523037 - <maction> child drops below the line

Status: RESOLVED FIXED

(Core :: MathML, defect)

Description

[Catalin David]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.3) Gecko/20091007 Ubuntu/9.10 (karmic) Firefox/3.5.3
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.3) Gecko/20091007 Ubuntu/9.10 (karmic) Firefox/3.5.3

We are working on creating "active" documents, providing a user interface by which the user can change the content of a pre-fetched file.

Therefore, for example, when testing the unit conversion, if the JavaScript code behind modifies the document in order to create new children under the <maction> tag, the new content that is added will appear one level under the normal height of the text, as if it were on the next row.

Reproducible: Always

Steps to Reproduce:
1. Right click on the 100 metre element (be careful to move the mouse in the upper right corner -- jQuery bug)
2. Select convert to miles
3. Wait... the webservice providing this data is very slow
4. When the new <maction> child is created, it will be displayed under the current level of the line it should belong to.
Actual Results:  
The new child (result in miles) is one level under the normal flow of the text.

Expected Results:  
The <maction> child should be at the same level.

Comment 1

[Frédéric Wang (:fredw)]

Attachment: Screenshot

This is quite difficult to reproduce. Sometimes, javascript errors are reported. A reduced testcase would help to understand what is happening.

Comment 2

[Catalin David]

Attachment: Nested maction

This is a sample testcase where nested maction-s result in text being displayed in a weird way, as if it were on a new row.

Comment 3

[Frédéric Wang (:fredw)]

Attachment: Testcase

Thanks for the testcase, I've reduced it any further.

Comment 4

[Frédéric Wang (:fredw)]

Fixed by the patch of bug 556767.