachment);
    close_cb (widget, data);
}

static void
response_cb (GtkWidget *widget, gint response, gpointer data)
{
    if (response == GTK_RESPONSE_OK)
        ok_cb (widget, data);
    else
        close_cb (widget, data);
}

void
cal_attachment_edit (CalAttachment *attachment, GtkWidget *parent)
{
    CamelContentType *content_type;
    const char *disposition;
    DialogData *dialog_data;
    GladeXML *editor_gui;
    char *type;
    
    g_return_if_fail (attachment != NULL);
    g_return_if_fail (E_IS_CAL_ATTACHMENT (attachment));
    
    if (attachment->editor_gui != NULL) {
        GtkWidget *window;
        
        window = glade_xml_get_widget (attachment->editor_gui,
                           "dialog");
        gdk_window_show (window->window);
        return;
    }
    
    editor_gui = glade_xml_new (EVOLUTION_GLADEDIR "/cal-attachment.glade",
                    NULL, NULL);
    if (editor_gui == NULL) {
        g_warning ("Cannot load `cal-attachment.glade'");
        return;
    }
    
    attachment->editor_gui = editor_gui;
    
    gtk_window_set_transient_for
        (GTK_WINDOW (glade_xml_get_widget (editor_gui, "dialog")),
         GTK_WINDOW (gtk_widget_get_toplevel (parent)));
    
    dialog_data = g_new (DialogData, 1);
    g_object_ref (attachment);
    dialog_data->attachment = attachment;
    dialog_data->dialog = glade_xml_get_widget (editor_gui, "dialog");
    dialog_data->file_name_entry = GTK_ENTRY (
        glade_xml_get_widget (editor_gui, "file_name_entry"));
    dialog_data->description_entry = GTK_ENTRY (
        glade_xml_get_widget (editor_gui, "description_entry"));
    dialog_data->mime_type_entry = GTK_ENTRY (
        glade_xml_get_widget (editor_gui, "mime_type_entry"));
    dialog_data->disposition_checkbox = GTK_TOGGLE_BUTTON (
        glade_xml_get_widget (editor_gui, "disposition_checkbox"));
    
    set_entry (editor_gui, "file_name_entry",
           camel_mime_part_get_filename (attachment->body));
    set_entry (editor_gui, "description_entry",
           camel_mime_part_get_description (attachment->body));
    content_type = camel_mime_part_get_content_type (attachment->body);
    type = camel_content_type_simple (content_type);
    set_entry (editor_gui, "mime_type_entry", type);
    g_free (type);
    
    disposition = camel_mime_part_get_disposition (attachment->body);
    gtk_toggle_button_set_active (dialog_data->disposition_checkbox,
                      disposition && !g_ascii_strcasecmp (disposition, "inline"));
    
    connect_widget (editor_gui, "dialog", "response", (GCallback)response_cb, dialog_data);
#warning "signal connect while alive"   
    /* make sure that when the composer gets hidden/closed that our windows also close */
    parent = gtk_widget_get_toplevel (parent);
    gtk_signal_connect_while_alive (GTK_OBJECT (parent), "destroy", (GCallback)close_cb, dialog_data,
                    GTK_OBJECT (dialog_data->dialog));
    gtk_signal_connect_while_alive (GTK_OBJECT (parent), "hide", (GCallback)close_cb, dialog_data,
                    GTK_OBJECT (dialog_data->dialog));
}