92 lines
3.1 KiB
TypeScript
92 lines
3.1 KiB
TypeScript
"use client";
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import { useCallback, useEffect, useRef } from "react";
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import { cn } from "@/lib/utils";
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interface ResizeHandleProps {
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onResizeStart?: () => void;
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onResize: (delta: number) => void;
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onResizeEnd?: () => void;
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onDoubleClick?: () => void;
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orientation?: "vertical" | "horizontal";
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className?: string;
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}
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const KEYBOARD_STEP = 10;
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export function ResizeHandle({ onResizeStart, onResize, onResizeEnd, onDoubleClick, orientation = "vertical", className }: ResizeHandleProps) {
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const isDragging = useRef(false);
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const startPos = useRef(0);
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const isHorizontal = orientation === "horizontal";
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const handleMouseDown = useCallback((e: React.MouseEvent) => {
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e.preventDefault();
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isDragging.current = true;
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startPos.current = isHorizontal ? e.clientY : e.clientX;
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document.body.style.cursor = isHorizontal ? "row-resize" : "col-resize";
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document.body.style.userSelect = "none";
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onResizeStart?.();
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}, [onResizeStart, isHorizontal]);
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const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
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let delta = 0;
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if (isHorizontal) {
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if (e.key === "ArrowUp") delta = -KEYBOARD_STEP;
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else if (e.key === "ArrowDown") delta = KEYBOARD_STEP;
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else return;
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} else {
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if (e.key === "ArrowLeft") delta = -KEYBOARD_STEP;
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else if (e.key === "ArrowRight") delta = KEYBOARD_STEP;
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else return;
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}
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e.preventDefault();
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onResize(delta);
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onResizeEnd?.();
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}, [onResize, onResizeEnd, isHorizontal]);
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useEffect(() => {
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const handleMouseMove = (e: MouseEvent) => {
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if (!isDragging.current) return;
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const delta = (isHorizontal ? e.clientY : e.clientX) - startPos.current;
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onResize(delta);
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};
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const handleMouseUp = () => {
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if (!isDragging.current) return;
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isDragging.current = false;
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document.body.style.cursor = "";
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document.body.style.userSelect = "";
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onResizeEnd?.();
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};
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document.addEventListener("mousemove", handleMouseMove);
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document.addEventListener("mouseup", handleMouseUp);
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return () => {
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document.removeEventListener("mousemove", handleMouseMove);
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document.removeEventListener("mouseup", handleMouseUp);
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};
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}, [onResize, onResizeEnd, isHorizontal]);
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return (
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<div
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role="separator"
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aria-orientation={isHorizontal ? "horizontal" : "vertical"}
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aria-label="Resize"
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tabIndex={0}
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onMouseDown={handleMouseDown}
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onKeyDown={handleKeyDown}
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onDoubleClick={onDoubleClick}
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className={cn(
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// Centered over the seam with negative margins so the handle adds no
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// net layout space (panes sit flush) while staying draggable.
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"flex-shrink-0 hover:bg-primary/30 active:bg-primary/50 transition-colors relative group z-10",
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"focus-visible:outline-none focus-visible:bg-primary/40 focus-visible:ring-2 focus-visible:ring-primary/50",
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isHorizontal ? "h-1 -my-0.5 cursor-row-resize bg-border" : "w-1 -mx-0.5 cursor-col-resize",
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className
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)}
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>
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<div className={cn("absolute", isHorizontal ? "inset-x-0 -top-1 -bottom-1" : "inset-y-0 -left-1 -right-1")} />
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</div>
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);
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}
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