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HTML: added clone/deep clone functions for nodes.

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This related https://github.com/rushter/selectolax/issues/27 issue on GitHub.
This commit is contained in:
Alexander 2020-08-09 20:05:30 +03:00
parent a7ce974123
commit c0665aa477
2 changed files with 79 additions and 0 deletions
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76
source/myhtml/myhtml.c
View File

@ -1636,6 +1636,82 @@ myhtml_version_t myhtml_version(void)
return (myhtml_version_t){MyHTML_VERSION_MAJOR, MyHTML_VERSION_MINOR, MyHTML_VERSION_PATCH};
}
myhtml_tree_node_t * myhtml_node_clone(myhtml_tree_t* dest_tree, myhtml_tree_node_t* src)
{
myhtml_tag_id_t tag_id;
const myhtml_tag_context_t* tag_to, * tag_from;
myhtml_tree_node_t* new_node = myhtml_tree_node_create(dest_tree);
tag_id = src->tag_id;
if (tag_id >= MyHTML_TAG_LAST_ENTRY) {
tag_to = myhtml_tag_get_by_id(dest_tree->tags, src->tag_id);
tag_from = myhtml_tag_get_by_id(src->tree->tags, src->tag_id);
if (tag_to == NULL
|| tag_to->name_length != tag_from->name_length
|| mycore_strncmp(tag_to->name, tag_from->name, tag_from->name_length) != 0)
{
tag_id = myhtml_tag_add(dest_tree->tags, tag_from->name, tag_from->name_length,
MyHTML_TOKENIZER_STATE_DATA, true);
}
}
new_node->token = myhtml_token_node_clone(dest_tree->token, src->token,
dest_tree->mcasync_rules_token_id,
dest_tree->mcasync_rules_attr_id);
new_node->tag_id = tag_id;
new_node->ns = src->ns;
if(new_node->token) {
new_node->token->tag_id = tag_id;
new_node->token->type |= MyHTML_TOKEN_TYPE_DONE;
}
return new_node;
}
myhtml_tree_node_t * myhtml_node_clone_deep(myhtml_tree_t* dest_tree, myhtml_tree_node_t* src)
{
myhtml_tree_node_t* cloned, *root, *node;
myhtml_tree_node_t* scope_node = src;
if(scope_node && scope_node->tree && scope_node->tree->document == scope_node) {
src = scope_node->child;
}
root = node = myhtml_node_clone(dest_tree, src);
if (root == NULL) {
return NULL;
}
src = src->child;
while(src != NULL) {
cloned = myhtml_node_clone(dest_tree, src);
if (cloned == NULL) {
return NULL;
}
myhtml_tree_node_add_child(node, cloned);
if(src->child) {
src = src->child;
node = cloned;
}
else {
while(src != scope_node && src->next == NULL) {
node = node->parent;
src = src->parent;
}
if(src == scope_node) {
break;
}
src = src->next;
}
}
return root;
}

3
source/myhtml/myhtml.h
View File

@ -161,6 +161,8 @@ myhtml_tree_node_t * myhtml_node_insert_after(myhtml_tree_node_t *target, myhtml
myhtml_tree_node_t * myhtml_node_insert_before(myhtml_tree_node_t *target, myhtml_tree_node_t *node);
myhtml_tree_node_t * myhtml_node_create(myhtml_tree_t* tree, myhtml_tag_id_t tag_id, enum myhtml_namespace ns);
myhtml_tree_node_t * myhtml_node_clone(myhtml_tree_t* dest_tree, myhtml_tree_node_t* src);
myhtml_tree_node_t * myhtml_node_clone_deep(myhtml_tree_t* dest_tree, myhtml_tree_node_t* src);
myhtml_tree_node_t * myhtml_node_remove(myhtml_tree_node_t *node);
void myhtml_node_delete(myhtml_tree_node_t *node);
void myhtml_node_delete_recursive(myhtml_tree_node_t *node);
@ -221,6 +223,7 @@ mystatus_t myhtml_queue_add(myhtml_tree_t *tree, size_t begin, myhtml_token_node
/* version */
myhtml_version_t myhtml_version(void);
#ifdef __cplusplus
} /* extern "C" */
#endif