Files
Termix/src/ui/shell/SplitView.tsx
T
LukeGus 5777351145 v2.3.0
2026-05-28 22:29:20 -05:00

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TypeScript

import React, { useState, useRef, useEffect, memo, useCallback } from "react";
import { useTranslation } from "react-i18next";
import { splitDragState, notifyDragEnd } from "@/lib/splitDragging";
import { tabIcon } from "@/shell/tabUtils";
import type { Tab, SplitMode } from "@/types/ui-types";
// ─── useSplitSizes ────────────────────────────────────────────────────────────
type RowColSizes = number[][];
function defaultSizes(mode: SplitMode): {
rowSizes: number[];
rowColSizes: RowColSizes;
} {
switch (mode) {
case "2-way":
return { rowSizes: [100], rowColSizes: [[50, 50]] };
case "3-way":
return { rowSizes: [50, 50], rowColSizes: [[50, 50], [100]] };
case "3-way-horizontal":
return { rowSizes: [50, 50], rowColSizes: [[50, 50], [100]] };
case "4-way":
return {
rowSizes: [50, 50],
rowColSizes: [
[50, 50],
[50, 50],
],
};
case "5-way":
return {
rowSizes: [50, 50],
rowColSizes: [
[33.3, 33.3, 33.4],
[33.3, 66.7],
],
};
case "6-way":
return {
rowSizes: [50, 50],
rowColSizes: [
[33.3, 33.3, 33.4],
[33.3, 33.3, 33.4],
],
};
default:
return { rowSizes: [100], rowColSizes: [[100]] };
}
}
function useSplitSizes(splitMode: SplitMode) {
const init = defaultSizes(splitMode);
const [rowSizes, setRowSizes] = useState(init.rowSizes);
const [rowColSizes, setRowColSizes] = useState<RowColSizes>(init.rowColSizes);
const [isDragging, setIsDragging] = useState(false);
const containerRef = useRef<HTMLDivElement>(null);
useEffect(() => {
const d = defaultSizes(splitMode);
setRowSizes(d.rowSizes);
setRowColSizes(d.rowColSizes);
}, [splitMode]);
function reset() {
const d = defaultSizes(splitMode);
setRowSizes(d.rowSizes);
setRowColSizes(d.rowColSizes);
}
function startDrag() {
splitDragState.active = true;
setIsDragging(true);
}
function endDrag() {
splitDragState.active = false;
setIsDragging(false);
notifyDragEnd();
}
function onRowDivider(e: React.MouseEvent, rowIdx: number) {
e.preventDefault();
const container = containerRef.current;
if (!container) return;
startDrag();
const totalH = container.getBoundingClientRect().height;
const startY = e.clientY;
const a = rowSizes[rowIdx],
b = rowSizes[rowIdx + 1];
function onMove(ev: MouseEvent) {
const na = Math.max(
10,
Math.min(a + b - 10, a + ((ev.clientY - startY) / totalH) * 100),
);
setRowSizes((prev) => {
const n = [...prev];
n[rowIdx] = na;
n[rowIdx + 1] = a + b - na;
return n;
});
}
function onUp() {
endDrag();
window.removeEventListener("mousemove", onMove);
window.removeEventListener("mouseup", onUp);
}
window.addEventListener("mousemove", onMove);
window.addEventListener("mouseup", onUp);
}
function onRowDividerTouch(e: React.TouchEvent, rowIdx: number) {
const container = containerRef.current;
if (!container) return;
startDrag();
const totalH = container.getBoundingClientRect().height;
const startY = e.touches[0].clientY;
const a = rowSizes[rowIdx],
b = rowSizes[rowIdx + 1];
function onMove(ev: TouchEvent) {
const na = Math.max(
10,
Math.min(
a + b - 10,
a + ((ev.touches[0].clientY - startY) / totalH) * 100,
),
);
setRowSizes((prev) => {
const n = [...prev];
n[rowIdx] = na;
n[rowIdx + 1] = a + b - na;
return n;
});
}
function onUp() {
endDrag();
window.removeEventListener("touchmove", onMove);
window.removeEventListener("touchend", onUp);
}
window.addEventListener("touchmove", onMove, { passive: false });
window.addEventListener("touchend", onUp);
}
function onColDivider(e: React.MouseEvent, rowIdx: number, colIdx: number) {
e.preventDefault();
const container = containerRef.current;
if (!container) return;
startDrag();
const totalW = container.getBoundingClientRect().width;
const startX = e.clientX;
const cols = rowColSizes[rowIdx];
const a = cols[colIdx],
b = cols[colIdx + 1];
function onMove(ev: MouseEvent) {
const na = Math.max(
10,
Math.min(a + b - 10, a + ((ev.clientX - startX) / totalW) * 100),
);
setRowColSizes((prev) => {
const next = prev.map((r) => [...r]);
next[rowIdx][colIdx] = na;
next[rowIdx][colIdx + 1] = a + b - na;
return next;
});
}
function onUp() {
endDrag();
window.removeEventListener("mousemove", onMove);
window.removeEventListener("mouseup", onUp);
}
window.addEventListener("mousemove", onMove);
window.addEventListener("mouseup", onUp);
}
function onColDividerTouch(
e: React.TouchEvent,
rowIdx: number,
colIdx: number,
) {
const container = containerRef.current;
if (!container) return;
startDrag();
const totalW = container.getBoundingClientRect().width;
const startX = e.touches[0].clientX;
const cols = rowColSizes[rowIdx];
const a = cols[colIdx],
b = cols[colIdx + 1];
function onMove(ev: TouchEvent) {
const na = Math.max(
10,
Math.min(
a + b - 10,
a + ((ev.touches[0].clientX - startX) / totalW) * 100,
),
);
setRowColSizes((prev) => {
const next = prev.map((r) => [...r]);
next[rowIdx][colIdx] = na;
next[rowIdx][colIdx + 1] = a + b - na;
return next;
});
}
function onUp() {
endDrag();
window.removeEventListener("touchmove", onMove);
window.removeEventListener("touchend", onUp);
}
window.addEventListener("touchmove", onMove, { passive: false });
window.addEventListener("touchend", onUp);
}
return {
rowSizes,
rowColSizes,
isDragging,
containerRef,
reset,
onRowDivider,
onRowDividerTouch,
onColDivider,
onColDividerTouch,
};
}
// ─── Dividers ─────────────────────────────────────────────────────────────────
function ColDivider({
onMouseDown,
onTouchStart,
}: {
onMouseDown: (e: React.MouseEvent) => void;
onTouchStart: (e: React.TouchEvent) => void;
}) {
return (
<div className="relative w-0 shrink-0 z-10">
<div
onMouseDown={onMouseDown}
onTouchStart={onTouchStart}
className="absolute inset-y-0 -left-2 -right-2 cursor-col-resize flex items-center justify-center group"
>
<div className="w-px h-full bg-border group-hover:bg-accent-brand/60 transition-colors pointer-events-none" />
</div>
</div>
);
}
function RowDivider({
onMouseDown,
onTouchStart,
}: {
onMouseDown: (e: React.MouseEvent) => void;
onTouchStart: (e: React.TouchEvent) => void;
}) {
return (
<div className="relative h-0 w-full shrink-0 z-10">
<div
onMouseDown={onMouseDown}
onTouchStart={onTouchStart}
className="absolute inset-x-0 -top-2 -bottom-2 cursor-row-resize flex flex-col items-center justify-center group"
>
<div className="h-px w-full bg-border group-hover:bg-accent-brand/60 transition-colors pointer-events-none" />
</div>
</div>
);
}
// ─── Pane ─────────────────────────────────────────────────────────────────────
function PaneHeader({
tab,
paneIndex,
}: {
tab: Tab | null;
paneIndex: number;
}) {
const { t } = useTranslation();
return (
<div className="flex items-center gap-1.5 px-2.5 h-7 shrink-0 bg-sidebar border-b border-border text-xs font-medium text-muted-foreground select-none">
{tab ? (
<>
<span className="opacity-60">{tabIcon(tab.type)}</span>
<span className="truncate text-foreground">
{tab.type === "dashboard" ? "Dashboard" : tab.label}
</span>
</>
) : (
<span className="opacity-40">
{t("splitScreen.paneEmpty", { index: paneIndex + 1 })}
</span>
)}
</div>
);
}
function EmptyPane() {
const { t } = useTranslation();
return (
<div className="flex flex-col items-center justify-center w-full h-full gap-2 text-muted-foreground/30 bg-background">
<div className="grid grid-cols-2 gap-1">
<div className="size-5 border-2 border-current rounded-sm" />
<div className="size-5 border-2 border-current rounded-sm" />
<div className="size-5 border-2 border-current rounded-sm" />
<div className="size-5 border-2 border-current rounded-sm" />
</div>
<span className="text-xs">{t("splitScreen.noTabAssigned")}</span>
</div>
);
}
const Pane = memo(function Pane({
tab,
paneIndex,
isDragging,
onPaneContentRef,
}: {
tab: Tab | null;
paneIndex: number;
isDragging: boolean;
onPaneContentRef?: (paneIndex: number, el: HTMLDivElement | null) => void;
}) {
const contentRef = useCallback(
(el: HTMLDivElement | null) => {
onPaneContentRef?.(paneIndex, el);
},
[paneIndex, onPaneContentRef],
);
return (
<div className="relative flex flex-col w-full h-full min-w-0 min-h-0 overflow-hidden">
<PaneHeader tab={tab} paneIndex={paneIndex} />
<div className="flex-1 min-h-0 overflow-hidden relative">
{tab ? (
<div ref={contentRef} className="absolute inset-0" />
) : (
<EmptyPane />
)}
</div>
{isDragging && (
<div className="absolute inset-0 z-10" style={{ cursor: "inherit" }} />
)}
</div>
);
});
// ─── Row (top-level so React never sees a new component type) ─────────────────
const Row = memo(function Row({
rowIdx,
paneIndices,
rowHeight,
colWidths,
paneTabIds,
tabs,
isDragging,
onColDivider,
onColDividerTouch,
onPaneContentRef,
}: {
rowIdx: number;
paneIndices: number[];
rowHeight: number;
colWidths: number[];
paneTabIds: (string | null)[];
tabs: Tab[];
isDragging: boolean;
onColDivider: (e: React.MouseEvent, rowIdx: number, colIdx: number) => void;
onColDividerTouch: (
e: React.TouchEvent,
rowIdx: number,
colIdx: number,
) => void;
onPaneContentRef?: (paneIndex: number, el: HTMLDivElement | null) => void;
}) {
const widths = colWidths ?? [];
return (
<div className="flex min-h-0 w-full" style={{ height: `${rowHeight}%` }}>
{paneIndices.map((pIdx, ci) => {
const tabId = paneTabIds[pIdx];
const tab =
tabId != null ? (tabs.find((t) => t.id === tabId) ?? null) : null;
return (
<React.Fragment key={pIdx}>
<div
className="min-w-0 min-h-0 overflow-hidden"
style={{ width: `${widths[ci] ?? 100 / paneIndices.length}%` }}
>
<Pane
tab={tab}
paneIndex={pIdx}
isDragging={isDragging}
onPaneContentRef={onPaneContentRef}
/>
</div>
{ci < paneIndices.length - 1 && (
<ColDivider
onMouseDown={(e) => onColDivider(e, rowIdx, ci)}
onTouchStart={(e) => onColDividerTouch(e, rowIdx, ci)}
/>
)}
</React.Fragment>
);
})}
</div>
);
});
// ─── SplitView ────────────────────────────────────────────────────────────────
export const SplitView = memo(function SplitView({
tabs,
paneTabIds,
splitMode,
onTerminalResize,
onPaneContentRef,
}: {
tabs: Tab[];
paneTabIds: (string | null)[];
splitMode: SplitMode;
onTerminalResize?: () => void;
onPaneContentRef?: (paneIndex: number, el: HTMLDivElement | null) => void;
}) {
const {
rowSizes,
rowColSizes,
isDragging,
containerRef,
reset,
onRowDivider,
onRowDividerTouch,
onColDivider,
onColDividerTouch,
} = useSplitSizes(splitMode);
useEffect(() => {
if (!isDragging) {
const id = requestAnimationFrame(() => onTerminalResize?.());
return () => cancelAnimationFrame(id);
}
}, [isDragging, onTerminalResize]);
// Inline pane lookup for the non-Row layouts (3-way, 3-way-horizontal)
function tab(idx: number): Tab | null {
const tabId = paneTabIds[idx];
return tabId != null ? (tabs.find((t) => t.id === tabId) ?? null) : null;
}
return (
<div
ref={containerRef}
className="flex flex-col w-full h-full min-h-0 overflow-hidden relative"
>
<button
onClick={reset}
className="absolute top-1 right-1 z-20 text-xs text-muted-foreground hover:text-foreground bg-background/80 border border-border px-1.5 py-0.5 leading-tight"
title="Reset to equal split"
>
Reset
</button>
{splitMode === "2-way" && (
<Row
rowIdx={0}
paneIndices={[0, 1]}
rowHeight={rowSizes[0]}
colWidths={rowColSizes[0] ?? []}
paneTabIds={paneTabIds}
tabs={tabs}
isDragging={isDragging}
onColDivider={onColDivider}
onColDividerTouch={onColDividerTouch}
onPaneContentRef={onPaneContentRef}
/>
)}
{splitMode === "3-way" && (
<div className="flex w-full h-full min-h-0">
<div
className="min-w-0 min-h-0 overflow-hidden"
style={{ width: `${rowColSizes[0][0]}%` }}
>
<Pane
tab={tab(0)}
paneIndex={0}
isDragging={isDragging}
onPaneContentRef={onPaneContentRef}
/>
</div>
<ColDivider
onMouseDown={(e) => onColDivider(e, 0, 0)}
onTouchStart={(e) => onColDividerTouch(e, 0, 0)}
/>
<div className="flex flex-col flex-1 min-h-0">
<div
className="min-h-0 overflow-hidden"
style={{ height: `${rowSizes[0]}%` }}
>
<Pane
tab={tab(1)}
paneIndex={1}
isDragging={isDragging}
onPaneContentRef={onPaneContentRef}
/>
</div>
<RowDivider
onMouseDown={(e) => onRowDivider(e, 0)}
onTouchStart={(e) => onRowDividerTouch(e, 0)}
/>
<div
className="min-h-0 overflow-hidden"
style={{ height: `${rowSizes[1]}%` }}
>
<Pane
tab={tab(2)}
paneIndex={2}
isDragging={isDragging}
onPaneContentRef={onPaneContentRef}
/>
</div>
</div>
</div>
)}
{splitMode === "3-way-horizontal" && (
<div className="flex flex-col w-full h-full min-h-0">
<div
className="flex min-h-0 overflow-hidden"
style={{ height: `${rowSizes[0]}%` }}
>
<div
className="min-w-0 min-h-0 overflow-hidden"
style={{ width: `${rowColSizes[0][0]}%` }}
>
<Pane
tab={tab(0)}
paneIndex={0}
isDragging={isDragging}
onPaneContentRef={onPaneContentRef}
/>
</div>
<ColDivider
onMouseDown={(e) => onColDivider(e, 0, 0)}
onTouchStart={(e) => onColDividerTouch(e, 0, 0)}
/>
<div className="flex-1 min-w-0 min-h-0 overflow-hidden">
<Pane
tab={tab(1)}
paneIndex={1}
isDragging={isDragging}
onPaneContentRef={onPaneContentRef}
/>
</div>
</div>
<RowDivider
onMouseDown={(e) => onRowDivider(e, 0)}
onTouchStart={(e) => onRowDividerTouch(e, 0)}
/>
<div className="flex-1 min-h-0 overflow-hidden">
<Pane
tab={tab(2)}
paneIndex={2}
isDragging={isDragging}
onPaneContentRef={onPaneContentRef}
/>
</div>
</div>
)}
{splitMode === "4-way" && (
<div className="flex flex-col w-full h-full min-h-0">
<Row
rowIdx={0}
paneIndices={[0, 1]}
rowHeight={rowSizes[0]}
colWidths={rowColSizes[0] ?? []}
paneTabIds={paneTabIds}
tabs={tabs}
isDragging={isDragging}
onColDivider={onColDivider}
onColDividerTouch={onColDividerTouch}
onPaneContentRef={onPaneContentRef}
/>
<RowDivider
onMouseDown={(e) => onRowDivider(e, 0)}
onTouchStart={(e) => onRowDividerTouch(e, 0)}
/>
<Row
rowIdx={1}
paneIndices={[2, 3]}
rowHeight={rowSizes[1]}
colWidths={rowColSizes[1] ?? []}
paneTabIds={paneTabIds}
tabs={tabs}
isDragging={isDragging}
onColDivider={onColDivider}
onColDividerTouch={onColDividerTouch}
onPaneContentRef={onPaneContentRef}
/>
</div>
)}
{splitMode === "5-way" && (
<div className="flex flex-col w-full h-full min-h-0">
<Row
rowIdx={0}
paneIndices={[0, 1, 2]}
rowHeight={rowSizes[0]}
colWidths={rowColSizes[0] ?? []}
paneTabIds={paneTabIds}
tabs={tabs}
isDragging={isDragging}
onColDivider={onColDivider}
onColDividerTouch={onColDividerTouch}
onPaneContentRef={onPaneContentRef}
/>
<RowDivider
onMouseDown={(e) => onRowDivider(e, 0)}
onTouchStart={(e) => onRowDividerTouch(e, 0)}
/>
<Row
rowIdx={1}
paneIndices={[3, 4]}
rowHeight={rowSizes[1]}
colWidths={rowColSizes[1] ?? []}
paneTabIds={paneTabIds}
tabs={tabs}
isDragging={isDragging}
onColDivider={onColDivider}
onColDividerTouch={onColDividerTouch}
onPaneContentRef={onPaneContentRef}
/>
</div>
)}
{splitMode === "6-way" && (
<div className="flex flex-col w-full h-full min-h-0">
<Row
rowIdx={0}
paneIndices={[0, 1, 2]}
rowHeight={rowSizes[0]}
colWidths={rowColSizes[0] ?? []}
paneTabIds={paneTabIds}
tabs={tabs}
isDragging={isDragging}
onColDivider={onColDivider}
onColDividerTouch={onColDividerTouch}
onPaneContentRef={onPaneContentRef}
/>
<RowDivider
onMouseDown={(e) => onRowDivider(e, 0)}
onTouchStart={(e) => onRowDividerTouch(e, 0)}
/>
<Row
rowIdx={1}
paneIndices={[3, 4, 5]}
rowHeight={rowSizes[1]}
colWidths={rowColSizes[1] ?? []}
paneTabIds={paneTabIds}
tabs={tabs}
isDragging={isDragging}
onColDivider={onColDivider}
onColDividerTouch={onColDividerTouch}
onPaneContentRef={onPaneContentRef}
/>
</div>
)}
</div>
);
});