@ngx-formly/core
Version:
Formly is a dynamic (JSON powered) form library for Angular that bring unmatched maintainability to your application's forms.
285 lines • 38.6 kB
JavaScript
import { isObservable } from 'rxjs';
import { AbstractControl } from '@angular/forms';
import { ChangeDetectorRef, ComponentRef, TemplateRef, Type } from '@angular/core';
export function disableTreeValidityCall(form, callback) {
const _updateTreeValidity = form._updateTreeValidity.bind(form);
form._updateTreeValidity = () => { };
callback();
form._updateTreeValidity = _updateTreeValidity;
}
export function getFieldId(formId, field, index) {
if (field.id) {
return field.id;
}
let type = field.type;
if (!type && field.template) {
type = 'template';
}
if (type instanceof Type) {
type = type.prototype.constructor.name;
}
return [formId, type, field.key, index].join('_');
}
export function hasKey(field) {
return !isNil(field.key) && field.key !== '';
}
export function getKeyPath(field) {
if (!hasKey(field)) {
return [];
}
/* We store the keyPath in the field for performance reasons. This function will be called frequently. */
if (field._keyPath?.key !== field.key) {
let path = [];
if (typeof field.key === 'string') {
const key = field.key.indexOf('[') === -1 ? field.key : field.key.replace(/\[(\w+)\]/g, '.$1');
path = key.indexOf('.') !== -1 ? key.split('.') : [key];
}
else if (Array.isArray(field.key)) {
path = field.key.slice(0);
}
else {
path = [`${field.key}`];
}
defineHiddenProp(field, '_keyPath', { key: field.key, path });
}
return field._keyPath.path.slice(0);
}
export const FORMLY_VALIDATORS = ['required', 'pattern', 'minLength', 'maxLength', 'min', 'max'];
export function assignFieldValue(field, value) {
let paths = getKeyPath(field);
if (paths.length === 0) {
return;
}
let root = field;
while (root.parent) {
root = root.parent;
paths = [...getKeyPath(root), ...paths];
}
if (value === undefined && field.resetOnHide) {
const k = paths.pop();
const m = paths.reduce((model, path) => model[path] || {}, root.model);
delete m[k];
return;
}
assignModelValue(root.model, paths, value);
}
export function assignModelValue(model, paths, value) {
for (let i = 0; i < paths.length - 1; i++) {
const path = paths[i];
if (!model[path] || !isObject(model[path])) {
model[path] = /^\d+$/.test(paths[i + 1]) ? [] : {};
}
model = model[path];
}
model[paths[paths.length - 1]] = clone(value);
}
export function getFieldValue(field) {
let model = field.parent ? field.parent.model : field.model;
for (const path of getKeyPath(field)) {
if (!model) {
return model;
}
model = model[path];
}
return model;
}
export function reverseDeepMerge(dest, ...args) {
args.forEach((src) => {
for (const srcArg in src) {
if (isNil(dest[srcArg]) || isBlankString(dest[srcArg])) {
dest[srcArg] = clone(src[srcArg]);
}
else if (objAndSameType(dest[srcArg], src[srcArg])) {
reverseDeepMerge(dest[srcArg], src[srcArg]);
}
}
});
return dest;
}
// check a value is null or undefined
export function isNil(value) {
return value == null;
}
export function isUndefined(value) {
return value === undefined;
}
export function isBlankString(value) {
return value === '';
}
export function isFunction(value) {
return typeof value === 'function';
}
export function objAndSameType(obj1, obj2) {
return (isObject(obj1) &&
isObject(obj2) &&
Object.getPrototypeOf(obj1) === Object.getPrototypeOf(obj2) &&
!(Array.isArray(obj1) || Array.isArray(obj2)));
}
export function isObject(x) {
return x != null && typeof x === 'object';
}
export function isPromise(obj) {
return !!obj && typeof obj.then === 'function';
}
export function clone(value) {
if (!isObject(value) ||
isObservable(value) ||
value instanceof TemplateRef ||
/* instanceof SafeHtmlImpl */ value.changingThisBreaksApplicationSecurity ||
['RegExp', 'FileList', 'File', 'Blob'].indexOf(value.constructor.name) !== -1) {
return value;
}
if (value instanceof Set) {
return new Set(value);
}
if (value instanceof Map) {
return new Map(value);
}
// https://github.com/moment/moment/blob/master/moment.js#L252
if (value._isAMomentObject && isFunction(value.clone)) {
return value.clone();
}
if (value instanceof AbstractControl) {
return null;
}
if (value instanceof Date) {
return new Date(value.getTime());
}
if (Array.isArray(value)) {
return value.slice(0).map((v) => clone(v));
}
// best way to clone a js object maybe
// https://stackoverflow.com/questions/41474986/how-to-clone-a-javascript-es6-class-instance
const proto = Object.getPrototypeOf(value);
let c = Object.create(proto);
c = Object.setPrototypeOf(c, proto);
// need to make a deep copy so we dont use Object.assign
// also Object.assign wont copy property descriptor exactly
return Object.keys(value).reduce((newVal, prop) => {
const propDesc = Object.getOwnPropertyDescriptor(value, prop);
if (propDesc.get) {
Object.defineProperty(newVal, prop, propDesc);
}
else {
newVal[prop] = clone(value[prop]);
}
return newVal;
}, c);
}
export function defineHiddenProp(field, prop, defaultValue) {
Object.defineProperty(field, prop, { enumerable: false, writable: true, configurable: true });
field[prop] = defaultValue;
}
export function observeDeep(source, paths, setFn) {
let observers = [];
const unsubscribe = () => {
observers.forEach((observer) => observer());
observers = [];
};
const observer = observe(source, paths, ({ firstChange, currentValue }) => {
!firstChange && setFn();
unsubscribe();
if (isObject(currentValue) && currentValue.constructor.name === 'Object') {
Object.keys(currentValue).forEach((prop) => {
observers.push(observeDeep(source, [...paths, prop], setFn));
});
}
});
return () => {
observer.unsubscribe();
unsubscribe();
};
}
export function observe(o, paths, setFn) {
if (!o._observers) {
defineHiddenProp(o, '_observers', {});
}
let target = o;
for (let i = 0; i < paths.length - 1; i++) {
if (!target[paths[i]] || !isObject(target[paths[i]])) {
target[paths[i]] = /^\d+$/.test(paths[i + 1]) ? [] : {};
}
target = target[paths[i]];
}
const key = paths[paths.length - 1];
const prop = paths.join('.');
if (!o._observers[prop]) {
o._observers[prop] = { value: target[key], onChange: [] };
}
const state = o._observers[prop];
if (target[key] !== state.value) {
state.value = target[key];
}
if (setFn && state.onChange.indexOf(setFn) === -1) {
state.onChange.push(setFn);
setFn({ currentValue: state.value, firstChange: true });
if (state.onChange.length >= 1 && isObject(target)) {
const { enumerable } = Object.getOwnPropertyDescriptor(target, key) || { enumerable: true };
Object.defineProperty(target, key, {
enumerable,
configurable: true,
get: () => state.value,
set: (currentValue) => {
if (currentValue !== state.value) {
const previousValue = state.value;
state.value = currentValue;
state.onChange.forEach((changeFn) => changeFn({ previousValue, currentValue, firstChange: false }));
}
},
});
}
}
return {
setValue(currentValue, emitEvent = true) {
if (currentValue === state.value) {
return;
}
const previousValue = state.value;
state.value = currentValue;
state.onChange.forEach((changeFn) => {
if (changeFn !== setFn && emitEvent) {
changeFn({ previousValue, currentValue, firstChange: false });
}
});
},
unsubscribe() {
state.onChange = state.onChange.filter((changeFn) => changeFn !== setFn);
if (state.onChange.length === 0) {
delete o._observers[prop];
}
},
};
}
export function getField(f, key) {
key = (Array.isArray(key) ? key.join('.') : key);
if (!f.fieldGroup) {
return undefined;
}
for (let i = 0, len = f.fieldGroup.length; i < len; i++) {
const c = f.fieldGroup[i];
const k = (Array.isArray(c.key) ? c.key.join('.') : c.key);
if (k === key) {
return c;
}
if (c.fieldGroup && (isNil(k) || key.indexOf(`${k}.`) === 0)) {
const field = getField(c, isNil(k) ? key : key.slice(k.length + 1));
if (field) {
return field;
}
}
}
return undefined;
}
export function markFieldForCheck(field) {
field._componentRefs?.forEach((ref) => {
// NOTE: we cannot use ref.changeDetectorRef, see https://github.com/ngx-formly/ngx-formly/issues/2191
if (ref instanceof ComponentRef) {
const changeDetectorRef = ref.injector.get(ChangeDetectorRef);
changeDetectorRef.markForCheck();
}
else {
ref.markForCheck();
}
});
}
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[] : {};\n    }\n\n    model = model[path];\n  }\n\n  model[paths[paths.length - 1]] = clone(value);\n}\n\nexport function getFieldValue(field: FormlyFieldConfig): any {\n  let model = field.parent ? field.parent.model : field.model;\n  for (const path of getKeyPath(field)) {\n    if (!model) {\n      return model;\n    }\n    model = model[path];\n  }\n\n  return model;\n}\n\nexport function reverseDeepMerge(dest: any, ...args: any[]) {\n  args.forEach((src) => {\n    for (const srcArg in src) {\n      if (isNil(dest[srcArg]) || isBlankString(dest[srcArg])) {\n        dest[srcArg] = clone(src[srcArg]);\n      } else if (objAndSameType(dest[srcArg], src[srcArg])) {\n        reverseDeepMerge(dest[srcArg], src[srcArg]);\n      }\n    }\n  });\n  return dest;\n}\n\n// check a value is null or undefined\nexport function isNil(value: any) {\n  return value == null;\n}\n\nexport function isUndefined(value: any) {\n  return value === undefined;\n}\n\nexport function isBlankString(value: any) {\n  return value === '';\n}\n\nexport function isFunction(value: any) {\n  return typeof value === 'function';\n}\n\nexport function objAndSameType(obj1: any, obj2: any) {\n  return (\n    isObject(obj1) &&\n    isObject(obj2) &&\n    Object.getPrototypeOf(obj1) === Object.getPrototypeOf(obj2) &&\n    !(Array.isArray(obj1) || Array.isArray(obj2))\n  );\n}\n\nexport function isObject(x: any) {\n  return x != null && typeof x === 'object';\n}\n\nexport function isPromise(obj: any): obj is Promise<any> {\n  return !!obj && typeof obj.then === 'function';\n}\n\nexport function clone(value: any): any {\n  if (\n    !isObject(value) ||\n    isObservable(value) ||\n    value instanceof TemplateRef ||\n    /* instanceof SafeHtmlImpl */ value.changingThisBreaksApplicationSecurity ||\n    ['RegExp', 'FileList', 'File', 'Blob'].indexOf(value.constructor.name) !== -1\n  ) {\n    return value;\n  }\n\n  if (value instanceof Set) {\n    return new Set(value);\n  }\n\n  if (value instanceof Map) {\n    return new Map(value);\n  }\n\n  // https://github.com/moment/moment/blob/master/moment.js#L252\n  if (value._isAMomentObject && isFunction(value.clone)) {\n    return value.clone();\n  }\n\n  if (value instanceof AbstractControl) {\n    return null;\n  }\n\n  if (value instanceof Date) {\n    return new Date(value.getTime());\n  }\n\n  if (Array.isArray(value)) {\n    return value.slice(0).map((v) => clone(v));\n  }\n\n  // best way to clone a js object maybe\n  // https://stackoverflow.com/questions/41474986/how-to-clone-a-javascript-es6-class-instance\n  const proto = Object.getPrototypeOf(value);\n  let c = Object.create(proto);\n  c = Object.setPrototypeOf(c, proto);\n  // need to make a deep copy so we dont use Object.assign\n  // also Object.assign wont copy property descriptor exactly\n  return Object.keys(value).reduce((newVal, prop) => {\n    const propDesc = Object.getOwnPropertyDescriptor(value, prop);\n    if (propDesc.get) {\n      Object.defineProperty(newVal, prop, propDesc);\n    } else {\n      newVal[prop] = clone(value[prop]);\n    }\n\n    return newVal;\n  }, c);\n}\n\nexport function defineHiddenProp(field: any, prop: string, defaultValue: any) {\n  Object.defineProperty(field, prop, { enumerable: false, writable: true, configurable: true });\n  field[prop] = defaultValue;\n}\n\ntype IObserveFn<T> = (change: { currentValue: T; previousValue?: T; firstChange: boolean }) => void;\nexport interface IObserver<T> {\n  setValue: (value: T, emitEvent?: boolean) => void;\n  unsubscribe: Function;\n}\ninterface IObserveTarget<T> {\n  [prop: string]: any;\n  _observers?: {\n    [prop: string]: {\n      value: T;\n      onChange: IObserveFn<T>[];\n    };\n  };\n}\n\nexport function observeDeep<T = any>(source: IObserveTarget<T>, paths: string[], setFn: () => void): () => void {\n  let observers: Function[] = [];\n\n  const unsubscribe = () => {\n    observers.forEach((observer) => observer());\n    observers = [];\n  };\n  const observer = observe(source, paths, ({ firstChange, currentValue }) => {\n    !firstChange && setFn();\n\n    unsubscribe();\n    if (isObject(currentValue) && currentValue.constructor.name === 'Object') {\n      Object.keys(currentValue).forEach((prop) => {\n        observers.push(observeDeep(source, [...paths, prop], setFn));\n      });\n    }\n  });\n\n  return () => {\n    observer.unsubscribe();\n    unsubscribe();\n  };\n}\n\nexport function observe<T = any>(o: IObserveTarget<T>, paths: string[], setFn?: IObserveFn<T>): IObserver<T> {\n  if (!o._observers) {\n    defineHiddenProp(o, '_observers', {});\n  }\n\n  let target = o;\n  for (let i = 0; i < paths.length - 1; i++) {\n    if (!target[paths[i]] || !isObject(target[paths[i]])) {\n      target[paths[i]] = /^\\d+$/.test(paths[i + 1]) ? 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