@mapka/split-panel/lib/components/SplitPanel.js

Split panel for mapka

import { jsx as _jsx, jsxs as _jsxs, Fragment as _Fragment } from "react/jsx-runtime";
/** biome-ignore-all lint/correctness/useUniqueElementIds: later */
import { debounce } from "es-toolkit";
import { useCallback, useEffect, useRef } from "react";
const medianWidth = 10;
export function SplitPanel({ rightPanel, leftPanel }) {
    const splitPanelRef = useRef(null);
    const splitPanelRec = useRef(null);
    const medianRef = useRef(null);
    const resizing = useRef(false);
    useEffect(() => {
        const handlePointerDown = (event) => {
            event.stopPropagation();
            resizing.current = true;
            splitPanelRef.current?.setAttribute("data-resizing", "true");
        };
        medianRef.current?.addEventListener("pointerdown", handlePointerDown);
        return () => {
            medianRef.current?.removeEventListener("pointerdown", handlePointerDown);
        };
    }, []);
    useEffect(() => {
        const handlePointerUp = (event) => {
            event.stopPropagation();
            resizing.current = false;
            splitPanelRef.current?.setAttribute("data-resizing", "false");
        };
        medianRef.current?.addEventListener("pointerup", handlePointerUp);
        return () => {
            medianRef.current?.removeEventListener("pointerup", handlePointerUp);
        };
    }, []);
    useEffect(() => {
        const handleMouseMove = (event) => {
            if (resizing.current && splitPanelRef.current) {
                if (splitPanelRec.current && splitPanelRec.current.width > 700) {
                    const newMedianLeft = event.clientX - splitPanelRec.current.left;
                    splitPanelRef.current.style.gridTemplateColumns = `calc(${newMedianLeft}px - ${medianWidth / 2}px) ${medianWidth}px 1fr`;
                }
                if (splitPanelRec.current && splitPanelRec.current.width < 700) {
                    const newMedianTop = event.clientY - splitPanelRec.current.top;
                    splitPanelRef.current.style.gridTemplateRows = `calc(${newMedianTop}px - ${medianWidth / 2}px) ${medianWidth}px 1fr`;
                }
            }
        };
        splitPanelRef.current?.addEventListener("mousemove", handleMouseMove);
        return () => {
            splitPanelRef.current?.removeEventListener("mousemove", handleMouseMove);
        };
    }, []);
    const handleInit = useCallback((element) => {
        if (!element)
            return;
        const rect = element.getBoundingClientRect();
        splitPanelRef.current = element;
        splitPanelRec.current = rect;
        if (rect.width > 700) {
            element.setAttribute("data-direction", "col");
        }
        else {
            element.setAttribute("data-direction", "row");
        }
    }, []);
    useEffect(() => {
        if (splitPanelRef.current === null)
            return;
        const handleResize = debounce(() => {
            if (splitPanelRef.current) {
                const rect = splitPanelRef.current.getBoundingClientRect();
                splitPanelRec.current = rect;
                if (rect.width > 700) {
                    splitPanelRef.current.setAttribute("data-direction", "col");
                    splitPanelRef.current.style.removeProperty("grid-template-rows");
                    splitPanelRef.current.style.removeProperty("grid-template-columns");
                }
                else {
                    splitPanelRef.current.setAttribute("data-direction", "row");
                    splitPanelRef.current.style.removeProperty("grid-template-rows");
                    splitPanelRef.current.style.removeProperty("grid-template-columns");
                }
            }
        }, 100);
        const resizer = new ResizeObserver(handleResize);
        resizer.observe(splitPanelRef.current);
        return () => {
            resizer.disconnect();
        };
    }, []);
    return (_jsxs(_Fragment, { children: [_jsx("style", { children: `
        #mapka-split-panel[data-direction=col] { 
          display: grid;
          grid-template-columns: 1fr 10px 1fr;
          grid-template-rows: 1fr;
          min-height: 100%;
          max-height: 100%;
          min-width: 100%;
          max-width: 100%;
        }
        #mapka-split-panel([data-resizing=true][data-direction=col]){ cursor: col-resize; }
        #mapka-split-panel[data-direction=row] { 
          display: grid;
          grid-template-columns: 1fr;
          grid-template-rows: 1fr 10px 1fr;
          min-height: 100%;
          max-height: 100%;
          min-width: 100%;
          max-width: 100%;
        }
        #mapka-split-panel([data-resizing=true][data-direction=row]){ cursor: row-resize; }
        
        #mapka-split-panel([resizing]){ 
          user-select: none; 
        }
        #mapka-split-panel[data-direction=col] #median {
          inline-size: 10px;
          grid-column: 2 / 3; 
          background: grey;
        }
        #mapka-split-panel[data-direction=row] #median {
          block-size: 10px;
          grid-row: 2 / 3; 
          background: grey;
        }
        #mapka-split-panel[data-direction=col] #median:hover { 
          cursor: col-resize; 
        }
        #mapka-split-panel[data-direction=row] #median:hover { 
          cursor: row-resize; 
        }
        #mapka-split-panel[data-direction=col] #left-panel { 
          grid-column: 1 / 2; 
          grid-row: 1 / 1;
        }
        #mapka-split-panel[data-direction=row] #left-panel { 
          grid-column: 1 / 1; 
          grid-row: 1 / 2;
          max-width: 100%;
          overflow: hidden;
        }
        #mapka-split-panel[data-direction=col] #right-panel { 
          grid-column: 3 / 4; 
          grid-row: 1 / 1; 
          max-width: 100%;
          overflow: hidden;
        }
        #mapka-split-panel[data-direction=row] #right-panel { 
          grid-column: 1 / 1; 
          grid-row: 3 / 4; 
        }
        ` }), _jsxs("div", { id: "mapka-split-panel", "data-direction": "col", ref: handleInit, children: [_jsx("div", { id: "left-panel", children: leftPanel }), _jsx("div", { id: "median", ref: medianRef }), _jsx("div", { id: "right-panel", children: rightPanel })] })] }));
}