@kishorethecoder/ngx-treeview
Version:
An Angular treeview component with checkbox upgraded with angular 14
156 lines • 18.7 kB
JavaScript
import { isBoolean, isNil, isString } from 'lodash-es';
import { TreeviewHelper } from '../helpers/treeview-helper';
export class TreeviewItem {
constructor(item, autoCorrectChecked = false) {
this.internalDisabled = false;
this.internalChecked = true;
this.internalCollapsed = false;
this.parentCount = 0;
if (isNil(item)) {
throw new Error('Item must be defined');
}
if (isString(item.text)) {
this.text = item.text;
}
else {
throw new Error('A text of item must be string object');
}
this.value = item.value;
if (isBoolean(item.checked)) {
this.checked = item.checked;
}
if (isBoolean(item.collapsed)) {
this.collapsed = item.collapsed;
}
if (isBoolean(item.disabled)) {
this.disabled = item.disabled;
}
if (item.parentCount)
this.parentCount = item.parentCount;
if (!isNil(item.children) && item.children.length > 0) {
this.children = item.children.map((child) => {
if (this.disabled === true) {
child.disabled = true;
}
return new TreeviewItem(child);
});
}
if (autoCorrectChecked) {
this.correctChecked();
}
}
get checked() {
return this.internalChecked;
}
set checked(value) {
if (!this.internalDisabled) {
if (this.internalChecked !== value) {
this.internalChecked = value;
}
}
}
get indeterminate() {
return this.checked === undefined;
}
setCheckedRecursive(value) {
if (!this.internalDisabled) {
this.internalChecked = value;
if (!isNil(this.internalChildren)) {
this.internalChildren.forEach((child) => child.setCheckedRecursive(value));
}
}
}
get disabled() {
return this.internalDisabled;
}
set disabled(value) {
if (this.internalDisabled !== value) {
this.internalDisabled = value;
if (!isNil(this.internalChildren)) {
this.internalChildren.forEach((child) => (child.disabled = value));
}
}
}
get collapsed() {
return this.internalCollapsed;
}
set collapsed(value) {
if (this.internalCollapsed !== value) {
this.internalCollapsed = value;
}
}
setCollapsedRecursive(value) {
this.internalCollapsed = value;
if (!isNil(this.internalChildren)) {
this.internalChildren.forEach((child) => child.setCollapsedRecursive(value));
}
}
get children() {
return this.internalChildren;
}
set children(value) {
if (this.internalChildren !== value) {
if (!isNil(value) && value.length === 0) {
throw new Error('Children must be not an empty array');
}
this.internalChildren = value;
if (!isNil(this.internalChildren)) {
let checked = null;
this.internalChildren.forEach((child) => {
if (checked === null) {
checked = child.checked;
}
else {
if (child.checked !== checked) {
checked = undefined;
return;
}
}
});
this.internalChecked = checked;
}
}
}
getSelection() {
let checkedItems = [];
let uncheckedItems = [];
if (this.internalChecked) {
checkedItems.push(this);
}
else {
uncheckedItems.push(this);
}
if (!isNil(this.internalChildren)) {
const selection = TreeviewHelper.concatSelection(this.internalChildren, checkedItems, uncheckedItems);
checkedItems = selection.checked;
uncheckedItems = selection.unchecked;
}
return {
checkedItems,
uncheckedItems,
};
}
correctChecked(decoupleChildFromParent = false) {
this.internalChecked = this.getCorrectChecked(decoupleChildFromParent);
}
getCorrectChecked(decoupleChildFromParent = false) {
let checked = null;
if (!decoupleChildFromParent && !isNil(this.internalChildren)) {
for (const child of this.internalChildren) {
child.internalChecked = child.getCorrectChecked();
if (checked === null) {
checked = child.internalChecked;
}
else if (checked !== child.internalChecked) {
checked = undefined;
break;
}
}
}
else {
checked = this.checked;
}
return checked;
}
}
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{ isBoolean, isNil, isString } from 'lodash-es';\r\nimport { TreeviewHelper } from '../helpers/treeview-helper';\r\n\r\nexport interface TreeviewSelection {\r\n  checkedItems: TreeviewItem[];\r\n  uncheckedItems: TreeviewItem[];\r\n}\r\n\r\nexport interface TreeItem {\r\n  text: string;\r\n  value: any;\r\n  disabled?: boolean;\r\n  checked?: boolean;\r\n  collapsed?: boolean;\r\n  children?: TreeItem[];\r\n  parentCount?: number;\r\n}\r\n\r\nexport class TreeviewItem {\r\n  private internalDisabled = false;\r\n  private internalChecked = true;\r\n  private internalCollapsed = false;\r\n  private internalChildren: TreeviewItem[];\r\n  text: string;\r\n  value: any;\r\n  parentCount = 0;\r\n\r\n  constructor(item: TreeItem, autoCorrectChecked = false) {\r\n    if (isNil(item)) {\r\n      throw new Error('Item must be defined');\r\n    }\r\n    if (isString(item.text)) {\r\n      this.text = item.text;\r\n    } else {\r\n      throw new Error('A text of item must be string object');\r\n    }\r\n    this.value = item.value;\r\n    if (isBoolean(item.checked)) {\r\n      this.checked = item.checked;\r\n    }\r\n    if (isBoolean(item.collapsed)) {\r\n      this.collapsed = item.collapsed;\r\n    }\r\n    if (isBoolean(item.disabled)) {\r\n      this.disabled = item.disabled;\r\n    }\r\n    if (item.parentCount) this.parentCount = item.parentCount;\r\n\r\n    if (!isNil(item.children) && item.children.length > 0) {\r\n      this.children = item.children.map((child) => {\r\n        if (this.disabled === true) {\r\n          child.disabled = true;\r\n        }\r\n\r\n        return new TreeviewItem(child);\r\n      });\r\n    }\r\n\r\n    if (autoCorrectChecked) {\r\n      this.correctChecked();\r\n    }\r\n  }\r\n\r\n  get checked(): boolean {\r\n    return this.internalChecked;\r\n  }\r\n\r\n  set checked(value: boolean) {\r\n    if (!this.internalDisabled) {\r\n      if (this.internalChecked !== value) {\r\n        this.internalChecked = value;\r\n      }\r\n    }\r\n  }\r\n\r\n  get indeterminate(): boolean {\r\n    return this.checked === undefined;\r\n  }\r\n\r\n  setCheckedRecursive(value: boolean): void {\r\n    if (!this.internalDisabled) {\r\n      this.internalChecked = value;\r\n      if (!isNil(this.internalChildren)) {\r\n        this.internalChildren.forEach((child) =>\r\n          child.setCheckedRecursive(value)\r\n        );\r\n      }\r\n    }\r\n  }\r\n\r\n  get disabled(): boolean {\r\n    return this.internalDisabled;\r\n  }\r\n\r\n  set disabled(value: boolean) {\r\n    if (this.internalDisabled !== value) {\r\n      this.internalDisabled = value;\r\n      if (!isNil(this.internalChildren)) {\r\n        this.internalChildren.forEach((child) => (child.disabled = value));\r\n      }\r\n    }\r\n  }\r\n\r\n  get collapsed(): boolean {\r\n    return this.internalCollapsed;\r\n  }\r\n\r\n  set collapsed(value: boolean) {\r\n    if (this.internalCollapsed !== value) {\r\n      this.internalCollapsed = value;\r\n    }\r\n  }\r\n\r\n  setCollapsedRecursive(value: boolean): void {\r\n    this.internalCollapsed = value;\r\n    if (!isNil(this.internalChildren)) {\r\n      this.internalChildren.forEach((child) =>\r\n        child.setCollapsedRecursive(value)\r\n      );\r\n    }\r\n  }\r\n\r\n  get children(): TreeviewItem[] {\r\n    return this.internalChildren;\r\n  }\r\n\r\n  set children(value: TreeviewItem[]) {\r\n    if (this.internalChildren !== value) {\r\n      if (!isNil(value) && value.length === 0) {\r\n        throw new Error('Children must be not an empty array');\r\n      }\r\n      this.internalChildren = value;\r\n      if (!isNil(this.internalChildren)) {\r\n        let checked = null;\r\n        this.internalChildren.forEach((child) => {\r\n          if (checked === null) {\r\n            checked = child.checked;\r\n          } else {\r\n            if (child.checked !== checked) {\r\n              checked = undefined;\r\n              return;\r\n            }\r\n          }\r\n        });\r\n        this.internalChecked = checked;\r\n      }\r\n    }\r\n  }\r\n\r\n  getSelection(): TreeviewSelection {\r\n    let checkedItems: TreeviewItem[] = [];\r\n    let uncheckedItems: TreeviewItem[] = [];\r\n\r\n    if (this.internalChecked) {\r\n      checkedItems.push(this);\r\n    } else {\r\n      uncheckedItems.push(this);\r\n    }\r\n\r\n    if (!isNil(this.internalChildren)) {\r\n      const selection = TreeviewHelper.concatSelection(\r\n        this.internalChildren,\r\n        checkedItems,\r\n        uncheckedItems\r\n      );\r\n      checkedItems = selection.checked;\r\n      uncheckedItems = selection.unchecked;\r\n    }\r\n\r\n    return {\r\n      checkedItems,\r\n      uncheckedItems,\r\n    };\r\n  }\r\n\r\n  correctChecked(decoupleChildFromParent = false): void {\r\n    this.internalChecked = this.getCorrectChecked(decoupleChildFromParent);\r\n  }\r\n\r\n  private getCorrectChecked(decoupleChildFromParent = false): boolean {\r\n    let checked: boolean = null;\r\n    if (!decoupleChildFromParent && !isNil(this.internalChildren)) {\r\n      for (const child of this.internalChildren) {\r\n        child.internalChecked = child.getCorrectChecked();\r\n        if (checked === null) {\r\n          checked = child.internalChecked;\r\n        } else if (checked !== child.internalChecked) {\r\n          checked = undefined;\r\n          break;\r\n        }\r\n      }\r\n    } else {\r\n      checked = this.checked;\r\n    }\r\n\r\n    return checked;\r\n  }\r\n}\r\n"]}