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

/*
 * Evolution calendar - Widget utilities
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Federico Mena-Quintero <federico@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include <ctype.h>
#include <string.h>
#include <libical/ical.h>
#include <glib/gi18n.h>
#include <libedataserver/e-time-utils.h>
#include <libecal/e-cal-time-util.h>
#include "../calendar-config.h"
#include "../e-date-edit-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, ECalComponent *comp)
{
    ECalComponentDateTime dt;

    dates->start = NULL;
    dates->end = NULL;
    dates->due = NULL;
    dates->complete = NULL;

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

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

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

    e_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 e_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) {
        e_cal_component_free_datetime (dates->start);
        g_free (dates->start);
    }

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

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

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


/* dtstart is only passed in if tt is the dtend. */
static void
write_label_piece (struct icaltimetype *tt,
                   gchar *buffer,
                   gint size,
                   gchar *stext,
                   const gchar *etext,
                   struct icaltimetype *dtstart)
{
    struct tm tmp_tm = { 0 };
    struct icaltimetype tt_copy = *tt;
    gint 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)
{
    gchar 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);
}

static void
date_edit_destroy_cb (EDateEdit *date_edit, gpointer data)
{
    EDateEditConfig *config = data;

    g_object_unref (config);
}

/**
 * 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;
    EDateEditConfig *config;

    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

    config = e_date_edit_config_new (dedit);
    g_signal_connect (G_OBJECT (dedit), "destroy", G_CALLBACK (date_edit_destroy_cb), config);

    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)
{
    icaltimezone *zone;
    struct icaltimetype tt;
    struct tm tmp_tm = { 0 };

    /* Get the current timezone. */
    zone = calendar_config_get_icaltimezone ();

    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;
}



/**
 * 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.
 **/
gchar *
comp_editor_strip_categories (const gchar *categories)
{
    gchar *new_categories;
    const gchar *start, *end;
    const gchar *p;
    gchar *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 = g_utf8_next_char (p)) {
        gunichar c;

        c = g_utf8_get_char (p);

        if (g_unichar_isspace (c))
            continue;
        else if (c == ',') {
            gint len;

            if (!start)
                continue;

            g_return_val_if_fail (start <= end, NULL);

            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 = g_utf8_next_char(p) - 1;
        }
    }

    if (start) {
        gint len;

        g_return_val_if_fail (start <= end, NULL);

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

    *new_p = '\0';

    return new_categories;
}