From 603f46e195823530bafda97f0dda1a332cc39dc8 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Wed, 23 Feb 2022 21:28:53 +0800
Subject: ...

---
 include/cru/ui/ThemeManager.h            | 71 +++++++--------------------
 include/cru/ui/ThemeResourceDictionary.h | 84 ++++++++++++++++++++++++++++++++
 2 files changed, 102 insertions(+), 53 deletions(-)
 create mode 100644 include/cru/ui/ThemeResourceDictionary.h

(limited to 'include/cru/ui')

diff --git a/include/cru/ui/ThemeManager.h b/include/cru/ui/ThemeManager.h
index 9176d85e..9917f219 100644
--- a/include/cru/ui/ThemeManager.h
+++ b/include/cru/ui/ThemeManager.h
@@ -1,28 +1,11 @@
 #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 "cru/ui/ThemeResourceDictionary.h"
 
-#include <any>
-#include <typeindex>
-#include <typeinfo>
-#include <unordered_map>
+#include <vector>
 
 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:
@@ -37,33 +20,21 @@ class CRU_UI_API ThemeManager : public Object {
 
   ~ThemeManager() override;
 
-  IEvent<std::nullptr_t>* ThemeResourceChangeEvent() {
-    return &theme_resource_change_event_;
-  }
-
-  void ReadResourcesFile(const String& file_path);
+  std::vector<ThemeResourceDictionary*> GetThemeResourceDictionaryList() const;
 
-  void SetThemeXml(xml::XmlElementNode* root);
+  void PrependThemeResourceDictionary(
+      std::unique_ptr<ThemeResourceDictionary> theme_resource_dictionary);
 
   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));
+    for (const auto& resource_dictionary : theme_resource_dictionary_list_) {
+      try {
+        return resource_dictionary->GetResource<T>(key);
+      } catch (ThemeResourceKeyNotExistException&) {
+      }
     }
-
-    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;
+    throw ThemeResourceKeyNotExistException(
+        Format(u"Theme resource key {} not exist.", key));
   }
 
   std::shared_ptr<platform::graphics::IBrush> GetResourceBrush(
@@ -74,19 +45,13 @@ class CRU_UI_API ThemeManager : public Object {
   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;
-  };
+  IEvent<std::nullptr_t>* ThemeResourceChangeEvent() {
+    return &theme_resource_change_event_;
+  }
 
+ private:
   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_;
+  std::vector<std::unique_ptr<ThemeResourceDictionary>>
+      theme_resource_dictionary_list_;
 };
 }  // namespace cru::ui
diff --git a/include/cru/ui/ThemeResourceDictionary.h b/include/cru/ui/ThemeResourceDictionary.h
new file mode 100644
index 00000000..26f7ec8d
--- /dev/null
+++ b/include/cru/ui/ThemeResourceDictionary.h
@@ -0,0 +1,84 @@
+#pragma once
+#include "Base.h"
+
+#include "cru/common/Base.h"
+#include "cru/xml/XmlNode.h"
+#include "mapper/MapperRegistry.h"
+#include "style/StyleRuleSet.h"
+
+#include <any>
+#include <typeindex>
+#include <typeinfo>
+
+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 ThemeResourceDictionary : public Object {
+  CRU_DEFINE_CLASS_LOG_TAG(u"ThemeResources");
+
+ public:
+  static std::unique_ptr<ThemeResourceDictionary> FromFile(const String& file_path);
+
+  explicit ThemeResourceDictionary(xml::XmlElementNode* xml_root, bool clone = true);
+
+  CRU_DELETE_COPY(ThemeResourceDictionary)
+  CRU_DELETE_MOVE(ThemeResourceDictionary)
+
+  ~ThemeResourceDictionary() override;
+
+ public:
+  template <typename T>
+  T GetResource(const String& key) {
+    auto find_result = resource_map_.find(key);
+    if (find_result == resource_map_.cend()) {
+      throw ThemeResourceKeyNotExistException(
+          Format(u"Theme resource key {} 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:
+  void UpdateResourceMap(xml::XmlElementNode* root_xml);
+
+ 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;
+  };
+
+  std::unique_ptr<xml::XmlElementNode> xml_root_;
+  std::unordered_map<String, ResourceEntry> resource_map_;
+};
+}  // namespace cru::ui
-- 
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