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grid: don't pre-allocate the entire grid (with all scrollback lines)

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The row array may now contain NULL pointers. This means the
corresponding row hasn't yet been allocated and initialized.

On a resize, we explicitly allocate the visible rows.

Uninitialized rows are then allocated the first time they are
referenced.
This commit is contained in:
Daniel Eklöf 2019-07-10 16:27:55 +02:00
parent 8f0d574dcb
commit 1ff1b3a71e
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GPG key ID: 5BBD4992C116573F
7 changed files with 68 additions and 45 deletions
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terminal.c
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@ -169,7 +169,6 @@ term_scroll_partial(struct terminal *term, struct scroll_region region, int rows
for (int r = max(region.end - rows, 0); r < region.end; r++) {
struct row *row = grid_row(term->grid, r);
erase_line(term, row);
row->initialized = true;
}
term_damage_scroll(term, DAMAGE_SCROLL, region, rows);