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selection: add start/end coordinate getters

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Internally, selection coordinates are *unbounded* (that is, the row
numbers may be larger than grid->num_rows) while a selection is
ongoing. Only after it has been finalized are the coordinates bounded.

This means it isn’t safe to use term->selection.coords.* directly.
This commit is contained in:
Daniel Eklöf 2022-04-25 19:59:23 +02:00
parent b4f666118f
commit 6316a5eb0c
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GPG key ID: 5BBD4992C116573F
2 changed files with 27 additions and 0 deletions
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24
selection.c
View file

@ -38,6 +38,29 @@ static const char *const mime_type_map[] = {
[DATA_OFFER_MIME_TEXT_UTF8_STRING] = "UTF8_STRING",
};
static inline struct coord
bounded(const struct grid *grid, struct coord coord)
{
coord.row &= grid->num_rows - 1;
return coord;
}
struct coord
selection_get_start(const struct terminal *term)
{
if (term->selection.coords.start.row < 0)
return term->selection.coords.start;
return bounded(term->grid, term->selection.coords.start);
}
struct coord
selection_get_end(const struct terminal *term)
{
if (term->selection.coords.end.row < 0)
return term->selection.coords.end;
return bounded(term->grid, term->selection.coords.end);
}
bool
selection_on_rows(const struct terminal *term, int row_start, int row_end)
{
@ -2461,3 +2484,4 @@ const struct zwp_primary_selection_device_v1_listener primary_selection_device_l
.data_offer = &primary_data_offer,
.selection = &primary_selection,
};

3
selection.h
View file

@ -79,3 +79,6 @@ void selection_find_word_boundary_left(
struct terminal *term, struct coord *pos, bool spaces_only);
void selection_find_word_boundary_right(
struct terminal *term, struct coord *pos, bool spaces_only);
struct coord selection_get_start(const struct terminal *term);
struct coord selection_get_end(const struct terminal *term);