Track changes in Angular Document editor component

26 Jun 20244 minutes to read

Track Changes allows you to keep a record of changes or edits made to a document. You can then choose to accept or reject the modifications. It is a useful tool for managing changes made by several reviewers to the same document. If track changes option is enabled, all editing operations are preserved as revisions in Document Editor.

Enable track changes in Document Editor

The following example demonstrates how to enable track changes.

 <ejs-documenteditor [enableTrackChanges]=true height="330px" style="display:block"></ejs-documenteditor>

Get all tracked revisions

The following example demonstrate how to get all tracked revision from current document.

/**
 * Get revisions from the current document
 */
let revisions : RevisionCollection = this.documentEditor.revisions;

Accept or Reject all changes programmatically

The following example demonstrates how to accept/reject all changes.

/**
 * Get revisions from the current document
 */
let revisions : RevisionCollection = this.documentEditor.revisions;

/**
 * Accept all tracked changes
 */
revisions.acceptAll();

/**
 * Reject all tracked changes
 */
revisions.rejectAll();

Accept or reject a specific revision

The following example demonstrates how to accept/reject specific revision in the Document Editor.

/**
 * Get revisions from the current document
 */
let revisions : RevisionCollection = this.documentEditor.revisions;
/**
 * Accept specific changes
 */
revisions.get(0).accept();
/**
 * Reject specific changes
 */
revisions.get(1).reject();

Navigate between the tracked changes

The following example demonstrates how to navigate tracked revision programmatically.

/**
 * Navigate to next tracked change from the current selection.
 */
this.documentEditor.selection.navigateNextRevision();

/**
 * Navigate to previous tracked change from the current selection.
 */
this.documentEditor.selection.navigatePreviousRevision();

Filtering changes based on user

In DocumentEditor, we have built-in review panel in which we have provided support for filtering changes based on the user.

Protect the document in track changes only mode

Document Editor provides support for protecting the document with RevisionsOnly protection. In this protection, all the users are allowed to view the document and do their corrections, but they cannot accept or reject any tracked changes in the document. Later, the author can view their corrections and accept or reject the changes.

Document editor provides an option to protect and unprotect document using enforceProtection and stopProtection API.

The following example code illustrates how to enforce and stop protection in Document editor container.

import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { DocumentEditorContainerComponent, ToolbarService } from '@syncfusion/ej2-angular-documenteditor';

@Component({
      selector: 'app-container',
      // specifies the template string for the Document Editor component
      template: `<div><button ejs-button (click)="protectDocument()" >Protect</button>
      <button ejs-button (click)="unProtectDocument()" >Unprotect</button>
      <ejs-documenteditorcontainer #document_editor serviceUrl="https://services.syncfusion.com/angular/production/api/documenteditor/" height="600px" style="display:block" [enableToolbar]=true> </ejs-documenteditorcontainer></div>`,
      encapsulation: ViewEncapsulation.None,
      providers: [ToolbarService]
})
export class AppComponent {
    @ViewChild('document_editor')
    public container: DocumentEditorContainerComponent;

    public protectDocument(): void {
        //enforce protection
        container.documentEditor.editor.enforceProtection('123', 'RevisionsOnly');
    }

    public unProtectDocument(): void {
        //stop the document protection
        container.documentEditor.editor.stopProtection('123');
    }
}

Tracked changes only protection can be enabled in UI by using Restrict Editing pane

Note: In enforce Protection method, first parameter denotes password and second parameter denotes protection type. Possible values of protection type are NoProtection |ReadOnly |FormFieldsOnly |CommentsOnly |RevisionsOnly. In stop protection method, parameter denotes the password.

Event

You can restrict the accept and reject changes based on the author name. The following example demonstrates how to restrict an author from accept/reject changes.

import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { DocumentEditorContainerComponent, ToolbarService } from '@syncfusion/ej2-angular-documenteditor';

@Component({
  selector: 'app-your-component',
  template: `
    <DocumentEditorContainerComponent #container style="display: block;" [height]="'590px'" (beforeAcceptRejectChanges)="beforeAcceptRejectChanges($event)" [enableToolbar]="true"></DocumentEditorContainerComponent>
  `
})
export class YourComponent {
  @ViewChild('container', { static: true }) container: DocumentEditorContainerComponent;

  beforeAcceptRejectChanges(args) {
    // Check the author of the revision
    if (args.author !== 'Hary') {
      // Cancel the accept/reject action
      args.cancel = true;
    }
  }
}