@yoyoboot/l-52abp-ng-form-generator/esm2015/ngx-drag-drop/dnd-state.js

This library was generated with [Angular CLI](https://github.com/angular/angular-cli) version 12.2.0.

import { CUSTOM_MIME_TYPE, DROP_EFFECTS, filterEffects, getWellKnownMimeType, JSON_MIME_TYPE, MSIE_MIME_TYPE } from "./dnd-utils";
const _dndState = {
    isDragging: false,
    dropEffect: "none",
    effectAllowed: "all",
    type: undefined
};
export function startDrag(event, effectAllowed, type) {
    _dndState.isDragging = true;
    _dndState.dropEffect = "none";
    _dndState.effectAllowed = effectAllowed;
    _dndState.type = type;
    event.dataTransfer.effectAllowed = effectAllowed;
}
export function endDrag() {
    _dndState.isDragging = false;
    _dndState.dropEffect = undefined;
    _dndState.effectAllowed = undefined;
    _dndState.type = undefined;
}
export function setDropEffect(event, dropEffect) {
    if (_dndState.isDragging === true) {
        _dndState.dropEffect = dropEffect;
    }
    event.dataTransfer.dropEffect = dropEffect;
}
export function getDropEffect(event, effectAllowed) {
    const dataTransferEffectAllowed = (event.dataTransfer) ? event.dataTransfer.effectAllowed : "uninitialized";
    let effects = filterEffects(DROP_EFFECTS, dataTransferEffectAllowed);
    if (_dndState.isDragging === true) {
        effects = filterEffects(effects, _dndState.effectAllowed);
    }
    if (effectAllowed) {
        effects = filterEffects(effects, effectAllowed);
    }
    // MacOS automatically filters dataTransfer.effectAllowed depending on the modifier keys,
    // therefore the following modifier keys will only affect other operating systems.
    if (effects.length === 0) {
        return "none";
    }
    if (event.ctrlKey && effects.indexOf("copy") !== -1) {
        return "copy";
    }
    if (event.altKey && effects.indexOf("link") !== -1) {
        return "link";
    }
    return effects[0];
}
export function getDndType(event) {
    if (_dndState.isDragging === true) {
        return _dndState.type;
    }
    const mimeType = getWellKnownMimeType(event);
    if (mimeType === null) {
        return undefined;
    }
    if (mimeType === MSIE_MIME_TYPE
        || mimeType === JSON_MIME_TYPE) {
        return undefined;
    }
    return mimeType.substr(CUSTOM_MIME_TYPE.length + 1) || undefined;
}
export function isExternalDrag() {
    return _dndState.isDragging === false;
}
export const dndState = _dndState;
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