503672 - Copying and pasting within the same document loses formatting (application/xhtml+xml)

Status: RESOLVED DUPLICATE of bug 319141

(Core :: DOM: Editor, defect)

Description

[Daniel Sevcik]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-GB; rv:1.9.1) Gecko/20090624 Firefox/3.5
Build Identifier: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-GB; rv:1.9.1) Gecko/20090624 Firefox/3.5

Manipulation with the document (moving using the mouse mark&drag&drop, copying&pasting using the context menu and/or keybord shotcuts) causes the pasted text became plain text.

Related only to application/xhtml+xml content-type. Same example with text/html works well.

This makes impossible to use the WYSIWYG editor (with @contenteditable and/or document.designMode) for editing any real XHTML document.

Generally copying any XHTML content from the application/xhtml+xml is possible only in plain-text mode (tried copying the XHTML document into OpenOffice as well).

Reproducible: Always

Steps to Reproduce:
1. Visit http://crash.webdevelopers.cz/index03.xhtml
2. Mark and formatted content and copy it into clibpoard  
3. Paste it back into the document (BODY has the attribute @contenteditable="true")

1. Mark any part of the document with mouse.
2. Drag and drop it into the same document.
Actual Results:  
Pasted document fragment looses all formatting.

Expected Results:  
Copied document fragment preserves as much formatting as possible. 

There is the same document but with "text/html" content-type header here:
http://crash.webdevelopers.cz/index03.html
This one works as expected.