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#include "tile.h"
/************************************************************
Tile growth functions:
Modify tile->min, tile->max, possibly min and max for tile's
siblings.
After these functions, every visible tile will have the _size_
which we want, but the tiles may not abutt, and may not fit into
tile->up. We rely on list_reshaped to tidy these things up.
************************************************************/
/* grow tile a little */
static void
gsome(Tile*tile) {
tile->min -= tile->base*2;
tile->max += tile->base*2;
}
/* grow tile lots */
static void
gmost(Tile*tile) {
Tile *t, *up = tile->up;
int space = 0; /* space either above or below 'tile' */
for (t = up->down; t; t=t->right) {
if (t != tile) {
space += t->base;
t->max = t->min + t->base;
} else {
t->min = space + up->cmin;
space = 0; /* start counting space _above_ tile */
}
}
tile->max = up->cmax - space;
}
/* grow tile way lots */
static void
gall(Tile *tile) {
Tile *t, *up = tile->up;
for (t = up->down; t; t=t->right) {
if (t != tile)
t->ishidden = true;
}
tile->min = up->cmin;
tile->max = up->cmax;
}
/************************************************************
End of Tile growth functions:
************************************************************/
/* Grow 'tile' by some amount */
void
tile_grow(Tile *tile, int buttons) {
assert(list_invariant(tile->up));
list_unhide(tile->up);
/*
Adjust the placement of tile, and possibly tile's siblings.
Don't worry too much about placing them.
Relies on list_reshaped to do the placement and redisplay.
*/
switch (buttons) {
case 1: gsome(tile); break;
case 2: gmost(tile); break;
case 4: gall(tile); break;
default: gsome(tile); break;
}
list_reshaped(tile->up, tile);
assert(list_invariant(tile->up));
}
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