light/modules/engine/src/layer/layer_stack.cpp

#include <engine/events/event.hpp>
#include <engine/events/keyboard.hpp>
#include <engine/events/mouse.hpp>
#include <engine/events/window.hpp>
#include <engine/layer/layer.hpp>
#include <engine/layer/layer_stack.hpp>

namespace Light {

LayerStack *LayerStack::s_context = nullptr;

auto LayerStack::create() -> Scope<LayerStack>
{
	return make_scope<LayerStack>(new LayerStack());
}

LayerStack::LayerStack() 
{
	lt_assert(
	    !s_context,
	    "An instance of 'LayerStack' already exists, do not construct this class!"
	) s_context
	    = this;
}

LayerStack::~LayerStack()
{
	for (auto *layer : m_layers) {
		delete layer;
}
}

void LayerStack::attach_layer_impl(Layer *layer)
{
	// #todo: handle attaching layer inside a for loop
	m_layers.push_back(layer);
	m_begin = m_layers.begin();
	m_end = m_layers.end();

	log_trc("Attached [{}]", layer->get_name());
}

void LayerStack::detach_layer_impl(Layer *layer)
{
	// #todo: handle detaching layer inside a for loop
	m_layers.erase(std::find(m_layers.begin(), m_layers.end(), layer));
	m_begin = m_layers.begin();
	m_end = m_layers.end();

	log_trc("Detached [{}]", layer->get_name());
}

} // namespace Light