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1 files changed, 57 insertions, 0 deletions

diff --git a/src/ui/ThemeResourceDictionary.cpp b/src/ui/ThemeResourceDictionary.cpp
new file mode 100644
index 00000000..d9483f6c
--- /dev/null
+++ b/src/ui/ThemeResourceDictionary.cpp
@@ -0,0 +1,57 @@
+#include "cru/ui/ThemeResourceDictionary.h"
+#include "cru/common/io/FileStream.h"
+#include "cru/common/log/Logger.h"
+#include "cru/xml/XmlNode.h"
+#include "cru/xml/XmlParser.h"
+
+namespace cru::ui {
+
+std::unique_ptr<ThemeResourceDictionary> ThemeResourceDictionary::FromFile(
+    const String& file_path) {
+  io::FileStream stream(file_path, io::OpenFileFlags::Read);
+  auto xml_string = stream.ReadAllAsString();
+  auto parser = xml::XmlParser(xml_string);
+  return std::make_unique<ThemeResourceDictionary>(parser.Parse(), false);
+}
+
+ThemeResourceDictionary::ThemeResourceDictionary(xml::XmlElementNode* xml_root,
+                                                 bool clone) {
+  Expects(xml_root);
+  xml_root_.reset(clone ? xml_root->Clone()->AsElement() : xml_root);
+  UpdateResourceMap(xml_root_.get());
+}
+
+ThemeResourceDictionary::~ThemeResourceDictionary() = default;
+
+void ThemeResourceDictionary::UpdateResourceMap(xml::XmlElementNode* xml_root) {
+  if (!xml_root->GetTag().CaseInsensitiveEqual(u"Theme")) {
+    throw Exception(u"Root tag of theme must be 'Theme'.");
+  }
+
+  for (auto child : xml_root->GetChildren()) {
+    if (child->IsElementNode()) {
+      auto c = child->AsElement();
+      if (c->GetTag().CaseInsensitiveEqual(u"Resource")) {
+        auto key_attr = c->GetOptionalAttributeCaseInsensitive(u"key");
+        if (!key_attr) {
+          throw Exception(u"'key' attribute is required for resource.");
+        }
+        if (c->GetChildElementCount() != 1) {
+          throw Exception(u"Resource must have only one child element.");
+        }
+
+        ResourceEntry entry;
+
+        entry.name = *key_attr;
+        entry.xml_node = c->GetFirstChildElement();
+
+        resource_map_[entry.name] = std::move(entry);
+      } else {
+        CRU_LOG_DEBUG(u"Ignore unknown element {} of theme.", c->GetTag());
+      }
+    } else {
+      CRU_LOG_WARN(u"Ignore text node of theme.");
+    }
+  }
+}
+}  // namespace cru::ui