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GtkCalendar: Use GDateTime for calculations

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Instead of old copy-paste code, use GDateTime to determine week
numbers and days of week.
This commit is contained in:
Matthias Clasen 2014-12-23 20:28:49 -05:00
parent a7cf67f201
commit 6ae93f5c46
1 changed files with 33 additions and 98 deletions
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131
gtk/gtkcalendar.c
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@ -4,9 +4,6 @@
* GTK Calendar Widget
* Copyright (C) 1998 Cesar Miquel, Shawn T. Amundson and Mattias Groenlund
*
* lib_date routines
* Copyright (c) 1995, 1996, 1997, 1998 by Steffen Beyer
*
* This library 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
@ -86,12 +83,6 @@
#define TIMEOUT_INITIAL 500
#define TIMEOUT_REPEAT 50
/***************************************************************************/
/* The following date routines are taken from the lib_date package.
* They have been minimally edited to avoid conflict with types defined
* in win32 headers.
*/
static const guint month_length[2][13] =
{
{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
@ -104,102 +95,38 @@ static const guint days_in_months[2][14] =
{ 0, 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
};
static glong calc_days(guint year, guint mm, guint dd);
static guint day_of_week(guint year, guint mm, guint dd);
static glong dates_difference(guint year1, guint mm1, guint dd1,
guint year2, guint mm2, guint dd2);
static guint weeks_in_year(guint year);
static gboolean
leap (guint year)
{
return((((year % 4) == 0) && ((year % 100) != 0)) || ((year % 400) == 0));
return ((((year % 4) == 0) && ((year % 100) != 0)) || ((year % 400) == 0));
}
static guint
day_of_week (guint year, guint mm, guint dd)
{
glong days;
GDateTime *dt;
guint days;
days = calc_days(year, mm, dd);
if (days > 0L)
{
days--;
days %= 7L;
days++;
}
return( (guint) days );
}
dt = g_date_time_new_local (year, mm, dd, 1, 1, 1);
days = g_date_time_get_day_of_week (dt);
g_date_time_unref (dt);
static guint weeks_in_year(guint year)
{
return(52 + ((day_of_week(year,1,1)==4) || (day_of_week(year,12,31)==4)));
}
static gboolean
check_date(guint year, guint mm, guint dd)
{
if (year < 1) return FALSE;
if ((mm < 1) || (mm > 12)) return FALSE;
if ((dd < 1) || (dd > month_length[leap(year)][mm])) return FALSE;
return TRUE;
return days;
}
static guint
week_number(guint year, guint mm, guint dd)
week_of_year (guint year, guint mm, guint dd)
{
guint first;
GDateTime *dt;
guint week;
first = day_of_week(year,1,1) - 1;
return( (guint) ( (dates_difference(year,1,1, year,mm,dd) + first) / 7L ) +
(first < 4) );
dt = g_date_time_new_local (year, mm, dd, 1, 1, 1);
week = g_date_time_get_week_of_year (dt);
g_date_time_unref (dt);
return week;
}
static glong
year_to_days(guint year)
{
return( year * 365L + (year / 4) - (year / 100) + (year / 400) );
}
static glong
calc_days(guint year, guint mm, guint dd)
{
gboolean lp;
if (year < 1) return(0L);
if ((mm < 1) || (mm > 12)) return(0L);
if ((dd < 1) || (dd > month_length[(lp = leap(year))][mm])) return(0L);
return( year_to_days(--year) + days_in_months[lp][mm] + dd );
}
static gboolean
week_of_year(guint *week, guint *year, guint mm, guint dd)
{
if (check_date(*year,mm,dd))
{
*week = week_number(*year,mm,dd);
if (*week == 0)
*week = weeks_in_year(--(*year));
else if (*week > weeks_in_year(*year))
{
*week = 1;
(*year)++;
}
return TRUE;
}
return FALSE;
}
static glong
dates_difference(guint year1, guint mm1, guint dd1,
guint year2, guint mm2, guint dd2)
{
return( calc_days(year2, mm2, dd2) - calc_days(year1, mm1, dd1) );
}
/*** END OF lib_date routines ********************************************/
/* Spacing around day/week headers and main area, inside those windows */
#define CALENDAR_MARGIN 0
@ -1059,9 +986,9 @@ calendar_compute_days (GtkCalendar *calendar)
/* Compute days of previous month */
if (month > 1)
ndays_in_prev_month = month_length[leap (year)][month-1];
ndays_in_prev_month = month_length[leap (year)][month - 1];
else
ndays_in_prev_month = month_length[leap (year)][12];
ndays_in_prev_month = month_length[leap (year - 1)][12];
day = ndays_in_prev_month - first_day + 1;
row = 0;
@ -2434,7 +2361,6 @@ calendar_paint_week_numbers (GtkCalendar *calendar,
GtkCalendarPrivate *priv = calendar->priv;
GtkStyleContext *context;
GtkBorder padding, week_padding;
guint week = 0, year;
gint row, x_loc, y_loc;
gint day_height;
char buffer[32];
@ -2479,16 +2405,25 @@ calendar_paint_week_numbers (GtkCalendar *calendar,
for (row = 0; row < 6; row++)
{
gboolean result;
gint year, month, week;
year = priv->year;
if (priv->day[row][6] < 15 && row > 3 && priv->month == 11)
year++;
month = priv->month + priv->day_month[row][6] - MONTH_CURRENT;
result = week_of_year (&week, &year,
((priv->day[row][6] < 15 && row > 3 ? 1 : 0)
+ priv->month) % 12 + 1, priv->day[row][6]);
g_return_if_fail (result);
if (month < 0)
{
month += 12;
year -= 1;
}
else if (month > 11)
{
month -= 12;
year += 1;
}
month += 1;
week = week_of_year (year, month, priv->day[row][6]);
/* Translators: this defines whether the week numbers should use
* localized digits or the ones used in English (0123...).