@wix/design-system
Version:
@wix/design-system
190 lines (187 loc) • 8.12 kB
JavaScript
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _typeof = require("@babel/runtime/helpers/typeof");
exports.__esModule = true;
exports["default"] = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _react = _interopRequireWildcard(require("react"));
var _classnames = _interopRequireDefault(require("classnames"));
var _Item = _interopRequireDefault(require("./Item"));
var _utils = require("./utils");
var _jsxFileName = "/home/builduser/work/57e038ea7326c1ec/packages/wix-design-system/dist/cjs/NestableListBase/VirtualContainer.jsx";
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, "default": e }; if (null === e || "object" != _typeof(e) && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]); return f; })(e, t); }
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { (0, _defineProperty2["default"])(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
// Resolve childrenStyle.marginLeft to a numeric per-depth indent for the
// absolute layout. Accepts both numbers and "{n}px" strings.
function parseIndentPx(childrenStyle) {
var ml = childrenStyle && childrenStyle.marginLeft;
if (typeof ml === 'number' && Number.isFinite(ml)) {
return ml;
}
if (typeof ml === 'string') {
var n = parseInt(ml, 10);
return Number.isFinite(n) ? n : 0;
}
return 0;
}
var VirtualContainer = /*#__PURE__*/_react["default"].forwardRef(function VirtualContainer(_ref, containerRef) {
var _this = this;
var items = _ref.items,
childrenProperty = _ref.childrenProperty,
childrenStyle = _ref.childrenStyle,
renderAction = _ref.renderAction,
isRenderDraggingChildren = _ref.isRenderDraggingChildren,
theme = _ref.theme,
itemHeight = _ref.itemHeight,
viewportHeight = _ref.viewportHeight,
_ref$offscreenRowCoun = _ref.offscreenRowCount,
offscreenRowCount = _ref$offscreenRowCoun === void 0 ? 5 : _ref$offscreenRowCoun,
pinnedItemId = _ref.pinnedItemId;
var _useState = (0, _react.useState)(0),
_useState2 = (0, _slicedToArray2["default"])(_useState, 2),
scrollTop = _useState2[0],
setScrollTop = _useState2[1];
// Memoizing the row stream is what makes scrolling cheap. The action-row
// entries store truthiness only (no rendered React node), so this cache
// stays valid across drag-state changes — action-row styling depends on
// isDragging, but action-row *existence* depends only on stable props
// (actions/addItemLabel/maxDepth). We re-invoke renderAction at render
// time per visible action row to pick up live styling.
var rows = (0, _react.useMemo)(function () {
return (0, _utils.flattenVisible)({
items: items,
renderAction: renderAction,
childrenProperty: childrenProperty
});
}, [items, renderAction, childrenProperty]);
var indentPx = parseIndentPx(childrenStyle);
var totalHeight = rows.length * itemHeight;
var firstWindowIndex = Math.max(0, Math.floor(scrollTop / itemHeight) - offscreenRowCount);
var lastWindowIndex = Math.min(rows.length, Math.ceil((scrollTop + viewportHeight) / itemHeight) + offscreenRowCount);
var handleScroll = (0, _react.useCallback)(function (e) {
setScrollTop(e.currentTarget.scrollTop);
}, []);
var containerClass = (0, _classnames["default"])('nestable-container', 'nestable-top-container', theme && theme.topContainer);
var visible = [];
for (var i = firstWindowIndex; i < lastWindowIndex; i++) {
visible.push({
row: rows[i],
absoluteIndex: i
});
}
// Pin the focused/keyboard-moved row in the slice so its keyboard handlers
// survive scroll. Without this, arrow-key reorder across viewport edge
// unmounts the focused Item and onKeyUp dies.
if (pinnedItemId) {
var alreadyVisible = visible.some(function (v) {
return v.row.kind === 'item' && v.row.item.id === pinnedItemId;
});
if (!alreadyVisible) {
var pinnedIdx = rows.findIndex(function (r) {
return r.kind === 'item' && r.item.id === pinnedItemId;
});
if (pinnedIdx !== -1) {
visible.push({
row: rows[pinnedIdx],
absoluteIndex: pinnedIdx
});
}
}
}
return /*#__PURE__*/_react["default"].createElement("div", {
ref: containerRef,
className: containerClass,
onScroll: handleScroll,
style: {
height: viewportHeight,
overflowY: 'auto',
position: 'relative'
},
__self: this,
__source: {
fileName: _jsxFileName,
lineNumber: 92,
columnNumber: 5
}
}, /*#__PURE__*/_react["default"].createElement("div", {
style: {
height: totalHeight,
position: 'relative'
},
__self: this,
__source: {
fileName: _jsxFileName,
lineNumber: 102,
columnNumber: 7
}
}, visible.map(function (_ref2) {
var row = _ref2.row,
absoluteIndex = _ref2.absoluteIndex;
var top = absoluteIndex * itemHeight;
var left = (row.kind === 'item' ? row.treeDepth - 1 : row.depth - 1) * indentPx;
var positionStyle = {
position: 'absolute',
top: top,
left: left,
right: 0,
minHeight: itemHeight
};
if (row.kind === 'item') {
var itemForRender = row.isParentLocked ? _objectSpread(_objectSpread({}, row.item), {}, {
isParentLocked: true,
draggable: false
}) : row.item;
return /*#__PURE__*/_react["default"].createElement("div", {
key: "item-".concat(row.item.id),
style: positionStyle,
__self: _this,
__source: {
fileName: _jsxFileName,
lineNumber: 121,
columnNumber: 15
}
}, /*#__PURE__*/_react["default"].createElement(_Item["default"], {
id: row.item.id,
item: itemForRender,
index: row.index,
isVeryLastItem: row.isVeryLastItem,
siblings: row.siblings,
isRenderDraggingChildren: isRenderDraggingChildren,
position: row.position,
depth: (0, _utils.getDepth)(row.item, childrenProperty),
theme: theme,
__self: _this,
__source: {
fileName: _jsxFileName,
lineNumber: 122,
columnNumber: 17
}
}));
}
// Re-invoke renderAction at render time to pick up live styling
// (depends on state.isDragging in the consumer).
var actionNode = renderAction({
siblings: row.siblings,
item: row.parentItem,
isRootAction: row.isRootAction,
veryLastItem: row.veryLastItem,
depth: row.depth
});
if (!actionNode) {
return null;
}
return /*#__PURE__*/_react["default"].createElement("div", {
key: "action-".concat(row.parentItem.id),
style: positionStyle,
__self: _this,
__source: {
fileName: _jsxFileName,
lineNumber: 150,
columnNumber: 13
}
}, actionNode);
})));
});
var _default = exports["default"] = VirtualContainer;