traxys/tree-sitter
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Update trees' offsets when editing them

Browse source
This commit is contained in:
Max Brunsfeld 2016-09-08 17:54:51 -07:00
parent 131bbee160
commit 591fcc980c
3 changed files with 39 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

19
src/runtime/tree.c
View file

@ -335,37 +335,38 @@ void ts_tree_edit(TSTree *self, TSInputEdit edit) {
bool found_first_child = false;
long remainder_to_delete = edit.chars_removed - edit.chars_inserted;
size_t child_left = 0, child_right = 0;
TSLength child_left, child_right = ts_length_zero();
for (size_t i = 0; i < self->child_count; i++) {
TSTree *child = self->children[i];
size_t child_size = ts_tree_total_chars(child);
child_left = child_right;
child_right += child_size;
if (!found_first_child) {
if (child_right >= start) {
child_right = ts_length_add(child_left, ts_tree_total_size(child));
if (child_right.chars >= start) {
found_first_child = true;
size_t chars_removed = min(edit.chars_removed, child_right - start);
size_t chars_removed = min(edit.chars_removed, child_right.chars - start);
remainder_to_delete -= (chars_removed - edit.chars_inserted);
ts_tree_edit(child, (TSInputEdit){
.position = start - child_left,
.position = start - child_left.chars,
.chars_inserted = edit.chars_inserted,
.chars_removed = chars_removed,
});
child_right = ts_length_add(child_left, ts_tree_total_size(child));
}
} else {
if (remainder_to_delete > 0) {
size_t chars_removed = min(remainder_to_delete, child_size);
size_t chars_removed = min(remainder_to_delete, ts_tree_total_chars(child));
remainder_to_delete -= chars_removed;
ts_tree_edit(
child,
(TSInputEdit){
.position = 0, .chars_inserted = 0, .chars_removed = chars_removed,
});
} else {
break;
}
child_right = ts_length_add(child_right, ts_tree_total_size(child));
}
child->context.offset = child_left;
}
}