Build XCEditor workspace viewport compose foundation

new_editor/include/XCEditor/Core/UIEditorPanelRegistry.h

@@ -8,7 +8,8 @@
 namespace XCEngine::UI::Editor {
 
 enum class UIEditorPanelPresentationKind : std::uint8_t {
-    Placeholder = 0
+    Placeholder = 0,
+    ViewportShell
 };
 
 struct UIEditorPanelDescriptor {

new_editor/include/XCEditor/Core/UIEditorWorkspaceCompose.h

@@ -0,0 +1,99 @@
+#pragma once
+
+#include <XCEditor/Core/UIEditorPanelRegistry.h>
+#include <XCEditor/Core/UIEditorViewportShell.h>
+#include <XCEditor/Core/UIEditorWorkspaceSession.h>
+#include <XCEditor/Widgets/UIEditorDockHost.h>
+
+#include <XCEngine/UI/DrawData.h>
+
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace XCEngine::UI::Editor {
+
+struct UIEditorWorkspacePanelPresentationModel {
+    std::string panelId = {};
+    UIEditorPanelPresentationKind kind = UIEditorPanelPresentationKind::Placeholder;
+    UIEditorViewportShellModel viewportShellModel = {};
+};
+
+struct UIEditorWorkspacePanelPresentationState {
+    std::string panelId = {};
+    UIEditorViewportShellState viewportShellState = {};
+};
+
+struct UIEditorWorkspaceComposeState {
+    std::vector<UIEditorWorkspacePanelPresentationState> panelStates = {};
+};
+
+struct UIEditorWorkspaceViewportComposeRequest {
+    std::string panelId = {};
+    ::XCEngine::UI::UIRect bounds = {};
+    UIEditorViewportShellRequest viewportShellRequest = {};
+};
+
+struct UIEditorWorkspaceComposeRequest {
+    Widgets::UIEditorDockHostLayout dockHostLayout = {};
+    std::vector<UIEditorWorkspaceViewportComposeRequest> viewportRequests = {};
+};
+
+struct UIEditorWorkspaceViewportComposeFrame {
+    std::string panelId = {};
+    ::XCEngine::UI::UIRect bounds = {};
+    UIEditorViewportShellModel viewportShellModel = {};
+    UIEditorViewportShellFrame viewportShellFrame = {};
+};
+
+struct UIEditorWorkspaceComposeFrame {
+    Widgets::UIEditorDockHostLayout dockHostLayout = {};
+    std::vector<UIEditorWorkspaceViewportComposeFrame> viewportFrames = {};
+};
+
+const UIEditorWorkspacePanelPresentationModel* FindUIEditorWorkspacePanelPresentationModel(
+    const std::vector<UIEditorWorkspacePanelPresentationModel>& presentations,
+    std::string_view panelId);
+
+const UIEditorWorkspacePanelPresentationState* FindUIEditorWorkspacePanelPresentationState(
+    const UIEditorWorkspaceComposeState& state,
+    std::string_view panelId);
+
+const UIEditorWorkspaceViewportComposeRequest* FindUIEditorWorkspaceViewportPresentationRequest(
+    const UIEditorWorkspaceComposeRequest& request,
+    std::string_view panelId);
+
+const UIEditorWorkspaceViewportComposeFrame* FindUIEditorWorkspaceViewportPresentationFrame(
+    const UIEditorWorkspaceComposeFrame& frame,
+    std::string_view panelId);
+
+UIEditorWorkspaceComposeRequest ResolveUIEditorWorkspaceComposeRequest(
+    const ::XCEngine::UI::UIRect& bounds,
+    const UIEditorPanelRegistry& panelRegistry,
+    const UIEditorWorkspaceModel& workspace,
+    const UIEditorWorkspaceSession& session,
+    const std::vector<UIEditorWorkspacePanelPresentationModel>& presentations,
+    const Widgets::UIEditorDockHostState& dockHostState = {},
+    const Widgets::UIEditorDockHostMetrics& dockHostMetrics = {});
+
+UIEditorWorkspaceComposeFrame UpdateUIEditorWorkspaceCompose(
+    UIEditorWorkspaceComposeState& state,
+    const ::XCEngine::UI::UIRect& bounds,
+    const UIEditorPanelRegistry& panelRegistry,
+    const UIEditorWorkspaceModel& workspace,
+    const UIEditorWorkspaceSession& session,
+    const std::vector<UIEditorWorkspacePanelPresentationModel>& presentations,
+    const std::vector<::XCEngine::UI::UIInputEvent>& inputEvents,
+    const Widgets::UIEditorDockHostState& dockHostState = {},
+    const Widgets::UIEditorDockHostMetrics& dockHostMetrics = {});
+
+std::vector<std::string> CollectUIEditorWorkspaceComposeExternalBodyPanelIds(
+    const UIEditorWorkspaceComposeFrame& frame);
+
+void AppendUIEditorWorkspaceCompose(
+    ::XCEngine::UI::UIDrawList& drawList,
+    const UIEditorWorkspaceComposeFrame& frame,
+    const Widgets::UIEditorDockHostPalette& dockHostPalette = {},
+    const Widgets::UIEditorDockHostMetrics& dockHostMetrics = {});
+
+} // namespace XCEngine::UI::Editor

new_editor/include/XCEditor/Widgets/UIEditorDockHost.h

@@ -117,6 +117,12 @@ struct UIEditorDockHostLayout {
     std::vector<UIEditorDockHostTabStackLayout> tabStacks = {};
 };
 
+// Allows higher-level compose to own panel body presentation while DockHost
+// keeps drawing the surrounding chrome/frame.
+struct UIEditorDockHostForegroundOptions {
+    std::vector<std::string> externalBodyPanelIds = {};
+};
+
 const UIEditorDockHostSplitterLayout* FindUIEditorDockHostSplitterLayout(
     const UIEditorDockHostLayout& layout,
     std::string_view nodeId);
@@ -142,9 +148,16 @@ void AppendUIEditorDockHostBackground(
 void AppendUIEditorDockHostForeground(
     ::XCEngine::UI::UIDrawList& drawList,
     const UIEditorDockHostLayout& layout,
+    const UIEditorDockHostForegroundOptions& options = {},
     const UIEditorDockHostPalette& palette = {},
     const UIEditorDockHostMetrics& metrics = {});
 
+void AppendUIEditorDockHostForeground(
+    ::XCEngine::UI::UIDrawList& drawList,
+    const UIEditorDockHostLayout& layout,
+    const UIEditorDockHostPalette& palette,
+    const UIEditorDockHostMetrics& metrics = {});
+
 void AppendUIEditorDockHost(
     ::XCEngine::UI::UIDrawList& drawList,
     const ::XCEngine::UI::UIRect& bounds,
@@ -152,7 +165,18 @@ void AppendUIEditorDockHost(
     const UIEditorWorkspaceModel& workspace,
     const UIEditorWorkspaceSession& session,
     const UIEditorDockHostState& state = {},
+    const UIEditorDockHostForegroundOptions& foregroundOptions = {},
     const UIEditorDockHostPalette& palette = {},
     const UIEditorDockHostMetrics& metrics = {});
 
+void AppendUIEditorDockHost(
+    ::XCEngine::UI::UIDrawList& drawList,
+    const ::XCEngine::UI::UIRect& bounds,
+    const UIEditorPanelRegistry& panelRegistry,
+    const UIEditorWorkspaceModel& workspace,
+    const UIEditorWorkspaceSession& session,
+    const UIEditorDockHostState& state,
+    const UIEditorDockHostPalette& palette,
+    const UIEditorDockHostMetrics& metrics = {});
+
 } // namespace XCEngine::UI::Editor::Widgets