mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-20 17:58:18 +03:00
fcc3745b02
With this patch, CEvents no longer stop at the target object, but will bubble up the ancestor chain as long as CEvent::is_accepted() is false. To the set accepted flag, call CEvent::accept(). To clear the accepted flag, call CEvent::ignore(). Events start out in the accepted state, so if you want them to bubble up, you have to call ignore() on them. Using this mechanism, we now ignore non-tabbing keydown events in GWidget, causing them to bubble up through the widget's ancestors. :^)
129 lines
3.2 KiB
C++
129 lines
3.2 KiB
C++
#pragma once
|
|
|
|
#include <AK/String.h>
|
|
#include <AK/Function.h>
|
|
#include <AK/IntrusiveList.h>
|
|
#include <AK/StdLibExtras.h>
|
|
#include <AK/Vector.h>
|
|
#include <AK/Weakable.h>
|
|
|
|
namespace AK {
|
|
class JsonObject;
|
|
}
|
|
|
|
class CEvent;
|
|
class CChildEvent;
|
|
class CCustomEvent;
|
|
class CTimerEvent;
|
|
|
|
#define C_OBJECT(klass) \
|
|
public: \
|
|
virtual const char* class_name() const override { return #klass; }
|
|
|
|
class CObject : public Weakable<CObject> {
|
|
// NOTE: No C_OBJECT macro for CObject itself.
|
|
public:
|
|
IntrusiveListNode m_all_objects_list_node;
|
|
|
|
virtual ~CObject();
|
|
|
|
virtual const char* class_name() const = 0;
|
|
virtual void event(CEvent&);
|
|
|
|
const String& name() const { return m_name; }
|
|
void set_name(const StringView& name) { m_name = name; }
|
|
|
|
Vector<CObject*>& children() { return m_children; }
|
|
const Vector<CObject*>& children() const { return m_children; }
|
|
|
|
template<typename Callback>
|
|
void for_each_child(Callback callback)
|
|
{
|
|
for (auto* child : m_children) {
|
|
if (callback(*child) == IterationDecision::Break)
|
|
return;
|
|
}
|
|
}
|
|
|
|
template<typename T, typename Callback>
|
|
void for_each_child_of_type(Callback callback);
|
|
|
|
bool is_ancestor_of(const CObject&) const;
|
|
|
|
CObject* parent() { return m_parent; }
|
|
const CObject* parent() const { return m_parent; }
|
|
|
|
void start_timer(int ms);
|
|
void stop_timer();
|
|
bool has_timer() const { return m_timer_id; }
|
|
|
|
void add_child(CObject&);
|
|
void remove_child(CObject&);
|
|
|
|
void delete_later();
|
|
|
|
void dump_tree(int indent = 0);
|
|
|
|
void deferred_invoke(Function<void(CObject&)>);
|
|
|
|
bool is_widget() const { return m_widget; }
|
|
virtual bool is_window() const { return false; }
|
|
|
|
virtual void save_to(AK::JsonObject&);
|
|
|
|
static IntrusiveList<CObject, &CObject::m_all_objects_list_node>& all_objects();
|
|
|
|
void dispatch_event(CEvent&, CObject* stay_within = nullptr);
|
|
|
|
protected:
|
|
explicit CObject(CObject* parent = nullptr, bool is_widget = false);
|
|
|
|
virtual void timer_event(CTimerEvent&);
|
|
virtual void custom_event(CCustomEvent&);
|
|
|
|
// NOTE: You may get child events for children that are not yet fully constructed!
|
|
virtual void child_event(CChildEvent&);
|
|
|
|
private:
|
|
CObject* m_parent { nullptr };
|
|
String m_name;
|
|
int m_timer_id { 0 };
|
|
bool m_widget { false };
|
|
Vector<CObject*> m_children;
|
|
};
|
|
|
|
template<typename T>
|
|
inline bool is(const CObject&) { return false; }
|
|
|
|
template<>
|
|
inline bool is<CObject>(const CObject&) { return true; }
|
|
|
|
template<typename T>
|
|
inline T& to(CObject& object)
|
|
{
|
|
ASSERT(is<typename RemoveConst<T>::Type>(object));
|
|
return static_cast<T&>(object);
|
|
}
|
|
|
|
template<typename T>
|
|
inline const T& to(const CObject& object)
|
|
{
|
|
ASSERT(is<typename RemoveConst<T>::Type>(object));
|
|
return static_cast<const T&>(object);
|
|
}
|
|
|
|
template<typename T, typename Callback>
|
|
inline void CObject::for_each_child_of_type(Callback callback)
|
|
{
|
|
for_each_child([&](auto& child) {
|
|
if (is<T>(child))
|
|
return callback(to<T>(child));
|
|
return IterationDecision::Continue;
|
|
});
|
|
}
|
|
|
|
inline const LogStream& operator<<(const LogStream& stream, const CObject& object)
|
|
{
|
|
return stream << object.class_name() << '{' << &object << '}';
|
|
}
|