dnd-core/lib/reducers/dirtyHandlerIds.js

Drag and drop sans the GUI

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var xor_1 = __importDefault(require("lodash/xor"));
var dragDrop_1 = require("../actions/dragDrop");
var registry_1 = require("../actions/registry");
var equality_1 = require("../utils/equality");
var dirtiness_1 = require("../utils/dirtiness");
function dirtyHandlerIds(state, action) {
    if (state === void 0) { state = dirtiness_1.NONE; }
    switch (action.type) {
        case dragDrop_1.HOVER:
            break;
        case registry_1.ADD_SOURCE:
        case registry_1.ADD_TARGET:
        case registry_1.REMOVE_TARGET:
        case registry_1.REMOVE_SOURCE:
            return dirtiness_1.NONE;
        case dragDrop_1.BEGIN_DRAG:
        case dragDrop_1.PUBLISH_DRAG_SOURCE:
        case dragDrop_1.END_DRAG:
        case dragDrop_1.DROP:
        default:
            return dirtiness_1.ALL;
    }
    var _a = action.payload, _b = _a.targetIds, targetIds = _b === void 0 ? [] : _b, _c = _a.prevTargetIds, prevTargetIds = _c === void 0 ? [] : _c;
    var result = xor_1.default(targetIds, prevTargetIds);
    var didChange = result.length > 0 || !equality_1.areArraysEqual(targetIds, prevTargetIds);
    if (!didChange) {
        return dirtiness_1.NONE;
    }
    // Check the target ids at the innermost position. If they are valid, add them
    // to the result
    var prevInnermostTargetId = prevTargetIds[prevTargetIds.length - 1];
    var innermostTargetId = targetIds[targetIds.length - 1];
    if (prevInnermostTargetId !== innermostTargetId) {
        if (prevInnermostTargetId) {
            result.push(prevInnermostTargetId);
        }
        if (innermostTargetId) {
            result.push(innermostTargetId);
        }
    }
    return result;
}
exports.default = dirtyHandlerIds;
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