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Everywhere: Make JSON serialization fallible

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This allows us to eliminate a major source of infallible allocation in
the Kernel, as well as lay down the groundwork for OOM fallibility in
userland.
This commit is contained in:
Idan Horowitz 2022-02-24 20:08:48 +02:00 • committed by Andreas Kling
parent 6682afb5d4
commit feb00b7105
18 changed files with 837 additions and 592 deletions
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33
Userland/Libraries/LibWeb/DOM/Node.cpp
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@ -723,47 +723,52 @@ bool Node::is_uninteresting_whitespace_node() const
void Node::serialize_tree_as_json(JsonObjectSerializer<StringBuilder>& object) const
{
object.add("name", node_name().view());
object.add("id", id());
MUST(object.add("name", node_name().view()));
MUST(object.add("id", id()));
if (is_document()) {
object.add("type", "document");
MUST(object.add("type", "document"));
} else if (is_element()) {
object.add("type", "element");
MUST(object.add("type", "element"));
auto const* element = static_cast<DOM::Element const*>(this);
if (element->has_attributes()) {
auto attributes = object.add_object("attributes");
auto attributes = MUST(object.add_object("attributes"));
element->for_each_attribute([&attributes](auto& name, auto& value) {
attributes.add(name, value);
MUST(attributes.add(name, value));
});
MUST(attributes.finish());
}
if (element->is_browsing_context_container()) {
auto const* container = static_cast<HTML::BrowsingContextContainer const*>(element);
if (auto const* content_document = container->content_document()) {
auto children = object.add_array("children");
JsonObjectSerializer<StringBuilder> content_document_object = children.add_object();
auto children = MUST(object.add_array("children"));
JsonObjectSerializer<StringBuilder> content_document_object = MUST(children.add_object());
content_document->serialize_tree_as_json(content_document_object);
MUST(content_document_object.finish());
MUST(children.finish());
}
}
} else if (is_text()) {
object.add("type", "text");
MUST(object.add("type", "text"));
auto text_node = static_cast<DOM::Text const*>(this);
object.add("text", text_node->data());
MUST(object.add("text", text_node->data()));
} else if (is_comment()) {
object.add("type"sv, "comment"sv);
object.add("data"sv, static_cast<DOM::Comment const&>(*this).data());
MUST(object.add("type"sv, "comment"sv));
MUST(object.add("data"sv, static_cast<DOM::Comment const&>(*this).data()));
}
if (has_child_nodes()) {
auto children = object.add_array("children");
auto children = MUST(object.add_array("children"));
for_each_child([&children](DOM::Node& child) {
if (child.is_uninteresting_whitespace_node())
return;
JsonObjectSerializer<StringBuilder> child_object = children.add_object();
JsonObjectSerializer<StringBuilder> child_object = MUST(children.add_object());
child.serialize_tree_as_json(child_object);
MUST(child_object.finish());
});
MUST(children.finish());
}
}