Step 167: split EditorState into sub-states

editor/src/StringUtils.h

@@ -0,0 +1,11 @@
+#pragma once
+#include <string>
+#include <cctype>
+
+static inline std::string trimCopy(const std::string& s) {
+    size_t start = 0;
+    while (start < s.size() && std::isspace((unsigned char)s[start])) ++start;
+    size_t end = s.size();
+    while (end > start && std::isspace((unsigned char)s[end - 1])) --end;
+    return s.substr(start, end - start);
+}