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selection: find_word_boundary_right: add “stop-on-space-to-word-boundary”

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When true, selection_find_word_boundary_right() behaves as before - it
stops as soon as it encounters a character that isn’t of the
same *type* as the “initial” character (the last character in the
selection).

Take this, for example:

  The Quick Brown Fox

The selection will first stop at the end of “the”, then just *before*
“quick”, then at the end of “quick”. Then just *before* “brown”, and
then at the end of “brown”, and so on.

This suits mouse selections pretty good. But when
selection_find_word_boundary_right() is used to extend a search match,
it’s better to ignore space-to-word character transitions. That is, we
want

  The Quick Brown Fox

to first extend to the end of “the”, then immediately to the end of
“quick”, then to the end of “brown”, and so on.

Setting the ‘stop_to_space_to_word_boundary’ argument to false results
in latter behavior.

This is now done by search, when executing the
“extend-to-word-boundary” and “extend-to-next-whitespace” key
bindings.
This commit is contained in:
Daniel Eklöf 2022-04-27 18:44:57 +02:00
parent 8356dfac2f
commit 7630510448
No known key found for this signature in database
GPG key ID: 5BBD4992C116573F
3 changed files with 22 additions and 10 deletions
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27
selection.c
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@ -369,7 +369,8 @@ selection_find_word_boundary_left(struct terminal *term, struct coord *pos,
void
selection_find_word_boundary_right(struct terminal *term, struct coord *pos,
bool spaces_only)
bool spaces_only,
bool stop_on_space_to_word_boundary)
{
xassert(pos->row >= 0);
xassert(pos->row < term->rows);
@ -395,6 +396,7 @@ selection_find_word_boundary_right(struct terminal *term, struct coord *pos,
!initial_is_space && !isword(c, spaces_only, term->conf->word_delimiters);
bool initial_is_word =
c != 0 && isword(c, spaces_only, term->conf->word_delimiters);
bool have_seen_word = initial_is_word;
while (true) {
int next_col = pos->col + 1;
@ -435,13 +437,22 @@ selection_find_word_boundary_right(struct terminal *term, struct coord *pos,
bool is_word =
c != 0 && isword(c, spaces_only, term->conf->word_delimiters);
if (initial_is_space && !is_space)
break;
if (initial_is_delim && !is_delim)
break;
if (stop_on_space_to_word_boundary) {
if (initial_is_space && !is_space)
break;
if (initial_is_delim && !is_delim)
break;
} else {
if (initial_is_space && ((have_seen_word && is_space) || is_delim))
break;
if (initial_is_delim && ((have_seen_word && is_delim) || is_space))
break;
}
if (initial_is_word && !is_word)
break;
have_seen_word = is_word;
pos->col = next_col;
pos->row = next_row;
}
@ -522,7 +533,7 @@ selection_start(struct terminal *term, int col, int row,
case SELECTION_WORD_WISE: {
struct coord start = {col, row}, end = {col, row};
selection_find_word_boundary_left(term, &start, spaces_only);
selection_find_word_boundary_right(term, &end, spaces_only);
selection_find_word_boundary_right(term, &end, spaces_only, true);
term->selection.coords.start = (struct coord){
start.col, term->grid->view + start.row};
@ -863,7 +874,7 @@ selection_update(struct terminal *term, int col, int row)
case SELECTION_RIGHT: {
struct coord end = {col, row};
selection_find_word_boundary_right(
term, &end, term->selection.spaces_only);
term, &end, term->selection.spaces_only, true);
new_end = (struct coord){end.col, term->grid->view + end.row};
break;
}
@ -1013,7 +1024,7 @@ selection_extend_normal(struct terminal *term, int col, int row,
struct coord pivot_end = pivot_start;
selection_find_word_boundary_left(term, &pivot_start, spaces_only);
selection_find_word_boundary_right(term, &pivot_end, spaces_only);
selection_find_word_boundary_right(term, &pivot_end, spaces_only, true);
term->selection.pivot.start =
(struct coord){pivot_start.col, term->grid->view + pivot_start.row};