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-rw-r--r--calendar/gnome-month-item.c140
-rw-r--r--calendar/gui/gnome-month-item.c140
-rw-r--r--calendar/gui/month-view.c5
-rw-r--r--calendar/month-view.c5
4 files changed, 254 insertions, 36 deletions
diff --git a/calendar/gnome-month-item.c b/calendar/gnome-month-item.c
index 0f5aea462c..f5e3a5b8df 100644
--- a/calendar/gnome-month-item.c
+++ b/calendar/gnome-month-item.c
@@ -44,7 +44,9 @@ static int sept_1752[42] = {
#define REFORMATION_DAY 639787 /* First day of the reformation, counted from 1 Jan 1 */
#define MISSING_DAYS 11 /* They corrected out 11 days */
#define THURSDAY 4 /* First day of reformation */
-#define SATURDAY 6
+#define SATURDAY 6 /* Offset value; 1 Jan 1 was a Saturday */
+#define SEPT_1752_START 2 /* Start day within month */
+#define SEPT_1752_END 20 /* End day within month */
enum {
@@ -313,21 +315,136 @@ create_headings (GnomeMonthItem *mitem)
}
}
+/* Returns the number of leap years since year 1 up to (but not including) the specified year */
+static int
+leap_years_up_to (int year)
+{
+ return (year / 4 /* trivial leapness */
+ - ((year > 1700) ? (year / 100 - 17) : 0) /* minus centuries since 1700 */
+ + ((year > 1600) ? ((year - 1600) / 400) : 0)); /* plus centuries since 1700 divisible by 400 */
+}
+
+/* Returns whether the specified year is a leap year */
+static int
+is_leap_year (int year)
+{
+ if (year <= 1752)
+ return !(year % 4);
+ else
+ return (!(year % 4) && (year % 100)) || !(year % 400);
+}
+
+/* Returns the 1-based day number within the year of the specified date */
+static int
+day_in_year (int day, int month, int year)
+{
+ int is_leap, i;
+
+ is_leap = is_leap_year (year);
+
+ for (i = 0; i < month; i++)
+ day += days_in_month [is_leap][i];
+
+ return day;
+}
+
+/* Returns the day of the week (zero-based, zero is Sunday) for the specified date. For the days
+ * that were removed on the Gregorian reformation, it returns Thursday.
+ */
+static int
+day_in_week (int day, int month, int year)
+{
+ int n;
+
+ n = (year - 1) * 365 + leap_years_up_to (year - 1) + day_in_year (day, month, year);
+
+ if (n < REFORMATION_DAY)
+ return (n - 1 + SATURDAY) % 7;
+
+ if (n >= (REFORMATION_DAY + MISSING_DAYS))
+ return (n - 1 + SATURDAY - MISSING_DAYS) % 7;
+
+ return THURSDAY;
+}
+
+/* Fills the 42-element days array with the day numbers for the specified month. Slots outside the
+ * bounds of the month are filled with zeros. The starting and ending indexes of the days are
+ * returned in the start and end arguments.
+ */
+static void
+build_month (int month, int year, int *days, int *start, int *end)
+{
+ int i;
+ int d_month, d_week;
+
+ /* Note that months are zero-based, so September is month 8 */
+
+ if ((year == 1752) && (month == 8)) {
+ memcpy (days, sept_1752, 42 * sizeof (int));
+
+ if (start)
+ *start = SEPT_1752_START;
+
+ if (end)
+ *end = SEPT_1752_END;
+
+ return;
+ }
+
+ for (i = 0; i < 42; i++)
+ days[i] = 0;
+
+ d_month = days_in_month[is_leap_year (year)][month];
+ d_week = day_in_week (1, month, year);
+
+ for (i = 0; i < d_month; i++)
+ days[d_week + i] = i + 1;
+
+ if (start)
+ *start = d_week;
+
+ if (end)
+ *end = d_week + d_month - 1;
+}
+
/* Set the day numbers in the monthly calendar */
static void
set_days (GnomeMonthItem *mitem)
{
- int i;
+ int i, ofs;
+ int days[42];
+ int start, end;
char buf[100];
- /* FIXME: actually calculate the numbers */
+ build_month (mitem->month, mitem->year, days, &start, &end);
- for (i = 0; i < 42; i++) {
- sprintf (buf, "%d", i);
+ if (mitem->start_on_monday)
+ ofs = (start + 6) % 7;
+ else
+ ofs = start;
+
+ /* Clear days before start of month */
+
+ for (i = 0; i < ofs; i++)
+ gnome_canvas_item_set (mitem->items[ITEM_DAY_LABEL + i],
+ "text", NULL,
+ NULL);
+
+ /* Set days of month */
+
+ for (; start <= end; start++, i++) {
+ sprintf (buf, "%d", days[start]);
gnome_canvas_item_set (mitem->items[ITEM_DAY_LABEL + i],
"text", buf,
NULL);
}
+
+ /* Clear days after end of month */
+
+ for (; i < 42; i++)
+ gnome_canvas_item_set (mitem->items[ITEM_DAY_LABEL + i],
+ "text", NULL,
+ NULL);
}
/* Creates the items for the days */
@@ -369,16 +486,6 @@ create_days (GnomeMonthItem *mitem)
set_days (mitem);
}
-/* Returns a normalized day index (as in sunday to saturday) based on a visible day index */
-static int
-get_day_index (GnomeMonthItem *mitem, int draw_index)
-{
- if (mitem->start_on_monday)
- return (draw_index + 1) % 7;
- else
- return draw_index;
-}
-
/* Resets the text of the day name headings */
static void
set_day_names (GnomeMonthItem *mitem)
@@ -387,7 +494,7 @@ set_day_names (GnomeMonthItem *mitem)
for (i = 0; i < 7; i++)
gnome_canvas_item_set (mitem->items[ITEM_HEAD_LABEL + i],
- "text", mitem->day_names[get_day_index (mitem, i)],
+ "text", mitem->day_names[mitem->start_on_monday ? ((i + 1) % 7) : i],
NULL);
}
@@ -660,6 +767,7 @@ gnome_month_item_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
case ARG_START_ON_MONDAY:
mitem->start_on_monday = GTK_VALUE_BOOL (*arg);
set_day_names (mitem);
+ set_days (mitem);
break;
default:
diff --git a/calendar/gui/gnome-month-item.c b/calendar/gui/gnome-month-item.c
index 0f5aea462c..f5e3a5b8df 100644
--- a/calendar/gui/gnome-month-item.c
+++ b/calendar/gui/gnome-month-item.c
@@ -44,7 +44,9 @@ static int sept_1752[42] = {
#define REFORMATION_DAY 639787 /* First day of the reformation, counted from 1 Jan 1 */
#define MISSING_DAYS 11 /* They corrected out 11 days */
#define THURSDAY 4 /* First day of reformation */
-#define SATURDAY 6
+#define SATURDAY 6 /* Offset value; 1 Jan 1 was a Saturday */
+#define SEPT_1752_START 2 /* Start day within month */
+#define SEPT_1752_END 20 /* End day within month */
enum {
@@ -313,21 +315,136 @@ create_headings (GnomeMonthItem *mitem)
}
}
+/* Returns the number of leap years since year 1 up to (but not including) the specified year */
+static int
+leap_years_up_to (int year)
+{
+ return (year / 4 /* trivial leapness */
+ - ((year > 1700) ? (year / 100 - 17) : 0) /* minus centuries since 1700 */
+ + ((year > 1600) ? ((year - 1600) / 400) : 0)); /* plus centuries since 1700 divisible by 400 */
+}
+
+/* Returns whether the specified year is a leap year */
+static int
+is_leap_year (int year)
+{
+ if (year <= 1752)
+ return !(year % 4);
+ else
+ return (!(year % 4) && (year % 100)) || !(year % 400);
+}
+
+/* Returns the 1-based day number within the year of the specified date */
+static int
+day_in_year (int day, int month, int year)
+{
+ int is_leap, i;
+
+ is_leap = is_leap_year (year);
+
+ for (i = 0; i < month; i++)
+ day += days_in_month [is_leap][i];
+
+ return day;
+}
+
+/* Returns the day of the week (zero-based, zero is Sunday) for the specified date. For the days
+ * that were removed on the Gregorian reformation, it returns Thursday.
+ */
+static int
+day_in_week (int day, int month, int year)
+{
+ int n;
+
+ n = (year - 1) * 365 + leap_years_up_to (year - 1) + day_in_year (day, month, year);
+
+ if (n < REFORMATION_DAY)
+ return (n - 1 + SATURDAY) % 7;
+
+ if (n >= (REFORMATION_DAY + MISSING_DAYS))
+ return (n - 1 + SATURDAY - MISSING_DAYS) % 7;
+
+ return THURSDAY;
+}
+
+/* Fills the 42-element days array with the day numbers for the specified month. Slots outside the
+ * bounds of the month are filled with zeros. The starting and ending indexes of the days are
+ * returned in the start and end arguments.
+ */
+static void
+build_month (int month, int year, int *days, int *start, int *end)
+{
+ int i;
+ int d_month, d_week;
+
+ /* Note that months are zero-based, so September is month 8 */
+
+ if ((year == 1752) && (month == 8)) {
+ memcpy (days, sept_1752, 42 * sizeof (int));
+
+ if (start)
+ *start = SEPT_1752_START;
+
+ if (end)
+ *end = SEPT_1752_END;
+
+ return;
+ }
+
+ for (i = 0; i < 42; i++)
+ days[i] = 0;
+
+ d_month = days_in_month[is_leap_year (year)][month];
+ d_week = day_in_week (1, month, year);
+
+ for (i = 0; i < d_month; i++)
+ days[d_week + i] = i + 1;
+
+ if (start)
+ *start = d_week;
+
+ if (end)
+ *end = d_week + d_month - 1;
+}
+
/* Set the day numbers in the monthly calendar */
static void
set_days (GnomeMonthItem *mitem)
{
- int i;
+ int i, ofs;
+ int days[42];
+ int start, end;
char buf[100];
- /* FIXME: actually calculate the numbers */
+ build_month (mitem->month, mitem->year, days, &start, &end);
- for (i = 0; i < 42; i++) {
- sprintf (buf, "%d", i);
+ if (mitem->start_on_monday)
+ ofs = (start + 6) % 7;
+ else
+ ofs = start;
+
+ /* Clear days before start of month */
+
+ for (i = 0; i < ofs; i++)
+ gnome_canvas_item_set (mitem->items[ITEM_DAY_LABEL + i],
+ "text", NULL,
+ NULL);
+
+ /* Set days of month */
+
+ for (; start <= end; start++, i++) {
+ sprintf (buf, "%d", days[start]);
gnome_canvas_item_set (mitem->items[ITEM_DAY_LABEL + i],
"text", buf,
NULL);
}
+
+ /* Clear days after end of month */
+
+ for (; i < 42; i++)
+ gnome_canvas_item_set (mitem->items[ITEM_DAY_LABEL + i],
+ "text", NULL,
+ NULL);
}
/* Creates the items for the days */
@@ -369,16 +486,6 @@ create_days (GnomeMonthItem *mitem)
set_days (mitem);
}
-/* Returns a normalized day index (as in sunday to saturday) based on a visible day index */
-static int
-get_day_index (GnomeMonthItem *mitem, int draw_index)
-{
- if (mitem->start_on_monday)
- return (draw_index + 1) % 7;
- else
- return draw_index;
-}
-
/* Resets the text of the day name headings */
static void
set_day_names (GnomeMonthItem *mitem)
@@ -387,7 +494,7 @@ set_day_names (GnomeMonthItem *mitem)
for (i = 0; i < 7; i++)
gnome_canvas_item_set (mitem->items[ITEM_HEAD_LABEL + i],
- "text", mitem->day_names[get_day_index (mitem, i)],
+ "text", mitem->day_names[mitem->start_on_monday ? ((i + 1) % 7) : i],
NULL);
}
@@ -660,6 +767,7 @@ gnome_month_item_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
case ARG_START_ON_MONDAY:
mitem->start_on_monday = GTK_VALUE_BOOL (*arg);
set_day_names (mitem);
+ set_days (mitem);
break;
default:
diff --git a/calendar/gui/month-view.c b/calendar/gui/month-view.c
index 18e96cbf26..4b96aa4bcb 100644
--- a/calendar/gui/month-view.c
+++ b/calendar/gui/month-view.c
@@ -65,6 +65,9 @@ month_view_init (MonthView *mv)
"y", 0.0,
"anchor", GTK_ANCHOR_NW,
"day_anchor", GTK_ANCHOR_NE,
+
+ "start_on_monday", TRUE,
+
NULL);
}
@@ -111,10 +114,8 @@ month_view_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
(* GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation);
gnome_canvas_set_scroll_region (GNOME_CANVAS (mv), 0, 0, allocation->width, allocation->height);
-#if 0
gnome_canvas_item_set (mv->mitem,
"width", (double) allocation->width,
"height", (double) allocation->height,
NULL);
-#endif
}
diff --git a/calendar/month-view.c b/calendar/month-view.c
index 18e96cbf26..4b96aa4bcb 100644
--- a/calendar/month-view.c
+++ b/calendar/month-view.c
@@ -65,6 +65,9 @@ month_view_init (MonthView *mv)
"y", 0.0,
"anchor", GTK_ANCHOR_NW,
"day_anchor", GTK_ANCHOR_NE,
+
+ "start_on_monday", TRUE,
+
NULL);
}
@@ -111,10 +114,8 @@ month_view_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
(* GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation);
gnome_canvas_set_scroll_region (GNOME_CANVAS (mv), 0, 0, allocation->width, allocation->height);
-#if 0
gnome_canvas_item_set (mv->mitem,
"width", (double) allocation->width,
"height", (double) allocation->height,
NULL);
-#endif
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 01:48:03 +0800