path: root/calendar/gui/e-tasks.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-tasks.c
 *
 * Copyright (C) 2001  Ximian, Inc.
 * Copyright (C) 2001  Ximian, 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.
 *
 * Authors: Federico Mena Quintero <federico@ximian.com>
 *      Damon Chaplin <damon@ximian.com>
 */

#include <config.h>
#include <gnome.h>
#include <gal/util/e-util.h>
#include <gal/e-table/e-table-scrolled.h>
#include <gal/menus/gal-view-collection.h>
#include <gal/menus/gal-view-factory-etable.h>
#include <gal/menus/gal-view-etable.h>
#include "widgets/menus/gal-view-menus.h"
#include "dialogs/task-editor.h"
#include "calendar-config.h"
#include "component-factory.h"

#include "e-tasks.h"

/* A list of all of the ETasks widgets in use. We use this to update the
   user preference settings. This will change when we switch to GConf. */
static GList *all_tasks = NULL;


/* Private part of the GnomeCalendar structure */
struct _ETasksPrivate {
    /* The calendar client object we monitor */
    CalClient   *client;

    /* The ECalendarTable showing the tasks. */
    GtkWidget   *tasks_view;

    /* The option menu showing the categories, and the popup menu. */
    GtkWidget *categories_option_menu;
    GtkWidget *categories_menu;

    /* View collection and the view menus handler */
    GalViewCollection *view_collection;
    GalViewMenus *view_menus;
};


static void e_tasks_class_init (ETasksClass *class);
static void e_tasks_init (ETasks *tasks);
static void setup_widgets (ETasks *tasks);
static void e_tasks_destroy (GtkObject *object);

static void cal_opened_cb (CalClient *client, CalClientOpenStatus status, gpointer data);
static void obj_updated_cb (CalClient *client, const char *uid, gpointer data);
static void obj_removed_cb (CalClient *client, const char *uid, gpointer data);

static char* e_tasks_get_config_filename (ETasks *tasks);

static void e_tasks_on_filter_selected  (GtkMenuShell   *menu_shell,
                     ETasks     *tasks);
static void e_tasks_on_categories_changed   (CalendarModel  *model,
                         ETasks     *tasks);
static void e_tasks_rebuild_categories_menu (ETasks     *tasks);
static gint e_tasks_add_menu_item       (gpointer key,
                         gpointer value,
                         gpointer data);

/* Signal IDs */
enum {
    SELECTION_CHANGED,
    LAST_SIGNAL
};

static GtkTableClass *parent_class;
static guint e_tasks_signals[LAST_SIGNAL] = { 0 };


E_MAKE_TYPE (e_tasks, "ETasks", ETasks,
         e_tasks_class_init, e_tasks_init,
         GTK_TYPE_TABLE)


/* Class initialization function for the gnome calendar */
static void
e_tasks_class_init (ETasksClass *class)
{
    GtkObjectClass *object_class;

    object_class = (GtkObjectClass *) class;

    parent_class = gtk_type_class (GTK_TYPE_TABLE);

    e_tasks_signals[SELECTION_CHANGED] =
        gtk_signal_new ("selection_changed",
                GTK_RUN_FIRST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETasksClass, selection_changed),
                gtk_marshal_NONE__INT,
                GTK_TYPE_NONE, 1,
                GTK_TYPE_INT);

    gtk_object_class_add_signals (object_class, e_tasks_signals, LAST_SIGNAL);

    object_class->destroy = e_tasks_destroy;

    class->selection_changed = NULL;
}


/* Object initialization function for the gnome calendar */
static void
e_tasks_init (ETasks *tasks)
{
    ETasksPrivate *priv;

    priv = g_new0 (ETasksPrivate, 1);
    tasks->priv = priv;

    setup_widgets (tasks);
}

/* Callback used when the selection changes in the table. */
static void
table_selection_change_cb (ETable *etable, gpointer data)
{
    ETasks *tasks;
    int n_selected;

    tasks = E_TASKS (data);

    n_selected = e_table_selected_count (etable);
    gtk_signal_emit (GTK_OBJECT (tasks), e_tasks_signals[SELECTION_CHANGED],
             n_selected);
}

#define E_TASKS_TABLE_DEFAULT_STATE                 \
    "<?xml version=\"1.0\"?>"                   \
    "<ETableState>"                         \
    "<column source=\"13\"/>"                   \
    "<column source=\"14\"/>"                   \
    "<column source=\"9\"/>"                    \
    "<column source=\"5\"/>"                    \
    "<grouping/>"                           \
    "</ETableState>"


static void
setup_widgets (ETasks *tasks)
{
    ETasksPrivate *priv;
    ETable *etable;
    GtkWidget *hbox, *menuitem, *categories_label;
    CalendarModel *model;

    priv = tasks->priv;

    hbox = gtk_hbox_new (FALSE, 0);
    gtk_widget_show (hbox);
    gtk_table_attach (GTK_TABLE (tasks), hbox, 0, 1, 0, 1,
              GTK_EXPAND | GTK_FILL, 0, 0, 0);

    priv->categories_option_menu = gtk_option_menu_new ();
    gtk_widget_show (priv->categories_option_menu);
    gtk_box_pack_end (GTK_BOX (hbox), priv->categories_option_menu,
              FALSE, FALSE, 0);

    priv->categories_menu = gtk_menu_new ();

    menuitem = gtk_menu_item_new_with_label (_("All"));
    gtk_widget_show (menuitem);
    gtk_menu_append (GTK_MENU (priv->categories_menu), menuitem);

    gtk_option_menu_set_menu (GTK_OPTION_MENU (priv->categories_option_menu), priv->categories_menu);

    categories_label = gtk_label_new (_("Category:"));
    gtk_widget_show (categories_label);
    gtk_box_pack_end (GTK_BOX (hbox), categories_label, FALSE, FALSE, 4);


    priv->tasks_view = e_calendar_table_new ();
    model = e_calendar_table_get_model (E_CALENDAR_TABLE (priv->tasks_view));
    calendar_model_set_new_comp_vtype (model, CAL_COMPONENT_TODO);
    etable = e_table_scrolled_get_table (E_TABLE_SCROLLED (E_CALENDAR_TABLE (priv->tasks_view)->etable));
    e_table_set_state (etable, E_TASKS_TABLE_DEFAULT_STATE);
    gtk_table_attach (GTK_TABLE (tasks), priv->tasks_view, 0, 1, 1, 2,
              GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
    gtk_widget_show (priv->tasks_view);
    calendar_config_configure_e_calendar_table (E_CALENDAR_TABLE (priv->tasks_view));

    gtk_signal_connect (GTK_OBJECT (E_CALENDAR_TABLE (priv->tasks_view)->model),
                "categories-changed",
                GTK_SIGNAL_FUNC (e_tasks_on_categories_changed), tasks);

    gtk_signal_connect (GTK_OBJECT (etable), "selection_change",
                GTK_SIGNAL_FUNC (table_selection_change_cb), tasks);
}


GtkWidget *
e_tasks_construct (ETasks *tasks)
{
    ETasksPrivate *priv;

    g_return_val_if_fail (tasks != NULL, NULL);
    g_return_val_if_fail (E_IS_TASKS (tasks), NULL);

    priv = tasks->priv;

    priv->client = cal_client_new ();
    if (!priv->client)
        return NULL;

    gtk_signal_connect (GTK_OBJECT (priv->client), "cal_opened",
                GTK_SIGNAL_FUNC (cal_opened_cb), tasks);
    gtk_signal_connect (GTK_OBJECT (priv->client), "obj_updated",
                GTK_SIGNAL_FUNC (obj_updated_cb), tasks);
    gtk_signal_connect (GTK_OBJECT (priv->client), "obj_removed",
                GTK_SIGNAL_FUNC (obj_removed_cb), tasks);

    e_calendar_table_set_cal_client (E_CALENDAR_TABLE (priv->tasks_view),
                     priv->client);

    return GTK_WIDGET (tasks);
}


GtkWidget *
e_tasks_new (void)
{
    ETasks *tasks;

    tasks = gtk_type_new (e_tasks_get_type ());

    if (!e_tasks_construct (tasks)) {
        g_message ("e_tasks_new(): Could not construct the tasks GUI");
        gtk_object_unref (GTK_OBJECT (tasks));
        return NULL;
    }

    all_tasks = g_list_prepend (all_tasks, tasks);

    return GTK_WIDGET (tasks);
}


static void
e_tasks_destroy (GtkObject *object)
{
    ETasks *tasks;
    ETasksPrivate *priv;
    char *config_filename;

    g_return_if_fail (object != NULL);
    g_return_if_fail (E_IS_TASKS (object));

    tasks = E_TASKS (object);
    priv = tasks->priv;

    /* Save the ETable layout. */
    config_filename = e_tasks_get_config_filename (tasks);
    e_calendar_table_save_state (E_CALENDAR_TABLE (priv->tasks_view),
                     config_filename);
    g_free (config_filename);

    if (priv->client) {
        gtk_object_unref (GTK_OBJECT (priv->client));
        priv->client = NULL;
    }

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

    all_tasks = g_list_remove (all_tasks, tasks);

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


gboolean
e_tasks_open            (ETasks     *tasks,
                 char       *file)
{
    ETasksPrivate *priv;
    char *config_filename;

    g_return_val_if_fail (tasks != NULL, FALSE);
    g_return_val_if_fail (E_IS_TASKS (tasks), FALSE);
    g_return_val_if_fail (file != NULL, FALSE);

    priv = tasks->priv;

    if (!cal_client_open_calendar (priv->client, file, FALSE)) {
        g_message ("e_tasks_open(): Could not issue the request");
        return FALSE;
    }

    config_filename = e_tasks_get_config_filename (tasks);
    e_calendar_table_load_state (E_CALENDAR_TABLE (priv->tasks_view),
                     config_filename);
    g_free (config_filename);

    return TRUE;
}


/* Displays an error to indicate that loading a calendar failed */
static void
load_error              (ETasks     *tasks,
                     const char *uri)
{
    char *msg;

    msg = g_strdup_printf (_("Could not load the tasks in `%s'"), uri);
    gnome_error_dialog_parented (msg, GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (tasks))));
    g_free (msg);
}

/* Displays an error to indicate that the specified URI method is not supported */
static void
method_error                (ETasks     *tasks,
                     const char *uri)
{
    char *msg;

    msg = g_strdup_printf (_("The method required to load `%s' is not supported"), uri);
    gnome_error_dialog_parented (msg, GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (tasks))));
    g_free (msg);
}

/* Callback from the calendar client when a calendar is opened */
static void
cal_opened_cb               (CalClient  *client,
                     CalClientOpenStatus status,
                     gpointer    data)
{
    ETasks *tasks;
    ETasksPrivate *priv;

    tasks = E_TASKS (data);
    priv = tasks->priv;

    switch (status) {
    case CAL_CLIENT_OPEN_SUCCESS:
        /* Everything is OK */
        return;

    case CAL_CLIENT_OPEN_ERROR:
        load_error (tasks, cal_client_get_uri (client));
        break;

    case CAL_CLIENT_OPEN_NOT_FOUND:
        /* bullshit; we did not specify only_if_exists */
        g_assert_not_reached ();
        return;

    case CAL_CLIENT_OPEN_METHOD_NOT_SUPPORTED:
        method_error (tasks, cal_client_get_uri (client));
        break;

    default:
        g_assert_not_reached ();
    }
}


/* Callback from the calendar client when an object is updated */
static void
obj_updated_cb              (CalClient  *client,
                     const char *uid,
                     gpointer    data)
{
    ETasks *tasks;
    ETasksPrivate *priv;

    tasks = E_TASKS (data);
    priv = tasks->priv;

    /* FIXME: Do we need to do anything? */
}


/* Callback from the calendar client when an object is removed */
static void
obj_removed_cb              (CalClient  *client,
                     const char *uid,
                     gpointer    data)
{
    ETasks *tasks;
    ETasksPrivate *priv;

    tasks = E_TASKS (data);
    priv = tasks->priv;

    /* FIXME: Do we need to do anything? */
}


static char*
e_tasks_get_config_filename     (ETasks     *tasks)
{
    ETasksPrivate *priv;
    char *url, *filename;

    priv = tasks->priv;

    url = g_strdup (cal_client_get_uri (priv->client));

    /* This turns all funny characters into '_', in the string itself. */
    e_filename_make_safe (url);
    
    filename = g_strdup_printf ("%s/config/et-header-%s", evolution_dir,
                    url);
    g_free (url);
    
    return filename;
}


/**
 * e_tasks_get_cal_client:
 * @tasks: An #ETasks.
 *
 * Queries the calendar client interface object that a tasks view is using.
 *
 * Return value: A calendar client interface object.
 **/
CalClient *
e_tasks_get_cal_client          (ETasks     *tasks)
{
    ETasksPrivate *priv;

    g_return_val_if_fail (E_IS_TASKS (tasks), NULL);

    priv = tasks->priv;

    return priv->client;
}


void
e_tasks_new_task            (ETasks     *tasks)
{
    ETasksPrivate *priv;
    TaskEditor *tedit;
    CalComponent *comp;

    g_return_if_fail (E_IS_TASKS (tasks));

    priv = tasks->priv;

    tedit = task_editor_new ();
    comp_editor_set_cal_client (COMP_EDITOR (tedit), priv->client);

    comp = cal_component_new ();
    cal_component_set_new_vtype (comp, CAL_COMPONENT_TODO);

    comp_editor_edit_comp (COMP_EDITOR (tedit), comp);
    gtk_object_unref (GTK_OBJECT (comp));

    comp_editor_focus (COMP_EDITOR (tedit));
}

/**
 * e_tasks_delete_selected:
 * @tasks: A tasks control widget.
 * 
 * Deletes the selected tasks in the task list.
 **/
void
e_tasks_delete_selected (ETasks *tasks)
{
    ETasksPrivate *priv;
    ECalendarTable *cal_table;

    g_return_if_fail (tasks != NULL);
    g_return_if_fail (E_IS_TASKS (tasks));

    priv = tasks->priv;

    cal_table = E_CALENDAR_TABLE (priv->tasks_view);
    e_calendar_table_delete_selected (cal_table);
}


static void
e_tasks_on_filter_selected      (GtkMenuShell   *menu_shell,
                     ETasks     *tasks)
{
    ETasksPrivate *priv;
    ECalendarTable *cal_table;
    CalendarModel *model;
    GtkWidget *label;
    char *category;

    g_return_if_fail (E_IS_TASKS (tasks));

    priv = tasks->priv;

    label = GTK_BIN (priv->categories_option_menu)->child;
    gtk_label_get (GTK_LABEL (label), &category);

    cal_table = E_CALENDAR_TABLE (priv->tasks_view);
    model = cal_table->model;

    if (!strcmp (category, _("All"))) {
        calendar_model_set_default_category (model, NULL);
        e_calendar_table_set_filter_func (cal_table, NULL, NULL,
                          NULL);
    } else {
        calendar_model_set_default_category (model, category);
        e_calendar_table_set_filter_func (cal_table,
                          e_calendar_table_filter_by_category,
                          g_strdup (category), g_free);
    }
}


static void
e_tasks_on_categories_changed   (CalendarModel  *model,
                 ETasks     *tasks)
{
    e_tasks_rebuild_categories_menu (tasks);
}


static void
e_tasks_rebuild_categories_menu (ETasks     *tasks)
{
    ETasksPrivate *priv;
    CalendarModel *model;
    GTree *categories;
    GtkWidget *menuitem;

    priv = tasks->priv;

    priv->categories_menu = gtk_menu_new ();

    menuitem = gtk_menu_item_new_with_label (_("All"));
    gtk_widget_show (menuitem);
    gtk_menu_append (GTK_MENU (priv->categories_menu), menuitem);

    model = E_CALENDAR_TABLE (priv->tasks_view)->model;
    categories = calendar_model_get_categories (model);
    g_return_if_fail (categories != NULL);

    g_tree_traverse (categories, e_tasks_add_menu_item, G_IN_ORDER,
             priv->categories_menu);

    gtk_option_menu_set_menu (GTK_OPTION_MENU (priv->categories_option_menu), priv->categories_menu);

    gtk_signal_connect (GTK_OBJECT (priv->categories_menu), "deactivate",
                GTK_SIGNAL_FUNC (e_tasks_on_filter_selected),
                tasks);
}


static gint
e_tasks_add_menu_item       (gpointer key,
                 gpointer value,
                 gpointer data)
{
    GtkWidget *menuitem;

    menuitem = gtk_menu_item_new_with_label ((char*) key);
    gtk_widget_show (menuitem);
    gtk_menu_append (GTK_MENU (data), menuitem);

    return FALSE;
}

static void
display_view(GalViewCollection *collection,
         GalView *view,
         gpointer data)
{
    ETasks *tasks = data;
    if (GAL_IS_VIEW_ETABLE(view)) {
        e_table_set_state_object (e_table_scrolled_get_table (E_TABLE_SCROLLED (E_CALENDAR_TABLE (tasks->priv->tasks_view)->etable)), GAL_VIEW_ETABLE (view)->state);
    }
}

void
e_tasks_setup_menus (ETasks            *tasks,
             BonoboUIComponent *uic)
{
    GalViewCollection *collection;
    GalViewMenus *views;
    GalViewFactory *factory;
    ETableSpecification *spec;
    char *dir;

    collection = gal_view_collection_new();

    dir = gnome_util_prepend_user_home ("/evolution/views/tasks/");
    gal_view_collection_set_storage_directories (collection,
                             EVOLUTION_DATADIR "/evolution/views/tasks/",
                             dir);
    g_free (dir);

    spec = e_table_specification_new ();
    e_table_specification_load_from_string (spec, e_calendar_table_get_spec());

    factory = gal_view_factory_etable_new (spec);
    gal_view_collection_add_factory (collection, factory);
    gtk_object_sink (GTK_OBJECT (factory));

    gal_view_collection_load (collection);

    views = gal_view_menus_new (collection);
    gal_view_menus_apply (views, uic, NULL); /* This function probably needs to sink the views object. */
    gtk_signal_connect (GTK_OBJECT (collection), "display_view",
                display_view, tasks);
    /*  gtk_object_sink(GTK_OBJECT(views)); */

    gtk_object_sink (GTK_OBJECT (collection));
}

/**
 * e_tasks_get_calendar_table:
 * @tasks: A tasks widget.
 * 
 * Queries the #ECalendarTable contained in a tasks widget.
 * 
 * Return value: The #ECalendarTable that the tasks widget uses to display its
 * information.
 **/
ECalendarTable *
e_tasks_get_calendar_table (ETasks *tasks)
{
    ETasksPrivate *priv;

    g_return_val_if_fail (tasks != NULL, NULL);
    g_return_val_if_fail (E_IS_TASKS (tasks), NULL);

    priv = tasks->priv;
    return E_CALENDAR_TABLE (priv->tasks_view);
}

/* This updates all the preference settings for all the ETasks widgets in use.
 */
void
e_tasks_update_all_config_settings  (void)
{
    ETasks *tasks;
    ETasksPrivate *priv;
    GList *elem;

    for (elem = all_tasks; elem; elem = elem->next) {
        tasks = E_TASKS (elem->data);
        priv = tasks->priv;
        calendar_config_configure_e_calendar_table (E_CALENDAR_TABLE (priv->tasks_view));
    }
}