add read from zip

src/UiManager.cpp

@@ -152,15 +152,28 @@ namespace ZL {
 	}
 
 	void UiManager::loadFromFile(const std::string& path, Renderer& renderer, const std::string& zipFile) {
-		std::ifstream in(path);
-		if (!in.is_open()) {
-			std::cerr << "UiManager: failed to open " << path << std::endl;
+		std::string content;
+		try {
+			if (zipFile.empty()) {
+				content = readTextFile(path);
+			}
+			else {
+				auto buf = readFileFromZIP(path, zipFile);
+				if (buf.empty()) {
+					std::cerr << "UiManager: failed to read " << path << " from zip " << zipFile << std::endl;
+					throw std::runtime_error("Failed to load UI file: " + path);
+				}
+				content.assign(buf.begin(), buf.end());
+			}
+		}
+		catch (const std::exception& e) {
+			std::cerr << "UiManager: failed to open " << path << " : " << e.what() << std::endl;
 			throw std::runtime_error("Failed to load UI file: " + path);
 		}
 
 		json j;
 		try {
-			in >> j;
+			j = json::parse(content);
 		}
 		catch (const std::exception& e) {
 			std::cerr << "UiManager: json parse error: " << e.what() << std::endl;