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#pragma once
#include "Base.h"
#include "cru/common/Base.h"
#include "cru/common/Event.h"
#include "cru/common/Exception.h"
#include "cru/platform/graphics/Brush.h"
#include "cru/ui/mapper/MapperRegistry.h"
#include "cru/ui/style/StyleRuleSet.h"
#include "cru/xml/XmlNode.h"
#include <any>
#include <typeindex>
#include <typeinfo>
#include <unordered_map>
namespace cru::ui {
class CRU_UI_API ThemeResourceKeyNotExistException : public Exception {
public:
using Exception::Exception;
};
class CRU_UI_API BadThemeResourceException : public Exception {
public:
using Exception::Exception;
};
class CRU_UI_API ThemeManager : public Object {
public:
static ThemeManager* GetInstance();
private:
ThemeManager();
public:
CRU_DELETE_COPY(ThemeManager)
CRU_DELETE_MOVE(ThemeManager)
~ThemeManager() override;
IEvent<std::nullptr_t>* ThemeResourceChangeEvent() {
return &theme_resource_change_event_;
}
void ReadResourcesFile(const String& file_path);
void SetThemeXml(xml::XmlElementNode* root);
template <typename T>
T GetResource(const String& key) {
auto find_result = theme_resource_map_.find(key);
if (find_result == theme_resource_map_.cend()) {
throw ThemeResourceKeyNotExistException(
Format(u"Theme resource key \"%s\" not exist.", key));
}
auto& cache = find_result->second.cache;
auto cache_find_result = cache.find(typeid(T));
if (cache_find_result != cache.cend()) {
return std::any_cast<T>(cache_find_result->second);
}
auto mapper_registry = mapper::MapperRegistry::GetInstance();
auto mapper = mapper_registry->GetMapper<T>();
auto resource = mapper->MapFromXml(find_result->second.xml_node);
cache[typeid(T)] = resource;
return resource;
}
std::shared_ptr<platform::graphics::IBrush> GetResourceBrush(
const String& key);
std::shared_ptr<platform::graphics::IFont> GetResourceFont(const String& key);
std::shared_ptr<style::StyleRuleSet> GetResourceStyleRuleSet(
const String& key);
private:
struct ResourceEntry {
CRU_DEFAULT_CONSTRUCTOR_DESTRUCTOR(ResourceEntry)
CRU_DEFAULT_COPY(ResourceEntry)
CRU_DEFAULT_MOVE(ResourceEntry)
String name;
xml::XmlElementNode* xml_node;
std::unordered_map<std::type_index, std::any> cache;
};
Event<std::nullptr_t> theme_resource_change_event_;
std::unique_ptr<xml::XmlElementNode> theme_resource_xml_root_;
std::unordered_map<String, ResourceEntry> theme_resource_map_;
};
} // namespace cru::ui
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