Files
XCEngine/new_editor/app/Platform/Win32/WindowManager/TabDrag.cpp

633 lines
22 KiB
C++

#include "Platform/Win32/WindowManager/Internal.h"
#include "State/EditorContext.h"
#include "Platform/Win32/EditorWindow.h"
#include <XCEditor/Docking/UIEditorDockHost.h>
#include <XCEditor/Workspace/UIEditorWorkspaceTransfer.h>
#include <XCEditor/Workspace/UIEditorWindowWorkspaceController.h>
#include <XCEngine/UI/Types.h>
#include <algorithm>
#include <cmath>
namespace XCEngine::UI::Editor::App::Internal {
namespace {
using ::XCEngine::UI::UIPoint;
using ::XCEngine::UI::UIRect;
constexpr LONG kFallbackDragHotspotX = 40;
constexpr LONG kFallbackDragHotspotY = 12;
struct CrossWindowDockDropTarget {
bool valid = false;
std::string nodeId = {};
UIEditorWorkspaceDockPlacement placement = UIEditorWorkspaceDockPlacement::Center;
std::size_t insertionIndex = Widgets::UIEditorTabStripInvalidIndex;
};
POINT BuildFallbackGlobalTabDragHotspot() {
POINT hotspot = {};
hotspot.x = kFallbackDragHotspotX;
hotspot.y = kFallbackDragHotspotY;
return hotspot;
}
float ResolveWindowDpiScale(HWND hwnd) {
if (hwnd == nullptr) {
return 1.0f;
}
const UINT dpi = GetDpiForWindow(hwnd);
return dpi == 0u ? 1.0f : static_cast<float>(dpi) / 96.0f;
}
bool IsPointInsideRect(const UIRect& rect, const UIPoint& point) {
return point.x >= rect.x &&
point.x <= rect.x + rect.width &&
point.y >= rect.y &&
point.y <= rect.y + rect.height;
}
bool CanStartGlobalTabDragFromWindow(
const EditorWindow& sourceWindow,
std::string_view sourceNodeId,
std::string_view panelId) {
UIEditorWorkspaceModel workspace =
sourceWindow.GetWorkspaceController().GetWorkspace();
UIEditorWorkspaceSession session =
sourceWindow.GetWorkspaceController().GetSession();
UIEditorWorkspaceExtractedPanel extractedPanel = {};
return TryExtractUIEditorWorkspaceVisiblePanel(
workspace,
session,
sourceNodeId,
panelId,
extractedPanel);
}
bool IsLiveInteractiveWindow(const EditorWindow* window) {
return window != nullptr &&
window->GetHwnd() != nullptr &&
!window->IsClosing();
}
std::size_t ResolveDropInsertionIndex(
const Widgets::UIEditorDockHostTabStackLayout& tabStack,
const UIPoint& point) {
if (!IsPointInsideRect(tabStack.tabStripLayout.headerRect, point)) {
return Widgets::UIEditorTabStripInvalidIndex;
}
std::size_t insertionIndex = 0u;
for (const UIRect& rect : tabStack.tabStripLayout.tabHeaderRects) {
const float midpoint = rect.x + rect.width * 0.5f;
if (point.x > midpoint) {
++insertionIndex;
}
}
return insertionIndex;
}
UIEditorWorkspaceDockPlacement ResolveDropPlacement(
const Widgets::UIEditorDockHostTabStackLayout& tabStack,
const UIPoint& point) {
if (IsPointInsideRect(tabStack.tabStripLayout.headerRect, point)) {
return UIEditorWorkspaceDockPlacement::Center;
}
const float leftDistance = point.x - tabStack.bounds.x;
const float rightDistance = tabStack.bounds.x + tabStack.bounds.width - point.x;
const float topDistance = point.y - tabStack.bounds.y;
const float bottomDistance = tabStack.bounds.y + tabStack.bounds.height - point.y;
const float minHorizontalThreshold = tabStack.bounds.width * 0.25f;
const float minVerticalThreshold = tabStack.bounds.height * 0.25f;
const float nearestEdge = (std::min)(
(std::min)(leftDistance, rightDistance),
(std::min)(topDistance, bottomDistance));
if (nearestEdge == leftDistance && leftDistance <= minHorizontalThreshold) {
return UIEditorWorkspaceDockPlacement::Left;
}
if (nearestEdge == rightDistance && rightDistance <= minHorizontalThreshold) {
return UIEditorWorkspaceDockPlacement::Right;
}
if (nearestEdge == topDistance && topDistance <= minVerticalThreshold) {
return UIEditorWorkspaceDockPlacement::Top;
}
if (nearestEdge == bottomDistance && bottomDistance <= minVerticalThreshold) {
return UIEditorWorkspaceDockPlacement::Bottom;
}
return UIEditorWorkspaceDockPlacement::Center;
}
bool TryResolveCrossWindowDockDropTarget(
const Widgets::UIEditorDockHostLayout& layout,
const UIPoint& point,
CrossWindowDockDropTarget& outTarget) {
outTarget = {};
if (!IsPointInsideRect(layout.bounds, point)) {
return false;
}
const Widgets::UIEditorDockHostHitTarget hitTarget =
Widgets::HitTestUIEditorDockHost(layout, point);
for (const Widgets::UIEditorDockHostTabStackLayout& tabStack : layout.tabStacks) {
if ((!hitTarget.nodeId.empty() && tabStack.nodeId != hitTarget.nodeId) ||
!IsPointInsideRect(tabStack.bounds, point)) {
continue;
}
outTarget.valid = true;
outTarget.nodeId = tabStack.nodeId;
outTarget.placement = ResolveDropPlacement(tabStack, point);
if (outTarget.placement == UIEditorWorkspaceDockPlacement::Center) {
outTarget.insertionIndex = ResolveDropInsertionIndex(tabStack, point);
if (outTarget.insertionIndex == Widgets::UIEditorTabStripInvalidIndex) {
outTarget.insertionIndex = tabStack.items.size();
}
}
return true;
}
for (const Widgets::UIEditorDockHostTabStackLayout& tabStack : layout.tabStacks) {
if (IsPointInsideRect(tabStack.bounds, point)) {
outTarget.valid = true;
outTarget.nodeId = tabStack.nodeId;
outTarget.placement = ResolveDropPlacement(tabStack, point);
if (outTarget.placement == UIEditorWorkspaceDockPlacement::Center) {
outTarget.insertionIndex = tabStack.items.size();
}
return true;
}
}
return false;
}
} // namespace
bool EditorWindowWorkspaceCoordinator::IsGlobalTabDragActive() const {
return m_globalTabDragSession.active;
}
bool EditorWindowWorkspaceCoordinator::OwnsActiveGlobalTabDrag(std::string_view windowId) const {
return m_globalTabDragSession.active &&
m_globalTabDragSession.panelWindowId == windowId;
}
void EditorWindowWorkspaceCoordinator::BeginGlobalTabDragSession(
std::string_view panelWindowId,
std::string_view sourceNodeId,
std::string_view panelId,
const POINT& screenPoint,
const POINT& dragHotspot) {
m_globalTabDragSession.active = true;
m_globalTabDragSession.panelWindowId = std::string(panelWindowId);
m_globalTabDragSession.sourceNodeId = std::string(sourceNodeId);
m_globalTabDragSession.panelId = std::string(panelId);
m_globalTabDragSession.screenPoint = screenPoint;
m_globalTabDragSession.dragHotspot = dragHotspot;
}
bool EditorWindowWorkspaceCoordinator::TryResolveGlobalTabDragHotspot(
const EditorWindow& sourceWindow,
std::string_view nodeId,
std::string_view panelId,
const POINT& screenPoint,
POINT& outDragHotspot) const {
const HWND hwnd = sourceWindow.GetHwnd();
if (hwnd == nullptr) {
return false;
}
const auto& layout =
sourceWindow.GetShellFrame().workspaceInteractionFrame.dockHostFrame.layout;
for (const Widgets::UIEditorDockHostTabStackLayout& tabStack : layout.tabStacks) {
if (tabStack.nodeId != nodeId) {
continue;
}
const std::size_t tabCount =
(std::min)(tabStack.items.size(), tabStack.tabStripLayout.tabHeaderRects.size());
for (std::size_t index = 0u; index < tabCount; ++index) {
if (tabStack.items[index].panelId != panelId) {
continue;
}
const ::XCEngine::UI::UIPoint clientPointDips =
sourceWindow.ConvertScreenPixelsToClientDips(screenPoint);
const ::XCEngine::UI::UIRect& tabRect =
tabStack.tabStripLayout.tabHeaderRects[index];
const float dpiScale = ResolveWindowDpiScale(hwnd);
const float localOffsetXDips = (std::clamp)(
clientPointDips.x - tabRect.x,
0.0f,
(std::max)(tabRect.width, 0.0f));
const float localOffsetYDips = (std::clamp)(
clientPointDips.y - tabRect.y,
0.0f,
(std::max)(tabRect.height, 0.0f));
outDragHotspot.x = static_cast<LONG>(std::lround(localOffsetXDips * dpiScale));
outDragHotspot.y = static_cast<LONG>(std::lround(localOffsetYDips * dpiScale));
return true;
}
}
return false;
}
void EditorWindowWorkspaceCoordinator::UpdateGlobalTabDragOwnerWindowPosition() {
if (!m_globalTabDragSession.active) {
return;
}
EditorWindow* ownerWindow = m_hostRuntime.FindWindow(m_globalTabDragSession.panelWindowId);
if (!IsLiveInteractiveWindow(ownerWindow)) {
return;
}
RECT windowRect = {};
if (!GetWindowRect(ownerWindow->GetHwnd(), &windowRect)) {
return;
}
const LONG targetLeft =
m_globalTabDragSession.screenPoint.x - m_globalTabDragSession.dragHotspot.x;
const LONG targetTop =
m_globalTabDragSession.screenPoint.y - m_globalTabDragSession.dragHotspot.y;
if (windowRect.left == targetLeft && windowRect.top == targetTop) {
return;
}
SetWindowPos(
ownerWindow->GetHwnd(),
nullptr,
targetLeft,
targetTop,
0,
0,
SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
}
void EditorWindowWorkspaceCoordinator::ClearGlobalTabDragDropPreview() {
if (m_globalTabDragSession.previewWindowId.empty()) {
return;
}
if (EditorWindow* previewWindow = m_hostRuntime.FindWindow(m_globalTabDragSession.previewWindowId);
IsLiveInteractiveWindow(previewWindow)) {
previewWindow->ClearExternalDockHostDropPreview();
previewWindow->InvalidateHostWindow();
}
m_globalTabDragSession.previewWindowId.clear();
}
void EditorWindowWorkspaceCoordinator::UpdateGlobalTabDragDropPreview() {
if (!m_globalTabDragSession.active) {
return;
}
EditorWindow* targetWindow = FindTopmostWindowAtScreenPoint(
m_globalTabDragSession.screenPoint,
m_globalTabDragSession.panelWindowId);
if (!IsLiveInteractiveWindow(targetWindow)) {
ClearGlobalTabDragDropPreview();
return;
}
const ::XCEngine::UI::UIPoint targetPoint =
targetWindow->ConvertScreenPixelsToClientDips(m_globalTabDragSession.screenPoint);
const Widgets::UIEditorDockHostLayout& targetLayout =
targetWindow->GetShellFrame().workspaceInteractionFrame.dockHostFrame.layout;
CrossWindowDockDropTarget dropTarget = {};
if (!TryResolveCrossWindowDockDropTarget(targetLayout, targetPoint, dropTarget) ||
!dropTarget.valid) {
ClearGlobalTabDragDropPreview();
return;
}
if (!m_globalTabDragSession.previewWindowId.empty() &&
m_globalTabDragSession.previewWindowId != targetWindow->GetWindowId()) {
ClearGlobalTabDragDropPreview();
}
Widgets::UIEditorDockHostDropPreviewState preview = {};
preview.visible = true;
preview.sourceNodeId = m_globalTabDragSession.sourceNodeId;
preview.sourcePanelId = m_globalTabDragSession.panelId;
preview.targetNodeId = dropTarget.nodeId;
preview.placement = dropTarget.placement;
preview.insertionIndex = dropTarget.insertionIndex;
targetWindow->SetExternalDockHostDropPreview(preview);
targetWindow->InvalidateHostWindow();
m_globalTabDragSession.previewWindowId = std::string(targetWindow->GetWindowId());
}
void EditorWindowWorkspaceCoordinator::EndGlobalTabDragSession() {
if (!m_globalTabDragSession.active) {
return;
}
ClearGlobalTabDragDropPreview();
if (EditorWindow* ownerWindow = m_hostRuntime.FindWindow(m_globalTabDragSession.panelWindowId);
ownerWindow != nullptr) {
if (GetCapture() == ownerWindow->GetHwnd()) {
ReleaseCapture();
}
if (!ownerWindow->IsClosing()) {
ownerWindow->ResetInteractionState();
}
}
m_globalTabDragSession = {};
}
bool EditorWindowWorkspaceCoordinator::HandleGlobalTabDragPointerMove(HWND hwnd) {
if (!m_globalTabDragSession.active) {
return false;
}
const EditorWindow* ownerWindow = m_hostRuntime.FindWindow(m_globalTabDragSession.panelWindowId);
if (!IsLiveInteractiveWindow(ownerWindow)) {
EndGlobalTabDragSession();
return false;
}
if (ownerWindow->GetHwnd() != hwnd) {
return false;
}
POINT screenPoint = {};
if (GetCursorPos(&screenPoint)) {
m_globalTabDragSession.screenPoint = screenPoint;
UpdateGlobalTabDragOwnerWindowPosition();
UpdateGlobalTabDragDropPreview();
}
return true;
}
bool EditorWindowWorkspaceCoordinator::HandleGlobalTabDragPointerButtonUp(HWND hwnd) {
if (!m_globalTabDragSession.active) {
return false;
}
const EditorWindow* ownerWindow = m_hostRuntime.FindWindow(m_globalTabDragSession.panelWindowId);
if (!IsLiveInteractiveWindow(ownerWindow)) {
EndGlobalTabDragSession();
return false;
}
if (ownerWindow->GetHwnd() != hwnd) {
return false;
}
POINT screenPoint = m_globalTabDragSession.screenPoint;
GetCursorPos(&screenPoint);
const std::string panelWindowId = m_globalTabDragSession.panelWindowId;
const std::string sourceNodeId = m_globalTabDragSession.sourceNodeId;
const std::string panelId = m_globalTabDragSession.panelId;
EndGlobalTabDragSession();
EditorWindow* targetWindow = FindTopmostWindowAtScreenPoint(screenPoint, panelWindowId);
if (!IsLiveInteractiveWindow(targetWindow)) {
return true;
}
const UIPoint targetPoint =
targetWindow->ConvertScreenPixelsToClientDips(screenPoint);
const Widgets::UIEditorDockHostLayout& targetLayout =
targetWindow->GetShellFrame().workspaceInteractionFrame.dockHostFrame.layout;
CrossWindowDockDropTarget dropTarget = {};
if (!TryResolveCrossWindowDockDropTarget(targetLayout, targetPoint, dropTarget)) {
return true;
}
UIEditorWindowWorkspaceController windowWorkspaceController =
BuildLiveWindowWorkspaceController(targetWindow->GetWindowId());
const UIEditorWindowWorkspaceOperationResult result =
dropTarget.placement == UIEditorWorkspaceDockPlacement::Center
? windowWorkspaceController.MovePanelToStack(
panelWindowId,
sourceNodeId,
panelId,
targetWindow->GetWindowId(),
dropTarget.nodeId,
dropTarget.insertionIndex)
: windowWorkspaceController.DockPanelRelative(
panelWindowId,
sourceNodeId,
panelId,
targetWindow->GetWindowId(),
dropTarget.nodeId,
dropTarget.placement);
if (result.status != UIEditorWindowWorkspaceOperationStatus::Changed) {
LogRuntimeTrace("drag", "cross-window drop rejected: " + result.message);
return true;
}
if (!SynchronizeWindowsFromController(
windowWorkspaceController,
{},
screenPoint)) {
LogRuntimeTrace("drag", "failed to synchronize windows after cross-window drop");
return true;
}
if (EditorWindow* updatedTargetWindow = m_hostRuntime.FindWindow(targetWindow->GetWindowId());
updatedTargetWindow != nullptr &&
updatedTargetWindow->GetHwnd() != nullptr &&
!updatedTargetWindow->IsClosing()) {
SetForegroundWindow(updatedTargetWindow->GetHwnd());
}
LogRuntimeTrace(
"drag",
"committed cross-window drop panel '" + panelId +
"' into window '" + std::string(targetWindow->GetWindowId()) + "'");
return true;
}
bool EditorWindowWorkspaceCoordinator::TryStartGlobalTabDrag(
EditorWindow& sourceWindow,
const EditorWindowPanelTransferRequest& request) {
if (sourceWindow.IsClosing()) {
LogRuntimeTrace("drag", "failed to start global tab drag: source window is closing");
return false;
}
POINT dragHotspot = BuildFallbackGlobalTabDragHotspot();
TryResolveGlobalTabDragHotspot(
sourceWindow,
request.nodeId,
request.panelId,
request.screenPoint,
dragHotspot);
if (sourceWindow.IsPrimary()) {
UIEditorWindowWorkspaceController windowWorkspaceController =
BuildLiveWindowWorkspaceController(sourceWindow.GetWindowId());
const UIEditorWindowWorkspaceOperationResult result =
windowWorkspaceController.DetachPanelToNewWindow(
sourceWindow.GetWindowId(),
request.nodeId,
request.panelId);
if (result.status != UIEditorWindowWorkspaceOperationStatus::Changed) {
LogRuntimeTrace(
"drag",
"failed to start global tab drag from primary window: " + result.message);
return false;
}
if (!SynchronizeWindowsFromController(
windowWorkspaceController,
result.targetWindowId,
request.screenPoint)) {
LogRuntimeTrace("drag", "failed to synchronize detached drag window state");
return false;
}
EditorWindow* detachedWindow = m_hostRuntime.FindWindow(result.targetWindowId);
if (!IsLiveInteractiveWindow(detachedWindow)) {
LogRuntimeTrace("drag", "detached drag window was not created.");
return false;
}
BeginGlobalTabDragSession(
detachedWindow->GetWindowId(),
detachedWindow->GetWorkspaceController().GetWorkspace().root.nodeId,
request.panelId,
request.screenPoint,
dragHotspot);
UpdateGlobalTabDragOwnerWindowPosition();
SetCapture(detachedWindow->GetHwnd());
SetForegroundWindow(detachedWindow->GetHwnd());
LogRuntimeTrace(
"drag",
"started global tab drag by detaching panel '" + request.panelId +
"' into window '" + std::string(detachedWindow->GetWindowId()) + "'");
return true;
}
sourceWindow.ResetInteractionState();
if (!CanStartGlobalTabDragFromWindow(sourceWindow, request.nodeId, request.panelId)) {
LogRuntimeTrace(
"drag",
"failed to start global tab drag from detached window: invalid source panel request");
return false;
}
BeginGlobalTabDragSession(
sourceWindow.GetWindowId(),
request.nodeId,
request.panelId,
request.screenPoint,
dragHotspot);
UpdateGlobalTabDragOwnerWindowPosition();
if (sourceWindow.GetHwnd() != nullptr) {
SetCapture(sourceWindow.GetHwnd());
}
LogRuntimeTrace(
"drag",
"started global tab drag from detached window '" +
std::string(sourceWindow.GetWindowId()) +
"' panel '" + request.panelId + "'");
return true;
}
bool EditorWindowWorkspaceCoordinator::TryProcessDetachRequest(
EditorWindow& sourceWindow,
const EditorWindowPanelTransferRequest& request) {
if (sourceWindow.IsClosing()) {
LogRuntimeTrace("detach", "detach request rejected: source window is closing");
return false;
}
const std::string sourceWindowId(sourceWindow.GetWindowId());
UIEditorWindowWorkspaceController windowWorkspaceController =
BuildLiveWindowWorkspaceController(sourceWindowId);
const UIEditorWindowWorkspaceOperationResult result =
windowWorkspaceController.DetachPanelToNewWindow(
sourceWindowId,
request.nodeId,
request.panelId);
if (result.status != UIEditorWindowWorkspaceOperationStatus::Changed) {
LogRuntimeTrace("detach", "detach request rejected: " + result.message);
return false;
}
if (!SynchronizeWindowsFromController(
windowWorkspaceController,
result.targetWindowId,
request.screenPoint)) {
LogRuntimeTrace("detach", "failed to synchronize detached window state");
return false;
}
if (EditorWindow* detachedWindow = m_hostRuntime.FindWindow(result.targetWindowId);
detachedWindow != nullptr &&
detachedWindow->GetHwnd() != nullptr &&
!detachedWindow->IsClosing()) {
SetForegroundWindow(detachedWindow->GetHwnd());
}
LogRuntimeTrace(
"detach",
"detached panel '" + request.panelId + "' from window '" + sourceWindowId +
"' to window '" + result.targetWindowId + "'");
return true;
}
EditorWindow* EditorWindowWorkspaceCoordinator::FindTopmostWindowAtScreenPoint(
const POINT& screenPoint,
std::string_view excludedWindowId) {
if (const HWND hitWindow = WindowFromPoint(screenPoint); hitWindow != nullptr) {
const HWND rootWindow = GetAncestor(hitWindow, GA_ROOT);
if (EditorWindow* window = m_hostRuntime.FindWindow(rootWindow);
window != nullptr &&
!window->IsClosing() &&
window->GetWindowId() != excludedWindowId) {
return window;
}
}
for (auto it = m_hostRuntime.GetWindows().rbegin(); it != m_hostRuntime.GetWindows().rend(); ++it) {
EditorWindow* const window = it->get();
if (window == nullptr ||
window->GetHwnd() == nullptr ||
window->IsClosing() ||
window->GetWindowId() == excludedWindowId) {
continue;
}
RECT windowRect = {};
if (GetWindowRect(window->GetHwnd(), &windowRect) &&
screenPoint.x >= windowRect.left &&
screenPoint.x < windowRect.right &&
screenPoint.y >= windowRect.top &&
screenPoint.y < windowRect.bottom) {
return window;
}
}
return nullptr;
}
const EditorWindow* EditorWindowWorkspaceCoordinator::FindTopmostWindowAtScreenPoint(
const POINT& screenPoint,
std::string_view excludedWindowId) const {
return const_cast<EditorWindowWorkspaceCoordinator*>(this)->FindTopmostWindowAtScreenPoint(
screenPoint,
excludedWindowId);
}
void EditorWindowWorkspaceCoordinator::LogRuntimeTrace(
std::string_view channel,
std::string_view message) const {
m_hostRuntime.LogRuntimeTrace(channel, message);
}
} // namespace XCEngine::UI::Editor::App::Internal