path: root/calendar/mark.c

/* Functions to mark calendars
 *
 * Copyright (C) 1998 Red Hat Software, Inc.
 *
 * Author: Federico Mena <federico@nuclecu.unam.mx>
 */

#include <config.h>
#include "mark.h"
#include "timeutil.h"


/* In the month item, marks all the days that are touched by the specified time span.  Assumes that
 * the time span is completely contained within the month.
 */
static void
mark_event_in_month (GnomeMonthItem *mitem, time_t start, time_t end)
{
    struct tm tm;
    GnomeCanvasItem *item;
    int day_index;
    
    tm = *localtime (&start);

    for (; start <= end; start += 60 * 60 * 24) {
        mktime (&tm); /* normalize the time */

        /* Figure out the day index that corresponds to this time */

        day_index = gnome_month_item_day2index (mitem, tm.tm_mday);
        g_assert (day_index >= 0);

        /* Mark the day box */

        item = gnome_month_item_num2child (mitem, GNOME_MONTH_ITEM_DAY_BOX + day_index);
        gnome_canvas_item_set (item,
                       "fill_color", "tan",
                       NULL);

        /* Mark the day label */

        item = gnome_month_item_num2child (mitem, GNOME_MONTH_ITEM_DAY_LABEL + day_index);
        gnome_canvas_item_set (item,
                       "fill_color", "black",
                       NULL);

        /* Next day */

        tm.tm_mday++;
    }
}

static void
mark_current_day (GnomeMonthItem *mitem)
{
    struct tm *tm;
    time_t t;
    int day_index;
    GnomeCanvasItem *item;

    t = time (NULL);
    tm = localtime (&t);

    if (((tm->tm_year + 1900) == mitem->year) && (tm->tm_mon == mitem->month)) {
        day_index = gnome_month_item_day2index (mitem, tm->tm_mday);
        item = gnome_month_item_num2child (mitem, GNOME_MONTH_ITEM_DAY_LABEL + day_index);
        gnome_canvas_item_set (item,
                       "fill_color", "blue",
                       NULL);
    }
}

void
mark_month_item (GnomeMonthItem *mitem, Calendar *cal)
{
    time_t month_begin, month_end;
    GList *list, *l;
    CalendarObject *co;

    month_begin = time_month_begin (time_from_day (mitem->year, mitem->month, 1));
    month_end = time_month_end (month_begin);

    list = calendar_get_events_in_range (cal, month_begin, month_end);

    for (l = list; l; l = l->next) {
        co = l->data;

        /* We clip the event's start and end times to the month's limits */

        mark_event_in_month (mitem, MAX (co->ev_start, month_begin), MIN (co->ev_end, month_end));
    }

    calendar_destroy_event_list (list);

    mark_current_day (mitem);
}

void
unmark_month_item (GnomeMonthItem *mitem)
{
    int i;
    GnomeCanvasItem *item;

    g_return_if_fail (mitem != NULL);
    g_return_if_fail (GNOME_IS_MONTH_ITEM (mitem));

    for (i = 0; i < 42; i++) {
        /* Box */

        item = gnome_month_item_num2child (GNOME_MONTH_ITEM (mitem), GNOME_MONTH_ITEM_DAY_BOX + i);
        gnome_canvas_item_set (item,
                       "fill_color", "#d6d6d6d6d6d6",
                       NULL);

        /* Label */

        item = gnome_month_item_num2child (GNOME_MONTH_ITEM (mitem), GNOME_MONTH_ITEM_DAY_LABEL + i);
        gnome_canvas_item_set (item,
                       "fill_color", "black",
                       NULL);
    }
}