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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * eab-vcard-control.c
 *
 * Copyright (C) 1999, 2000, 2001, 2002, 2003, Ximian, Inc.
 *
 * 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * Authors:
 *    Chris Lahey <clahey@ximian.com>
 *    Chris Toshok <toshok@ximian.com>
 */

#include <config.h>
#include <string.h>

#include <gtk/gtk.h>
#include <bonobo/bonobo-generic-factory.h>
#include <bonobo/bonobo-persist.h>
#include <bonobo/bonobo-persist-stream.h>
#include <bonobo/bonobo-stream-client.h>
#include <e-util/e-util.h>

#include <libebook/e-book.h>
#include <libebook/e-contact.h>
#include <addressbook/gui/component/addressbook.h>
#include <addressbook/gui/widgets/eab-contact-display.h>
#include <addressbook/util/eab-book-util.h>

#include "eab-vcard-control.h"
#include "eab-contact-merging.h"

typedef struct {
    EABContactDisplay *display;
    GList *card_list;
    GtkWidget *label;
    EABContactDisplayRenderMode render_mode;
} EABVCardControl;

#define VCARD_CONTROL_ID "OAFIID:GNOME_Evolution_Addressbook_VCard_Control:" BASE_VERSION

/*
 * Bonobo::PersistStream
 *
 * These two functions implement the Bonobo::PersistStream load and
 * save methods which allow data to be loaded into and out of the
 * BonoboObject.
 */
static char *
stream_read (Bonobo_Stream stream)
{
    Bonobo_Stream_iobuf *buffer;
    CORBA_Environment    ev;
    char *data = NULL;
    gint length = 0;

    CORBA_exception_init (&ev);
    do {
#define READ_CHUNK_SIZE 65536
        Bonobo_Stream_read (stream, READ_CHUNK_SIZE,
                    &buffer, &ev);

        if (ev._major != CORBA_NO_EXCEPTION) {
            CORBA_exception_free (&ev);
            return NULL;
        }

        if (buffer->_length <= 0)
            break;

        data = g_realloc (data, length + buffer->_length + 1);

        memcpy (data + length, buffer->_buffer, buffer->_length);

        length += buffer->_length;

        CORBA_free (buffer);
    } while (1);

    CORBA_free (buffer);
    CORBA_exception_free (&ev);

    if (data)
        data[length] = '\0';
    else
        data = g_strdup("");

    return data;
} /* stream_read */

/*
 * This function implements the Bonobo::PersistStream:load method.
 */
static void
pstream_load (BonoboPersistStream *ps, const Bonobo_Stream stream,
          Bonobo_Persist_ContentType type, void *data,
          CORBA_Environment *ev)
{
    GList *list;
    char *vcard;
    EABVCardControl *vcard_control = data;

    if (type && g_ascii_strcasecmp (type, "text/vCard") != 0 &&     
        g_ascii_strcasecmp (type, "text/x-vCard") != 0) {       
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_Bonobo_Persist_WrongDataType, NULL);
        return;
    }

    if ((vcard = stream_read (stream)) == NULL) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_Bonobo_Persist_FileNotFound, NULL);
        return;
    }

    g_list_foreach (
        vcard_control->card_list,
        (GFunc) g_object_unref, NULL);
    g_list_free (vcard_control->card_list);

    list = eab_contact_list_from_string (vcard);
    g_free(vcard);
    vcard_control->card_list = list;
    if (list) {
        eab_contact_display_render (vcard_control->display, E_CONTACT (list->data),
                        vcard_control->render_mode);
    }
    if (list && list->next) {
        char *message;
        int length = g_list_length (list) - 1;
        message = g_strdup_printf (ngettext("There is one other contact.", 
                            "There are %d other contacts.", length), 
                       length);
        gtk_label_set_text (GTK_LABEL (vcard_control->label), message);
        g_free (message);
        gtk_widget_show (vcard_control->label);
    } else {
        gtk_widget_hide (vcard_control->label);
    }
} /* pstream_load */

/*
 * This function implements the Bonobo::PersistStream:save method.
 */
static void
pstream_save (BonoboPersistStream *ps, const Bonobo_Stream stream,
          Bonobo_Persist_ContentType type, void *data,
          CORBA_Environment *ev)
{
    EABVCardControl *vcard_control = data;
    char             *vcard;
    int               length;

    if (type && g_ascii_strcasecmp (type, "text/vCard") != 0 &&     
        g_ascii_strcasecmp (type, "text/x-vCard") != 0) {       
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_Bonobo_Persist_WrongDataType, NULL);
        return;
    }

    vcard = eab_contact_list_to_string (vcard_control->card_list);
    length = strlen (vcard);
    bonobo_stream_client_write (stream, vcard, length, ev);
    g_free (vcard);
} /* pstream_save */

static Bonobo_Persist_ContentTypeList *
pstream_get_content_types (BonoboPersistStream *ps, void *closure,
               CORBA_Environment *ev)
{
    return bonobo_persist_generate_content_types (2, "text/vCard", "text/x-vCard");
}

static void
book_open_cb (EBook *book, EBookStatus status, gpointer closure)
{
    GList *list = closure;
    if (status == E_BOOK_ERROR_OK) {
        GList *p;
        for (p = list; p; p = p->next) {
            /* XXX argh, more passing of NULL's for callbacks */
            eab_merging_book_add_contact (book, E_CONTACT (p->data), NULL, NULL);
        }
    }
    if (book)
        g_object_unref (book);
    g_list_foreach (list, (GFunc) g_object_unref, NULL);
    g_list_free (list);
}

static void
save_in_addressbook(GtkWidget *button, gpointer data)
{
    EABVCardControl *vcard_control = data;
    GList *list, *p;

    list = g_list_copy (vcard_control->card_list);

    for (p = list; p; p = p->next)
        g_object_ref (p->data);

    addressbook_load_default_book (book_open_cb, list);
}

static void
toggle_full_vcard(GtkWidget *button, gpointer data)
{
    EABVCardControl *vcard_control = data;
    char *label;

    if (!vcard_control->card_list)
        return;

    if (vcard_control->render_mode == EAB_CONTACT_DISPLAY_RENDER_NORMAL) {
        vcard_control->render_mode = EAB_CONTACT_DISPLAY_RENDER_COMPACT;
        label = _("Show Full VCard");
    }
    else {
        vcard_control->render_mode = EAB_CONTACT_DISPLAY_RENDER_NORMAL;
        label = _("Show Compact VCard");
    }

    gtk_button_set_label (GTK_BUTTON (button), label);
    eab_contact_display_render (vcard_control->display, E_CONTACT (vcard_control->card_list->data),
                    vcard_control->render_mode);
}

static void
free_struct (gpointer data, GObject *where_object_was)
{
    EABVCardControl *vcard_control = data;

    g_list_foreach (
        vcard_control->card_list,
        (GFunc) g_object_unref, NULL);
    g_list_free (vcard_control->card_list);
    g_free (vcard_control);
}

BonoboControl *
eab_vcard_control_new (void)
{
    BonoboControl       *control;
    BonoboPersistStream *stream;
    GtkWidget       *display;
    GtkWidget           *button1, *button2;
    GtkWidget           *bbox;
    GtkWidget           *vbox;

    EABVCardControl    *vcard_control = g_new (EABVCardControl, 1);

    printf ("inside eab_vcard_control_new\n");

    vcard_control->card_list = NULL;
    vcard_control->display = NULL;
    vcard_control->label = NULL;

    vcard_control->render_mode = EAB_CONTACT_DISPLAY_RENDER_COMPACT;

    /* Create the control. */

    display = eab_contact_display_new ();
    vcard_control->display = EAB_CONTACT_DISPLAY (display);

    bbox = gtk_hbutton_box_new ();
    gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), GTK_BUTTONBOX_START);
    gtk_box_set_spacing (GTK_BOX (bbox), 12);

    button1 = gtk_button_new_with_label(_("Show Full VCard"));
    g_signal_connect (button1, "clicked",
              G_CALLBACK (toggle_full_vcard), vcard_control);
    gtk_box_pack_start (GTK_BOX (bbox), button1, FALSE, FALSE, 0);

    button2 = gtk_button_new_with_label(_("Save in addressbook"));
    g_signal_connect (button2, "clicked",
              G_CALLBACK (save_in_addressbook), vcard_control);
    gtk_box_pack_start (GTK_BOX (bbox), button2, FALSE, FALSE, 0);

    /* This is intentionally not shown. */
    vcard_control->label = gtk_label_new ("");

    vbox = gtk_vbox_new (FALSE, 0);
    gtk_box_pack_start (GTK_BOX (vbox), bbox, FALSE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (vbox), display, TRUE, TRUE, 0);
    gtk_box_pack_start (GTK_BOX (vbox), vcard_control->label, TRUE, TRUE, 0);
    gtk_widget_show_all (bbox);
    gtk_widget_show (display);
    gtk_widget_show (vbox);

    control = bonobo_control_new (vbox);

    g_object_weak_ref (G_OBJECT (control), free_struct, vcard_control);

    stream = bonobo_persist_stream_new (pstream_load, pstream_save,
                        pstream_get_content_types,
                        VCARD_CONTROL_ID,
                        vcard_control);

    if (stream == NULL) {
        bonobo_object_unref (BONOBO_OBJECT (control));
        return NULL;
    }

    bonobo_object_add_interface (BONOBO_OBJECT (control),
                    BONOBO_OBJECT (stream));

    return control;
}