Printed content is different than the content in print preview

[f1ames]

Type of report

Feature request

Provide detailed reproduction steps (if any)

1. Go to https://ckeditor.com/docs/ckeditor4/latest/examples/fullpreset.html.
2. Insert page break in the content.
3. Click editors print button.

Expected result

Page break creates new page / page separation in printable document.

Actual result

Page break creates new page / page separation in printable document. Page break element is visible in the document on the preceding page.

Other details

• Browser: Tested on Chrome.
• OS: Linux
• CKEditor version: 4.13.0 (4.10.0)
• Installed CKEditor plugins: pagebreak,print

[Comandeer]

The issue is present for every other fake object inside the editor, e.g. anchor or iframe placeholder:

It's connected with the fact that our print plugin just invokes native print command:

ckeditor4/plugins/print/plugin.js

Lines 37 to 41 in 438226e

	if ( CKEDITOR.env.gecko ) {
	editor.window.$.print();
	} else {
	editor.document.$.execCommand( 'Print' );
	}

Therefore it's more of a feature request than bug.

OTOH it also means that for years our preview plugin has been totally useless…

[Comandeer]

Probably the best course of action will be to join print and preview plugins. There will be still two buttons: preview one will just open the page with preview and print one – open the page and invoke printing it.