diff options
Diffstat (limited to 'api/dead/src/resources/Resource.cpp')
-rw-r--r-- | api/dead/src/resources/Resource.cpp | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/api/dead/src/resources/Resource.cpp b/api/dead/src/resources/Resource.cpp deleted file mode 100644 index e95675d7..00000000 --- a/api/dead/src/resources/Resource.cpp +++ /dev/null @@ -1,155 +0,0 @@ -#include "Resource.h" - -#include <QDebug> - -#include "ResourceObserver.h" -#include "ResourceHandler.h" - -// definition of static members of Resource -QMap<QString, std::function<std::shared_ptr<ResourceHandler>(const QString &)>> Resource::m_handlers; -QMap<QPair<int, int>, std::function<QVariant(QVariant)>> Resource::m_transfomers; -QMap<QString, std::weak_ptr<Resource>> Resource::m_resources; - -struct NullResourceResult {}; -Q_DECLARE_METATYPE(NullResourceResult) -class NullResourceHandler : public ResourceHandler -{ -public: - explicit NullResourceHandler() - { - setResult(QVariant::fromValue<NullResourceResult>(NullResourceResult())); - } -}; - -Resource::Resource(const QString &resource) - : m_resource(resource) -{ - if (!resource.isEmpty()) - { - // a valid resource identifier has the format <id>:<data> - Q_ASSERT(resource.contains(':')); - // "parse" the resource identifier into id and data - const QString resourceId = resource.left(resource.indexOf(':')); - const QString resourceData = resource.mid(resource.indexOf(':') + 1); - - // create and set up the handler - Q_ASSERT(m_handlers.contains(resourceId)); - m_handler = m_handlers.value(resourceId)(resourceData); - } - else - { - m_handler = std::make_shared<NullResourceHandler>(); - } - - Q_ASSERT(m_handler); - m_handler->init(m_handler); - m_handler->setResource(this); -} -Resource::~Resource() -{ - qDeleteAll(m_observers); -} - -Resource::Ptr Resource::create(const QString &resource, Ptr placeholder) -{ - const QString storageId = storageIdentifier(resource, placeholder); - - // do we already have a resource? even if m_resources contains it it might not be valid any longer (weak_ptr) - Resource::Ptr ptr = m_resources.contains(storageId) - ? m_resources.value(storageId).lock() - : nullptr; - // did we have one? and is it still valid? - if (!ptr) - { - /* We don't want Resource to have a public constructor, but std::make_shared needs it, - * so we create a subclass of Resource here that exposes the constructor as public. - * The alternative would be making the allocator for std::make_shared a friend, but it - * differs between different STL implementations, so that would be a pain. - */ - struct ConstructableResource : public Resource - { - explicit ConstructableResource(const QString &resource) - : Resource(resource) {} - }; - ptr = std::make_shared<ConstructableResource>(resource); - ptr->m_placeholder = placeholder; - m_resources.insert(storageId, ptr); - } - return ptr; -} - -Resource::Ptr Resource::applyTo(ResourceObserver *observer) -{ - m_observers.append(observer); - observer->setSource(shared_from_this()); // give the observer a shared_ptr for us so we don't get deleted - observer->resourceUpdated(); // ask the observer to poll us immediently, we might already have data - return shared_from_this(); // allow chaining -} -Resource::Ptr Resource::applyTo(QObject *target, const char *property) -{ - // the cast to ResourceObserver* is required to ensure the right overload gets choosen, - // since QObjectResourceObserver also inherits from QObject - return applyTo(static_cast<ResourceObserver *>(new QObjectResourceObserver(target, property))); -} - -QVariant Resource::getResourceInternal(const int typeId) const -{ - // no result (yet), but a placeholder? delegate to the placeholder. - if (m_handler->result().isNull() && m_placeholder) - { - return m_placeholder->getResourceInternal(typeId); - } - const QVariant variant = m_handler->result(); - const auto typePair = qMakePair(int(variant.type()), typeId); - - // do we have an explicit transformer? use it. - if (m_transfomers.contains(typePair)) - { - return m_transfomers.value(typePair)(variant); - } - else - { - // we do not have an explicit transformer, so we just pass the QVariant, which will automatically - // transform some types for us (different numbers to each other etc.) - return variant; - } -} - -void Resource::reportResult() -{ - for (ResourceObserver *observer : m_observers) - { - observer->resourceUpdated(); - } -} -void Resource::reportFailure(const QString &reason) -{ - for (ResourceObserver *observer : m_observers) - { - observer->setFailure(reason); - } -} -void Resource::reportProgress(const int progress) -{ - for (ResourceObserver *observer : m_observers) - { - observer->setProgress(progress); - } -} - -void Resource::notifyObserverDeleted(ResourceObserver *observer) -{ - m_observers.removeAll(observer); -} - -QString Resource::storageIdentifier(const QString &id, Resource::Ptr placeholder) -{ - if (placeholder) - { - return id + '#' + storageIdentifier(placeholder->m_resource, placeholder->m_placeholder); - } - else - { - return id; - } -} |