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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Jeffrey Stedfast <fejj@ximian.com>
 *
 *  Copyright 2003 Ximian, Inc. (www.ximian.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.
 *
 */


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

#include <string.h>

#include <libgnome/gnome-i18n.h>

#include <gal/util/e-util.h>
#include <gal/widgets/e-gui-utils.h>

#include <gtk/gtkentry.h>
#include <gtk/gtkbox.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkscrolledwindow.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkstock.h>

#include <camel/camel-url.h>
#include <camel/camel-store.h>
#include <camel/camel-session.h>

#include "em-folder-tree.h"
#include "em-folder-selector.h"

#define d(x) x


extern CamelSession *session;


static void em_folder_selector_class_init (EMFolderSelectorClass *klass);
static void em_folder_selector_init (EMFolderSelector *emfs);
static void em_folder_selector_destroy (GtkObject *obj);
static void em_folder_selector_finalize (GObject *obj);


static GtkDialogClass *parent_class = NULL;


GType
em_folder_selector_get_type (void)
{
    static GType type = 0;
    
    if (!type) {
        static const GTypeInfo info = {
            sizeof (EMFolderSelectorClass),
            NULL, /* base_class_init */
            NULL, /* base_class_finalize */
            (GClassInitFunc) em_folder_selector_class_init,
            NULL, /* class_finalize */
            NULL, /* class_data */
            sizeof (EMFolderSelector),
            0,    /* n_preallocs */
            (GInstanceInitFunc) em_folder_selector_init,
        };
        
        type = g_type_register_static (GTK_TYPE_DIALOG, "EMFolderSelector", &info, 0);
    }
    
    return type;
}

static void
em_folder_selector_class_init (EMFolderSelectorClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (klass);
    
    parent_class = g_type_class_ref (GTK_TYPE_DIALOG);
    
    object_class->finalize = em_folder_selector_finalize;
    gtk_object_class->destroy = em_folder_selector_destroy;
}

static void
em_folder_selector_init (EMFolderSelector *emfs)
{
    emfs->selected_path = NULL;
    emfs->selected_uri = NULL;
}

static void
em_folder_selector_destroy (GtkObject *obj)
{
    EMFolderSelector *emfs = (EMFolderSelector *) obj;
    EMFolderTreeModel *model;
    
    if (emfs->created_id != 0) {
        model = em_folder_tree_get_model (emfs->emft);
        g_signal_handler_disconnect (model, emfs->created_id);
        emfs->created_id = 0;
    }
    
    GTK_OBJECT_CLASS (parent_class)->destroy (obj);
}

static void
em_folder_selector_finalize (GObject *obj)
{
    EMFolderSelector *emfs = (EMFolderSelector *) obj;
    
    g_free (emfs->selected_path);
    g_free (emfs->selected_uri);
    g_free (emfs->created_uri);
    
    G_OBJECT_CLASS (parent_class)->finalize (obj);
}

static void
folder_created_cb (EMFolderTreeModel *model, const char *path, const char *uri, EMFolderSelector *emfs)
{
    CamelException ex;
    CamelStore *store;
    
    camel_exception_init (&ex);
    if (!(store = (CamelStore *) camel_session_get_service (session, uri, CAMEL_PROVIDER_STORE, &ex)))
        return;
    
    if (camel_store_folder_uri_equal (store, emfs->created_uri, uri)) {
        em_folder_tree_set_selected (emfs->emft, uri);
        g_signal_handler_disconnect (model, emfs->created_id);
        emfs->created_id = 0;
    }
    
    camel_object_unref (store);
}

static void
emfs_response (GtkWidget *dialog, int response, EMFolderSelector *emfs)
{
    EMFolderTreeModel *model;
    const char *path, *uri;
    EMFolderTree *emft;
    
    if (response != EM_FOLDER_SELECTOR_RESPONSE_NEW)
        return;
    
    model = em_folder_tree_get_model (emfs->emft);
    emft = (EMFolderTree *) em_folder_tree_new_with_model (model);
    dialog = em_folder_selector_create_new (emft, 0, _("Create New Folder"), _("Specify where to create the folder:"));
    gtk_window_set_transient_for ((GtkWindow *) dialog, (GtkWindow *) emfs);
    uri = em_folder_selector_get_selected_uri (emfs);
    em_folder_tree_set_selected (emft, uri);
    
    if (gtk_dialog_run ((GtkDialog *) dialog) == GTK_RESPONSE_OK) {
        uri = em_folder_selector_get_selected_uri ((EMFolderSelector *) dialog);
        path = em_folder_selector_get_selected_path ((EMFolderSelector *) dialog);
        
        g_free (emfs->created_uri);
        emfs->created_uri = g_strdup (uri);
        
        if (emfs->created_id == 0)
            emfs->created_id = g_signal_connect (model, "folder-added", G_CALLBACK (folder_created_cb), emfs);
        
        em_folder_tree_create_folder (emfs->emft, path, uri);
    }
    
    gtk_widget_destroy (dialog);
    
    g_signal_stop_emission_by_name (emfs, "response");
}

static void
emfs_create_name_changed (GtkEntry *entry, EMFolderSelector *emfs)
{
    const char *path, *text = NULL;
    gboolean active;
    
    if (emfs->name_entry->text_length > 0)
        text = gtk_entry_get_text (emfs->name_entry);
    
    path = em_folder_tree_get_selected_path (emfs->emft);
    
    active = text && path && !strchr (text, '/');
    
    gtk_dialog_set_response_sensitive ((GtkDialog *) emfs, GTK_RESPONSE_OK, active);
}

static void
folder_selected_cb (EMFolderTree *emft, const char *path, const char *uri, EMFolderSelector *emfs)
{
    if (emfs->name_entry)
        emfs_create_name_changed (emfs->name_entry, emfs);
    else
        gtk_dialog_set_response_sensitive (GTK_DIALOG (emfs), GTK_RESPONSE_OK, TRUE);
}

static void
folder_activated_cb (EMFolderTree *emft, const char *path, const char *uri, EMFolderSelector *emfs)
{
    gtk_dialog_response ((GtkDialog *) emfs, GTK_RESPONSE_OK);
}

void
em_folder_selector_construct (EMFolderSelector *emfs, EMFolderTree *emft, guint32 flags, const char *title, const char *text)
{
    GtkWidget *label;
    
    gtk_window_set_default_size (GTK_WINDOW (emfs), 350, 300);
    gtk_window_set_title (GTK_WINDOW (emfs), title);
    gtk_container_set_border_width (GTK_CONTAINER (emfs), 6);
    
    gtk_box_set_spacing (GTK_BOX (GTK_DIALOG (emfs)->vbox), 6);
    gtk_container_set_border_width (GTK_CONTAINER (GTK_DIALOG (emfs)->vbox), 6);
    
    emfs->flags = flags;
    if (flags & EM_FOLDER_SELECTOR_CAN_CREATE) {
        gtk_dialog_add_button (GTK_DIALOG (emfs), GTK_STOCK_NEW, EM_FOLDER_SELECTOR_RESPONSE_NEW);
        g_signal_connect (emfs, "response", G_CALLBACK (emfs_response), emfs);
    }
    
    gtk_dialog_add_buttons (GTK_DIALOG (emfs), GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                GTK_STOCK_OK, GTK_RESPONSE_OK, NULL);
    
    gtk_dialog_set_response_sensitive (GTK_DIALOG (emfs), GTK_RESPONSE_OK, FALSE);
    gtk_dialog_set_default_response (GTK_DIALOG (emfs), GTK_RESPONSE_OK);
    
    emfs->emft = emft;
    gtk_widget_show ((GtkWidget *) emft);
    
    g_signal_connect (emfs->emft, "folder-selected", G_CALLBACK (folder_selected_cb), emfs);
    g_signal_connect (emfs->emft, "folder-activated", G_CALLBACK (folder_activated_cb), emfs);
    gtk_box_pack_end (GTK_BOX (GTK_DIALOG (emfs)->vbox), (GtkWidget *)emft, TRUE, TRUE, 6);
    
    if (text != NULL) {
        label = gtk_label_new (text);
        gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT); 
        gtk_widget_show (label);
        
        gtk_box_pack_end (GTK_BOX (GTK_DIALOG (emfs)->vbox), label, FALSE, TRUE, 6);
    }
    
    gtk_widget_grab_focus ((GtkWidget *) emfs->emft);
}

GtkWidget *
em_folder_selector_new (EMFolderTree *emft, guint32 flags, const char *title, const char *text)
{
    EMFolderSelector *emfs;
    
    emfs = g_object_new (em_folder_selector_get_type (), NULL);
    em_folder_selector_construct (emfs, emft, flags, title, text);
    
    return (GtkWidget *) emfs;
}


static void
emfs_create_name_activate (GtkEntry *entry, EMFolderSelector *emfs)
{
    if (emfs->name_entry->text_length > 0) {
        const char *path, *text;
        
        text = gtk_entry_get_text (emfs->name_entry);
        path = em_folder_tree_get_selected_path (emfs->emft);
        
        if (text && path && !strchr (text, '/'))
            g_signal_emit_by_name (emfs, "response", GTK_RESPONSE_OK);
    }
}

GtkWidget *
em_folder_selector_create_new (EMFolderTree *emft, guint32 flags, const char *title, const char *text)
{
    EMFolderSelector *emfs;
    GtkWidget *hbox, *w;
    
    /* remove the CREATE flag if it is there since that's the
     * whole purpose of this dialog */
    flags &= ~EM_FOLDER_SELECTOR_CAN_CREATE;
    
    emfs = g_object_new (em_folder_selector_get_type (), NULL);
    em_folder_selector_construct (emfs, emft, flags, title, text);
    em_folder_tree_set_excluded(emft, EMFT_EXCLUDE_NOINFERIORS);
    
    hbox = gtk_hbox_new (FALSE, 0);
    w = gtk_label_new_with_mnemonic (_("Folder _name:"));
    gtk_box_pack_start ((GtkBox *) hbox, w, FALSE, FALSE, 6);
    emfs->name_entry = (GtkEntry *) gtk_entry_new ();
    gtk_label_set_mnemonic_widget (GTK_LABEL (w), (GtkWidget *) emfs->name_entry);
    g_signal_connect (emfs->name_entry, "changed", G_CALLBACK (emfs_create_name_changed), emfs);
    g_signal_connect (emfs->name_entry, "activate", G_CALLBACK (emfs_create_name_activate), emfs);
    gtk_box_pack_start ((GtkBox *) hbox, (GtkWidget *) emfs->name_entry, TRUE, FALSE, 6);
    gtk_widget_show_all (hbox);
    
    gtk_box_pack_start ((GtkBox *) ((GtkDialog *) emfs)->vbox, hbox, FALSE, TRUE, 0);
    
    gtk_widget_grab_focus ((GtkWidget *) emfs->name_entry);
    
    return (GtkWidget *) emfs;
}


void
em_folder_selector_set_selected (EMFolderSelector *emfs, const char *uri)
{
    em_folder_tree_set_selected (emfs->emft, uri);
}

void
em_folder_selector_set_selected_list (EMFolderSelector *emfs, GList *list)
{
    em_folder_tree_set_selected_list (emfs->emft, list);
}

const char *
em_folder_selector_get_selected_uri (EMFolderSelector *emfs)
{
    const char *uri, *name;
    
    if (!(uri = em_folder_tree_get_selected_uri (emfs->emft))) {
        d(printf ("no selected folder?\n"));
        return NULL;
    }
    
    if (uri && emfs->name_entry) {
        CamelProvider *provider;
        CamelURL *url;
        char *newpath;
        
        provider = camel_provider_get(uri, NULL);
        
        name = gtk_entry_get_text (emfs->name_entry);
        
        url = camel_url_new (uri, NULL);
        if (provider && (provider->url_flags & CAMEL_URL_FRAGMENT_IS_PATH)) {
            if (url->fragment)
                newpath = g_strdup_printf ("%s/%s", url->fragment, name);
            else
                newpath = g_strdup (name);
            
            camel_url_set_fragment (url, newpath);
        } else {
            newpath = g_strdup_printf("%s/%s", (url->path == NULL || strcmp(url->path, "/") == 0) ? "":url->path, name);
            camel_url_set_path(url, newpath);
        }
        
        g_free (emfs->selected_path);
        emfs->selected_path = newpath;
        
        g_free (emfs->selected_uri);
        emfs->selected_uri = camel_url_to_string (url, 0);
        
        camel_url_free (url);
        uri = emfs->selected_uri;
    }
    
    return uri;
}

GList *
em_folder_selector_get_selected_uris (EMFolderSelector *emfs)
{
    return em_folder_tree_get_selected_uris (emfs->emft);
}

GList *
em_folder_selector_get_selected_paths (EMFolderSelector *emfs)
{
    return em_folder_tree_get_selected_paths (emfs->emft);
}

const char *
em_folder_selector_get_selected_path (EMFolderSelector *emfs)
{
    const char *path;
    
    if (emfs->selected_path) {
        /* already did the work in a previous call */
        return emfs->selected_path;
    }
    
    if (!(path = em_folder_tree_get_selected_path (emfs->emft))) {
        d(printf ("no selected folder?\n"));
        return NULL;
    }
    
    if (path && emfs->name_entry) {
        const char *name;
        char *newpath;
        
        name = gtk_entry_get_text (emfs->name_entry);
        if (strcmp (path, "/") != 0)
            newpath = g_strdup_printf ("%s/%s", path, name);
        else
            newpath = g_strdup_printf ("/%s", name);
        
        path = emfs->selected_path = newpath;
    }
    
    return path;
}