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

/* Evolution calendar - Widget utilities
 *
 * Copyright (C) 2000 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 <ctype.h>
#include <string.h>
#include <ical.h>
#include <glib.h>
#include <gtk/gtklabel.h>
#include <libgnome/gnome-i18n.h>
#include <bonobo-activation/bonobo-activation.h>
#include <bonobo/bonobo-control.h>
#include <bonobo/bonobo-widget.h>
#include <ebook/e-destination.h>
#include <e-util/e-time-utils.h>
#include <cal-util/timeutil.h>
#include "../calendar-config.h"
#include "comp-editor-util.h"



/**
 * comp_editor_dates:
 * @dates: A structure to be filled out with dates of a component
 * @comp: The component to extract the dates from
 * 
 * Extracts the dates from the calendar component into the
 * CompEditorPageDates structure. Call comp_editor_free_dates() to free the
 * results.
 **/
void
comp_editor_dates (CompEditorPageDates *dates, CalComponent *comp)
{
    CalComponentDateTime dt;

    dates->start = NULL;
    dates->end = NULL;
    dates->due = NULL;
    dates->complete = NULL;
    
    /* Note that the CalComponentDateTime's returned contain allocated
       icaltimetype and tzid values, so we just take over ownership of
       those. */
    cal_component_get_dtstart (comp, &dt);
    if (dt.value) {
        dates->start = g_new (CalComponentDateTime, 1);
        *dates->start = dt;
    }

    cal_component_get_dtend (comp, &dt);
    if (dt.value) {
        dates->end = g_new (CalComponentDateTime, 1);
        *dates->end = dt;
    }

    cal_component_get_due (comp, &dt);
    if (dt.value) {
        dates->due = g_new (CalComponentDateTime, 1);
        *dates->due = dt;
    }

    cal_component_get_completed (comp, &dates->complete);
}


/* This frees the dates in the CompEditorPageDates struct. But it doesn't free
 * the struct (as that is usually static).
 */
void
comp_editor_free_dates (CompEditorPageDates *dates)
{
    /* Note that cal_component_free_datetime() only frees the fields in
       the struct. It doesn't free the struct itself, so we do that. */
    if (dates->start) {
        cal_component_free_datetime (dates->start);
        g_free (dates->start);
    }

    if (dates->end) {
        cal_component_free_datetime (dates->end);
        g_free (dates->end);
    }

    if (dates->due) {
        cal_component_free_datetime (dates->due);
        g_free (dates->due);
    }

    if (dates->complete)
        cal_component_free_icaltimetype (dates->complete);
}


/* dtstart is only passed in if tt is the dtend. */
static void
write_label_piece (struct icaltimetype *tt, char *buffer, int size,
           char *stext, char *etext, struct icaltimetype *dtstart)
{
    struct tm tmp_tm = { 0 };
    struct icaltimetype tt_copy = *tt;
    int len;
    
    /* FIXME: May want to convert the time to an appropriate zone. */

    if (stext != NULL)
        strcat (buffer, stext);

    /* If we are writing the DTEND (i.e. DTSTART is set), and
       DTEND > DTSTART, subtract 1 day. The DTEND date is not inclusive. */
    if (tt_copy.is_date && dtstart
        && icaltime_compare_date_only (tt_copy, *dtstart) > 0) {
        icaltime_adjust (&tt_copy, -1, 0, 0, 0);
    }

    tmp_tm.tm_year = tt_copy.year - 1900;
    tmp_tm.tm_mon = tt_copy.month - 1;
    tmp_tm.tm_mday = tt_copy.day;
    tmp_tm.tm_hour = tt_copy.hour;
    tmp_tm.tm_min = tt_copy.minute;
    tmp_tm.tm_sec = tt_copy.second;
    tmp_tm.tm_isdst = -1;

    tmp_tm.tm_wday = time_day_of_week (tt_copy.day, tt_copy.month - 1,
                       tt_copy.year);

    len = strlen (buffer);
    e_time_format_date_and_time (&tmp_tm,
                     calendar_config_get_24_hour_format (), 
                     !tt_copy.is_date, FALSE,
                     &buffer[len], size - len);
    if (etext != NULL)
        strcat (buffer, etext);
}

/**
 * comp_editor_date_label:
 * @dates: The dates to use in constructing a label
 * @label: The label whose text is to be set
 * 
 * Set the text of a label based on the dates available and the user's
 * formatting preferences
 **/
void
comp_editor_date_label (CompEditorPageDates *dates, GtkWidget *label)
{
    char buffer[1024];
    gboolean start_set = FALSE, end_set = FALSE;
    gboolean complete_set = FALSE, due_set = FALSE;

    buffer[0] = '\0';

    if (dates->start && !icaltime_is_null_time (*dates->start->value))
        start_set = TRUE;
    if (dates->end && !icaltime_is_null_time (*dates->end->value))
        end_set = TRUE;
    if (dates->complete && !icaltime_is_null_time (*dates->complete))
        complete_set = TRUE;
    if (dates->due && !icaltime_is_null_time (*dates->due->value))
        due_set = TRUE;

    if (start_set)
        write_label_piece (dates->start->value, buffer, 1024,
                   NULL, NULL, NULL);

    if (start_set && end_set)
        write_label_piece (dates->end->value, buffer, 1024,
                   _(" to "), NULL, dates->start->value);

    if (complete_set) {
        if (start_set)
            write_label_piece (dates->complete, buffer, 1024, _(" (Completed "), ")", NULL);
        else
            write_label_piece (dates->complete, buffer, 1024, _("Completed "), NULL, NULL);
    }
    
    if (due_set && dates->complete == NULL) {
        if (start_set)
            write_label_piece (dates->due->value, buffer, 1024, _(" (Due "), ")", NULL);
        else
            write_label_piece (dates->due->value, buffer, 1024, _("Due "), NULL, NULL);
    }

    gtk_label_set_text (GTK_LABEL (label), buffer);
}

/**
 * comp_editor_new_date_edit:
 * @show_date: Whether to show a date picker in the widget.
 * @show_time: Whether to show a time picker in the widget.
 * @make_time_insensitive: Whether the time field is made insensitive rather
 * than hiding it. This is useful if you want to preserve the layout of the
 * widgets.
 * 
 * Creates a new #EDateEdit widget, configured using the calendar's preferences.
 * 
 * Return value: A newly-created #EDateEdit widget.
 **/
GtkWidget *
comp_editor_new_date_edit (gboolean show_date, gboolean show_time,
               gboolean make_time_insensitive)
{
    EDateEdit *dedit;

    dedit = E_DATE_EDIT (e_date_edit_new ());

    e_date_edit_set_show_date (dedit, show_date);
    e_date_edit_set_show_time (dedit, show_time);
#if 0
    e_date_edit_set_make_time_insensitive (dedit, make_time_insensitive);
#else
    e_date_edit_set_make_time_insensitive (dedit, FALSE);
#endif
    calendar_config_configure_e_date_edit (dedit);

    return GTK_WIDGET (dedit);
}


/* Returns the current time, for EDateEdit widgets and ECalendar items in the
   dialogs.
   FIXME: Should probably use the timezone from somewhere in the component
   rather than the current timezone. */
struct tm
comp_editor_get_current_time (GtkObject *object, gpointer data)
{
    char *location;
    icaltimezone *zone;
    struct icaltimetype tt;
    struct tm tmp_tm = { 0 };

    /* Get the current timezone. */
    location = calendar_config_get_timezone ();
    zone = icaltimezone_get_builtin_timezone (location);

    tt = icaltime_from_timet_with_zone (time (NULL), FALSE, zone);

    /* Now copy it to the struct tm and return it. */
    tmp_tm.tm_year  = tt.year - 1900;
    tmp_tm.tm_mon   = tt.month - 1;
    tmp_tm.tm_mday  = tt.day;
    tmp_tm.tm_hour  = tt.hour;
    tmp_tm.tm_min   = tt.minute;
    tmp_tm.tm_sec   = tt.second;
    tmp_tm.tm_isdst = -1;

    return tmp_tm;
}



/*
 * These are utility functions to handle the SelectNames control we use
 * for the contacts field, and its related dialog.
 */

#define SELECT_NAMES_OAFID "OAFIID:GNOME_Evolution_Addressbook_SelectNames"

GNOME_Evolution_Addressbook_SelectNames
comp_editor_create_contacts_component (void)
{
    GNOME_Evolution_Addressbook_SelectNames corba_select_names;
    CORBA_Environment ev;

    CORBA_exception_init (&ev);
    corba_select_names = bonobo_activation_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'.  Is this true with BonoboActivation? */
    if (ev._major != CORBA_NO_EXCEPTION
        || corba_select_names == CORBA_OBJECT_NIL) {
        g_warning ("Cannot activate -- %s", SELECT_NAMES_OAFID);
        CORBA_exception_free (&ev);
        return CORBA_OBJECT_NIL;
    }

    CORBA_exception_free (&ev);

    return corba_select_names;
}


GtkWidget *
comp_editor_create_contacts_control (GNOME_Evolution_Addressbook_SelectNames corba_select_names)
{
    Bonobo_Control corba_control;
    GtkWidget *control_widget;
    CORBA_Environment ev;
    char *name = _("Contacts");

    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);

    gtk_widget_show (control_widget);

    return control_widget;
}


void
comp_editor_connect_contacts_changed (GtkWidget *contacts_entry,
                      BonoboListenerCallbackFn changed_cb,
                      gpointer changed_cb_data)
{
    BonoboControlFrame *cf;
    Bonobo_PropertyBag pb = CORBA_OBJECT_NIL;

    cf = bonobo_widget_get_control_frame (BONOBO_WIDGET (contacts_entry));
    pb = bonobo_control_frame_get_control_property_bag (cf, NULL);

    bonobo_event_source_client_add_listener (
        pb, changed_cb,
        "Bonobo/Property:change:entry_changed",
        NULL, changed_cb_data);
}


void
comp_editor_show_contacts_dialog (GNOME_Evolution_Addressbook_SelectNames corba_select_names)
{
    CORBA_Environment ev;

    CORBA_exception_init (&ev);
    GNOME_Evolution_Addressbook_SelectNames_activateDialog (
        corba_select_names, _("Contacts"), &ev);
    CORBA_exception_free (&ev);
}


/* A simple 'name <email>' parser. Input should be UTF8.
   FIXME: Should probably use camel functions or something. */
static void
parse_contact_string (const char *value, char **name, char **email)
{
    char *lbracket, *rbracket, *name_end, *tmp_name, *tmp_email;

    if (!value) {
        *name = g_strdup ("");
        *email = g_strdup ("");
        return;
    }

    lbracket = g_utf8_strchr (value, g_utf8_strlen (value, 0), '<');
    rbracket = g_utf8_strchr (value, g_utf8_strlen (value, 0), '>');

    if (!lbracket || !rbracket || rbracket < lbracket) {
        *name = g_strdup (value);
        *email = g_strdup ("");
        return;
    }

    name_end = g_utf8_prev_char (lbracket);
    while (name_end > value && g_unichar_isspace (g_utf8_get_char (name_end)))
        name_end = g_utf8_prev_char (name_end);

    tmp_name = g_malloc (name_end - value + 2);
    strncpy (tmp_name, value, name_end - value + 1);
    tmp_name[name_end - value + 1] = '\0';
    *name = tmp_name;

    tmp_email = g_malloc (rbracket - lbracket);
    strncpy (tmp_email, lbracket + 1, rbracket - lbracket - 1);
    tmp_email[rbracket - lbracket - 1] = '\0';
    *email = tmp_email;

#if 0
    g_print ("Parsed: %s\n  Name:'%s'\nEmail:'%s'\n",
         value, *name, *email);
#endif
}


void
comp_editor_contacts_to_widget (GtkWidget *contacts_entry,
                CalComponent *comp)
{
    GPtrArray *dest_array;
    EDestination *dest;
    GSList *contact_list, *elem;
    char *contacts_string;
    int i;

    cal_component_get_contact_list (comp, &contact_list);
    dest_array = g_ptr_array_new ();
    for (elem = contact_list; elem; elem = elem->next) {
        CalComponentText *t = elem->data;
        char *name, *email;

        parse_contact_string (t->value, &name, &email);

        dest = e_destination_new ();
        e_destination_set_name (dest, name);
        e_destination_set_email (dest, email);
        g_ptr_array_add (dest_array, dest);
        g_free (name);
        g_free (email);
    }
    cal_component_free_text_list (contact_list);

    /* we need destv to be NULL terminated */
    g_ptr_array_add (dest_array, NULL);

    contacts_string = e_destination_exportv ((EDestination**) dest_array->pdata);
#if 0
    g_print ("Destinations: %s\n", contacts_string ? contacts_string : "");
#endif

    bonobo_widget_set_property (BONOBO_WIDGET (contacts_entry),
                    "destinations", TC_CORBA_string, contacts_string, NULL);

    g_free (contacts_string);

    /* We free all dest_array except the last NULL we added. */
    for (i = 0; i < dest_array->len - 1; i++) {
        dest = g_ptr_array_index (dest_array, i);
        gtk_object_unref (GTK_OBJECT (dest));
    }
    g_ptr_array_free (dest_array, TRUE);
}


void
comp_editor_contacts_to_component (GtkWidget *contacts_entry,
                   CalComponent *comp)
{
    EDestination **contact_destv;
    GSList *contact_list = NULL, *elem;
    char *contacts_string = NULL;
    CalComponentText *t;
    const char *name, *email;
    int i;

    bonobo_widget_get_property (BONOBO_WIDGET (contacts_entry),
                    "destinations", TC_CORBA_string, &contacts_string, NULL);
#if 0
    g_print ("Contacts string: %s\n", contacts_string ? contacts_string : "");
#endif

    contact_destv = e_destination_importv (contacts_string);
    if (contact_destv) {
        for (i = 0; contact_destv[i] != NULL; i++) {
            name = e_destination_get_name (contact_destv[i]);
            email = e_destination_get_email (contact_destv[i]);

            t = g_new0 (CalComponentText, 1);
            t->altrep = NULL;

            /* If both name and email are given, use the standard
               '"name" <email>' form, otherwise use just the name
               or the email address.
               FIXME: I'm not sure this is correct syntax etc. */
            if (name && name[0] && email && email[0])
                t->value = g_strdup_printf ("\"%s\" <%s>",
                                name, email);
            else if (name && name[0])
                t->value = g_strdup_printf ("\"%s\"",
                                name);
            else
                t->value = g_strdup_printf ("<%s>",
                                email);

            contact_list = g_slist_prepend (contact_list, t);

            gtk_object_unref (GTK_OBJECT (contact_destv[i]));
        }
    }
    g_free (contact_destv);

    contact_list = g_slist_reverse (contact_list);
    cal_component_set_contact_list (comp, contact_list);

    for (elem = contact_list; elem; elem = elem->next) {
        t = elem->data;
        g_free ((char*)t->value);
        g_free (t);
    }
    g_slist_free (contact_list);
}

/**
 * comp_editor_strip_categories:
 * @categories: A string of category names entered by the user.
 * 
 * Takes a string of the form "categ, categ, categ, ..." and removes the
 * whitespace between categories to result in "categ,categ,categ,..."
 * 
 * Return value: The category names stripped of surrounding whitespace
 * and separated with commas.
 **/
char *
comp_editor_strip_categories (const char *categories)
{
    char *new_categories;
    const char *start, *end;
    const char *p;
    char *new_p;

    if (!categories)
        return NULL;

    new_categories = g_new (char, strlen (categories) + 1);

    start = end = NULL;
    new_p = new_categories;

    for (p = categories; *p; p++) {
        int c;

        c = *p;

        if (isspace (c))
            continue;
        else if (c == ',') {
            int len;

            if (!start)
                continue;

            g_assert (start <= end);

            len = end - start + 1;
            strncpy (new_p, start, len);
            new_p[len] = ',';
            new_p += len + 1;

            start = end = NULL;
        } else {
            if (!start) {
                start = p;
                end = p;
            } else
                end = p;
        }
    }

    if (start) {
        int len;

        g_assert (start <= end);

        len = end - start + 1;
        strncpy (new_p, start, len);
        new_p += len;
    }

    *new_p = '\0';

    return new_categories;
}