CKEditor doesn’t translate 4-byte entities correctly.

[Jakub Ś]

Steps to reproduce

Based on: ​http://stackoverflow.com/questions/36574026/disable-conversion-of-html-entities-in-ckeditor

1. Set below configuration in your CKEditor test page

   CKEDITOR.replace( 'editor1', {
   	//entities_processNumerical : 'force'
   	entities_additional : '#128247'
   } );
   

2. Paste the following text into editor and switch to source (and back) "Foo 📷 Bar"

Expected result

Camera character translated to entity 📷

Actual result

For setting entities_processNumerical : 'force' you will get �� in source mode and �� in wysiwyg view.

For setting entities_additional : '#128247' you will get 📷&undefined; in source mode and 📷&undefined; in wysiwyg view. The undefined word will be added every time you change modes.

Other details (browser, OS, CKEditor version, installed plugins)

When I checked in code it looks like character is ok in here: ​https://github.com/ckeditor/ckeditor-dev/blob/master/plugins/entities/plugin.js#L152 but gets destroyed here: ​https://github.com/ckeditor/ckeditor-dev/blob/master/plugins/entities/plugin.js#L152. It looks like replace method is breaking it.

Now, I'm not sure if this is a problem and if replace method is using charCodeAt or fromCharCode but these methods e.g. ​charCodeAt return codes between 0 and 65535 and this seems to be what is happening here. Every character with code below 65356 is a 3-byte character and is handled properly but starting from 65536 4-byte characters get split into two entities.

Links:

• How to check how many bytes character has: ​https://mothereff.in/byte-counter
• Characters Map: ​http://dev.networkerror.org/utf8/?start=60001&end=70001&cols=6&show_uni_int=on&show_uni_hex=on&show_html_ent=on&show_raw_hex=on
• Something that might help: ​http://stackoverflow.com/a/6242192/4555078

[Jakub Ś]

#14587 was marked as duplicate.

[Jakub Ś]

#17018 was marked as duplicate.