Add XCUI command routing and widget state models

engine/src/UI/Widgets/UIPropertyEditModel.cpp

@@ -0,0 +1,95 @@
+#include <XCEngine/UI/Widgets/UIPropertyEditModel.h>
+
+#include <utility>
+
+namespace XCEngine {
+namespace UI {
+namespace Widgets {
+
+bool UIPropertyEditModel::HasActiveEdit() const {
+    return !m_activeFieldId.empty();
+}
+
+const std::string& UIPropertyEditModel::GetActiveFieldId() const {
+    return m_activeFieldId;
+}
+
+const std::string& UIPropertyEditModel::GetStagedValue() const {
+    return m_stagedValue;
+}
+
+bool UIPropertyEditModel::IsDirty() const {
+    return m_dirty;
+}
+
+bool UIPropertyEditModel::BeginEdit(std::string fieldId, std::string initialValue) {
+    if (fieldId.empty()) {
+        return false;
+    }
+
+    const bool stateChanged =
+        m_activeFieldId != fieldId ||
+        m_baselineValue != initialValue ||
+        m_stagedValue != initialValue ||
+        m_dirty;
+    if (!stateChanged) {
+        return false;
+    }
+
+    m_activeFieldId = std::move(fieldId);
+    m_baselineValue = std::move(initialValue);
+    m_stagedValue = m_baselineValue;
+    m_dirty = false;
+    return true;
+}
+
+bool UIPropertyEditModel::UpdateStagedValue(std::string stagedValue) {
+    if (!HasActiveEdit()) {
+        return false;
+    }
+
+    if (m_stagedValue == stagedValue) {
+        return false;
+    }
+
+    m_stagedValue = std::move(stagedValue);
+    m_dirty = (m_stagedValue != m_baselineValue);
+    return true;
+}
+
+bool UIPropertyEditModel::CommitEdit(
+    std::string* outFieldId,
+    std::string* outCommittedValue) {
+    if (!HasActiveEdit()) {
+        return false;
+    }
+
+    if (outFieldId != nullptr) {
+        *outFieldId = m_activeFieldId;
+    }
+    if (outCommittedValue != nullptr) {
+        *outCommittedValue = m_stagedValue;
+    }
+
+    m_activeFieldId.clear();
+    m_baselineValue.clear();
+    m_stagedValue.clear();
+    m_dirty = false;
+    return true;
+}
+
+bool UIPropertyEditModel::CancelEdit() {
+    if (!HasActiveEdit()) {
+        return false;
+    }
+
+    m_activeFieldId.clear();
+    m_baselineValue.clear();
+    m_stagedValue.clear();
+    m_dirty = false;
+    return true;
+}
+
+} // namespace Widgets
+} // namespace UI
+} // namespace XCEngine