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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* msg-composer-hdrs.c
 *
 * Copyright (C) 1999 Helix Code, Inc.
 *
 * 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 Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Author: Ettore Perazzoli
 */

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

#include <gnome.h>
#include <camel/camel.h>

#include <bonobo.h>

#include <liboaf/liboaf.h>

#include "Composer.h"

#include "e-msg-composer-hdrs.h"
#include <gal/e-text/e-entry.h>
#include <gal/widgets/e-unicode.h>

#include "mail/mail-config.h"


#define SELECT_NAMES_OAFID "OAFIID:GNOME_Evolution_Addressbook_SelectNames"

struct _EMsgComposerHdrsPrivate {
    GNOME_Evolution_Addressbook_SelectNames corba_select_names;

    /* Total number of headers that we have.  */
    guint num_hdrs;

    /* The tooltips.  */
    GtkTooltips *tooltips;

    /* Standard headers.  */
    GtkWidget *from_entry;
    GtkWidget *to_entry;
    GtkWidget *cc_entry;
    GtkWidget *bcc_entry;
    GtkWidget *subject_entry;
};


static GtkTableClass *parent_class = NULL;

enum {
    SHOW_ADDRESS_DIALOG,
    LAST_SIGNAL
};

enum {
    HEADER_ADDRBOOK,
    HEADER_COMBOBOX,
    HEADER_ENTRYBOX
};

static gint signals[LAST_SIGNAL];


static gboolean
setup_corba (EMsgComposerHdrs *hdrs)
{
    EMsgComposerHdrsPrivate *priv;
    CORBA_Environment ev;

    priv = hdrs->priv;

    g_assert (priv->corba_select_names == CORBA_OBJECT_NIL);

    CORBA_exception_init (&ev);

    priv->corba_select_names = oaf_activate_from_id (SELECT_NAMES_OAFID, 0, NULL, &ev);

    /* OAF seems to be broken -- it can return a CORBA_OBJECT_NIL without
           raising an exception in `ev'.  */
    if (ev._major != CORBA_NO_EXCEPTION || priv->corba_select_names == CORBA_OBJECT_NIL) {
        g_warning ("Cannot activate -- %s", SELECT_NAMES_OAFID);
        CORBA_exception_free (&ev);
        return FALSE;
    }

    CORBA_exception_free (&ev);

    return TRUE;
}


static void
address_button_clicked_cb (GtkButton *button,
               gpointer data)
{
    EMsgComposerHdrs *hdrs;
    EMsgComposerHdrsPrivate *priv;
    CORBA_Environment ev;

    hdrs = E_MSG_COMPOSER_HDRS (data);
    priv = hdrs->priv;

    CORBA_exception_init (&ev);

    /* FIXME: Section ID */
    GNOME_Evolution_Addressbook_SelectNames_activateDialog (priv->corba_select_names, "", &ev);

    CORBA_exception_free (&ev);
}

static GtkWidget *
create_dropdown_entry (EMsgComposerHdrs *hdrs,
               const char *name)
{
    GtkWidget *combo;
    GList *values = NULL;
    
    combo = gtk_combo_new ();
    gtk_combo_set_use_arrows (GTK_COMBO (combo), TRUE);
    gtk_combo_set_case_sensitive (GTK_COMBO (combo), FALSE);
    if (!strcmp (name, _("From:"))) {
        const MailConfigIdentity *id;
        const GSList *accounts, *stmp;
        GList *tmp;
        char *val;
        
        accounts = mail_config_get_accounts ();
        stmp = accounts;
        while (stmp) {
            const MailConfigAccount *account;
            char *address, *addr_local;
            
            account = stmp->data;
            g_assert (account);
            g_assert (account->id);
            g_assert (account->id->name);
            g_assert (account->id->address);
            
            address = camel_internet_address_format_address (account->id->name, account->id->address);
            addr_local = e_utf8_to_gtk_string (combo, address);
            g_free (address);
            values = g_list_append (values, addr_local);
            stmp = stmp->next;
        }
        
        gtk_combo_set_popdown_strings (GTK_COMBO (combo), values);

        tmp = values;
        while (tmp) {
            g_free (tmp->data);
            tmp = tmp->next;
        }
        g_list_free (values);
        
        id = mail_config_get_default_identity ();
        g_assert (id);          
        g_assert (id->name);
        g_assert (id->address);
        
        val = camel_internet_address_format_address (id->name, id->address);
        
        e_utf8_gtk_entry_set_text (GTK_ENTRY (GTK_COMBO (combo)->entry), val);
        g_free (val);
    }
    
    return combo;
}

static GtkWidget *
create_addressbook_entry (EMsgComposerHdrs *hdrs,
              const char *name)
{
    EMsgComposerHdrsPrivate *priv;
    GNOME_Evolution_Addressbook_SelectNames corba_select_names;
    Bonobo_Control corba_control;
    GtkWidget *control_widget;
    CORBA_Environment ev;

    priv = hdrs->priv;
    corba_select_names = priv->corba_select_names;

    CORBA_exception_init (&ev);

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

    corba_control = GNOME_Evolution_Addressbook_SelectNames_getEntryBySection (corba_select_names, name, &ev);

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

    CORBA_exception_free (&ev);

    control_widget = bonobo_widget_new_control_from_objref (corba_control, CORBA_OBJECT_NIL);

    return control_widget;
}

static void
entry_changed (GtkWidget *entry, EMsgComposerHdrs *hdrs)
{
    /* Set the has_changed var to TRUE */
    hdrs->has_changed = TRUE;
}

static GtkWidget *
add_header (EMsgComposerHdrs *hdrs,
        const gchar *name,
        const gchar *tip,
        const gchar *tip_private,
        int type)
{
    EMsgComposerHdrsPrivate *priv;
    GtkWidget *label;
    GtkWidget *entry;
    guint pad;
    
    priv = hdrs->priv;
    
    if (type == HEADER_ADDRBOOK) {
        label = gtk_button_new_with_label (name);
        GTK_OBJECT_UNSET_FLAGS(label, GTK_CAN_FOCUS);
        gtk_signal_connect (GTK_OBJECT (label), "clicked",
                    GTK_SIGNAL_FUNC (address_button_clicked_cb),
                    hdrs);
        pad = 2;
        gtk_tooltips_set_tip (hdrs->priv->tooltips, label,
                      _("Click here for the address book"),
                      NULL);
    } else {
        label = gtk_label_new (name);
        pad = GNOME_PAD;
    }
    
    gtk_table_attach (GTK_TABLE (hdrs), label,
              0, 1, priv->num_hdrs, priv->num_hdrs + 1,
              GTK_FILL, GTK_FILL,
              pad, pad);
    gtk_widget_show (label);
    
    switch (type) {
    case HEADER_ADDRBOOK:
        entry = create_addressbook_entry (hdrs, name);
        break;
    case HEADER_COMBOBOX:
        entry = create_dropdown_entry (hdrs, name);
        break;
    default:
        entry = e_entry_new ();
        gtk_object_set(GTK_OBJECT(entry),
                   "editable", TRUE,
                   "use_ellipsis", TRUE,
                   "allow_newlines", FALSE,
                   NULL);
    }

    if (entry != NULL) {
        gtk_widget_show (entry);
        
        gtk_table_attach (GTK_TABLE (hdrs), entry,
                  1, 2, priv->num_hdrs, priv->num_hdrs + 1,
                  GTK_FILL | GTK_EXPAND, 0,
                  2, 2);
        
        gtk_tooltips_set_tip (hdrs->priv->tooltips, entry, tip, tip_private);
        
        gtk_signal_connect (GTK_OBJECT (entry), "changed",
                    GTK_SIGNAL_FUNC (entry_changed), hdrs);
    }
    
    priv->num_hdrs++;
    
    return entry;
}

static void
setup_headers (EMsgComposerHdrs *hdrs)
{
    EMsgComposerHdrsPrivate *priv;

    priv = hdrs->priv;
    
    priv->from_entry = add_header
        (hdrs, _("From:"), 
         _("Enter the identity you wish to send this message from"),
         NULL,
         HEADER_COMBOBOX);
    priv->to_entry = add_header
        (hdrs, _("To:"), 
         _("Enter the recipients of the message"),
         NULL,
         HEADER_ADDRBOOK);
    priv->cc_entry = add_header
        (hdrs, _("Cc:"),
         _("Enter the addresses that will receive a carbon copy of "
           "the message"),
         NULL,
         HEADER_ADDRBOOK);
    priv->bcc_entry = add_header
        (hdrs, _("Bcc:"),
         _("Enter the addresses that will receive a carbon copy of "
           "the message without appearing in the recipient list of "
           "the message."),
         NULL,
         HEADER_ADDRBOOK);
    priv->subject_entry = add_header
        (hdrs, _("Subject:"),
         _("Enter the subject of the mail"),
         NULL,
         HEADER_ENTRYBOX);
}


/* GtkObject methods.  */

static void
destroy (GtkObject *object)
{
    EMsgComposerHdrs *hdrs;
    EMsgComposerHdrsPrivate *priv;

    hdrs = E_MSG_COMPOSER_HDRS (object);
    priv = hdrs->priv;

    if (priv->corba_select_names != CORBA_OBJECT_NIL) {
        CORBA_Environment ev;

        CORBA_exception_init (&ev);
        CORBA_Object_release (priv->corba_select_names, &ev);
        CORBA_exception_free (&ev);
    }

    gtk_object_destroy (GTK_OBJECT (priv->tooltips));

    if (GTK_OBJECT_CLASS (parent_class)->destroy != NULL)
        (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}


static void
class_init (EMsgComposerHdrsClass *class)
{
    GtkObjectClass *object_class;

    object_class = GTK_OBJECT_CLASS (class);
    object_class->destroy = destroy;

    parent_class = gtk_type_class (gtk_table_get_type ());

    signals[SHOW_ADDRESS_DIALOG] =
        gtk_signal_new ("show_address_dialog",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (EMsgComposerHdrsClass,
                           show_address_dialog),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
}

static void
init (EMsgComposerHdrs *hdrs)
{
    EMsgComposerHdrsPrivate *priv;

    priv = g_new (EMsgComposerHdrsPrivate, 1);

    priv->corba_select_names = CORBA_OBJECT_NIL;

    priv->from_entry    = NULL;
    priv->to_entry      = NULL;
    priv->cc_entry      = NULL;
    priv->bcc_entry     = NULL;
    priv->subject_entry = NULL;

    priv->tooltips = gtk_tooltips_new ();

    priv->num_hdrs = 0;
    
    hdrs->priv = priv;
    
    hdrs->has_changed = FALSE;
}


GtkType
e_msg_composer_hdrs_get_type (void)
{
    static GtkType type = 0;

    if (type == 0) {
        static const GtkTypeInfo info = {
            "EMsgComposerHdrs",
            sizeof (EMsgComposerHdrs),
            sizeof (EMsgComposerHdrsClass),
            (GtkClassInitFunc) class_init,
            (GtkObjectInitFunc) init,
            /* reserved_1 */ NULL,
            /* reserved_2 */ NULL,
            (GtkClassInitFunc) NULL,
        };

        type = gtk_type_unique (gtk_table_get_type (), &info);
    }

    return type;
}

GtkWidget *
e_msg_composer_hdrs_new (void)
{
    EMsgComposerHdrs *new;
    EMsgComposerHdrsPrivate *priv;
    
    new = gtk_type_new (e_msg_composer_hdrs_get_type ());
    priv = new->priv;
    
    if (! setup_corba (new)) {
        gtk_widget_destroy (GTK_WIDGET (new));
        return NULL;
    }
    
    setup_headers (new);

    return GTK_WIDGET (new);
}


static void
set_recipients (CamelMimeMessage *msg, GtkWidget *entry_widget, const gchar *type)
{
    char *s, *u;
    CamelInternetAddress *addr;

    bonobo_widget_get_property (BONOBO_WIDGET (entry_widget), "text", &s, NULL);

    /* FIXME: This is just a temporary workaround, the widget should grok it */
        u = e_utf8_from_gtk_string(entry_widget, s);

    addr = camel_internet_address_new();
    camel_address_unformat((CamelAddress *)addr, u);

    /* TODO: In here, we could cross-reference the names with an alias book
       or address book, it should be sufficient for unformat to do the parsing too */

    camel_mime_message_set_recipients(msg, type, addr);

    camel_object_unref((CamelObject *)addr);
    g_free(s);
    g_free(u);
}

void
e_msg_composer_hdrs_to_message (EMsgComposerHdrs *hdrs,
                CamelMimeMessage *msg)
{
    gchar *subject;
    char *fromstr;
    CamelInternetAddress *from;
    
    g_return_if_fail (hdrs != NULL);
    g_return_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs));
    g_return_if_fail (msg != NULL);
    g_return_if_fail (CAMEL_IS_MIME_MESSAGE (msg));
    
    subject = e_msg_composer_hdrs_get_subject (hdrs);
    camel_mime_message_set_subject (msg, subject);
    g_free (subject);

    /* get_from() should probably return a CamelInternetAddress anyway */
    fromstr = e_msg_composer_hdrs_get_from (hdrs);
    from = camel_internet_address_new();
    camel_address_unformat((CamelAddress *)from, fromstr);
    camel_mime_message_set_from (msg, from);
    camel_object_unref((CamelObject *)from);
    g_free(fromstr);
    
    set_recipients (msg, hdrs->priv->to_entry, CAMEL_RECIPIENT_TYPE_TO);
    set_recipients (msg, hdrs->priv->cc_entry, CAMEL_RECIPIENT_TYPE_CC);
    set_recipients (msg, hdrs->priv->bcc_entry, CAMEL_RECIPIENT_TYPE_BCC);
}


static void
set_entry (BonoboWidget *bonobo_widget,
       const GList *list)
{
    GString *string;
    const GList *p;
    
    string = g_string_new ("");
    for (p = list; p != NULL; p = p->next) {
        if (string->str[0] != '\0')
            g_string_append (string, ", ");
        g_string_append (string, p->data);
    }
    
    bonobo_widget_set_property (BONOBO_WIDGET (bonobo_widget), "text", string->str, NULL);
    
    g_string_free (string, TRUE);
}

void
e_msg_composer_hdrs_set_from (EMsgComposerHdrs *hdrs,
                  const char *from)
{
    GtkEntry *entry;
    
    g_return_if_fail (hdrs != NULL);
    g_return_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs));
    
    entry = GTK_ENTRY (GTK_COMBO (hdrs->priv->from_entry)->entry);
    e_utf8_gtk_entry_set_text (entry, from);
}

void
e_msg_composer_hdrs_set_to (EMsgComposerHdrs *hdrs,
                const GList *to_list)
{
    g_return_if_fail (hdrs != NULL);
    g_return_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs));

    set_entry (BONOBO_WIDGET (hdrs->priv->to_entry), to_list);
}

void
e_msg_composer_hdrs_set_cc (EMsgComposerHdrs *hdrs,
                const GList *cc_list)
{
    g_return_if_fail (hdrs != NULL);
    g_return_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs));

    set_entry (BONOBO_WIDGET (hdrs->priv->cc_entry), cc_list);
}

void
e_msg_composer_hdrs_set_bcc (EMsgComposerHdrs *hdrs,
                 const GList *bcc_list)
{
    g_return_if_fail (hdrs != NULL);
    g_return_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs));

    set_entry (BONOBO_WIDGET (hdrs->priv->bcc_entry), bcc_list);
}

void
e_msg_composer_hdrs_set_subject (EMsgComposerHdrs *hdrs,
                 const char *subject)
{
    g_return_if_fail (hdrs != NULL);
    g_return_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs));
    g_return_if_fail (subject != NULL);

    gtk_object_set (GTK_OBJECT (hdrs->priv->subject_entry),
            "text", subject,
            NULL);
}

/* FIXME: This should probably return a CamelInternetAddress */
char *
e_msg_composer_hdrs_get_from (EMsgComposerHdrs *hdrs)
{
    g_return_val_if_fail (hdrs != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs), NULL);
    
    return e_utf8_gtk_entry_get_text (GTK_ENTRY (GTK_COMBO (hdrs->priv->from_entry)->entry));
}

/* FIXME this is currently unused and broken.  */
GList *
e_msg_composer_hdrs_get_to (EMsgComposerHdrs *hdrs)
{
    g_return_val_if_fail (hdrs != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs), NULL);
    
    g_assert_not_reached ();
    
    return NULL;
}

/* FIXME this is currently unused and broken.  */
GList *
e_msg_composer_hdrs_get_cc (EMsgComposerHdrs *hdrs)
{
    g_return_val_if_fail (hdrs != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs), NULL);
    
    g_assert_not_reached ();
    
    return NULL;
}

/* FIXME this is currently unused and broken.  */
GList *
e_msg_composer_hdrs_get_bcc (EMsgComposerHdrs *hdrs)
{
    g_return_val_if_fail (hdrs != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs), NULL);
    
    g_assert_not_reached ();
    
    return NULL;
}

/* FIXME: This is just changed to return allooc'd mem to be consistant with get_from */
char *
e_msg_composer_hdrs_get_subject (EMsgComposerHdrs *hdrs)
{
    gchar *subject;
    
    g_return_val_if_fail (hdrs != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs), NULL);
    
    gtk_object_get (GTK_OBJECT (hdrs->priv->subject_entry),
            "text", &subject, NULL);
    
    return g_strdup (subject);
}


GtkWidget *
e_msg_composer_hdrs_get_to_entry (EMsgComposerHdrs *hdrs)
{
    g_return_val_if_fail (hdrs != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs), NULL);

    return hdrs->priv->to_entry;
}

GtkWidget *
e_msg_composer_hdrs_get_cc_entry (EMsgComposerHdrs *hdrs)
{
    g_return_val_if_fail (hdrs != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs), NULL);
    
    return hdrs->priv->cc_entry;
}

GtkWidget *
e_msg_composer_hdrs_get_bcc_entry (EMsgComposerHdrs *hdrs)
{
    g_return_val_if_fail (hdrs != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs), NULL);

    return hdrs->priv->bcc_entry;
}

GtkWidget *
e_msg_composer_hdrs_get_subject_entry (EMsgComposerHdrs *hdrs)
{
    g_return_val_if_fail (hdrs != NULL, NULL);
    g_return_val_if_fail (E_IS_MSG_COMPOSER_HDRS (hdrs), NULL);

    return hdrs->priv->subject_entry;
}