关键节点

editor/app/State/EditorSelectionService.h

@@ -0,0 +1,111 @@
+#pragma once
+
+#include "State/EditorSelectionStamp.h"
+#include "State/EditorSession.h"
+
+#include <filesystem>
+#include <string>
+#include <string_view>
+#include <utility>
+
+namespace XCEngine::UI::Editor::App {
+
+class EditorSelectionService {
+public:
+    const EditorSelectionState& GetSelection() const {
+        return m_selection;
+    }
+
+    bool HasSelection() const {
+        return m_selection.kind != EditorSelectionKind::None &&
+            !m_selection.itemId.empty();
+    }
+
+    bool HasSelectionKind(EditorSelectionKind kind) const {
+        return m_selection.kind == kind && HasSelection();
+    }
+
+    std::uint64_t GetStamp() const {
+        return m_selection.stamp;
+    }
+
+    bool SetProjectSelection(
+        std::string_view itemId,
+        std::string_view displayName,
+        const std::filesystem::path& absolutePath,
+        bool directory) {
+        EditorSelectionState selection = {};
+        selection.kind = EditorSelectionKind::ProjectItem;
+        selection.itemId = std::string(itemId);
+        selection.displayName = std::string(displayName);
+        selection.absolutePath = absolutePath;
+        selection.directory = directory;
+        const bool changed =
+            m_selection.kind != selection.kind ||
+            m_selection.itemId != selection.itemId ||
+            m_selection.absolutePath != selection.absolutePath ||
+            m_selection.directory != selection.directory;
+        ApplySelection(std::move(selection), changed);
+        return changed;
+    }
+
+    bool SetHierarchySelection(
+        std::string_view itemId,
+        std::string_view displayName = {}) {
+        EditorSelectionState selection = {};
+        selection.kind = EditorSelectionKind::HierarchyNode;
+        selection.itemId = std::string(itemId);
+        selection.displayName = std::string(displayName);
+        const bool changed =
+            m_selection.kind != selection.kind ||
+            m_selection.itemId != selection.itemId;
+        ApplySelection(std::move(selection), changed);
+        return changed;
+    }
+
+    void SetSelection(EditorSelectionState selection) {
+        bool changed = true;
+        switch (selection.kind) {
+        case EditorSelectionKind::ProjectItem:
+            changed =
+                m_selection.kind != selection.kind ||
+                m_selection.itemId != selection.itemId ||
+                m_selection.absolutePath != selection.absolutePath ||
+                m_selection.directory != selection.directory;
+            break;
+
+        case EditorSelectionKind::HierarchyNode:
+            changed =
+                m_selection.kind != selection.kind ||
+                m_selection.itemId != selection.itemId;
+            break;
+
+        case EditorSelectionKind::None:
+        default:
+            ClearSelection();
+            return;
+        }
+
+        ApplySelection(std::move(selection), changed);
+    }
+
+    void ClearSelection() {
+        m_selection = {};
+        m_selection.stamp = GenerateEditorSelectionStamp();
+    }
+
+private:
+    void ApplySelection(
+        EditorSelectionState selection,
+        bool changed) {
+        const std::uint64_t previousStamp = m_selection.stamp;
+        selection.stamp = changed
+            ? GenerateEditorSelectionStamp()
+            : (previousStamp != 0u ? previousStamp : GenerateEditorSelectionStamp());
+        m_selection = std::move(selection);
+    }
+
+    EditorSelectionState m_selection = {};
+};
+
+} // namespace XCEngine::UI::Editor::App