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-rw-r--r--calendar/gui/e-week-view-layout.c426
1 files changed, 0 insertions, 426 deletions
diff --git a/calendar/gui/e-week-view-layout.c b/calendar/gui/e-week-view-layout.c
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--- a/calendar/gui/e-week-view-layout.c
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-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
-
-/*
- * Author :
- * Damon Chaplin <damon@ximian.com>
- *
- * Copyright 2001, Ximian, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * 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
- */
-
-/*
- * Lays out events for the Week & Month views of the calendar. It is also
- * used for printing.
- */
-
-#include <config.h>
-
-#include "e-week-view-layout.h"
-
-
-static void e_week_view_layout_event (EWeekViewEvent *event,
- guint8 *grid,
- GArray *spans,
- GArray *old_spans,
- gboolean multi_week_view,
- gint weeks_shown,
- gboolean compress_weekend,
- gint start_weekday,
- time_t *day_starts,
- gint *rows_per_day);
-static gint e_week_view_find_day (time_t time_to_find,
- gboolean include_midnight_in_prev_day,
- gint days_shown,
- time_t *day_starts);
-static gint e_week_view_find_span_end (gboolean multi_week_view,
- gboolean compress_weekend,
- gint display_start_day,
- gint day);
-
-
-GArray*
-e_week_view_layout_events (GArray *events,
- GArray *old_spans,
- gboolean multi_week_view,
- gint weeks_shown,
- gboolean compress_weekend,
- gint start_weekday,
- time_t *day_starts,
- gint *rows_per_day)
-{
- EWeekViewEvent *event;
- EWeekViewEventSpan *span;
- gint num_days, day, event_num, span_num;
- guint8 *grid;
- GArray *spans;
-
- /* This is a temporary 2-d grid which is used to place events.
- Each element is 0 if the position is empty, or 1 if occupied.
- We allocate the maximum size possible here, assuming that each
- event will need its own row. */
- grid = g_new0 (guint8, E_WEEK_VIEW_MAX_ROWS_PER_CELL * 7
- * E_WEEK_VIEW_MAX_WEEKS);
-
- /* We create a new array of spans, which will replace the old one. */
- spans = g_array_new (FALSE, FALSE, sizeof (EWeekViewEventSpan));
-
- /* Clear the number of rows used per day. */
- num_days = multi_week_view ? weeks_shown * 7 : 7;
- for (day = 0; day <= num_days; day++) {
- rows_per_day[day] = 0;
- }
-
- /* Iterate over the events, finding which weeks they cover, and putting
- them in the first free row available. */
- for (event_num = 0; event_num < events->len; event_num++) {
- event = &g_array_index (events, EWeekViewEvent, event_num);
- e_week_view_layout_event (event, grid, spans, old_spans,
- multi_week_view,
- weeks_shown, compress_weekend,
- start_weekday, day_starts,
- rows_per_day);
- }
-
- /* Free the grid. */
- g_free (grid);
-
- /* Destroy the old spans array, destroying any unused canvas items. */
- if (old_spans) {
- for (span_num = 0; span_num < old_spans->len; span_num++) {
- span = &g_array_index (old_spans, EWeekViewEventSpan,
- span_num);
- if (span->background_item)
- gtk_object_destroy (GTK_OBJECT (span->background_item));
- if (span->text_item)
- gtk_object_destroy (GTK_OBJECT (span->text_item));
- }
- g_array_free (old_spans, TRUE);
- }
-
- return spans;
-}
-
-
-static void
-e_week_view_layout_event (EWeekViewEvent *event,
- guint8 *grid,
- GArray *spans,
- GArray *old_spans,
- gboolean multi_week_view,
- gint weeks_shown,
- gboolean compress_weekend,
- gint start_weekday,
- time_t *day_starts,
- gint *rows_per_day)
-{
- gint start_day, end_day, span_start_day, span_end_day, rows_per_cell;
- gint free_row, row, day, span_num, spans_index, num_spans, days_shown;
- EWeekViewEventSpan span, *old_span;
-
- days_shown = multi_week_view ? weeks_shown * 7 - 1 : 7 - 1;
- start_day = e_week_view_find_day (event->start, FALSE, days_shown,
- day_starts);
- end_day = e_week_view_find_day (event->end, TRUE, days_shown,
- day_starts);
- start_day = CLAMP (start_day, 0, days_shown - 1);
- end_day = CLAMP (end_day, 0, days_shown - 1);
-
-#if 0
- g_print ("In e_week_view_layout_event Start:%i End: %i\n",
- start_day, end_day);
-#endif
-
- /* Iterate through each of the spans of the event, where each span
- is a sequence of 1 or more days displayed next to each other. */
- span_start_day = start_day;
- rows_per_cell = E_WEEK_VIEW_MAX_ROWS_PER_CELL;
- span_num = 0;
- spans_index = spans->len;
- num_spans = 0;
- while (span_start_day <= end_day) {
- span_end_day = e_week_view_find_span_end (multi_week_view,
- compress_weekend,
- start_weekday,
- span_start_day);
- span_end_day = MIN (span_end_day, end_day);
-#if 0
- g_print (" Span start:%i end:%i\n", span_start_day,
- span_end_day);
-#endif
- /* Try each row until we find a free one or we fall off the
- bottom of the available rows. */
- row = 0;
- free_row = -1;
- while (free_row == -1 && row < rows_per_cell) {
- free_row = row;
- for (day = span_start_day; day <= span_end_day;
- day++) {
- if (grid[day * rows_per_cell + row]) {
- free_row = -1;
- break;
- }
- }
- row++;
- };
-
- if (free_row != -1) {
- /* Mark the cells as full. */
- for (day = span_start_day; day <= span_end_day;
- day++) {
- grid[day * rows_per_cell + free_row] = 1;
- rows_per_day[day] = MAX (rows_per_day[day],
- free_row + 1);
- }
-#if 0
- g_print (" Span start:%i end:%i row:%i\n",
- span_start_day, span_end_day, free_row);
-#endif
- /* Add the span to the array, and try to reuse any
- canvas items from the old spans. */
- span.start_day = span_start_day;
- span.num_days = span_end_day - span_start_day + 1;
- span.row = free_row;
- span.background_item = NULL;
- span.text_item = NULL;
- if (event->num_spans > span_num) {
- old_span = &g_array_index (old_spans, EWeekViewEventSpan, event->spans_index + span_num);
- span.background_item = old_span->background_item;
- span.text_item = old_span->text_item;
- old_span->background_item = NULL;
- old_span->text_item = NULL;
- }
-
- g_array_append_val (spans, span);
- num_spans++;
- }
-
- span_start_day = span_end_day + 1;
- span_num++;
- }
-
- /* Set the event's spans. */
- event->spans_index = spans_index;
- event->num_spans = num_spans;
-}
-
-
-/* Finds the day containing the given time.
- If include_midnight_in_prev_day is TRUE then if the time exactly
- matches the start of a day the previous day is returned. This is useful
- when calculating the end day of an event. */
-static gint
-e_week_view_find_day (time_t time_to_find,
- gboolean include_midnight_in_prev_day,
- gint days_shown,
- time_t *day_starts)
-{
- gint day;
-
- if (time_to_find < day_starts[0])
- return -1;
- if (time_to_find > day_starts[days_shown])
- return days_shown;
-
- for (day = 1; day <= days_shown; day++) {
- if (time_to_find <= day_starts[day]) {
- if (time_to_find == day_starts[day]
- && !include_midnight_in_prev_day)
- return day;
- return day - 1;
- }
- }
-
- g_assert_not_reached ();
- return days_shown;
-}
-
-
-/* This returns the last possible day in the same span as the given day.
- A span is all the days which are displayed next to each other from left to
- right. In the week view all spans are only 1 day, since Tuesday is below
- Monday rather than beside it etc. In the month view, if the weekends are not
- compressed then each week is a span, otherwise we have to break a span up
- on Saturday, use a separate span for Sunday, and start again on Monday. */
-static gint
-e_week_view_find_span_end (gboolean multi_week_view,
- gboolean compress_weekend,
- gint display_start_day,
- gint day)
-{
- gint week, col, sat_col, end_col;
-
- if (multi_week_view) {
- week = day / 7;
- col = day % 7;
-
- /* We default to the last column in the row. */
- end_col = 6;
-
- /* If the weekend is compressed we must end any spans on
- Saturday and Sunday. */
- if (compress_weekend) {
- sat_col = (5 + 7 - display_start_day) % 7;
- if (col <= sat_col)
- end_col = sat_col;
- else if (col == sat_col + 1)
- end_col = sat_col + 1;
- }
-
- return week * 7 + end_col;
- } else {
- return day;
- }
-}
-
-
-void
-e_week_view_layout_get_day_position (gint day,
- gboolean multi_week_view,
- gint weeks_shown,
- gint display_start_day,
- gboolean compress_weekend,
- gint *day_x,
- gint *day_y,
- gint *rows)
-{
- gint week, day_of_week, row, col, weekend_col, box, weekend_box;
-
- *day_x = *day_y = *rows = 0;
- g_return_if_fail (day >= 0);
-
- if (multi_week_view) {
- g_return_if_fail (day < weeks_shown * 7);
-
- week = day / 7;
- col = day % 7;
- day_of_week = (display_start_day + day) % 7;
- if (compress_weekend && day_of_week >= 5) {
- /* In the compressed view Saturday is above Sunday and
- both have just one row as opposed to 2 for all the
- other days. */
- if (day_of_week == 5) {
- *day_y = week * 2;
- *rows = 1;
- } else {
- *day_y = week * 2 + 1;
- *rows = 1;
- col--;
- }
- /* Both Saturday and Sunday are in the same column. */
- *day_x = col;
- } else {
- /* If the weekend is compressed and the day is after
- the weekend we have to move back a column. */
- if (compress_weekend) {
- /* Calculate where the weekend column is.
- Note that 5 is Saturday. */
- weekend_col = (5 + 7 - display_start_day) % 7;
- if (col > weekend_col)
- col--;
- }
-
- *day_y = week * 2;
- *rows = 2;
- *day_x = col;
- }
- } else {
- g_return_if_fail (day < 7);
-
- /* Calculate which box to place the day in, from 0-5.
- Note that in the week view the weekends are always
- compressed and share a box. */
- box = day;
- day_of_week = (display_start_day + day) % 7;
- weekend_box = (5 + 7 - display_start_day) % 7;
- if (box > weekend_box)
- box--;
-
- if (box < 3)
- *day_x = 0;
- else
- *day_x = 1;
-
- row = (box % 3) * 2;
- if (day_of_week < 5) {
- *day_y = row;
- *rows = 2;
- } else if (day_of_week == 5) {
- /* Saturday. */
- *day_y = row;
- *rows = 1;
-
- } else {
- /* Sunday. */
- *day_y = row + 1;
- *rows = 1;
- }
- }
-}
-
-
-/* Returns TRUE if the event span is visible or FALSE if it isn't.
- It also returns the number of days of the span that are visible.
- Usually this can easily be determined by the start & end days and row of
- the span, which are set in e_week_view_layout_event(). Though we need a
- special case for the weekends when they are compressed, since the span may
- not fit. */
-gboolean
-e_week_view_layout_get_span_position (EWeekViewEvent *event,
- EWeekViewEventSpan *span,
- gint rows_per_cell,
- gint rows_per_compressed_cell,
- gint display_start_day,
- gboolean multi_week_view,
- gboolean compress_weekend,
- gint *span_num_days)
-{
- gint end_day_of_week;
-
- if (span->row >= rows_per_cell)
- return FALSE;
-
- end_day_of_week = (display_start_day + span->start_day
- + span->num_days - 1) % 7;
- *span_num_days = span->num_days;
- /* Check if the row will not be visible in compressed cells. */
- if (span->row >= rows_per_compressed_cell) {
- if (multi_week_view) {
- if (compress_weekend) {
- /* If it ends on a Saturday and is 1 day long
- we skip it, else we shorten it. If it ends
- on a Sunday it must be 1 day long and we
- skip it. */
- if (end_day_of_week == 5) { /* Sat */
- if (*span_num_days == 1) {
- return FALSE;
- } else {
- (*span_num_days)--;
- }
- } else if (end_day_of_week == 6) { /* Sun */
- return FALSE;
- }
- }
- } else {
- /* All spans are 1 day long in the week view, so we
- just skip it. */
- if (end_day_of_week > 4)
- return FALSE;
- }
- }
-
- return TRUE;
-}
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