5 files changed, 62 insertions, 4 deletions
diff --git a/include/cru/common/String.hpp b/include/cru/common/String.hpp
index e7688555..dac81e8d 100644
--- a/include/cru/common/String.hpp
+++ b/include/cru/common/String.hpp
@@ -233,6 +233,8 @@ class CRU_BASE_API String {
 
   float ParseToFloat(Index* processed_characters_count = nullptr) const;
   double ParseToDouble(Index* processed_characters_count = nullptr) const;
+  std::vector<float> ParseToFloatList(value_type separator = u' ');
+  std::vector<double> ParseToDoubleList(value_type separator = u' ');
 
  private:
   static char16_t kEmptyBuffer[1];
diff --git a/include/cru/ui/mapper/ThicknessMapper.hpp b/include/cru/ui/mapper/ThicknessMapper.hpp
index 90d1ef46..68bbcf49 100644
--- a/include/cru/ui/mapper/ThicknessMapper.hpp
+++ b/include/cru/ui/mapper/ThicknessMapper.hpp
@@ -6,7 +6,7 @@
 #include "cru/xml/XmlNode.hpp"
 
 namespace cru::ui::mapper {
-class ThicknessMapper : public BasicMapper<Thickness> {
+class CRU_UI_API ThicknessMapper : public BasicMapper<Thickness> {
  public:
   CRU_DEFAULT_CONSTRUCTOR_DESTRUCTOR(ThicknessMapper)
 
diff --git a/include/cru/xml/XmlNode.hpp b/include/cru/xml/XmlNode.hpp
index 38f09d14..0972037a 100644
--- a/include/cru/xml/XmlNode.hpp
+++ b/include/cru/xml/XmlNode.hpp
@@ -90,6 +90,14 @@ class CRU_XML_API XmlElementNode : public XmlNode {
 
   Index GetChildCount() const { return children_.size(); }
   String GetAttribute(const String& key) const { return attributes_.at(key); }
+  std::optional<String> GetOptionalAttribute(const String& key) const {
+    auto it = attributes_.find(key);
+    if (it == attributes_.end()) {
+      return std::nullopt;
+    }
+
+    return it->second;
+  }
   XmlNode* GetChildAt(Index index) const { return children_[index]; }
 
   void AddAttribute(String key, String value);
diff --git a/src/common/String.cpp b/src/common/String.cpp
index 48705d3b..3721eed3 100644
--- a/src/common/String.cpp
+++ b/src/common/String.cpp
@@ -13,8 +13,7 @@
 namespace cru {
 double_conversion::StringToDoubleConverter
     String::kDefaultStringToDoubleConverter(
-        double_conversion::StringToDoubleConverter::ALLOW_TRAILING_JUNK |
-            double_conversion::StringToDoubleConverter::ALLOW_LEADING_SPACES |
+        double_conversion::StringToDoubleConverter::ALLOW_LEADING_SPACES |
             double_conversion::StringToDoubleConverter::ALLOW_TRAILING_SPACES |
             double_conversion::StringToDoubleConverter::
                 ALLOW_CASE_INSENSIBILITY,
@@ -454,6 +453,32 @@ double String::ParseToDouble(Index* processed_characters_count) const {
   return result;
 }
 
+std::vector<float> String::ParseToFloatList(value_type separator) {
+  std::vector<float> result;
+  auto list = Split(separator);
+  for (auto& item : list) {
+    auto value = ParseToFloat();
+    if (std::isnan(value)) {
+      throw Exception(u"Invalid double value.");
+    }
+    result.push_back(value);
+  }
+  return result;
+}
+
+std::vector<double> String::ParseToDoubleList(value_type separator) {
+  std::vector<double> result;
+  auto list = Split(separator);
+  for (auto& item : list) {
+    auto value = ParseToDouble();
+    if (std::isnan(value)) {
+      throw Exception(u"Invalid double value.");
+    }
+    result.push_back(value);
+  }
+  return result;
+}
+
 StringView StringView::substr(Index pos) {
   Expects(pos >= 0 && pos < size_);
   return StringView(ptr_ + pos, size_ - pos);
diff --git a/src/ui/mapper/ThicknessMapper.cpp b/src/ui/mapper/ThicknessMapper.cpp
index 684d0a4b..11f0be0d 100644
--- a/src/ui/mapper/ThicknessMapper.cpp
+++ b/src/ui/mapper/ThicknessMapper.cpp
@@ -2,10 +2,33 @@
 #include "cru/xml/XmlNode.hpp"
 
 namespace cru::ui::mapper {
-bool ThicknessMapper::XmlElementIsOfThisType(xml::XmlElementNode *node) {
+bool ThicknessMapper::XmlElementIsOfThisType(xml::XmlElementNode* node) {
   if (node->GetTag() == u"Thickness") {
     return true;
   }
   return false;
 }
+
+std::unique_ptr<Thickness> ThicknessMapper::DoMapFromString(String str) {
+  std::vector<float> values = str.ParseToFloatList();
+  if (values.size() == 4) {
+    return std::make_unique<Thickness>(values[0], values[1], values[2],
+                                       values[3]);
+  } else if (values.size() == 2) {
+    return std::make_unique<Thickness>(values[0], values[1], values[0],
+                                       values[1]);
+  } else if (values.size() == 1) {
+    return std::make_unique<Thickness>(values[0], values[0], values[0],
+                                       values[0]);
+  } else {
+    throw Exception(u"Invalid Thickness string.");
+  }
+}
+
+std::unique_ptr<Thickness> ThicknessMapper::DoMapFromXml(
+    xml::XmlElementNode* node) {
+  auto value_attr = node->GetOptionalAttribute(u"value");
+  if (!value_attr) return std::make_unique<Thickness>();
+  return DoMapFromString(*value_attr);
+}
 }  // namespace cru::ui::mapper