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LibCore+LibGUI: Make ObjectClassRegistration::construct() nullable

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This lays the groundwork for allowing the registration of abstract
core objects, which will be needed for improved GML autocomplete.
This commit is contained in:
thislooksfun 2021-10-25 20:19:28 -05:00 • committed by Andreas Kling
parent 0e537e2e1f
commit c3b0b9057e
3 changed files with 14 additions and 12 deletions
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2
Userland/Libraries/LibCore/Object.cpp
View file

@ -258,7 +258,7 @@ static HashMap<StringView, ObjectClassRegistration*>& object_classes()
return *map;
}
ObjectClassRegistration::ObjectClassRegistration(StringView class_name, Function<NonnullRefPtr<Object>()> factory, ObjectClassRegistration* parent_class)
ObjectClassRegistration::ObjectClassRegistration(StringView class_name, Function<RefPtr<Object>()> factory, ObjectClassRegistration* parent_class)
: m_class_name(class_name)
, m_factory(move(factory))
, m_parent_class(parent_class)

6
Userland/Libraries/LibCore/Object.h
View file

@ -32,12 +32,12 @@ class ObjectClassRegistration {
AK_MAKE_NONMOVABLE(ObjectClassRegistration);
public:
ObjectClassRegistration(StringView class_name, Function<NonnullRefPtr<Object>()> factory, ObjectClassRegistration* parent_class = nullptr);
ObjectClassRegistration(StringView class_name, Function<RefPtr<Object>()> factory, ObjectClassRegistration* parent_class = nullptr);
~ObjectClassRegistration();
String class_name() const { return m_class_name; }
const ObjectClassRegistration* parent_class() const { return m_parent_class; }
NonnullRefPtr<Object> construct() const { return m_factory(); }
RefPtr<Object> construct() const { return m_factory(); }
bool is_derived_from(const ObjectClassRegistration& base_class) const;
static void for_each(Function<void(const ObjectClassRegistration&)>);
@ -45,7 +45,7 @@ public:
private:
StringView m_class_name;
Function<NonnullRefPtr<Object>()> m_factory;
Function<RefPtr<Object>()> m_factory;
ObjectClassRegistration* m_parent_class { nullptr };
};

18
Userland/Libraries/LibGUI/GMLAutocompleteProvider.cpp
View file

@ -145,10 +145,11 @@ void GMLAutocompleteProvider::provide_completions(Function<void(Vector<Entry>)>
}
auto registration = Core::ObjectClassRegistration::find(class_names.last());
if (registration && registration->is_derived_from(widget_class)) {
auto instance = registration->construct();
for (auto& it : instance->properties()) {
if (it.key.starts_with(identifier_string))
identifier_entries.empend(it.key, identifier_string.length());
if (auto instance = registration->construct()) {
for (auto& it : instance->properties()) {
if (it.key.starts_with(identifier_string))
identifier_entries.empend(it.key, identifier_string.length());
}
}
}
if (can_have_declared_layout(class_names.last()) && "layout"sv.starts_with(identifier_string))
@ -169,10 +170,11 @@ void GMLAutocompleteProvider::provide_completions(Function<void(Vector<Entry>)>
if (!class_names.is_empty()) {
auto registration = Core::ObjectClassRegistration::find(class_names.last());
if (registration && registration->is_derived_from(widget_class)) {
auto instance = registration->construct();
for (auto& it : instance->properties()) {
if (!it.value->is_readonly())
identifier_entries.empend(it.key, 0u);
if (auto instance = registration->construct()) {
for (auto& it : instance->properties()) {
if (!it.value->is_readonly())
identifier_entries.empend(it.key, 0u);
}
}
}
}