/* Find the leftmost, then topmost, empty area on the workspace
* that can contain the new window.
*
* Cool feature to have: if we can't fit the current window size,
* try shrinking the window (within geometry constraints). But
* beware windows such as Emacs with no sane minimum size, we
* don't want to create a 1x1 Emacs.
*/
static gboolean
find_first_fit (MetaWindow *window,
/* visible windows on relevant workspaces */
GList *windows,
int monitor,
int x,
int y,
int *new_x,
int *new_y)
{
/* This algorithm is limited - it just brute-force tries
* to fit the window in a small number of locations that are aligned
* with existing windows. It tries to place the window on
* the bottom of each existing window, and then to the right
* of each existing window, aligned with the left/top of the
* existing window in each of those cases.
*/
int retval;
GList *below_sorted;
GList *right_sorted;
GList *tmp;
MetaRectangle rect;
MetaRectangle work_area;
retval = FALSE;
/* Below each window */
below_sorted = g_list_copy (windows);
below_sorted = g_list_sort (below_sorted, leftmost_cmp);
below_sorted = g_list_sort (below_sorted, topmost_cmp);
/* To the right of each window */
right_sorted = g_list_copy (windows);
right_sorted = g_list_sort (right_sorted, topmost_cmp);
right_sorted = g_list_sort (right_sorted, leftmost_cmp);
meta_window_get_frame_rect (window, &rect);
#ifdef WITH_VERBOSE_MODE
{
char monitor_location_string[RECT_LENGTH];
meta_rectangle_to_string (&window->screen->monitor_infos[monitor].rect,
monitor_location_string);
meta_topic (META_DEBUG_XINERAMA,
"Natural monitor is %s\n",
monitor_location_string);
}
#endif
meta_window_get_work_area_for_monitor (window, monitor, &work_area);
center_tile_rect_in_area (&rect, &work_area);
if (meta_rectangle_contains_rect (&work_area, &rect) &&
!rectangle_overlaps_some_window (&rect, windows))
{
*new_x = rect.x;
*new_y = rect.y;
retval = TRUE;
goto out;
}
/* try below each window */
tmp = below_sorted;
while (tmp != NULL)
{
MetaWindow *w = tmp->data;
MetaRectangle frame_rect;
meta_window_get_frame_rect (w, &frame_rect);
rect.x = frame_rect.x;
rect.y = frame_rect.y + frame_rect.height;
if (meta_rectangle_contains_rect (&work_area, &rect) &&
!rectangle_overlaps_some_window (&rect, below_sorted))
{
*new_x = rect.x;
*new_y = rect.y;
retval = TRUE;
goto out;
}
tmp = tmp->next;
}
/* try to the right of each window */
tmp = right_sorted;
while (tmp != NULL)
{
MetaWindow *w = tmp->data;
MetaRectangle frame_rect;
meta_window_get_frame_rect (w, &frame_rect);
rect.x = frame_rect.x + frame_rect.width;
rect.y = frame_rect.y;
if (meta_rectangle_contains_rect (&work_area, &rect) &&
!rectangle_overlaps_some_window (&rect, right_sorted))
{
*new_x = rect.x;
*new_y = rect.y;
retval = TRUE;
goto out;
}
tmp = tmp->next;
}
out:
g_list_free (below_sorted);
g_list_free (right_sorted);
return retval;
}
static void
test_merge_regions ()
{
/* logarithmically distributed random number of struts (range?)
* logarithmically distributed random size of struts (up to screen size???)
* uniformly distributed location of center of struts (within screen)
* merge all regions that are possible
* print stats on problem setup
* number of (non-completely-occluded?) struts
* percentage of screen covered
* length of resulting non-minimal spanning set
* length of resulting minimal spanning set
* print stats on merged regions:
* number boxes merged
* number of those merges that were of the form A contains B
* number of those merges that were of the form A partially contains B
* number of those merges that were of the form A is adjacent to B
*/
GList* region;
GList* compare;
int num_contains, num_merged, num_part_contains, num_adjacent;
num_contains = num_merged = num_part_contains = num_adjacent = 0;
compare = region = get_screen_region (2);
g_assert (region);
printf ("Merging stats:\n");
printf (" Length of initial list: %d\n", g_list_length (region));
#ifdef PRINT_DEBUG
char rect1[RECT_LENGTH], rect2[RECT_LENGTH];
char region_list[(RECT_LENGTH + 2) * g_list_length (region)];
meta_rectangle_region_to_string (region, ", ", region_list);
printf (" Initial rectangles: %s\n", region_list);
#endif
while (compare && compare->next)
{
MetaRectangle *a = compare->data;
GList *other = compare->next;
g_assert (a->width > 0 && a->height > 0);
while (other)
{
MetaRectangle *b = other->data;
GList *delete_me = NULL;
g_assert (b->width > 0 && b->height > 0);
#ifdef PRINT_DEBUG
printf (" -- Comparing %s to %s --\n",
meta_rectangle_to_string (a, rect1),
meta_rectangle_to_string (b, rect2));
#endif
/* If a contains b, just remove b */
if (meta_rectangle_contains_rect (a, b))
{
delete_me = other;
num_contains++;
num_merged++;
}
/* If b contains a, just remove a */
else if (meta_rectangle_contains_rect (a, b))
{
delete_me = compare;
num_contains++;
num_merged++;
}
/* If a and b might be mergeable horizontally */
else if (a->y == b->y && a->height == b->height)
{
/* If a and b overlap */
if (meta_rectangle_overlap (a, b))
{
int new_x = MIN (a->x, b->x);
a->width = MAX (a->x + a->width, b->x + b->width) - new_x;
a->x = new_x;
delete_me = other;
num_part_contains++;
num_merged++;
}
/* If a and b are adjacent */
else if (a->x + a->width == b->x || a->x == b->x + b->width)
{
int new_x = MIN (a->x, b->x);
a->width = MAX (a->x + a->width, b->x + b->width) - new_x;
a->x = new_x;
delete_me = other;
num_adjacent++;
num_merged++;
}
}
/* If a and b might be mergeable vertically */
else if (a->x == b->x && a->width == b->width)
{
/* If a and b overlap */
if (meta_rectangle_overlap (a, b))
{
int new_y = MIN (a->y, b->y);
a->height = MAX (a->y + a->height, b->y + b->height) - new_y;
a->y = new_y;
delete_me = other;
num_part_contains++;
num_merged++;
}
/* If a and b are adjacent */
else if (a->y + a->height == b->y || a->y == b->y + b->height)
{
int new_y = MIN (a->y, b->y);
a->height = MAX (a->y + a->height, b->y + b->height) - new_y;
a->y = new_y;
delete_me = other;
num_adjacent++;
num_merged++;
}
}
other = other->next;
/* Delete any rectangle in the list that is no longer wanted */
if (delete_me != NULL)
{
#ifdef PRINT_DEBUG
MetaRectangle *bla = delete_me->data;
printf (" Deleting rect %s\n",
meta_rectangle_to_string (bla, rect1));
#endif
/* Deleting the rect we're compare others to is a little tricker */
if (compare == delete_me)
{
compare = compare->next;
other = compare->next;
a = compare->data;
}
/* Okay, we can free it now */
g_free (delete_me->data);
region = g_list_delete_link (region, delete_me);
}
#ifdef PRINT_DEBUG
char region_list[(RECT_LENGTH + 2) * g_list_length (region)];
meta_rectangle_region_to_string (region, ", ", region_list);
printf (" After comparison, new list is: %s\n", region_list);
#endif
}
compare = compare->next;
}
printf (" Num rectangles contained in others : %d\n",
num_contains);
printf (" Num rectangles partially contained in others: %d\n",
num_part_contains);
printf (" Num rectangles adjacent to others : %d\n",
num_adjacent);
printf (" Num rectangles merged with others : %d\n",
num_merged);
#ifdef PRINT_DEBUG
char region_list2[(RECT_LENGTH + 2) * g_list_length (region)];
meta_rectangle_region_to_string (region, ", ", region_list2);
printf (" Final rectangles: %s\n", region_list2);
#endif
meta_rectangle_free_spanning_set (region);
region = NULL;
printf ("%s passed.\n", G_STRFUNC);
}