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Collapse nodes with only one child and no additional text content

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This commit is contained in:
Max Brunsfeld 2014-03-26 00:10:59 -07:00
parent 316adc7788
commit 09e28e7859
8 changed files with 56 additions and 80 deletions
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33
src/runtime/stack.c
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@ -60,28 +60,22 @@ size_t ts_stack_right_position(const ts_stack *stack) {
ts_tree * ts_stack_reduce(ts_stack *stack, ts_symbol symbol, int immediate_child_count, const int *hidden_symbol_flags) {
size_t new_stack_size = stack->size - immediate_child_count;
size_t size = 0, offset = 0;
int flags[immediate_child_count];
int child_count = 0;
for (int i = 0; i < immediate_child_count; i++) {
ts_tree *child = stack->entries[new_stack_size + i].node;
if (i == 0) {
offset = ts_tree_offset(child);
size = ts_tree_size(child);
} else {
size += ts_tree_offset(child) + ts_tree_size(child);
}
if (hidden_symbol_flags[ts_tree_symbol(child)]) {
size_t grandchild_count;
ts_tree_children(child, &grandchild_count);
child_count += grandchild_count;
} else {
child_count++;
}
size_t grandchild_count;
ts_tree **grandchildren = ts_tree_children(child, &grandchild_count);
flags[i] = (
hidden_symbol_flags[ts_tree_symbol(child)] ||
(grandchild_count == 1 && ts_tree_size(child) == ts_tree_size(grandchildren[0]))
);
child_count += (flags[i]) ? grandchild_count : 1;
}
size_t child_index = 0;
size_t size = 0, offset = 0;
ts_tree **children = malloc((child_count + immediate_child_count) * sizeof(ts_tree *));
ts_tree **immediate_children = children + child_count;
@ -89,7 +83,14 @@ ts_tree * ts_stack_reduce(ts_stack *stack, ts_symbol symbol, int immediate_child
ts_tree *child = stack->entries[new_stack_size + i].node;
immediate_children[i] = child;
if (hidden_symbol_flags[ts_tree_symbol(child)]) {
if (i == 0) {
offset = ts_tree_offset(child);
size = ts_tree_size(child);
} else {
size += ts_tree_offset(child) + ts_tree_size(child);
}
if (flags[i]) {
size_t grandchild_count;
ts_tree ** grandchildren = ts_tree_children(child, &grandchild_count);
memcpy(children + child_index, grandchildren, (grandchild_count * sizeof(ts_tree *)));