path: root/calendar/gui/dialogs/comp-editor.c

/* Evolution calendar - Framework for a calendar component editor dialog
 *
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Author: Federico Mena-Quintero <federico@ximian.com>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

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

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <glib.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtkstock.h>
#include <libgnome/gnome-i18n.h>
#include <libgnomeui/gnome-uidefs.h>
#include <libgnomeui/gnome-dialog.h>
#include <libgnomeui/gnome-dialog-util.h>
#include <libgnomeui/gnome-messagebox.h>
#include <e-util/e-dialog-utils.h>
#include <e-util/e-icon-factory.h>
#include <evolution-shell-component-utils.h>
#include "../print.h"
#include "../comp-util.h"
#include "save-comp.h"
#include "delete-comp.h"
#include "send-comp.h"
#include "changed-comp.h"
#include "cancel-comp.h"
#include "recur-comp.h"
#include "comp-editor.h"



/* Private part of the CompEditor structure */
struct _CompEditorPrivate {
    /* Client to use */
    ECal *client;
    
    /* Source client (where comp lives currently) */
    ECal *source_client;

    /* View to listen for changes */
    ECalView *view;

    /* Calendar object/uid we are editing; this is an internal copy */
    ECalComponent *comp;

    /* The pages we have */
    GList *pages;

    /* Notebook to hold the pages */
    GtkNotebook *notebook;
    
    gboolean changed;
    gboolean needs_send;

    CalObjModType mod;
    
    gboolean existing_org;
    gboolean user_org;
    
    gboolean warned;
};



static void comp_editor_class_init (CompEditorClass *class);
static void comp_editor_init (CompEditor *editor);
static gint comp_editor_key_press_event (GtkWidget *d, GdkEventKey *e);
static void comp_editor_finalize (GObject *object);

static void real_set_e_cal (CompEditor *editor, ECal *client);
static void real_edit_comp (CompEditor *editor, ECalComponent *comp);
static gboolean real_send_comp (CompEditor *editor, ECalComponentItipMethod method);
static gboolean prompt_to_save_changes (CompEditor *editor, gboolean send);
static void delete_comp (CompEditor *editor);
static void close_dialog (CompEditor *editor);

static void page_changed_cb (GtkObject *obj, gpointer data);
static void needs_send_cb (GtkObject *obj, gpointer data);
static void page_summary_changed_cb (GtkObject *obj, const char *summary, gpointer data);
static void page_dates_changed_cb (GtkObject *obj, CompEditorPageDates *dates, gpointer data);

static void obj_modified_cb (ECal *client, GList *objs, gpointer data);
static void obj_removed_cb (ECal *client, GList *uids, gpointer data);

static GtkObjectClass *parent_class;



E_MAKE_TYPE (comp_editor, "CompEditor", CompEditor, comp_editor_class_init, comp_editor_init,
         GTK_TYPE_DIALOG);

/* Class initialization function for the calendar component editor */
static void
comp_editor_class_init (CompEditorClass *klass)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;

    parent_class = g_type_class_peek_parent (klass);
    object_class = G_OBJECT_CLASS (klass);
    widget_class = GTK_WIDGET_CLASS (klass);

    klass->set_e_cal = real_set_e_cal;
    klass->edit_comp = real_edit_comp;
    klass->send_comp = real_send_comp;

    widget_class->key_press_event = comp_editor_key_press_event;
    object_class->finalize = comp_editor_finalize;
}

static void
listen_for_changes (CompEditor *editor)
{
    CompEditorPrivate *priv;
    const char *uid = NULL;

    priv = editor->priv;

    /* Discard change listener */
    if (priv->view) {
        g_signal_handlers_disconnect_matched (G_OBJECT (priv->view),
                              G_SIGNAL_MATCH_DATA,
                              0, 0, NULL, NULL,
                              editor);
                
        g_object_unref (priv->view);
        priv->view = NULL;
    }
    
    /* Listen for changes */
    if (priv->comp)
        e_cal_component_get_uid (priv->comp, &uid);

    if (uid) {
        char *query;
        
        query = g_strdup_printf ("(uid? \"%s\")", uid);
        e_cal_get_query (priv->source_client, query, &priv->view, NULL);
        g_free (query);
    }
    
    if (priv->view) {
        g_signal_connect (priv->view, "objects_modified",
                  G_CALLBACK (obj_modified_cb), editor);

        g_signal_connect((priv->view), "objects_removed",
                 G_CALLBACK (obj_removed_cb), editor);

        e_cal_view_start (priv->view);
    }
}

/* This sets the focus to the toplevel, so any field being edited is committed.
   FIXME: In future we may also want to check some of the fields are valid,
   e.g. the EDateEdit fields. */
static void
commit_all_fields (CompEditor *editor)
{
    CompEditorPrivate *priv;

    priv = editor->priv;

    gtk_window_set_focus (GTK_WINDOW (editor), NULL);
}

static void
send_timezone (gpointer key, gpointer value, gpointer user_data)
{
    icaltimezone *zone = value;
    CompEditor *editor = user_data;

    e_cal_add_timezone (editor->priv->client, zone, NULL);
}

static gboolean
save_comp (CompEditor *editor)
{
    CompEditorPrivate *priv;
    ECalComponent *clone;
    GList *l;
    gboolean result;
    GError *error = NULL;
    GHashTable *timezones;
    const char *orig_uid;

    priv = editor->priv;

    if (!priv->changed)
        return TRUE;

    /* Stop listening because we are about to change things */
    if (priv->view) {
        g_signal_handlers_disconnect_matched (G_OBJECT (priv->view),
                              G_SIGNAL_MATCH_DATA,
                              0, 0, NULL, NULL,
                              editor);

        g_object_unref (priv->view);
        priv->view = NULL;
    }

    /* Update on the server */
    timezones = g_hash_table_new (g_str_hash, g_str_equal);

    clone = e_cal_component_clone (priv->comp);
    for (l = priv->pages; l != NULL; l = l->next) {
        if (!comp_editor_page_fill_component (l->data, clone)) {
            g_object_unref (clone);
            g_hash_table_destroy (timezones);
            comp_editor_show_page (editor, COMP_EDITOR_PAGE (l->data));
            return FALSE;
        }

        /* retrieve all timezones */
        comp_editor_page_fill_timezones (l->data, timezones);
    }
    
    /* If we are not the organizer, we don't update the sequence number */
    if (!e_cal_component_has_organizer (clone) || itip_organizer_is_user (clone, priv->client))
        e_cal_component_commit_sequence (clone);
    else
        e_cal_component_abort_sequence (clone);

    g_object_unref (priv->comp);
    priv->comp = clone;

    e_cal_component_get_uid (priv->comp, &orig_uid);

    /* send timezones */
    g_hash_table_foreach (timezones, (GHFunc) send_timezone, editor);
    g_hash_table_destroy (timezones);

    /* send the component to the server */
    if (!cal_comp_is_on_server (priv->comp, priv->client)) {
        result = e_cal_create_object (priv->client, e_cal_component_get_icalcomponent (priv->comp), NULL, &error);
    } else {
        result = e_cal_modify_object (priv->client, e_cal_component_get_icalcomponent (priv->comp), priv->mod, &error);
    }

    if (!result) {
        GtkWidget *dlg;
        char *msg;

        msg = g_strdup (error ? error->message : _("Could not update object"));

        dlg = gnome_error_dialog (msg);
        gnome_dialog_run_and_close (GNOME_DIALOG (dlg));

        g_free (msg);
        if (error)
            g_error_free (error);

        return FALSE;
    } else {
        if (priv->source_client &&
            !e_source_equal (e_cal_get_source (priv->client),
                     e_cal_get_source (priv->source_client)) &&
            cal_comp_is_on_server (priv->comp, priv->source_client)) {
            /* Comp found a new home. Remove it from old one. */
            e_cal_remove_object (priv->source_client, orig_uid, NULL);

            /* Let priv->source_client point to new home, so we can move it
             * again this session. */
            g_object_unref (priv->source_client);
            priv->source_client = g_object_ref (priv->client);
            
            listen_for_changes (editor);
        }

        priv->changed = FALSE;
    }

    return TRUE;
}

static gboolean
save_comp_with_send (CompEditor *editor)
{
    CompEditorPrivate *priv;
    gboolean send;

    priv = editor->priv;

    send = priv->changed && priv->needs_send;

    if (!save_comp (editor))
        return FALSE;

    if (send && send_component_dialog ((GtkWindow *) editor, priv->client, priv->comp, !priv->existing_org)) {
        if (itip_organizer_is_user (priv->comp, priv->client))
            return comp_editor_send_comp (editor, E_CAL_COMPONENT_METHOD_REQUEST);
        else
            return comp_editor_send_comp (editor, E_CAL_COMPONENT_METHOD_REPLY);
    }

    return TRUE;
}

static gboolean
prompt_to_save_changes (CompEditor *editor, gboolean send)
{
    CompEditorPrivate *priv;
    gboolean read_only;

    priv = editor->priv;

    if (!priv->changed)
        return TRUE;

    if (!e_cal_is_read_only (priv->client, &read_only, NULL) || read_only)
        return TRUE;

    switch (save_component_dialog (GTK_WINDOW (editor))) {
    case GTK_RESPONSE_YES: /* Save */
        if (e_cal_component_is_instance (priv->comp))
            if (!recur_component_dialog (priv->client, priv->comp, &priv->mod, GTK_WINDOW (editor)))
                return FALSE;

        if (send && save_comp_with_send (editor))
            return TRUE;
        else if (!send && save_comp (editor))
            return TRUE;
        else
            return FALSE;
    case GTK_RESPONSE_NO: /* Discard */
        return TRUE;
    case GTK_RESPONSE_CANCEL: /* Cancel */
    default:
        return FALSE;
    }
}

static void
response_cb (GtkWidget *widget, int response, gpointer data)
{
    CompEditor *editor = COMP_EDITOR (data);
    CompEditorPrivate *priv;
    
    priv = editor->priv;
    
    switch (response) {
    case GTK_RESPONSE_OK:
        commit_all_fields (editor);
        
        if (e_cal_component_is_instance (priv->comp))
            if (!recur_component_dialog (priv->client, priv->comp, &priv->mod, GTK_WINDOW (editor)))
                return;
        
        if (save_comp_with_send (editor))
            close_dialog (editor);
        break;
    case GTK_RESPONSE_CANCEL:
    case GTK_RESPONSE_DELETE_EVENT:
        commit_all_fields (editor);
        
        if (prompt_to_save_changes (editor, TRUE))
            close_dialog (editor);
        break;
    }
}

/* Creates the basic in the editor */
static void
setup_widgets (CompEditor *editor)
{
    CompEditorPrivate *priv;
    GtkWidget *vbox;

    priv = editor->priv;

    /* Basic vbox */
    vbox = gtk_vbox_new (FALSE, GNOME_PAD_SMALL);
    gtk_widget_show (vbox);
    gtk_container_set_border_width (GTK_CONTAINER (vbox), GNOME_PAD_SMALL);
    gtk_box_pack_start (GTK_BOX (GTK_DIALOG (editor)->vbox), vbox,
                TRUE, TRUE, 6);

    /* Notebook */
    priv->notebook = GTK_NOTEBOOK (gtk_notebook_new ());
    gtk_widget_show (GTK_WIDGET (priv->notebook));
    gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (priv->notebook),
                TRUE, TRUE, 6);

    /* Buttons */
    gtk_dialog_add_button  (GTK_DIALOG (editor), GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL);
    gtk_dialog_add_button  (GTK_DIALOG (editor), GTK_STOCK_OK, GTK_RESPONSE_OK);
    gtk_dialog_set_response_sensitive (GTK_DIALOG (editor), GTK_RESPONSE_OK, FALSE);

    g_signal_connect (editor, "response", G_CALLBACK (response_cb), editor);
}

/* Object initialization function for the calendar component editor */
static void
comp_editor_init (CompEditor *editor)
{
    CompEditorPrivate *priv;

    priv = g_new0 (CompEditorPrivate, 1);
    editor->priv = priv;

    setup_widgets (editor);

    priv->pages = NULL;
    priv->changed = FALSE;
    priv->needs_send = FALSE;
    priv->mod = CALOBJ_MOD_ALL;
    priv->existing_org = FALSE;
    priv->user_org = FALSE;
    priv->warned = FALSE;

    gtk_window_set_type_hint (GTK_WINDOW (editor), GDK_WINDOW_TYPE_HINT_NORMAL);
}


static gint
comp_editor_key_press_event (GtkWidget *d, GdkEventKey *e)
{
#if 0
    if (e->keyval == GDK_Escape) {
        if (prompt_to_save_changes (COMP_EDITOR (d), TRUE))
            close_dialog (COMP_EDITOR (d));
        return TRUE;
    }
#endif

    if (GTK_WIDGET_CLASS (parent_class)->key_press_event)
        return (* GTK_WIDGET_CLASS (parent_class)->key_press_event) (d, e);

    return FALSE;
}

/* Destroy handler for the calendar component editor */
static void
comp_editor_finalize (GObject *object)
{
    CompEditor *editor;
    CompEditorPrivate *priv;
    GList *l;

    editor = COMP_EDITOR (object);
    priv = editor->priv;

    if (priv->client) {
        g_object_unref (priv->client);
        priv->client = NULL;
    }
    
    if (priv->source_client) {
        g_object_unref (priv->source_client);
        priv->source_client = NULL;
    }

    if (priv->view) {
        g_signal_handlers_disconnect_matched (G_OBJECT (priv->view),
                              G_SIGNAL_MATCH_DATA,
                              0, 0, NULL, NULL,
                              editor);

        g_object_unref (priv->view);
        priv->view = NULL;
    }

    /* We want to destroy the pages after the widgets get destroyed,
       since they have lots of signal handlers connected to the widgets
       with the pages as the data. */
    for (l = priv->pages; l != NULL; l = l->next)
        g_object_unref (l->data);

    if (priv->comp) {
        g_object_unref (priv->comp);
        priv->comp = NULL;
    }

    g_free (priv);
    editor->priv = NULL;

    if (G_OBJECT_CLASS (parent_class)->finalize)
        (* G_OBJECT_CLASS (parent_class)->finalize) (object);
}


static void
delete_comp (CompEditor *editor)
{
    CompEditorPrivate *priv;
    const char *uid;

    priv = editor->priv;

    e_cal_component_get_uid (priv->comp, &uid);
    e_cal_remove_object (priv->client, uid, NULL);
    close_dialog (editor);
}

/* Closes the dialog box and emits the appropriate signals */
static void
close_dialog (CompEditor *editor)
{
    CompEditorPrivate *priv;

    priv = editor->priv;

    /* FIXME Unfortunately we do this here because otherwise corba
       calls happen during destruction and we might get a change
       notification back when we are in an inconsistent state */
    if (priv->view)
        g_signal_handlers_disconnect_matched (G_OBJECT (priv->view),
                              G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, editor); 
    
    gtk_widget_destroy (GTK_WIDGET (editor));
}



void
comp_editor_set_existing_org (CompEditor *editor, gboolean existing_org)
{
    CompEditorPrivate *priv;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));

    priv = editor->priv;

    priv->existing_org = existing_org;
}

gboolean
comp_editor_get_existing_org (CompEditor *editor)
{
    CompEditorPrivate *priv;

    g_return_val_if_fail (editor != NULL, FALSE);
    g_return_val_if_fail (IS_COMP_EDITOR (editor), FALSE);

    priv = editor->priv;

    return priv->existing_org;
}

void
comp_editor_set_user_org (CompEditor *editor, gboolean user_org)
{
    CompEditorPrivate *priv;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));

    priv = editor->priv;

    priv->user_org = user_org;
}

gboolean
comp_editor_get_user_org (CompEditor *editor)
{
    CompEditorPrivate *priv;

    g_return_val_if_fail (editor != NULL, FALSE);
    g_return_val_if_fail (IS_COMP_EDITOR (editor), FALSE);

    priv = editor->priv;

    return priv->user_org;
}


/**
 * comp_editor_set_changed:
 * @editor: A component editor
 * @changed: Value to set the changed state to
 *
 * Set the dialog changed state to the given value
 **/
void
comp_editor_set_changed (CompEditor *editor, gboolean changed)
{
    CompEditorPrivate *priv;

    priv = editor->priv;

    priv->changed = changed;

    gtk_dialog_set_response_sensitive (GTK_DIALOG (editor), GTK_RESPONSE_OK, changed);
    gtk_dialog_set_default_response (GTK_DIALOG (editor), GTK_RESPONSE_OK);
}

/**
 * comp_editor_get_changed:
 * @editor: A component editor
 *
 * Gets the changed state of the dialog
 *
 * Return value: A boolean indicating if the dialog is in a changed
 * state
 **/
gboolean
comp_editor_get_changed (CompEditor *editor)
{
    CompEditorPrivate *priv;

    priv = editor->priv;

    return priv->changed;
}

/**
 * comp_editor_set_needs_send:
 * @editor: A component editor
 * @needs_send: Value to set the needs send state to
 *
 * Set the dialog needs send state to the given value
 **/
void
comp_editor_set_needs_send (CompEditor *editor, gboolean needs_send)
{
    CompEditorPrivate *priv;

    priv = editor->priv;

    priv->needs_send = needs_send;
}

/**
 * comp_editor_get_needs_send:
 * @editor: A component editor
 *
 * Gets the needs send state of the dialog
 *
 * Return value: A boolean indicating if the dialog is in a needs send
 * state
 **/
gboolean
comp_editor_get_needs_send (CompEditor *editor)
{
    CompEditorPrivate *priv;

    priv = editor->priv;

    return priv->needs_send;
}

static void page_mapped_cb (GtkWidget *page_widget,
                CompEditorPage *page)
{
    GtkWidget *toplevel;

    toplevel = gtk_widget_get_toplevel (page_widget);
    if (!GTK_IS_WINDOW (toplevel))
        return;

    if (page->accel_group) {
        gtk_window_add_accel_group (GTK_WINDOW (toplevel),
                        page->accel_group);
    }
}

static void page_unmapped_cb (GtkWidget *page_widget,
                  CompEditorPage *page)
{
    GtkWidget *toplevel;

    toplevel = gtk_widget_get_toplevel (page_widget);
    if (!GTK_IS_WINDOW (toplevel))
        return;

    if (page->accel_group) {
        gtk_window_remove_accel_group (GTK_WINDOW (toplevel),
                           page->accel_group);
    }
}

/**
 * comp_editor_append_page:
 * @editor: A component editor
 * @page: A component editor page
 * @label: Label of the page
 *
 * Appends a page to the editor notebook with the given label
 **/
void
comp_editor_append_page (CompEditor *editor,
             CompEditorPage *page,
             const char *label)
{
    CompEditorPrivate *priv;
    GtkWidget *page_widget;
    GtkWidget *label_widget;
    gboolean is_first_page;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));
    g_return_if_fail (page != NULL);
    g_return_if_fail (IS_COMP_EDITOR_PAGE (page));
    g_return_if_fail (label != NULL);

    priv = editor->priv;

    g_object_ref (page);

    /* If we are editing something, fill the widgets with current info */
    if (priv->comp != NULL) {
        ECalComponent *comp;

        comp = comp_editor_get_current_comp (editor);
        comp_editor_page_fill_widgets (page, comp);
        g_object_unref (comp);
    }

    page_widget = comp_editor_page_get_widget (page);
    g_assert (page_widget != NULL);

    label_widget = gtk_label_new (label);

    is_first_page = (priv->pages == NULL);

    priv->pages = g_list_append (priv->pages, page);
    gtk_notebook_append_page (priv->notebook, page_widget, label_widget);

    /* Listen for things happening on the page */
    g_signal_connect(page, "changed",
                G_CALLBACK (page_changed_cb), editor);
    g_signal_connect(page, "needs_send",
                G_CALLBACK (needs_send_cb), editor);
    g_signal_connect(page, "summary_changed",
                G_CALLBACK (page_summary_changed_cb), editor);
    g_signal_connect(page, "dates_changed",
                G_CALLBACK (page_dates_changed_cb), editor);

    /* Listen for when the page is mapped/unmapped so we can
       install/uninstall the appropriate GtkAccelGroup. */
    g_signal_connect((page_widget), "map",
                G_CALLBACK (page_mapped_cb), page);
    g_signal_connect((page_widget), "unmap",
                G_CALLBACK (page_unmapped_cb), page);

    /* The first page is the main page of the editor, so we ask it to focus
     * its main widget.
     */
    if (is_first_page)
        comp_editor_page_focus_main_widget (page);
}

/**
 * comp_editor_remove_page:
 * @editor: A component editor
 * @page: A component editor page
 *
 * Removes the page from the component editor
 **/
void
comp_editor_remove_page (CompEditor *editor, CompEditorPage *page)
{
    CompEditorPrivate *priv;
    GtkWidget *page_widget;
    gint page_num;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));
    g_return_if_fail (page != NULL);
    g_return_if_fail (IS_COMP_EDITOR_PAGE (page));

    priv = editor->priv;

    page_widget = comp_editor_page_get_widget (page);
    page_num = gtk_notebook_page_num (priv->notebook, page_widget);
    if (page_num == -1)
        return;
    
    /* Disconnect all the signals added in append_page(). */
    g_signal_handlers_disconnect_matched (page, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, editor);
    g_signal_handlers_disconnect_matched (page_widget, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, page);

    gtk_notebook_remove_page (priv->notebook, page_num);

    priv->pages = g_list_remove (priv->pages, page);
    g_object_unref (page);
}

/**
 * comp_editor_show_page:
 * @editor:
 * @page:
 *
 *
 **/
void
comp_editor_show_page (CompEditor *editor, CompEditorPage *page)
{
    CompEditorPrivate *priv;
    GtkWidget *page_widget;
    gint page_num;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));
    g_return_if_fail (page != NULL);
    g_return_if_fail (IS_COMP_EDITOR_PAGE (page));

    priv = editor->priv;

    page_widget = comp_editor_page_get_widget (page);
    page_num = gtk_notebook_page_num (priv->notebook, page_widget);
    gtk_notebook_set_page (priv->notebook, page_num);
}

/**
 * comp_editor_set_e_cal:
 * @editor: A component editor
 * @client: The calendar client to use
 *
 * Sets the calendar client used by the editor to update components
 **/
void
comp_editor_set_e_cal (CompEditor *editor, ECal *client)
{
    CompEditorClass *klass;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));

    klass = COMP_EDITOR_CLASS (G_OBJECT_GET_CLASS (editor));

    if (klass->set_e_cal)
        klass->set_e_cal (editor, client);
}

/**
 * comp_editor_get_e_cal:
 * @editor: A component editor
 *
 * Returns the calendar client of the editor
 *
 * Return value: The calendar client of the editor
 **/
ECal *
comp_editor_get_e_cal (CompEditor *editor)
{
    CompEditorPrivate *priv;

    g_return_val_if_fail (editor != NULL, NULL);
    g_return_val_if_fail (IS_COMP_EDITOR (editor), NULL);

    priv = editor->priv;

    return priv->client;
}

/* Creates an appropriate title for the event editor dialog */
static char *
make_title_from_comp (ECalComponent *comp)
{
    char *title;
    const char *type_string;
    ECalComponentVType type;
    ECalComponentText text;

    if (!comp)
        return g_strdup (_("Edit Appointment"));

    type = e_cal_component_get_vtype (comp);
    switch (type) {
    case E_CAL_COMPONENT_EVENT:
        type_string = _("Appointment - %s");
        break;
    case E_CAL_COMPONENT_TODO:
        type_string = _("Task - %s");
        break;
    case E_CAL_COMPONENT_JOURNAL:
        type_string = _("Journal entry - %s");
        break;
    default:
        g_message ("make_title_from_comp(): Cannot handle object of type %d", type);
        return NULL;
    }

    e_cal_component_get_summary (comp, &text);
    if (text.value) {
        title = g_strdup_printf (type_string, text.value);
    } else {
        title = g_strdup_printf (type_string, _("No summary"));
    }

    return title;
}

/* Creates an appropriate title for the event editor dialog */
static char *
make_title_from_string (ECalComponent *comp, const char *str)
{
    char *title;
    const char *type_string;
    ECalComponentVType type;

    if (!comp)
        return g_strdup (_("Edit Appointment"));

    type = e_cal_component_get_vtype (comp);
    switch (type) {
    case E_CAL_COMPONENT_EVENT:
        type_string = _("Appointment - %s");
        break;
    case E_CAL_COMPONENT_TODO:
        type_string = _("Task - %s");
        break;
    case E_CAL_COMPONENT_JOURNAL:
        type_string = _("Journal entry - %s");
        break;
    default:
        g_message ("make_title_from_string(): Cannot handle object of type %d", type);
        return NULL;
    }

    if (str) {
        title = g_strdup_printf (type_string, str);
    } else {
        title = g_strdup_printf (type_string, _("No summary"));
    }

    return title;
}

static const char *
make_icon_from_comp (ECalComponent *comp)
{
    ECalComponentVType type;

    if (!comp)
        return "stock_calendar";

    type = e_cal_component_get_vtype (comp);
    switch (type) {
    case E_CAL_COMPONENT_EVENT:
        return "stock_new-appointment";
        break;
    case E_CAL_COMPONENT_TODO:
        return "stock_task";
        break;
    default:
        return "stock_calendar";
    }
}

/* Sets the event editor's window title from a calendar component */
static void
set_title_from_comp (CompEditor *editor)
{
    CompEditorPrivate *priv;
    char *title;

    priv = editor->priv;
    title = make_title_from_comp (priv->comp);
    gtk_window_set_title (GTK_WINDOW (editor), title);
    g_free (title);
}

static void
set_title_from_string (CompEditor *editor, const char *str)
{
    CompEditorPrivate *priv;
    char *title;

    priv = editor->priv;
    title = make_title_from_string (priv->comp, str);
    gtk_window_set_title (GTK_WINDOW (editor), title);
    g_free (title);
}

static void
set_icon_from_comp (CompEditor *editor)
{
    CompEditorPrivate *priv;
    const char *icon_name;
    GList *icon_list;

    priv = editor->priv;
    icon_name = make_icon_from_comp (priv->comp);

    icon_list = e_icon_factory_get_icon_list (icon_name);
    if (icon_list) {
        gtk_window_set_icon_list (GTK_WINDOW (editor), icon_list);
        g_list_foreach (icon_list, (GFunc) g_object_unref, NULL);
        g_list_free (icon_list);
    }
}

static void
fill_widgets (CompEditor *editor)
{
    CompEditorPrivate *priv;
    GList *l;

    priv = editor->priv;

    for (l = priv->pages; l != NULL; l = l->next)
        comp_editor_page_fill_widgets (l->data, priv->comp);
}

static void
real_set_e_cal (CompEditor *editor, ECal *client)
{
    CompEditorPrivate *priv;
    GList *elem;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));

    priv = editor->priv;

    if (client == priv->client)
        return;

    if (client) {
        g_return_if_fail (E_IS_CAL (client));
        g_return_if_fail (e_cal_get_load_state (client) ==
                  E_CAL_LOAD_LOADED);
        g_object_ref (client);
    }

    if (priv->client)
        g_object_unref (priv->client);

    priv->client = client;
    if (!priv->source_client)
        priv->source_client = g_object_ref (client);

    /* Pass the client to any pages that need it. */
    for (elem = priv->pages; elem; elem = elem->next)
        comp_editor_page_set_e_cal (elem->data, client);
}

static void
real_edit_comp (CompEditor *editor, ECalComponent *comp)
{
    CompEditorPrivate *priv;
    
    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));

    priv = editor->priv;

    if (priv->comp) {
        g_object_unref (priv->comp);
        priv->comp = NULL;
    }

    if (comp)
        priv->comp = e_cal_component_clone (comp);
    
    priv->existing_org = e_cal_component_has_organizer (comp);
    priv->user_org = itip_organizer_is_user (comp, priv->client);
    priv->warned = FALSE;
        
    set_title_from_comp (editor);
    set_icon_from_comp (editor);
    fill_widgets (editor);

    listen_for_changes (editor);
}


static gboolean
real_send_comp (CompEditor *editor, ECalComponentItipMethod method)
{
    CompEditorPrivate *priv;
    ECalComponent *tmp_comp;
    
    g_return_val_if_fail (editor != NULL, FALSE);
    g_return_val_if_fail (IS_COMP_EDITOR (editor), FALSE);

    priv = editor->priv;

    if (itip_send_comp (method, priv->comp, priv->client, NULL)) {
        tmp_comp = priv->comp;
        g_object_ref (tmp_comp);
        comp_editor_edit_comp (editor, tmp_comp);
        g_object_unref (tmp_comp);
        
        comp_editor_set_changed (editor, TRUE);
        save_comp (editor);

        return TRUE;
    }

    comp_editor_set_changed (editor, TRUE);

    return FALSE;
}


/**
 * comp_editor_edit_comp:
 * @editor: A component editor
 * @comp: A calendar component
 *
 * Starts the editor editing the given component
 **/
void
comp_editor_edit_comp (CompEditor *editor, ECalComponent *comp)
{
    CompEditorClass *klass;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));
    g_return_if_fail (comp != NULL);
    g_return_if_fail (E_IS_CAL_COMPONENT (comp));

    klass = COMP_EDITOR_CLASS (G_OBJECT_GET_CLASS (editor));

    if (klass->edit_comp)
        klass->edit_comp (editor, comp);
}

ECalComponent *
comp_editor_get_comp (CompEditor *editor)
{
    CompEditorPrivate *priv;

    g_return_val_if_fail (editor != NULL, NULL);
    g_return_val_if_fail (IS_COMP_EDITOR (editor), NULL);

    priv = editor->priv;

    return priv->comp;
}

ECalComponent *
comp_editor_get_current_comp (CompEditor *editor)
{
    CompEditorPrivate *priv;
    ECalComponent *comp;
    GList *l;

    g_return_val_if_fail (editor != NULL, NULL);
    g_return_val_if_fail (IS_COMP_EDITOR (editor), NULL);

    priv = editor->priv;

    comp = e_cal_component_clone (priv->comp);
    if (priv->changed) {
        for (l = priv->pages; l != NULL; l = l->next)
            comp_editor_page_fill_component (l->data, comp);
    }

    return comp;
}

/**
 * comp_editor_save_comp:
 * @editor:
 *
 *
 **/
gboolean
comp_editor_save_comp (CompEditor *editor, gboolean send)
{
    return prompt_to_save_changes (editor, send);
}

/**
 * comp_editor_delete_comp:
 * @editor:
 *
 *
 **/
void
comp_editor_delete_comp (CompEditor *editor)
{
    delete_comp (editor);
}

/**
 * comp_editor_send_comp:
 * @editor:
 * @method:
 *
 *
 **/
gboolean
comp_editor_send_comp (CompEditor *editor, ECalComponentItipMethod method)
{
    CompEditorClass *klass;

    g_return_val_if_fail (editor != NULL, FALSE);
    g_return_val_if_fail (IS_COMP_EDITOR (editor), FALSE);

    klass = COMP_EDITOR_CLASS (G_OBJECT_GET_CLASS (editor));

    if (klass->send_comp)
        return klass->send_comp (editor, method);

    return FALSE;
}

gboolean
comp_editor_close (CompEditor *editor)
{
    gboolean close;
    
    g_return_val_if_fail (editor != NULL, FALSE);
    g_return_val_if_fail (IS_COMP_EDITOR (editor), FALSE);

    commit_all_fields (editor);
    
    close = prompt_to_save_changes (editor, TRUE);
    if (close)
        close_dialog (editor);

    return close;
}

/* Brings attention to a window by raising it and giving it focus */
static void
raise_and_focus (GtkWidget *widget)
{
    g_assert (GTK_WIDGET_REALIZED (widget));
    gdk_window_show (widget->window);
    gtk_widget_grab_focus (widget);
}

/**
 * comp_editor_focus:
 * @editor: A component editor
 *
 * Brings the editor window to the front and gives it focus
 **/
void
comp_editor_focus (CompEditor *editor)
{
    CompEditorPrivate *priv;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));

    priv = editor->priv;

    gtk_widget_show (GTK_WIDGET (editor));
    raise_and_focus (GTK_WIDGET (editor));
}

/**
 * comp_editor_notify_client_changed:
 * @editor: A component editor.
 * 
 * Makes an editor emit the "client_changed" signal.
 **/
void
comp_editor_notify_client_changed (CompEditor *editor, ECal *client)
{
    GList *l;
    CompEditorPrivate *priv;
    gboolean read_only;

    g_return_if_fail (editor != NULL);
    g_return_if_fail (IS_COMP_EDITOR (editor));

    priv = editor->priv;

    priv->changed = TRUE;

    comp_editor_set_e_cal (editor, client);
    for (l = priv->pages; l != NULL; l = l->next)
        comp_editor_page_notify_client_changed (COMP_EDITOR_PAGE (l->data), client);

    if (!e_cal_is_read_only (client, &read_only, NULL))
        read_only = TRUE;

    gtk_dialog_set_response_sensitive (GTK_DIALOG (editor), GTK_RESPONSE_OK, !read_only);
}

static void
page_changed_cb (GtkObject *obj, gpointer data)
{
    CompEditor *editor = COMP_EDITOR (data);
    CompEditorPrivate *priv;

    priv = editor->priv;

    comp_editor_set_changed (editor, TRUE);

    if (!priv->warned && priv->existing_org && !priv->user_org) {
        e_notice (editor, GTK_MESSAGE_INFO,
              _("Changes made to this item may be discarded if an update arrives"));
        priv->warned = TRUE;
    }
    
}

static void
needs_send_cb (GtkObject *obj, gpointer data)
{
    CompEditor *editor = COMP_EDITOR (data);
    CompEditorPrivate *priv;

    priv = editor->priv;

    comp_editor_set_needs_send (editor, TRUE);
}

/* Page signal callbacks */
static void
page_summary_changed_cb (GtkObject *obj, const char *summary, gpointer data)
{
    CompEditor *editor = COMP_EDITOR (data);
    CompEditorPrivate *priv;
    GList *l;

    priv = editor->priv;

    for (l = priv->pages; l != NULL; l = l->next)
        if (obj != l->data)
            comp_editor_page_set_summary (l->data, summary);

    priv->changed = TRUE;

    if (!priv->warned && priv->existing_org && !priv->user_org) {
        e_notice (editor, GTK_MESSAGE_INFO,
              _("Changes made to this item may be discarded if an update arrives"));
        priv->warned = TRUE;
    }

    set_title_from_string (editor, summary);
}

static void
page_dates_changed_cb (GtkObject *obj,
               CompEditorPageDates *dates,
               gpointer data)
{
    CompEditor *editor = COMP_EDITOR (data);
    CompEditorPrivate *priv;
    GList *l;

    priv = editor->priv;

    for (l = priv->pages; l != NULL; l = l->next)
        if (obj != l->data)
            comp_editor_page_set_dates (l->data, dates);

    priv->changed = TRUE;

    if (!priv->warned && priv->existing_org && !priv->user_org) {
        e_notice (editor, GTK_MESSAGE_INFO,
              _("Changes made to this item may be discarded if an update arrives"));
        priv->warned = TRUE;
    }
}

static void
obj_modified_cb (ECal *client, GList *objects, gpointer data)
{
    CompEditor *editor = COMP_EDITOR (data);
    CompEditorPrivate *priv;
    ECalComponent *comp = NULL;

    priv = editor->priv;

    /* We queried based on a specific UID so we definitely changed */
    if (changed_component_dialog ((GtkWindow *) editor, priv->comp, FALSE, priv->changed)) {
        icalcomponent *icalcomp = icalcomponent_new_clone (objects->data);

        comp = e_cal_component_new ();
        if (e_cal_component_set_icalcomponent (comp, icalcomp)) {
            comp_editor_edit_comp (editor, comp);
        } else {
            GtkWidget *dlg;
            
            dlg = gnome_error_dialog (_("Unable to use current version!"));
            gnome_dialog_run_and_close (GNOME_DIALOG (dlg));
            icalcomponent_free (icalcomp);
        }

        g_object_unref (comp);
    }
}

static void
obj_removed_cb (ECal *client, GList *uids, gpointer data)
{
    CompEditor *editor = COMP_EDITOR (data);
    CompEditorPrivate *priv;

    priv = editor->priv;

    if (changed_component_dialog ((GtkWindow *) editor, priv->comp, TRUE, priv->changed))
        close_dialog (editor);
}