Lay groundwork for detached editor windows

new_editor/include/XCEditor/Shell/UIEditorDockHostInteraction.h

@@ -31,10 +31,13 @@ struct UIEditorDockHostInteractionResult {
     bool consumed = false;
     bool commandExecuted = false;
     bool layoutChanged = false;
+    bool detachRequested = false;
     bool requestPointerCapture = false;
     bool releasePointerCapture = false;
     Widgets::UIEditorDockHostHitTarget hitTarget = {};
     std::string activeSplitterNodeId = {};
+    std::string detachedNodeId = {};
+    std::string detachedPanelId = {};
     UIEditorWorkspaceCommandResult commandResult = {};
     UIEditorWorkspaceLayoutOperationResult layoutResult = {};
 };

new_editor/include/XCEditor/Shell/UIEditorWindowWorkspaceController.h

@@ -0,0 +1,91 @@
+#pragma once
+
+#include <XCEditor/Shell/UIEditorWindowWorkspaceModel.h>
+
+#include <cstdint>
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace XCEngine::UI::Editor {
+
+enum class UIEditorWindowWorkspaceOperationStatus : std::uint8_t {
+    Changed = 0,
+    NoOp,
+    Rejected
+};
+
+struct UIEditorWindowWorkspaceOperationResult {
+    UIEditorWindowWorkspaceOperationStatus status =
+        UIEditorWindowWorkspaceOperationStatus::Rejected;
+    std::string message = {};
+    std::string sourceWindowId = {};
+    std::string targetWindowId = {};
+    std::string panelId = {};
+    std::string activeWindowId = {};
+    std::vector<std::string> windowIds = {};
+};
+
+std::string_view GetUIEditorWindowWorkspaceOperationStatusName(
+    UIEditorWindowWorkspaceOperationStatus status);
+
+class UIEditorWindowWorkspaceController {
+public:
+    UIEditorWindowWorkspaceController() = default;
+    UIEditorWindowWorkspaceController(
+        UIEditorPanelRegistry panelRegistry,
+        UIEditorWindowWorkspaceSet windowSet);
+
+    const UIEditorPanelRegistry& GetPanelRegistry() const {
+        return m_panelRegistry;
+    }
+
+    const UIEditorWindowWorkspaceSet& GetWindowSet() const {
+        return m_windowSet;
+    }
+
+    UIEditorWindowWorkspaceValidationResult ValidateState() const;
+
+    UIEditorWindowWorkspaceOperationResult DetachPanelToNewWindow(
+        std::string_view sourceWindowId,
+        std::string_view sourceNodeId,
+        std::string_view panelId,
+        std::string_view preferredNewWindowId = {});
+
+    UIEditorWindowWorkspaceOperationResult MovePanelToStack(
+        std::string_view sourceWindowId,
+        std::string_view sourceNodeId,
+        std::string_view panelId,
+        std::string_view targetWindowId,
+        std::string_view targetNodeId,
+        std::size_t targetVisibleInsertionIndex);
+
+    UIEditorWindowWorkspaceOperationResult DockPanelRelative(
+        std::string_view sourceWindowId,
+        std::string_view sourceNodeId,
+        std::string_view panelId,
+        std::string_view targetWindowId,
+        std::string_view targetNodeId,
+        UIEditorWorkspaceDockPlacement placement,
+        float splitRatio = 0.5f);
+
+private:
+    UIEditorWindowWorkspaceOperationResult BuildOperationResult(
+        UIEditorWindowWorkspaceOperationStatus status,
+        std::string message,
+        std::string_view sourceWindowId,
+        std::string_view targetWindowId,
+        std::string_view panelId) const;
+
+    std::string MakeUniqueWindowId(std::string_view base) const;
+
+    UIEditorPanelRegistry m_panelRegistry = {};
+    UIEditorWindowWorkspaceSet m_windowSet = {};
+};
+
+UIEditorWindowWorkspaceController BuildDefaultUIEditorWindowWorkspaceController(
+    const UIEditorPanelRegistry& panelRegistry,
+    const UIEditorWorkspaceModel& workspace,
+    std::string primaryWindowId = "main-window");
+
+} // namespace XCEngine::UI::Editor

new_editor/include/XCEditor/Shell/UIEditorWindowWorkspaceModel.h

@@ -0,0 +1,62 @@
+#pragma once
+
+#include <XCEditor/Shell/UIEditorPanelRegistry.h>
+#include <XCEditor/Shell/UIEditorWorkspaceSession.h>
+
+#include <cstdint>
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace XCEngine::UI::Editor {
+
+struct UIEditorWindowWorkspaceState {
+    std::string windowId = {};
+    UIEditorWorkspaceModel workspace = {};
+    UIEditorWorkspaceSession session = {};
+};
+
+struct UIEditorWindowWorkspaceSet {
+    std::string primaryWindowId = {};
+    std::string activeWindowId = {};
+    std::vector<UIEditorWindowWorkspaceState> windows = {};
+};
+
+enum class UIEditorWindowWorkspaceValidationCode : std::uint8_t {
+    None = 0,
+    InvalidPanelRegistry,
+    EmptyWindowId,
+    DuplicateWindowId,
+    MissingPrimaryWindow,
+    MissingActiveWindow,
+    InvalidWorkspace,
+    InvalidSession
+};
+
+struct UIEditorWindowWorkspaceValidationResult {
+    UIEditorWindowWorkspaceValidationCode code = UIEditorWindowWorkspaceValidationCode::None;
+    std::string message = {};
+
+    [[nodiscard]] bool IsValid() const {
+        return code == UIEditorWindowWorkspaceValidationCode::None;
+    }
+};
+
+UIEditorWindowWorkspaceSet BuildDefaultUIEditorWindowWorkspaceSet(
+    const UIEditorPanelRegistry& panelRegistry,
+    const UIEditorWorkspaceModel& workspace,
+    std::string primaryWindowId = "main-window");
+
+const UIEditorWindowWorkspaceState* FindUIEditorWindowWorkspaceState(
+    const UIEditorWindowWorkspaceSet& windowSet,
+    std::string_view windowId);
+
+UIEditorWindowWorkspaceState* FindMutableUIEditorWindowWorkspaceState(
+    UIEditorWindowWorkspaceSet& windowSet,
+    std::string_view windowId);
+
+UIEditorWindowWorkspaceValidationResult ValidateUIEditorWindowWorkspaceSet(
+    const UIEditorPanelRegistry& panelRegistry,
+    const UIEditorWindowWorkspaceSet& windowSet);
+
+} // namespace XCEngine::UI::Editor

new_editor/include/XCEditor/Shell/UIEditorWorkspaceModel.h

@@ -150,6 +150,28 @@ bool TryReorderUIEditorWorkspaceTab(
     std::string_view panelId,
     std::size_t targetVisibleInsertionIndex);
 
+bool TryExtractUIEditorWorkspaceVisiblePanelNode(
+    UIEditorWorkspaceModel& workspace,
+    const UIEditorWorkspaceSession& session,
+    std::string_view sourceNodeId,
+    std::string_view panelId,
+    UIEditorWorkspaceNode& extractedPanel);
+
+bool TryInsertUIEditorWorkspacePanelNodeToStack(
+    UIEditorWorkspaceModel& workspace,
+    const UIEditorWorkspaceSession& session,
+    UIEditorWorkspaceNode panelNode,
+    std::string_view targetNodeId,
+    std::size_t targetVisibleInsertionIndex);
+
+bool TryDockUIEditorWorkspacePanelNodeRelative(
+    UIEditorWorkspaceModel& workspace,
+    const UIEditorWorkspaceSession& session,
+    UIEditorWorkspaceNode panelNode,
+    std::string_view targetNodeId,
+    UIEditorWorkspaceDockPlacement placement,
+    float splitRatio = 0.5f);
+
 bool TryMoveUIEditorWorkspaceTabToStack(
     UIEditorWorkspaceModel& workspace,
     const UIEditorWorkspaceSession& session,

new_editor/include/XCEditor/Shell/UIEditorWorkspaceTransfer.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <XCEditor/Shell/UIEditorWorkspaceSession.h>
+
+namespace XCEngine::UI::Editor {
+
+struct UIEditorWorkspaceExtractedPanel {
+    UIEditorWorkspaceNode panelNode = {};
+    UIEditorPanelSessionState sessionState = {};
+};
+
+bool TryExtractUIEditorWorkspaceVisiblePanel(
+    UIEditorWorkspaceModel& workspace,
+    UIEditorWorkspaceSession& session,
+    std::string_view sourceNodeId,
+    std::string_view panelId,
+    UIEditorWorkspaceExtractedPanel& extractedPanel);
+
+UIEditorWorkspaceModel BuildUIEditorDetachedWorkspaceFromExtractedPanel(
+    std::string rootNodeId,
+    UIEditorWorkspaceExtractedPanel extractedPanel);
+
+UIEditorWorkspaceSession BuildUIEditorDetachedWorkspaceSessionFromExtractedPanel(
+    UIEditorWorkspaceExtractedPanel extractedPanel);
+
+bool TryInsertExtractedUIEditorWorkspacePanelToStack(
+    UIEditorWorkspaceModel& workspace,
+    UIEditorWorkspaceSession& session,
+    UIEditorWorkspaceExtractedPanel extractedPanel,
+    std::string_view targetNodeId,
+    std::size_t targetVisibleInsertionIndex);
+
+bool TryDockExtractedUIEditorWorkspacePanelRelative(
+    UIEditorWorkspaceModel& workspace,
+    UIEditorWorkspaceSession& session,
+    UIEditorWorkspaceExtractedPanel extractedPanel,
+    std::string_view targetNodeId,
+    UIEditorWorkspaceDockPlacement placement,
+    float splitRatio = 0.5f);
+
+} // namespace XCEngine::UI::Editor