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scrolling: initial reverse scrolling support - no scroll regions

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Daniel Eklöf 2019-07-03 10:45:49 +02:00
parent 048f619b19
commit a7a28ff581
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GPG key ID: 5BBD4992C116573F
4 changed files with 47 additions and 51 deletions
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19
main.c
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@ -118,10 +118,19 @@ grid_render_update(struct context *c, struct buffer *buf, const struct damage *d
row += col == 0 ? 1 : 0)
{
//LOG_DBG("UPDATE: %d (%dx%d)", linear_cursor, row, col);
assert(row >= 0);
assert(row < c->term.rows);
assert(col >= 0);
assert(col < c->term.cols);
const struct cell *cell
= &c->term.grid->cells[linear_cursor % c->term.grid->size];
int cell_idx = linear_cursor % c->term.grid->size;
if (cell_idx < 0)
cell_idx += c->term.grid->size;
assert(cell_idx >= 0);
assert(cell_idx < c->term.rows * c->term.cols);
const struct cell *cell = &c->term.grid->cells[cell_idx];
/* Cursor here? */
bool has_cursor
@ -376,7 +385,7 @@ grid_render_scroll_reverse(struct context *c, struct buffer *buf,
struct damage erase = {
.type = DAMAGE_ERASE,
.range = {
.start = dmg->scroll.region.start * cols,
.start = c->term.grid->offset + dmg->scroll.region.start * cols,
.length = min(dmg->scroll.region.end - dmg->scroll.region.start,
dmg->scroll.lines) * cols,
},
@ -461,6 +470,8 @@ grid_render(struct context *c)
last_cursor = c->term.grid->offset + c->term.cursor.linear;
c->term.grid->offset %= c->term.grid->size;
if (c->term.grid->offset < 0)
c->term.grid->offset += c->term.grid->size;
//cairo_surface_flush(buf->cairo_surface);
wl_surface_attach(c->wl.surface, buf->wl_buf, 0, 0);