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grid: reflow: calculate width of composed characters correctly

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Before this patch, reflow called `wcwidth()` on our magic values for
composed characters.
This commit is contained in:
Daniel Eklöf 2020-09-06 19:14:46 +02:00
parent f9cbdd3b11
commit 61f950f77a
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GPG key ID: 5BBD4992C116573F
4 changed files with 28 additions and 7 deletions
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24
grid.c
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@ -57,7 +57,9 @@ void
grid_reflow(struct grid *grid, int new_rows, int new_cols,
int old_screen_rows, int new_screen_rows,
size_t tracking_points_count,
struct coord *const _tracking_points[static tracking_points_count])
struct coord *const _tracking_points[static tracking_points_count],
size_t compose_count, const struct
composed composed[static compose_count])
{
struct row *const *old_grid = grid->rows;
const int old_rows = grid->num_rows;
@ -225,19 +227,33 @@ grid_reflow(struct grid *grid, int new_rows, int new_cols,
if (new_cols_left < cols_needed && new_cols_left >= old_cols_left)
empty_count = max(0, empty_count - (cols_needed - new_cols_left));
int width = max(1, wcwidth(old_row->cells[c].wc));
wchar_t wc = old_row->cells[c].wc;
if (wc >= CELL_COMB_CHARS_LO &&
wc < (CELL_COMB_CHARS_LO + compose_count))
{
wc = composed[wc - CELL_COMB_CHARS_LO].base;
}
int width = max(1, wcwidth(wc));
/* Multi-column characters are never cut in half */
assert(c + width <= old_cols);
for (int i = 0; i < empty_count + 1; i++) {
const struct cell *old_cell = &old_row->cells[c - empty_count + i];
wc = old_cell->wc;
if (old_cell->wc == CELL_MULT_COL_SPACER)
if (wc == CELL_MULT_COL_SPACER)
continue;
if (wc >= CELL_COMB_CHARS_LO &&
wc < (CELL_COMB_CHARS_LO + compose_count))
{
wc = composed[wc - CELL_COMB_CHARS_LO].base;
}
/* Out of columns on current row in new grid? */
if (new_col_idx + max(1, wcwidth(old_cell->wc)) > new_cols) {
if (new_col_idx + max(1, wcwidth(wc)) > new_cols) {
/* Pad to end-of-line with spacers, then line-wrap */
for (;new_col_idx < new_cols; new_col_idx++)
print_spacer();