Files
paseo/packages/app/src/components/split-container.tsx
T
Mohamed Boudra 50ed0d0ab1 Fix desktop layout and window controls at half-screen width (#1983)
* fix(app): preserve desktop layout in half-screen windows

Treat native window controls as physical corner obstructions instead of deriving clearance from compact layout state. Keep 751px windows in desktop mode while preserving usable content when persisted sidebars are wide.

* fix(app): retain sidebar width across window resizes

* fix(app): yield app sidebar to narrow settings

* test(app): wait for mobile sidebar motion to settle

* fix(app): yield navigation to narrow workspace explorer

* fix(app): mark sidebar sizing helpers as worklets

* fix(app): hide app navigation when space is constrained
2026-07-14 23:01:14 +02:00

1166 lines
35 KiB
TypeScript

import {
Fragment,
memo,
useCallback,
useEffect,
useMemo,
useRef,
useState,
type Dispatch,
type ReactNode,
type SetStateAction,
} from "react";
import { useStableEvent } from "@/hooks/use-stable-event";
import {
DndContext,
DragOverlay,
KeyboardSensor,
PointerSensor,
closestCenter,
pointerWithin,
useSensor,
useSensors,
type CollisionDetection,
type DragEndEvent,
type DragMoveEvent,
type DragOverEvent,
type DragStartEvent,
} from "@dnd-kit/core";
import { arrayMove, sortableKeyboardCoordinates } from "@dnd-kit/sortable";
import { View, Text } from "react-native";
import { useTranslation } from "react-i18next";
import { StyleSheet, useUnistyles } from "react-native-unistyles";
import { ResizeHandle } from "@/components/resize-handle";
import { RetainedPanel } from "@/components/retained-panel";
import { resolveSplitContainerRoot } from "@/components/split-container-focus";
import { shouldFocusPaneFromEventTarget } from "@/components/split-container-pane-focus";
import {
WindowChromeRegion,
WindowChromeSafeArea,
useWindowChromeCorners,
type WindowChromeCorners,
} from "@/utils/desktop-window";
import { TitlebarDragRegion } from "@/components/desktop/titlebar-drag-region";
import {
computeTabDropPreview,
type TabDropPreview,
} from "@/components/split-container-tab-drop-preview";
import {
SplitDropZone,
resolveSplitDropPosition,
type SplitDropZoneHover,
} from "@/components/split-drop-zone";
import {
deriveWorkspacePaneState,
getWorkspacePaneDescriptors,
} from "@/screens/workspace/workspace-pane-state";
import { useMountedTabSet } from "@/screens/workspace/use-mounted-tab-set";
import {
WorkspacePaneContent,
type WorkspacePaneContentModel,
} from "@/screens/workspace/workspace-pane-content";
import {
WorkspaceDesktopTabsRow,
type WorkspaceDesktopTabRowItem,
} from "@/screens/workspace/workspace-desktop-tabs-row";
import type { TerminalProfileInput } from "@/screens/workspace/terminals/use-workspace-terminals";
import {
WorkspaceTabPresentationResolver,
WorkspaceTabIcon,
} from "@/screens/workspace/workspace-tab-presentation";
import type { WorkspaceTabDescriptor } from "@/screens/workspace/workspace-tabs-types";
import {
useWorkspaceLayoutStore,
type SplitNode,
type SplitPane,
type WorkspaceLayout,
} from "@/stores/workspace-layout-store";
import type { WorkspaceTab } from "@/stores/workspace-tabs-store";
import { RenderProfile } from "@/utils/render-profiler";
import { workspaceTabTargetsEqual } from "@/workspace-tabs/identity";
import { isNative } from "@/constants/platform";
interface SplitContainerProps {
layout: WorkspaceLayout;
workspaceKey: string;
normalizedServerId: string;
normalizedWorkspaceId: string;
isWorkspaceFocused: boolean;
uiTabs: WorkspaceTab[];
hoveredCloseTabKey: string | null;
setHoveredCloseTabKey: Dispatch<SetStateAction<string | null>>;
closingTabIds: Set<string>;
onNavigateTab: (tabId: string) => void;
onCloseTab: (tabId: string) => Promise<void> | void;
onCopyResumeCommand: (agentId: string) => Promise<void> | void;
onCopyAgentId: (agentId: string) => Promise<void> | void;
onCopyFilePath: (path: string) => Promise<void> | void;
onReloadAgent: (agentId: string) => Promise<void> | void;
onRenameTab: (tab: WorkspaceTabDescriptor) => void;
onCloseTabsToLeft: (tabId: string, paneTabs: WorkspaceTabDescriptor[]) => Promise<void> | void;
onCloseTabsToRight: (tabId: string, paneTabs: WorkspaceTabDescriptor[]) => Promise<void> | void;
onCloseOtherTabs: (tabId: string, paneTabs: WorkspaceTabDescriptor[]) => Promise<void> | void;
onCreateDraftTab: (input: { paneId?: string }) => void;
onCreateTerminalTab: (input: { paneId?: string; profile?: TerminalProfileInput }) => void;
onCreateBrowserTab: (input: { paneId?: string }) => void;
showCreateBrowserTab?: boolean;
buildPaneContentModel: (input: {
paneId: string;
tab: WorkspaceTabDescriptor;
}) => WorkspacePaneContentModel;
onFocusPane: (paneId: string) => void;
onSplitPane: (input: {
tabId: string;
targetPaneId: string;
position: "left" | "right" | "top" | "bottom";
}) => void;
onSplitPaneEmpty: (input: {
targetPaneId: string;
position: "left" | "right" | "top" | "bottom";
}) => void;
onMoveTabToPane: (tabId: string, toPaneId: string) => void;
onResizeSplit: (groupId: string, sizes: number[]) => void;
onReorderTabsInPane: (paneId: string, tabIds: string[]) => void;
renderPaneEmptyState?: () => ReactNode;
focusModeEnabled?: boolean;
}
interface WorkspaceTabDragData {
kind: "workspace-tab";
paneId: string;
tabId: string;
}
interface SplitPaneDropData {
kind: "split-pane-drop";
paneId: string;
}
function isWorkspaceTabDragData(data: unknown): data is WorkspaceTabDragData {
return typeof data === "object" && data !== null && Reflect.get(data, "kind") === "workspace-tab";
}
function isSplitPaneDropData(data: unknown): data is SplitPaneDropData {
return (
typeof data === "object" && data !== null && Reflect.get(data, "kind") === "split-pane-drop"
);
}
function asWorkspaceTabDragData(data: unknown): WorkspaceTabDragData | undefined {
return isWorkspaceTabDragData(data) ? data : undefined;
}
function asDragOverData(data: unknown): WorkspaceTabDragData | SplitPaneDropData | undefined {
if (isWorkspaceTabDragData(data)) return data;
if (isSplitPaneDropData(data)) return data;
return undefined;
}
interface SplitNodeViewProps extends Omit<SplitContainerProps, "layout" | "onMoveTabToPane"> {
node: SplitNode;
uiTabs: WorkspaceTab[];
focusedPaneId: string | null;
activeDragTabId: string | null;
showDropZones: boolean;
dropPreview: SplitDropZoneHover | null;
tabDropPreview: TabDropPreview | null;
windowChromeCorners: WindowChromeCorners;
}
interface SplitPaneViewProps extends Omit<
SplitNodeViewProps,
| "node"
| "workspaceKey"
| "focusedPaneId"
| "activeDragTabId"
| "showDropZones"
| "dropPreview"
| "onResizeSplit"
| "windowChromeCorners"
> {
pane: SplitPane;
uiTabs: WorkspaceTab[];
isFocused: boolean;
activeDragTabId: string | null;
showDropZones: boolean;
dropPreview: SplitDropZoneHover | null;
tabDropPreview: TabDropPreview | null;
}
interface MountedTabSlotProps {
tabDescriptor: WorkspaceTabDescriptor;
isVisible: boolean;
isWorkspaceFocused: boolean;
isPaneFocused: boolean;
paneId: string;
onFocusPane: (paneId: string) => void;
buildPaneContentModel: (input: {
paneId: string;
tab: WorkspaceTabDescriptor;
}) => WorkspacePaneContentModel;
}
const MountedTabSlot = memo(function MountedTabSlot({
tabDescriptor,
isVisible,
isWorkspaceFocused,
isPaneFocused,
paneId,
onFocusPane,
buildPaneContentModel,
}: MountedTabSlotProps) {
const content = useMemo(
() =>
buildPaneContentModel({
paneId,
tab: tabDescriptor,
}),
[buildPaneContentModel, paneId, tabDescriptor],
);
const handleFocusPane = useCallback(() => {
onFocusPane(paneId);
}, [onFocusPane, paneId]);
return (
<RenderProfile id={`DesktopMountedTabSlot:${tabDescriptor.kind}:${tabDescriptor.tabId}`}>
<RetainedPanel active={isVisible}>
<WorkspacePaneContent
content={content}
isWorkspaceFocused={isWorkspaceFocused}
isPaneFocused={isPaneFocused}
onFocusPane={handleFocusPane}
/>
</RetainedPanel>
</RenderProfile>
);
});
function useStableTabDescriptorMap(tabDescriptors: WorkspaceTabDescriptor[]) {
const cacheRef = useRef(new Map<string, WorkspaceTabDescriptor>());
const tabDescriptorMap = useMemo(() => {
const next = new Map<string, WorkspaceTabDescriptor>();
for (const tabDescriptor of tabDescriptors) {
const cachedDescriptor = cacheRef.current.get(tabDescriptor.tabId);
if (
cachedDescriptor &&
cachedDescriptor.key === tabDescriptor.key &&
cachedDescriptor.kind === tabDescriptor.kind &&
workspaceTabTargetsEqual(cachedDescriptor.target, tabDescriptor.target)
) {
next.set(tabDescriptor.tabId, cachedDescriptor);
continue;
}
next.set(tabDescriptor.tabId, tabDescriptor);
}
return next;
}, [tabDescriptors]);
useEffect(() => {
cacheRef.current = tabDescriptorMap;
}, [tabDescriptorMap]);
return tabDescriptorMap;
}
interface DragMoveRects {
translatedRect: { left: number; top: number; width: number; height: number };
overRect: { left: number; top: number; width: number; height: number };
}
function resolveDragMoveRects(
event: Pick<DragMoveEvent, "active" | "over"> | Pick<DragOverEvent, "active" | "over">,
): DragMoveRects | null {
const translatedRect = event.active.rect.current.translated;
const overRect = event.over?.rect;
if (!translatedRect || !overRect || overRect.width <= 0 || overRect.height <= 0) {
return null;
}
return { translatedRect, overRect };
}
function computeTabOverDropPreview(input: {
activeData: WorkspaceTabDragData;
overData: WorkspaceTabDragData;
rects: DragMoveRects;
panesById: Map<string, SplitPane>;
uiTabs: WorkspaceTab[];
}): TabDropPreview | null {
const { activeData, overData, rects, panesById, uiTabs } = input;
const targetPane = panesById.get(overData.paneId) ?? null;
if (!targetPane) {
return null;
}
const targetTabs = getWorkspacePaneDescriptors({ pane: targetPane, tabs: uiTabs });
return computeTabDropPreview({
activePaneId: activeData.paneId,
activeTabId: activeData.tabId,
overPaneId: overData.paneId,
overTabId: overData.tabId,
targetTabs,
activeRect: {
left: rects.translatedRect.left,
width: rects.translatedRect.width,
},
overRect: {
left: rects.overRect.left,
width: rects.overRect.width,
},
});
}
function computePaneOverDropPreview(input: {
overData: SplitPaneDropData;
rects: DragMoveRects;
}): SplitDropZoneHover | null {
const { overData, rects } = input;
const centerX = rects.translatedRect.left + rects.translatedRect.width / 2;
const centerY = rects.translatedRect.top + rects.translatedRect.height / 2;
const relativeX = centerX - rects.overRect.left;
const relativeY = centerY - rects.overRect.top;
if (
Number.isNaN(relativeX) ||
Number.isNaN(relativeY) ||
relativeX < 0 ||
relativeX > rects.overRect.width ||
relativeY < 0 ||
relativeY > rects.overRect.height
) {
return null;
}
return {
paneId: overData.paneId,
position: resolveSplitDropPosition({
width: rects.overRect.width,
height: rects.overRect.height,
x: relativeX,
y: relativeY,
}),
};
}
const dropCollisionDetection: CollisionDetection = (args) => {
const pointerHits = pointerWithin(args);
const tabHits = pointerHits.filter(
(entry) => entry.data?.droppableContainer.data.current?.kind === "workspace-tab",
);
if (tabHits.length > 0) {
return tabHits;
}
const paneHits = pointerHits.filter(
(entry) => entry.data?.droppableContainer.data.current?.kind === "split-pane-drop",
);
if (paneHits.length > 0) {
return paneHits;
}
return closestCenter(args);
};
export function SplitContainer({
layout,
workspaceKey,
normalizedServerId,
normalizedWorkspaceId,
isWorkspaceFocused,
uiTabs,
hoveredCloseTabKey,
setHoveredCloseTabKey,
closingTabIds,
onNavigateTab,
onCloseTab,
onCopyResumeCommand,
onCopyAgentId,
onCopyFilePath,
onReloadAgent,
onRenameTab,
onCloseTabsToLeft,
onCloseTabsToRight,
onCloseOtherTabs,
onCreateDraftTab,
onCreateTerminalTab,
onCreateBrowserTab,
showCreateBrowserTab,
buildPaneContentModel,
onFocusPane,
onSplitPane,
onSplitPaneEmpty,
onMoveTabToPane,
onResizeSplit,
onReorderTabsInPane,
renderPaneEmptyState = () => null,
focusModeEnabled,
}: SplitContainerProps) {
const inheritedWindowChromeCorners = useWindowChromeCorners();
const windowChromeCorners = focusModeEnabled ? inheritedWindowChromeCorners : "none";
const [activeDragTabId, setActiveDragTabId] = useState<string | null>(null);
const [dropPreview, setDropPreview] = useState<SplitDropZoneHover | null>(null);
const [tabDropPreview, setTabDropPreview] = useState<TabDropPreview | null>(null);
const sensors = useSensors(
useSensor(PointerSensor, {
activationConstraint: {
distance: 8,
},
}),
useSensor(KeyboardSensor, {
coordinateGetter: sortableKeyboardCoordinates,
}),
);
const panesById = useMemo(() => collectPanesById(layout.root), [layout.root]);
const splitRoot = useMemo(
() =>
resolveSplitContainerRoot({
root: layout.root,
focusedPaneId: layout.focusedPaneId,
focusModeEnabled,
}),
[focusModeEnabled, layout.focusedPaneId, layout.root],
);
const renderRoot = useMemo(() => wrapRootPaneForStableMount(splitRoot.root), [splitRoot.root]);
const handleDragStart = useCallback((event: DragStartEvent) => {
const data = asWorkspaceTabDragData(event.active.data.current);
if (!data) {
setActiveDragTabId(null);
setDropPreview(null);
setTabDropPreview(null);
return;
}
setActiveDragTabId(data.tabId);
}, []);
const handleDragCancel = useCallback(() => {
setActiveDragTabId(null);
setDropPreview(null);
setTabDropPreview(null);
}, []);
const updateDropPreview = useCallback(
(event: Pick<DragMoveEvent, "active" | "over"> | Pick<DragOverEvent, "active" | "over">) => {
const activeData = asWorkspaceTabDragData(event.active.data.current);
const overData = asDragOverData(event.over?.data.current);
if (activeData?.kind !== "workspace-tab") {
setDropPreview(null);
setTabDropPreview(null);
return;
}
const rects = resolveDragMoveRects(event);
if (!rects) {
setDropPreview(null);
setTabDropPreview(null);
return;
}
if (overData?.kind === "workspace-tab") {
const preview = computeTabOverDropPreview({
activeData,
overData,
rects,
panesById,
uiTabs,
});
setDropPreview(null);
setTabDropPreview(preview);
return;
}
setTabDropPreview(null);
if (overData?.kind !== "split-pane-drop") {
setDropPreview(null);
return;
}
setDropPreview(computePaneOverDropPreview({ overData, rects }));
},
[panesById, uiTabs],
);
const applyTabDropEnd = useCallback(
(input: { activeData: WorkspaceTabDragData; overData: WorkspaceTabDragData }): void => {
const { activeData, overData } = input;
const sourcePane = panesById.get(activeData.paneId) ?? null;
const targetPane = panesById.get(overData.paneId) ?? null;
if (!sourcePane || !targetPane) {
return;
}
const sourceTabs = getWorkspacePaneDescriptors({ pane: sourcePane, tabs: uiTabs });
const targetTabs = getWorkspacePaneDescriptors({ pane: targetPane, tabs: uiTabs });
const sourceIndex = sourceTabs.findIndex((tab) => tab.tabId === activeData.tabId);
const resolvedTabDropPreview =
tabDropPreview?.paneId === overData.paneId ? tabDropPreview : null;
if (sourceIndex < 0 || !resolvedTabDropPreview) {
return;
}
if (activeData.paneId === overData.paneId) {
if (sourceIndex !== resolvedTabDropPreview.insertionIndex) {
const nextTabs = arrayMove(
sourceTabs,
sourceIndex,
resolvedTabDropPreview.insertionIndex,
);
onReorderTabsInPane(
activeData.paneId,
nextTabs.map((tab) => tab.tabId),
);
}
return;
}
const nextTargetTabIds = targetTabs.map((tab) => tab.tabId);
nextTargetTabIds.splice(resolvedTabDropPreview.insertionIndex, 0, activeData.tabId);
onMoveTabToPane(activeData.tabId, overData.paneId);
onReorderTabsInPane(overData.paneId, nextTargetTabIds);
},
[onMoveTabToPane, onReorderTabsInPane, panesById, tabDropPreview, uiTabs],
);
const applyPaneDropEnd = useCallback(
(input: { activeData: WorkspaceTabDragData; overData: SplitPaneDropData }): void => {
const { activeData, overData } = input;
if (dropPreview?.paneId !== overData.paneId) {
return;
}
if (dropPreview.position === "center") {
if (activeData.paneId !== overData.paneId) {
onMoveTabToPane(activeData.tabId, overData.paneId);
}
return;
}
onSplitPane({
tabId: activeData.tabId,
targetPaneId: overData.paneId,
position: dropPreview.position,
});
},
[dropPreview, onMoveTabToPane, onSplitPane],
);
const handleDragEnd = useCallback(
(event: DragEndEvent) => {
const activeData = asWorkspaceTabDragData(event.active.data.current);
const overData = asDragOverData(event.over?.data.current);
setActiveDragTabId(null);
if (activeData?.kind === "workspace-tab" && event.over) {
if (overData?.kind === "workspace-tab") {
applyTabDropEnd({ activeData, overData });
} else if (overData?.kind === "split-pane-drop") {
applyPaneDropEnd({ activeData, overData });
}
}
setDropPreview(null);
setTabDropPreview(null);
},
[applyTabDropEnd, applyPaneDropEnd],
);
return (
<RenderProfile id="SplitContainer">
<DndContext
sensors={sensors}
collisionDetection={dropCollisionDetection}
onDragStart={handleDragStart}
onDragMove={updateDropPreview}
onDragOver={updateDropPreview}
onDragCancel={handleDragCancel}
onDragEnd={handleDragEnd}
>
{splitRoot.usesFallbackStrip && <WindowChromeSafeArea placement="below" />}
<SplitNodeView
node={renderRoot}
workspaceKey={workspaceKey}
uiTabs={uiTabs}
focusedPaneId={layout.focusedPaneId}
normalizedServerId={normalizedServerId}
normalizedWorkspaceId={normalizedWorkspaceId}
isWorkspaceFocused={isWorkspaceFocused}
hoveredCloseTabKey={hoveredCloseTabKey}
setHoveredCloseTabKey={setHoveredCloseTabKey}
closingTabIds={closingTabIds}
onNavigateTab={onNavigateTab}
onCloseTab={onCloseTab}
onCopyResumeCommand={onCopyResumeCommand}
onCopyAgentId={onCopyAgentId}
onCopyFilePath={onCopyFilePath}
onReloadAgent={onReloadAgent}
onRenameTab={onRenameTab}
onCloseTabsToLeft={onCloseTabsToLeft}
onCloseTabsToRight={onCloseTabsToRight}
onCloseOtherTabs={onCloseOtherTabs}
onCreateDraftTab={onCreateDraftTab}
onCreateTerminalTab={onCreateTerminalTab}
onCreateBrowserTab={onCreateBrowserTab}
showCreateBrowserTab={showCreateBrowserTab}
buildPaneContentModel={buildPaneContentModel}
onFocusPane={onFocusPane}
onSplitPane={onSplitPane}
onSplitPaneEmpty={onSplitPaneEmpty}
onResizeSplit={onResizeSplit}
onReorderTabsInPane={onReorderTabsInPane}
renderPaneEmptyState={renderPaneEmptyState}
activeDragTabId={activeDragTabId}
showDropZones={activeDragTabId !== null}
dropPreview={dropPreview}
tabDropPreview={tabDropPreview}
windowChromeCorners={splitRoot.usesFallbackStrip ? "none" : windowChromeCorners}
/>
<DragOverlay dropAnimation={null}>
{activeDragTabId ? (
<DragOverlayTabChip
tabId={activeDragTabId}
uiTabs={uiTabs}
normalizedServerId={normalizedServerId}
normalizedWorkspaceId={normalizedWorkspaceId}
/>
) : null}
</DragOverlay>
</DndContext>
</RenderProfile>
);
}
function DragOverlayTabChip({
tabId,
uiTabs,
normalizedServerId,
normalizedWorkspaceId,
}: {
tabId: string;
uiTabs: WorkspaceTab[];
normalizedServerId: string;
normalizedWorkspaceId: string;
}) {
const tab = uiTabs.find((t) => t.tabId === tabId);
const descriptor = useMemo<WorkspaceTabDescriptor | null>(
() =>
tab
? {
key: tab.tabId,
tabId: tab.tabId,
kind: tab.target.kind,
target: tab.target,
}
: null,
[tab],
);
if (!descriptor) {
return null;
}
return (
<DragOverlayTabChipInner
tab={descriptor}
normalizedServerId={normalizedServerId}
normalizedWorkspaceId={normalizedWorkspaceId}
/>
);
}
function DragOverlayTabChipInner({
tab,
normalizedServerId,
normalizedWorkspaceId,
}: {
tab: WorkspaceTabDescriptor;
normalizedServerId: string;
normalizedWorkspaceId: string;
}) {
const { t } = useTranslation();
const { theme } = useUnistyles();
const chipStyle = useMemo(
() => [
styles.dragOverlayChip,
{
backgroundColor: theme.colors.surface1,
borderColor: theme.colors.borderAccent,
},
],
[theme.colors.surface1, theme.colors.borderAccent],
);
const chipLabelStyle = useMemo(
() => [styles.dragOverlayLabel, { color: theme.colors.foreground }],
[theme.colors.foreground],
);
return (
<WorkspaceTabPresentationResolver
tab={tab}
serverId={normalizedServerId}
workspaceId={normalizedWorkspaceId}
>
{(presentation) => {
const label =
presentation.titleState === "loading" ? t("common.states.loading") : presentation.label;
return (
<View style={chipStyle}>
<WorkspaceTabIcon presentation={presentation} active size={14} />
<Text numberOfLines={1} style={chipLabelStyle}>
{label}
</Text>
</View>
);
}}
</WorkspaceTabPresentationResolver>
);
}
function SplitGroupChild({ flex, children }: { flex: number; children: ReactNode }) {
const childStyle = useMemo(() => [styles.groupChild, { flex }], [flex]);
return <View style={childStyle}>{children}</View>;
}
function SplitNodeView({
node,
workspaceKey,
uiTabs,
focusedPaneId,
normalizedServerId,
normalizedWorkspaceId,
isWorkspaceFocused,
hoveredCloseTabKey,
setHoveredCloseTabKey,
closingTabIds,
onNavigateTab,
onCloseTab,
onCopyResumeCommand,
onCopyAgentId,
onCopyFilePath,
onReloadAgent,
onRenameTab,
onCloseTabsToLeft,
onCloseTabsToRight,
onCloseOtherTabs,
onCreateDraftTab,
onCreateTerminalTab,
onCreateBrowserTab,
showCreateBrowserTab,
buildPaneContentModel,
onFocusPane,
onSplitPane,
onSplitPaneEmpty,
onResizeSplit,
onReorderTabsInPane,
renderPaneEmptyState,
activeDragTabId,
showDropZones,
dropPreview,
tabDropPreview,
windowChromeCorners,
}: SplitNodeViewProps) {
const groupId = node.kind === "group" ? node.group.id : null;
const groupDirection = node.kind === "group" ? node.group.direction : null;
const storedGroupSizes = useWorkspaceLayoutStore((state) =>
groupId ? state.splitSizesByWorkspace[workspaceKey]?.[groupId] : undefined,
);
const groupStyle = useMemo(
() => [
styles.group,
groupDirection === "horizontal" ? styles.groupHorizontal : styles.groupVertical,
],
[groupDirection],
);
if (node.kind === "pane") {
return (
<WindowChromeRegion corners={windowChromeCorners}>
<SplitPaneView
pane={node.pane}
uiTabs={uiTabs}
isFocused={node.pane.id === focusedPaneId}
normalizedServerId={normalizedServerId}
normalizedWorkspaceId={normalizedWorkspaceId}
isWorkspaceFocused={isWorkspaceFocused}
hoveredCloseTabKey={hoveredCloseTabKey}
setHoveredCloseTabKey={setHoveredCloseTabKey}
closingTabIds={closingTabIds}
onNavigateTab={onNavigateTab}
onCloseTab={onCloseTab}
onCopyResumeCommand={onCopyResumeCommand}
onCopyAgentId={onCopyAgentId}
onCopyFilePath={onCopyFilePath}
onReloadAgent={onReloadAgent}
onRenameTab={onRenameTab}
onCloseTabsToLeft={onCloseTabsToLeft}
onCloseTabsToRight={onCloseTabsToRight}
onCloseOtherTabs={onCloseOtherTabs}
onCreateDraftTab={onCreateDraftTab}
onCreateTerminalTab={onCreateTerminalTab}
onCreateBrowserTab={onCreateBrowserTab}
showCreateBrowserTab={showCreateBrowserTab}
buildPaneContentModel={buildPaneContentModel}
onFocusPane={onFocusPane}
onSplitPane={onSplitPane}
onSplitPaneEmpty={onSplitPaneEmpty}
onReorderTabsInPane={onReorderTabsInPane}
renderPaneEmptyState={renderPaneEmptyState}
activeDragTabId={activeDragTabId}
showDropZones={showDropZones}
dropPreview={dropPreview}
tabDropPreview={tabDropPreview}
/>
</WindowChromeRegion>
);
}
const groupSizes = storedGroupSizes ?? node.group.sizes;
return (
<View style={groupStyle}>
{node.group.children.map((child, index) => (
<Fragment key={getNodeKey(child)}>
<SplitGroupChild flex={groupSizes[index] ?? 1}>
<SplitNodeView
node={child}
workspaceKey={workspaceKey}
uiTabs={uiTabs}
focusedPaneId={focusedPaneId}
normalizedServerId={normalizedServerId}
normalizedWorkspaceId={normalizedWorkspaceId}
isWorkspaceFocused={isWorkspaceFocused}
hoveredCloseTabKey={hoveredCloseTabKey}
setHoveredCloseTabKey={setHoveredCloseTabKey}
closingTabIds={closingTabIds}
onNavigateTab={onNavigateTab}
onCloseTab={onCloseTab}
onCopyResumeCommand={onCopyResumeCommand}
onCopyAgentId={onCopyAgentId}
onCopyFilePath={onCopyFilePath}
onReloadAgent={onReloadAgent}
onRenameTab={onRenameTab}
onCloseTabsToLeft={onCloseTabsToLeft}
onCloseTabsToRight={onCloseTabsToRight}
onCloseOtherTabs={onCloseOtherTabs}
onCreateDraftTab={onCreateDraftTab}
onCreateTerminalTab={onCreateTerminalTab}
onCreateBrowserTab={onCreateBrowserTab}
showCreateBrowserTab={showCreateBrowserTab}
buildPaneContentModel={buildPaneContentModel}
onFocusPane={onFocusPane}
onSplitPane={onSplitPane}
onSplitPaneEmpty={onSplitPaneEmpty}
onResizeSplit={onResizeSplit}
onReorderTabsInPane={onReorderTabsInPane}
renderPaneEmptyState={renderPaneEmptyState}
activeDragTabId={activeDragTabId}
showDropZones={showDropZones}
dropPreview={dropPreview}
tabDropPreview={tabDropPreview}
windowChromeCorners={windowChromeCorners}
/>
</SplitGroupChild>
{index < node.group.children.length - 1 ? (
<ResizeHandle
direction={node.group.direction}
groupId={node.group.id}
index={index}
sizes={groupSizes}
onResizeSplit={onResizeSplit}
/>
) : null}
</Fragment>
))}
</View>
);
}
function SplitPaneView({
pane,
uiTabs,
isFocused,
normalizedServerId,
normalizedWorkspaceId,
isWorkspaceFocused,
hoveredCloseTabKey,
setHoveredCloseTabKey,
closingTabIds,
onNavigateTab,
onCloseTab,
onCopyResumeCommand,
onCopyAgentId,
onCopyFilePath,
onReloadAgent,
onRenameTab,
onCloseTabsToLeft,
onCloseTabsToRight,
onCloseOtherTabs,
onCreateDraftTab,
onCreateTerminalTab,
onCreateBrowserTab,
showCreateBrowserTab,
buildPaneContentModel,
onFocusPane,
onSplitPane: _onSplitPane,
onSplitPaneEmpty,
onReorderTabsInPane,
renderPaneEmptyState,
activeDragTabId,
showDropZones,
dropPreview,
tabDropPreview,
}: SplitPaneViewProps) {
const { theme: _theme } = useUnistyles();
const paneRef = useRef<View | null>(null);
const stableOnFocusPane = useStableEvent(onFocusPane);
const paneState = useMemo(
() =>
deriveWorkspacePaneState({
pane,
tabs: uiTabs,
}),
[pane, uiTabs],
);
const paneTabs = useMemo(() => paneState.tabs.map((tab) => tab.descriptor), [paneState.tabs]);
const paneTabIds = useMemo(() => paneTabs.map((tab) => tab.tabId), [paneTabs]);
const tabDescriptorMap = useStableTabDescriptorMap(paneTabs);
const activeTabDescriptor = paneState.activeTab?.descriptor ?? null;
const { mountedTabIds } = useMountedTabSet({
activeTabId: activeTabDescriptor?.tabId ?? null,
allTabIds: paneTabIds,
cap: 3,
});
const mountedPaneTabIds = useMemo(
() => paneTabIds.filter((tabId) => mountedTabIds.has(tabId)),
[mountedTabIds, paneTabIds],
);
const desktopTabRowItems = useMemo<WorkspaceDesktopTabRowItem[]>(
() =>
paneTabs.map((tab) => ({
tab,
isActive: tab.key === activeTabDescriptor?.key,
isCloseHovered: hoveredCloseTabKey === tab.key,
isClosingTab: closingTabIds.has(tab.tabId),
})),
[activeTabDescriptor?.key, closingTabIds, hoveredCloseTabKey, paneTabs],
);
useEffect(() => {
if (isNative) {
return () => {};
}
const rawRef: unknown = paneRef.current;
if (!(rawRef instanceof HTMLElement)) {
return () => {};
}
const paneElement = rawRef;
const handlePanePointerDown = (event: PointerEvent) => {
if (!shouldFocusPaneFromEventTarget(event.target)) {
return;
}
stableOnFocusPane(pane.id);
};
const handlePaneFocusIn = (event: FocusEvent) => {
if (!shouldFocusPaneFromEventTarget(event.target)) {
return;
}
stableOnFocusPane(pane.id);
};
paneElement.addEventListener("pointerdown", handlePanePointerDown, true);
paneElement.addEventListener("focusin", handlePaneFocusIn, true);
return () => {
paneElement.removeEventListener("pointerdown", handlePanePointerDown, true);
paneElement.removeEventListener("focusin", handlePaneFocusIn, true);
};
}, [stableOnFocusPane, pane.id]);
const paneId = pane.id;
const handleCloseTabsToLeft = useCallback(
(tabId: string) => onCloseTabsToLeft(tabId, paneTabs),
[onCloseTabsToLeft, paneTabs],
);
const handleCloseTabsToRight = useCallback(
(tabId: string) => onCloseTabsToRight(tabId, paneTabs),
[onCloseTabsToRight, paneTabs],
);
const handleCloseOtherTabs = useCallback(
(tabId: string) => onCloseOtherTabs(tabId, paneTabs),
[onCloseOtherTabs, paneTabs],
);
const handleReorderTabs = useCallback(
(nextTabs: WorkspaceTabDescriptor[]) => {
onReorderTabsInPane(
paneId,
nextTabs.map((tab) => tab.tabId),
);
},
[onReorderTabsInPane, paneId],
);
const handleSplitRight = useCallback(
() => onSplitPaneEmpty({ targetPaneId: paneId, position: "right" }),
[onSplitPaneEmpty, paneId],
);
const handleSplitDown = useCallback(
() => onSplitPaneEmpty({ targetPaneId: paneId, position: "bottom" }),
[onSplitPaneEmpty, paneId],
);
return (
<RenderProfile id={`SplitPaneView:${pane.id}`}>
<View ref={paneRef} collapsable={false} style={styles.pane}>
<WindowChromeSafeArea placement="inline" style={styles.paneTabs}>
<TitlebarDragRegion />
<WorkspaceDesktopTabsRow
paneId={pane.id}
isFocused={isFocused}
tabs={desktopTabRowItems}
normalizedServerId={normalizedServerId}
normalizedWorkspaceId={normalizedWorkspaceId}
setHoveredCloseTabKey={setHoveredCloseTabKey}
onNavigateTab={onNavigateTab}
onCloseTab={onCloseTab}
onCopyResumeCommand={onCopyResumeCommand}
onCopyAgentId={onCopyAgentId}
onCopyFilePath={onCopyFilePath}
onReloadAgent={onReloadAgent}
onRenameTab={onRenameTab}
onCloseTabsToLeft={handleCloseTabsToLeft}
onCloseTabsToRight={handleCloseTabsToRight}
onCloseOtherTabs={handleCloseOtherTabs}
onCreateDraftTab={onCreateDraftTab}
onCreateTerminalTab={onCreateTerminalTab}
onCreateBrowserTab={onCreateBrowserTab}
showCreateBrowserTab={showCreateBrowserTab}
onReorderTabs={handleReorderTabs}
onSplitRight={handleSplitRight}
onSplitDown={handleSplitDown}
externalDndContext
activeDragTabId={activeDragTabId}
tabDropPreviewIndex={
tabDropPreview?.paneId === pane.id ? tabDropPreview.indicatorIndex : null
}
/>
</WindowChromeSafeArea>
<View style={styles.paneContent}>
{mountedPaneTabIds.length > 0
? mountedPaneTabIds.map((tabId) => {
const tabDescriptor = tabDescriptorMap.get(tabId);
if (!tabDescriptor) {
return null;
}
return (
<MountedTabSlot
key={tabId}
tabDescriptor={tabDescriptor}
isVisible={tabId === activeTabDescriptor?.tabId}
isWorkspaceFocused={isWorkspaceFocused}
isPaneFocused={isFocused && tabId === activeTabDescriptor?.tabId}
paneId={pane.id}
onFocusPane={stableOnFocusPane}
buildPaneContentModel={buildPaneContentModel}
/>
);
})
: (renderPaneEmptyState?.() ?? null)}
<SplitDropZone paneId={pane.id} active={showDropZones} preview={dropPreview} />
</View>
</View>
</RenderProfile>
);
}
function collectPanesById(node: SplitNode): Map<string, SplitPane> {
const next = new Map<string, SplitPane>();
function visit(current: SplitNode) {
if (current.kind === "pane") {
next.set(current.pane.id, current.pane);
return;
}
for (const child of current.group.children) {
visit(child);
}
}
visit(node);
return next;
}
function getNodeKey(node: SplitNode): string {
if (node.kind === "pane") {
return node.pane.id;
}
return node.group.id;
}
function wrapRootPaneForStableMount(node: SplitNode): SplitNode {
if (node.kind === "group") {
return node;
}
return {
kind: "group",
group: {
id: `root:${node.pane.id}`,
direction: "horizontal",
children: [node],
sizes: [1],
},
};
}
const styles = StyleSheet.create((theme) => ({
group: {
flex: 1,
minWidth: 0,
minHeight: 0,
},
groupHorizontal: {
flexDirection: "row",
},
groupVertical: {
flexDirection: "column",
},
groupChild: {
flexBasis: 0,
minWidth: 0,
minHeight: 0,
},
pane: {
position: "relative",
flex: 1,
minWidth: 0,
minHeight: 0,
backgroundColor: theme.colors.surface0,
overflow: "hidden",
},
paneTabs: {
position: "relative",
minWidth: 0,
},
paneContent: {
position: "relative",
flex: 1,
minWidth: 0,
minHeight: 0,
},
dragOverlayChip: {
flexDirection: "row",
alignItems: "center",
gap: theme.spacing[2],
paddingHorizontal: theme.spacing[3],
paddingVertical: theme.spacing[1],
borderRadius: theme.borderRadius.md,
borderWidth: 1,
maxWidth: 200,
},
dragOverlayLabel: {
fontSize: theme.fontSize.sm,
flexShrink: 1,
},
}));