ui: add typed editor field foundations

new_editor/include/XCEditor/Widgets/UIEditorTextLayout.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <XCEngine/UI/DrawData.h>
+
+#include <algorithm>
+#include <cmath>
+
+namespace XCEngine::UI::Editor::Widgets {
+
+inline float MeasureUIEditorTextLayoutHeight(float fontSize) {
+    return (std::max)(0.0f, fontSize * 1.35f);
+}
+
+inline float ResolveUIEditorTextTop(
+    const ::XCEngine::UI::UIRect& rect,
+    float fontSize,
+    float offsetY = 0.0f) {
+    const float textHeight = MeasureUIEditorTextLayoutHeight(fontSize);
+    const float centeredTop =
+        rect.y + (std::max)(0.0f, std::floor((rect.height - textHeight) * 0.5f));
+    return centeredTop - 1.0f + offsetY;
+}
+
+inline ::XCEngine::UI::UIRect ResolveUIEditorTextClipRect(
+    const ::XCEngine::UI::UIRect& rect,
+    float fontSize) {
+    const float extraPadding = (std::max)(2.0f, std::ceil(fontSize * 0.35f));
+    return ::XCEngine::UI::UIRect(
+        rect.x,
+        rect.y - 1.0f,
+        rect.width,
+        rect.height + extraPadding + 1.0f);
+}
+
+} // namespace XCEngine::UI::Editor::Widgets